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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： | 6/7页 |
| 文件大小： | 145K |
| 代理商： | SN54F257FKR |
Product Folder: SN74F257, Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs
PRODUCT SUPPORT: TRAINING
SN74F257, Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs
DEVICE STATUS: ACTIVE
PARAMETER NAME SN74F257
Voltage Nodes (V) 5
Vcc range (V)
4.5 to 5.5
Input Level
TTL
Output Level
TTL
Output Drive (mA) -3/24
Output
3S
From
2
To
1
FEATURES
q
3-State Outputs Interface Directly With System Bus
q
Provides Bus Interface From Multiple Sources in High-Performance Systems
q
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 (
)
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.
TECHNICAL DOCUMENTS
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DATASHEET
APPLICATION NOTES
View Application Notes for Digital Logic
file:///H|/imaging/BITTING/cpl/20020930_1/09272002_10/TXII/09272002_HTML/sn74f257.html (1 of 2) [Oct-04-2002 9:24:30 AM]
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