74HC4538; 74HCT4538 Dual retriggerable precision monostable multivibrator Rev. 03 -- 8 June 2009 Product data sheet 1. General description The 74HC4538; 74HCT4538 are high-speed Si-gate CMOS devices and are pin compatible with Low-power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC4538; 74HCT4538 are dual retriggerable-resettable monostable multivibrators. Each multivibrator has an active LOW trigger/retrigger input (nA), an active HIGH trigger/retrigger input (nB), an overriding active LOW direct reset input (nCD), an output (nQ) and its complement (nQ), and two pins (nREXT/CEXT and nCEXT) for connecting the external timing components CEXT and REXT. Typical pulse width variation over the specified temperature range is 0.2 %. The multivibrator 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 (tW) is equal to 0.7 x REXT x 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 on pins nA and nB makes the circuit highly tolerant of slower rise and fall times. 2. Features n n n n n Tolerant of slow trigger rise and fall times Separate reset inputs Triggering from falling or rising edge Multiple package options ESD protection: u HBM JESD22-A114E exceeds 2000 V u MM JESD22-A115-A exceeds 200 V n Specified from -40 C to +85 C and from -40 C to +125 C 74HC4538; 74HCT4538 NXP Semiconductors Dual retriggerable precision monostable multivibrator 3. Ordering information Table 1. Ordering information Type number 74HC4538N Package Temperature range Name Description Version -40 C to +125 C DIP16 plastic dual in-line package; 16-leads (300 mil) SOT38-4 -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 74HCT4538N 74HC4538D 74HCT4538D 74HC4538DB 74HCT4538DB 74HC4538PW 74HCT4538PW SOT338-1 SOT403-1 4. Functional diagram 2 1REXT/CEXT 1 1CEXT 5 1A 4 1B 3 6 1Q 7 2Q 10 2Q 9 1CD 14 2REXT/CEXT 15 2CEXT 11 2A 12 2B 13 1Q 2CD 001aae727 Fig 1. Functional diagram 74HC_HCT4538_3 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 03 -- 8 June 2009 2 of 24 74HC4538; 74HCT4538 NXP Semiconductors Dual retriggerable precision monostable multivibrator nB nA VCC nREXT/CEXT Vref1 enable nCEXT GND nCD power-on reset VCC Vref2 enable nQ nQ mba338 GND Fig 2. Logic diagram (one multivibrator) 74HC_HCT4538_3 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 03 -- 8 June 2009 3 of 24 74HC4538; 74HCT4538 NXP Semiconductors Dual retriggerable precision monostable multivibrator 5. Pinning information 5.1 Pinning 74HC4538 74HCT4538 1CEXT 1 16 VCC 1REXT/CEXT 2 15 2CEXT 1CD 3 14 2REXT/CEXT 74HC4538 74HCT4538 1CEXT 1 1REXT/CEXT 2 16 VCC 15 2CEXT 1B 4 13 2CD 1CD 3 14 2REXT/CEXT 1A 5 12 2B 1B 4 13 2CD 11 2A 1A 5 12 2B 1Q 6 11 2A 1Q 7 10 2Q GND 8 1Q 1Q GND 6 10 2Q 7 9 8 2Q 001aak190 Fig 3. 9 2Q 001aak191 Pin configuration for DIP16 and 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_3 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 03 -- 8 June 2009 4 of 24 74HC4538; 74HCT4538 NXP Semiconductors 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. (1) (1) (2) (1) nB input (3) nA input (4) nCD input nREXT/CEXT input Vref2 Vref1 Vref1 Vref2 nQ output T T T (5) 001aae737 (1) Positive edge triggering. (2) Positive edge re-triggering (pulse lengthening). (3) Negative edge triggering. (4) Reset (pulse shortening). (5) T = 0.7 x REXT x CEXT (see also Figure 6). Fig 5. Timing diagram 74HC_HCT4538_3 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 03 -- 8 June 2009 5 of 24 74HC4538; 74HCT4538 NXP Semiconductors Dual retriggerable precision monostable multivibrator CEXT REXT VCC GND nCEXT nREXT/CEXT nA nB nQ T nQ T = 0.7 x REXT x CEXT nCD Fig 6. 001aak192 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 IIK input clamping current VI < -0.5 V or VI > VCC + 0.5 V IOK output clamping current VO < -0.5 V or VO > VCC + 0.5 V IO output current VO = -0.5 V to VCC + 0.5 V ICC supply current IGND ground current Tstg storage temperature Ptot total power dissipation Min Max Unit -0.5 +7.0 V [1] - 20 mA [1] - 20 mA - 25 mA - +50 mA -50 - mA -65 +150 C Tamb = -40 C to +125 C DIP16 package [2] - 750 mW SO16 package [3] - 500 mW (T)SSOP16 package [4] - 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 12 mW/K above 70 C. [3] Ptot derates linearly with 8 mW/K above 70 C. [4] Ptot derates linearly with 5.5 mW/K above 60 C. 74HC_HCT4538_3 