Overview

The LE28F4001 Series ICs are 524288-word × 8-bit flash memory products that support on-board reprogramming and feature 5 V single-voltage power supply operation. CMOS peripheral circuits were adopted for high speed, low power, and ease of use. These products support a sector (256 bytes) erase function for fast data rewriting.

特性 Features

? Fabricated in a highly reliable 2-layer polysilicon CMOS flash EEPROM process.

? Read and write operation from a 5 V single-voltage power supply

? Sector erase function: 256 bytes per sector

? Fast access time: 150/200 ns

? Low power

— Operating current (read): 25 mA (maximum)

— Standby current: 20 μA (maximum)

? Highly reliable read and write operations

— Sector write cycles: 104 cycles

— Data retention time: 10 years

? Address and data latches

? Self-timer erase and programming

? Byte programming time: 35 μs (maximum)

? Write complete detection: Toggle bit and data polling

? Hardware and software data protection

? Pin assignment conforms to the JEDEC byte-wide EEPROM standard

? Packages

SOP 32-pin (525 mil) plastic package :LE28F4001M

TSOP 40-pin (10 × 14 mm) plastic package:LE28F4001T

TSOP 40-pin (10 × 14 mm) plastic package:LE28F4001R