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74HC245 PDF Datasheet浏览和下载

型号.:
74HC245
PDF下载:
下载PDF文件
内容描述:
八路总线收发器;三态
[Octal bus transceiver; 3-state]
文件大小:
128 K
文件页数:
22 Pages
品牌Logo:
品牌名称:
PHILIPS [ NXP SEMICONDUCTORS ]
PCB Prototype
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74HC245; 74HCT245
Octal bus tranceiver; 3-state
Rev. 03 — 31 January 2005
Product data sheet
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
s
s
s
s
Octal bidirectional bus interface
Non-inverting 3-state outputs
Multiple package options
Complies with JEDEC standard no. 7A
ESD protection:
x
HBM EIA/JESD22-A114-B exceeds 2000 V
x
MM EIA/JESD22-A115-A exceeds 200 V
s
Specified from
−40 °C
to +85
°C
and from
−40 °C
to +125
°C
3. Quick reference data
Table 1:
Quick reference data
GND = 0 V; T
amb
= 25
°
C; t
r
= t
f
= 6 ns.
Symbol
t
PHL
, t
PLH
C
I
C
I/O
C
PD
Parameter
propagation delay
An to Bn or Bn to An
input capacitance
input/output capacitance
power dissipation
capacitance per
transceiver
propagation delay
An to Bn or Bn to An
V
I
= GND to V
CC
Conditions
C
L
= 15 pF;
V
CC
= 5 V
Min
-
-
-
-
Typ
7
3.5
10
30
Max
-
-
-
-
Unit
ns
pF
pF
pF
Type 74HC245
Type 74HCT245
t
PHL
, t
PLH
C
L
= 15 pF;
V
CC
= 5 V
-
10
-
ns