Battery backup bus scheme for an ECL BiCMOS SRAM
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United States of America Patent
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-
Jan 8, 1991
Grant Date -
N/A
app pub date -
Feb 16, 1988
filing date -
Feb 16, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A static random access memory is disclosed which has a first power supply terminal for receiving a power supply voltage for powering the periphery of the device and the array, and which has a second power supply terminal for receiving a power supply voltage for powering the array only. A diode may be connected between the two terminals to effect the biasing of the array from the first power supply terminal but not from the second power supply terminal. The memory may be incorporated into a system which has a power fail detector for controlling a switch, so that the battery is connected to the second power supply terminal when the main power supply has failed, but so that the main power supply is connected thereto when operable.
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