M87C257 256千比特(32KB x8 )紫外可擦写可编程只读存储器和OTP存储器
The M27C801 is an 8 Mbit EPROM offered in the two ranges UV (ultra violet erase) and OTP (one time programmable). It is ideally suited for applications where fast turn-around and pattern experimentation are important requirements and is organized as 1,048,576 by 8 bits.
The FDIP32W (window ceramic frit-seal package) has 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 M27C801 is offered in PDIP32 and PLCC32 packages.
In order to meet environmental requirements, ST offers the M27C801 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.
M87C257 特性:
- 5 V ± 10% supply voltage in Read operation
- Access time: 55 ns
- low Power Consumption:
– Active current: 35 mA at 5 MHz
– Standby current: 100 μA - Programming voltage: 12.75 V ± 0.25 V
- Programming time: 50 μs/word
- Electronic signature
– Manufacturer code: 20h
– Device code: 42h - ECOPACK? packages available
M87C257 技术支持与电子电路设计开发资源下载
- M87C257 数据手册DataSeet下载.PDF
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