參數(shù)資料
型號(hào)： HD74HC643
廠商： Hitachi,Ltd.
英文描述： Octal Bus Transceivers (with 3-state outputs)
中文描述： 八路總線收發(fā)器（3態(tài)輸出）
文件頁數(shù)： 1/11頁
文件大?。?/td> 69K
代理商： HD74HC643
HD74HC640/HD74HC643
Octal Bus Transceivers (with 3-state outputs)
Description
Each device has an active enable
G
and a direction control input, DIR. when DIR is high, data flows from
the A inputs to the B outputs. When DIR is low, data flows from the B inputs to the A outputs. The
HD74HC640 transfers inverted data from one bus to other and the HD74HC643 transfers inverted data
from the A bus to the B bus and true data from the B bus to the A bus.
Features
High Speed Operation: t
pd
= 12 ns typ (C
L
= 50 pF)
High Output Current: Fanout of 15 LSTTL Loads
Wide Operating Voltage: V
CC
= 2 to 6 V
Low Input Current: 1 μA max
Low Quiescent Supply Current: I
CC
(static) = 4 μA max (Ta = 25°C)
Function Table
Control Inputs
G
Operation
DIR
HD74HC640
B
data to A bus
A
data to B bus
HD74HC643
L
L
B data to A bus
A
data to B bus
L
H
H
X
Isolation
Isolation
相關(guān)PDF資料
PDF描述
HD74HC646 Octal Bus Transceivers/Registers with Multiplexed 3-state outputs
HD74HC648 Octal Bus Transceivers/Registers with Multiplexed 3-state outputs
HD74HC651 8-Bit Universal Shift/Storage Registers With 3-State Outputs 20-CDIP -55 to 125
HD74HC652 Octal Bus Transceivers/Registers(with inverted 3-state outputs)
HD74HC668 Synchronous UP/Down Decade,4-bit binary Counter
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