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24AA256UID-I

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

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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

markdown

24AA256UID-I

Microchip Tech · EEPROM · TSSOP-8

24AA256UID-I from Microchip Tech, in a TSSOP-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 User-configurable chip select input that must be tied to VCC or VSS, compared with the slave address bit to select the device (up to eight devices per bus).
2 A1 input User-configurable chip select input that must be tied to VCC or VSS, compared with the slave address bit to select the device (up to eight devices per bus).
3 A2 input User-configurable chip select input that must be tied to VCC or VSS, compared with the slave address bit to select the device (up to eight devices per bus).
4 VSS power_in Ground.
5 SDA bidirectional Bidirectional open-drain serial data pin for addresses and data, requiring a pull-up resistor to VCC (typical 10 kΩ for 100 kHz, 2 kΩ for 400 kHz).
6 SCL input Serial clock input used to synchronize data transfer to and from the device.
7 NC unconnected Not connected.
8 VCC power_in Supply voltage pin, +1.7V to 5.5V.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package TSSOP-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
Storage temperature -65 150 °C 2
Ambient temperature with power applied -40 85 °C 2
ESD protection on all pins 4 kV 2
Operating supply voltage VCC 1.7 5.5 V Industrial (I) 2
Operating temperature TA -40 85 °C Industrial (I) 2
High-Level Input Voltage VIH 0.7 V min printed as 0.7 VCC 2
Low-Level Input Voltage VIL 0.3 V VCC ≥ 2.5V; max printed as 0.3 VCC 2
Low-Level Input Voltage VIL 0.2 V VCC < 2.5V; max printed as 0.2 VCC 2
Hysteresis of Schmitt Trigger Inputs (SDA, SCL) VHYS 0.05 V VCC ≥ 2.5V (Note); min printed as 0.05 VCC 2
Low-Level Output Voltage VOL 0.4 V IOL = 3.0 mA; VCC = 4.5V 2
Input Leakage Current ILI -1 1 µA VIN = VSS or VCC 2
Output Leakage Current ILO -1 1 µA VOUT = VSS or VCC 2
Pin Capacitance (all inputs/outputs) CIN, COUT 10 pF VCC = 5.0V (Note); TA = 25°C, FCLK = 1 MHz 2
Operating Current (read) ICCREAD 400 µA VCC = 5.5V, SCL = 400 kHz 2
Operating Current (write) ICCWRITE 3 mA VCC = 5.5V 2
Standby Current ICCS 1 µA TA = -40°C to +85°C; SCL = SDA = VCC = 5.5V; A0, A1, A2 = VSS 2
Clock Frequency FCLK 100 kHz 1.7V ≤ VCC < 2.5V 3
Clock Frequency FCLK 400 kHz 2.5V ≤ VCC ≤ 5.5V 3
Clock High Time THIGH 4000 ns 1.7V ≤ VCC < 2.5V 3
Clock High Time THIGH 600 ns 2.5V ≤ VCC ≤ 5.5V 3
Clock Low Time TLOW 4700 ns 1.7V ≤ VCC < 2.5V 3
Clock Low Time TLOW 1300 ns 2.5V ≤ VCC ≤ 5.5V 3
SDA and SCL Rise Time TR 1000 ns 1.7V ≤ VCC < 2.5V (Note 1) 3
SDA and SCL Rise Time TR 300 ns 2.5V ≤ VCC ≤ 5.5V (Note 1) 3
SDA and SCL Fall Time TF 300 ns 3
Start Condition Hold Time THD:STA 4000 ns 1.7V ≤ VCC < 2.5V 3
Start Condition Hold Time THD:STA 600 ns 2.5V ≤ VCC ≤ 5.5V 3
Start Condition Setup Time TSU:STA 4700 ns 1.7V ≤ VCC < 2.5V 3
Start Condition Setup Time TSU:STA 600 ns 2.5V ≤ VCC ≤ 5.5V 3
Data Input Hold Time THD:DAT 0 ns Note 2 3
Data Input Setup Time TSU:DAT 250 ns 1.7V ≤ VCC < 2.5V 3
Data Input Setup Time TSU:DAT 100 ns 2.5V ≤ VCC ≤ 5.5V 3
Stop Condition Setup Time TSU:STO 4000 ns 1.7V ≤ VCC < 2.5V 3
Stop Condition Setup Time TSU:STO 600 ns 2.5V ≤ VCC ≤ 5.5V 3
Output Valid from Clock TAA 3500 ns 1.7 V ≤ VCC < 2.5V (Note 2) 3
Output Valid from Clock TAA 900 ns 2.5 V ≤ VCC ≤ 5.5V (Note 2) 3
Bus Free Time TBUF 4700 ns 1.7V ≤ VCC < 2.5V 3
Bus Free Time TBUF 1300 ns 2.5V ≤ VCC ≤ 5.5V 3
Output Fall Time from VIH minimum to VIL maximum TOF 250 ns CB ≤ 100 pF; Note 1; min printed as 10 + 0.1CB 3
Input Filter Spike Suppression (SDA and SCL) TSP 50 ns Notes 1 and 3 3
Write Cycle Time (byte or page) TWC 5 ms 3
Endurance 1e+06 cycles Page mode, 25°C, 5.5V (Note 4) 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 19

CAD (KiCad official)

  • Symbol: 24AA256UID-I
  • Footprint: Package_SO:TSSOP-8_3x3mm_P0.65mm
  • 3D model: TSSOP-8 (KiCad packages3D, STEP)
  • 3D model files: 24aa256uid-i-etched.step / 24aa256uid-i-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 24aa256uid-i.step / 24aa256uid-i.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (28 pp, sha256 08e38a501c16ceb8, retrieved 2026-10-23, 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