Microchip Technology 24AA16T-E/MNY

Overview

24AA16T-E/MNY from Microchip Technology Inc. is a 16-Kbit I²C-compatible serial EEPROM organized as eight 256 × 8-bit blocks, operating from 1.7V to 5.5V with 400 kHz max clock frequency (100 kHz below 2.5V), 1 μA standby current, and industrial/extended temperature support (–40°C to +125°C). It features hardware write-protection via the WP pin, 16-byte page write buffer, and Schmitt-trigger inputs for noise immunity - deployed in embedded system configuration storage and sensor calibration data retention.

For engineers reviewing the 24AA16T-E/MNY datasheet, 24AA16T-E/MNY pinout, 24AA16T-E/MNY application, or 24AA16T-E/MNY equivalent, key selection considerations include VCC range compatibility (1.7V min), extended-temperature operation up to +125°C, I²C timing compliance at 100/400 kHz, and MNY package-specific footprint and thermal characteristics.

Technical Context

The 24AA16T-E/MNY implements a two-wire I²C slave interface with fixed 7-bit address prefix '1010' and three block-select bits (B2–B0), supporting up to eight 256-word memory blocks. Its internal Address Pointer auto-increments during sequential reads and page writes, enabling efficient burst access within 16-byte boundaries.

Write protection is implemented via dedicated WP pin logic: tied to VSS enables full read/write; tied to VCC disables all write operations while preserving read functionality. The device uses on-chip HV generator and EEPROM array with self-timed erase/write cycles, eliminating external timing components.

Key Specifications

Pinout & Package

24AA16T-E/MNY is supplied in an 8-lead UDFN (Ultra-Thin Dual Flat No-Lead) package, 2 mm × 3 mm body, 0.5 mm pitch, with exposed pad (EP) electrically connected to VSS per Microchip drawing C04-103-UDFN. The package supports high-density PCB layouts and improved thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC16BT-E/MNY, the 24AA16T-E/MNY enables lower-voltage operation critical for portable equipment; versus 24FC16T-E/MNY, it trades peak speed for broader timing margin and simpler layout validation at 400 kHz.

Availability

24AA16T-E/MNY is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, medical infusion pump settings, and smart energy meter firmware parameters requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 24AA16T-E/MNY 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 leading provider of microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24AA16T-E/MNY belongs to Microchip's 24XX16 family of I²C serial EEPROMs, designed specifically for low-power, extended-temperature nonvolatile data storage in space-constrained embedded systems where reliability and voltage flexibility are critical.

FAQ

What is the maximum I²C clock frequency supported by the 24AA16T-E/MNY?

The 24AA16T-E/MNY supports up to 400 kHz when VCC is 2.5V or higher. At VCC between 1.7V and 2.49V, the maximum clock frequency is reduced to 100 kHz to ensure reliable timing margins. This dual-speed capability allows seamless integration across 1.8V, 3.3V, and 5V system domains without redesign.

Does the 24AA16T-E/MNY require external pull-up resistors on SDA and SCL lines?

Yes, the 24AA16T-E/MNY requires external pull-up resistors on both SDA and SCL because its I²C interface uses open-drain outputs. For 400 kHz operation, a 2 kΩ resistor is recommended; for 100 kHz, 10 kΩ is typical. The exact value depends on bus capacitance and rise-time requirements specified in the I²C standard.

How does the WP pin function on the 24AA16T-E/MNY?

The WP (Write-Protect) pin on the 24AA16T-E/MNY provides hardware-level write inhibition: when tied to VCC, all write operations (byte and page) are blocked while reads remain fully functional; when tied to VSS, full read/write access is enabled. This eliminates software-based protection vulnerabilities and prevents corruption during power transients.

What package type is used for the 24AA16T-E/MNY, and what are its key mechanical features?

The 24AA16T-E/MNY uses an 8-lead UDFN (Ultra-Thin Dual Flat No-Lead) package, designated MNY, measuring 2 mm × 3 mm with 0.5 mm pitch and an exposed thermal pad. Per Microchip drawing C04-103-UDFN, the pad is internally connected to VSS and must be soldered to the PCB ground plane for optimal thermal performance and EMI suppression.

Is the 24AA16T-E/MNY AEC-Q100 qualified, and for which automotive grades?

Yes, the 24AA16T-E/MNY is AEC-Q100 qualified for Grade 1 (–40°C to +125°C), matching its extended temperature rating. This qualification covers stress testing for reliability, including HTOL, TCT, and ESD, making it suitable for under-hood and cabin electronics where automotive-grade component certification is mandatory.