74HCT4538PW-Q100,1 Nexperia

74HCT4538-Q100 Dual retriggerable precision monostable multivibrator Rev. 4 11 February 2021 Product data sheet 1. General description 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 C and R . Typical pulse width variation over temperature EXT EXT 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 C and R . The output pulse width (T ) is equal to 0.7 R C . EXT EXT W EXT EXT 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 V . CC 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 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 3. Ordering information Table 1. Ordering information Type number Package Temperature range Name Description Version 74HCT4538D-Q100 -40 C to +125 C SO16 plastic small outline package 16 leads SOT109-1 body width 3.9 mm 74HCT4538PW-Q100 -40 C to +125 C TSSOP16 plastic thin shrink small outline package 16 leads SOT403-1 body width 4.4 mmNexperia 74HCT4538-Q100 Dual retriggerable precision monostable multivibrator 4. Functional diagram 2 1REXT/CEXT 1 1CEXT 1Q 6 5 1A 4 1B 1Q 7 3 1CD 14 2REXT/CEXT 15 2CEXT 2Q 10 11 2A 12 2B 2Q 9 13 2CD 001aae727 Fig. 1. Functional diagram nB nA V CC nREXT/CEXT V enable ref1 nCEXT GND nCD power-on reset V ref2 V CC enable nQ nQ mba338 GND Fig. 2. Logic diagram (one multivibrator) 74HCT4538 Q100 All information provided in this document is subject to legal disclaimers. Nexperia B.V. 2021. All rights reserved Product data sheet Rev. 4 11 February 2021 2 / 16