74HC4538; 74HCT4538 Dual retriggerable precision monostable multivibrator Rev. 4 -- 24 February 2016 Product data sheet 1. General description The 74HC4538; 74HCT4538 is a dual retriggerable-resettable monostable multivibrator. Each multivibrator has two trigger/retrigger inputs (nA and nB), a direct reset input (nCD), two complementary outputs (nQ and nQ), and two pins (nREXT/CEXT and nCEXT) for connecting the external timing components CEXT and REXT. Typical pulse width variation over temperature range is 0.2%. The device may be triggered by either the positive or the negative edges of the input pulse. The duration and accuracy of the output pulse are determined by the external timing components CEXT and REXT. The output pulse width (T) is equal to 0.7 REXT CEXT. The linear design techniques guarantee precise control of the output pulse width. A LOW level at nCD terminates the output pulse immediately. Schmitt-trigger action in the trigger inputs makes the circuit highly tolerant to slower rise and fall times. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC. 2. Features and benefits Tolerant of slow trigger rise and fall times Separate reset inputs Triggering from falling or rising edge Complies with JEDEC standard no. 7A Input levels: For 74HC4538: CMOS level For 74HCT4538: TTL level ESD protection: HBM JESD22-A114F exceeds 2000 V MM JESD22-A115-A exceeds 200 V Multiple package options Specified from 40 C to +85 C and from 40 C to +125 C 74HC4538; 74HCT4538 Nexperia Dual retriggerable precision monostable multivibrator 3. Ordering information Table 1. Ordering information Type number 74HC4538D Package Temperature range Name Description Version 40 C to +125 C SO16 plastic small outline package; 16 leads; body width 3.9 mm SOT109-1 40 C to +125 C SSOP16 plastic shrink small outline package; 16 leads; body width 5.3 mm 40 C to +125 C TSSOP16 plastic thin shrink small outline package; 16 leads; body width 4.4 mm 74HCT4538D 74HC4538DB 74HCT4538DB 74HC4538PW 74HCT4538PW SOT338-1 SOT403-1 4. Functional diagram 5(;7&(;7 &(;7 $ % 4 4 4 &' 5(;7&(;7 &(;7 $ % 4 &' DDH Fig 1. Functional diagram 74HC_HCT4538 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 -- 24 February 2016 (c) Nexperia B.V. 2017. All rights reserved 2 of 24 74HC4538; 74HCT4538 Nexperia Dual retriggerable precision monostable multivibrator Q% Q$ 9&& Q5(;7&(;7 9UHI HQDEOH Q&(;7 *1' Q&' SRZHURQUHVHW 9&& 9UHI HQDEOH Q4 Q4 PED *1' Fig 2. Logic diagram (one multivibrator) 74HC_HCT4538 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 -- 24 February 2016 (c) Nexperia B.V. 2017. All rights reserved 3 of 24 74HC4538; 74HCT4538 Nexperia Dual retriggerable precision monostable multivibrator 5. Pinning information 5.1 Pinning +& +&7 &(;7 9&& 5(;7&(;7 &(;7 &' 5(;7&(;7 +& +&7 &(;7 5(;7&(;7 9&& &(;7 % &' &' 5(;7&(;7 $ % % &' $ $ % 4 $ 4 4 *1' 4 4 *1' 4 4 DDN Fig 3. 4 DDN Pin configuration for SO16 Fig 4. Pin configuration for SSOP16 and TSSOP16 5.2 Pin description Table 2. Pin description Symbol Pin Description 1CEXT, 2CEXT 1, 15 external capacitor connection (always connected to ground) 1REXT/CEXT, 2REXT/CEXT 2, 14 external capacitor/resistor connection 1CD, 2CD 3, 13 direct reset input (active LOW) 1B, 2B 4, 12 input (LOW to HIGH triggered) 1A, 2A 5, 11 input (HIGH to LOW triggered) 1Q, 2Q 6, 10 output 1Q, 2Q 7, 9 complementary output (active LOW) GND 8 ground (0 V) VCC 16 supply voltage 74HC_HCT4538 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 -- 24 February 2016 (c) Nexperia B.V. 2017. All rights reserved 4 of 24 74HC4538; 74HCT4538 Nexperia Dual retriggerable precision monostable multivibrator 6. Functional description Table 3. Function table Inputs Outputs nA nB nCD L H H H X X L [1] nQ nQ L H H = HIGH voltage level; L = LOW voltage level; X = don't care; = positive-going transition; = negative-going transition; = one HIGH level output pulse, with the pule width determined by CEXT and REXT; = one LOW level output pulse, with