74HC4538PW-Q100,11 - NEXPERIA - Datasheet.Directory

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1. General description

The 74HC4538-Q100; 74HCT4 538-Q100 are high- speed Si- ga te CMOS devices an d are

pin compatible with Low-power Schottky TTL (LSTTL). They are specified in compliance

with JEDEC standard no. 7A.

The 74HC4538-Q100; 74HCT4538-Q100 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)

•two pins (nREXT/CEXT and nCEXT) for connecting the external timing components

CEXT and REXT

Typical pulse width variation over the specified tem p er at ur e ra ng e is 0.2 %.

The multivibrator may be triggered by either the positive or the n egative edges of the in put

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 REXT CEXT. The linear design techniques guarant ee precise control of the output

pulse width. A LOW level at nCD terminates the output pulse immed iately. Schmitt trigger

action on pins nA and nB makes the circuit highly tolerant of slower rise and fall times.

This product has been qualified to the Automotive Electronics Council (AEC) standard

Q100 (Grade 1) and is suitable for use in automotive applications.

2. Features and benefits

Automotive product qualification in accordance with AEC-Q100 (Grade 1)

Specified from 40 C to +85 C and from 40 C to +125 C

Tolerant of slow trigger rise and fall times

Separate reset inputs

Triggering from falling or rising edge

ESD protection:

MIL-STD-883, method 3015 exceeds 2000 V

HBM JESD22-A114F exceeds 2000 V

MM JESD22-A115-A exceeds 200 V (C = 200 pF, R = 0 )

Multiple package options

74HC4538-Q100; 74HCT4538-Q100

Dual retriggerable precision monostable multivibrator

Rev. 2 — 23 December 2015 Product data sheet

Product data sheet Rev. 2 — 23 December 2015 2 of 23

NXP Semiconductors 74HC4538-Q100; 74HCT4538-Q100

Dual retriggerable precision monostable multivibrator

3. Ordering information

4. Functional diagram

Table 1. Ordering information

Type number Package

Temperature range Name Description Version

74HC4538D-Q100 40 C to +125 C SO16 plastic small outline package; 16 leads; body width

3.9 mm SOT109-1

74HCT4538D-Q100

74HC4538PW-Q100 40 C to +125 C TSSOP16 plastic thin shrink small outline package; 16 leads;

body width 4.4 mm SOT403-1

74HCT4538PW-Q100

Fig 1. Functional di agram

001aae727

1CEXT

1REXT/CEXT

1CD

2CEXT

2REXT/CEXT

2CD

Product data sheet Rev. 2 — 23 December 2015 3 of 23

NXP Semiconductors 74HC4538-Q100; 74HCT4538-Q100

Dual retriggerable precision monostable multivibrator

Fig 2. Logic diagram (one multi vibra tor)

mba338

Vref2

Vref1

GND

nCEXT

nREXT/CEXT

enable

VCC

power-on reset

VCC

nCD

GND

Product data sheet Rev. 2 — 23 December 2015 4 of 23

NXP Semiconductors 74HC4538-Q100; 74HCT4538-Q100

Dual retriggerable precision monostable multivibrator

5. Pinning information

5.1 Pinning

5.2 Pin description

Fig 3. Pin configuration for SO16 Fig 4. Pin configuration for TSSOP16

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

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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 in pu t (a cti ve 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

Product data sheet Rev. 2 — 23 December 2015 5 of 23

NXP Semiconductors 74HC4538-Q100; 74HCT4538-Q100

Dual retriggerable precision monostable multivibrator

6. Functional description

[1] 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.

Table 3. Function table

Inputs Outputs

nA nB nCD nQ nQ

LH

HH

XXLLH

(1) Positive edge triggering.

(2) Positive edge retriggering (pulse lengthening).

(3) Negative edge triggering.

(4) Reset (pulse shortening).

(5) T = 0.7  REXT  CEXT (see also Figure 6).

