HN27C256AG-15: Top Choice in United States (USA) Utsource Holding Company Limited

Description

Parameter	Description	Value	Unit
Device Type	CMOS 256K x 8-bit UV EPROM
Package Type	DIP-28, PLCC-28
Operating Voltage (Vcc)	Supply voltage range	4.5 to 5.5	V
Access Time	Time from address valid to data valid	150	ns
Data Retention	Duration data is retained without power	10	years
Endurance	Number of write/erase cycles	100,000	cycles
Organization	Memory organization	256K x 8	bits
Temperature Range	Operating temperature range	-40 to +85	°C
Storage Temperature	Temperature range for storage	-65 to +150	°C

Power Supply:
- Ensure the supply voltage (Vcc) is within the specified range of 4.5V to 5.5V.
- Connect ground (GND) to a stable earth potential.
Addressing:
- Provide the correct address lines (A0-A17) to access the desired memory location.
- Address lines should be stable before the access time requirement.
Data Output:
- The output data (D0-D7) will become valid after the specified access time once the address is stable.
Write Protection:
- This device is an EPROM and does not support in-circuit writing. Programming must be done using a UV erasable programmer.
Erase Operation:
- To erase the contents, expose the device to ultraviolet light through the quartz window for approximately 20 minutes.
Handling Precautions:
- Handle with care to avoid damage to pins and the UV-transparent window.
- Store in a protective container when not in use to prevent accidental exposure to UV light.
Environmental Conditions:
- Operate within the specified temperature range to ensure reliable performance.
- Store in environments where temperatures do not exceed the storage temperature limits.
Mounting:
- Ensure proper mounting on the PCB to avoid mechanical stress on the package.
- Follow standard reflow soldering profiles suitable for the package type used.

(For reference only)