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參數(shù)資料
| 型號(hào)： | SN74LS257D |
| 廠商： | Motorola, Inc. |
| 英文描述： | 5V Fixed Gain Amp, for Applications to 1 GHz |
| 中文描述： | 四2輸入多路復(fù)用器與三態(tài)輸出 |
| 文件頁(yè)數(shù)： | 4/6頁(yè) |
| 文件大小： | 182K |
| 代理商： | SN74LS257D |
5-430
FAST AND LS TTL DATA
SN54/74LS257B SN54/74LS258B
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
54
0.7
V
Guaranteed Input LOW Voltage for
All Inputs
74
0.8
VIK
Input Clamp Diode Voltage
–0.65
–1.5
V
VCC = MIN, IIN = –18 mA
VOH
Output HIGH Voltage
54
2.4
3.4
V
or VIL per Truth Table
74
2.4
3.1
V
VCC = MIN, IOH = MAX, VIN = VIH
VOL
Output LOW Voltage
54, 74
0.25
0.4
V
IOL = 12 mA
VCC = VCC MIN,
per Truth Table
74
0.35
0.5
V
IOL = 24 mA
VIN = VIL or VIH
IOZH
IOZL
Output Off Current — HIGH
20
μ
A
VCC = MAX, VOUT = 2.7 V
VCC = MAX, VOUT = 0.4 V
Output Off Current — LOW
–20
μ
A
IIH
Input HIGH Current
Other Inputs
S Inputs
20
40
μ
A
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 1)
–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
Note 1: 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 SN54LS251 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
14
21
21
ns
Figures 1 & 2
tPZH
tPZL
tPLZ
tPHZ
Output Enable Time to HIGH Level
20
25
ns
Figures 4 & 5
RL = 667
Output Enable Time to LOW Level
20
25
ns
Figures 3 & 5
CL = 45 pF
Output Disable Time to LOW Level
16
25
ns
Figures 3 & 5
RL = 667
Output Disable Time from HIGH Level
18
25
ns
Figures 4 & 5
CL = 5.0 pF
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SN74LS257N | QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS |
| SN74LS258BD | LOW POWER SCHOTTKY |
| SN74LS258BN | 3V PA/Driver, +22dBm PSAT, 0.5-6GHz, SOT363(SC-70) |
| SN74LS259 | LOW POWER SCHOTTKY |
| SN74LS259D | LOW POWER SCHOTTKY |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SN74LS257N | 制造商:Motorola Inc 功能描述:LOGIC MUX, QUAD, 2-INPUT, LS-TTL, 16 Pin, Plastic, DIP 制造商:Texas Instruments 功能描述:LOGIC MUX, QUAD, 2-INPUT, LS-TTL, 16 Pin, Plastic, DIP |
| SN74LS258AJ | 制造商:Texas Instruments 功能描述: |
| SN74LS258AJD | 制造商:Motorola Inc 功能描述: |
| SN74LS258AN | 制造商:Motorola Inc 功能描述: 制造商:Motorola Inc 功能描述:LS SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, INVERTED OUTPUT, PDIP16 |
| SN74LS258AND | 制造商:Motorola Inc 功能描述: |
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