AT93C46D Datasheet, Microchip

* Low-Voltage Operation:
  – VCC = 1.8V to 5.5V
* User-Selectable Internally Organized as 128 x 8 (1K) or 64 x 16 (1K)
* Non-Selectable Internal.

...................................................................................................................................... 5 2.1. Chip Select (CS).............................................................................................