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部品型式

AT29C040A

製品説明
仕様・特性

Features • Fast Read Access Time – 90 ns • 5-volt Only Reprogramming • Sector Program Operation • • • • • • • • • • – Single Cycle Reprogram (Erase and Program) – 2048 Sectors (256 Bytes/Sector) – Internal Address and Data Latches for 256 Bytes Internal Program Control and Timer Hardware and Software Data Protection Two 16K Bytes Boot Blocks with Lockout Fast Sector Program Cycle Time – 10 ms DATA Polling for End of Program Detection Low Power Dissipation – 40 mA Active Current – 100 µA CMOS Standby Current Typical Endurance > 10,000 Cycles Single 5V ± 10% Supply CMOS and TTL Compatible Inputs and Outputs Green (Pb/Halide-free) Packaging Option 1. Description 4-megabit (512K x 8) 5-volt Only 256-byte Sector Flash Memory AT29C040A The AT29C040A is a 5-volt only in-system Flash Programmable and Erasable Read Only Memory (PEROM). Its 4 megabits of memory is organized as 524,288 words by 8 bits. Manufactured with Atmel’s advanced nonvolatile CMOS EEPROM technology, the device offers access times up to 90 ns, and a low 220 mW power dissipation. When the device is deselected, the CMOS standby current is less than 100 µA. The device endurance is such that any sector can typically be written to in excess of 10,000 times. The programming algorithm is compatible with other devices in Atmel’s 5-volt only Flash family. To allow for simple in-system reprogrammability, the AT29C040A does not require high input voltages for programming. Five-volt-only commands determine the operation of the device. Reading data out of the device is similar to reading from an EPROM. Reprogramming the AT29C040A is performed on a sector basis; 256 bytes of data are loaded into the device and then simultaneously programmed. During a reprogram cycle, the address locations and 256 bytes of data are internally latched, freeing the address and data bus for other operations. Following the initiation of a program cycle, the device will automatically erase the sector and then program the latched data using an internal control timer. The end of a program cycle can be detected by DATA polling of I/O7. Once the end of a program cycle has been detected, a new access for a read or program can begin. 0333K–FLASH–2/05

ブランド

OKI

現況

2008年10月1日 - OKIセミコンダクタ株式会社設立。同時に株式の95%の900億円をロームに譲渡。 2011年10月1日 - ラピスセミコンダクタ株式会社に社名変更 。

現ブランド

ラピスセミコンダクタ株式会社

会社名

沖電気工業

事業概要

通信機器、現金自動預け払い機 (ATM) 等の情報機器を主体に製造するメーカーである。2008年半導体部門はOKIセミコンダクタ株式会社とした。

供給状況

 
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