Skip to main content
Log in
Microchip Technology 93C46B-I/SN — Memory (DRAM / SRAM / Flash / EEPROM)

Microchip 93C46B-I/SN 1Kbit Microwire EEPROM, 2 MHz, 8-SOIC

MPN93C46B-I/SN
Active

Microchip 93C46B-I/SN, 1Kbit serial EEPROM, Microwire interface, 2 MHz clock, 64 x 16 organization, 4.5V–5.5V supply, -40°C to 85°C, 8-SOIC package, Tube.

$0.3000Ref. price · indicative, final on quote
Microchip Technology 93C46B-I/SN datasheet (PDF)
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

93C46B-I/SN specifications
ParameterValue
Memory typeNon-Volatile
MountingSurface Mount
Voltage4.5V ~ 5.5V
Frequency2 MHz
Memory interfaceMicrowire
Operating temperature-40°C~85°C(TA)
PackageTube
TechnologyEEPROM
Memory size1Kbit
Memory formatEEPROM
Case8-SOIC (0.154\", 3.90mm Width)
Memory organization64 x 16
Write cycle time - word, page2ms

Product details

The Microchip 93C46B-I/SN is a 1Kbit non-volatile serial EEPROM using the Microwire 3-wire interface, organized as 64 words of 16 bits each.

5V supply rail – no 3.3V operation

The supply range is 4.5V to 5.5V, so this part will not operate on a 3.3V logic rail. If your design runs a 3.3V MCU, you need a level translator on the Microwire lines or a different EEPROM that supports a lower Vcc. The 2 MHz clock is the maximum; actual throughput depends on the host controller's Microwire timing and the 2 ms write-cycle time per word or page.

Frequently asked questions

Is the 93C46B-I/SN equivalent to the 93C46A-I/SN?

Both are 1Kbit Microwire EEPROMs in the same 8-SOIC package with the same 2 MHz clock and 4.5V–5.5V supply. The difference is memory organization: the 93C46B-I/SN is 64 x 16 bits (word-wide), while the 93C46A-I/SN is 128 x 8 bits (byte-wide). If your host expects byte addressing, use the 93C46A-I/SN; if it writes 16-bit words, the 93C46B-I/SN is the correct fit.

Can the 93C46B-I/SN work at 3.3V?

No. The specified supply range is 4.5V to 5.5V. Operating it at 3.3V is outside the guaranteed operating conditions and will not reliably read or write the memory array.

What is the memory organization of the 93C46B-I/SN?

The memory is organized as 64 words of 16 bits each (64 x 16), for a total of 1Kbit.