# AT24CM01-SSHD-T

**Microchip Tech** · EEPROM · SOIC-8

AT24CM01-SSHD-T 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; the pin function table assigns no electrical function to this pin. |
| 2 | A1 | input | Device address input that may be hardwired or left floating, and if floating it is internally pulled down to GND when board coupling to VCC is below 3pF (Atmel recommends connecting it to GND if coupling is above 3pF). |
| 3 | A2 | input | Device address input that may be hardwired or left floating, and if floating it is internally pulled down to GND when board coupling to VCC is below 3pF (Atmel recommends connecting it to GND if coupling is above 3pF). |
| 4 | GND | power_in | Ground reference for the device. |
| 5 | SDA | bidirectional | Bidirectional serial data pin, open-drain driven, that may be wire-ORed with other open-drain or open-collector devices and must be pulled high by an external device. |
| 6 | SCL | input | Serial clock input where data is clocked into the device on the positive edge and clocked out on the negative edge of SCL. |
| 7 | WP | input | Write Protect input; connecting it to GND allows normal write operations, connecting it to VCC inhibits all memory writes, and if left floating it is internally pulled down to GND when board coupling to VCC is below 3pF. |
| 8 | VCC | power_in | Power supply; for the 2.5V option (this SSHD-T variant) VCC is specified from 2.5V to 5.5V, and the 1.7V option is specified from 1.7V to 5.5V. |

## 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 |
|---|---|---|---|---|---|---|---|
| Operating Temperature |  | -55 |  | 125 | C |  | 2 |
| Storage Temperature |  | -65 |  | 150 | C |  | 2 |
| Voltage on any pin with respect to ground |  | -1 |  | 7 | V |  | 2 |
| Maximum Operating Voltage |  |  |  | 6.25 | V |  | 2 |
| DC Output Current |  |  |  | 5 | mA |  | 2 |
| Supply Voltage, 2.5V Option | VCC2 | 2.5 |  | 5.5 | V |  | 4 |
| Operating temperature range (industrial) | TAI | -40 |  | 85 | C |  | 4 |
| Input/Output Capacitance (SDA) | CI/O |  |  | 8 | pF | VI/O = 0V | 4 |
| Input Capacitance (A2, A1, SCL) | CIN |  |  | 6 | pF | VIN = 0V | 4 |
| Supply Current Read | ICC |  |  | 2 | mA | VCC = 5.0V Read at 400kHz | 4 |
| Supply Current Write | ICC |  |  | 3 | mA | VCC = 5.0V Write at 400kHz | 4 |
| Standby Current | ISB |  |  | 2 | μA | VCC = 2.5V | 4 |
| Standby Current | ISB |  |  | 3 | μA | VCC = 3.6V, VIN = VCC or VSS | 4 |
| Standby Current | ISB |  |  | 6 | μA | VCC = 5.5V | 4 |
| Input Leakage Current | ILI |  | 0.1 | 3 | μA | VIN = VCC or VSS | 4 |
| Output Leakage Current | ILO |  | 0.05 | 3 | μA | VOUT = VCC or VSS | 4 |
| Input Low Level | VIL | -0.6 |  |  | V |  | 4 |
| Output Low Level | VOL2 |  |  | 0.4 | V | VCC = 3.0V IOL = 2.1mA | 4 |
| Clock Frequency, SCL | fSCL |  |  | 1000 | kHz |  | 5 |
| Clock Pulse Width Low | tLOW | 400 |  |  | ns |  | 5 |
| Clock Pulse Width High | tHIGH | 400 |  |  | ns |  | 5 |
| Noise Suppression Time | tI |  |  | 50 | ns |  | 5 |
| Clock Low to Data Out Valid | tAA | 50 |  | 550 | ns |  | 5 |
| Time the bus must be free before a new transmission can start | tBUF | 500 |  |  | ns |  | 5 |
| Start Condition Hold Time | tHD.STA | 250 |  |  | ns |  | 5 |
| Start Condition Set-up Time | tSU.STA | 250 |  |  | ns |  | 5 |
| Data In Hold Time | tHD.DAT | 0 |  |  | ns |  | 5 |
| Data In Set-up Time | tSU.DAT | 100 |  |  | ns |  | 5 |
| Inputs Rise Time | tR |  |  | 300 | ns |  | 5 |
| Inputs Fall Time | tF |  |  | 100 | ns |  | 5 |
| Stop Condition Set-up Time | tSU.STO | 250 |  |  | ns |  | 5 |
| Data Out Hold Time | tDH | 50 |  |  | ns |  | 5 |
| Write Cycle Time | tWR |  |  | 5 | ms |  | 5 |

## 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 | U = Green, Matte Sn Lead Finish | 13 |

## CAD (KiCad official)

- Symbol: `AT24CM01-SSHD-T`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `at24cm01-sshd-t-etched.step` / `at24cm01-sshd-t-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `at24cm01-sshd-t.step` / `at24cm01-sshd-t.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Microchip Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586176925337866240) (21 pp, sha256 `1d3635134c038877`, retrieved 2026-10-19, tier: lcsc)
- **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/at24cm01-sshd-t-datasheet.pdf)