The maximum operating temperature range for the TMS27C256-10JL is -40°C to 85°C.
The power-up and power-down sequences for the TMS27C256-10JL should be handled according to the recommended power-up and power-down sequences in the datasheet, which involves slowly ramping up the VCC supply voltage to the recommended operating voltage range.
The recommended storage temperature range for the TMS27C256-10JL is -65°C to 150°C.
To ensure data retention for the TMS27C256-10JL, the device should be powered up and down according to the recommended power-up and power-down sequences, and the device should not be exposed to extreme temperatures or voltage conditions.
The maximum clock frequency for the TMS27C256-10JL is 10 MHz.