# 24LC01B

**Microchip Tech** · Pre-ordered MCUs · PDIP-8

24LC01B from Microchip Tech, in a PDIP-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 | A0 | unconnected | Not used by the 24XX01 (no internal connection); may be left floating or tied to either VSS or VCC. |
| 2 | A1 | unconnected | Not used by the 24XX01 (no internal connection); may be left floating or tied to either VSS or VCC. |
| 3 | A2 | unconnected | Not used by the 24XX01 (no internal connection); may be left floating or tied to either VSS or VCC. |
| 4 | VSS | power_in | Ground. |
| 5 | SDA | bidirectional | Bidirectional open-drain serial address/data I/O that requires a pull-up resistor to VCC (typical 10 kΩ for 100 kHz, 2 kΩ for 400 kHz and 1 MHz). |
| 6 | SCL | input | Serial clock input used to synchronize data transfer to and from the device. |
| 7 | WP | input | Write-protect input that must be tied to VSS (normal read/write of memory 00-7F) or VCC (write operations inhibited, reads unaffected). |
| 8 | VCC | power_in | Power supply; 2.5V to 5.5V for the 24LC01B. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | PDIP-8 |
| Category | Embedded Processors & Controllers |
| 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 |
|---|---|---|---|---|---|---|---|
| High-Level Input Voltage | VIH | 0.7 |  |  | VCC |  | 3 |
| Low-Level Input Voltage | VIL |  |  | 0.3 | VCC |  | 3 |
| Hysteresis of Schmitt Trigger Inputs | VHYS | 0.05 |  |  | VCC | Note: periodically sampled, not 100% tested | 3 |
| Low-Level Output Voltage | VOL |  |  | 0.4 | V | IOL = 3.0 mA, VCC = 2.5V | 3 |
| Input Leakage Current | ILI | -1 |  | 1 | µA | VIN = VSS or VCC | 3 |
| Output Leakage Current | ILO | -1 |  | 1 | µA | VOUT = VSS or VCC | 3 |
| Pin Capacitance (all inputs/outputs) | CIN, COUT |  |  | 10 | pF | VCC = 5.0V, TA = 25°C, FCLK = 1 MHz (Note) | 3 |
| Operating Current (write) | ICCWRITE |  |  | 3 | mA | VCC = 5.5V, SCL = 400 kHz | 3 |
| Operating Current (read) | ICCREAD |  |  | 1 | mA | VCC = 5.5V, SCL = 400 kHz | 3 |
| Standby Current, I-Temp. | ICCS |  |  | 1 | µA | SDA = SCL = VCC, WP = VSS, I-Temp. | 3 |
| Standby Current, E-Temp. | ICCS |  |  | 5 | µA | SDA = SCL = VCC, WP = VSS, E-Temp. (24LC01B) | 3 |
| Clock Frequency | FCLK |  |  | 400 | kHz | 2.5V ≤ VCC ≤ 5.5V | 4 |
| Clock High Time | THIGH | 600 |  |  | ns | 2.5V ≤ VCC ≤ 5.5V | 4 |
| Clock Low Time | TLOW | 1300 |  |  | ns | 2.5V ≤ VCC ≤ 5.5V | 4 |
| SDA and SCL Rise Time | TR |  |  | 300 | ns | 2.5V ≤ VCC ≤ 5.5V (Note 1) | 4 |
| SDA and SCL Fall Time | TF |  |  | 300 | ns | (Note 1) | 4 |
| Start Condition Hold Time | THD:STA | 600 |  |  | ns | 2.5V ≤ VCC ≤ 5.5V | 4 |
| Start Condition Setup Time | TSU:STA | 600 |  |  | ns | 2.5V ≤ VCC ≤ 5.5V | 4 |
| Data Input Hold Time | THD:DAT | 0 |  |  | ns | (Note 2) | 4 |
| Data Input Setup Time | TSU:DAT | 100 |  |  | ns | 2.5V ≤ VCC ≤ 5.5V | 4 |
| Stop Condition Setup Time | TSU:STO | 600 |  |  | ns | 2.5V ≤ VCC ≤ 5.5V | 4 |
| Output Valid from Clock | TAA |  |  | 900 | ns | 2.5V ≤ VCC ≤ 5.5V (Note 2) | 4 |
| Bus Free Time | TBUF | 1300 |  |  | ns | 2.5V ≤ VCC ≤ 5.5V | 5 |
| Output Fall Time from VIH Min to VIL Max | TOF |  |  | 250 | ns | 2.5V ≤ VCC ≤ 5.5V (24LC01B) (Notes 1 and 3); min 20+0.1CB | 5 |
| Input Filter Spike Suppression (SDA and SCL) | TSP |  |  | 50 | ns | (Note 1) | 5 |
| Write Cycle Time (byte or page) | TWC |  |  | 5 | ms |  | 5 |
| Endurance |  | 1e+06 |  |  | cycles | 25°C, 5.5V, Page Mode (Note 4) | 5 |
| Supply Voltage Range | VCC | 2.5 |  | 5.5 | V | 24LC01B | 3 |
| Operating Temperature, Industrial | TA | -40 |  | 85 | °C | Industrial (I) | 3 |
| Operating Temperature, Extended | TA | -40 |  | 125 | °C | Extended (E) | 3 |
| Storage Temperature |  | -65 |  | 150 | °C |  | 3 |
| Ambient Temperature with Power Applied |  | -40 |  | 125 | °C |  | 3 |
| ESD Protection on all pins |  |  |  | 4 | kV |  | 3 |

## 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 | 8-Lead Plastic Small Outline (SN) - Narrow, 3.90 mm (.150 In.) Body [SOIC] A A2 | 27 |

## CAD (KiCad official)

- Symbol: `24LC01B`
- Footprint: `Package_DIP:DIP-8_W7.62mm`
- 3D model: PDIP-8 (KiCad packages3D, STEP)
- 3D model files: `24lc01b-etched.step` / `24lc01b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `24lc01b.step` / `24lc01b.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Microchip Tech datasheet](docs/24lc01b-datasheet.pdf) (47 pp, sha256 `16473cef298f150f`, retrieved 2026-10-27, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/24lc01b-datasheet.pdf)