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
a73 Octal bidirectional bus interface
a73 Non-inverting 3-state outputs
a73 Multiple package options
a73 Complies with JEDEC standard no. 7A
a73 ESD protection:
a78 HBM EIA/JESD22-A114-B exceeds 2000 V
a78 MM EIA/JESD22-A115-A exceeds 200 V
a73 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; T
amb
=25°C; t
r
=t
f
= 6 ns.
Symbol Parameter Conditions Min Typ Max Unit
Type 74HC245
t
PHL
, t
PLH
propagation delay
An to Bn or Bn to An
C
L
=15pF;
V
CC
=5V
-7-ns
C
I
input capacitance - 3.5 - pF
C
I/O
input/output capacitance - 10 - pF
C
PD
power dissipation
capacitance per
transceiver
V
I
= GND to V
CC
[1]
-30-pF
Type 74HCT245
t
PHL
, t
PLH
propagation delay
An to Bn or Bn to An
C
L
=15pF;
V
CC
=5V
-10-ns