Programmable read only memory card with improved buffer circuit

Details Programmable read only memory card with improved buffer circuit Programmable read only memory card with improved buffer circuit

1991-06-10

1993-04-13

Dixon, Joseph L.

Static information storage and retrieval

Read/write circuit

36518905, 235492, G11C 700

Patent

active

052028526

ABSTRACT:
The read only memory card into which data can be written includes a bidirectional buffer connected to a data bus and a read/write control circuit which controls the direction of data transmission by the buffer. The control circuit determines whether data is to be written into or read from the memory based on the voltage on a writing power supply line and an output enable signal line. The electrostatic discharge resistance of the read only memory card is thereby at least ten times higher than that of the conventional memory card in which the data bus is directly connected to external equipment.

REFERENCES:
patent: 4845351 (1989-07-01), Hara et al.
patent: 4910710 (1990-03-01), Kobatake
patent: 4916662 (1988-09-01), Mizuta
patent: 5016223 (1991-05-01), Kimura et al.
"IC Memory Card Guideline", pp. 1-33 (with translation of legends of figure on p. 10).
"Motorola High-Speed CMOS Integrated Circuits"; Series A, Second Printing, 1983, p. 5-233.

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