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Direct sunlight any intense light can cause temporary functional fail- ure due to generation of photo current. All similar inputs of the MME may be par- alleled.

IC Datasheet: EPROM – 1 : Free Download, Borrow, and Streaming : Internet Archive

Therefore, between 10 and 28 address pins are present. The eprm from lamp to unit should be maintained at 1 inch. All input voltage levels, including the program pulse on chip-enable are TTL compatible.

Reprogramming requires up to 20 minutes of high-intensity UV light exposure. Erasable Programmable Read-Only Memory.

2716 – 2716 16K EPROM Datasheet

Used to store setup information, e. Common sizes today are 1K to M locations. In- complete erasure will cause symptoms that can be misleading.

The MME to be erased should be placed 1 inch away from the lamp and no filters should be used. A new pattern can then be written into the device by following the programming procedure. Factory programmed, cannot be changed.


Chip Deselect to Output Float. DRAMs Pentiums have a bit wide data bus. Memory Chips ROMs cont: Memory Chips Each memory device has at least one control pin. Multiple pulses are not needed but will not cause device damage. Capacitance Is guaranteed by periodic testing.

The data pins are typically eproj in read-write memories. Except for “Operating Temperature Range” they are not meant to imply that the devices should be operated at these limits. The MME is packaged in a datzsheet dual-in-line package with transparent lid.

The number of data pins is related to the size of the memory location. Transition times S 20 ns unless noted otherwise. Instead, the address pins are multiplexed.

The UV content of sunlight epom cause a partial erasure of some bits in a relatively short period of time. For example, an 8-bit wide byte-wide memory device has 8 data pins. MMES may be programmed in parallel with the same data in this mode.

Writing is much slower than a normal RAM.

If more than one are present, then all must be 0 in order to perform a read or write. Field programmable but only once. This exposure discharges the floating gate to its initial state through induced photo current. When a lamp is changed, the distance is changed, or the lamp is aged, the system should be checked to make certain full erasure is occurring.


Table II shows the 3 programming modes. Catalog listing of 1K X 8 indicate a byte addressable 8K memory.

This is done 8 bits a byte at a time.

Memory Types Two basic types: Any or all of the 8 bits associated with an address location may be programmed wFth a single program pulse applied to the chip enable pin. The table of “Electrical Characteristics” provides conditions for actual device operation.

Program Verify Mode The programming of the MME may be verified either 1 word at a time during the programming as shown in the timing diagram or by reading all of the words out at the end of the programming sequence. These are shown in Table I. All bits will be at a “1” level output high in this initial state and after any full erasure.

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