component
25LC040T-I
Public Made by Adomby adom
Microchip Tech EEPROM, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdown25LC040T-I
Microchip Tech · EEPROM · SOIC-8
25LC040T-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 | CS | input | Chip Select: a low level selects the device and a high level deselects it and forces it into Standby mode, and CS must be low after power-up before any sequence is initiated. |
| 2 | SO | output | Serial Data Output: data is shifted out after the falling edge of SCK during a read, and SO goes to high-impedance when the device is deselected or HOLD is lowered. |
| 3 | WP | input | Write-Protect: when low, all writes to the array and STATUS register are disabled and the write enable latch is reset, while when high all functions including nonvolatile writes operate normally. |
| 4 | VSS | power_in | Ground reference for the device. |
| 5 | SI | input | Serial Data Input: receives instructions, addresses and data, latched on the rising edge of SCK. |
| 6 | SCK | input | Serial Clock Input: SI is latched on its rising edge and SO is updated after its falling edge to synchronize communication with the master. |
| 7 | HOLD | input | Hold Input: when pulled low while SCK is low it suspends serial communication without resetting the sequence, and it must be held high when the function is not used. |
| 8 | VCC | power_in | Supply Voltage: the 25LC040 operates from 2.5V to 5.5V per the Device Selection Table. |
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 |
|---|---|---|---|---|---|---|---|
| High-level input voltage | VIH1 | 2 | V | VCC ≥ 2.7V (Note) | 2 | ||
| Low-level input voltage | VIL1 | -0.3 | 0.8 | V | VCC ≥ 2.7V (Note) | 2 | |
| Low-level input voltage | VIL2 | -0.3 | V | VCC < 2.7V (Note) | 2 | ||
| Low-level output voltage | VOL | 0.4 | V | IOL = 2.1 mA | 2 | ||
| Input leakage current | ILI | -1 | 1 | μA | CS = VCC, VIN = VSS TO VCC | 2 | |
| Output leakage current | ILO | -1 | 1 | μA | CS = VCC, VOUT = VSS TO VCC | 2 | |
| Internal Capacitance (all inputs and outputs) | CINT | 7 | pF | TA = 25°C, CLK = 1.0 MHz, VCC = 5.0V (Note) | 2 | ||
| Read Operating Current | ICC | 1 | mA | VCC = 5.5V; FCLK = 3.0 MHz; SO = Open | 2 | ||
| Read Operating Current | ICC | 500 | μA | VCC = 2.5V; FCLK = 2.0 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 | 5 | μA | CS = VCC = 5.5V, Inputs tied to VCC or VSS | 2 | ||
| Standby Current | ICCS | 1 | μA | CS = VCC = 2.5V, Inputs tied to VCC or VSS | 2 | ||
| Clock Frequency | FCLK | 3 | MHz | VCC = 4.5V to 5.5V | 3 | ||
| Clock Frequency | FCLK | 2 | MHz | VCC = 2.5V to 4.5V | 3 | ||
| CS Setup Time | TCSS | 100 | ns | VCC = 4.5V to 5.5V | 3 | ||
| CS Setup Time | TCSS | 250 | ns | VCC = 2.5V to 4.5V | 3 | ||
| CS Hold Time | TCSH | 150 | ns | VCC = 4.5V to 5.5V | 3 | ||
| CS Hold Time | TCSH | 250 | ns | VCC = 2.5V to 4.5V | 3 | ||
| CS Disable Time | TCSD | 500 | ns | 3 | |||
| Data Setup Time | TSU | 30 | ns | VCC = 4.5V to 5.5V | 3 | ||
| Data Setup Time | TSU | 50 | ns | VCC = 2.5V to 4.5V | 3 | ||
| Data Hold Time | THD | 50 | ns | VCC = 4.5V to 5.5V | 3 | ||
| Data Hold Time | THD | 100 | ns | VCC = 2.5V to 4.5V | 3 | ||
| CLK Rise Time | TR | 2 | μs | Note 1 | 3 | ||
| CLK Fall Time | TF | 2 | μs | Note 1 | 3 | ||
| Clock High Time | THI | 150 | ns | VCC = 4.5V to 5.5V | 3 | ||
| Clock High Time | THI | 230 | ns | VCC = 2.5V to 4.5V | 3 | ||
| Clock Low Time | TLO | 150 | ns | VCC = 4.5V to 5.5V | 3 | ||
| Clock Low Time | TLO | 230 | ns | VCC = 2.5V to 4.5V | 3 | ||
| Clock Delay Time | TCLD | 50 | ns | 3 | |||
| Clock Enable Time | TCLE | 50 | ns | 3 | |||
| Output Valid from Clock Low | TV | 150 | ns | VCC = 4.5V to 5.5V | 3 | ||
| Output Valid from Clock Low | TV | 230 | ns | VCC = 2.5V to 4.5V | 3 | ||
| Output Hold Time | THO | 0 | ns | Note 1 | 3 | ||
| Output Disable Time | TDIS | 200 | ns | VCC = 4.5V to 5.5V (Note 1) | 3 | ||
| Output Disable Time | TDIS | 250 | ns | VCC = 2.5V to 4.5V (Note 1) | 3 | ||
| HOLD Setup Time | THS | 100 | ns | VCC = 4.5V to 5.5V | 3 | ||
| HOLD Hold Time | THH | 100 | ns | VCC = 4.5V to 5.5V | 3 | ||
| HOLD Low to Output High-Z | THZ | 100 | ns | VCC = 4.5V to 5.5V (Note 1) | 3 | ||
| HOLD Low to Output High-Z | THZ | 150 | ns | VCC = 2.5V to 4.5V (Note 1) | 3 | ||
| HOLD High to Output Valid | THV | 100 | ns | VCC = 4.5V to 5.5V | 3 | ||
| HOLD High to Output Valid | THV | 150 | ns | VCC = 2.5V to 4.5V | 3 | ||
| Internal Write Cycle Time | TWC | 5 | ms | 3 | |||
| Supply voltage (absolute maximum) | VCC | 7 | V | 2 | |||
| All inputs and outputs w.r.t. VSS | -0.6 | V | w.r.t. VSS | 2 | |||
| Storage temperature | -65 | 150 | °C | 2 | |||
| Ambient temperature under bias | -65 | 125 | °C | 2 | |||
| ESD protection on all pins | 4 | KV | 2 | ||||
| Supply voltage VCC (25LC040) | VCC | 2.5 | 5.5 | V | 25LC040 device selection table | 1 | |
| Operating ambient temperature, Industrial (I) | TA | -40 | 85 | °C | Industrial (I) range | 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 | tin | 8-Lead Plastic Small Outline (SN), Narrow, 150 mil (SOIC) Foot Angle φ 048048 | 14 |
CAD (KiCad official)
- Symbol:
25LC040T-I - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
25lc040t-i-etched.step/25lc040t-i-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);25lc040t-i.step/25lc040t-i.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (22 pp, sha256
01a3497577b9b0de, retrieved 2026-10-28, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).