AT21CS01 datasheet(2/47 Pages) MICROCHIP

Part #	AT21CS01

Description	Single-Wire, I/O Powered 1-Kbit (128 x 8) Serial EEPROM with a Unique, Factory-Programmed 64-Bit Serial Number

PDF	47 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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2 / 47 page

Package Types (not to scale)

8-lead SOIC

(Top View)

GND

SI/O

GND

4-ball WLCSP

(Top View)

GND

SI/O

3-lead SOT23

(Top View)

SI/O

GND

2-pad XSFN

(Top View)

Description

The AT21CS01/11 is a 2-pin memory (SI/O signal and Ground) that harvests energy from the signal pin to

power the integrated circuit. It provides 1,024 bits of Serial Electrically Erasable and Programmable Read-

Only Memory (SEEPROM) organized as 128 words of eight bits each.

The device is optimized to add configuration and use information in unpowered attachments using a two-point

mechanical connection that brings only one signal (SI/O) and GND to the unpowered attachment. Some

unpowered attachment application examples include analog sensor calibration data storage, ink and toner

printer cartridge identification, and management of after

‑market consumables. The device’s software

addressing scheme allows up to eight devices to share a common single

‑wire bus. The device is available in

space

‑saving package options and operates with an external pull‑up voltage from 1.7V to 3.6V on the SI/O

line (AT21CS01) or from 2.7V to 4.5V on the SI/O line (AT21CS11).

AT21CS01/AT21CS11

Datasheet

DS20005857A-page 2

AT21CS01 Datasheet(PDF) 2 Page - Microchip Technology