參數(shù)資料
型號(hào)： 74HC245
廠商： NXP Semiconductors N.V.
英文描述： Octal bus transceiver; 3-state
中文描述： 8個(gè)三態(tài)總線收發(fā)器, 3態(tài)
文件頁(yè)數(shù)： 1/22頁(yè)
文件大?。?/td> 130K
代理商： 74HC245
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
I
Octal bidirectional bus interface
I
Non-inverting 3-state outputs
I
Multiple package options
I
Complies with JEDEC standard no. 7A
I
ESD protection:
N
HBM EIA/JESD22-A114-B exceeds 2000 V
N
MM EIA/JESD22-A115-A exceeds 200 V
I
Specified from
40
°
C to +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:
GND = 0 V; T
amb
= 25
°
C; t
r
= t
f
= 6 ns.
Symbol
Parameter
Type 74HC245
t
PHL
, t
PLH
propagation delay
An to Bn or Bn to An
C
I
input capacitance
C
I/O
input/output capacitance
C
PD
power dissipation
capacitance per
transceiver
Type 74HCT245
t
PHL
, t
PLH
propagation delay
An to Bn or Bn to An
Quick reference data
Conditions
Min
Typ
Max
Unit
C
L
= 15 pF;
V
CC
= 5 V
-
7
-
ns
-
-
3.5
10
30
-
-
-
pF
pF
pF
V
I
= GND to V
CC
[1]
-
C
L
= 15 pF;
V
CC
= 5 V
-
10
-
ns
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