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- STMicroelectronics
- Model
- M95640-W
- Industry
- Industrial
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- 4
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- 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-W 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-W 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
- 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 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 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