27C512 DATASHEET PDF

Logic Diagram. Signal Names. DIP Connections. LCC Connections Figure 5. TSOP Connections.

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Nevertheless to achieve compatibility with all pro-. M27C tion, a 4. The bulk capacitor should be located near the power supply connection point. The purpose of the bulk capacitor is to overcome the voltage drop caused by the inductive effects of PCB traces. Figure 6. Data is introduced by selectively program- ming '0's into the desired bit locations.

Although only '0's will be programmed, both '1's and '0's can be present in the data word. The data to be programmed is applied to 8 bits in parallel to the data output pins. The levels required for the address and data in- puts are TTL. V CC is specified to be 6. This can be achieved with STMicroelectronics M27C due to several design innovations described in the M27C datasheet to improve programming effi- ciency and to provide adequate margin for reliabil- ity.

Program Inhibit Programming of multiple M27Cs in parallel with different data is also easily accomplished. A high level E input inhibits the other M27Cs from being pro- grammed. Program Verify A verify read should be performed on the pro- grammed bits to determine that they were correct- ly programmed. The verify is accomplished with G at V IL.

This mode is intended for use by programming equipment to automatically match the device to be programmed with its corresponding programming algorithm. To activate the ES mode, the programming equipment must force Home - IC Supply - Link.

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