Microchip Technology AT24C16A-10TU-1.8

Overview

AT24C16A-10TU-1.8 from Microchip Technology is a 16 Kbit (2048 × 8) two-wire serial EEPROM optimized for low-voltage embedded systems, supporting 1.8V to 5.5V operation, 100 kHz I²C bus speed at 1.8V, 128-page × 16-byte organization, and hardware write protection via WP pin - used in industrial sensor calibration storage and power-management configuration memory.

For engineers reviewing the AT24C16A-10TU-1.8 datasheet, AT24C16A-10TU-1.8 pinout, AT24C16A-10TU-1.8 application, or AT24C16A-10TU-1.8 equivalent, key selection factors include 1.8V minimum supply compatibility, 100-year data retention, 1 million write cycles, TSSOP-8 packaging, and I²C address flexibility with A0–A2 as NC pins.

Technical Context

The AT24C16A-10TU-1.8 implements a standard two-wire (I²C-compatible) serial interface with open-drain SDA and Schmitt-triggered SCL inputs for noise immunity. It uses an 11-bit internal word address counter for random/sequential reads and supports both byte and 16-byte page writes with automatic address wrap within pages.

Unlike smaller family members, the AT24C16A does not use A0–A2 for device addressing - all three pins are No Connect - limiting bus topology to one device per I²C segment. Write protection is implemented exclusively via the WP pin, which disables all write operations when pulled high.

Key Specifications

Pinout & Package

AT24C16A-10TU-1.8 is packaged in an 8-lead Thin Shrink Small Outline Package (TSSOP), 4.4 mm body width, RoHS-compliant and green-qualified ("U" suffix), with 0.65 mm lead pitch and exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C16B-SSHM-T, AT24C16A-10TU-1.8 offers guaranteed 100 kHz operation at 1.8V but lacks enhanced ESD; versus M95128-DFMN6TP, it retains I²C compatibility and lower pin count but trades off speed and density for protocol simplicity and voltage headroom.

Availability

AT24C16A-10TU-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, smart energy meter configuration, and embedded power management applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for AT24C16A-10TU-1.8 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 is a leading provider of microcontrollers, analog components, and memory solutions, delivering high-reliability silicon for industrial, automotive, and communications markets.

The AT24CxxA family was designed specifically for cost-sensitive, low-power embedded systems requiring robust serial EEPROM with flexible voltage operation and proven field reliability - with AT24C16A-10TU-1.8 targeting 1.8V I²C subsystems in space-constrained TSSOP layouts.

FAQ

What is the maximum I²C clock frequency supported by AT24C16A-10TU-1.8 at 1.8V?

The AT24C16A-10TU-1.8 supports a maximum I²C clock frequency of 100 kHz when operated at 1.8V, as specified in Table 5 of its datasheet. This is distinct from its 400 kHz capability at 2.7V and above. The 100 kHz limit ensures timing margins for setup/hold and rise/fall times under low-voltage conditions, making AT24C16A-10TU-1.8 suitable for battery-powered or ultra-low-voltage microcontroller interfaces where signal integrity is constrained.

Are the A0, A1, and A2 pins functional on AT24C16A-10TU-1.8?

No - on AT24C16A-10TU-1.8, the A0, A1, and A2 pins are designated as No Connect (NC) and serve no device-addressing function. Unlike smaller variants (e.g., AT24C01A or AT24C02), the AT24C16A uses all three bits for memory page addressing rather than hardware device selection. Therefore, AT24C16A-10TU-1.8 occupies the full I²C bus address range and cannot share the bus with other AT24C16A devices without external multiplexing.

What is the purpose of the WP pin on AT24C16A-10TU-1.8, and how should it be connected?

The WP (Write Protect) pin on AT24C16A-10TU-1.8 provides hardware-level write inhibition: when pulled high to VCC, it disables all write operations (byte, page, and erase), preserving stored data during power-up transients or software faults. For normal operation, WP must be tied to GND. Leaving WP floating is not recommended due to potential noise-induced false protection activation. This feature makes AT24C16A-10TU-1.8 ideal for storing immutable calibration data or security keys.

Does AT24C16A-10TU-1.8 support partial page writes?

Yes, AT24C16A-10TU-1.8 supports partial page writes within its 16-byte pages. After initiating a page write sequence, the internal address counter increments automatically with each byte received, wrapping within the current page boundary. Up to 16 bytes may be written per transaction, but fewer bytes (e.g., 3 or 7) are permitted - enabling efficient updates of scattered configuration fields without overwriting adjacent data. This behavior is explicitly confirmed in the "Page Write" section of the AT24C16A-10TU-1.8 datasheet.

What is the operating temperature range for AT24C16A-10TU-1.8?

AT24C16A-10TU-1.8 is rated for industrial temperature operation from –40°C to +85°C, as indicated by its ordering code suffix and confirmed in the Absolute Maximum Ratings table. This range applies across its full 1.8V–5.5V supply range and supports deployment in demanding environments such as factory automation controllers, outdoor metering, and automotive cabin modules - without derating of endurance or retention specifications.