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SN74ABTH25245 PDF预览

SN74ABTH25245

更新时间： 2024-11-04 22:35:35
品牌 Logo 应用领域
德州仪器 - TI 总线收发器输出元件
页数 文件大小 规格书
8页 133K
描述
25-W OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

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SN74ABTH25245 数据手册

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SN54ABTH25245, SN74ABTH25245  
25-Ω OCTAL BUS TRANSCEIVERS  
WITH 3-STATE OUTPUTS  
SCBS251F – JUNE 1992 – REVISED MAY 1997  
SN54ABTH25245 . . . JT PACKAGE  
SN74ABTH25245 . . . DW OR NT PACKAGE  
(TOP VIEW)  
State-of-the-Art EPIC-ΙΙB BiCMOS Design  
Significantly Reduces Power Dissipation  
ESD Protection Exceeds 2000 V Per  
MIL-STD-883, Method 3015; Exceeds 200 V  
Using Machine Model (C = 200 pF, R = 0)  
A1  
GND  
A2  
A3  
GND  
A4  
A5  
GND  
A6  
DIR  
B1  
B2  
1
2
3
4
5
6
7
8
9
24  
23  
22  
21  
20  
19  
18  
17  
16  
Latch-Up Performance Exceeds 500 mA Per  
JEDEC Standard JESD-17  
V
CC  
B3  
B4  
B5  
B6  
Typical V  
(Output Ground Bounce) < 1 V  
OLP  
at V  
= 5 V, T = 25°C  
CC  
A
High-Impedance State During Power Up  
and Power Down  
V
CC  
Designed to Facilitate Incident-Wave  
Switching for Line Impedances of 25 Ω or  
Greater  
A7 10  
15 B7  
GND  
A8  
B8  
OE  
11  
12  
14  
13  
Distributed V  
Minimizes High-Speed Switching Noise  
and GND Pin Configuration  
CC  
SN54ABTH25245 . . . FK PACKAGE  
(TOP VIEW)  
Bus Hold on Data Inputs Eliminates the  
Need for External Pullup/Pulldown  
Resistors  
Package Options Include Plastic  
Small-Outline (DW) Package, Ceramic Chip  
Carriers (FK), and Standard Plastic (NT)  
and Ceramic (JT) DIPs  
4
3
2 1 28 27 26  
B3  
5
25 OE  
V
24 A8  
23  
6
CC  
B2  
7
GND  
NC  
A7  
A6  
GND  
22  
21  
20  
19  
NC  
B1  
DIR  
A1  
8
description  
9
The ’ABTH25245 are 25-Ω octal bus transceivers  
designed for asynchronous communication  
between data buses. They improve both the  
performance and density of 3-state memory  
address drivers, clock drivers, and bus-oriented  
transceivers.  
10  
11  
12 13 14 15 16 17 18  
NC – No internal connection  
These devices allow noninverted data  
transmission from the A bus to the B bus or from  
theBbustotheAbus, dependingonthelogiclevel  
at the direction-control (DIR) input. The  
output-enable (OE) input can disable the device  
so that both buses are effectively isolated. When  
OE is low, the device is active.  
These transceivers are capable of sinking 188 mA of I current, which facilitates switching 25-Ω transmission  
OL  
linesontheincidentwave. ThedistributedV andGNDpinsminimizeswitchingnoiseformore-reliablesystem  
CC  
operation.  
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.  
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.  
EPIC-ΙΙB is a trademark of Texas Instruments Incorporated.  
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.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
12345678

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