Key facts
- Brand
- Atmel
- Model
- AT29C040A
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-04-11
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ATMEL 4-megabit (512K x 8) 5-volt Only 256-byte Sector Flash Memory AT29C040A Manual
The AT29C040A is a 5‑volt‑only in‑system flash programmable and erasable read‑only memory (PEROM) organized as 4 Mbits (512 K × 8). It provides fast 90 ns read access, low active current (40 mA) and ultra‑low standby current (100 pA), and can endure over 10 000 program cycles per sector. The device includes hardware and software data‑protection features, boot‑block lockout, and a product‑identification mode.
The datasheet details pin configurations for 32‑lead PLCC and TSOP packages, block diagram, device operation (read, byte load, program), timing specifications, absolute maximum ratings, and electrical characteristics such as input/output voltage levels and leakage currents. Package dimensions and mechanical drawings are also provided.
Atmel AT29C040A specifications
| Read Access Time | 90 ns |
|---|---|
| Supply Voltage | 5 V ±10% |
| Sector Size | 256 Bytes |
| Number of Sectors | 2048 |
| Active Current | 40 mA |
| Standby Current | 100 pA |
| Endurance | >10,000 cycles per sector |
| Input High Voltage (TTL) | 2.0 V |
| Output High Voltage (CMOS) | 4.2 V |
Source: ATMEL 4-megabit (512K x 8) 5-volt Only 256-byte Sector Flash Memory AT29C040A Manual
All Atmel AT29C040A documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the sector size of the AT29C040A?
Each sector contains 256 bytes of memory.
From: ATMEL 4-megabit (512K x 8) 5-volt Only 256-byte Sector Flash Memory AT29C040A Manual
How can the end of a program cycle be detected?
The device uses DATA polling; the I/O6 pin toggles until the program cycle completes, after which valid data is presented.
From: ATMEL 4-megabit (512K x 8) 5-volt Only 256-byte Sector Flash Memory AT29C040A Manual
What supply voltage does the AT29C040A require?
The device operates from a 5 V supply with a tolerance of +10 %.
How many sectors does the AT29C040A have and what is the sector size?
It contains 2048 sectors, each 256 bytes in size.