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24CW640T-I

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Microchip Tech EEPROM, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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24CW640T-I

Microchip Tech · EEPROM · SOT-23-5

24CW640T-I from Microchip Tech, in a SOT-23-5. 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 SCL input Serial clock input used to synchronize data transfer to and from the device.
2 VSS power_in Ground reference for the device.
3 SDA bidirectional Open-drain serial data pin for transferring addresses and data; it requires a pull-up resistor to VCC (typically 10 kΩ at 100 kHz and 2 kΩ at 400 kHz and 1 MHz), and it may change only while SCL is low.
4 VCC power_in Device power supply; the datasheet specifies an operating voltage range of 1.6 V to 5.5 V.
5 NC unconnected No connect pin; the datasheet lists it only as No Connect with no function.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package SOT-23-5
Category Memory
Pins 5

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 0.5 V Printed as min VCC x 0.7 and max VCC + 0.5; numbers are the VCC multiplier and offset, not absolute volts. VCC = 1.6V to 5.5V (table header). 4
Low-Level Input Voltage VIL -0.6 0.3 V Printed as min -0.6 and max VCC x 0.3; max number is the VCC multiplier, not absolute volts. VCC = 1.6V to 5.5V (table header). 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 VCC = 0V 6
VCC Supply Voltage VCC 1.6 5.5 V Industrial (I) temperature range (table header) 4
Ambient Temperature (Industrial) TA -40 85 °C Industrial (I) grade, VCC = 1.6V to 5.5V (table header) 4
VCC Power-up Slew Rate 0.1 V/µs Monotonic rise from VSS to minimum VCC during power-up 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 Printed as >4 kV 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: 24CW640T-I
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: 24cw640t-i-etched.step / 24cw640t-i-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 24cw640t-i.step / 24cw640t-i.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (50 pp, sha256 213f52757c654a29, retrieved 2026-10-20, 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