Magnitude Comparator. MM54C85 Datasheet

MM54C85 Comparator. Datasheet pdf. Equivalent

Part MM54C85
Description 4-Bit Magnitude Comparator
Feature MM54C85 MM74C85 4-Bit Magnitude Comparator September 1989 MM54C85 MM74C85 4-Bit Magnitude Comparat.
Manufacture National
Datasheet
Download MM54C85 Datasheet



MM54C85
September 1989
MM54C85 MM74C85 4-Bit Magnitude Comparator
General Description
The MM54C85 MM74C85 is a four-bit magnitude compara-
tor which will perform comparison of straight binary or BCD
codes The circuit consists of eight comparing inputs (A0
A1 A2 A3 B0 B1 B2 B3) three cascading inputs (A l B
A k B and A e B) and three outputs (A l B A k B and
A e B) This device compares two four-bit words (A and B)
and determines whether they are ‘‘greater than ’’ ‘‘less
than ’’ or ‘‘equal to’’ each other by a high level on the appro-
priate output For words greater than four-bits units can be
cascaded by connecting the outputs (A l B A k B and
A e B) of the least significant stage to the cascade inputs
(A l B A k B and A e B) of the next-significant stage In
addition the least significant stage must have a high level
voltage (VIN(1)) applied to the A e B input and low level
voltage (VIN(0)) applied to A l B and A k B inputs
Features
Y Wide supply voltage range
Y Guaranteed noise margin
Y High noise immunity
Y Low power
TTL compatibility
Y Expandable to ‘N’ stages
Y Applicable to binary or BCD
Y Low power pinout 54L85 74L85
3 0V to 15V
1 0V
0 4 VCC (typ )
fan out of 2
driving 74L
Logic Diagram
C1995 National Semiconductor Corporation TL F 5886
TL F 5886 – 1
RRD-B30M105 Printed in U S A



MM54C85
Absolute Maximum Ratings (Note 1)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Voltage at Any Pin
Operating Temperature Range
MM54C85
MM74C85
b0 3V to VCC a 0 3V
b55 C to a125 C
b40 C to a85 C
Storage Temperature Range
b65 C to a150 C
Power Dissipation (PD)
Dual-In-Line
Small Outline
Operating VCC Range
VCC
Lead Temperature
(Soldering 10 seconds)
700 mW
500 mW
3 0V to 15V
18V
260 C
DC Electrical Characteristics Min Max limits apply across temperature range unless otherwise noted
Symbol
Parameter
Conditions
Min
CMOS TO CMOS
VIN(1)
VIN(0)
VOUT(1)
VOUT(0)
IIN(1)
Logical ‘‘1’’ Input Voltage
Logical ‘‘0’’ Input Voltage
Logical ‘‘1’’ Output Voltage
Logical ‘‘0’’ Output Voltage
Logical ‘‘1’’ Input Current
VCC e 5 0V
VCC e 10V
VCC e 5 0V
VCC e 10V
VCC e 5 0V IO e b10 mA
VCC e 10V IO e b10 mA
VCC e 5 0V IO e a10 mA
VCC e 10V IO e a10 mA
VCC e 15V VIN e 15V
35
80
45
90
IIN(0)
Logical ‘‘0’’ Input Current
VCC e 15V VIN e 0V
b1 0
ICC Supply Current
CMOS LPTTL INTERFACE
VCC e 15V
VIN(1)
Logical ‘‘1’’ Input Voltage
54C VCC e 4 5V
74C VCC e 4 75V
VCC b 1 5
VCC b 1 5
VIN(0)
Logical ‘‘0’’ Input Voltage
54C VCC e 4 5V
74C VCC e 4 75V
VOUT(1)
Logical ‘‘1’’ Output Voltage
54C VCC e 4 5V IO e b360 mA
74C VCC e 4 75V IO e b360 mA
24
24
VOUT(0)
Logical ‘‘0’’ Output Voltage
54C VCC e 4 5V IO e 360 mA
74C VCC e 4 75V IO e 360 mA
OUTPUT DRIVE (See 54C 74C Family Characteristics Data Sheet) (Short Circuit Current)
ISOURCE
ISOURCE
ISINK
ISINK
Output Source Current
(P-Channel)
Output Source Current
(P-Channel)
Output Sink Current
(N-Channel)
Output Sink Current
(N-Channel)
VCC e 5 0V VOUT e 0V
TA e 25 C
VCC e 10V VOUT e 0V
TA e 25 C
VCC e 5 0V VOUT e VCC
TA e 25 C
VCC e 10V VOUT e VCC
TA e 25 C
b1 75
b8 0
1 75
80
Typ
0 005
b0 005
0 05
b3 3
b15
36
16
Max
15
20
05
10
10
300
08
08
04
04
Units
V
V
V
V
V
V
V
V
mA
mA
mA
V
V
V
V
V
V
V
V
mA
mA
mA
mA
AC Electrical Characteristics TA e 25 C CL e 50 pF unless otherwise specified
Symbol
Parameter
Conditions
Min Typ Max Units
tpd
Propagation Delay from any A
VCC e 50V
or B Data Input to any
VCC e 10V
Data Output
250 600
100 300
ns
ns
tpd
Propagation Delay Time from
VCC e 50V
any Cascade Input to
VCC e 10V
any Output
200 500
100 250
ns
ns
CIN Input Capacitance
Any Inupt
5 0 pF
CPD
Power Dissipation Capacitance
(Note 3) Per Package
45
pF
AC Parameters are guaranteed by DC correlated testing
Note 1 ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed Except for ‘‘Operating Temperature Range’’
they are not meant to imply that the devices should be operated at these limits The table of ‘‘Electrical Characteristics’’ provides conditions for actual device
operation
Note 2 Capacitance is guaranteed by periodic testing
Note 3 CPD determines the no load AC power consumption of any CMOS device For complete explanation see 54C 74C Family Characteristics application note
AN-90
2





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