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24AA256-E

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Microchip Tech Pre-ordered Chips, MSOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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24AA256-E

Microchip Tech · Pre-ordered Chips · MSOP-8

24AA256-E from Microchip Tech, in a MSOP-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 NC unconnected A0 is not connected on the MSOP package; the datasheet states pins A0 and A1 are no connects for the MSOP package only.
2 NC unconnected A1 is not connected on the MSOP package; the datasheet states pins A0 and A1 are no connects for the MSOP package only.
3 A2 input User-configurable chip address input that must be connected to either VCC or VSS; up to two devices can share the bus in the MSOP package.
4 VSS power_in Ground.
5 SDA bidirectional Open-drain bidirectional serial address/data I/O that requires a pull-up resistor to VCC (typical 10 kΩ for 100 kHz, 2 kΩ for 400 kHz and 1 MHz).
6 SCL input Serial clock input used to synchronize data transfer to and from the device.
7 WP input Write-protect input that must be tied to VSS (write operations enabled) or VCC (write operations inhibited, reads unaffected).
8 VCC power_in Power supply, 1.7V to 5.5V for 24AA256 and 24FC256, 2.5V to 5.5V for 24LC256.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package MSOP-8
Category Interface ICs
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 3
Ambient temperature with power applied -40 125 °C 3
ESD protection on all pins 4 kV 3
Operating supply voltage (Extended) VCC 1.7 5.5 V Extended (E) 3
Operating temperature (Extended) TA -40 125 °C Extended (E) 3
High-Level Input Voltage VIH 0.7 VCC 3
Low-Level Input Voltage VIL 0.3 VCC VCC ≥ 2.5V 3
Low-Level Input Voltage VIL 0.2 VCC VCC < 2.5V 3
Hysteresis of Schmitt Trigger Inputs (SDA, SCL) VHYS 0.05 VCC VCC ≥ 2.5V (Note) 3
Low-Level Output Voltage VOL 0.4 V IOL = 3.0 mA @ VCC = 4.5V; IOL = 2.1 mA @ VCC = 2.5V 3
Input Leakage Current ILI -1 1 µA VIN = VSS or VCC 3
Output Leakage Current ILO -1 1 µA VOUT = VSS or VCC 3
Pin Capacitance (all inputs/outputs) CIN, COUT 10 pF VCC = 5.0V (Note), TA = 25°C, FCLK = 1 MHz 3
Read Operating Current ICC 400 µA VCC = 5.5V, SCL = 400 kHz 3
Write Operating Current ICC 3 mA VCC = 5.5V 3
Standby Current (E-Temp) ICCS 5 µA SDA = SCL = VCC = 5.5V, A0, A1, A2, WP = VSS, E-Temp. 3
Clock Frequency FCLK 100 kHz 1.7V ≤ VCC < 2.5V 4
Clock Frequency FCLK 400 kHz 2.5V ≤ VCC ≤ 5.5V 4
Clock High Time THIGH 4000 ns 1.7V ≤ VCC < 2.5V 4
Clock High Time THIGH 600 ns 2.5V ≤ VCC ≤ 5.5V 4
Clock Low Time TLOW 4700 ns 1.7V ≤ VCC < 2.5V 4
Clock Low Time TLOW 1300 ns 2.5V ≤ VCC ≤ 5.5V 4
SDA and SCL Rise Time TR 1000 ns 1.7V ≤ VCC < 2.5V (Note 1) 4
SDA and SCL Rise Time TR 300 ns 2.5V ≤ VCC ≤ 5.5V (Note 1) 4
SDA and SCL Fall Time TF 300 ns All except 24FC256 (Note 1) 4
Start Condition Hold Time THD:STA 4000 ns 1.7V ≤ VCC < 2.5V 4
Start Condition Hold Time THD:STA 600 ns 2.5V ≤ VCC ≤ 5.5V 4
Start Condition Setup Time TSU:STA 4700 ns 1.7V ≤ VCC < 2.5V 4
Start Condition Setup Time TSU:STA 600 ns 2.5V ≤ VCC ≤ 5.5V 4
Data Input Hold Time THD:DAT 0 ns Note 2 4
Data Input Setup Time TSU:DAT 250 ns 1.7V ≤ VCC < 2.5V 4
Data Input Setup Time TSU:DAT 100 ns 2.5V ≤ VCC ≤ 5.5V 4
Stop Condition Setup Time TSU:STO 4000 ns 1.7V ≤ VCC < 2.5V 4
Stop Condition Setup Time TSU:STO 600 ns 2.5V ≤ VCC ≤ 5.5V 4
WP Setup Time TSU:WP 4000 ns 1.7V ≤ VCC < 2.5V 5
WP Setup Time TSU:WP 600 ns 2.5V ≤ VCC ≤ 5.5V 5
WP Hold Time THD:WP 4700 ns 1.7V ≤ VCC < 2.5V 5
WP Hold Time THD:WP 1300 ns 2.5V ≤ VCC ≤ 5.5V 5
Output Valid from Clock TAA 3500 ns 1.7V ≤ VCC < 2.5V (Note 2) 5
Output Valid from Clock TAA 900 ns 2.5V ≤ VCC ≤ 5.5V (Note 2) 5
Bus Free Time TBUF 4700 ns 1.7V ≤ VCC < 2.5V 5
Bus Free Time TBUF 1300 ns 2.5V ≤ VCC ≤ 5.5V 5
Output fall time from VIH min to VIL max TOF 250 ns CB ≤ 100 pF, All except 24FC256 (Note 1) 5
Input Filter Spike Suppression (SDA, SCL) TSP 50 ns All except 24FC256 (Notes 1 and 3) 5
Write Cycle Time (byte or page) TWC 5 ms 5
Endurance 1e+06 cycles 25°C, 5.5V, Page mode (Note 4) 5

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 24

CAD (KiCad official)

  • Symbol: 24AA256-E
  • Footprint: Package_SO:MSOP-8_3x3mm_P0.65mm
  • 3D model: MSOP-8 (KiCad packages3D, STEP)
  • 3D model files: 24aa256-e-etched.step / 24aa256-e-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 24aa256-e.step / 24aa256-e.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (42 pp, sha256 c3e15126019e056f, retrieved 2026-10-26, 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