The document describes the features of M95320 and M95640 series 32Kbit and 64Kbit Serial SPI Bus EEPROMs in May 2005, including compatibility with SPI Bus Serial Interface, single supply voltage, multiple clock rates, write time, status register, hardware protection, self-timed programming cycle, adjustable size read-only EEPROM area, enhanced ESD protection, more than 100,000 or 1 million erase/write cycles, and more than 40-year data retention.
The handbook describes the M95320 (32 Kbit) and M95640 (64 Kbit) serial SPI EEPROM families, including the standard, wide‑voltage (‑W), reduced‑voltage (‑R) and low‑voltage (‑S) versions. It provides a feature summary, pin‑out information, and the electrical characteristics required for system integration.
Key sections cover signal descriptions, SPI bus connection guidelines, supported SPI modes, memory organization, package mechanical data, and absolute maximum ratings. The document also includes tables of operating conditions, timing diagrams, and ordering information.
| Supply Voltage (M95320, M95640) | 4.5 V to 5.5 V |
|---|---|
| Supply Voltage (M95320‑W, M95640‑W) | 2.5 V to 5.5 V |
| Supply Voltage (M95320‑R, M95640‑R) | 1.8 V to 5.5 V |
| Supply Voltage (M95320‑S, M95640‑S) | 1.65 V to 5.5 V |
| Maximum Clock Rate | 20 MHz |
| Write Time | 5 ms or 10 ms |
| Erase/Write Cycles | ≥ 100 000 (or 1 million depending on options) |
| Data Retention | ≥ 40 years |
The M95320‑R (and M95640‑R) requires a supply voltage between 1.8 V and 5.5 V.
Both CPOL=0/CPHA=0 and CPOL=1/CPHA=1 modes are supported; data is latched on the rising edge and output on the falling edge of the clock.
The devices support clock rates up to 20 MHz.