參數(shù)資料
型號： SN74ABT2953
廠商： Texas Instruments, Inc.
英文描述： Octal Bus Transceivers And Registers With 3-State Outputs(八總線收發(fā)器和寄存器(三態(tài)輸出))
中文描述： 八路總線收發(fā)器和寄存器具有三態(tài)輸出（八總線收發(fā)器和寄存器（三態(tài)輸出））
文件頁數(shù)： 1/8頁
文件大小： 166K
代理商： SN74ABT2953
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B8
B7
B6
B5
B4
B3
B2
B1
OEAB
CLKAB
CLKENAB
GND
V
CC
A8
A7
A6
A5
A4
A3
A2
A1
OEBA
CLKBA
CLKENBA
SN54ABT2953 . . . JT PACKAGE
SN74ABT2953 . . . DB, DW, OR NT PACKAGE
(TOP VIEW)
C
C
G
N
C
C
O
B
N
A
V
B
B
A
C
3 2 1 28 27
12 13 14 15 16 1718
5
6
7
8
9
10
11
25
24
23
22
21
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19
A6
A5
A4
NC
A3
A2
A1
B5
B4
B3
NC
B2
B1
OEAB
4
26
SN54ABT2953 . . . FK PACKAGE
(TOP VIEW)
NC – No internal connection
SN54ABT2953, SN74ABT2953
OCTAL BUS TRANSCEIVERS AND REGISTERS
WITH 3-STATE OUTPUTS
SCBS467 – FEBRUARY 1991 – REVISED OCTOBER 1992
Copyright
1994, Texas Instruments Incorporated
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
State-of-the-Art EPIC-
ΙΙ
B
BiCMOS Design
Significantly Reduces Power Dissipation
ESD Protection Exceeds 2000 V Per
MIL-STD-883C, Method 3015; Exceeds
200 V Using Machine Model (C = 200 pF,
R = 0)
Latch-Up Performance Exceeds 500 mA
Per JEDEC Standard JESD-17
Two 8-Bit, Back-to-Back Registers Store
Data Flowing in Both Directions
Inverting Outputs
Typical V
OLP
(Output Ground Bounce) < 1 V
at V
CC
= 5 V, T
A
= 25
°
C
Package Options Include Plastic
Small-Outline (DW) and Shrink
Small-Outline (DB) Packages, Ceramic Chip
Carriers (FK), and Standard Plastic and
Ceramic 300-mil DIPs (JT, NT)
description
The
′
ABT2953 consists of 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 accesses the data on
either port.
To ensure the high-impedance state during power
up or power down, OE should be tied to V
CC
through a pullup resistor; the minimum value of the
resistor is determined by the current-sinking
capability of the driver.
The SN74ABT2953 is packaged in TI’s shrink small-outline package (DB), which provides the same I/O pin
count and functionality of standard small-outline packages in less than half the printed-circuit-board area.
The SN54ABT2953 is characterized for operation over the full military temperature range of –55
°
C to 125
°
C.
The SN74ABT2953 is characterized for operation from –40
°
C to 85
°
C.
EPIC-
ΙΙ
B is a trademark of Texas Instruments Incorporated.
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
P
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