the pulse width determined by CEXT and REXT. Q%LQSXW Q$LQSXW Q&'LQSXW Q5(;7&(;7LQSXW 9UHI 9UHI 9UHI 9UHI Q4RXWSXW 7 7 7 DDH (1) Positive edge triggering. (2) Positive edge re-triggering (pulse lengthening). (3) Negative edge triggering. (4) Reset (pulse shortening). (5) T = 0.7 REXT CEXT (see also Figure 6). Fig 5. Timing diagram 74HC_HCT4538 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 -- 24 February 2016 (c) Nexperia B.V. 2017. All rights reserved 5 of 24 74HC4538; 74HCT4538 Nexperia Dual retriggerable precision monostable multivibrator &(;7 5(;7 *1' Q&(;7 9&& Q5(;7&(;7 Q$ Q% Q4 7 Q4 7 i5(;7i&(;7 Q&' Fig 6. DDN Connection of the external timing components REXT and CEXT 7. Limiting values Table 4. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V). Symbol Parameter VCC supply voltage Conditions Min Max Unit 0.5 +7.0 V - 20 mA - 20 mA input clamping current VI < 0.5 V or VI > VCC + 0.5 V [1] IOK output clamping current VO < 0.5 V or VO > VCC + 0.5 V [1] IO output current VO = 0.5 V to VCC + 0.5 V - 25 mA ICC supply current - +50 mA IGND ground current 50 - mA Tstg storage temperature 65 +150 C Ptot total power dissipation IIK Tamb = 40 C to +125 C SO16 package [2] - 500 mW (T)SSOP16 package [3] - 500 mW [1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed. [2] Ptot derates linearly with 8 mW/K above 70 C. [3] Ptot derates linearly with 5.5 mW/K above 60 C. 74HC_HCT4538 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 -- 24 February 2016 (c) Nexperia B.V. 2017. All rights reserved 6 of 24 74HC4538; 74HCT4538 Nexperia Dual retriggerable precision monostable multivibrator 8. Recommended operating conditions Table 5. Recommended operating conditions Voltages are referenced to GND (ground = 0 V) Symbol Parameter Conditions 74HC4538 Min Typ 74HCT4538 Max Min Typ Unit Max VCC supply voltage 2.0 5.0 6.0 4.5 5.0 5.5 V VI input voltage 0 - VCC 0 - VCC V VO output voltage 0 - VCC 0 - VCC V Tamb ambient temperature 40 - +125 40 - +125 C t/V input transition rise and fall rate VCC = 2.0 V - - 625 - - - ns/V VCC = 4.5 V - 1.67 139 - 1.67 139 ns/V VCC = 6.0 V - - 83 - - - ns/V 9. Static characteristics Table 6. Static characteristics At recommended operating conditions; voltages are referenced to GND (ground = 0 V). Symbol Parameter 25 C Conditions 40 C to +85 C 40 C to +125 C Unit Min Typ Max Min Max Min Max VCC = 2.0 V 1.5 1.2 - 1.5 - 1.5 - V VCC = 4.5 V 3.15 2.4 - 3.15 - 3.15 - V VCC = 6.0 V 4.2 3.2 - 4.2 - 4.2 - V VCC = 2.0 V - 0.8 0.5 - 0.5 - 0.5 V VCC = 4.5 V - 2.1 1.35 - 1.35 - 1.35 V VCC = 6.0 V - 2.8 1.8 - 1.8 - 1.8 V IO = 20 A; VCC = 2.0 V 1.9 2.0 - 1.9 - 1.9 - V IO = 20 A; VCC = 4.5 V 4.4 4.5 - 4.4 - 4.4 - V IO = 20 A; VCC = 6.0 V 5.9 6.0 - 5.9 - 5.9 - V IO = 4.0 mA; VCC = 4.5 V 3.98 4.32 - 3.84 - 3.7 - V IO = 5.2 mA; VCC = 6.0 V 5.48 5.81 - 5.34 - 5.2 - V IO = 20 A; VCC = 2.0 V - 0 0.1 - 0.1 - 0.1 V IO = 20 A; VCC = 4.5 V - 0 0.1 - 0.1 - 0.1 V IO = 20 A; VCC = 6.0 V - 0 0.1 - 0.1 - 0.1 V IO = 4.0 mA; VCC = 4.5 V - 0.15 0.26 - 0.33 - 0.4 V IO = 5.2 mA; VCC = 6.0 V - 0.16 0.26 - 0.33 - 0.4 V VI = VCC or GND; VCC = 6.0 V - - 0.1 - 1 - 1 A pin nREXT/CEXT; VI = 2.0 V or GND; other inputs at VCC or GND; VCC = 6.0 V [1] - - 0.5 - 5 - 10 A 74HC4538 VIH VIL VOH VOL II HIGH-level input voltage LOW-level input voltage HIGH-level output voltage LOW-level output voltage input leakage current 74HC_HCT4538 Product data sheet VI = VIH or VIL VI = VIH or VIL All information provided in this document is subject to legal disclaimers. Rev. 4 -- 24 February 2016 (c) Nexperia B.V. 2017. All rights reserved 7 of 24 74HC4538; 74HCT4538 Nexperia Dual retriggerable precision monostable multivibrator Table 6. Static characteristics ...continued At recommended operating conditions; voltages are referenced to GND (ground = 0 V). Symbol Parameter ICC supply current CI input capacitance 25 C Conditions VI = VCC or GND; IO = 0 A; VCC = 6.0 V 40 C to +85 C 40 C to +125 C Unit Min Typ Max Min Max Min Max - - 8.0 - 80 - 160 A - 3.5 - - - - - pF 74HCT4538 VIH HIGH-level input voltage VCC = 4.5 V to 5.5 V 2.0 1.6 - 2.0 - 2.0 - V VIL LOW-level input voltage VCC = 4.5 V to 5.5 V - 1.2 0.8 - 0.8 - 0.8 V VOH HIGH-level output voltage VI = VIH or VIL; VCC = 4.5 V IO = 20 A 4.4 4.5 - 4.4 - 4.4 - V IO = 4.0 mA 3.98 4.32 - 3.84 - 3.7 - V LOW-level output voltage VOL input leakage current II VI = VIH or VIL; VCC = 4.5 V IO = 20 A; VCC = 4.5 V - 0 0.1 - 0.1 - 0.1 V IO = 4.0 mA; VCC = 4.5 V - 0.15 0.26 - 0.33 - 0.4 V VI = VCC or GND; VCC = 5.5 V - - 0.1 - 1 - 1 A pin nREXT/CEXT; VI = 2.0 V or GND; other inputs at VCC or GND; VCC = 5.5 V [1] - - 0.5 - 5 - 10 A - - 8.0 - 80 - 160 A pin nA, nB - 50 180 - 225 - 245 A pin nCD - 65 234 - 293 - 319 A - 3.5 - - - - - pF ICC supply current VI = VCC or GND; IO = 0 A; VCC = 5.5 V ICC additional supply current VI = VCC 2.1 V; IO = 0 A; other inputs at VCC or GND; VCC = 4.5 V to 5.5 V input capacitance CI [1] This measurement can only be carried out after a trigger pulse is applied. 74HC_HCT4538 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 -- 24 February 2016 (c) Nexperia B.V. 2017. All rights reserved 8 of 24 74HC4538; 74HCT4538 Nexperia Dual retriggerable precision monostable multivibrator 10. Dynamic characteristics Table 7. Dynamic characteristics Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 9. Symbol Parameter 25 C Conditions 40 C to +85 C Min Typ[1] Max Min Max 40 C to +125 C Min Max Unit 74HC4538 tPLH LOW to HIGH propagation delay nA, nB to nQ; see Figure 7 VCC = 2.0 V - 85 265 - 330 - 400 ns VCC = 4.5 V - 31 53 - 66 - 80 ns VCC = 5.0 V; CL = 15 pF - 27 - - - - - ns VCC = 6.0 V - 25 45 - 56 - 68 ns VCC = 2.0 V - 83 265 - 340 - 400 ns VCC = 4.5 V - 30 53 - 68 - 80 ns VCC = 6.0 V - 24 45 - 58 - 68 ns VCC = 2.0 V - 83 265 - 330 - 400 ns VCC = 4.5 V - 30 53 - 66 - 80 ns VCC = 5.0 V; CL = 15 pF - 27 - - - - - ns VCC = 6.0 V - 24 45 - 56 - 68 ns VCC = 2.0 V - 80 265 - 330 - 400 ns VCC = 4.5 V - 29 53 - 66 - 80 ns VCC = 6.0 V - 23 45 - 56 - 68 ns VCC = 2.0 V - 19 75 - 95 - 119 ns VCC = 4.5 V - 7 15 - 19 - 22 ns VCC = 6.0 V - 6 13 - 16 - 19 ns nCD to nQ; see Figure 7 tPHL HIGH to LOW propagation delay nA, nB to nQ; see Figure 7 nCD to nQ; see Figure 7 tt transition time 74HC_HCT4538 Product data sheet nQ and nQ; see Figure 7 [2] All information provided in this document is subject to legal disclaimers. Rev. 4 -- 24 February 2016 (c) Nexperia B.V. 2017. All rights reserved 9 of 24 74HC4538; 74HCT4538 Nexperia Dual retriggerable precision monostable multivibrator Table 7. Dynamic characteristics ...continued Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 9. Symbol Parameter tW pulse width 25 C Conditions 40 C to +85 C 40 C to +125 C Unit Min Typ[1] Max Min Max Min Max VCC = 2.0 V 80 17 - 100 - 120 - ns VCC = 4.5 V 16 6 - 20 - 24 - ns VCC = 6.0 V 14 5 - 17 - 20 - ns VCC = 2.0 V 80 17 - 100 - 120 - ns VCC = 4.5 V 16 6 - 20 - 24 - ns VCC = 6.0 V 14 5 - 17 - 20 - ns VCC = 2.0 V 80 19 - 100 - 120 - ns VCC = 4.5 V 16 7 - 20 - 24 - ns VCC = 6.0 V 14 6 - 17 - 20 - ns 630 700 770 602 798 595 805 s VCC = 2.0 V 35 6 - 45 - 55 - ns VCC = 4.5 V 7 2 - 9 - 11 - ns VCC = 6.0 V 6 2 - 8 - 9 - ns nA LOW; see Figure 8 nB HIGH; see Figure 8 nCD LOW; see Figure 8 nQ and nQ HIGH or LOW; see Figure 8 VCC = 5.0 V; CEXT = 0.1 F; REXT = 10 k trec trtrig recovery time retrigger time REXT external timing resistor CEXT external timing capacitor CPD power dissipation capacitance 74HC_HCT4538 Product data sheet nCD to nA, nB; see Figure 8 nA, nB; see Figure 8; X = CEXT / (4.5 VCC) VCC = 2.0 V - 455 + X - - - - - ns VCC = 4.5 V - 80 + X - - - - - ns VCC = 6.0 V - 55 + X - - - - - ns VCC = 2.0 V 10 - 1000 - - - - k VCC = 5.0 V 2 - 1000 - - - - k - - - pF no limits per multivibrator; VI = GND to VCC [3] - 136 - All information provided in this document is subject to legal disclaimers. Rev. 4 -- 24 February 2016 - (c) Nexperia B.V. 2017. All rights reserved 10 of 24 74HC4538; 74HCT4538 