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7485 4-bit Magnitude Comparator

Compares two 4-bit binary numbers (A and B)
Provides outputs for A > B, A = B, and A < B
Operates with standard TTL logic levels
Cascadable for comparing larger bit-width numbers
Commonly used in digital sorting, arithmetic, and decision circuits

SKU: 7485

25,00 EGP

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Description

7485 4-bit Magnitude Comparator – Product Overview

The 7485 is a high-speed, 4-bit magnitude comparator IC that compares two 4-bit binary numbers and indicates whether one is greater than, less than, or equal to the other. It is commonly used in digital systems requiring number comparison, sorting, and decision-making operations.

⚙️ Key Features

✅ Compares two 4-bit binary words (A and B) simultaneously
✅ Provides outputs for A > B, A = B, and A < B conditions
✅ Can be cascaded to compare numbers longer than 4 bits
✅ High-speed operation with typical propagation delay of ~22 ns
✅ TTL compatible inputs and outputs
✅ Operates at standard 5V TTL logic levels
✅ Available in DIP-16 package for easy breadboard use

📋 Specifications

Parameter	Description
IC Number	7485
Comparison Bits	4 bits
Outputs	A > B, A = B, A < B
Operating Voltage	4.75V to 5.25V (Typical 5V)
Propagation Delay	Approx. 22 ns
Logic Family	TTL (Transistor-Transistor Logic)
Package Type	DIP-16

🎯 Applications

Digital sorting and priority circuits
Arithmetic logic units (ALUs)
Data processing and decision circuits
Digital communication systems
Microprocessor and microcontroller interfacing

📦 Package Includes

1 × 7485 4-bit Magnitude Comparator IC (DIP-16)

Pin Layout

Pin Description

Pin Number	Description
1	B3 Input
2	A
3	A=B Input
4	A>B Input
5	A>B Output
6	A=B Output
7	A
8	Ground
9	B0 Input
10	A0 Input
11	B1 Input
12	A1 Input
13	A2 Input
14	B2 Input
15	A3 Input
16	Vcc – Positive Supply

Dimensional Drawing

Technical Data

Absolute Maximum Ratings

Supply Voltage	7V
Input Voltage	5.5V
Operating Free Air Temperature	0°C to +70°C
Storage Temperature Range	-65°C to +150°C

Recommended Operating Conditions

Symbol	Parameter	Min	Typ	Max	Units
Vcc	Supply Voltage	4.75	5	5.25	V
Vih	HIGH Level Input Voltage	2			V
Vil	LOW Level Input Voltage			0.8	V
Ioh	HIGH Level Output Current			-0.4	mA
Iol	LOW Level Output Current			16	mA
Ta	Free Air Operating Temperature	0		70	°C

Electrical Characteristics

Symbol	Parameter	Conditions	Min	Typ	Max	Units
Vi	Input Clamp Voltage	Vcc=Min Ii=-12mA			-1.5	V
Voh	HIGH Level Output Voltage	Vcc=Min Ioh=MAX Vil=MAX	2.4	3.4		V
Vol	LOW Level Output Voltage	Vcc=Min Iol=MAX Vih=MAX		0.2	0.4	V
Ii	Input Current@MAX Input Voltage	Vcc=Max Vi=5.5V			1	mA
Iih	HIGH Level Input Current	Vcc=Max Vi=2.4V			40	µA
Iil	LOW Level Input Current	Vcc=Max Vi=0.4V			-1.6	mA
Ios	Short Circuit Output Current	Vcc=Max	-18		-55	mA
Icch	Supply Current with Outputs HIGH	Vcc=Max		4	8	mA
Iccl	Supply Current with Outputs LOW	Vcc=Max		12	22	mA

Switching Characteristics at Vcc=5V,Ta=25°C

Symbol	Parameter	Conditions	Min	Typ	Max	Units
tplh	Propagation Delay Time LOW-to-HIGH Level Output	Cl=15pF Rl=400R			22	nS
tphl	Propagation Delay Time HIGH-to-LOW Level Output	Cl=15pF Rl=400R			15	nS

Specification

General

Weight Weight	0,0015 g
Dimensions	2,43 × 0,76 × 0,33 mm
Product Name	7485 4-Bit Magnitude Comparator
Logic Family	TTL
Function	4-Bit Magnitude Comparison (A > B, A = B, A < B)
Number of Bits	4
Supply Voltage	4.75V – 5.25V (Typical 5V)
Input Voltage (VIH/VIL)	2V min / 0.8V max
Output Current (IOL/IOH)	16mA / -0.4mA
Propagation Delay	15ns (typical)
Operating Temperature Range	0°C – +70°C
Package Type	DIP-16
Mounting Type	Through-Hole
Output Type	TTL Compatible
RoHS Compliant	Yes