ACE25C400

4MB Serial Flash Memory

VER 1.2

1

Description

The ACE25C400 is a 4M-bit (512K-byte) Serial Flash memory, with advanced write protection mechanisms. The

ACE25C400 supports the standard Serial Peripheral Interface (SPI), and a high performance Dual output as well as

Dual I/O.

The ACE25C400 can be programmed 1 to 512 bytes at a time, using the Page Program instruction. It is designed to

allow either single Sector/Block at a time or full chip erase operation. The ACE25C400 can be configured to protect part

of the memory as the software protected mode. The device can sustain a minimum of 100K program/erase cycles on

each sector or block.

Features

 4Mbit of Flash memory

- 128 uniform sectors with 4K-byte each

- 8 uniform block with 64K-byte each

- 256 bytes per programmable page

 Wide Operation Range

- 2.7V~3.6V single voltage supply

- Industrial temperature range

 Serial Interface

- Standard SPI: CLK, CS#, DI, DO, WP#

- Continuous READ mode support

 High Performance

- Max FAST_READ clock frequency: 100MHz

- Max READ clock frequency: 66MHz

- Typical page program time: 1.5ms

- Typical sector erase time: 90ms

- Typical block erase time: 500ms

- Typical chip erase time: 3.5s

 Low Power Consumption

- Typical standby current: 1µA

 Security

- Software and hardware write protection

- Lockable 256-Byte OTP security sectors

- Low Voltage Write Inhibit

 High Reliability

- Endurance: 100,000program/erase cycles

- Data retention: 20years