# CD74HC93M

**Texas Instruments** · Counters, Dividers · SOIC-14

CD74HC93M from Texas Instruments, in a SOIC-14. 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 | CP1 | input | Active-low clock input of the divide-by-eight section, with state changes on the HIGH-to-LOW transition; Q0 must be connected externally to it for a 4-bit counter. |
| 2 | MR1 | input | Asynchronous master reset input, gated AND with MR2; when both are high it overrides both clocks and resets all flip-flops (Q0 to Q3 low). |
| 3 | MR2 | input | Asynchronous master reset input, gated AND with MR1; when both are high it overrides both clocks and resets all flip-flops (Q0 to Q3 low). |
| 4 | NC | unconnected | No internal connection. |
| 5 | VCC | power_in | Positive supply voltage, 2 V to 6 V for HC types, with a 0.1-µF bypass capacitor recommended close to the pin. |
| 6 | NC | unconnected | No internal connection. |
| 7 | NC | unconnected | No internal connection. |
| 8 | Q2 | output | Divide-by-four output of the 4-bit ripple counter (third bit), driving up to 10 LSTTL loads for standard outputs. |
| 9 | Q1 | output | Divide-by-two output of the divide-by-eight section (second bit of the 4-bit ripple counter). |
| 10 | GND | power_in | Ground reference (0 V) for the supply. |
| 11 | Q3 | output | Divide-by-eight output of the divide-by-eight section (fourth bit of the 4-bit ripple counter, divide-by-16 overall). |
| 12 | Q0 | output | Output of the divide-by-two section (divide-by-2 from CP0); must be connected externally to CP1 for 4-bit counting. |
| 13 | NC | unconnected | No internal connection. |
| 14 | CP0 | input | Active-low clock input of the divide-by-two section, with state changes on the HIGH-to-LOW transition. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-14 |
| Category | Logic |
| Pins | 14 |

## CAD (KiCad official)

- Symbol: `CD74HC93M`
- Footprint: `Package_SO:SOIC-14_3.9x8.7mm_P1.27mm`
- 3D model: SOIC-14 (KiCad packages3D, STEP)
- 3D model files: `cd74hc93m-etched.step` / `cd74hc93m-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cd74hc93m.step` / `cd74hc93m.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/cd74hc93.pdf) (22 pp, sha256 `b629d8b2ee811178`, retrieved 2026-11-05, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-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).

[Datasheet PDF](docs/cd74hc93m-datasheet.pdf)