M29F040B is a single power flash memory of 4Mbit(512Kb x8, Uniform Block) produced by Infineon.
The M29F040B is a 4 Mbit (512 Kb × 8) single‑supply flash memory from STMicroelectronics. It operates from a 5 V ±10 % supply and supports read, program and erase operations with block‑level protection.
The document provides absolute maximum ratings, bus operation details, command sequences, timing characteristics, endurance data, and package dimensions for the TSOP32, PLCC32 and PDIP32 versions.
| Memory size | 4 Mbit (512 Kb × 8) |
|---|---|
| Supply voltage | 5 V ±10 % |
| Access time | 45 ns |
| Program/Erase endurance per block | 100,000 cycles |
| Data retention | 20 years |
| Operating temperature range | -40 °C to 125 °C |
| Storage temperature range | -65 °C to 150 °C |
| Package types | TSOP32, PLCC32, PDIP32 |
The device operates from a single 5 V supply with a tolerance of ±10 %.
Each memory block is rated for 100,000 program/erase cycles.
The access time is specified as 45 nanoseconds.