M29F040 is a 4 Mbit (512Kb x8, Uniform Block) Single Supply Flash Memory with a 5V ± 10% supply voltage, fast read speed, short erase time, block erase mode, 100,000 erase cycles, and a long service life of 20 years.
The M29F040 flash memory provides 4 Mbit (512 Kb × 8) storage organized as eight uniform 64 KB blocks. It is offered in PLCC32 and TSOP32 (8 × 20 mm) packages, with both normal and reverse pinouts.
Key features include a fast 70 ns access time, typical byte‑programming time of 10 µs, block erase time of 1 s, chip erase time of 2.5 s, and a low‑power standby mode. The device supports up to 100 k program/erase cycles per block, 20‑year data retention, and includes block‑protect, suspend/resume, and electronic‑signature functions.
| Fast Access Time | 70 ns |
|---|---|
| Byte Programming Time | 10 µs typical |
| Block Erase Time | 1.0 s typical |
| Chip Erase Time | 2.5 s typical |
| Program/Erase Cycles per Block | 100,000 |
| Data Retention | 20 years |
| Supply Voltage | 0.6 V to 7 V |
| Storage Temperature | -65 °C to 150 °C |
| Manufacturer Code | 20h |
| Device Code | E2h |
| Uniform Blocks | 8 blocks of 64 KB each |
The device contains eight uniform blocks, each 64 KB in size.
Typical byte‑programming time is 10 µs.
The flash memory operates from 0.6 V up to 7 V.
The manufacturer code is 20h and the device code is E2h.