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MM54HC148 Datasheet(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. MM54HC148
Description  8-3 Line Priority Encoder
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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MM54HC148 Datasheet(HTML) 2 Page - National Semiconductor (TI)

   
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Absolute Maximum Ratings (Notes12)
If MilitaryAerospace specified devices are required
please contact the National Semiconductor Sales
OfficeDistributors for availability and specifications
Supply Voltage (VCC)
b
05 to a70V
DC Input Voltage (VIN)
b
15 to VCC a15V
DC Output Voltage (VOUT)
b
05 to VCC a05V
Clamp Diode Current (IIK IOK)
g
20 mA
DC Output Current per pin (IOUT)
g
25 mA
DC VCC or GND Current per pin (ICC)
g
50 mA
Storage Temperature Range (TSTG)
b
65 Cto a150 C
Power Dissipation (PD)
(Note 3)
600 mW
SO Package only
500 mW
Lead Temperature (TL)
(Soldering 10 sec)
260 C
Operation Conditions
Min
Max
Units
Supply Voltage (VCC)2
6
V
DC Input or Output Voltage
0
VCC
V
(VIN VOUT)
Operating Temperature Range (TA)
MM74HC
b
40
a
85
C
MM54HC
b
55 a125
C
Input Rise or Fall Times
(tr tf)VCC e 20V
1000
ns
VCC e 45V
500
ns
VCC e 60V
400
ns
DC Electrical Characteristics (Note 4)
TA e 25 C
74HC
54HC
Symbol
Parameter
Conditions
VCC
TA eb40 to 85 CTA eb55 to 125 C
Units
Typ
Guaranteed Limits
VIH
Minimum High Level
20V
15
15
15
V
Input Voltage
45V
315
315
315
V
60V
42
42
42
V
VIL
Maximum Low Level
20V
05
05
05
V
Input Voltage
45V
135
135
135
V
60V
18
18
18
V
VOH
Minimum High Level
VIN e VIH or VIL
Output Voltage
lIOUTl s 20 mA
20V
20
19
19
19
V
45V
45
44
44
44
V
60V
60
59
59
59
V
VIN e VIH or VIL
lIOUTl s 40 mA
45V
47
396
384
37
V
lIOUTl s 52 mA
60V
52
548
534
52
V
VOL
Maximum Low Level
VIN e VIH or VIL
Output Voltage
lIOUTl s 20 mA
20V
0
01
01
01
V
45V
0
01
01
01
V
60V
0
01
01
01
V
VIN e VIH or VIL
lIOUTl s 40 mA
45V
02
026
033
04
V
lIOUTl s 52 mA
60V
02
026
033
04
V
IIN
Maximum Input
VIN e VCC or GND
60V
g
01
g
10
g
10
m
A
Current
ICC
Maximum Quiescent
VIN e VCC or GND
60V
80
80
160
m
A
Supply Current
IOUT e 0 mA
Note 1
Absolute Maximum Ratings are those values beyond which damage to the device may occur
Note 2
Unless otherwise specified all voltages are referenced to ground
Note 3
Power Dissipation temperature deratingplastic ‘‘N’’ package b12 mW C from 65 Cto85 C ceramic ‘‘J’’ package b12 mW C from 100 Cto125 C
Note 4
For a power supply of 5V g10% the worst case output voltages (VOH and VOL) occur for HC at 45V Thus the 45V values should be used when designing
with this supply Worst case VIH and VIL occur at VCC e 55V and 45V respectively (The VIH value at 55V is 385V) The worst case leakage current (IIN ICC and
IOZ) occur for CMOS at the higher voltage and so the 60V values should be used
VIL limits are currently tested at 20% of VCC The above VIL specification (30% of VCC) will be implemented no later than Q1 CY’89
2


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