11AA020T-I/TT Integrated Circuits (ICs)

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1. Describe

Microchip Technology Inc. 11AA020T-I/TT devices are a 1 Kbit to 16 Kbit family of serial electrically erasable PROMs. These devices are organized in x8-bit memory blocks and support Patented** single I/O UNI/O® serial bus. Using Manchester encoding techniques, clock and data are combined into a single serial bit stream (SCIO), where the clock signal is extracted by the receiver to correctly decode the timing and value of each bit. The low-voltage design allows operation down to 1.8V, with standby and operating currents of only 1 uA and 1 mA, respectively. The 11AA020T-I/TT family is available in standard packages including 8-lead PDIP and SOIC, and advanced packages including 3-lead SOT-23, 3-lead TO-92, 4-lead chip scale, 8-lead TDFN and 8- pin pin MSOP.

2. Feature

    1. Single I/O, UNI/O® serial interface bus

    2. Low power CMOS technology:

        - 1 mA active current, typical

        - 1 µA standby current (max) (I-temp)

    3. 128 x 8 to 2,048 x 8-bit organization

    4. Schmitt trigger input for noise suppression

    5. Output slope control to eliminate ground bounce

    6. Up to 100 kbps. Bit rate - 100 kHz equivalent Clock frequency

    7. Self-timed write cycles (including auto-erase)

    8. Up to 16-byte page write buffer

    9. Added control status registers:

        - Write enable latch bit

        - write bit

  10. Block write protection:

        - Protect none, 1/4, 1/2 or all arrays

  11. Built-in write protection:

        - Power on/off data protection circuit

        - Write enable latch

  12. High reliability:

        - Endurance: 1,000,000 erase/write cycles

        - Data retention: > 200 years

        - ESD protection: > 4,000V

  13. 3-Pin SOT-23 and TO-92 Packages

  14. 4-pin chip scale package

  15. 8-Pin PDIP, SOIC, MSOP, TDFN Packages

  16. Lead-free and RoHS compliant

  17. Available temperature range:

        - Industrial (I): -40°C to +85°C

        - Automotive (E): -40°C to +125°C

3. Pin configuration

4. Pin Description

5. Function Description

The 11AA020T-I/TT series of serial EEPROMs support the UNI/O® protocol. They can match the UNI/O protocol to microcontrollers, including Microchip's PIC® microcontrollers, ASICs, or any other product with properly configurable discrete I/O lines. The 11AA020T-I/TT device contains an 8-bit instruction register. These devices are accessed through SCIO pins. All commands, addresses and data are transmitted MSb first and LSb last. Data is embedded into the I/O stream via Manchester encoding. The bus is clocked by the control master that accesses the control bus and initiates all operations, while the 11AA020T-I/TT operates as a slave. master-slave can Acts as a transmitter or receiver, but the master device determines which mode is active.