1.

General description

The 74HC245; 74HCT245 is a high-speed Si-gate CMOS device and is pin compatible

with Low-Power Schottky TTL (LSTTL).

The 74HC245; 74HCT245 is an octal transceiver featuring non-inverting 3-state bus

compatible outputs in both send and receive directions. The 74HC245; 74HCT245

features an output enable input (OE) for easy cascading and a send/receive input (DIR)

for direction control. OE controls the outputs so that the buses are effectively isolated.

The 74HC245; 74HCT245 is similar to the 74HC640; 74HCT640 but has true

(non-inverting) outputs.

2.

Features

s Octal bidirectional bus interface

s Non-inverting 3-state outputs

s Multiple package options

s Complies with JEDEC standard no. 7A

s ESD protection:

x HBM EIA/JESD22-A114-B exceeds 2000 V

x MM EIA/JESD22-A115-A exceeds 200 V

s Specified from

−40 °Cto+85 °C and from −40 °C to +125 °C

3.

Quick reference data

74HC245; 74HCT245

Octal bus tranceiver; 3-state

Rev. 03 — 31 January 2005

Product data sheet

Table 1:

Quick reference data

GND = 0 V; Tamb =25 °C; tr =tf = 6 ns.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Type 74HC245

tPHL, tPLH

propagation delay

An to Bn or Bn to An

CL =15pF;

VCC =5V

-7

-ns

CI

input capacitance

-

3.5

-

pF

CI/O

input/output capacitance

-

10

-

pF

CPD

power dissipation

capacitance per

transceiver

VI = GND to VCC

[1] -30

-

pF

Type 74HCT245

tPHL, tPLH

propagation delay

An to Bn or Bn to An

CL =15pF;

VCC =5V

-10

-

ns