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 03 -- 8 June 2009 6 of 24 74HC4538; 74HCT4538 NXP Semiconductors 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 74HC4538 VIH VIL VOH VOL II HIGH-level input voltage 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 LOW-level input voltage 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 HIGH-level output voltage LOW-level output voltage input leakage current VI = VIH or VIL VI = VIH or VIL 74HC_HCT4538_3 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 03 -- 8 June 2009 7 of 24 74HC4538; 74HCT4538 NXP Semiconductors 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 CI [1] input capacitance This measurement can only be carried out after a trigger pulse is applied. 74HC_HCT4538_3 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 03 -- 8 June 2009 8 of 24 74HC4538; 74HCT4538 NXP Semiconductors 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 -40 C to +125 C Min Typ[1] Max Min Max 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 nQ and nQ; see Figure 7 [2] 74HC_HCT4538_3 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 03 -- 8 June 2009 9 of 24 74HC4538; 74HCT4538 NXP Semiconductors 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 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 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 nCD to nA, nB; see Figure 8 nA, nB; see Figure 8; X = CEXT / (4.5 x VCC) no limits per multivibrator; VI = GND to VCC [3] - 136 74HC_HCT4538_3 Product data sheet - - (c) NXP B.V. 2009. All rights reserved. Rev. 03 -- 8 June 2009 10 of 24 74HC4538; 74HCT4538 NXP Semiconductors 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 x VCC) VCC = 4.5 V REXT external timing resistor VCC = 5.0 V CEXT external timing capacitor VCC = 5.0 V no limits 74HC_HCT4538_3 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 03 -- 8 June 2009 11 of 24 74HC4538; 74HCT4538 NXP Semiconductors 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). PD = CPD x VCC2 x fi x (CL x VCC2 x fo) + 0.48 x CEXT x VCC2 x fo + D x 0.8 x VCC where: fi = input frequency in MHz; fo = output frequency in MHz; (CL x VCC2 x 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. Unit pF 11. Waveforms VI nB input GND VM tW VI nA input VM GND tW VI nCD input GND VM tPLH VOH nQ output VM VOL tPHL tPLH VY VX tTHL tPHL VM tPHL tTLH VOH nQ output tPLH VY VM VX VOL 001aak194 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_3 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 03 -- 8 June 2009 12 of 24 74HC4538; 74HCT4538 NXP Semiconductors Dual retriggerable precision monostable multivibrator VI nCD input VM GND trec tW tW VI nA input VM GND tW VI nB input VM GND trtrig VOH VM nQ, nQ output VOL tW 001aak195 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_3 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 03 -- 8 June 2009 13 of 24 74HC4538; 74HCT4538 NXP Semiconductors Dual retriggerable precision monostable multivibrator VI tW 90 % negative pulse VM 0V tf tr tr tf VI 90 % positive pulse 0V VM 10 % VM VM 10 % tW VCC VCC G VI VO RL S1 open DUT RT CL 001aad983 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 Load S1 position 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_3 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 03 -- 8 June 2009 14 of 24 74HC4538; 74HCT4538 NXP Semiconductors 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 DEXT CEXT REXT VCC GND nCEXT nREXT/CEXT 001aak193 Fig 10. Power-down protection circuit 12.2 Graphs 001aak196 1.6 1 k 2 k 5.6 k 51 k 1 M normalized K factor (K) 1.12 REXT x CEXT (tW) 1.2 0.84 1.0 0.70 0.8 0.56 0.6 10-10 10-9 10-8 10-7 10-6 0.42 10-4 10-5 CEXT (F) VCC = 4.5 V; Tamb = 25 C. Fig 11. Typical pulse width accuracy versus external capacitance 74HC_HCT4538_3 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 03 -- 8 June 2009 15 of 24 74HC4538; 74HCT4538 NXP Semiconductors Dual retriggerable precision monostable multivibrator 001aak197 1.6 1.12 REXT x CEXT (tW) normalized K factor (K) 1.2 0.84 1 nF 1.0 0.70 > 100 nF 0.8 0.56 0.6 103 104 0.42 106 105 REXT () VCC = 4.5 V; Tamb = 25 C. Fig 12. Typical pulse width accuracy versus external resistance 001aak198 1.6 1.12 REXT x CEXT (tW) normalized K factor (K) 1.2 0.84 +10 % REXT 1.0 0.70 -10 % 0.8 0.56 0.6 10-10 10-9 