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參數(shù)資料
| 型號： | SN54F257J |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Replaced by BQ4015 : 256Kx8 Nonvolatile SRAM, 5% Voltage Tolerance 32-DIP MODULE 0 to 70 |
| 中文描述： | 四2線1線數(shù)據(jù)選擇器/多路復(fù)用3態(tài)輸出 |
| 文件頁數(shù)： | 2/5頁 |
| 文件大小： | 74K |
| 代理商： | SN54F257J |
SN54F257, SN74F257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS
WITH 3-STATE OUTPUTS
SDFS065A – D2932, MARCH 1987 – REVISED OCTOBER 1993
2–2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
logic diagram (positive logic)
4Y
3Y
2Y
1Y
A/B
OE
4B
4A
3B
3A
2B
2A
1B
1A
4
2
3
7
5
6
9
11
10
12
14
13
1
15
Pin numbers shown are for the D, J, and N packages.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
CC
Input voltage range (see Note 1)
Input current range
Voltage range applied to any output in the disabled or power-off state
Voltage range applied to any output in the high state
Current into any output in the low state: SN54F257
–0.5 V to 7 V
–1.2 V to 7 V
–30 mA to 5 mA
–0.5 V to 5.5 V
–0.5 V to V
CC
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40 mA
48 mA
SN74F257
SN54F257
SN74F257
Operating free-air temperature range:
–55
°
C to 125
°
C
0
°
C to 70
°
C
–65
°
C to 150
°
C
Storage temperature range
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: The input voltage ratings may be exceeded provided the input current ratings are observed.
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|---|---|
| SN54F258 | Replaced by BQ4015Y : 256KX8 NONVOLATILE SRAM, 10% VOLTAGE TOLERANCE 32-DIP MODULE 0 TO 70 |
| SN54F258FK | Replaced by BQ4015Y : 256Kx8 Nonvolatile SRAM, 10% Voltage Tolerance 32-DIP MODULE 0 to 70 |
| SN54F258J | 512Kx8 Nonvolatile SRAM, 5% Voltage Tolerance 32-DIP MODULE 0 to 70 |
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