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參數(shù)資料
| 型號： | SN54HCT623 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Octal Bus Transceivers With 3-State Outputs(八總線收發(fā)器(三態(tài)輸出)) |
| 中文描述： | 八路總線收發(fā)器與三態(tài)輸出（八總線收發(fā)器（三態(tài)輸出）） |
| 文件頁數(shù)： | 1/6頁 |
| 文件大?。?/td> | 148K |
| 代理商： | SN54HCT623 |
SN54HCT623, SN74HCT623
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCLS016B – MARCH 1984 – REVISED MAY 1997
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Inputs Are TTL-Voltage Compatible
Lock Bus-Latch Capability
True Logic
High-Current 3-State Outputs Can Drive up
to 15 LSTTL Loads
Package Options Include Plastic
Small-Outline (DW) and Ceramic Flat (W)
Packages, Ceramic Chip Carriers (FK), and
Standard Plastic (N) and Ceramic (J)
300-mil DIPs
description
These octal bus transceivers are designed for
asynchronous two-way communication between
data buses. The control-function implementation
allows for maximum flexibility in timing.
The ’HCT623 allow data transmission from the
A bus to the B bus or from the B bus to the A bus,
depending upon the logic levels at the
output-enable (OEAB and OEBA) inputs.
The output-enable inputs disable the device so
that the buses are effectively isolated. The
dual-enable configuration gives the transceivers
the capability to store data by simultaneously
enabling OEAB and OEBA. Each output
reinforces
its
input
configuration. When both OEAB and OEBA are
enabled and all other data sources to the two sets
of bus lines are in the high-impedance state, both
sets of bus lines (16 total) remain at their last
states. The 8-bit codes appearing on the two sets
of buses are identical.
in
this
transceiver
The SN54HCT623 is characterized for operation over the full military temperature range of –55
°
C to 125
°
C. The
SN74HCT623 is characterized for operation from –40
°
C to 85
°
C.
FUNCTION TABLE
INPUTS
OPERATION
OEBA
OEAB
L
L
B data to A bus
H
H
A data to B bus
H
L
Isolation
L
H
B data to A bus,
A data to B bus
Copyright
1997, Texas Instruments Incorporated
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information current as of publication date. Products conform to
specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all
parameters.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SN54HCT623 . . . J OR W PACKAGE
SN74HCT623 . . . DW OR N PACKAGE
(TOP VIEW)
SN54HCT623 . . . FK PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OEAB
A1
A2
A3
A4
A5
A6
A7
A8
GND
V
CC
OEBA
B1
B2
B3
B4
B5
B6
B7
B8
3
2 1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
B1
B2
B3
B4
B5
A3
A4
A5
A6
A7
A
A
O
B
B
V
O
A
G
B
C
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