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SN74BCT2953

更新时间： 2024-11-14 12:50:43
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 92K
描述
OCTAL BUS TRANSCEIVER AND REGISTER WITH 3-STATE OUTPUTS

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SN74BCT2953 数据手册

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SCBS105B − DECEMBER 1990 − REVISED NOVEMBER 1993  
DW OR NT PACKAGE  
(TOP VIEW)  
• State-of-the-Art BiCMOS Design  
Significantly Reduces I  
CCZ  
• ESD Protection Exceeds 2000 V  
B8  
B7  
V
CC  
A8  
1
24  
23  
Per MIL-STD-883C, Method 3015  
2
• Two 8-Bit, Back-to-Back Registers Store  
B6  
B5  
B4  
B3  
B2  
B1  
3
22 A7  
21 A6  
20 A5  
Data Flowing in Both Directions  
4
5
• A Port Sinks 24 mA and Sources 3 mA  
• B Port Sinks 64 mA and Sources 15 mA  
• Inverting Outputs  
6
19  
18  
17  
16  
15  
14  
13  
A4  
A3  
A2  
A1  
OEBA  
CLKBA  
CLKENBA  
7
8
• Package Options Include Plastic  
Small-Outline (DW) Packages and Standard  
Plastic 300-mil DIPs (NT)  
9
OEAB  
CLKAB  
CLKENAB  
GND  
10  
11  
12  
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.  
§
†
logic symbol  
FUNCTION TABLE  
INPUTS  
OUTPUT  
B
15  
OEBA  
EN3  
G1  
CLKENAB CLKAB OEAB  
A
X
X
L
13  
‡
CLKENBA  
H
X
L
X
L
L
L
L
H
B
0
B
0
14  
‡
CLKBA  
1 C5  
H or L  
9
↑
↑
X
H
L
EN4  
G2  
OEAB  
11  
L
H
X
CLKENAB  
10  
X
Z
CLKAB  
2 C6  
†
‡
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.  
8
16  
5D  
4
B1  
3
1
1
A1  
6D  
17  
7
6
5
4
3
2
1
A2  
B2  
B3  
B4  
B5  
B6  
B7  
B8  
18  
A3  
19  
A4  
20  
A5  
21  
A6  
22  
A7  
23  
A8  
§
This symbol is in accordance with ANSI/IEEE Std 91-1984 and  
IEC Publication 617-12.  
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Copyright 1993, 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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SN74BCT29821 TI

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SN74BCT29821DWE4 TI

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 		BCT/FBT SERIES, 10-BIT DRIVER, TRUE OUTPUT, PDSO24, PLASTIC, SO-24
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 		BCT/FBT SERIES, 10-BIT DRIVER, TRUE OUTPUT, PDSO24, PLASTIC, SO-24
SN74BCT29821DWRE4 TI

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 		BCT/FBT SERIES, 10-BIT DRIVER, TRUE OUTPUT, PDSO24, PLASTIC, SO-24
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 		10-BIT BUS-INTERFACE FLIP-FLOP WITH 3-STATE OUTPUTS
SN74BCT29821NTE4 TI

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SN74BCT29822 TI

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 		10-BIT BUS-INTERFACE FLIP-FLOP WITH 3-STATE OUTPUTS

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