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25LC320A-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
markdown25LC320A-I
Microchip Tech · EEPROM · SOIC-8
25LC320A-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 | Active-low Chip Select input; a high level deselects the device and forces it into Standby mode, and SO goes high-impedance when deselected. |
| 2 | SO | output | Serial Data Output that shifts data out after the falling edge of SCK during a read cycle and goes to high-impedance when the device is deselected or HOLD is low. |
| 3 | WP | input | Write-Protect input that, together with the WPEN bit in the STATUS register, disables writes to the nonvolatile STATUS register bits when low; the WP function is blocked when WPEN is low. |
| 4 | VSS | power_in | Ground reference pin for the device. |
| 5 | SI | input | Serial Data Input that receives instructions, addresses and data, latched on the rising edge of SCK. |
| 6 | SCK | input | Serial Clock input that synchronizes communication; SI is latched on its rising edge and SO is updated after its falling edge. |
| 7 | HOLD | input | Hold input that must be held high when not used; pulling it low while SCK is low pauses serial communication and tri-states SO without resetting the sequence. |
| 8 | VCC | power_in | Supply voltage pin; the device selection table lists a VCC range of 2.5V to 5.5V for this part. |
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 |
|---|---|---|---|---|---|---|---|
| Low-Level Input Voltage | VIL1 | -0.3 | V | VCC ≥ 2.7V | 3 | ||
| Low-Level Output Voltage | VOL1 | 0.4 | V | IOL = 2.1 mA | 3 | ||
| Low-Level Output Voltage | VOL2 | 0.2 | V | IOL = 1.0 mA | 3 | ||
| Input Leakage Current | ILI | -2 | 2 | µA | CS = VCC, VIN = VSS or VCC | 3 | |
| Output Leakage Current | ILO | -2 | 2 | µA | CS = VCC, VOUT = VSS or VCC | 3 | |
| Internal Capacitance (all inputs and outputs) | CINT | 7 | pF | TA = 25°C, CLK = 1.0 MHz, VCC = 5.0V (Note 1) | 3 | ||
| Read Operating Current | ICC | 5 | mA | VCC = 5.5V; FCLK = 5.0 MHz; SO = Open | 3 | ||
| Read Operating Current | ICC | 2.5 | mA | VCC = 2.5V; FCLK = 3.0 MHz; SO = Open | 3 | ||
| Write Operating Current | ICC | 5 | mA | VCC = 5.5V | 3 | ||
| Write Operating Current | ICC | 3 | mA | VCC = 2.5V | 3 | ||
| Standby Current | ICCS | 10 | µA | CS = VCC = 5.5V, Inputs tied to VCC or VSS, +150°C | 3 | ||
| Clock Frequency | FCLK | 5 | MHz | 4.5V ≤ Vcc ≤ 5.5V | 4 | ||
| Clock Frequency | FCLK | 3 | MHz | 2.5V ≤ Vcc < 4.5V | 4 | ||
| CS Setup Time | TCSS | 100 | ns | 4.5V ≤ Vcc ≤ 5.5V | 4 | ||
| CS Setup Time | TCSS | 150 | ns | 2.5V ≤ Vcc < 4.5V | 4 | ||
| CS Hold Time | TCSH | 200 | ns | 4.5V ≤ Vcc ≤ 5.5V | 4 | ||
| CS Hold Time | TCSH | 250 | ns | 2.5V ≤ Vcc < 4.5V | 4 | ||
| CS Disable Time | TCSD | 50 | ns | 4 | |||
| Data Setup Time | TSU | 20 | ns | 4.5V ≤ Vcc ≤ 5.5V | 4 | ||
| Data Setup Time | TSU | 30 | ns | 2.5V ≤ Vcc < 4.5V | 4 | ||
| Data Hold Time | THD | 40 | ns | 4.5V ≤ Vcc ≤ 5.5V | 4 | ||
| Data Hold Time | THD | 50 | ns | 2.5V ≤ Vcc < 4.5V | 4 | ||
| CLK Rise Time | TR | 2 | µs | Note 1 | 4 | ||
| CLK Fall Time | TF | 2 | µs | Note 1 | 4 | ||
| Clock High Time | THI | 100 | ns | 4.5V ≤ Vcc ≤ 5.5V | 4 | ||
| Clock High Time | THI | 150 | ns | 2.5V ≤ Vcc < 4.5V | 4 | ||
| Clock Low Time | TLO | 100 | ns | 4.5V ≤ Vcc ≤ 5.5V | 4 | ||
| Clock Low Time | TLO | 150 | ns | 2.5V ≤ Vcc < 4.5V | 4 | ||
| Clock Delay Time | TCLD | 50 | ns | 4 | |||
| Clock Enable Time | TCLE | 50 | ns | 4 | |||
| Output Valid from Clock Low | TV | 100 | ns | 4.5V ≤ Vcc ≤ 5.5V | 4 | ||
| Output Valid from Clock Low | TV | 160 | ns | 2.5V ≤ Vcc < 4.5V | 4 | ||
| Output Hold Time | THO | 0 | ns | Note 1 | 4 | ||
| Output Disable Time | TDIS | 80 | ns | 4.5V ≤ Vcc ≤ 5.5V (Note 1) | 4 | ||
| Output Disable Time | TDIS | 160 | ns | 2.5V ≤ Vcc < 4.5V (Note 1) | 4 | ||
| HOLD Setup Time | THS | 40 | ns | 4.5V ≤ Vcc ≤ 5.5V | 4 | ||
| HOLD Setup Time | THS | 80 | ns | 2.5V ≤ Vcc < 4.5V | 4 | ||
| HOLD Hold Time | THH | 40 | ns | 4.5V ≤ Vcc ≤ 5.5V | 4 | ||
| HOLD Hold Time | THH | 80 | ns | 2.5V ≤ Vcc < 4.5V | 4 | ||
| HOLD Low to Output High-Z | THZ | 60 | ns | 4.5V ≤ Vcc ≤ 5.5V (Note 1) | 4 | ||
| HOLD Low to Output High-Z | THZ | 160 | ns | 2.5V ≤ Vcc < 4.5V (Note 1) | 4 | ||
| HOLD High to Output Valid | THV | 60 | ns | 4.5V ≤ Vcc ≤ 5.5V | 4 | ||
| HOLD High to Output Valid | THV | 160 | ns | 2.5V ≤ Vcc < 4.5V | 4 | ||
| Internal Write Cycle Time | TWC | 6 | ms | Note 2 | 4 | ||
| Endurance | 1 | M E/W Cycles | Page mode, +25°C, VCC = 5.5V (Note 3) | 4 | |||
| All inputs and outputs w.r.t. VSS | -0.6 | V | 3 | ||||
| Storage temperature | -65 | 155 | °C | 3 | |||
| Ambient temperature under bias | -40 | 150 | °C | Note 1 | 3 | ||
| ESD protection on all pins | 4 | kV | 3 | ||||
| Supply Voltage | VCC | 2.5 | 5.5 | V | Extended (H) grade operating range | 3 | |
| Ambient Temperature (Extended H) | TA | -40 | 150 | °C | Extended (H) grade | 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 | 17 |
CAD (KiCad official)
- Symbol:
25LC320A-I - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
25lc320a-i-etched.step/25lc320a-i-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);25lc320a-i.step/25lc320a-i.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (25 pp, sha256
efe3b8bd1904622c, retrieved 2026-10-20, tier: lcsc) - 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).