參數(shù)資料
型號(hào): SN74LS147N
廠商: MOTOROLA INC
元件分類(lèi): 通用總線(xiàn)功能
英文描述: 10-LINE-TO-4-LINE AND 8-LINE-TO-3-LINE PRIORITY ENCODERS
中文描述: LS SERIES, 9-BIT ENCODER, PDIP16
封裝: 648-08
文件頁(yè)數(shù): 4/7頁(yè)
文件大?。?/td> 231K
代理商: SN74LS147N
5-248
FAST AND LS TTL DATA
SN54/74LS147
SN54/74LS148
SN54/74LS748
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
All Others
Input 0 (LS748)
Inputs 1–7 (LS148)
Inputs 1–7 (LS748)
20
40
40
60
μ
A
VCC = MAX, VIN = 2.7 V
All Others
Input 0 (LS748)
Inputs 1–7 (LS148)
Inputs 1–7 (LS748)
0.1
0.2
0.2
0.3
mA
VCC = MAX, VIN = 7.0 V
IIL
Input LOW Current
All Others
Input 0 (LS748)
Inputs 1–7 (LS148)
Inputs 1–7 (LS748)
–0.4
–0.8
–0.8
–1.2
mA
VCC = MAX, VIN = 0.4 V
IOS
ICCH
Short Circuit Current (Note 1)
–20
–100
mA
VCC = MAX
VCC = MAX, All Inputs = 4.5 V
VCC = MAX, Inputs 7 & E1 = GND
All Other Inputs = 4.5 V
Power Supply Current Output HIGH
17
mA
ICCL
Output LOW
20
mA
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
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