MC74HC85 Datasheet, PDF (1/8 Pages) Motorola, Inc – 4-Bit Magnitude Comparator

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
4-Bit Magnitude Comparator
High–Performance Silicon–Gate CMOS
The MC74HC85 is identical in pinout and function to the LS85. This device
is similar in function to the MM74C85 and L85, but has a different pinout. The
device inputs are compatible with standard CMOS outputs; with pullup
resistors, they are compatible with LSTTL outputs.
This 4–Bit Magnitude Comparator compares two 4–bit nibbles and gives a
high voltage level on either the A > Bout, A = Bout, or A < Bout output, leaving
the other two at a low voltage level. This device also has A > Bin, A = Bin, and
A < Bin inputs, eliminating the need for external gates when cascading.
• Output Drive Capability: 10 LSTTL Loads
• Outputs Directly Interface to CMOS, NMOS, and TTL
• Operating Voltage Range: 2 to 6 V
• Low Input Current: 1 µA
• High Noise Immunity Characteristic of CMOS Devices
• In Compliance with the Requirements Defined by JEDEC Standard
No. 7A
• Chip Complexity: 248 FETs or 62 Equivalent Gates
LOGIC DIAGRAM
DATA
INPUTS
A0 ¹⁰
A1 ¹²
A2 ¹³
A3 ¹⁵
B0 ⁹
B1 ¹¹
B2 ¹⁴
B3 ¹
CASCADING
INPUTS
A > Bin ⁴
A = Bin ³
A < Bin ²
5 _{A > Bout}
6 _{A = Bout}
7 _{A < Bout}
COMPARISON
OUTPUTS
PIN 16 = VCC
PIN 8 = GND
MC74HC85
16
1
16
1
N SUFFIX
PLASTIC PACKAGE
CASE 648–08
DT SUFFIX
TSSOP PACKAGE
CASE 948F–01
ORDERING INFORMATION
MC74HCXXN
MC74HCXXDT
Plastic
TSSOP
PIN ASSIGNMENT
B3 1
tA Bin 2
A = Bin ₃
uA Bin 4
uA Bout ₅
A = Bout 6
tA Bout 7
GND 8
16 VCC
15 A3
14 B2
13 A2
12 A1
11 B1
10 A0
9 B0
10/95
© Motorola, Inc. 1995
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