The M27C1024 is a 1 Mbit EPROM offered in the two ranges UV (ultra violet erase) and OTP (one time programmable). It is ideally suited for micro-processor systems requiring large data or program storage and is organized as 65,536 words of 16 bits. The FDIP40W (window ceramic frit-seal package) has a transparent lid which allows the user to expose the chip to ultraviolet light to erase the bit pattern. A new pattern can then be written to the device by following the programming procedure. For application where the content is programmed only one time and erasure is not required, the M27C1024 is offered in PDIP40, PLCC44 and TSOP40 (10 x 14mm) packages.
The M27C1024 EPROM provides 1 Mbit (64 Kb × 16) storage and is offered in UV‑erasable and one‑time‑programmable (OTP) versions. It is supplied in FDIP40W, PDIP40, PLCC44 and TSOP40 packages, making it suitable for a wide range of micro‑processor systems.
The document lists absolute maximum ratings, electrical characteristics, pin configurations, and programming procedures. It describes read, standby, program, verify and electronic‑signature modes, as well as recommended decoupling and bulk capacitors for reliable operation.
| Memory size | 1 Mbit (64 Kb × 16) |
|---|---|
| Read supply voltage | 5 V ±10 % |
| Active current (read) | 35 mA at 5 MHz |
| Programming voltage | 12.75 V ±0.25 V |
| Programming time | 100 µs per byte (typical) |
| Operating temperature range | -40 °C to 125 °C |
The device uses a 5 V supply with a ±10 % tolerance for read mode.
Typical programming time is 100 µs per byte.