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25LC040AT-I

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Microchip Tech EEPROM, SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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25LC040AT-I

Microchip Tech · EEPROM · SOT-23-6

25LC040AT-I from Microchip Tech, in a SOT-23-6. 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 SCK input Serial Clock Input; instructions, addresses or data on SI are latched on its rising edge, and SO is updated after its falling edge.
2 VSS power_in Ground reference pin for the device.
3 SI input Serial Data Input that receives instructions, addresses and data, latched on the rising edge of SCK.
4 SO output Serial Data Output that shifts data out after the falling edge of SCK; the pin goes to high-impedance when the device is deselected or HOLD is low.
5 CS input Chip Select input; a low level selects the device, while a high level deselects it and forces Standby mode.
6 VCC power_in Supply voltage; the 25LC040A is specified for 2.5V to 5.5V VCC.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package SOT-23-6
Category Memory
Pins 6

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 VIH1 0.7 1 xVCC (min) / V above VCC (max) 2
Low-level Input Voltage VIL1 -0.3 0.3 V (min) / xVCC (max) VCC ≥ 2.7V (Note 1) 2
Low-level Input Voltage VIL2 -0.3 0.2 V (min) / xVCC (max) VCC < 2.7V (Note 1) 2
Low-level Output Voltage VOL 0.4 V IOL = 2.1 mA 2
Low-level Output Voltage VOL 0.2 V IOL = 1.0 mA, VCC = 2.5V 2
High-level Output Voltage VOH -0.5 V relative to VCC (min = VCC - 0.5 V) IOH = -400 µA 2
Input Leakage Current ILI -1 1 µA CS = VCC, VIN = VSS or VCC 2
Output Leakage Current ILO -1 1 µA CS = VCC, VOUT = VSS or VCC 2
Internal Capacitance (all inputs and outputs) CINT 7 pF TA = 25°C, CLK = 1.0 MHz, VCC = 5.0V (Note 1) 2
Read Operating Current ICC 5 mA VCC = 5.5V; FCLK = 10.0 MHz; SO = Open 2
Read Operating Current ICC 2.5 mA VCC = 2.5V; FCLK = 5.0 MHz; SO = Open 2
Write Operating Current ICC 5 mA VCC = 5.5V 2
Write Operating Current ICC 3 mA VCC = 2.5V 2
Standby Current ICCS 1 µA CS = VCC = 2.5V, Inputs tied to VCC or VSS, TA = +85°C 2
Clock Frequency FCLK 10 MHz 4.5V ≤ VCC ≤ 5.5V 3
Clock Frequency FCLK 5 MHz 2.5V ≤ VCC ≤ 4.5V 3
CS Setup Time TCSS 50 ns 4.5V ≤ VCC ≤ 5.5V 3
CS Setup Time TCSS 100 ns 2.5V ≤ VCC ≤ 4.5V 3
CS Hold Time TCSH 100 ns 4.5V ≤ VCC ≤ 5.5V 3
CS Hold Time TCSH 200 ns 2.5V ≤ VCC ≤ 4.5V 3
CS Disable Time TCSD 50 ns 3
Data Setup Time Tsu 10 ns 4.5V ≤ VCC ≤ 5.5V 3
Data Setup Time Tsu 20 ns 2.5V ≤ VCC ≤ 4.5V 3
Data Hold Time THD 20 ns 4.5V ≤ VCC ≤ 5.5V 3
Data Hold Time THD 40 ns 2.5V ≤ VCC ≤ 4.5V 3
CLK Rise Time TR 100 ns (Note 1) 3
CLK Fall Time TF 100 ns (Note 1) 3
Clock High Time THI 50 ns 4.5V ≤ VCC ≤ 5.5V 3
Clock High Time THI 100 ns 2.5V ≤ VCC ≤ 4.5V 3
Clock Low Time TLO 50 ns 4.5V ≤ VCC ≤ 5.5V 3
Clock Low Time TLO 100 ns 2.5V ≤ VCC ≤ 4.5V 3
Clock Delay Time TCLD 50 ns 3
Clock Enable Time TCLE 50 ns 3
Output Valid from Clock Low TV 50 ns 4.5V ≤ VCC ≤ 5.5V 3
Output Valid from Clock Low TV 100 ns 2.5V ≤ VCC ≤ 4.5V 3
Output Hold Time THO 0 ns (Note 1) 3
Output Disable Time TDIS 40 ns 4.5V ≤ VCC ≤ 5.5V (Note 1) 3
Output Disable Time TDIS 80 ns 2.5V ≤ VCC ≤ 4.5V (Note 1) 3
HOLD Setup Time THS 20 ns 4.5V ≤ VCC ≤ 5.5V 3
HOLD Setup Time THS 40 ns 2.5V ≤ VCC ≤ 4.5V 3
HOLD Hold Time THH 20 ns 4.5V ≤ VCC ≤ 5.5V 4
HOLD Hold Time THH 40 ns 2.5V ≤ VCC ≤ 4.5V 4
HOLD Low to Output High-Z THZ 30 ns 4.5V ≤ VCC ≤ 5.5V (Note 1) 4
HOLD Low to Output High-Z THZ 60 ns 2.5V ≤ VCC ≤ 4.5V (Note 1) 4
HOLD High to Output Valid THV 30 ns 4.5V ≤ VCC ≤ 5.5V 4
HOLD High to Output Valid THV 60 ns 2.5V ≤ VCC ≤ 4.5V 4
Internal Write Cycle Time (byte or page) TWC 5 ms (Note 3) 4
Endurance 1 M E/W cycles 25°C, VCC = 5.5V (Note 2) 4
All inputs and outputs w.r.t. VSS -0.6 1 V (min) / V above VCC (max) All inputs and outputs w.r.t. VSS 2
Storage temperature -65 150 °C 2
Ambient temperature under bias -40 125 °C 2
ESD protection on all pins 4 kV 2
Supply voltage VCC (25LC040A) VCC 2.5 5.5 V 25LC040A 1
Operating ambient temperature, Industrial (I) -40 85 °C Industrial (I) grade, -I suffix 1

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 gold Plastic SOT-23, 6-lead (Tape and Reel only) Note 1: “Y” indicates a Nickel Palladium Gold (NiPdAu) finish. 35

CAD (KiCad official)

  • Symbol: 25LC040AT-I
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6 (KiCad packages3D, STEP)
  • 3D model files: 25lc040at-i-etched.step / 25lc040at-i-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 25lc040at-i.step / 25lc040at-i.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (38 pp, sha256 82188b3a9e9eb5ed, 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