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PDF N74F148N Data sheet ( Hoja de datos )
| Número de pieza | N74F148N | |
| Descripción | 8-input priority encoder | |
| Fabricantes | Philips | |
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INTEGRATED CIRCUITS
74F148
8-input priority encoder
Product specification
IC15 Data Handbook
Philips
Semiconductors
1990 Mar 01
1 page  
Philips Semiconductors
8-input priority encoder
Product specification
74F148
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limits set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free-air temperature range.)
SYMBOL
PARAMETER
VCC
VIN
IIN
VOUT
IOUT
Tamb
Tstg
Supply voltage
Input voltage
Input current
Voltage applied to output in High output state
Current applied to output in Low output state
Operating free-air temperature range
Storage temperature range
RATING
–0.5 to +7.0
–0.5 to +7.0
–30 to +5
–0.5 to VCC
40
0 to +70
–65 to +150
UNIT
V
V
mA
V
mA
°C
°C
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
VCC
VIH
VIL
IIK
IOH
IOL
Tamb
Supply voltage
High-level input voltage
Low-level input voltage
Input clamp current
High-level output current
Low-level output current
Operating free-air temperature range
LIMITS
MIN
NOM
MAX
4.5 5.0 5.5
2.0
0.8
–18
–1
20
0 +70
UNIT
V
V
V
mA
mA
mA
°C
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
PARAMETER
TEST CONDITIONS1
LIMITS
MIN TYP2 MAX
UNIT
VOH High-level output voltage
VCC = MIN, VIL = MAX ±10%VCC
VIH = MIN, IOH = MAX ±5%VCC
2.5
2.7
3.4
V
VOL Low-level output voltage
VCC = MIN, VIL = MAX ±10%VCC
VIH = MIN, IOL = MAX ±5%VCC
0.30 0.50
0.30 0.50
V
VIK Input clamp voltage
VCC = MIN, II = IIK
–0.73 –1.2
V
II
Input current at maximum input voltage
VCC = MAX, VI = 7.0V
100 µA
IIH High-level input current
VCC = MAX, VI = 2.7V
20 µA
I0
IIL Low-level input current
VCC = MAX, VI = 0.5V
I1 – I7, EI
–0.6 mA
–1.2 mA
IOS Short-circuit output current3
VCC = MAX
–60
–150
mA
ICC Supply current (total)4
VCC = MAX
23 35
mA
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at VCC = 5V, Tamb = 25°C.
3. Not more than one output should be shorted at a time. For testing IOS, the use of high-speed test apparatus and/or sample-and-hold
techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting
of a High output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any
sequence of parameter tests, IOS tests should be performed last.
4. To measure ICC, outputs must be open, VIN on all inputs = 4.5V.
March 1, 1990
5
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