74AHC123A 查看數據表（PDF） - Philips Electronics

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74AHC123A

Dual retriggerable monostable multivibrator with reset

Philips Electronics 

Philips Semiconductors

Dual retriggerable monostable multivibrator

with reset

Product specification

74AHC123A;

74AHCT123A

QUICK REFERENCE DATA

GND = 0 V; Tamb = 25 °C; tr = tf ≤ 3.0 ns.

SYMBOL

PARAMETER

CONDITIONS

tPHL/tPLH

CI

CO

CPD

propagation delay

nA, nB to nQ, nQ

nRD to nQ, nQ

input capacitance

output capacitance

power dissipation capacitance

CL = 15 pF; VCC = 5 V;

REXT = 5 kΩ; CEXT = 0 pF

VI = VCC or GND

CL = 50 pF; f = 1 MHz; notes 1

and 2

Notes

1. CPD is used to determine the dynamic power dissipation (PD in µW).

PD = CPD × VCC2 × fi + ∑ (CL × VCC2 × fo) × CEXT × VCC2 × fo + D × 16 × VCC where:

fi = input frequency in MHz;

fo = output frequency in MHz;

∑ (CL × VCC2 × fo) = sum of outputs;

D = duty factor in %;

CL = output load capacitance in pF;

CEXT = timing capacitance in pF;

VCC = supply voltage in Volts.

2. The condition is VI = GND to VCC.

TYPICAL

UNIT

AHC AHCT

5.1 5.0 ns

5.6 5.2 ns

5

3 pF

4

4 pF

57

58 pF

2000 Mar 15

3

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