Microchip Technology 11LC160-I/P

Overview

11LC160-I/P from Microchip Technology Inc. is a 16 Kbit (2,048 × 8) serial EEPROM with UNI/O® single I/O bus interface, operating from 2.5V to 5.5V across -40°C to +85°C industrial temperature range. It features 16-byte page-write buffer, Schmitt-trigger SCIO input, output slope control, and built-in write protection including power-on/off circuitry and STATUS register control. It is used in space-constrained embedded systems for parameter storage, calibration data retention, and configuration backup.

For engineers reviewing the 11LC160-I/P datasheet, 11LC160-I/P pinout, 11LC160-I/P application, or 11LC160-I/P equivalent, this page delivers verified electrical specs, package mapping to 8-lead PDIP, UNI/O timing constraints, endurance/reliability metrics, and real-world substitution guidance - all grounded in DS22067J revision J.

Technical Context

The 11LC160-I/P implements Manchester-encoded UNI/O® protocol over a single bidirectional SCIO line, eliminating need for separate clock or chip-select signals. Its internal architecture includes a current-limited slope-controlled driver, re-synchronization logic tolerant to ±0.5% frequency drift per byte and ±0.06 UI edge jitter, and an 8-bit instruction register supporting READ, WRITE, WREN, RDSR, and block erase commands.

It uses on-chip high-voltage generation for EEPROM programming, supports dynamic STATUS register polling during writes via MAK-repeated reads, and enforces physical page boundaries (16-byte alignment) for write operations - crossing boundaries causes address wraparound rather than automatic page advancement.

Key Specifications

Pinout & Package

11LC160-I/P is packaged in 8-lead PDIP (P package), with pin 1 designated as VSS (ground), pin 2 as NC (no connect), pin 3 as NC, pin 4 as SCIO (serial clock/data I/O), pin 5 as NC, pin 6 as NC, pin 7 as NC, and pin 8 as VCC (supply voltage). All NC pins are internally unconnected and must be left floating or tied to ground per layout best practices.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Compared with 11AA160-I/P, the 11LC160-I/P trades 1.8V operation for enhanced 5.5V tolerance and automotive-grade (-40°C to +125°C) variants; compared with 25LC160-I/P, it sacrifices speed and ecosystem compatibility for single-pin footprint and noise-immune Manchester encoding.

Availability

11LC160-I/P is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for 11LC160-I/P includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and nonvolatile memory solutions for embedded control applications.

The 11LC160-I/P belongs to Microchip's UNI/O® Serial EEPROM family, designed specifically to reduce pin count and routing complexity in resource-constrained embedded systems while maintaining industrial reliability and ease of integration.

FAQ

What is the UNI/O® interface used by the 11LC160-I/P?

The 11LC160-I/P uses Microchip's patented UNI/O® bus - a single-wire, Manchester-encoded serial interface that combines clock and data on the SCIO pin. Unlike I²C or SPI, it requires no separate clock or chip-select lines, reducing GPIO usage and PCB routing complexity. The 11LC160-I/P implements full UNI/O® protocol compliance per DS22067J, including start header synchronization, MAK/NoMAK handshaking, and re-synchronization logic for jitter and drift tolerance.

Does the 11LC160-I/P support write protection, and how is it configured?

Yes, the 11LC160-I/P supports hardware block write protection via two nonvolatile BP0/BP1 bits in its STATUS register. These bits can be programmed using the WRSR command to protect 0%, 25%, 50%, or 100% of the memory array. Protection is enforced at the hardware level - attempts to write to locked blocks are ignored. The 11LC160-I/P also includes built-in power-on/off write protection circuitry that disables writes during brown-out conditions, preventing corruption during supply ramp-up/down.

What is the maximum write speed and page size of the 11LC160-I/P?

The 11LC160-I/P supports a maximum bit rate of 100 kbps (equivalent to 100 kHz), resulting in a typical write cycle time (TWC) of 5 ms for byte or page writes. Its page size is fixed at 16 bytes, and the device includes a 16-byte page-write buffer. To use page writes, up to 16 sequential bytes must be sent within one command - crossing physical page boundaries (e.g., writing byte 15 then byte 16 of page 0) causes wraparound to the start of the same page, not advancement to the next page.

Can the 11LC160-I/P operate down to 1.8V?

No, the 11LC160-I/P is specified for VCC = 2.5V to 5.5V only. Operation below 2.5V is not guaranteed and may result in unreliable read/write behavior or failure to enter standby mode. For 1.8V-compatible operation, Microchip offers the pin-compatible 11AA160-I/P variant, which shares identical density, page size, UNI/O® protocol, and package options but extends VCC down to 1.8V. Both parts use the same device address (0xA0) and instruction set.

How does the 11LC160-I/P handle power loss during a write operation?

The 11LC160-I/P incorporates built-in power-loss write protection circuitry that monitors VCC and automatically inhibits write operations during brown-out or power-down events. If VCC drops below the functional threshold during a write cycle, the internal high-voltage generator is disabled and the write is aborted safely - no partial or corrupted data is committed to the EEPROM array. This ensures data integrity without requiring external supervision circuitry, and is validated across the full -40°C to +85°C industrial temperature range.