DESCRIPTION

· The MC74HC4538A is a dual precision monostable multivibrator, retriggerable and resettable, identical in pinout to the MC14538B.

· Inputs are compatible with standard CMOS outputs and, with pullup resistors, with LSTTL outputs.

· Can be triggered by either the positive or negative edge of an input pulse, producing a precision output pulse over a wide range of widths.

· Output pulse width is determined by external timing components, R x and C x.

· Features a reset function that forces the Q output low and the Q output high, regardless of the state of the output pulse circuitry.

FEATURES

· Unlimited rise and fall times allowed on the trigger inputs.

· Output pulse is independent of the trigger pulse width.

· ±10% guaranteed pulse width variation from part to part using the same test jig.

· Output drive capability: 10 LSTTL loads.

· Outputs directly interface to CMOS, NMOS, and TTL.

· Operating voltage range: 3.0 to 6.0 V.

· Low input current: 1.0 µA.

· High noise immunity characteristic of CMOS devices.

· In compliance with JEDEC Standard No. 7A.

· Chip complexity: 145 FETs or 36 equivalent gates.

· Pb-Free packages available.

APPLICATIONS

· Precision timing and pulse generation in digital systems.

· Interface and signal conditioning in mixed-signal environments.

· Noise-sensitive applications due to high noise immunity.

· Systems requiring retriggerable and resettable monostable multivibrators.

· Applications with varying input signal rise and fall times.