Texas Instruments TMP103EYFFT

Overview

TMP103EYFFT from Texas Instruments is a low-power, digital temperature sensor in a 4-ball DSBGA (WCSP) package, featuring I²C/SMBus-compatible two-wire interface, ±1°C typical accuracy over –10°C to 100°C, 1°C resolution, and 3-μA active quiescent current at 0.25 Hz conversion rate - deployed for thermal monitoring in SSDs, notebooks, and telecom equipment.

For engineers reviewing the TMP103EYFFT datasheet, TMP103EYFFT pinout, TMP103EYFFT application, or TMP103EYFFT equivalent, key selection criteria include its MDA-enabled multi-device bus architecture, 1.4 V–3.6 V supply range, shutdown current of ≤1 μA, and zone-specific slave address (1110100b) enabling up to eight sensors on one bus without address conflict.

Technical Context

The TMP103EYFFT implements a diode-based temperature sensing element with sigma-delta A/D conversion and integrated oscillator, delivering digitized output via a slave-only two-wire interface supporting both standard (≤400 kHz) and high-speed (≤3.4 MHz) modes. Its internal register map includes configuration, temperature, THIGH/TLOW limit, and pointer registers.

It supports three functional modes: shutdown (≤1 μA), one-shot (26 ms conversion, auto-return), and continuous conversion (0.25/1/4/8 Hz selectable via CR1/CR0 bits), with MDA commands allowing simultaneous read/write across multiple TMP103 devices using global addressing - eliminating per-device polling overhead.

Key Specifications

Pinout & Package

Package: 4-ball DSBGA (YFF), 0.76 mm × 0.76 mm, 0.35 mm height - ultra-compact footprint ideal for space-constrained mobile and storage applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital temperature sensor applications.

Compared with TMP103EYFFT, TMP102DBVR trades MDA capability and ultra-low IQ for marginally better accuracy in a larger package, while LM75BIMM/NOPB offers industry-standard pinout at significantly higher power and reduced feature set - making TMP103EYFFT optimal for compact, multi-zone, low-power thermal architectures.

Availability

TMP103EYFFT is available at Aetrix Electronics and suitable for SSD thermal management, notebook system monitoring, and telecom baseband unit applications requiring stable component supply and long-term production continuity.

Supply support for TMP103EYFFT 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in precision sensing and low-power design.

The TMP103 product line was engineered specifically for ultra-compact, multi-zone thermal monitoring in space- and power-constrained electronics - targeting SSDs, mobile computing, and telecom infrastructure.

FAQ

What is the I²C slave address of the TMP103EYFFT?

The TMP103EYFFT uses a fixed 7-bit I²C slave address of 1110100b (0x74 in hexadecimal), corresponding to its "E" variant designation per Table 2 of the SBOS545D datasheet. This address is hardwired and non-configurable, enabling deterministic bus arbitration when multiple TMP103 variants (A–H) share the same two-wire bus. The TMP103EYFFT responds only to this address during standard read/write operations.

Does the TMP103EYFFT support multiple devices on the same I²C bus?

Yes, the TMP103EYFFT supports multi-device operation via Multiple Device Access (MDA) commands and its unique slave address (1110100b). Up to eight TMP103 devices - including TMP103EYFFT and other variants (A–H) - can coexist on one bus. MDA allows global read/write without individual addressing, reducing communication latency and firmware complexity in systems requiring thermal monitoring across multiple zones.

What is the conversion time and accuracy specification for the TMP103EYFFT?

The TMP103EYFFT has a typical conversion time of 26 ms and delivers ±1°C typical accuracy over the –10°C to 100°C range at 1.8 V supply. Accuracy degrades to ±3°C over the full –40°C to 125°C operating range. These values are production-tested and specified in Section 6.5 of the SBOS545D datasheet, confirming its suitability for thermal management in consumer and industrial edge devices where rapid, repeatable readings are required.

How does the TMP103EYFFT enter and exit shutdown mode?

The TMP103EYFFT enters shutdown mode when bits M1 and M0 in its Configuration Register are set to 00 - reducing current consumption to ≤1 μA. It exits shutdown automatically upon receiving a valid I²C start condition and slave address, then performs a single conversion before returning to shutdown unless reconfigured. This behavior is defined in Section 7.5.3 of the SBOS545D datasheet and enables predictable low-power operation in intermittent-sensing applications.

Is a bypass capacitor required for stable operation of the TMP103EYFFT?

Yes, Texas Instruments recommends a 0.01-μF ceramic bypass capacitor between V+ and GND, placed as close as possible to the TMP103EYFFT's package balls. This capacitor stabilizes the internal regulator and suppresses supply noise that could affect temperature measurement integrity - especially critical during I²C communication bursts. The requirement is explicitly stated in Figure 11 and Section 7.1 of the SBOS545D datasheet.