93C46WP PDF Datasheet – 3-Wire Serial EEPROM (Memory)

This is one of the EEPROM types.

Part Number: 93C46WP

Function: 3-Wire Serial EEPROM

Package: SOP 8 Pin Type

Manufacturer: FMD, ST


93C46WP pdf datasheet

User Selectable Internal Organization:

0. 93C46WP: 1Kbit

1. FT93C46: 128 x 8 or 64 x 16

2. FT93C56: 256 x 8 or 128 x 16

3. FT93C66: 512 x 8 or 256 x 16


93C46WP is 1Kbit, MICROWIRE Serial Access EEPROM. These electrically erasable programmable memory (EEPROM) devices are accessed through a Serial Data Input (D) and Serial Data Output (Q)
using the MICROWIRE bus protocol.

The FT93C46/56/66 series are 1024/2048/4096 bits of serial Electrical Erasable and Programmable Read Only Memory, commonly known as EEPROM. They are organized as 64/128/256 words of 16 bits each when the ORG pin is connected to VCC (or unconnected) and 128/256/512 words of 8 bits (1 byte) each when the ORG pin is tied to ground. The devices are fabricated with proprietary advanced CMOS process for low power and low voltage applications. These devices are available in standard 8-lead PDIP, 8-lead JEDEC SOIC and 8-lead TSSOP packages. Our extended VCC range (1.8V to 5.5V) devices enables wide spectrum of applications.

Marking Informations:

93C46WP memory


1. 2 MHz Clock Rate (5V) Compatibility.

2. Industry Standard 3-wire Serial Interface.

3. Self-Timed ERASE/WRITE Cycles (5ms max including auto-erase).

4. Automatic ERAL before WRAL.

5. Sequential READ Function.

6.  High Reliability: Typical 1 Million Erase/Write Cycle Endurance.

93C46WP Datasheet

93C46WP pdf



4256BWP Datasheet PDF – 256-Kbit serial I2C bus EEPROM

This post describes for the EEPROM.

The part number is 4256BWP, M24256-BW.

The function of this semiconductor is 256-Kbit serial I2C bus EEPROM.

The package is SOP 8 Pin Type

The manufacturer of this part is STMicroelectronics.

See the preview image and the Datasheet PDF file for more information.

4256BWP pinout datasheet


Serial EEPROMs are commonly used in a wide range of applications, including embedded systems, consumer electronics, automotive electronics, and industrial equipment. They provide non-volatile storage for settings, calibration data, user preferences, and other important information in electronic devices.

The 4256BWP is a 256-Kbit I2C-compatible EEPROM (Electrically Erasable PROgrammable
Memory) organized as 32 K × 8 bits. The M24256-BW can operate with a supply voltage from 2.5 V to 5.5 V, the M24256-BR and M24256-DR can operate with a supply voltage from 1.8 V to 5.5 V, and the M24256-BF and M24256-DF can operate with a supply voltage from 1.7 V to 5.5 V. All these devices operate with a clock frequency of 1 MHz (or less), over an ambient temperature range of –40 °C / +85 °C.

The M24256-D offers an additional page, named the Identification Page (64 bytes). The Identification Page can be used to store sensitive application parameters which can be (later) permanently locked in Read-only mode.


42568WP Marking

42568WP Marking


• Compatible with all I2C bus modes: – 1 MHz – 400 kHz – 100 kHz

• Memory array: – 256 Kbit (32 Kbytes) of EEPROM – Page size: 64 bytes – Additional Write lockable page (M24256-D order codes)

• Single supply voltage and high speed: – 1 MHz clock from 1.7 V to 5.5 V

• Write: – Byte Write within 5 ms – Page Write within 5 ms

• Operating temperature range: – from -40 °C up to +85 °C

• Random and sequential Read modes • Write protect of the whole memory array

• Enhanced ESD/Latch-Up protection

• More than 4 million Write cycles

• More than 200-years data retention Packages


4256BWP datasheet pdf

4256BWP Datasheet PDF