Product Summary

The M27C256B-12F1 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-12F1 is offered in PDIP28 and PLCC32 packages. In order to meet environmental requirements, ST offers the M27C256B-12F1 in ECOPACK packages. ECOPACK packages are Lead-free. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label.

Parametrics

Absolute maximum ratings: (1)Ambient Operating Temperature, TA: –40 to 125℃; (2)Temperature Under Bias, TBIAS: –50 to 125℃; (3)Storage Temperature, TSstg: –65 to 150℃; (4)Input or Output Voltage (except A9), VIO: –2 to 7V; (5)Supply Voltage, VCC: –2 to 7V; (6)A9 Voltage, VA9: –2 to 13.5V; (7)Program Supply Voltage, VPP: –2 to 14V.

Features

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 of manufacturer Code: 20h; (7)Electronic signature of Device Code: 8Dh; (8)ECOPACK packages available.

Diagrams

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
M27C256B-12F1
M27C256B-12F1

STMicroelectronics

EPROM 256K (32KX8) 120ns

Data Sheet

Negotiable 
Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
M27C1001-10B1
M27C1001-10B1

STMicroelectronics

EPROM 1M (128Kx8) 100ns

Data Sheet

Negotiable 
M27C1001-10C1
M27C1001-10C1

STMicroelectronics

EPROM 1M (128Kx8) 100ns

Data Sheet

Negotiable 
M27C1001-10C6
M27C1001-10C6

STMicroelectronics

EPROM OTP 1Mx8

Data Sheet

Negotiable 
M27C1001-10F1
M27C1001-10F1

STMicroelectronics

EPROM 1M (128Kx8) 100ns

Data Sheet

Negotiable 
M27C1001-12B1
M27C1001-12B1

STMicroelectronics

EPROM 1M (128Kx8) 120ns

Data Sheet

Negotiable 
M27C1001-12C1
M27C1001-12C1

STMicroelectronics

EPROM 1M (128Kx8) 120ns

Data Sheet

Negotiable