Texas Instruments TCA9416DTMR

Overview

TCA9416DTMR from Texas Instruments is a 2-bit bidirectional I²C/SMBus voltage-level translator with rise/fall time accelerators, operating from 1.08 V to 3.6 V on both A- and B-ports, featuring integrated 10-kΩ pull-up resistors, VCC isolation, and OE-controlled high-impedance mode - used in wearables and low-voltage server interconnects.

For engineers reviewing the TCA9416DTMR datasheet, TCA9416DTMR pinout, TCA9416DTMR application, or TCA9416DTMR equivalent, key selection criteria include bidirectional translation without direction pin, UVLO thresholds (0.65–1.0 V), propagation delays as low as 2 ns at 3.6 V, I_off ≤ 2.5 µA, and compatibility with I²C Fast-mode Plus (1 MHz).

Technical Context

The TCA9416DTMR employs an N-channel pass-gate architecture with auto-direction sensing-no external direction control required. Its gate bias is set to min(VCCA, VCCB), enabling seamless level translation between mismatched rails (e.g., 1.2 V ↔ 3.3 V).

Rise-time accelerator (RTA) and fall-time accelerator (FTA) circuits actively detect edge transitions: RTA reduces rising-edge slew time by temporarily lowering output impedance to ~150 Ω; FTA similarly enhances falling-edge drive for capacitive loads > 50 pF. Both accelerators disable when OE = low, but internal 10-kΩ pull-ups remain active if VCC exceeds UVLO.

Key Specifications

Pinout & Package

Package: X2SON-8 (1.35 mm × 0.80 mm), moisture-sensitive level 1, lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar I²C voltage translation applications.

Compared with PCA9306DCUR and TXS0102DQMR, the TCA9416DTMR uniquely integrates edge accelerators, UVLO-gated pull-ups, and guaranteed 1-MHz operation in a space-constrained X2SON-8 package - making it optimal for next-generation wearables and high-density server management subsystems where speed, leakage, and footprint are co-constrained.

Availability

TCA9416DTMR is available at Aetrix Electronics and suitable for wearable electronics, server baseboard management, and industrial IoT edge nodes requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for TCA9416DTMR 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 company delivering analog and embedded processing solutions, with leadership in precision analog, power management, and interface ICs.

The TCA9416DTMR belongs to TI's "Switch" family of voltage translators, engineered specifically for low-voltage, high-speed bidirectional I²C/SMBus bridging in space- and power-constrained portable and infrastructure systems.

FAQ

What is the minimum operating voltage for TCA9416DTMR on both ports?

The TCA9416DTMR supports 1.08 V minimum on both VCCA and VCCB simultaneously. This allows direct interfacing with emerging ultra-low-voltage peripherals such as sub-1.2-V MEMS sensors and energy-harvesting SoCs. Operation below 1.08 V is not guaranteed and may result in undefined logic states or failure to meet timing specifications.

Does TCA9416DTMR require external pull-up resistors for standard I²C operation?

No, the TCA9416DTMR includes internal 10-kΩ pull-up resistors on all four I/O lines (SCL_A, SDA_A, SCL_B, SDA_B), referenced to their respective VCCA and VCCB supplies. External pull-ups are optional and only needed when faster rise times are required - for example, to reduce total RC time constant on buses with >100 pF load capacitance.

How does the OE pin function in TCA9416DTMR, and what happens when it is pulled low?

When OE is pulled low, the TCA9416DTMR places all SCL and SDA pins in high-impedance state, disabling signal translation and deactivating the rise/fall time accelerators. However, internal 10-kΩ pull-up resistors remain enabled if their respective VCC supply exceeds the UVLO threshold (~0.65 V), preserving bus termination integrity during standby.

Can TCA9416DTMR translate between 1.2-V and 3.3-V I²C buses while maintaining Fast-mode Plus (1 MHz) timing?

Yes, the TCA9416DTMR is fully specified for 1 MHz operation across its entire 1.08–3.6 V range. At VCCA = 1.2 V and VCCB = 3.3 V, propagation delays remain within 30 ns (t_PHL/t_PLH), and edge accelerators ensure clean signal integrity - verified in TI's typical application testing with 50-pF bus loads and 1-MHz square-wave stimuli.

What thermal performance can be expected from the X2SON-8 package of TCA9416DTMR in a standard 2-layer PCB layout?

In a standard JEDEC 2-layer board with 1-in² copper pour, the TCA9416DTMR in X2SON-8 exhibits R_θJA = 177.6°C/W. At full 1-MHz operation with 3.3-V supplies, typical power dissipation is <150 µW - resulting in negligible temperature rise (<0.1°C), eliminating need for thermal vias or heatsinking in most portable and server management applications.