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M27C512-25XN3E 데이터시트(PDF) 4 Page - STMicroelectronics |
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4 / 22 page M27C512 4/22 SUMMARY DESCRIPTION The M27C512 is a 512 Kbit EPROM offered in the two ranges UV (ultra violet erase) and OTP (one time programmable). It is ideally suited for applica- tions where fast turn-around and pattern experi- mentation are important requirements and is organized as 65536 by 8 bits. The FDIP28W (window ceramic frit-seal package) has transparent lid which allows the user to ex- pose the chip to ultraviolet light to erase the bit pat- tern. 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 M27C512 is offered in PDIP28, PLCC32 and TSOP28 (8 x 13.4 mm) packages. In addition to the standard versions, the packages are also available in Lead-free versions, in compli- ance with JEDEC Std J-STD-020B, the ST ECO- PACK 7191395 Specification, and the RoHS (Restriction of Hazardous Substances) directive. Figure 2. Logic Diagram Table 1. Signal Names A0-A15 Address Inputs Q0-Q7 Data Outputs E Chip Enable GVPP Output Enable / Program Supply VCC Supply Voltage VSS Ground NC Not Connected Internally DU Don’t Use AI00761B 16 Q0-Q7 VCC M27C512 GVPP VSS 8 A0-A15 E |
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