參數(shù)資料
型號: 74HC_HCT245_CNV_2
廠商: NXP Semiconductors N.V.
英文描述: Octal bus transceiver; 3-state
中文描述: 8個三態(tài)總線收發(fā)器, 3態(tài)
文件頁數(shù): 1/22頁
文件大?。?/td> 130K
代理商: 74HC_HCT245_CNV_2
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 Specied 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
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