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CD4029BE

4-bit presettable up/down binary/decade counter, CMOS, PDIP-16

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Manufacturer Part：

CD4029BE

Package：

PDIP-16 (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 CD4029BE from Texas Instruments is a CMOS presettable up/down binary/decade counter with look-ahead carry, selectable between 4-bit binary (0-15) and BCD decade (0-9) counting modes in a 16-pin PDIP package.

Key Specifications

Function	Presettable up/down binary/decade counter
Counter Bits	4
Technology	CD4000B CMOS
Supply Voltage	3V to 18V
Max Clock Frequency	8MHz typical @ VDD=10V; 11MHz @ VDD=15V
Count Mode	Binary (0-15) or Decade (0-9), pin-selectable
Count Direction	Up or Down, pin-selectable
Preset	Asynchronous via JAM inputs (J1-J4)
Carry Out	Active-LOW (goes LOW at terminal count)
Operating Temperature	-55°C to +125°C
Package	PDIP-16 (19.3 x 6.35mm)

Features

Binary or BCD decade mode — pin-selectable
Up or down counting — pin-selectable
Asynchronous preset via JAM inputs
Look-ahead carry for high-speed cascading
Parallel or ripple clocking for cascading
CMOS 4000B: 3V-18V operation

Applications

Programmable frequency divider
Up/down event counter
Difference counting (up/down)
BCD or binary counting
Analog-to-digital conversion stages

Product Introduction:CD4029BE Product Introduction

The CD4029BE from Texas Instruments is one of the most versatile counter ICs in the CD4000B family. It combines four features that are rare to find in a single package: (1) Up/down counting — the UP/DOWN pin selects whether the counter increments or decrements on each clock edge. (2) Binary or decade mode — the BINARY/DECADE pin selects between 4-bit binary (0-15) and BCD decade (0-9) counting. (3) Preset capability — the JAM inputs (J1-J4) allow the counter to be loaded with any value asynchronously when PRESET ENABLE is HIGH. (4) Look-ahead carry — the CARRY OUT signal goes LOW one clock before the terminal count, enabling high-speed synchronous cascading. This versatility makes the CD4029 ideal for applications like event counters that increment and decrement, programmable dividers, and A/D converter stages. The BE suffix denotes the PDIP-16 package with full military temperature range (-55°C to +125°C).

Working Principle:CD4029BE Working Principle

The CD4029BE advances one count on the positive edge of the CLOCK when both CARRY-IN (active-LOW) and PRESET ENABLE are LOW. CARRY-IN acts as a clock enable: when HIGH, counting is inhibited. The BINARY/DECADE input selects the counting mode: HIGH = binary (0↔15), LOW = decade (0↔9). The UP/DOWN input selects direction: HIGH = count up, LOW = count down. In binary up mode, the counter sequences 0,1,2…14,15,0,1…; in decade up mode: 0,1,2…8,9,0,1…; in binary down mode: 15,14,13…1,0,15,14…; in decade down mode: 9,8,7…1,0,9,8… When PRESET ENABLE is HIGH, the JAM inputs (J1-J4) are asynchronously loaded into the counter — this allows starting from any value. J1 is the LSB, J4 is the MSB. The CARRY OUT signal is normally HIGH and goes LOW when: (a) counting up and the counter reaches its maximum (15 in binary, 9 in decade), OR (b) counting down and the counter reaches zero, provided CARRY-IN is LOW. This CARRY OUT connects to the CARRY-IN of the next stage for cascading. For synchronous (parallel) cascading, all chips share the same clock; each CARRY OUT feeds the next CARRY IN. For ripple cascading, each CARRY OUT connects to the next chip’s CLOCK input.

Pin Description:CD4029BE Pin Definition and Functions

Pin	Name	Type	Description
1	JAM 1	Input	Preset data input (LSB)
2	JAM 2	Input	Preset data input
3	JAM 3	Input	Preset data input
4	JAM 4	Input	Preset data input (MSB)
5	CARRY OUT	Output	Carry out (active-LOW, goes LOW at terminal count)
6	CARRY IN	Input	Carry in / Clock enable (active-LOW, LOW=enable)
7	Q4	Output	Counter output bit 4 (MSB)
8	VSS	Power	Ground (0V)
9	Q3	Output	Counter output bit 3
10	Q2	Output	Counter output bit 2
11	Q1	Output	Counter output bit 1 (LSB)
12	CLOCK	Input	Clock input (positive edge triggered)
13	UP/DOWN	Input	Count direction (HIGH=up, LOW=down)
14	BINARY/DECADE	Input	Count mode (HIGH=binary, LOW=decade/BCD)
15	PRESET ENABLE	Input	Preset enable (HIGH=load JAM inputs, LOW=count)
16	VDD	Power	Positive supply (3V to 18V)

Application Scenarios:In which products and applications isCD4029BE used

Up/Down Event Counter: Sensor pulses → CLOCK; UP/DOWN toggled by direction; BINARY/DECADE=LOW for BCD display; preset to 0 via JAM=0000 + PE pulse
Programmable Divider: Preset JAM inputs to N; count down; CARRY OUT on zero → preset again; divides clock by (N+1)
BCD Counter with Display: CLOCK in; BINARY/DECADE=LOW; UP/DOWN=HIGH; Q1-Q4 → CD4511 BCD-to-7-segment; CARRY OUT → next CD4029 CLOCK for multi-digit
Difference Counter: Two CD4029 chips; one counts up (additions), one counts down (subtractions); difference = up_count − down_count

Alternative Models:What chips are recommended as replacements for CD4029BE

Model	Manufacturer	Key Difference	Package	Supply
CD4029BM	TI	SOIC-16 surface-mount version with identical logic function and 3-18V range	SOIC-16	3-18V
CD4029BE	TI	Through-hole DIP version for prototyping and legacy board repair	DIP-16	3-18V
HEF4029BT	NXP	Pin-compatible CMOS version with improved ESD protection and 3-15V supply	SOIC-16	3-15V
MC144029BDR2G	onsemi	Pin-compatible equivalent with RoHS compliance and AEC-Q100 automotive option	SOIC-16	3-18V
74HC192D	TI/Nexperia	HC CMOS version with higher speed and 2-6V supply for modern logic systems	SOIC-16	2-6V
74HC192N	TI/Nexperia	HC CMOS through-hole version for prototyping with 2-6V supply range	DIP-16	2-6V
74HCT192D	Nexperia	HCT version with TTL-compatible inputs for mixed 5V TTL/CMOS systems	SOIC-16	4.5-5.5V

CD4029 is the CMOS 4000-series up/down binary/decade counter operating over the wide 3-18V supply range. The HEF4029 (NXP) and MC144029 (onsemi) are direct pin-compatible equivalents. For higher speed at the cost of narrower voltage range, the 74HC192 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).