- 您现在的位置：买卖IC网 > PDF目录97045 > SN54F257FKR (TEXAS INSTRUMENTS INC) F/FAST SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, CQCC20 PDF资料下载
参数资料
| 型号： | SN54F257FKR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 编、解码器及复用、解复用 |
| 英文描述： | F/FAST SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, CQCC20 |
| 封装： | CERAMIC, LCC-20 |
| 文件页数： | 1/7页 |
| 文件大小： | 145K |
| 代理商： | SN54F257FKR |
SN54F257, SN74F257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS
WITH 3-STATE OUTPUTS
SDFS065A – D2932, MARCH 1987 – REVISED OCTOBER 1993
Copyright
1993, Texas Instruments Incorporated
2–1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
3-State Outputs Interface Directly With
System Bus
Provides Bus Interface From Multiple
Sources in High-Performance Systems
Package Options Include Plastic
Small-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs
description
The
′F257 is designed to multiplex signals from
4-bit data sources to 4-output data lines in
bus-organized systems. The 3-state outputs will
not load the data lines when the output enable
(OE) input is at a high logic level.
The SN54F257 is characterized for operation over
the full military temperature range of – 55
°C to
125
°C. The SN74F257 is characterized for
operation from 0
°C to 70°C.
FUNCTION TABLE
INPUTS
OUTPUT
OE
A /B
A
B
Y
H
X
Z
L
LL
X
L
LH
X
H
L
HX
L
H
X
H
logic symbol
OE
MUX
2
1A
1
3
1B
EN
15
G1
1
1Y
4
5
2A
6
2B
2Y
7
11
3A
10
3B
3Y
9
14
4A
13
4B
4Y
12
A /B
1
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Pin numbers shown are for the D, J, and N packages.
SN54F257 ...J PACKAGE
SN74F257 ...D OR N PACKAGE
(TOP VIEW)
32
1 20 19
910 11 12 13
4
5
6
7
8
18
17
16
15
14
4A
4B
NC
4Y
3A
1B
1Y
NC
2A
2B
SN54F257 . . . FK PACKAGE
(TOP VIEW)
1A
A/B
NC
3Y
3B
OE
2Y
GND
NC
NC – No internal connection
V
CC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
A /B
1A
1B
1Y
2A
2B
2Y
GND
VCC
OE
4A
4B
4Y
3A
3B
3Y
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.
相关PDF资料 |
PDF描述 |
|---|---|
| SN54F280AJ | F/FAST SERIES, 9-BIT PARITY GENERATOR/CHECKER, COMPLEMENTARY OUTPUT, CDIP14 |
| SN54F30FK | F/FAST SERIES, 8-INPUT NAND GATE, CQCC20 |
| SN54F323J | F/FAST SERIES, 8-BIT BIDIRECTIONAL PARALLEL IN PARALLEL OUT SHIFT REGISTER, TRUE OUTPUT, CDIP20 |
| SNJ54F323FK | F/FAST SERIES, 8-BIT BIDIRECTIONAL PARALLEL IN PARALLEL OUT SHIFT REGISTER, TRUE OUTPUT, CQCC20 |
| SN54F350FK | F/FAST SERIES, 4-BIT SHIFTER, CQCC20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SN54F257J | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SN54F27J | 制造商:Texas Instruments 功能描述:NOR Gate 3-Element 3-IN Bipolar 14-Pin CDIP Tube |
| SN54F280BJ | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SN54F283J | 制造商:Texas Instruments 功能描述:Binary Full Adder Single 4-Bit 16-Pin CDIP Tube 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述:BINARY FULL ADDER SGL 4BIT 16CDIP - Rail/Tube |
| SN54F32J | 制造商:Texas Instruments 功能描述:OR Gate 4-Element 2-IN Bipolar 14-Pin CDIP Tube 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述:QUAD 2-INPUT OR GATE - Rail/Tube |
发布紧急采购，3分钟左右您将得到回复。