Microchip Technology 24AA16HT-I/MNY

Overview

24AA16HT-I/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, 1 μA standby current, and hardware write-protect for the upper half-array (400h–7FFh). It is used in industrial sensor calibration storage and embedded system configuration retention.

For engineers reviewing the 24AA16HT-I/MNY datasheet, 24AA16HT-I/MNY pinout, 24AA16HT-I/MNY application, or 24AA16HT-I/MNY equivalent, key selection criteria include low-voltage operation down to 1.7V, I²C bus compatibility at 400 kHz, 16-byte page write buffer, half-array hardware write-protection, and industrial temperature range support (–40°C to +85°C).

Technical Context

The 24AA16HT-I/MNY implements a two-wire I²C slave interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal architecture includes an 8-bit address pointer, 16-byte page latches, and a high-voltage generator for EEPROM programming.

It supports byte and page write operations with self-timed erase/write cycles (max 5 ms), acknowledges only after successful address/data reception, and suspends ACK during internal write cycles-enabling reliable acknowledge polling. The WP pin provides hardware-level protection for addresses 400h–7FFh when tied to VCC.

Key Specifications

Pinout & Package

24AA16HT-I/MNY is housed in an 8-lead TDFN (Thin Dual Flat No-lead) package with exposed pad, measuring 2 mm × 3 mm × 0.75 mm (MSL3, reflow compatible). Pin 1 is marked by chamfered corner; exposed pad may be connected to VSS or left floating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA16HT-I/MNY, the 24LC16BHT-I/MNY trades low-voltage capability for established qualification history, while the 24FC16H-I/MNY delivers higher throughput at the cost of stricter AC timing validation - making each optimal for distinct voltage, speed, and qualification constraints.

Availability

24AA16HT-I/MNY is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, and automotive body control module applications requiring stable component supply, long-term data retention, and industrial temperature resilience.

Supply support for 24AA16HT-I/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 microcontrollers, analog devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24AA16HT-I/MNY belongs to Microchip's 24XX16H family of I²C serial EEPROMs, designed specifically for low-power, space-constrained embedded systems requiring robust nonvolatile storage with hardware write protection and extended temperature operation.

FAQ

What is the maximum I²C clock frequency supported by the 24AA16HT-I/MNY?

The 24AA16HT-I/MNY supports up to 400 kHz when VCC is 2.5V or higher. At supply voltages between 1.7V and 2.5V, the maximum clock frequency is reduced to 100 kHz to ensure reliable timing margin. This dual-speed capability allows seamless integration across both standard and ultra-low-power I²C implementations without redesign.

How does the hardware write-protect feature work on the 24AA16HT-I/MNY?

When the WP pin of the 24AA16HT-I/MNY is tied to VCC, write operations to memory addresses 400h–7FFh (upper half-array) are disabled; reads remain fully functional. When WP is tied to VSS or left floating, full memory access is enabled. This provides deterministic, pin-level protection independent of firmware state.

Is the 24AA16HT-I/MNY compatible with standard I²C protocol and addressing?

Yes, the 24AA16HT-I/MNY uses the standard I²C 7-bit slave address format with control code '1010', three block-select bits (B2–B0), and R/W bit - resulting in a full 8-bit control byte. It fully complies with I²C specification timing, ACK/NACK behavior, and Start/Stop condition detection, including acknowledge polling during write cycles.

What package type is used for the 24AA16HT-I/MNY and what are its key mechanical features?

The 24AA16HT-I/MNY uses an 8-lead TDFN (Thin Dual Flat No-lead) package designated MNY, measuring 2.0 mm × 3.0 mm × 0.75 mm with an exposed thermal pad. It features gull-wing–free construction, JEDEC-compliant footprint, and MSL3 moisture sensitivity level - optimized for high-density PCB layouts and automated reflow assembly.

Does the 24AA16HT-I/MNY require external pull-up resistors on SDA and SCL lines?

Yes, the 24AA16HT-I/MNY has open-drain SDA and input-only SCL pins, requiring external pull-up resistors to VCC. For 400 kHz operation, a 2 kΩ resistor is recommended; for 100 kHz, 10 kΩ is typical. Pull-up value must be selected based on bus capacitance and rise-time requirements per I²C specification.