Fig 5. Timing diagram

001aae737

(1)

(3)

(5)

(4)

(1)(2)(1)

Vref1

Vref2 Vref2

Vref1

nA input

nB input

nCD input

nREXT/CEXT input

nQ output

Product data sheet Rev. 2 — 23 December 2015 6 of 23

NXP Semiconductors 74HC4538-Q100; 74HCT4538-Q100

Dual retriggerable precision monostable multivibrator

7. Limiting values

[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.

Fig 6. Connection of the external timing components REXT and CEXT

001aak192

nCD

nREXT/CEXT

nCEXT

GND VCC

REXT

CEXT

T = 0.7 × REXT × CEXT

Table 4. Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).

Symbol Parameter Conditions Min Max Unit

VCC supply voltage 0.5 +7.0 V

IIK input clamping current VI < 0.5 V or VI>V

CC +0.5 V [1] -20 mA

IOK output clamping current VO < 0.5 V or VO > VCC + 0.5 V [1] -20 mA

IOoutput current VO = 0.5 V to VCC +0.5V - 25 mA

ICC supply current - +50 mA

IGND ground current 50 - mA

Tstg storage temperature 65 +150 C

Ptot total power dissipation Tamb = 40 C to +125 C

SO16 package [2] - 500 mW

TSSOP16 package [3] - 500 mW

Product data sheet Rev. 2 — 23 December 2015 7 of 23

NXP Semiconductors 74HC4538-Q100; 74HCT4538-Q100

Dual retriggerable precision monostable multivibrator

8. Recommended operating conditions

9. Static characteristics

Table 5. Recommended operating con ditions

Voltages are referenced to GND (ground = 0 V)

Symbol Parameter Conditions 74HC4538-Q100 74HCT4538-Q100 Unit

Min Typ Max Min Typ Max

VCC supply voltage 2.0 5.0 6.0 4.5 5.0 5.5 V

VIinput voltage 0 - VCC 0-V

CC V

VOoutput voltage 0 - VCC 0-V

CC 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

Table 6. Static characteristics

At recommended operating conditions; voltages are referenced to GND (ground = 0 V).

Symbol Parameter Conditions 25 C40 C to +85 C40 C to +125 CUnit

Min Typ Max Min Max Min Max

74HC4538-Q100

VIH 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

VIL 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

VOH HIGH-level

output voltage VI = VIH or VIL

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

VOL LOW-level

output voltage VI = VIH or VIL

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

IIinput leakage

current VI = VCC or GND;

VCC =6.0V --0.1 - 1-1A

pin nREXT/CEXT;

VI= 2.0 V or GND; other

inputs at VCC or GND;

VCC =6.0V

[1]

--0.5 - 5-10 A

Product data sheet Rev. 2 — 23 December 2015 8 of 23

NXP Semiconductors 74HC4538-Q100; 74HCT4538-Q100

Dual retriggerable precision monostable multivibrator

[1] This measurement can only be carried out after a trigger pulse is applied.

ICC supply current VI = VCC or GND; IO=0A;

VCC =6.0V - - 8.0 - 80 - 160 A

CIinput

capacitance -3.5- - - - -pF

74HCT4538-Q100

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

VOL LOW-level

output voltage 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

IIinput leakage

current VI = VCC or GND;

VCC =5.5V --0.1 - 1-1A

pin nREXT/CEXT;

VI= 2.0 V or GND; other

inputs at VCC or GND;

VCC =5.5V

[1]

--0.5 - 5-10 A

ICC supply current VI = VCC or GND; IO=0A;

VCC =5.5V - - 8.0 - 80 - 160 A

ICC additional

supply current VI=V

CC 2.1 V; IO=0A;

other inputs at VCC or GND;

VCC = 4.5 V to 5.5 V

pin nA, nB - 50 180 - 225 - 245 A

pin nCD - 65 234 - 293 - 319 A

CIinput

capacitance -3.5- - - - -pF

Table 6. Static characteristics …continued

At recommended operating conditions; voltages are referenced to GND (ground = 0 V).

