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M27W256-100B6TR データシート(PDF) 1 Page - STMicroelectronics |
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M27W256-100B6TR データシート(HTML) 1 Page - STMicroelectronics |
1 / 15 page 1/15 March 2000 M27W256 256 Kbit (32Kb x 8) Low Voltage UV EPROM and OTP EPROM s 2.7V to 3.6V SUPPLY VOLTAGE in READ OPERATION s ACCESS TIME: –70ns at VCC = 3.0V to 3.6V –80ns at VCC = 2.7V to 3.6V s PIN COMPATIBLE with M27C256B s LOW POWER CONSUMPTION: –15 µA max Standby Current – 15mA max Active Current at 5MHz s PROGRAMMING TIME 100 µs/byte s HIGH RELIABILITY CMOS TECHNOLOGY – 2,000V ESD Protection – 200mA Latchup Protection Immunity s ELECTRONIC SIGNATURE – Manufacturer Code: 20h – Device Code: 3Dh DESCRIPTION The M27W256 is a low voltage 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 orga- nized as 32,768 by 8 bits. The M27W256 operates in the read mode with a supply voltage as low as 3V. The decrease in op- erating power allows either a reduction of the size of the battery or an increase in the time between battery recharges. The FDIP28W (window ceramic frit-seal package) has a 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 M27W256 is offered in PDIP28, PLCC32 and TSOP28 (8 x 13.4 mm) packages. Figure 1. Logic Diagram AI03629 15 A0-A14 Q0-Q7 VPP VCC M27W256 G E VSS 8 1 28 28 1 FDIP28W (F) PDIP28 (B) PLCC32 (K) TSOP28 (N) 8 x 13.4mm |
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同様の説明 - M27W256-100B6TR |
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