Key facts
- Brand
- STMicroelectronics
- Model
- M95640
- Industry
- Industrial
- Documents
- 6
- Languages
- EN
- Last added
- 2012-08-09
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ST M95640 M95640-W M95640-R M95640-DR 64 Kbit serial SPI bus EEPROMs with high-speed clock handbook
This document is a datasheet for the M95640, M95640-W, M95640-R, and M95640-DR series of 64 Kbit (8 Kbytes) electrically erasable programmable memory (EEPROM) devices. These devices are accessed via a high-speed Serial Peripheral Interface (SPI) bus and support a clock frequency of up to 20 MHz. They operate with a single supply voltage ranging from 1.8 V to 5.5 V and offer more than 1 million write cycles with over 40-year data retention. The M95640-DR variant includes an additional 32-byte Identification Page that can be permanently locked in read-only mode.
Read onlineSTMicroelectronics M95640 specifications
| Memory array size | 64 Kb (8 Kbytes) |
|---|---|
| Page size | 32 bytes |
| Write cycle time (Byte/Page) | within 5 ms |
| Maximum clock frequency | 20 MHz |
| Supply voltage range | 1.8 V to 5.5 V |
| Write cycles endurance | More than 1 million |
| Data retention | More than 40-year |
Source: ST M95640 M95640-W M95640-R M95640-DR 64 Kbit serial SPI bus EEPROMs with high-speed clock handbook
All STMicroelectronics M95640 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
- ST M95640 M95640-W M95640-R M95640-DR 64 Kbit serial SPI bus EEPROMs with high-speed clock handbook 48 p
- 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 is the memory organization of the M95640?
The devices are 64 Kbit devices organized as 8192 × 8 bits.
From: ST M95640 M95640-W M95640-R M95640-DR 64 Kbit serial SPI bus EEPROMs with high-speed clock handbook
Does the M95640-DR have an identification page?
Yes, it offers an additional page named the Identification Page (32 bytes) which can be written and later permanently locked.
From: ST M95640 M95640-W M95640-R M95640-DR 64 Kbit serial SPI bus EEPROMs with high-speed clock handbook
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