Symbol Parameter Conditions 25 C40 C to +85 C40 C to +125 CUnit

Min Typ Max Min Max Min Max

Product data sheet Rev. 2 — 23 December 2015 9 of 23

NXP Semiconductors 74HC4538-Q100; 74HCT4538-Q100

Dual retriggerable precision monostable multivibrator

10. Dynamic characteristics

Table 7. Dynamic characteristics

Vo ltages are referenced to GND (ground = 0 V); for test circuit see Figure 9.

Symbol Parameter Conditions 25 C40 C to

+85 C40 C to

+125 CUnit

Min Typ[1] Max Min Max Min Max

74HC4538-Q100

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=15pF -27-----ns

VCC = 6.0 V - 25 45 - 56 - 68 ns

nCD to nQ; see Figure 7

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

tPHL HIGH to LOW

propagation

delay

nA, nB to nQ;

see Figure 7

VCC = 2.0 V - 83 265 - 330 - 400 ns

VCC = 4.5 V - 30 53 - 66 - 80 ns

VCC = 5.0 V; CL=15pF -27-----ns

VCC = 6.0 V - 24 45 - 56 - 68 ns

nCD to nQ; see Figure 7

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

tttransition time nQ and nQ; see Figure 7 [2]

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

Product data sheet Rev. 2 — 23 December 2015 10 of 23

NXP Semiconductors 74HC4538-Q100; 74HCT4538-Q100

Dual retriggerable precision monostable multivibrator

tWpulse width nA LOW; see Figure 8

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

nB HIGH; see Figure 8

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

nCD LOW; see Figure 8

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

nQ and nQ HIGH or LOW;

see Figure 8

VCC = 5.0 V;

CEXT =0.1F;

REXT =10 k

630 700 770 602 798 595 805 s

trec recovery time nCD to nA, nB;

see Figure 8

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

trtrig retrigger time nA, nB; see Figure 8;

X=C

EXT / (4.5  VCC)

VCC = 2.0 V -455+X-----ns

VCC = 4.5 V -80+X-----ns

VCC = 6.0 V -55+X-----ns

REXT external

resistance VCC = 2.0 V 10-1000----k

VCC = 5.0 V 2 -1000----k

CEXT external

capacitance no limits

CPD power

dissipation

capacitance

per multivibrator;

VI=GNDtoV

[3] -136-----pF

Table 7. Dynamic characteristics …continued

Vo ltages are referenced to GND (ground = 0 V); for test circuit see Figure 9.

Symbol Parameter Conditions 25 C40 C to

+85 C40 C to

+125 CUnit

Min Typ[1] Max Min Max Min Max

74HC_HCT4538_Q100 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet Rev. 2 — 23 December 2015  11 of 23
NXP Semiconductors 74HC4538-Q100; 74HCT4538-Q100
Dual retriggerable precision monostable multivibrator
74HCT4538-Q100
tPLH LOW to HIGH 
propagation 
delay
nA, nB to nQ; 
see Figure 7
VCC = 4.5 V - 35 60 - 75 - 90 ns
VCC = 5.0 V; CL=15pF -30-----ns
nCD to nQ; see Figure 7
VCC = 4.5 V - 35 60 - 75 - 90 ns
tPHL HIGH to LOW 
propagation 
delay
nA, nB to nQ; 
see Figure 7
VCC = 4.5 V - 35 60 - 75 - 90 ns
VCC = 5.0 V; CL=15pF -30-----ns
nCD to nQ; see Figure 7
VCC = 4.5 V - 35 60 - 75 - 90 ns
tttransition time nQ and nQ; see Figure 7 [2]
VCC = 4.5 V - 7 15 - 19 - 21 ns
tWpulse width  nA LOW; see Figure 8
VCC = 4.5 V 20 11 - 25 - 30 - ns
nB HIGH; see Figure 8
VCC = 4.5 V 16 5 - 20 - 24 - ns
nCD LOW; see Figure 8
VCC = 4.5 V 20 11 - 25 - 30 - ns
nQ and nQ HIGH or LOW; 
see Figure 8
VCC = 5.0 V; 
CEXT =0.1F; 
REXT =10 k
630 700 770 602 798 595 805 s
trec recovery time nCD to nA, nB; 
see Figure 8
VCC = 4.5 V 7 2 - 9 - 11 - ns
trtrig retrigger time nA, nB; see Figure 8; 
X=C
EXT / (4.5  VCC)
VCC = 4.5 V -80+X-----ns
REXT external 
resistance VCC = 5.0 V 2 -1000----k
CEXT external 
capacitance VCC = 5.0 V no limits
Table 7. Dynamic characteristics …continued
Vo ltages are referenced to GND (ground = 0 V); for test circuit see Figure 9.
Symbol Parameter Conditions 25 C40 C to 
+85 C40 C to 
+125 CUnit
Min Typ[1] Max Min Max Min Max

