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M74HC148 View Datasheet(PDF) - STMicroelectronics

Part NameDescriptionManufacturer
M74HC148 8 TO 3 LINE PRIORITY ENCODER ST-Microelectronics
STMicroelectronics ST-Microelectronics
M74HC148 Datasheet PDF : 11 Pages
1 2 3 4 5 6 7 8 9 10
PIN DESCRIPTION
PIN No
9, 7, 6
11, 12, 13,
1, 2, 3, 4,
10
15
5
14
8
16
SYMBOL
A0 to A2
0 to 7
EO
EI
GS
GND
VCC
NAME AND FUNCTION
Data Outputs
Data Inputs
Enable Output
Enable Input
Priority Flag Output
Ground (0V)
Positive Supply Voltage
IEC LOGIC SYMBOL
M54/M74HC148
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VCC
Supply Voltage
-0.5 to +7
V
VI
DC Input Voltage
-0.5 to VCC + 0.5
V
VO
DC Output Voltage
-0.5 to VCC + 0.5
V
IIK
DC Input Diode Current
IOK
DC Output Diode Current
IO
DC Output Source Sink Current Per Output Pin
± 20
mA
± 20
mA
± 25
mA
ICC or IGND DC VCC or Ground Current
± 50
mA
PD
Power Dissipation
500 (*)
mW
Tstg
Storage Temperature
-65 to +150
oC
TL
Lead Temperature (10 sec)
300
oC
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition isnotimplied.
(*) 500 mW: 65 oC derate to 300 mW by 10mW/oC: 65 oC to 85 oC
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
VI
VO
Top
tr, tf
Parameter
Supply Voltage
Input Voltage
Output Voltage
Operating Temperature: M54HC Series
M74HC Series
Input Rise and Fall Time
VCC = 2 V
VCC = 4.5 V
VCC = 6 V
Value
2 to 6
0 to VCC
0 to VCC
-55 to +125
-40 to +85
0 to 1000
0 to 500
0 to 400
Unit
V
V
V
oC
oC
ns
3/11
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