10-8 10-7 10-6 0.42 10-4 10-5 CEXT (F) VCC = 4.5 V; REXT = 10 k; Tamb = 25 C. Fig 13. Typical pulse width accuracy versus external capacitance 001aak199 1.7 normalized K factor (K) 2 k 1 k 1.19 REXT x CEXT (tW) 5.6 k 1.3 0.91 10 k 1.1 0.77 1 M 0.9 0.63 0.7 0.49 1 2 3 4 5 6 VCC (V) CEXT = 1 nF; Tamb = 25 C. Fig 14. Typical pulse width accuracy versus power supply 74HC_HCT4538_3 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 03 -- 8 June 2009 16 of 24 74HC4538; 74HCT4538 NXP Semiconductors Dual retriggerable precision monostable multivibrator 001aak200 1.7 1.19 REXT x CEXT (tW) normalized K factor (K) 1 k 1.3 0.91 2 k 5.6 k 1 M 1.1 0.77 0.9 0.63 0.7 0.49 1 2 3 4 5 6 VCC (V) CEXT = 100 nF; Tamb = 25 C. Fig 15. Typical pulse width accuracy versus power supply 001aak201 1.7 REXT x CEXT (tW) 1 k normalized K factor (K) 2 k 1.3 1.19 0.91 5.6 k 1.1 0.77 1 M 0.9 0.7 -50 0.63 0 50 0.49 150 100 Tamb (C) VCC = 4.5 V; CEXT = 1 nF; Tamb = 25 C. Fig 16. Typical pulse width accuracy versus temperature 001aak202 1.7 1.19 REXT x CEXT (tW) normalized K factor (K) 1.3 0.91 1.1 0.77 1 k 2 k 5.6 k 1 M 0.9 0.7 -50 0 50 0.63 0.49 150 100 Tamb (C) VCC = 4.5 V; CEXT = 1 F; Tamb = 25 C. Fig 17. Typical pulse width accuracy versus temperature 74HC_HCT4538_3 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 03 -- 8 June 2009 17 of 24 74HC4538; 74HCT4538 NXP Semiconductors Dual retriggerable precision monostable multivibrator 13. Package outline DIP16: plastic dual in-line package; 16 leads (300 mil) SOT38-4 ME seating plane D A2 A A1 L c e Z w M b1 (e 1) b b2 MH 9 16 pin 1 index E 1 8 0 5 10 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 min. A2 max. b b1 b2 c D (1) E (1) e e1 L ME MH w Z (1) max. mm 4.2 0.51 3.2 1.73 1.30 0.53 0.38 1.25 0.85 0.36 0.23 19.50 18.55 6.48 6.20 2.54 7.62 3.60 3.05 8.25 7.80 10.0 8.3 0.254 0.76 inches 0.17 0.02 0.13 0.068 0.051 0.021 0.015 0.049 0.033 0.014 0.009 0.77 0.73 0.26 0.24 0.1 0.3 0.14 0.12 0.32 0.31 0.39 0.33 0.01 0.03 Note 1. Plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included. OUTLINE VERSION REFERENCES IEC JEDEC JEITA EUROPEAN PROJECTION ISSUE DATE 95-01-14 03-02-13 SOT38-4 Fig 18. Package outline SOT38-4 (DIP16) 74HC_HCT4538_3 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 03 -- 8 June 2009 18 of 24 74HC4538; 74HCT4538 NXP Semiconductors Dual retriggerable precision monostable multivibrator SO16: plastic small outline package; 16 leads; body width 3.9 mm SOT109-1 D E A X c y HE v M A Z 16 9 Q A2 A (A 3) A1 pin 1 index Lp 1 L 8 e 0 detail X w M bp 2.5 5 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (1) e HE L Lp Q v w y Z (1) mm 1.75 0.25 0.10 1.45 1.25 0.25 0.49 0.36 0.25 0.19 10.0 9.8 4.0 3.8 1.27 6.2 5.8 1.05 1.0 0.4 0.7 0.6 0.25 0.25 0.1 0.7 0.3 0.01 0.019 0.0100 0.39 0.014 0.0075 0.38 0.039 0.016 0.028 0.020 inches 0.010 0.057 0.069 0.004 0.049 0.16 0.15 0.05 0.244 0.041 0.228 0.01 0.01 0.028 0.004 0.012 o 8 o 0 Note 1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included. REFERENCES OUTLINE VERSION IEC JEDEC SOT109-1 076E07 MS-012 JEITA EUROPEAN PROJECTION ISSUE DATE 99-12-27 03-02-19 Fig 19. Package outline SOT109-1 (SO16) 74HC_HCT4538_3 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 03 -- 8 June 2009 19 of 24 74HC4538; 74HCT4538 NXP Semiconductors Dual retriggerable precision monostable multivibrator SSOP16: plastic shrink small outline package; 16 leads; body width 5.3 mm D SOT338-1 E A X c y HE v M A Z 9 16 Q A2 A (A 3) A1 pin 1 index Lp L 8 1 detail X w M bp e 0 2.5 5 mm scale DIMENSIONS (mm are the original dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (1) e HE L Lp Q v w y Z (1) mm 2 0.21 0.05 1.80 1.65 0.25 0.38 0.25 0.20 0.09 6.4 6.0 5.4 5.2 0.65 7.9 7.6 1.25 1.03 0.63 0.9 0.7 0.2 0.13 0.1 1.00 0.55 8 o 0 o Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT338-1 REFERENCES IEC JEDEC JEITA EUROPEAN PROJECTION ISSUE DATE 99-12-27 03-02-19 MO-150 Fig 20. Package outline SOT338-1 (SSOP16) 74HC_HCT4538_3 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 03 -- 8 June 2009 20 of 24 74HC4538; 74HCT4538 NXP Semiconductors Dual retriggerable precision monostable multivibrator TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm SOT403-1 E D A X c y HE v M A Z 9 16 Q (A 3) A2 A A1 pin 1 index Lp L 1 8 e detail X w M bp 0 2.5 5 mm scale DIMENSIONS (mm are the original dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (2) e HE L Lp Q v w y Z (1) mm 1.1 0.15 0.05 0.95 0.80 0.25 0.30 0.19 0.2 0.1 5.1 4.9 4.5 4.3 0.65 6.6 6.2 1 0.75 0.50 0.4 0.3 0.2 0.13 0.1 0.40 0.06 8 o 0 o Notes 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. 