Details

---

BUY AT29C256-20PC https://www.utsource.net/itm/p/299855.html
x8 Flash EEPROM

Parameter	Description	Value
Device Type	32K x 8 Flash Memory	-
Package	28-Pin Plastic DIP (PDIP)	-
Operating Voltage (Vcc)	Supply Voltage Range	4.5 V to 5.5 V
Standby Current	Current Consumption in Standby Mode	1 μA (max)
Active Current	Current Consumption during Read/Write Operations	30 mA (max)
Access Time	Time Required for a Read or Write Operation	200 ns (max)
Programming Voltage	Voltage Required for Programming	12.5 V
Erase/Program Cycle	Number of Erase/Program Cycles Supported	100,000 (min)
Data Retention	Duration Data is Retained at 85°C	10 years (min)
Temperature Range	Operating Temperature Range	0°C to 70°C
Storage Temperature	Temperature Range for Storage	-65°C to 150°C
Pin Configuration	Pin Layout	28-Pin PDIP
Programming Algorithm	Method Used for Programming the Device	Intel Hex Format

Instructions for Using AT29C256-20PC

1. Power Supply:

   • Connect the Vcc pin to a supply voltage between 4.5 V and 5.5 V.
   • Connect the Vss pin to ground.

2. Programming:

   • To program the device, apply a programming voltage (Vpp) of 12.5 V to the Vpp pin.
   • Use a standard Intel Hex file format for programming data.
   • Ensure that the programming current does not exceed 30 mA.

3. Erasing:

   • The entire chip can be erased by applying a high voltage to the Vpp pin and setting all address lines to high.
   • The erase cycle typically takes about 1 second.

4. Reading:

   • Apply the desired address to the address lines (A0-A14).
   • The data will be available on the data lines (D0-D7) after the access time (200 ns).

5. Standby Mode:

   • To enter standby mode, ensure that no active operations are being performed and that the Vcc is within the specified range.
   • The device will consume less than 1 μA in standby mode.

6. Handling Precautions:

   • Handle the device with care to avoid static damage.
   • Store the device in a temperature-controlled environment between -65°C and 150°C.

7. Temperature Considerations:

   • The device operates optimally between 0°C and 70°C.
   • Data retention is guaranteed for at least 10 years at 85°C.

8. Pin Configuration:

   • Refer to the pinout diagram provided in the datasheet for correct pin connections.

For detailed specifications and additional information, refer to the official AT29C256-20PC datasheet.

(For reference only)