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74HCT4538-Q100

Dual retriggerable precision monostable multivibrator

The 74HCT4538-Q100 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 (TW) 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.

This product has been qualified to the Automotive Electronics Council (AEC) standard Q100 (Grade 1) and is suitable for use in automotive applications.

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
  • High noise immunity
  • Separate reset inputs
  • Triggering from falling or rising edge
  • Complies with JEDEC standard no. 7A
  • Wide supply voltage range from 4.5 to 5.5 V
  • CMOS low power dissipation
  • TTL input levels
  • Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
  • ESD protection:
    • MIL-STD-883, method 3015 exceeds 2000 V
    • HBM JESD22-A114F exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V

Parametrics

Type numberProduct statusVCC (V)Logic switching levelsOutput drive capability (mA)tpd (ns)Power dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74HCT4538D-Q100Production4.5 - 5.5TTL± 430low-40~125741.732.8SO16
74HCT4538PW-Q100Production4.5 - 5.5TTL± 430low-40~1251091.037TSSOP16

Package

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74HCT4538D-Q100
SO16
(SOT109-1)
SO-SOJ-REFLOW
WAVE_BG-BD-1
Reel 13" Q1/T1Active74HCT4538D74HCT4538D-Q100,11
( 9352 988 61118 )
74HCT4538PW-Q100
TSSOP16
(SOT403-1)
SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHCT453874HCT4538PW-Q100,1
( 9352 988 62118 )

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
74HCT4538D-Q10074HCT4538D-Q100,1174HCT4538D-Q100Always Pb-free40.01.47.46E811
74HCT4538PW-Q10074HCT4538PW-Q100,174HCT4538PW-Q100Always Pb-free40.01.47.46E811
Quality and reliability disclaimer

Documentation (6)

File nameTitleTypeDate
74HCT4538_Q100Dual retriggerable precision monostable multivibratorData sheet2021-02-11
Nexperia_Selection_guide_2022Nexperia Selection Guide 2022Selection guide2022-01-05
WAVE_BG-BD-1Wave soldering profileWave soldering2021-09-08
SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08

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