Product data sheet Rev. 2 — 23 December 2015 12 of 23

NXP Semiconductors 74HC4538-Q100; 74HCT4538-Q100

Dual retriggerable precision monostable multivibrator

[1] Typical values are measured at nominal supply voltage (VCC = 3.3 V and VCC =5.0V).

[2] tt is the same as tTHL and tTLH.

[3] CPD is used to determine the dynamic power dissipation (PD in W).

PD=C

PD 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

CPD power

dissipation

capacitance

per multivibrator;

VI=GNDto(V

CC 1.5 V) [3] -138-----pF

Table 7. Dynamic characteristics …continued

Vo ltages are referenced to GND (ground = 0 V); for test circuit see Figure 9.

Symbol Parameter Conditions 25 C40 C to

+85 C40 C to

+125 CUnit

Min Typ[1] Max Min Max Min Max

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 de lays and transition times

001aak194

VIVM

tPLH tPLH

tPHL tTHL tTLH tPLH

tPHL

VMVM

nB input

GND

nA input

GND

nCD input

GND

VOH

nQ output

VOL

VOH

nQ output

VOL

Product data sheet Rev. 2 — 23 December 2015 13 of 23

NXP Semiconductors 74HC4538-Q100; 74HCT4538-Q100

Dual retriggerable precision monostable multivibrator

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

001aak195

nCD input

nA input

nB input

rec

rtrig

GND

nQ, nQ output

GND

Table 8. Measurement points

Type Input Output

VMVMVXVY

74HC4538-Q100 0.5VCC 0.5VCC 0.1VCC 0.9VCC

74HCT4538-Q100 1.3 V 1.3 V 0.1VCC 0.9VCC

Product data sheet Rev. 2 — 23 December 2015 14 of 23

NXP Semiconductors 74HC4538-Q100; 74HCT4538-Q100

Dual retriggerable precision monostable multivibrator

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

10 %

90 %

0 V

negative

pulse

positive

pulse

0 V

90 %

10 %

001aad983

DUT

VIVO

RLS1

open

Table 9. Test data

Type Input Load S1 position

VItr, tfCLRLtPHL, tPLH

74HC4538-Q100 VCC 6ns 15pF, 50 pF 1kopen

74HCT4538-Q100 3 V 6 ns 15 pF, 50 pF 1 kopen

Product data sheet Rev. 2 — 23 December 2015 15 of 23

NXP Semiconductors 74HC4538-Q100; 74HCT4538-Q100

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

12.2 Graphs

Fig 10. Power-down protection circuit

001aak193

nREXT/CEXTnCEXT

GND VCC

REXT

DEXT

CEXT

VCC = 4.5 V; Tamb = 25 C.

Fig 11. Typical pulse width accuracy versus external capacitance

001aak196

EXT

(F)

−10

−5

−4

−6

−7

−9

−8

1.0

1.2

0.8

1.6

0.6

normalized

K factor

(K)

0.70

0.84

0.56

1.12

0.42

EXT

)

1 kΩ

2 kΩ

5.6 kΩ

51 kΩ

1 MΩ

Product data sheet Rev. 2 — 23 December 2015 16 of 23

NXP Semiconductors 74HC4538-Q100; 74HCT4538-Q100

Dual retriggerable precision monostable multivibrator

VCC = 4.5 V; Tamb = 25 C.

