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

M87C257-90C1TR属于集成电路（IC） > 存储器。意法半导体（ST）集团制造生产的M87C257-90C1TR存储器存储器是集成电路上用作数据存储设备的半导体器件。这些器件分为非易失性或易失性两种，格式包括 CBRAM、DRAM、EEPROM、EERAM、EPROM、闪存、FRAM、NVSRAM、PCM (PRAM)、PSRAM、RAM 和 SRAM。这些器件的存储容量为 64 b 至 6 Tb 不等，接口有 I2C、MMC、并行、eMMC、串行、单线、SPI、UFS、Xccela 总线和 1-线。