Key facts
- Brand
- STMicroelectronics
- Model
- M95320
- Industry
- Industrial
- Documents
- 5
- Languages
- EN
- Last added
- 2012-06-05
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STMicroelectronics M95640/M95320 64Kbit/32Kbit Serial SPI EEPROM Datasheet
This document describes the M95640 (64kbit) and M95320 (32Kbit) electrically erasable programmable memory devices. These chips are accessed via a high-speed Serial Peripheral Interface (SPI)-compatible bus, supporting positive clock SPI modes with adjustable clock rates up to 10MHz.
The datasheet details the device features including hardware protection of the status register, byte and page write capabilities, self-timed programming cycles, and enhanced ESD protection. It provides comprehensive information on operating conditions, electrical characteristics, timing diagrams, and mechanical package data for various pin configurations.
STMicroelectronics M95320 specifications
| Memory Capacity (M95640) | 8192 x 8 bit |
|---|---|
| Memory Capacity (M95320) | 4096 x 8 bit |
| Supply Voltage (Standard) | 4.5 to 5.5V |
| Supply Voltage (-W variant) | 2.5 to 5.5V |
| Supply Voltage (-R variant) | 1.8 to 5.5V |
| Max Clock Rate | 10MHz |
| Write Time | 5ms or 10ms |
| Erase/Write Cycles | >100,000 or >1 million |
| Data Retention | >40 Years |
Source: STMicroelectronics M95640/M95320 64Kbit/32Kbit Serial SPI EEPROM Datasheet
All STMicroelectronics M95320 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
- STMicroelectronics M95640/M95320 64Kbit/32Kbit Serial SPI EEPROM Datasheet 40 p
- ST M95320 M95320-W M95320-R M95320-S M95640 M95640-W M95640-R M95640-S Data Sheet 43 p
- ST M95320/M95320-W/M95320-R/M95320-S/M95640/M95640-W/M95640-R/M95640-S Manual 42 p
- STMicroelectronics M95320/M95640 EEPROM Handbook 43 p
- STMICROELECTRONICS - M95320 M95320-W M95320-R M95320-S M95640 M95640-W M95640-R M95640-S handbook 42 p
Questions answered in these manuals
What SPI modes are supported by these devices?
The devices support CPOL=0, CPHA=0 and CPOL=1, CPHA=1 modes.
From: STMicroelectronics M95640/M95320 64Kbit/32Kbit Serial SPI EEPROM Datasheet
How is data shifted out of the device?
Output data bytes are shifted out most significant bit first on the falling edge of the Serial Clock.
From: STMicroelectronics M95640/M95320 64Kbit/32Kbit Serial SPI EEPROM Datasheet
What are the available clock rates for these EEPROMs?
The devices support clock rates of 20MHz, 10MHz, 5MHz, or 2MHz.
From: ST M95320 M95320-W M95320-R M95320-S M95640 M95640-W M95640-R M95640-S Data Sheet
What is the write time for these devices?
The write time is either 5ms or 10ms depending on the specific configuration.
From: ST M95320 M95320-W M95320-R M95320-S M95640 M95640-W M95640-R M95640-S Data Sheet
What supply voltage ranges are supported for the M95320 and M95640 EEPROMs?
They operate from 4.5 V to 5.5 V for the standard versions, with lower‑voltage options for the ‑W, ‑R, and ‑S variants.
From: ST M95320/M95320-W/M95320-R/M95320-S/M95640/M95640-W/M95640-R/M95640-S Manual
Which clock rates can be used with these EEPROM devices?
The devices support clock rates of 2 MHz, 5 MHz, 10 MHz, or 20 MHz.
From: ST M95320/M95320-W/M95320-R/M95320-S/M95640/M95640-W/M95640-R/M95640-S Manual