M27C256B集成電路（IC）的存儲(chǔ)器規(guī)格書(shū)PDF中文資料

M27C256B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M27C256B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。

Summary description

The M27C256B is a 256 Kbit EPROM offered in the two ranges UV (ultra violet erase) and OTP (one time programmable). It is ideally suited for microprocessor 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 M27C256B is offered in PDIP28 and PLCC32 packages.

LButtonIn order to meet environmental requirements, ST offers the M27C256B in ECOPACK? packages.

ECOPACK packages are Lead-free. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97.

The maximum ratings related to soldering conditions are also marked on the inner box label.

ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.

Feature summary

■ 5V ± 10 supply voltage in Read operation

■ Access time: 45ns

■ Low power consumption:

– Active Current 30mA at 5MHz

– Standby Current 100μA

■ Programming voltage: 12.75V ± 0.25V

■ Programming time: 100μs/Word

■ Electronic signature

– Manufacturer Code: 20h

– Device Code: 8Dh

■ ECOPACK? packages available