Am2708
DESCRIPTION
The Am2708 is an 8,192-bit erasable and programmable MOS read-only memory. It is organized as 1024 words by 8 bits per word. Erasing the data in the EROM is acplished by projecting ultraviolet light through a transparent window for a predetermined time period.
When the Chip Selectl Write Enable input is at the high logic level, the device is unselected and the data lines are in their high impedance state. The device is selected when CSIWE is at the low logic level. The contents of a particular memory location, specified by the 10 address lines, will be available on the data lines after the access time has elapsed. For programming, CSIWE is connected to +12V and is used in conjunction with the Program input. The Address and Data lines are TTL patible for all operating and programming modes.
BLOCK DIAGRAM
CONNECTION DIAGRAM
A4-A9
ROW SELECT
128 X 64 MEMORY ARRAY
PROGRAM
- -
- -
- -
- AO-A3 ------,
CS/WE ------~
DATA BUFFERS
ADDRESS 7 ADDRESS 6 ADDRESS 5 ADDRESS 4...
