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參數(shù)資料
| 型號： | 74LS848 |
| 廠商： | Motorola, Inc. |
| 英文描述： | 8-INPUT PRIORITY ENCODERS WITH 3-STATE OUTPUTS |
| 中文描述： | 8 - 3輸入優(yōu)先編碼器態(tài)輸出 |
| 文件頁數(shù)： | 3/6頁 |
| 文件大小： | 216K |
| 代理商： | 74LS848 |
5-501
FAST AND LS TTL DATA
SN54/74LS348
SN54/74LS848
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
A0, A1, A2
54, 74
2.4
3.1
V
or VIL per Truth Table
EO, GS
54
2.5
3.5
V
VCC = MIN, IOH = MAX, VIN = VIH
EO, GS
74
2.7
3.5
V
VOL
Output LOW Voltage
EO, GS
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
VOL
Output LOW Voltage
A0, A1, A2
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
Input 0, EI — LS348
20
μ
A
VCC = MAX, VIN = 2.7 V
Input 0 — LS848
40
μ
A
Other — LS348
Other — LS848
40
60
μ
A
μ
A
Input HIGH Current
Input 0, EI — LS348
0.1
mA
VCC = MAX, VIN = 7.0 V
Input 0 — LS848
0.2
mA
Other — LS348
Other — LS848
0.2
0.3
mA
mA
IIL
Input LOW Current
Input 0, EI — LS348
–0.4
mA
VCC = MAX, VIN = 0.4 V
Input 0 — LS848
–0.8
mA
Other — LS348
Other — LS848
–0.8
–1.2
mA
mA
IOS
Short Circuit Current (Note 1)
EO, GS
A0, A1, A2
–20
–120
mA
VCC = MAX
–30
–130
mA
ICC
Power Supply Current
Total, Output HIGH
12
23
mA
VCC = MAX
All Inputs and Outputs Open
Total, Output LOW
13
25
VCC = MAX, Inputs 7, EI = GND
All Others Open
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
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