11AA040-I/P

Overview

The Microchip Technology 11AA040-I/P is a 4 Kbit (512 x 8) serial EEPROM utilizing the UNI/O single I/O bus interface. It operates within a supply voltage range of 1.8 V to 5.5 V and supports an industrial temperature range from -40°C to +85°C. The device features a maximum bit rate of 100 kbps, a 16-byte page-write buffer, and block write protection capabilities. Electrical characteristics include a typical active current of 1 mA and a maximum standby current of 1 µA.

Feature Summary

• Supports the patented UNI/O single I/O serial bus protocol using Manchester encoding for combined clock and data transmission on the SCIO pin.
• Includes built-in hardware protections such as power-on/off data protection, a write enable latch, and configurable block write protection for array security.
• Features Schmitt trigger inputs for noise suppression and output slope control designed to eliminate ground bounce during signal transitions.

Applications

• Interfacing with microcontrollers or ASICs via discrete I/O lines configured for the UNI/O protocol
• Low-power embedded systems requiring minimal pin count for non-volatile data storage
• Industrial applications operating within standard commercial temperature ranges

Procurement Notes

Verify that the specific ordering suffix corresponds to the PDIP-8 package type and Industrial temperature grade. Confirm the device density matches the 4 Kbit specification. Ensure compatibility with the master controller's ability to generate the required UNI/O Manchester encoded signals and timing constraints.

Selection Notes

Select this component when a single-pin serial interface is preferred over multi-wire protocols like SPI or I2C. It is suitable for designs requiring low standby current and robust noise immunity through Schmitt triggers. Consider the 1.8 V minimum operating voltage if powering from lower voltage rails compared to the 2.5 V requirement of the LC series.

Part Context

This part belongs to the 11XX family of serial EEPROMs, which includes densities ranging from 1 Kbit to 16 Kbit. The 'AA' designation indicates support for 1.8 V operation, distinguishing it from the 'LC' series which requires a minimum of 2.5 V. The family shares common command sets and physical packaging options across different memory sizes.

Replacement Considerations

The 11LC040-I/P is a functional substitute with identical pinout and commands but requires a minimum supply voltage of 2.5 V instead of 1.8 V.