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SN54BCT25245_08

更新时间： 2024-09-08 04:31:23
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
5页 100K
描述
OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

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SN54BCT25245_08 数据手册

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SCBS053B − MAY 1990 − REVISED APRIL 1994  
SN54BCT25245 . . . JT OR W PACKAGE  
SN74BCT25245 . . . DW OR NT PACKAGE  
(TOP VIEW)  
• State-of-the-Art BiCMOS Design  
Significantly Reduces I  
CCZ  
• ESD Protection Exceeds 2000 V Per  
MIL-STD-883C, Method 3015; Exceeds  
200 V Using Machine Model (C = 200 pF,  
R = 0)  
A1  
GND  
A2  
DIR  
B1  
B2  
1
2
3
4
5
6
7
8
9
24  
23  
22  
21  
20  
19  
18  
17  
16  
• Designed to Facilitate Incident-Wave  
Switching for Line Impedances of 25 Ω  
or Greater  
A3  
V
CC  
GND  
A4  
A5  
GND  
A6  
B3  
B4  
B5  
B6  
• Distributed V  
and GND Pins Minimize  
Noise Generated by the Simultaneous  
Switching of Outputs  
CC  
V
CC  
A7 10  
15 B7  
• Package Options Include Plastic  
Small-Outline (DW) Packages, Ceramic  
Chip Carriers (FK) and Flatpacks (W), and  
Standard Plastic and Ceramic 300-mil DIPs  
(JT, NT)  
GND  
A8  
B8  
11  
12  
14  
13  
OE  
SN54BCT25245 . . . FK PACKAGE  
(TOP VIEW)  
description  
The ′BCT25245 is a 25-Ω octal bus transceiver  
designed for asynchronous communication  
between data buses. It improves both the  
performance and density of 3-state memory  
address drivers, clock drivers, and bus-oriented  
transceivers.  
4
3 2 1 28 27 26  
B3  
5
6
7
8
9
25 OE  
V
24 A8  
23  
CC  
B2  
GND  
NC  
A7  
A6  
GND  
22  
21  
20  
19  
NC  
B1  
DIR  
A1  
The device allows data transmission from the A  
bus to the B bus or from the B bus to the A bus  
depending upon the logic level at the  
direction-control (DIR) input. The output-enable  
(OE) input can disable the device so that both  
buses are effectively isolated.  
10  
11  
12 13 14 15 16 17 18  
NC − No internal connection  
These transceivers are capable of sinking 188-mA  
I
, which facilitates switching 25-Ω transmission  
OL  
lines on the incident wave. The distributed V  
CC  
and GND pins minimize switching noise for more  
reliable system operation.  
The SN54BCT25245 is characterized for opera-  
tion over the full military temperature range of  
−55°C to 125°C. The SN74BCT25245 is  
characterized for operation from 0°C to 70°C.  
FUNCTION TABLE  
INPUTS  
OPERATION  
DIR  
OE  
L
L
H
X
B data to A bus  
A data to B bus  
Isolation  
L
H
Copyright 1994, Texas Instruments Incorporated  
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2−1  
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443  
12345

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