component
CD4521BE
Public Made by Adomby adom
Texas Instruments Counters / Dividers, DIP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Generated by kicad-footprint-generator · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 13h ago |
| viewers | 13h ago |
| cd4521be-etched.glb | 13h ago |
| cd4521be-etched.step | 13h ago |
| cd4521be-hero.glb | 13h ago |
| cd4521be-hero.overlay.json | 13h ago |
| cd4521be.glb | 13h ago |
| cd4521be.kicad_mod | 13h ago |
| cd4521be.kicad_sym | 13h ago |
| cd4521be.lbr | 13h ago |
| cd4521be.step | 13h ago |
| package.json | 13h ago |
| page.json | 13h ago |
| README.md | 13h ago |
CD4521BE
Texas Instruments · Counters / Dividers · DIP-16
CD4521BE from Texas Instruments, in a DIP-16. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | Q24 | output | Buffered counter output of stage 24 with count capacity 2^24 = 16,777,216. |
| 2 | RESET | input | A HIGH level resets the counter to the all-0s state and disables the oscillator, and the input is limited to -0.5 V to VDD +0.5 V. |
| 3 | VSS' | power_in | Oscillator Vss' pin brought out from the crystal oscillator to allow use of external resistors for low-power operation. |
| 4 | OUT 2 | output | Oscillator output 2 of the RC or crystal oscillator circuit, which can be tied to IN 2 in the functional test mode. |
| 5 | VDD' | power_in | Oscillator VDD' pin brought out from the crystal oscillator to allow use of external resistors for low-power operation. |
| 6 | IN 2 | input | Oscillator input 2 (counter clock input in the functional test mode), limited to -0.5 V to VDD +0.5 V with an input pulse frequency up to 2 MHz at 5 V, 5 MHz at 10 V and 6.5 MHz at 15 V. |
| 7 | OUT 1 | output | Oscillator output 1 used in the RC or crystal oscillator circuit. |
| 8 | VSS | power_in | Ground (negative supply) pin, the reference for the voltage ratings. |
| 9 | IN 1 | input | Oscillator input 1 that sets the RC or crystal oscillator configuration and must be tied HIGH or LOW when not in use. |
| 10 | Q18 | output | Buffered counter output of stage 18 with count capacity 2^18 = 262,144. |
| 11 | Q19 | output | Buffered counter output of stage 19 with count capacity 2^19 = 524,288. |
| 12 | Q20 | output | Buffered counter output of stage 20 with count capacity 2^20 = 1,048,576. |
| 13 | Q21 | output | Buffered counter output of stage 21 with count capacity 2^21 = 2,097,152. |
| 14 | Q22 | output | Buffered counter output of stage 22 with count capacity 2^22 = 4,194,304. |
| 15 | Q23 | output | Buffered counter output of stage 23 with count capacity 2^23 = 8,388,608. |
| 16 | VDD | power_in | Positive supply pin with a recommended range of 3 V to 18 V and an absolute maximum of -0.5 V to +20 V referenced to VSS. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | DIP-16 |
| Category | Logic ICs |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
CD4521BE - Footprint:
Package_DIP:DIP-16_W7.62mm - 3D model: DIP-16 (KiCad packages3D, STEP)
- 3D model files:
cd4521be-etched.step/cd4521be-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cd4521be.step/cd4521be.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (21 pp, sha256
0f0f6fb3629f4701, retrieved 2026-10-30, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(vision), consensusclaude-opus-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).