Product
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AT21CS01
  • AT21CS01
  • AT21CS01
  • AT21CS01
  • AT21CS01
  • AT21CS01
  • AT21CS01

AT21CS01

In Production

The Microchip AT21CS01 is a 1 Kb Serial EEPROM utilizing the Single-Wire bus. Only two pins are needed to access the device: SI/O and GND. The SI/O signal is a combination data and power line, providing power to the device with a parasitic power scheme. The device is organized as one block of 128 x 8 and is optimized for use in consumer and industrial applications where reliable and dependable nonvolatile memory storage is essential. The EEPROM is available in a variety of space-saving packaging options. The AT21CS01 features a 256-bit Security register which includes a 64-bit serial number. The device also features manufacturer ID support in which the device responds with a unique value for density and revision information....

Microchip Technology AT21CS01 Product Info

16 April 2026 0

Parameters

Battery Backup

No

Density

1 Kbit

Endurance

1000000

Max. Clock Freq.

125 kbps

Operating Voltage Max (V)

3.6

Operating Voltage Min (V)

1.7

Page Size (Bytes)

8

Write Protect Scheme

Software Configurable

Write Protected

Yes

Data Retention

100

Features

  • 128 x 8 (1 Kbit)
  • I²C protocol structure
  • Self-Timed Erase and Write Cycles (5 ms max.)
  • Communication through a single I/O pin
  • Standard Speed (15.4 kbps) and High Speed (125 kbps) Modes
  • Read current 0.08 mA (Typ), 0.3 mA (Max)
  • Write current 0.2 mA (Typ), 0.5 mA (Max)
  • Standby current 0.7 uA (Typ), 2.5 uA (Max)
  • Four independent 256-bit zones
  • More than 1 million erase/write cycles
  • Data retention > 100 years
  • ESD protection > 8000V (HBM)
  • AEC-Q100 Grade 1 Qualified
  • Factory Programming Available
  • Available in 8-pin SOIC (150 mil), 3-pin SOT23, 2-pad XSFN, and 4-ball Thin CSP packages.

    • Description

    The Microchip AT21CS01 is a 1 Kb Serial EEPROM utilizing the Single-Wire bus. Only two pins are needed to access the device: SI/O and GND. The SI/O signal is a combination data and power line, providing power to the device with a parasitic power scheme. The device is organized as one block of 128 x 8 and is optimized for use in consumer and industrial applications where reliable and dependable nonvolatile memory storage is essential. The EEPROM is available in a variety of space-saving packaging options.

    The AT21CS01 features a 256-bit Security register which includes a 64-bit serial number. The device also features manufacturer ID support in which the device responds with a unique value for density and revision information.

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