CD4017B

@@ -0,0 +1,60 @@+# CD4017B++**Texas Instruments** · Decade counter (1-of-10 decoded) · PDIP-16++A CMOS decade counter/divider in DIP-16, the chip behind countless LED chasers and sequencers. It is a Johnson counter that decodes to ten outputs (Q0-Q9): exactly one goes high at a time, stepping to the next on each clock rising edge. A carry-out pulses once every ten counts so devices cascade for counting past ten, a clock-inhibit pin freezes the count, and an asynchronous reset returns it to Q0. It runs 3 to 18 V and needs no decoding logic, so a clock plus this chip drives ten LEDs or ten steps directly.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | Q5 | output | Decoded output 5. Goes high during the 6th clock state (count 5). CMOS push-pull output; typical IOH/IOL ~1 mA at VDD=5 V. |+| 2 | Q1 | output | Decoded output 1. Goes high during count 1. |+| 3 | Q0 | output | Decoded output 0. Goes high during count 0 (also the state after RESET). |+| 4 | Q2 | output | Decoded output 2. Goes high during count 2. |+| 5 | Q6 | output | Decoded output 6. Goes high during count 6. |+| 6 | Q7 | output | Decoded output 7. Goes high during count 7. |+| 7 | Q3 | output | Decoded output 3. Goes high during count 3. |+| 8 | VSS | power_in | Negative supply / ground reference (0 V). |+| 9 | Q8 | output | Decoded output 8. Goes high during count 8. |+| 10 | Q4 | output | Decoded output 4. Goes high during count 4. |+| 11 | Q9 | output | Decoded output 9. Goes high during count 9. |+| 12 | CARRY_OUT | output | Carry output. Completes one full cycle every 10 clock inputs (high for counts 0-4, low for counts 5-9); useful for cascading counters. |+| 13 | CLOCK_INHIBIT | input | Active-high clock inhibit. Counter advances on the positive clock transition only when this signal is low; hold high to freeze the count. |+| 14 | CLOCK | input | Clock input with Schmitt-trigger action; permits unlimited input pulse rise/fall times. Counter advances on the positive-going clock edge. Max fCL 5 MHz @ VDD=10 V. |+| 15 | RESET | input | Active-high asynchronous reset. Clears the counter to state 0 (Q0 high, Q1-Q9 low) while held high. |+| 16 | VDD | power_in | Positive supply. Operating range 3 V to 18 V (absolute max -0.5 V to +20 V referenced to VSS). |++## Key specifications++| Parameter | Value |+|---|---|+| Type | Decade counter / divider (Johnson) |+| Outputs | 10 decoded (Q0-Q9, 1 high at a time) |+| Carry out | 1 pulse per 10 counts (cascade) |+| Control | clock, clock-inhibit, async reset |+| Clocking | advances on rising edge |+| Supply voltage | 3-18 V |+| Logic family | 4000B CMOS |+| Package | PDIP-16 |++## Ordering variants++- `CD4017BE (PDIP-16)`+- `CD4017BM96 (SOIC-16, tape & reel)`++## CAD (KiCad official)++- Symbol: `4xxx:4017`+- Footprint: `Package_DIP:DIP-16_W7.62mm`+- 3D model: DIP-16 (KiCad packages3D)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/cd4017b.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/cd4017b-datasheet.pdf)

@@ -0,0 +1,36 @@+{+  "slug": "cd4017b",+  "version": "0.1.0",+  "type": "component",+  "description": "TI CMOS decade counter/divider, DIP-16. Ten decoded outputs, carry out, clock inhibit, reset. 3-18 V. Datasheet-verified.",+  "tags": [+    "component",+    "logic",+    "counter",+    "decade-counter",+    "johnson",+    "dip-16",+    "texas-instruments"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "cd4017b.kicad_sym",+    "cd4017b.kicad_mod",+    "cd4017b.glb",+    "docs/hero.png",+    "docs/cd4017b-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file