Fig 12. Typical pulse widt h accuracy versus external resistance

EXT

(Ω)

001aak197

1.0

1.2

0.8

1.6

0.6

0.70

0.84

0.56

1.12

0.42

EXT

)

normalized

K factor

(K)

> 100 nF

1 nF

VCC = 4.5 V; REXT = 10 k; Tamb = 25 C.

Fig 13. Typical pulse widt h accuracy versus external capacitance

001aak198

EXT

(F)

−10

−5

−4

−6

−7

−9

−8

1.0

1.2

0.8

1.6

0.6

normalized

K factor

(K)

0.70

0.84

0.56

1.12

0.42

EXT

)

EXT

+10 %

−10 %

CEXT = 1 nF; Tamb = 25 C.

Fig 14. Typical pulse width accuracy versus power supp ly

(V)

156423

001aak199

0.77

0.91

0.63

1.19

0.49

EXT

)

1.1

1.3

0.9

1.7

0.7

normalized

K factor

(K) 5.6 kΩ

2 kΩ1 kΩ

10 kΩ

1 MΩ

Product data sheet Rev. 2 — 23 December 2015 17 of 23

NXP Semiconductors 74HC4538-Q100; 74HCT4538-Q100

Dual retriggerable precision monostable multivibrator

CEXT = 100 nF; Tamb = 25 C.

Fig 15. Typical pulse width accuracy versus power supp ly

(V)

156423

001aak200

0.77

0.91

0.63

1.19

0.49

EXT

)

1.1

1.3

0.9

1.7

0.7

normalized

K factor

(K)

5.6 kΩ

2 kΩ

1 kΩ

1 MΩ

VCC = 4.5 V; CEXT = 1 nF; Tamb = 25 C.

Fig 16. Typical pulse width accuracy versus temper ature

Tamb (°C)

−50 100 150500

001aak201

0.77

0.91

0.63

1.19

0.49

REXT ×

CEXT

(tW)

1.1

1.3

0.9

1.7

0.7

normalized

K factor

(K)

5.6 kΩ

2 kΩ

1 kΩ

1 MΩ

VCC = 4.5 V; CEXT = 1 F; Tamb = 25 C.

Fig 17. Typical pulse width accuracy versus temper ature

amb

(°C)

−50 100 150500

001aak202

0.77

0.91

0.63

1.19

0.49

EXT

)

1.1

1.3

0.9

1.7

0.7

normalized

K factor

(K)

1 kΩ

2 kΩ

5.6 kΩ

1 MΩ

Product data sheet Rev. 2 — 23 December 2015 18 of 23

NXP Semiconductors 74HC4538-Q100; 74HCT4538-Q100

Dual retriggerable precision monostable multivibrator

13. Package outline

Fig 18. Package outline SOT109-1 (SO16)

detail X

vMA

(A )

pin 1 index

UNIT A

max. A1A2A3bpcD

(1) E(1) (1)

ELL

pQZywv θ

REFERENCES

OUTLINE

VERSION EUROPEAN

PROJECTION ISSUE DATE

IEC JEDEC JEITA

inches

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 0.7

0.6 0.7

0.3 8

0.25 0.1

DIMENSIONS (inch dimensions are derived from the original mm dimensions)

Note

1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.

1.0

0.4

SOT109-1 99-12-27

03-02-19

076E07 MS-012

0.069 0.010

0.004 0.057

0.049 0.01 0.019

0.014 0.0100

0.0075 0.39

0.38 0.16

0.15 0.05

1.05

0.041

0.244

0.228 0.028

0.020 0.028

0.012

0.01

0.25

0.01 0.004

0.039

0.016

0 2.5 5 mm

scale

SO16: plastic small outline package; 16 leads; body width 3.9 mm SOT109-1

Product data sheet Rev. 2 — 23 December 2015 19 of 23

NXP Semiconductors 74HC4538-Q100; 74HCT4538-Q100

Dual retriggerable precision monostable multivibrator

Fig 19. Package outline SOT403-1 (TSSOP16)

UNIT A1A2A3bpcD

(1) E(2) (1)

ELL

pQZywv θ

REFERENCES

OUTLINE

VERSION EUROPEAN

PROJECTION ISSUE DATE

IEC JEDEC JEITA

mm 0.15

0.05 0.95

0.80 0.30

0.19 0.2

0.1 5.1

4.9 4.5

4.3 0.65 6.6

6.2 0.4

0.3 0.40

0.06 8

0.13 0.10.21

DIMENSIONS (mm are the original dimensions)

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.