Nexperia Dual retriggerable precision monostable multivibrator Table 7. Dynamic characteristics ...continued Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 9. Symbol Parameter 25 C Conditions 40 C to +85 C 40 C to +125 C Unit Min Typ[1] Max Min Max Min Max VCC = 4.5 V - 35 60 - 75 - 90 ns VCC = 5.0 V; CL = 15 pF - 30 - - - - - ns - 35 60 - 75 - 90 ns VCC = 4.5 V - 35 60 - 75 - 90 ns VCC = 5.0 V; CL = 15 pF - 30 - - - - - ns - 35 60 - 75 - 90 ns - 7 15 - 19 - 21 ns 20 11 - 25 - 30 - ns 16 5 - 20 - 24 - ns 20 11 - 25 - 30 - ns 630 700 770 602 798 595 805 s 7 2 - 9 - 11 - ns VCC = 4.5 V - 80 + X - - - - - ns 2 - 1000 - - - - k 74HCT4538 tPLH LOW to HIGH propagation delay nA, nB to nQ; see Figure 7 nCD to nQ; see Figure 7 VCC = 4.5 V tPHL HIGH to LOW propagation delay nA, nB to nQ; see Figure 7 nCD to nQ; see Figure 7 VCC = 4.5 V tt transition time nQ and nQ; see Figure 7 VCC = 4.5 V tW pulse width [2] nA LOW; see Figure 8 VCC = 4.5 V nB HIGH; see Figure 8 VCC = 4.5 V nCD LOW; see Figure 8 VCC = 4.5 V nQ and nQ HIGH or LOW; see Figure 8 VCC = 5.0 V; CEXT = 0.1 F; REXT = 10 k trec recovery time nCD to nA, nB; see Figure 8 trtrig retrigger time nA, nB; see Figure 8; X = CEXT / (4.5 VCC) VCC = 4.5 V REXT external timing resistor VCC = 5.0 V CEXT external timing capacitor VCC = 5.0 V 74HC_HCT4538 Product data sheet no limits All information provided in this document is subject to legal disclaimers. Rev. 4 -- 24 February 2016 (c) Nexperia B.V. 2017. All rights reserved 11 of 24 74HC4538; 74HCT4538 Nexperia Dual retriggerable precision monostable multivibrator Table 7. Dynamic characteristics ...continued Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 9. Symbol Parameter CPD 25 C Conditions power dissipation capacitance per multivibrator; VI = GND to VCC 1.5 V [3] 40 C to +85 C 40 C to +125 C Min Typ[1] Max Min Max Min Max - 138 - - - - - [1] Typical values are measured at nominal supply voltage (VCC = 3.3 V and VCC = 5.0 V). [2] tt is the same as tTHL and tTLH. [3] CPD is used to determine the dynamic power dissipation (PD in W). Unit pF PD = CPD VCC2 fi + (CL VCC2 fo) + 0.48 CEXT VCC2 fo + D 0.8 VCC where: fi = input frequency in MHz; fo = output frequency in MHz; (CL VCC2 fo) = sum of the outputs; CL = output load capacitance in pF; VCC = supply voltage in V; D = duty cycle factor in %; CEXT = external timing capacitance in pF. 11. Waveforms 9, Q%LQSXW *1' 90 W: 9, Q$LQSXW 90 *1' W: 9, Q&'LQSXW *1' 90 W3/+ 92+ Q4RXWSXW 90 92/ W3+/ W3/+ 9< 9; W7+/ W3+/ 90 W3+/ W7/+ 92+ Q4RXWSXW W3/+ 9< 90 9; 92/ DDN Measurement points are given in Table 8. Logic levels: VOL and VOH are typical output levels that occur with the output load. Fig 7. Waveforms showing propagation delays and transition times 74HC_HCT4538 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 -- 24 February 2016 (c) Nexperia B.V. 2017. All rights reserved 12 of 24 74HC4538; 74HCT4538 Nexperia Dual retriggerable precision monostable multivibrator 9, Q&'LQSXW 90 *1' WUHF W: W: 9, Q$LQSXW 90 *1' W: 9, Q%LQSXW 90 *1' WUWULJ 92+ Q4Q4RXWSXW 90 92/ W: DDN Measurement points are given in Table 8. Logic levels: VOL and VOH are typical output levels that occur with the output load. Fig 8. Waveforms showing nA, nB, nQ, nQ pulse widths, recovery and retrigger times Table 8. Measurement points Type Input Output VM VM VX VY 74HC4538 0.5VCC 0.5VCC 0.1VCC 0.9VCC 74HCT4538 1.3 V 1.3 V 0.1VCC 0.9VCC 74HC_HCT4538 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 -- 24 February 2016 (c) Nexperia B.V. 2017. All rights reserved 13 of 24 74HC4538; 74HCT4538 Nexperia Dual retriggerable precision monostable multivibrator 9, W: QHJDWLYH SXOVH 90 9 9, WI WU WU WI SRVLWLYH SXOVH 9 90 90 90 W: 9&& 9&& * 9, 92 5/ 6 RSHQ '87 &/ 57 DDG Test data is given in Table 9. Definitions test circuit: RT = Termination resistance should be equal to output impedance Zo of the pulse generator. CL = Load capacitance including jig and probe capacitance. RL = Load resistance. S1 = Test selection switch Fig 9. Test circuit for measuring switching times Table 9. Test data Type Input VI tr, tf CL RL tPHL, tPLH 74HC4538 VCC 6 ns 15 pF, 50 pF 1 k open 74HCT4538 3V 6 ns 15 pF, 50 pF 1 k open 74HC_HCT4538 Product data sheet Load All information provided in this document is subject to legal disclaimers. Rev. 4 -- 24 February 2016 S1 position (c) Nexperia B.V. 2017. All rights reserved 14 of 24 74HC4538; 74HCT4538 Nexperia Dual retriggerable precision monostable multivibrator 12. Application information 12.1 Power-down considerations A large capacitor (CEXT) may cause problems when powering-down the monostable due to energy stored in this capacitor. When a system containing this device is powered-down or rapid decrease of VCC to zero occurs, the monostable may sustain damage, due to the capacitor discharging through the input protection diodes. To avoid this possibility, use a damping diode (DEXT) preferably a germanium or Schottky type diode able to withstand large current surges and connect as shown in Figure 10 '(;7 &(;7 5(;7 *1' Q&(;7 9&& Q5(;7&(;7 DDN Fig 10. Power-down protection circuit 12.2 Graphs DDN N N N N 0 QRUPDOL]HG .IDFWRU . 5(;7i &(;7 W: &(;7 ) VCC = 4.5 V; Tamb = 25 C. Fig 11. Typical pulse width accuracy versus external capacitance 74HC_HCT4538 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 -- 24 February 2016 (c) Nexperia B.V. 2017. All rights reserved 15 of 24 74HC4538; 74HCT4538 Nexperia Dual retriggerable precision monostable multivibrator DDN QRUPDOL]HG .IDFWRU . 5(;7i &(;7 W: Q) !Q) 5(;7 VCC = 4.5 V; Tamb = 25 C. Fig 12. Typical pulse width accuracy versus external resistance DDN QRUPDOL]HG .IDFWRU . 5(;7i &(;7 W: 5(;7 &(;7 ) VCC = 4.5 V; REXT = 10 k; Tamb = 25 C. Fig 13. Typical pulse width accuracy versus external capacitance DDN QRUPDOL]HG .IDFWRU . N N 5(;7i &(;7 W: N N 0 9&& 9 CEXT = 1 nF; Tamb = 25 C. Fig 14. Typical pulse width accuracy versus power supply 74HC_HCT4538 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 -- 24 February 2016 (c) Nexperia B.V. 2017. All rights reserved 16 of 24 74HC4538; 74HCT4538 Nexperia Dual retriggerable precision monostable multivibrator DDN QRUPDOL]HG .IDFWRU . 5(;7i &(;7 W: N N N 0 9&& 9 CEXT = 100 nF; Tamb = 25 C. Fig 15. Typical pulse width accuracy versus power supply DDN N QRUPDOL]HG .IDFWRU . 5(;7i &(;7 W: N N 0 7DPE & VCC = 4.5 V; CEXT = 1 nF; Tamb = 25 C. Fig 16. Typical pulse width accuracy versus temperature DDN QRUPDOL]HG .IDFWRU . 5(;7i &(;7 W: N N N 0 7DPE & VCC = 4.5 V; CEXT = 1 F; Tamb = 25 C. Fig 17. Typical pulse width accuracy versus temperature 74HC_HCT4538 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 -- 24 February 2016 (c) Nexperia B.V. 2017. All rights reserved 17 of 24 74HC4538; 74HCT4538 Nexperia Dual retriggerable precision monostable multivibrator 13. Package outline 62SODVWLFVPDOORXWOLQHSDFNDJHOHDGVERG\ZLGWKPP 627 ' ( $ ; F \ +( Y 0 $ = 4 $ $ $ $ SLQLQGH[ /S / H Z 0 ES GHWDLO; PP VFDOH ',0(16,216 LQFKGLPHQVLRQVDUHGHULYHGIURPWKHRULJLQDOPPGLPHQVLRQV 81,7 $ PD[ $ $ $ ES F ' ( H +( / /S 4 Y Z \ = PP LQFKHV R R 1RWH 3ODVWLFRUPHWDOSURWUXVLRQVRIPP LQFK PD[LPXPSHUVLGHDUHQRWLQFOXGHG 5()(5(1&(6 287/,1( 9(56,21 ,(& -('(& 627 ( 06 -(,7$ (8523($1 352-(&7,21 ,668('$7( Fig 18. Package outline SOT109-1 (SO16) 74HC_HCT4538 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 -- 24 February 2016 (c) Nexperia B.V. 2017. All rights reserved 18 of 24 74HC4538; 74HCT4538 Nexperia Dual retriggerable precision monostable multivibrator 6623SODVWLFVKULQNVPDOORXWOLQHSDFNDJHOHDGVERG\ZLGWKPP ' 627 ( $ ; F \ +( Y 0 $ = 4 $ $ $ $ SLQLQGH[ /S / GHWDLO; Z 0 ES H PP VFDOH ',0(16,216 PPDUHWKHRULJLQDOGLPHQVLRQV 81,7 $ PD[ $ $ $ ES F ' ( H +( / /S 4 Y Z \ = PP R R 1RWH 3ODVWLFRUPHWDOSURWUXVLRQVRIPPPD[LPXPSHUVLGHDUHQRWLQFOXGHG 287/,1( 9(56,21 627 5()(5(1&(6 ,(& -('(& -(,7$ (8523($1 352-(&7,21 ,668('$7( 02 Fig 19. Package outline SOT338-1 (SSOP16) 74HC_HCT4538 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 -- 24 February 2016 (c) Nexperia B.V. 2017. All rights reserved 19 of 24 74HC4538; 74HCT4538 Nexperia Dual retriggerable precision monostable multivibrator 76623SODVWLFWKLQVKULQNVPDOORXWOLQHSDFNDJHOHDGVERG\ZLGWKPP ' 627 ( $ ; F \ +( Y 0 $ = 4 $ SLQLQGH[ $ $ $ /S / H GHWDLO; Z 0 ES PP VFDOH ',0(16,216 PPDUHWKHRULJLQDOGLPHQVLRQV 81,7 $ PD[ $ $ $ ES F ' ( H +( / /S 4 Y Z \ = PP R R 1RWHV 3ODVWLFRUPHWDOSURWUXVLRQVRIPPPD[LPXPSHUVLGHDUHQRWLQFOXGHG 3ODVWLFLQWHUOHDGSURWUXVLRQVRIPPPD[LPXPSHUVLGHDUHQRWLQFOXGHG 287/,1( 9(56,21 627 5()(5(1&(6 ,(& -('(& -(,7$ (8523($1 352-(&7,21 ,668('$7( 02 Fig 20. Package outline SOT403-1 (TSSOP16) 74HC_HCT4538 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 -- 24 February 2016 (c) Nexperia B.V. 2017. All rights reserved 20 of 24 74HC4538; 74HCT4538 Nexperia Dual retriggerable precision monostable multivibrator 14. Abbreviations Table 10. Abbreviations Acronym Description CMOS Complementary Metal-Oxide Semiconductor DUT Device Under Test ESD ElectroStatic Discharge HBM Human Body Model MM Machine Model TTL Transistor-Transistor Logic 15. Revision history Table 11. Revision history Document ID Release date Data sheet status Change notice Supersedes 74HC_HCT4538 v.4 20160224 Product data sheet - 74HC_HCT4538 v.3 Modifications: 74HC_HCT4538 v.3 Modifications: * Type numbers 74HC4538N and 74HCT4538N (SOT38-4) removed. 20090608 Product data sheet - 74HC_HCT4538_CNV v.2 * The format of this data sheet has been redesigned to comply with the new identity guidelines of NXP Semiconductors. * * * Legal texts have been adapted to the new company name where appropriate. * * * Test circuit added: Figure 9. Pin names changed throughout. Section Section 7, Section 8 and Section 9 added, taken from the 74HC/T HCMOS Family characteristics/specification (March 1988). Quick reference data incorporated in to Section 9 and Section 10. Package information added for DIP16, SO16, SSOP16 and TSSOP16 packages. 74HC_HCT4538_CNV v.2 19970902 74HC_HCT4538 Product data sheet Product specification - All information provided in this document is subject to legal disclaimers. Rev. 4 -- 24 February 2016 - (c) Nexperia B.V. 2017. All rights reserved 21 of 24 74HC4538; 74HCT4538 Nexperia Dual retriggerable precision monostable multivibrator 16. Legal information 16.1 Data sheet status Document status[1][2] Product status[3] Definition Objective [short] data sheet Development This document contains data from the objective specification for product development. Preliminary [short] data sheet Qualification This document contains data from the preliminary specification. Product [short] data sheet Production This document contains the product specification. [1] Please consult the most recently issued document before initiating or completing a design. [2] The term `short data sheet' is explained in section "Definitions". [3] The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status information is available on the Internet at URL http://www.nexperia.com. 16.2 Definitions Draft -- The document is a draft version only. The content is still under internal review and subject to formal approval, which may result in modifications or additions. Nexperia does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information. Short data sheet -- A short data sheet is an extract from a full data sheet with the same product type number(s) and title. A short data sheet is intended for quick reference only and should not be relied upon to contain detailed and full information. For detailed and full information see the relevant full data sheet, which is available on request via the local Nexperia sales office. In case of any inconsistency or conflict with the short data sheet, the full data sheet shall prevail. Product specification -- The information and data provided in a Product data sheet shall define the specification of the product as agreed between Nexperia and its customer, unless Nexperia and customer have explicitly agreed otherwise in writing. In no event however, shall an agreement be valid in which the Nexperia product is deemed to offer functions and qualities beyond those described in the Product data sheet. 