This datasheet introduces the features of the ROHM BR93C46/56/66 series, including 1.8-5.5V single-supply voltage, 16-bit serial EEPROM, 2MHz clock frequency, 10ms write time, automatic increment register address read mode, 1000000 write/erase cycles and 40-year data retention.
The BR93C46/56/66 series are 16‑bit serial EEPROMs offered in 1 Kb, 2 Kb and 4 Kb densities. They operate from a single 1.8 V to 5.5 V supply, feature a Microwire bus, low power consumption and a 40‑year data retention.
The document provides pin configurations, absolute maximum ratings, recommended operating conditions, electrical and AC characteristics, instruction set timing diagrams, and ordering information. It also includes a notice on usage restrictions and safety considerations.
| Supply Voltage | 1.8 V – 5.5 V |
|---|---|
| Supply Current | 2.0 mA (typical) |
| Standby Current | 30 µA (typical) |
| Input Leakage | 1.0 pA |
| Output Leakage | 1.0 µA |
| Input Low Voltage | -0.3 V – 0.8 V |
| Input High Voltage | 2.0 V – 5.5 V |
| Clock Frequency | 2 MHz |
| Write Time | 10 ms |
| Endurance | 1 000 000 write/erase cycles |
| Data Retention | 40 years |
It operates from 1.8 V up to 5.5 V.
The EEPROM is rated for 1,000,000 write/erase cycles.
Data is retained for up to 40 years.
It uses a Microwire bus interface.