M87C257屬于集成電路（IC）的存儲(chǔ)器。由意法半導(dǎo)體集團(tuán)制造生產(chǎn)的M87C257存儲(chǔ)器存儲(chǔ)器是集成電路上用作數(shù)據(jù)存儲(chǔ)設(shè)備的半導(dǎo)體器件。這些器件分為非易失性或易失性兩種，格式包括 CBRAM、DRAM、EEPROM、EERAM、EPROM、閃存、FRAM、NVSRAM、PCM (PRAM)、PSRAM、RAM 和 SRAM。這些器件的存儲(chǔ)容量為 64 b 至 6 Tb 不等，接口有 I2C、MMC、并行、eMMC、串行、單線、SPI、UFS、Xccela 總線和 1-線。

Description

The M87C257 is a 256 Kbit EPROM offered in the two ranges UV (ultra violet erase) and LButtonOTP (one time programmable). It incorporates latches for all address inputs to minimize chip count, reduce cost, and simplify the design of multiplexed bus systems and is organized as 32,768 by 8 bits.

The FDIP28W (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 applications where the content is programmed only one time and erasure is not required, the M87C257 is offered in PLCC32 package.

Feature summary

■ 5V ± 10 supply voltage in Read operation

■ Integrated address latch

■ Access time: 45ns

■ Low power consumption:

– Active Current 30mA

– Standby Current 100μA

■ Programming voltage: 12.75V ± 0.25V

■ Programming times of around 3s

■ Electronic signature

– Manufacturer Code: 20h

– Device Code: 80h

■ ECOPACK? packages available