# 24CW320T-I

**Microchip Tech** · EEPROM · SOIC-8

24CW320T-I from Microchip Tech, in a SOIC-8. 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 | NC | unconnected | No connect; this pin is not internally connected and is listed as a no-connect in the 8-Lead SOIC pin function table. |
| 2 | NC | unconnected | No connect; this pin is not internally connected and is listed as a no-connect in the 8-Lead SOIC pin function table. |
| 3 | NC | unconnected | No connect; this pin is not internally connected and is listed as a no-connect in the 8-Lead SOIC pin function table. |
| 4 | VSS | power_in | Ground reference for the device. |
| 5 | SDA | bidirectional | Open-drain serial data pin that requires a pull-up resistor to VCC (typically 10 kΩ for 100 kHz and 2 kΩ for 400 kHz and 1 MHz), with data allowed to change only while SCL is low except for Start and Stop conditions. |
| 6 | SCL | input | Serial clock input used to synchronize data transfer to and from the device. |
| 7 | NC | unconnected | No connect; this pin is not internally connected and is listed as a no-connect in the 8-Lead SOIC pin function table. |
| 8 | VCC | power_in | Device power supply, operating over a voltage range of 1.6 V to 5.5 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SOIC-8 |
| Category | Memory |
| Pins | 8 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Low-Level Input Voltage | VIL | -0.6 |  |  | V |  | 4 |
| Low-Level Output Voltage | VOL |  |  | 0.4 | V | IOL = 2.1 mA, VCC = 3.0V | 4 |
| Low-Level Output Voltage | VOL |  |  | 0.2 | V | IOL = 0.15 mA, VCC = 1.8V | 4 |
| Input Leakage Current | ILI | -1 |  | 1 | µA | VIN = VSS or VCC | 4 |
| Output Leakage Current | ILO | -1 |  | 1 | µA | VOUT = VSS or VCC | 4 |
| Internal Capacitance (all inputs and outputs) | CINT |  |  | 7 | pF | TAMB = +25°C, FCLK = 1 MHz, VCC = 5.5V (Note 1) | 4 |
| Operating Current (read) | ICCREAD |  |  | 0.3 | mA | VCC = 1.8V, FCLK = 400 kHz | 4 |
| Operating Current (read) | ICCREAD |  |  | 1 | mA | VCC = 5.5V, FCLK = 1 MHz | 4 |
| Operating Current (write) | ICCWRITE |  |  | 1 | mA | VCC = 5.5V, FCLK = 1 MHz | 4 |
| Standby Current | ICCS |  |  | 0.5 | µA | SCL = SDA = VCC = 1.8V | 4 |
| Standby Current | ICCS |  |  | 1 | µA | SCL = SDA = VCC = 5.5V | 4 |
| Clock Frequency | FCLK |  |  | 1000 | kHz | 1.6V ≤ VCC ≤ 5.5V | 5 |
| Clock High Time | THIGH | 260 |  |  | ns | 1.6V ≤ VCC ≤ 5.5V | 5 |
| Clock Low Time | TLOW | 500 |  |  | ns | 1.6V ≤ VCC ≤ 5.5V | 5 |
| SDA and SCL Rise Time | TR |  |  | 1000 | ns | 1.6V ≤ VCC ≤ 5.5V (Note 1) | 5 |
| SDA and SCL Fall Time | TF |  |  | 300 | ns | 1.6V ≤ VCC ≤ 5.5V (Note 1) | 5 |
| Start Condition Hold Time | THD:STA | 260 |  |  | ns | 1.6V ≤ VCC ≤ 5.5V | 5 |
| Start Condition Setup Time | TSU:STA | 260 |  |  | ns | 1.6V ≤ VCC ≤ 5.5V | 5 |
| Data Input Hold Time | THD:DAT | 0 |  |  | ns | (Note 2) | 5 |
| Data Input Setup Time | TSU:DAT | 50 |  |  | ns | 1.6V ≤ VCC ≤ 5.5V | 5 |
| Stop Condition Setup Time | TSU:STO | 260 |  |  | ns | 1.6V ≤ VCC ≤ 5.5V | 5 |
| Output Valid from Clock | TAA |  |  | 450 | ns | 1.6V ≤ VCC ≤ 5.5V | 5 |
| Bus Free Time | TBUF | 500 |  |  | ns | 1.6V ≤ VCC ≤ 5.5V | 5 |
| Input Filter Spike Suppression (SDA and SCL pins) | TSP |  |  | 50 | ns | (Note 3) | 5 |
| Write Cycle Time (byte or page) | TWC |  |  | 5 | ms |  | 5 |
| Write Endurance |  | 1e+06 |  |  | Write Cycles | TA = 25°C, 1.6V VCC 5.5V | 5 |
| Data Retention |  | 200 |  |  | Years | TA = 55°C | 5 |
| Time Required after VCC is Stable before the Device can Accept Commands | TPUP | 100 |  |  | µs |  | 6 |
| Power-on Reset Threshold Voltage | VPOR |  |  | 1.5 | V |  | 6 |
| Minimum Time at VCC = 0V between Power Cycles | TPOFF | 1 |  |  | ms |  | 6 |
| VCC Supply Voltage | VCC |  |  | 6.5 | V |  | 4 |
| All inputs and outputs w.r.t. VSS |  | -0.6 |  | 6.5 | V |  | 4 |
| Storage Temperature |  | -65 |  | 150 | °C |  | 4 |
| Ambient Temperature under Bias |  | -40 |  | 85 | °C |  | 4 |
| ESD Protection on all pins |  | 4 |  |  | kV |  | 4 |
| Operating Supply Voltage (Industrial) | VCC | 1.6 |  | 5.5 | V | Industrial (I) | 4 |
| Operating Ambient Temperature (Industrial) | TA | -40 |  | 85 | °C | Industrial (I) | 4 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | tin | Package: SN = 8-Lead Plastic Small Outline, Narrow, 3.90 mm Body | 48 |

## CAD (KiCad official)

- Symbol: `24CW320T-I`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `24cw320t-i-etched.step` / `24cw320t-i-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `24cw320t-i.step` / `24cw320t-i.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Microchip Tech datasheet](docs/24cw320t-i-datasheet.pdf) (50 pp, sha256 `213f52757c654a29`, retrieved 2026-10-30, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/24cw320t-i-datasheet.pdf)