74AHCT259 データシートの表示（PDF） - Philips Electronics

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74AHCT259

8-bit addressable latch

Philips Electronics 

Philips Semiconductors

8-bit addressable latch

Product specification

74AHC259;

74AHCT259

QUICK REFERENCE DATA

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

SYMBOL

PARAMETER

CONDITIONS

TYPICAL

UNIT

AHC AHCT

tPHL/tPLH

CI

CO

CPD

propagation delay

D to Qn

An to Qn

LE to Qn

MR to Qn

input capacitance

output capacitance

power dissipation capacitance

CL = 15 pF; VCC = 5 V

4.1 4.1 ns

5.3 5.5 ns

4.3 4.3 ns

3.9 3.9 ns

VI = VCC or GND

3.0 3.0 pF

4.0 4.0 pF

CL = 50 pF; f = 1 MHz; notes 1 and 2 13

17

pF

Notes

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

PD = CPD × VCC2 × fi + ∑ (CL × VCC2 × fo) where:

fi = input frequency in MHz;

fo = output frequency in MHz;

∑ (CL × VCC2 × fo) = sum of outputs;

CL = output load capacitance in pF;

VCC = supply voltage in Volts.

2. The condition is VI = GND to VCC.

2000 Mar 14

3

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