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參數(shù)資料
| 型號： | 74LS197 |
| 廠商： | Motorola, Inc. |
| 元件分類： | 通用總線功能 |
| 英文描述： | 4-STAGE PRESETTABLE RIPPLE COUNTERS |
| 中文描述： | 4級預置紋波計數(shù)器 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 227K |
| 代理商： | 74LS197 |
5-375
FAST AND LS TTL DATA
SN54/74LS196
SN54/74LS197
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
Typ
Max
Unit
VCC
Supply Voltage
54
74
4.5
4.75
5.0
5.0
5.5
5.25
V
TA
Operating Ambient Temperature Range
54
74
–55
0
25
25
125
70
°
C
IOH
IOL
Output Current — High
54, 74
–0.4
mA
Output Current — Low
54
74
4.0
8.0
mA
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
2.5
3.5
V
or VIL per Truth Table
74
2.7
3.5
V
VCC = MIN, IOH = MAX, VIN = VIH
VOL
Output LOW Voltage
54, 74
0.25
0.4
V
IOL = 4.0 mA
VCC = VCC MIN,
per Truth Table
74
0.35
0.5
V
IOL = 8.0 mA
VIN = VIL or VIH
IIH
Input HIGH Current
Data, PL
MR, CP0 (LS196)
MR, CP0, CP1 (LS197)
CP1 (LS196)
Data, PL
MR, CP0 (LS196)
MR, CP0, CP1 (LS197)
CP1 (LS196)
20
40
40
80
μ
A
VCC = MAX, VIN = 2.7 V
0.1
0.2
0.2
0.4
mA
VCC = MAX, VIN = 7.0 V
IIL
Input LOW Current
Data, PL
MR
CP0
CP1 (LS196)
CP1 (LS197)
–0.4
–0.8
–2.4
–2.8
–1.3
mA
VCC = MAX, VIN = 0.4 V
IOS
ICC
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
Short Circuit Current (Note 1)
–20
–100
mA
VCC = MAX
VCC = MAX
Power Supply Current
27
mA
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相關代理商/技術參數(shù) |
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|---|---|
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