Standby Current ISB — 0.6 1.5 µA VPUP = 1.8V(3); SI/O = VPUP — 0.7 2.5 µA VPUP = 3.6V Input Low Level(3)(4)VIL –0.6 — 0.5 V AT21CS01/AT21CS11 Electrical Characteristics © 2019 Microchip Technology Inc. Datasheet DS20005857B-page 8....