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STMicroelectronics Electronic Components Datasheet

M27C256B Datasheet

256 Kbit (32Kb x 8) UV EPROM and OTP EPROM

No Preview Available !

M27C256B
256 Kbit (32Kb × 8) UV EPROM and OTP EPROM
Feature summary
5V ± 10% supply voltage in Read operation
Access time: 45ns
Low power consumption:
– Active Current 30mA at 5MHz
– Standby Current 100µA
Programming voltage: 12.75V ± 0.25V
Programming time: 100µs/Word
Electronic signature
– Manufacturer Code: 20h
– Device Code: 8Dh
ECOPACK® packages available
28
1
FDIP28W (F)
28
1
PDIP28 (B)
PLCC32 (C)
May 2006
Rev 2
1/24
www.st.com
1


STMicroelectronics Electronic Components Datasheet

M27C256B Datasheet

256 Kbit (32Kb x 8) UV EPROM and OTP EPROM

No Preview Available !

Contents
Contents
M27C256B
1 Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Device operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 Read mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Standby mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Two-line output control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4 System considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.5 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.6 PRESTO II programming algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.7 Program inhibit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.8 Program Verify . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.9 Electronic signature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.10 Erasure operation (applies for UV EPROM) . . . . . . . . . . . . . . . . . . . . . . . 11
3 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4 DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5 Package mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2/24


Part Number M27C256B
Description 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM
Maker STMicroelectronics
Total Page 24 Pages
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