This datasheet introduces the characteristics of the X76F400 model of ICMIC company, which is a 64-bit password security, single array (496 bytes) two passwords (16 bytes) of the security serial flash. The main features include low power CMOS, 2.5~5.5V voltage range, high reliability endurance, 100000 times write cycle, 100 years data retention capacity.
The X76F400 is a password‑protected Secure Serial Flash device with a 3968‑bit (512 × 8‑bit) memory array. It supports a 2‑wire serial interface (SCL/SDA) and provides a synchronous response‑to‑reset that outputs a 32‑bit data stream. The device includes 64‑bit password security, an 8‑try retry counter, and endurance of 100 000 write cycles with a data retention of 100 years.
The document provides pin descriptions, electrical characteristics, operating temperature ranges, package options (8‑lead SOIC and TSSOP), and ordering information. It also explains command sets, program operations, password handling, and the response‑to‑reset behavior.
| Memory array size | 3968‑bit (512 × 8‑bit) |
|---|---|
| Password security | 64‑bit |
| Write endurance | 100,000 cycles |
| Data retention | 100 years |
| Supply voltage | 2.5 V to 5.5 V |
| Standby current | < 1 pA |
| Active current | < 3 mA |
| Package types | 8‑lead SOIC, TSSOP |
| Operating temperature (commercial) | 0 °C to +70 °C |
| Operating temperature (industrial) | -40 °C to +85 °C |
The X76F400 allows eight invalid password attempts; after the retry counter overflows the memory and passwords are cleared.
Password ACK polling uses the command code 0x55 (55h).