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Features
- Low‑Voltage Operation:
- AT21CS01 is
self-powered via the 1.7V
to 3.6V pull‑up voltage on the SI/O line
- AT21CS11 is self-powered
via the 2.7V
to 4.5V pull‑up voltage on the SI/O
line
- Internally Organized as 128 x 8
(1 Kbit)
- Temperature Range:
- Industrial (I): -40°C to
+85°C
- Extended (E): -40°C to
+125°C
- Single-Wire Serial Interface with I2C Protocol Structure:
- Device communication is achieved
through a single I/O pin
- Standard Speed and High-Speed Mode Options:
- 15.4 kbps maximum bit rate in Standard
Speed mode (AT21CS01
only)
- 125 kbps maximum bit rate in High-Speed
mode (AT21CS01 and AT21CS11)
- 8‑Byte Page Write or Single Byte Writes Allowed
- Discovery Response Feature for Quick Detection of
Devices on the Bus
- ROM Zone Support:
- Device is segmented into four 256‑bit
zones, each of which can be permanently made
read‑only (ROM)
- 256‑Bit Security Register:
- Lower eight bytes contain a
factory-programmed, read-only, 64‑bit serial number
that is unique to all Microchip single‑wire
devices
- Next
eight bytes are reserved for future use and will
read FFh
- Upper 16 bytes are user‑programmable
and permanently lockable
- Self‑Timed Write Cycle: 5 ms Maximum
- Manufacturer Identification Register:
- Device responds with unique value for
Microchip as well as density and revision
information
- High Reliability:
- Endurance: 1,000,000 write cycles
- Data retention: 100 years
- IEC 61000-4-2 Level 4 ESD Compliant
(±8 kV Contact, ±15 kV Air Discharge)
- Green Package Options (RoHS Compliant)
- Die Sale Options: Wafer Form and Tape
and Reel
- AEC-Q100 Automotive
Qualified