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Microchip Technology 11LC040-I/SN — Memory (DRAM / SRAM / Flash / EEPROM)

Microchip 11LC040-I/SN EEPROM, 4Kbit Single-Wire, 8-SOIC

MPN11LC040-I/SN
End of Life

Microchip 11LC040-I/SN, 4Kbit serial EEPROM, single-wire interface, 512 x 8 organization, 100 kHz clock, 2.5V to 5.5V supply, -40°C to 85°C, 8-SOIC package, Tube.

$0.32Ref. price · indicative, final on quote
Microchip Technology 11LC040-I/SN datasheet (PDF)
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

11LC040-I/SN specifications
ParameterValue
Memory typeNon-Volatile
MountingSurface Mount
Supply voltage2.5V ~ 5.5V
Clock frequency100 kHz
Memory interfaceSingle Wire
Operating temperature-40°C ~ 85°C (TA)
PackageTube
TechnologyEEPROM
Memory size4Kbit
Memory formatEEPROM
Case8-SOIC (0.154\", 3.90mm Width)
Memory organization512 x 8
Write cycle time - word, page5ms

Product details

Single-wire EEPROM for GPIO-constrained designs

The Microchip 11LC040-I/SN is a 4Kbit serial EEPROM that communicates over a single-wire interface — data and clock share one pin. That frees up GPIO on small-package MCUs or when every I/O line is already allocated. Organized as 512 x 8 bits, it stores calibration tables, device configuration, or serial numbers without tying up an I²C or SPI bus. The 100 kHz clock rate is typical for single-wire parts — fine for infrequent reads and writes of small data blocks.

Microchip lists the 11LC040-I/SN as Active. ROHS3 compliant, so it passes into EU and RoHS-regulated markets without exemption paperwork.

Surface-mount 8-SOIC, tube delivery

Packaged in an 8-pin SOIC (3.90 mm body width) for surface-mount assembly. Shipped in tube form — factor that into your pick-and-place feeder setup if your line expects tape-and-reel for this footprint.

Frequently asked questions

What interface protocol does 11LC040-I/SN use?

It uses a single-wire interface — data and clock are combined on one pin, unlike I²C or SPI which need two or more signal lines.

Is 11LC040-I/SN RoHS compliant?

Yes, it is ROHS3 compliant per Microchip's lifecycle data.

What is the memory size and organization of 11LC040-I/SN?

4Kbit total, organized as 512 x 8 bits.

When sourcing 11LC040-I/SN, what's the closest functional second-source?

The AT24C04C-XHM-B is a 4Kbit I²C EEPROM with similar supply range and temperature grade, but it uses a two-wire I²C interface rather than single-wire — the bus protocol differs, so a firmware change is required.