74HC243D datasheet(2/17 Pages) PHILIPS

2 / 17 page

9397 750 13808

Product data sheet

Rev. 03 — 12 November 2004

2 of 17

Philips Semiconductors

74HC243

Quad bus transceiver; 3-state

Quick reference data

[1]

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

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

fi = input frequency in MHz;

fo = output frequency in MHz;

CL = output load capacitance in pF;

VCC = supply voltage in V;

N = number of inputs switching;

∑(C

L × VCC

× f

o) = sum of outputs.

Ordering information

Table 1:

Quick reference data

GND = 0 V; Tamb=25 °C; tr =tf = 6 ns.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

tPHL, tPLH

propagation delay An to Bn;

Bn to An

CL = 15 pF; VCC = 5 V

input capacitance

3.5

CI/O

input/output capacitance

CPD

power dissipation

capacitance per transceiver

VI = GND to VCC

[1] -26

Table 2:

Ordering information

Type number

Package

Temperature range

Name

Description

Version

74HC243N

−40 °C to +125 °C

DIP14

plastic dual in-line package; 14 leads (300 mil)

SOT27-1

74HC243D

−40 °C to +125 °C

SO14

plastic small outline package; 14 leads;

body width 3.9 mm

SOT108-1

74HC243DB

−40 °C to +125 °C

SSOP14

plastic shrink small outline package; 14 leads;

body width 5.3 mm

SOT337-1

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