16.3 Disclaimers Limited warranty and liability -- Information in this document is believed to be accurate and reliable. However, Nexperia does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. Nexperia takes no responsibility for the content in this document if provided by an information source outside of Nexperia. In no event shall Nexperia be liable for any indirect, incidental, punitive, special or consequential damages (including - without limitation - lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. Notwithstanding any damages that customer might incur for any reason whatsoever, Nexperia's aggregate and cumulative liability towards customer for the products described herein shall be limited in accordance with the Terms and conditions of commercial sale of Nexperia. Right to make changes -- Nexperia reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. This document supersedes and replaces all information supplied prior to the publication hereof. 74HC_HCT4538 Product data sheet Suitability for use -- Nexperia products are not designed, authorized or warranted to be suitable for use in life support, life-critical or safety-critical systems or equipment, nor in applications where failure or malfunction of a Nexperia product can reasonably be expected to result in personal injury, death or severe property or environmental damage. Nexperia and its suppliers accept no liability for inclusion and/or use of Nexperia products in such equipment or applications and therefore such inclusion and/or use is at the customer's own risk. Applications -- Applications that are described herein for any of these products are for illustrative purposes only. Nexperia makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Customers are responsible for the design and operation of their applications and products using Nexperia products, and Nexperia accepts no liability for any assistance with applications or customer product design. It is customer's sole responsibility to determine whether the Nexperia product is suitable and fit for the customer's applications and products planned, as well as for the planned application and use of customer's third party customer(s). Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products. Nexperia does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer's applications or products, or the application or use by customer's third party customer(s). Customer is responsible for doing all necessary testing for the customer's applications and products using Nexperia products in order to avoid a default of the applications and the products or of the application or use by customer's third party customer(s). Nexperia does not accept any liability in this respect. Limiting values -- Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) will cause permanent damage to the device. Limiting values are stress ratings only and (proper) operation of the device at these or any other conditions above those given in the Recommended operating conditions section (if present) or the Characteristics sections of this document is not warranted. Constant or repeated exposure to limiting values will permanently and irreversibly affect the quality and reliability of the device. Terms and conditions of commercial sale -- Nexperia products are sold subject to the general terms and conditions of commercial sale, as published at http://www.nexperia.com/profile/terms, unless otherwise agreed in a valid written individual agreement. In case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. Nexperia hereby expressly objects to applying the customer's general terms and conditions with regard to the purchase of Nexperia products by customer. No offer to sell or license -- Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication of any license under any copyrights, patents or other industrial or intellectual property rights. All information provided in this document is subject to legal disclaimers. Rev. 4 -- 24 February 2016 (c) Nexperia B.V. 2017. All rights reserved 22 of 24 74HC4538; 74HCT4538 Nexperia Dual retriggerable precision monostable multivibrator Export control -- This document as well as the item(s) described herein may be subject to export control regulations. Export might require a prior authorization from competent authorities. Non-automotive qualified products -- Unless this data sheet expressly states that this specific Nexperia product is automotive qualified, the product is not suitable for automotive use. It is neither qualified nor tested in accordance with automotive testing or application requirements. Nexperia accepts no liability for inclusion and/or use of non-automotive qualified products in automotive equipment or applications. In the event that customer uses the product for design-in and use in automotive applications to automotive specifications and standards, customer (a) shall use the product without Nexperia's warranty of the product for such automotive applications, use and specifications, and (b) whenever customer uses the product for automotive applications beyond Nexperia's specifications such use shall be solely at customer's own risk, and (c) customer fully indemnifies Nexperia for any liability, damages or failed product claims resulting from customer design and use of the product for automotive applications beyond Nexperia's standard warranty and Nexperia's product specifications. Translations -- A non-English (translated) version of a document is for reference only. The English version shall prevail in case of any discrepancy between the translated and English versions. 16.4 Trademarks Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. 17. Contact information For more information, please visit: http://www.nexperia.com For sales office addresses, please send an email to: salesaddresses@nexperia.com 74HC_HCT4538 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 -- 24 February 2016 (c) Nexperia B.V. 2017. All rights reserved 23 of 24 Nexperia 74HC4538; 74HCT4538 Dual retriggerable precision monostable multivibrator 18. Contents 1 2 3 4 5 5.1 5.2 6 7 8 9 10 11 12 12.1 12.2 13 14 15 16 16.1 16.2 16.3 16.4 17 18 (c) General description . . . . . . . . . . . . . . . . . . . . . . 1 Features and benefits . . . . . . . . . . . . . . . . . . . . 1 Ordering information . . . . . . . . . . . . . . . . . . . . . 2 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2 Pinning information . . . . . . . . . . . . . . . . . . . . . . 4 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4 Functional description . . . . . . . . . . . . . . . . . . . 5 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 6 Recommended operating conditions. . . . . . . . 7 Static characteristics. . . . . . . . . . . . . . . . . . . . . 7 Dynamic characteristics . . . . . . . . . . . . . . . . . . 9 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Application information. . . . . . . . . . . . . . . . . . 15 Power-down considerations . . . . . . . . . . . . . . 15 Graphs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 18 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Revision history . . . . . . . . . . . . . . . . . . . . . . . . 21 Legal information. . . . . . . . . . . . . . . . . . . . . . . 22 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 22 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Contact information. . . . . . . . . . . . . . . . . . . . . 23 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Nexperia B.V. 2017. All rights reserved For more information, please visit: http://www.nexperia.com For sales office addresses, please send an email to: salesaddresses@nexperia.com Date of release: 24 February 2016