2. Plastic interlead protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT403-1 REFERENCES IEC JEDEC JEITA EUROPEAN PROJECTION ISSUE DATE 99-12-27 03-02-18 MO-153 Fig 21. Package outline SOT403-1 (TSSOP16) 74HC_HCT4538_3 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 03 -- 8 June 2009 21 of 24 74HC4538; 74HCT4538 NXP Semiconductors 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 LSTTL Low-power Schottky Transistor-Transistor Logic 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_3 20090608 Product data sheet - 74HC_HCT4538_CNV_2 Modifications: 74HC_HCT4538_CNV_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. 19970902 Product specification 74HC_HCT4538_3 Product data sheet - - (c) NXP B.V. 2009. All rights reserved. Rev. 03 -- 8 June 2009 22 of 24 74HC4538; 74HCT4538 NXP Semiconductors 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.nxp.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. NXP Semiconductors 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 NXP Semiconductors sales office. In case of any inconsistency or conflict with the short data sheet, the full data sheet shall prevail. 16.3 Disclaimers General -- Information in this document is believed to be accurate and reliable. However, NXP Semiconductors 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. Right to make changes -- NXP Semiconductors 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. Suitability for use -- NXP Semiconductors products are not designed, authorized or warranted to be suitable for use in medical, military, aircraft, space or life support equipment, nor in applications where failure or malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage. NXP Semiconductors accepts no liability for inclusion and/or use of NXP Semiconductors 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. NXP Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Limiting values -- Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) may cause permanent damage to the device. Limiting values are stress ratings only and operation of the device at these or any other conditions above those given in the Characteristics sections of this document is not implied. Exposure to limiting values for extended periods may affect device reliability. Terms and conditions of sale -- NXP Semiconductors products are sold subject to the general terms and conditions of commercial sale, as published at http://www.nxp.com/profile/terms, including those pertaining to warranty, intellectual property rights infringement and limitation of liability, unless explicitly otherwise agreed to in writing by NXP Semiconductors. In case of any inconsistency or conflict between information in this document and such terms and conditions, the latter will prevail. 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. 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 national authorities. 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.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com 74HC_HCT4538_3 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 03 -- 8 June 2009 23 of 24 NXP Semiconductors 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 General description . . . . . . . . . . . . . . . . . . . . . . 1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Revision history . . . . . . . . . . . . . . . . . . . . . . . . 22 Legal information. . . . . . . . . . . . . . . . . . . . . . . 23 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 23 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Contact information. . . . . . . . . . . . . . . . . . . . . 23 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Please be aware that important notices concerning this document and the product(s) described herein, have been included in section `Legal information'. (c) NXP B.V. 2009. All rights reserved. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com Date of release: 8 June 2009 Document identifier: 74HC_HCT4538_3