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EEPROM, 4 Kbit, 512 x 8bit / 256 x 16bit, Serial 3-Wire, 250 kHz, SOIC, 8 Pins


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Technical Datasheet:
AT93C66B-SSHM-B   Datasheet
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Product Overview

The AT93C66B-SSHM-B is a MICROWIRE-compatible 4kB 3-wire serial Electrically Erasable Programmable Read-Only Memory (EEPROM) organized as 512 words of 16-bit each (when the ORG pin is connected to VCC) and 256 words of 8-bit each (when the ORG pin is tied to ground). The device is optimized for use in many industrial and commercial applications where low-power and low-voltage operations are essential. The AT93C66B is enabled through the chip select pin (CS) and accessed via a 3-wire serial interface consisting of data input (DI), data output (DO) and shift clock (SK). Upon receiving a read instruction at DI, the address is decoded and the data is clocked out serially on the DO pin. The write cycle is completely self-timed and no separate erase cycle is required before write. The write cycle is only enabled when the part is in the erase/write enable state. When CS is brought high following the initiation of a write cycle, the DO pin outputs the ready/busy status of the part.
  • Low-voltage operation
  • User-selectable internal organization
  • Sequential read operation
  • 2MHz Clock rate (5V)
  • Self-timed write cycle (5ms maximum)
  • High reliability
  • Endurance - 1000000 write cycles
  • Data retention - 100 years


Computers & Computer Peripherals, Industrial


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512 x 8bit / 256 x 16bit

Serial 3-Wire






Surface Mount



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Technical Documents (3)

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1,667 UK stock available for 4-6 business days delivery

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