74AHCT259 datasheet(3/20 Pages) PHILIPS

3 / 20 page

2000 Mar 14

Philips Semiconductors

Product speciﬁcation

8-bit addressable latch

74AHC259;

74AHCT259

QUICK REFERENCE DATA

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

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.

SYMBOL

PARAMETER

CONDITIONS

TYPICAL

UNIT

AHC

AHCT

tPHL/tPLH

propagation delay

DtoQn

CL = 15 pF; VCC = 5 V

4.1

An to Qn

5.3

5.5

LE to Qn

4.3

MR to Qn

3.9

input capacitance

VI =VCC or GND

3.0

output capacitance

4.0

CPD

power dissipation capacitance

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

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