0.75

0.50

SOT403-1 MO-153 99-12-27

03-02-18

0.25

16 9

detail X

(A )

vMA

0 2.5 5 mm

scale

TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm SOT403-1

max.

1.1

pin 1 index

Product data sheet Rev. 2 — 23 December 2015 20 of 23

NXP Semiconductors 74HC4538-Q100; 74HCT4538-Q100

Dual retriggerable precision monostable multivibrator

14. Abbreviations

15. Revision history

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

MIL Military

Table 11. Revision history

Document ID Release date Data sheet status Change notice Supersedes

74HC_HCT4538_Q100 v.2 20151223 Product data sheet - 74HC_HCT4538_Q100 v.1

Modifications: •CPD formula corrected (errata).

74HC_HCT4538_Q100 v.1 20120802 Product data sheet - -

Product data sheet Rev. 2 — 23 December 2015 21 of 23

NXP Semiconductors 74HC4538-Q100; 74HCT4538-Q100

Dual retriggerable precision monostable multivibrator

16. Legal information

16.1 Data sheet status

[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 de vice(s) descr ibed in th is document m ay have cha nged since thi s document w as publish ed and may di ffe r 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 warrant ies as to t he accuracy or completeness of

information included herein and shall have no liab ility 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 tit le. A short data sh eet is intended

for quick reference only and shou ld not b e relied u pon to cont ain det ailed and

full information. For detailed and full information see the relevant full data

sheet, which is available on request via the local NXP Semicond uctors sales

office. In case of any inconsistency or conflict with the short data sheet, the

full data sheet shall pre va il.

Product specificat io n — The information and data provided in a Product

data sheet shall define the specification of the product as agreed between

NXP Semiconductors and its customer, unless NXP Semiconductors and

customer have explicitly agreed otherwise in writing. In no event however,

shall an agreement be valid in which the NXP Semiconductors product is

deemed to off er functions and qualities beyond those described in the

Product data sheet.

16.3 Disclaimers

Limited warr a nty and liability — Information in this document is believed to

be accurate and reliable. However, NXP Semiconductors does not give any

representations or warrant ies, 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. NXP Se miconductors takes no

responsibility for the content in this document if provided by an information

source outside of NXP Semiconductors.

In no event shall NXP Semiconductors be liable for any indirect , incidental,

punitive, special or consequ ential damages (including - wit hout 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, NXP Semiconductors’ ag gregate and cumulative l iability toward s

customer for the products described herein shall be limited in accordance

with the Terms and conditions of commercial sale of NXP Semiconductor s.

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 informa tion supplied prior

to the publication hereof .

Suitability for use — NXP Semiconductors products are not designed,

authorized or warranted to be suitable for use in life support , life-critical or

safety-critical systems or equipme nt, nor in applications where failure or

malfunction of an NXP Semiconductors pro duct can reasonably be expected

to result in perso nal injury , death or severe property or environment al

damage. NXP Semiconductors and its suppliers accept no liability for

inclusion and/or use of NXP Semiconducto rs products in such equipment or

applications and ther efore such inclu sion and/or use is at the cu stomer’s own

risk.

Applications — Applications that are described herein for any of these

products are for il lustrative purposes only. NXP Semiconductors 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 ope ration of their applications

and products using NXP Semiconductors product s, and NXP Semiconductors

accepts no liability for any assistance with applications or customer product

design. It is customer’s sole responsibility to determine whether the NXP

Semiconductors product is suit able and fit for t he customer’s applications and

products planned, as well as fo r the planned application and use of

customer’s third party customer(s). Custo mers should provide appropriate

design and operating safeguards to minimize the risks associate d with t heir

applications and products.

