M27C256B-10F1L

Product Summary

The M27C256B is a 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 organized as 32,768 by 8 bits.The FDIP28W (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 applications where the content is programmed only one time and erasure is not required, the M27C256B is offered in PDIP28, PLCC32 and TSOP28 (8 x 13.4 mm) packages.

Parametrics

Absolute Maximum Ratings (Note1):
(1)TA, Ambient Operating Temperature (note3):-40℃ to 125 ℃;
(2)TBIAS, Temperature Under Bias:-50℃ to 125℃;
(3)TSTG, Storage Temperature:-65℃ to 150℃;
(4)VIO(note2), Input or Output Voltage (except A9):-2 to 7 V;
(5)VCC, Supply Voltage:-2 to 7 V;
(6)VA9(note2), A9 Voltage:-2 to 13.5 V;
(7)VPP, Program Supply Voltage:-2 to 14 V
Note:
1. Except for the rating "Operating Temperature Range", stresses above those listed in the Table "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and other relevant quality documents.
2. Minimum DC voltage on Input or Output is –0.5V with possible undershoot to –2.0V for a period less than 20ns. Maximum DC voltage on Output is VCC +0.5V with possible overshoot to VCC +2V for a period less than 20ns.
3. Depends on range.

Features

(1)5V ± 10% SUPPLY VOLTAGE in READ OPERATION;
(2)ACCESS TIME: 45ns;
(3)LOW POWER CONSUMPTION:Active Current 30mA at 5MHz;Standby Current 100μA;
(4)PROGRAMMING VOLTAGE: 12.75V ± 0.25V;
(5)PROGRAMMING TIME: 100μs/word;
(6)ELECTRONIC SIGNATURE:Manufacturer Code: 20h;Device Code: 8Dh

Diagrams

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