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24LC256-I

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Microchip Tech EEPROM, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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24LC256-I

Microchip Tech · EEPROM · SOIC-8

24LC256-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 A0 input Chip address input used for multiple-device selection; it must be connected to either VCC or VSS.
2 A1 input Chip address input used for multiple-device selection; it must be connected to either VCC or VSS.
3 A2 input Chip address input used for multiple-device selection; it must be connected to either VCC or VSS.
4 VSS power_in Ground reference for the device.
5 SDA bidirectional Open-drain serial address/data I/O that requires a pull-up resistor to VCC (typically 10 kΩ for 100 kHz, 2 kΩ for 400 kHz and 1 MHz), and may change only while SCL is low.
6 SCL input Serial clock input that synchronizes data transfer to and from the device.
7 WP input Write-protect input that must be tied to VSS (writes enabled) or VCC (writes inhibited, reads unaffected).
8 VCC power_in Power supply; the 24LC256 operates from 2.5V 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
All inputs and outputs w.r.t. VSS -0.6 V 3
Storage temperature -65 150 °C 3
Ambient temperature with power applied -40 125 °C 3
ESD protection on all pins 4 kV 3
VCC supply voltage (24LC256 range) VCC 2.5 5.5 V 24LC256 device selection table 1
Ambient temperature, Industrial (I) TA -40 85 °C Industrial (I) 3
Input leakage current ILI -1 1 µA VIN = VSS or VCC, WP = VSS; VIN = VSS or VCC, WP = VCC 3
Output leakage current ILO -1 1 µA VOUT = VSS or VCC 3
Low-level output voltage VOL 0.4 V IOL = 3.0 mA @ VCC = 4.5V; IOL = 2.1 mA @ VCC = 2.5V 3
Pin capacitance (all inputs/outputs) CIN, COUT 10 pF VCC = 5.0V (Note); TA = 25°C, FCLK = 1 MHz 3
Read operating current ICC 400 µA VCC = 5.5V, SCL = 400 kHz 3
Write current ICC 3 mA VCC = 5.5V 3
Standby current ICCS 1 µA SDA = SCL = VCC = 3.6V, A0, A1, A2, WP = VSS, I-Temp. 3
Standby current ICCS 1.5 µA SDA = SCL = VCC = 5.5V, A0, A1, A2, WP = VSS, I-Temp. 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 All except 24FC256 (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
WP setup time TSU:WP 600 ns 2.5V ≤ VCC ≤ 5.5V 5
WP hold time THD:WP 1300 ns 2.5V ≤ VCC ≤ 5.5V 5
Output valid from clock TAA 900 ns 2.5 V ≤ VCC ≤ 5.5V (Note 2) 5
Bus free time TBUF 1300 ns 2.5V ≤ VCC ≤ 5.5V 5
Output fall time from VIH minimum to VIL maximum TOF 250 ns CB ≤ 100 pF; All except 24FC256 (Note 1) 5
Input filter spike suppression (SDA and SCL pins) TSP 50 ns All except 24FC256 (Notes 1 and 3) 5
Write cycle time (byte or page) TWC 5 ms byte or page 5
Endurance 1e+06 cycles 25°C, 5.5V, Page mode (Note 4) 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 8-Lead Plastic Small Outline (SN) - Narrow, 3.90 mm (.150 In.) Body [SOIC] A A2 24

CAD (KiCad official)

  • Symbol: 24LC256-I
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: 24lc256-i-etched.step / 24lc256-i-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 24lc256-i.step / 24lc256-i.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (42 pp, sha256 54a14079d7ced81f, retrieved 2026-10-17, 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