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CD4071BE

Quad 2-input OR gate, CMOS 3-18V, 60ns, PDIP-14

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Manufacturer Part：

CD4071BE

Package：

PDIP-14 (19.3 x 6.35 x 4.57mm, 2.54mm pitch, through-hole)

Brand：

Product Categories：

Integrated Circuits ICs, Interface ICs

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Description

Product Overview

The CD4071BE from Texas Instruments contains four independent 2-input OR gates in a 14-pin PDIP package, providing direct implementation of the positive-logic OR function across the wide 3V-18V CMOS supply range.

Key Specifications

Number of Gates	4 (quad 2-input OR)
Technology	CD4000B CMOS
Supply Voltage	3V to 18V
Propagation Delay	60ns typical @ VDD=10V; 125ns @ 5V
Transition Time	100ns typical @ VDD=5V
Quiescent Current	0.01µA typical @ 25°C
Output Current	1.5mA sink / 1.5mA source @ VDD=10V
Input Capacitance	5pF typical
Noise Margin	1V @ VDD=5V; 2V @ VDD=10V
Operating Temperature	-55°C to +125°C
Package	PDIP-14 (19.3 x 6.35mm)

Features

Quad 2-input OR gates
Wide supply voltage: 3V to 18V
Near-zero quiescent current
High noise immunity
Standardized symmetrical output characteristics

Applications

Signal combining (any-HIGH detection)
Control logic
Address decoding
Alarm systems

Product Introduction:CD4071BE Product Introduction

The CD4071BE from Texas Instruments contains four independent 2-input OR gates. Each gate implements Y = A OR B; the output is HIGH when either or both inputs are HIGH, and LOW only when both inputs are LOW. The CD4071 provides the positive-logic OR function directly — unlike NAND or NOR implementations that require DeMorgan conversion. The 3V-18V supply range makes it compatible with 5V TTL systems, 3.3V logic, 9V battery circuits, and 12V automotive systems. The near-zero quiescent current (0.01µA) means the IC draws virtually no power when the inputs are stable, making it ideal for battery-powered applications. The BE suffix denotes the PDIP-14 package with full military temperature range (-55°C to +125°C).

Working Principle:CD4071BE Working Principle

Each OR gate in the CD4071BE performs Y = A + B (positive logic). The output is HIGH if input A is HIGH, or input B is HIGH, or both are HIGH. The output is LOW only when both inputs are LOW. Truth table: (0,0)→0; (0,1)→1; (1,0)→1; (1,1)→1. The OR function is fundamental in digital logic: it detects when ANY of multiple conditions is active. For active-HIGH alarm systems, multiple fault signals are ORed together — if any fault occurs, the alarm activates. In address decoding, the OR combines multiple enable signals. The CMOS implementation uses complementary PMOS/NMOS transistor pairs: the PMOS network connects the output to VDD when either input is HIGH, and the NMOS network connects the output to VSS when both inputs are LOW. This push-pull output provides symmetrical drive capability (1.5mA source and sink at VDD=10V). The 60ns propagation delay at VDD=10V is adequate for medium-speed applications up to several MHz.

Pin Description:CD4071BE Pin Definition and Functions

Pin	Name	Type	Description
1	1A	Input	Gate 1 input A
2	1B	Input	Gate 1 input B
3	1Y	Output	Gate 1 output (A OR B)
4	2Y	Output	Gate 2 output (A OR B)
5	2A	Input	Gate 2 input A
6	2B	Input	Gate 2 input B
7	VSS	Power	Ground
8	3A	Input	Gate 3 input A
9	3B	Input	Gate 3 input B
10	3Y	Output	Gate 3 output (A OR B)
11	4Y	Output	Gate 4 output (A OR B)
12	4A	Input	Gate 4 input A
13	4B	Input	Gate 4 input B
14	VDD	Power	Supply (3V to 18V)

Application Scenarios:In which products and applications isCD4071BE used

Signal Combine: Two interrupt sources → OR gate → single interrupt line to MCU; either source triggers interrupt
Alarm System: Overtemp, overvoltage, overcurrent signals → three OR gates cascaded → single alarm output
Enable Logic: Manual enable OR auto-enable → OR gate → device enable; device ON if either source is active
Multi-Voltage: Operate at 12V with 5V logic inputs; CMOS thresholds (~6V at VDD=12V) require level shifting of 5V signals

Alternative Models:What chips are recommended as replacements for CD4071BE

Model	Manufacturer	Key Difference	Package	Supply
CD4071BM	TI	SOIC-14 surface-mount version with identical logic function and 3-18V range	SOIC-14	3-18V
CD4071BE	TI	Through-hole DIP version for prototyping and legacy board repair	DIP-14	3-18V
HEF4071BT	NXP	Pin-compatible CMOS version with improved ESD protection and 3-15V supply	SOIC-14	3-15V
MC144071BDR2G	onsemi	Pin-compatible equivalent with RoHS compliance and AEC-Q100 automotive option	SOIC-14	3-18V
74HC32D	TI/Nexperia	HC CMOS version with higher speed and 2-6V supply for modern logic systems	SOIC-14	2-6V
74HC32N	TI/Nexperia	HC CMOS through-hole version for prototyping with 2-6V supply range	DIP-14	2-6V
74HCT32D	Nexperia	HCT version with TTL-compatible inputs for mixed 5V TTL/CMOS systems	SOIC-14	4.5-5.5V

CD4071 is the CMOS 4000-series quad 2-input or gate operating over the wide 3-18V supply range. The HEF4071 (NXP) and MC144071 (onsemi) are direct pin-compatible equivalents. For higher speed at the cost of narrower voltage range, the 74HC32 HC/HCT families offer significantly faster propagation delay and lower power consumption at 2-6V. Surface-mount versions use the BM/M suffix (SOIC); through-hole versions use the BE suffix (DIP).