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SN74BCT2953 Datasheet(PDF) 1 Page - Texas Instruments

Part No. SN74BCT2953
Description  OCTAL BUS TRANSCEIVER AND REGISTER WITH 3-STATE OUTPUTS
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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SN74BCT2953 Datasheet(HTML) 1 Page - Texas Instruments

   
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B8
B7
B6
B5
B4
B3
B2
B1
OEAB
CLKAB
CLKENAB
GND
VCC
A8
A7
A6
A5
A4
A3
A2
A1
OEBA
CLKBA
CLKENBA
DW OR NT PACKAGE
(TOP VIEW)
SN74BCT2953
OCTAL BUS TRANSCEIVER AND REGISTER
WITH 3STATE OUTPUTS
SCBS105B − DECEMBER 1990 − REVISED NOVEMBER 1993
Copyright
1993, Texas Instruments Incorporated
2−1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251−1443
State-of-the-Art BiCMOS Design
Significantly Reduces ICCZ
ESD Protection Exceeds 2000 V
Per MIL-STD-883C, Method 3015
Two 8-Bit, Back-to-Back Registers Store
Data Flowing in Both Directions
A Port Sinks 24 mA and Sources 3 mA
B Port Sinks 64 mA and Sources 15 mA
Inverting Outputs
Package Options Include Plastic
Small-Outline (DW) Packages and Standard
Plastic 300-mil DIPs (NT)
description
The SN74BCT2953 octal bus transceiver contains two 8-bit back-to-back registers that store data flowing in
both directions between two bidirectional buses. Data on the A or B bus is stored in the registers on the
low-to-high transition of the clock (CLKAB or CLKBA) input provided that the clock-enable (CLKENAB or
CLKENBA) input is low. Taking the output-enable (OEAB or OEBA) input low allows access of the data on the
output port (B port or A port).
The SN74BCT2953 is characterized for operation from 0
°C to 70°C.
FUNCTION TABLE†
INPUTS
OUTPUT
CLKENAB
CLKAB
OEAB
A
OUTPUT
B
H
X
L
X
B0‡
X
H or L
L
X
B0‡
L
LL
H
L
LH
L
X
X
H
X
Z
† A-to-B data flow is shown; B-to-A data flow is similar but
uses CLKENBA, CLKBA, and OEBA.
‡ Level of B before the indicated steady-state input
conditions were established.
PRODUCTION DATA information is 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.
logic symbol§
§ This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
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B1
8
5D
A1
16
A2
17
A3
18
A4
19
EN3
15
1 C5
B2
7
B3
6
B4
5
A5
20
A6
21
A7
22
A8
23
B5
4
B6
3
B7
2
B8
1
G2
11
G1
13
EN4
9
2 C6
4
1
6D
OEBA
CLKENBA
OEAB
CLKENAB
14
CLKBA
10
CLKAB


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