Transcription of 256 KBIT (32KB X8) UV EPROM AND OTP EPROM
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256 KBIT (32KB X8) UV EPROM AND OTP EPROM
M27C256B. 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM . 5V 10% SUPPLY VOLTAGE in READ. OPERATION. ACCESS TIME: 45ns LOW POWER CONSUMPTION: Active Current 30mA at 5 MHz 28 28. Standby Current 100 A. 1 1. PROGRAMMING VOLTAGE: PROGRAMMING TIME: 100 s/word FDIP28W (F) PDIP28 (B). ELECTRONIC SIGNATURE. Manufacturer Code: 20h Device Code: 8Dh DESCRIPTION. The M27C256B is a 256 Kbit EPROM offered in PLCC32 (C) TSOP28 (N). the two ranges UV (ultra violet erase) and OTP 8 x mm (one time programmable). It is ideally suited for mi- croprocessor systems and is organized as 32,768. by 8 bits. Figure 1. Logic Diagram 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.
M27C256B 2/16 Figure 2B. LCC Connections AI00757 A13 A8 A10 Q4 17 A0 NC Q0 Q1 Q2 DU Q3 A6 A3 A2 A1 A5 A4 9 A14 A9 1 V PP A11 Q6 A7 Q7 32 DU V …
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