1. General description

The 74AHC123A-Q100; 74AHCT123A-Q100 is a dual retriggerable monostable multivibrator

with reset. The basic output pulse width is programmed by selection of external components

(REXT and CEXT). Once triggered this basic pulse width may be extended by retriggering either

of the edge triggered inputs (nA or (nB). By repeating this process, the output pulse period

(nQ = HIGH, nQ = LOW) can be made as long as desired. Alternatively, an output delay can

be terminated at any time by a LOW-going edge on input nRD. Inputs are overvoltage tolerant.

This feature allows the use of these devices as translators in mixed voltage environments.

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

• Wide supply voltage range from 2.0 V to 5.5 V

• DC triggered from active HIGH or active LOW inputs

• Retriggerable for very long pulses up to 100 duty factor

• Direct reset terminates output pulse

• Overvoltage tolerant inputs to 5.5 V

• All inputs have a Schmitt-trigger action

• High noise immunity

• Input levels:

• For 74AHC123A-Q100: CMOS level

• For 74AHCT123A-Q100: TTL level

• 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 Ω)

• Latch-up performance exceeds 100 mA per JESD 78 Class II Level A

• Multiple package options

• DHVQFN package with Side-Wettable Flanks enabling Automatic Optical Inspection (AOI) of

solder joints