| 摘要 |
An octal transparent latch or D-type register (or flip-flop) integrated circuit device may be packaged in an industry standard logic pin-out and configuration but having nonvolatile properties such as automatically recording the output state in nonvolatile form and restoring it on power up. The nonvolatile memory elements are ideally ferroelectric capacitors, using well known ferroelectric materials such as PZT, SBT, or BST or other ferroelectric materials. EEPROM, Flash, SNOS, or other writeable nonvolatile technologies can also be used. In a particular embodiment disclosed herein, the nonvolatile elements of the integrated circuit device are written only when the latched state changes to reduce write endurance changes thereto and data changes on either the input or output data lines that are not latched have no effect.
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