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M27W401-200B6 데이터시트(PDF) 5 Page - STMicroelectronics |
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M27W401-200B6 데이터시트(HTML) 5 Page - STMicroelectronics |
5 / 23 page M27W401 Summary description 5/23 1 Summary description The M27W401 is a low voltage 4 Mbit EPROM offered in the two ranges UV (ultra violet erase) and OTP (one time programmable). It is ideally suited for microprocessor systems requiring large data or program storage and is organised as 524,288 by 8 bits. The M27W401 operates in the read mode with a supply voltage as low as 2.7V at –40 to 85°C temperature range. The decrease in operating power allows either a reduction of the size of the battery or an increase in the time between battery recharges. The FDIP32W (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 application where the content is programmed only one time and erasure is not required, the M27W401 is offered in PDIP32, PLCC32 and TSOP32 (8 x 20 mm) packages. In order to meet environmental requirements, ST offers the M27W401 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. See Figure 1: Logic Diagram and Table 1: Signal descriptions for a brief overview of the signals connected to this device. Figure 1. Logic Diagram AI01590 19 A0-A18 Q0-Q7 VPP VCC M27W401 G VSS 8 E |
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