11AA020-I/P

Overview

The Microchip Technology 11AA020-I/P is a 2 Kbit (256 x 8) serial EEPROM utilizing the UNI/O single-wire interface. It operates within a supply voltage range of 1.8 V to 5.5 V and supports a maximum clock frequency of 100 kHz. The device features Schmitt trigger inputs for noise suppression, output slope control, and block write protection. It offers high reliability with over 1,000,000 erase/write cycles and data retention exceeding 200 years. The component is housed in an 8-lead PDIP package and functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Supports the UNI/O single I/O serial bus protocol using Manchester encoding for combined clock and data transmission.
• Includes built-in power-on/off data protection circuitry and a write enable latch for secure memory operations.
• Features configurable block write protection allowing selection of none, one-quarter, one-half, or all array segments.
• Provides self-timed write cycles with auto-erase capabilities and a page-write buffer for efficient data handling.

Applications

• Interfacing with microcontrollers requiring low-pin-count non-volatile storage
• Industrial systems needing reliable data retention under varying environmental conditions
• Embedded applications utilizing discrete I/O lines for serial communication

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm the device address configuration aligns with system bus requirements. Ensure compatibility with the master controller's UNI/O implementation. Check for any specific RoHS compliance documentation if required by your manufacturing standards.

Selection Notes

Select this part when a single-wire interface is necessary to minimize pin count on the PCB. Choose this model for applications requiring operation down to 1.8 V. Consider the 2 Kbit capacity and 16-byte page buffer size for appropriate data management strategies. Ensure the host system can handle the Manchester encoding timing requirements.

Part Context

This component belongs to the 11AAXXX/11LCXXX family of serial EEPROMs from Microchip Technology. The 'AA' designation indicates support for low-voltage operation starting at 1.8 V, distinguishing it from the 'LC' series which requires a minimum of 2.5 V. The 'I' suffix denotes the industrial temperature rating, while 'P' specifies the through-hole DIP package.

Replacement Considerations

The 11LC020 serves as a functional substitute within the same family but requires a minimum supply voltage of 2.5 V instead of 1.8 V. Other members of the 11XX family share the same interface but differ in memory density and organization.