CD4022B Octal Counter

@@ -0,0 +1,60 @@+# CD4022B++**Texas Instruments** · Counter · SOIC-16++The CD4022B is a divide-by-8 (octal) Johnson counter with eight fully decoded, mutually exclusive outputs and a carry-out for cascading. Each clock advances one active output in sequence, making it a simple sequencer or 1-of-8 timing generator. It runs from 3 V to 18 V.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | Q1 | output | Decoded output '1'. High for one clock cycle when count = 1; otherwise low. CMOS push-pull, sourcing/sinking a few mA. |+| 2 | Q0 | output | Decoded output '0'. High for one clock cycle when the counter is at zero (also on reset). |+| 3 | Q2 | output | Decoded output '2'. High for one clock cycle when count = 2. |+| 4 | Q5 | output | Decoded output '5'. High for one clock cycle when count = 5. |+| 5 | Q6 | output | Decoded output '6'. High for one clock cycle when count = 6. |+| 6 | NC | unconnected | No internal connection on the CD4022B (this pin is used on CD4017B for a decoded output). |+| 7 | Q3 | output | Decoded output '3'. High for one clock cycle when count = 3. |+| 8 | VSS | power_in | Negative supply / ground reference (0 V). |+| 9 | NC | unconnected | No internal connection on the CD4022B (this pin is a decoded output on CD4017B). |+| 10 | Q7 | output | Decoded output '7'. High for one clock cycle when count = 7. |+| 11 | Q4 | output | Decoded output '4'. High for one clock cycle when count = 4. |+| 12 | CARRY_OUT | output | Carry output. Completes one full cycle every 8 clock inputs; used to ripple-clock the next device in a cascade. |+| 13 | CLOCK_INHIBIT | input | Active-high clock inhibit. When high, counter advancement via the CLOCK line is disabled. Setup time tS = 230/100/70 ns at 5/10/15 V. |+| 14 | CLOCK | input | Schmitt-triggered clock input. Counter advances on the positive-going transition when CLOCK INHIBIT is low. fCL_max = 2.5/5/5.5 MHz at 5/10/15 V. |+| 15 | RESET | input | Active-high asynchronous reset. Clears the counter to zero (Q0 high) while held high. Minimum pulse width 260/110/60 ns at 5/10/15 V. |+| 16 | VDD | power_in | Positive supply, 3-18 V (absolute max VDD-VSS = 20 V). |++## Key specifications++| Parameter | Value |+|---|---|+| Type | Divide-by-8 Johnson counter |+| Logic family | 4000B (CMOS) |+| Outputs | 8 decoded (1-of-8) + carry-out |+| Supply voltage | 3 V to 18 V |+| Operating temperature | -55 C to 125 C |++## Ordering variants++- `CD4022BE`+- `CD4022BF3A`+- `CD4022BNSR`+- `CD4022BPW`+- `CD4022BPWR`++## CAD (KiCad official)++- Symbol: `cd4022.kicad_sym`+- Footprint: `cd4022.kicad_mod`+- 3D model: SOIC-16 body from KiCad `Package_SO/SOIC-16_3.9x9.9mm_P1.27mm`.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/cd4022b.pdf) (22 pp, sha256 `33e12c4baa664425`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/cd4022-datasheet.pdf)

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