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参数资料
| 型号： | SN74LS257BMR1 |
| 厂商： | ON SEMICONDUCTOR |
| 元件分类： | 编、解码器及复用、解复用 |
| 英文描述： | LS SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO16 |
| 封装： | EIAJ, SOP-16 |
| 文件页数： | 5/8页 |
| 文件大小： | 223K |
| 代理商： | SN74LS257BMR1 |
SN74LS257B, SN74LS258B
http://onsemi.com
5
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Symbol
Parameter
Limits
Unit
Test Conditions
Min
Typ
Max
VIH
Input HIGH Voltage
2.0
V
Guaranteed Input HIGH Voltage for
All Inputs
VIL
Input LOW Voltage
0.8
V
Guaranteed Input LOW Voltage for
All Inputs
VIK
Input Clamp Diode Voltage
0.65
1.5
V
VCC = MIN, IIN = 18 mA
VOH
Output HIGH Voltage
2.4
3.1
V
VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table
VOL
Output LOW Voltage
0.25
0.4
V
IOL = 12 mA
VCC = VCC MIN,
VIN = VIL or VIH
per Truth Table
0.35
0.5
V
IOL = 24 mA
IOZH
Output Off Current — HIGH
20
μA
VCC = MAX, VOUT = 2.7 V
IOZL
Output Off Current — LOW
20
μA
VCC = MAX, VOUT = 0.4 V
IIH
Input HIGH Current
Other Inputs
S Inputs
20
40
μA
VCC = MAX, VIN = 2.7 V
Other Inputs
S Inputs
0.1
0.2
mA
VCC = MAX, VIN = 7.0 V
IIL
Input LOW Current
All Inputs
0.4
mA
VCC = MAX, VIN = 0.4 V
IOS
Short Circuit Current (Note 2)
30
130
mA
VCC = MAX
ICC
Power Supply Current
Total, Output HIGH
LS257B
LS258B
10
9.0
mA
VCC = MAX
Total, Output LOW
LS257B
LS258B
16
14
mA
Total, Output 3-State
LS257B
LS258B
19
16
mA
2. Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V) See SN74LS251 for Waveforms
Symbol
Parameter
Limits
Unit
Test Conditions
Min
Typ
Max
tPLH
tPHL
Propagation Delay, Data to Output
10
12
13
15
ns
Figures 1 & 2
CL = 45 pF
tPLH
tPHL
Propagation Delay, Select to Output
14
21
ns
Figures 1 & 2
tPZH
Output Enable Time to HIGH Level
20
25
ns
Figures 4 & 5
CL = 45 pF
RL = 667 Ω
tPZL
Output Enable Time to LOW Level
20
25
ns
Figures 3 & 5
tPLZ
Output Disable Time to LOW Level
16
25
ns
Figures 3 & 5
CL = 5.0 pF
RL = 667 Ω
tPHZ
Output Disable Time from HIGH Level
18
25
ns
Figures 4 & 5
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| SN54LS257AJD | LS SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, CDIP16 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SN74LS257BN | 功能描述:编码器、解码器、复用器和解复用器 Quad Data RoHS:否 制造商:Micrel 产品:Multiplexers 逻辑系列:CMOS 位数: 线路数量（输入/输出）:2 / 12 传播延迟时间:350 ps, 400 ps 电源电压-最大:2.625 V, 3.6 V 电源电压-最小:2.375 V, 3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Tray |
| SN74LS257BN | 制造商:Texas Instruments 功能描述:MULTIPLEXER IC |
| SN74LS257BN3 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SN74LS257BNE4 | 功能描述:编码器、解码器、复用器和解复用器 Quad 2-to-1 Data Slct/Mltpx W/3St Otp RoHS:否 制造商:Micrel 产品:Multiplexers 逻辑系列:CMOS 位数: 线路数量（输入/输出）:2 / 12 传播延迟时间:350 ps, 400 ps 电源电压-最大:2.625 V, 3.6 V 电源电压-最小:2.375 V, 3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Tray |
| SN74LS257BNS | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
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