Details

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BUY M27C256B-12F1 https://www.utsource.net/itm/p/12445122.html

Parameter	Description	Value
Device Type	Type of Device	256K x 8-bit UV-Erasable PROM
Part Number	Part Number	M27C256B-12F1
Manufacturer	Manufacturer	STMicroelectronics
Package	Package Type	28-Pin Plastic DIP
Operating Voltage	Supply Voltage Range (Vcc)	4.5V to 5.5V
Operating Temperature	Temperature Range (Tamb)	-40°C to +85°C
Access Time	Access Time (typical)	120 ns
Data Retention	Data Retention Time	10 years
Programming Voltage	Programming Voltage (Vpp)	12.5V to 13.0V
Erase Time	Typical Erase Time	30 seconds
Write Cycle	Typical Write Cycle Time	3 ms per byte
Endurance	Program/Erase Cycles	1,000 cycles
Pin Configuration	Pin Count	28
Storage Temperature	Storage Temperature Range	-65°C to +150°C

Instructions for Use

1. Power Supply:

   • Connect Vcc to the positive supply (4.5V to 5.5V).
   • Connect Vss to ground (0V).

2. Programming:

   • Apply 12.5V to 13.0V to the Vpp pin during programming.
   • Ensure the chip select (CS) is active low.
   • Use the address lines (A0-A17) to select the memory location.
   • Use the data lines (D0-D7) to input the data to be written.
   • Assert the write enable (WE) signal to initiate the write cycle.

3. Reading:

   • Apply 5V to Vcc and 0V to Vss.
   • Ensure the chip select (CS) is active low.
   • Use the address lines (A0-A17) to select the memory location.
   • The data will be available on the data lines (D0-D7) after the access time.

4. Erasing:

   • Expose the device to ultraviolet (UV) light for at least 30 seconds to erase the contents.
   • Ensure the device is not powered during the erasing process.

5. Handling:

   • Handle the device with care to avoid static discharge.
   • Store the device in a dry and cool environment to ensure long-term reliability.

6. Pinout:

   • Refer to the datasheet for the specific pinout configuration of the 28-Pin DIP package.

For detailed information and specific application notes, refer to the official datasheet provided by STMicroelectronics.

(For reference only)