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CD4022BE

Divide-by-8 Johnson counter, 8 decoded outputs, CMOS 3-18V, PDIP-16

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制造商零件：

CD4022BE

包装：

PDIP-16 (19.3 x 9.4 x 4.57mm, 2.54mm pitch, through-hole)

品牌：

产品类别：

集成电路 IC, 接口集成电路

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说明

产品概览

The CD4022BE from Texas Instruments is a divide-by-8 Johnson counter with 8 decoded active-HIGH outputs and a carry-out — the octal counterpart of the CD4017 decade counter in a 16-pin PDIP package.

主要规格

功能	Divide-by-8 Johnson counter with decoded outputs
Technology	CD4000B CMOS
电源电压	3V to 18V
Counter Stages	4 (Johnson counter)
Outputs	Q0-Q7 (8 decoded, active-HIGH) + Q4 (carry)
Max Clock Frequency	5MHz @ VDD=10V
Clock Input	Schmitt trigger (accepts slow edges)
重置	Asynchronous, active HIGH (RST)
Clock Enable	Active LOW (EN)
工作温度	-55°C to +125°C
包装	PDIP-16 (19.3 x 9.4mm)

特点

8 decoded active-HIGH outputs (one active at a time)
Johnson counter — spike-free decoded outputs
Carry-out for cascading (Q4, divide-by-8)
Schmitt trigger clock input
Clock enable for gating
3V-18V wide supply range

应用

Octal sequencing (8-step sequencer)
Divide-by-8 frequency counter
LED chaser (8 LEDs)
Demultiplexer (1-to-8)

产品介绍：CD4022BE 产品介绍

The CD4022BE from Texas Instruments is a divide-by-8 Johnson counter with 8 decoded active-HIGH outputs. It is the octal version of the CD4017 (which divides by 10), using a 4-stage Johnson counter to produce 8 sequential states. On each rising clock edge (when EN is LOW), the active output advances from Q0 to Q1 to Q2…Q7 and back to Q0. Only one output is HIGH at any time, producing a clean one-of-eight selection without the glitches common in ripple counters. The carry output (Q4, pin 12) provides a pulse every 8 clock cycles, useful for cascading to the next counter. The Schmitt trigger clock input allows very slow clock edges (like RC oscillators). The enable input (EN, active-LOW) can gate the clock: EN=LOW = count, EN=HIGH = hold. The reset input (RST, active-HIGH) clears the counter to Q0. Two CD4022s can be cascaded for divide-by-64 (8×8). The BE suffix denotes the PDIP-16 package.

工作原理：CD4022BE 工作原理

The CD4022BE uses a 4-stage Johnson counter (twisted-ring counter) to generate 8 sequential states. The Johnson counter feeds back the complement of the last stage to the first: starting from 0000, the sequence is 0000→1000→1100→1110→1111→0111→0011→0001→0000 (8 states). A decoder converts these 8 states into 8 one-active-HIGH outputs (Q0-Q7). Because the Johnson counter changes only one bit per clock, the decoded outputs are glitch-free (no momentary spikes during transitions). The clock advances the counter on the rising edge only when EN is LOW. When EN is HIGH, the clock is ignored and the counter holds. The RST input (HIGH) forces Q0=HIGH and all other outputs LOW. The carry output (Q4) is HIGH during states 0-3 and LOW during states 4-7; it produces a square wave at 1/8 the clock frequency, suitable for cascading to the next CD4022’s clock input. For cascading: Q4 of first CD4022 → CLK of second CD4022; each CD4022 divides by 8; total division = 8×8 = 64.

引脚说明：CD4022BE 引脚定义和功能

针脚	名称	类型	说明
1	Q5	输出	Decoded output 5 (active HIGH)
2	Q1	输出	Decoded output 1 (active HIGH)
3	Q0	输出	Decoded output 0 (active HIGH, reset state)
4	Q2	输出	Decoded output 2 (active HIGH)
5	Q6	输出	Decoded output 6 (active HIGH)
6	Q7	输出	Decoded output 7 (active HIGH)
7	Q3	输出	Decoded output 3 (active HIGH)
8	VSS	电源	地面
9	Q4	输出	Decoded output 4 (also carry output, divide-by-8)
10	RST	输入	Reset (active HIGH, sets Q0=HIGH, all others LOW)
11	CLK	输入	Clock input (Schmitt trigger, positive edge)
12	EN	输入	Clock enable (active LOW; LOW=count, HIGH=hold)
13	北卡罗来纳州	—	No connection
14	北卡罗来纳州	—	No connection
15	北卡罗来纳州	—	No connection
16	VDD	电源	Supply (3V to 18V)

Application Scenarios:In which products and applications isCD4022BE 中古

8-LED Chaser: Clock oscillator → CLK; Q0-Q7 → 8 LEDs; LEDs light one at a time in sequence; RST for restart
Divide-by-8: Input clock → CLK; Q4 (carry) = input/8; cascaded Q4 → next CLK for ÷64
1-to-8 Demultiplexer: Data on EN; CLK advances selection; data appears on selected Q output; or: EN gates whether counting occurs
8-Step Sequencer: CD4022 drives 8 analog switches (CD4066) in sequence; each step routes a different signal; step sequencer for analog or digital systems

Alternative Models:What chips are recommended as replacements for CD4022BE

模型	制造商	主要区别	包装	Supply
CD4022BM	TI	SOIC-16 surface-mount version with identical logic function and 3-18V range	SOIC-16	3-18V
CD4022BE	TI	Through-hole DIP version for prototyping and legacy board repair	DIP-16	3-18V
HEF4022BT	恩智浦	Pin-compatible CMOS version with improved ESD protection and 3-15V supply	SOIC-16	3-15V
MC144022BDR2G	onsemi	Pin-compatible equivalent with RoHS compliance and AEC-Q100 automotive option	SOIC-16	3-18V
74HC4017D	TI/Nexperia	HC CMOS version with higher speed and 2-6V supply for modern logic systems	SOIC-16	2-6V
74HC4017N	TI/Nexperia	HC CMOS through-hole version for prototyping with 2-6V supply range	DIP-16	2-6V
74HCT4017D	Nexperia	HCT version with TTL-compatible inputs for mixed 5V TTL/CMOS systems	SOIC-16	4.5-5.5V

CD4022 is the CMOS 4000-series divide-by-8 counter/decoder operating over the wide 3-18V supply range. The HEF4022 (NXP) and MC144022 (onsemi) are direct pin-compatible equivalents. For higher speed at the cost of narrower voltage range, the 74HC4017 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).

CD4022BE

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