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Specifications
SKU: 210145
| Parameter | Description | Value |
|---|---|---|
| Part Number | AM27C256-120JC | |
| Type | CMOS UV Erasable PROM | |
| Organization | 32K x 8 bits | |
| Density | 256 Kbits | |
| VCC Operating Range | Supply Voltage | 4.5V to 5.5V |
| VPP Programming Voltage | Programming Voltage | 12.0V ± 0.5V |
| Access Time | Standard Access Time | 120 ns |
| Data Retention | Data Retention Time | 10 years (typical) |
| Programming Time | Typical Programming Time per Location | 1 ms (typical) |
| Erasure Time | UV Erase Time | 20 minutes (typical) |
| Package Type | Ceramic DIP (Dual Inline Package) | 28-pin |
| Operating Temperature | Industrial Temperature Range | -40°C to +85°C |
| Storage Temperature | Storage Temperature Range | -65°C to +150°C |
| Mounting Type | Through-Hole | |
| Polarity | Pin 1 Identification | Notched corner |
| RoHS Compliance | RoHS Compliant | Yes |
Instructions for Use
Power Supply:
- Ensure that the VCC is within the specified range (4.5V to 5.5V).
- The VPP pin should be connected to 12.0V ± 0.5V during programming.
Programming:
- Apply the programming voltage (VPP) to the appropriate pin.
- Use a standard EPROM programmer to write data to the device.
- Programming time is typically 1 ms per location.
Erasing:
- Expose the device to ultraviolet light for approximately 20 minutes to erase the contents.
- Ensure the device is properly shielded from light when not being erased to prevent accidental data loss.
Reading:
- Apply the standard operating voltage (VCC) and use standard read operations to access the data stored in the device.
Handling:
- Handle the device with care to avoid damage to the pins and ceramic package.
- Store the device in a dry, cool environment to ensure long-term reliability.
Mounting:
- Insert the device into the socket or PCB ensuring that Pin 1 is correctly aligned with the notched corner.
- Solder the device if necessary, following standard through-hole soldering procedures.
Testing:
- After programming and mounting, verify the data integrity by reading back the programmed data.
- Use a continuity tester or multimeter to check for proper connections and no shorts.
By following these guidelines, you can ensure reliable operation and long-term performance of the AM27C256-120JC UV erasable PROM.
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