NXP Semiconductors does not accept any liabili ty 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 custo mer(s). Customer is responsible for doing all necessary

testing for the customer’s applications and products using NXP

Semiconductors products in order to avoid a default of the applications and

the products or of the application or use by cust omer’s third party

customer(s). NXP 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 rating s 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 — NXP Semiconductors

products are sold subject to the general terms and conditions of commercial

sale, as published at http://www.nxp.com/profile/terms, unless otherwise

agreed in a valid written individua l agreement. In case an individual

agreement is concluded only the ter m s and conditions of the respective

agreement shall apply. NXP Semiconductors hereby expressly objects to

applying the customer’s general terms and conditions with regard to the

purchase of NXP Semiconductors products by customer.

No offer to sell or license — Nothing i n this document may be interpreted or

construed as an of fer t o sell product s that is open for accept ance or the gr ant,

conveyance or implication of any license under any copyrights, patents or

other industrial or intellectual property rights.

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] dat a sheet Qualification This document contains data from the preliminary specification.

Product [short] data sheet Production This document contains the product specification.

Product data sheet Rev. 2 — 23 December 2015 22 of 23

NXP Semiconductors 74HC4538-Q100; 74HCT4538-Q100

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 NXP Semiconductors product is automotive qualified,

the product is not suitable for automotive use. It i s neit her qua lif ied nor test ed

in accordance with automotive testing or application requirements. NXP

Semiconductors 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 automot ive specifications and standards, custome r

(a) shall use the product without NXP Semiconductors’ warranty of the

product for such au tomotive applications, use and specifica tions, and (b)

whenever customer uses the product for automotive applications beyond

NXP Semiconductors’ specifications such use shall be solely at customer’s

own risk, and (c) customer fully indemnifies NXP Semiconduct ors for an y

liability, damages or failed produ ct claims r esulting from custome r design and

use of the product for automotive applications beyond NXP Semiconductors’

standard warranty and NXP Semiconductors’ product specif ications.

Translations — A non-English (translated) version of a document is for

reference only. The English version shall prevail in case of any discrep ancy

between the translated and English versions.

16.4 Trademarks

Notice: All referenced b rands, produc t names, service names and trademarks

are the property of their respective ow ners.

17. Contact information

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: salesaddresses@nxp.com

NXP Semiconductors 74HC4538-Q100; 74HCT4538-Q100
Dual retriggerable precision monostable multivibrator
© NXP Semiconductors N.V. 2015. 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: 23 December 2015
Document identifier: 74HC_HCT4538_ Q100
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’. 
Contents
General description. . . . . . . . . . . . . . . . . . . . . .  1
Features and benefits . . . . . . . . . . . . . . . . . . . .  1
Ordering information. . . . . . . . . . . . . . . . . . . . .  2
Functional diagram . . . . . . . . . . . . . . . . . . . . . .  2
Pinning information. . . . . . . . . . . . . . . . . . . . . .  4
1  Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4
2  Pin description . . . . . . . . . . . . . . . . . . . . . . . . .  4
Functional description . . . . . . . . . . . . . . . . . . .  5
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . .  6
Recommended operating conditions. . . . . . . .  7
Static characteristics. . . . . . . . . . . . . . . . . . . . .  7
Dynamic characteristics . . . . . . . . . . . . . . . . . .  9
Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12
Application information. . . . . . . . . . . . . . . . . .  15
1  Power-down considerations . . . . . . . . . . . . . .  15
2  Graphs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  15
Package outline . . . . . . . . . . . . . . . . . . . . . . . .  18
Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . .  20
Revision history. . . . . . . . . . . . . . . . . . . . . . . .  20
Legal information. . . . . . . . . . . . . . . . . . . . . . .  21
1  Data sheet status . . . . . . . . . . . . . . . . . . . . . .  21
2  Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . .  21
3  Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . .  21
4  Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . .  22
Contact information. . . . . . . . . . . . . . . . . . . . .  22
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23