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Texas Instruments TCA9416DDFR
- Part No.:
- TCA9416DDFR
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
TCA9416DDFR.pdf
- Description:
- IC TRANSLATOR BIDIR TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,169
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Product details
Overview
TCA9416DDFR 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 low-voltage mixed-rail I²C interconnects between 1.2-V/1.8-V microcontrollers and 3.3-V sensors or PMICs.
For engineers reviewing the TCA9416DDFR datasheet, TCA9416DDFR pinout, TCA9416DDFR application, or TCA9416DDFR equivalent, this page delivers verified electrical specs (e.g., tPLH ≤ 20 ns at 1.8 V, Ron ≤ 25 Ω, ICCA + ICCB ≤ 23 µA), package mapping (X2SON-8, 1.35 mm × 0.80 mm), functional mode behavior (OE-referenced to VCCA, no power sequencing required), and real-world interface constraints for wearables, servers, and personal electronics designs.
Technical Context
The TCA9416DDFR implements auto-direction-sensing translation using N-channel pass-gate topology with gate bias set to min(VCCA, VCCB); it requires no direction-control signal and supports Standard-mode (100 kHz), Fast-mode (400 kHz), and Fast-mode Plus (1 MHz) I²C timing. Its architecture includes independent rise-time accelerator (RTA) and fall-time accelerator (FTA) circuits per channel, each triggered by edge detection to temporarily reduce output impedance to ~150 Ω during transitions.
VCC isolation ensures SCL_A/SDA_A/SCL_B/SDA_B enter high-impedance state when either VCCA or VCCB = 0 V (excluding internal pull-ups), while OE input-referenced to VCCA but 3.6-V tolerant-enables system-level bus gating without external logic. Internal 10-kΩ pull-ups are supply-gated: enabled only when respective VCC exceeds UVLO rising threshold (0.65–0.9 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Range (A/B) | 1.08 V to 3.6 V - enables direct interfacing between 1.2-V, 1.8-V, 2.5-V, and 3.3-V I²C domains without level-shifting ICs or discrete solutions. |
| Propagation Delay (tPLH/tPHL) | ≤ 20 ns at 1.8 V - ensures timing compliance for Fast-mode Plus (1 MHz) I²C operation with minimal added latency. |
| On-Resistance (Ron) | ≤ 25 Ω at 1.65 V - maintains low VOL under 3 mA sink current, supporting robust noise margins in noisy embedded environments. |
| Supply Current (ICCA + ICCB) | ≤ 23 µA at 3.6 V - enables always-on I²C monitoring in battery-powered wearables with negligible quiescent drain. |
| UVLO Thresholds | Rising: 0.65–0.9 V; Falling: 0.6–0.85 V - prevents partial-enable states during power ramp-up/down, ensuring deterministic high-Z behavior. |
| ESD Rating (HBM) | ±2500 V on I/O pins - meets industrial-grade ESD robustness requirements without external protection diodes. |
| Enable/Disable Time | ten ≤ 350 ns, tdis ≤ 160 ns - allows rapid bus arbitration and dynamic power gating in multi-master systems. |
Pinout & Package
X2SON-8 package (1.35 mm × 0.80 mm, 0.35 mm pitch), wettable flank, lead-free, RoHS-compliant - optimized for space-constrained wearable and mobile PCB layouts with automated optical inspection (AOI) support.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL_A | I/O (A-port clock) | Bidirectional SCL line referenced to VCCA; passes signals to SCL_B via pass-gate when enabled; high-Z when OE = low or VCCA = 0 V. |
| VCCA | Power (A-port supply) | Supplies A-side logic and internal circuitry; sets VIH/VIL thresholds for OE; enables A-port pull-ups above UVLO. |
| SDA_A | I/O (A-port data) | Bidirectional SDA line referenced to VCCA; auto-senses direction; integrates RTA/FTA acceleration on transitions. |
| GND | Ground | Common reference for all signals and supplies; must be low-inductance connection to minimize ground bounce in high-speed I²C. |
| SDA_B | I/O (B-port data) | Bidirectional SDA line referenced to VCCB; electrically isolated from A-port except through controlled pass-gate; retains high-Z if VCCB = 0 V. |
| VCCB | Power (B-port supply) | Supplies B-side logic; enables B-port pull-ups independently; supports VCCB < VCCA or VCCB > VCCA configurations. |
| SCL_B | I/O (B-port clock) | Bidirectional SCL line referenced to VCCB; synchronized with SDA_B for I²C protocol integrity; accelerated edge rates preserve setup/hold timing. |
| OE | Input (output enable) | Active-high control referenced to VCCA; disables pass-gate and accelerators (but not pull-ups); 3.6-V tolerant for flexible GPIO interfacing. |
Key Features
| Feature | Design Value |
|---|---|
| No direction pin required | Auto-direction sensing eliminates external control logic and routing complexity in compact PCB layouts. |
| Rise/fall time accelerators | Reduces effective output impedance to ~150 Ω during edges, cutting rise/fall times by up to 50% vs passive pull-ups alone - critical for 1-MHz I²C. |
| VCC isolation | Guarantees high-Z outputs on both ports if either VCCA or VCCB collapses - prevents back-powering and latch-up in fault conditions. |
| Integrated 10-kΩ pull-ups | Eliminates four external resistors per device, reducing BOM count and board area; pull-ups remain active even when OE = low. |
| No power-supply sequencing | Either VCCA or VCCB may ramp first without damage or undefined behavior - simplifies power management in multi-rail systems. |
Applications
| Wearable Sensor Hub | Server Baseboard Management |
|---|---|
|
Use Scenario: Interfacing ultra-low-power 1.2-V MEMS motion sensors with a 3.3-V BMC controller over shared I²C bus. IC Role / Device Role / Timing Role: Bidirectional voltage translator enabling clock/data translation between mismatched rails while preserving I²C timing budgets. Use Value: Eliminates need for discrete MOSFET translators and external pull-ups, reducing component count by ≥6 parts and saving >1.5 mm² PCB area. |
Use Scenario: Connecting 1.8-V thermal monitors and 3.3-V EEPROMs to a 3.3-V IPMI controller in a 1U server chassis. IC Role / Device Role / Timing Role: Isolated I²C bridge with VCC fault containment - prevents bus lockup if one supply fails. Use Value: Enables hot-plug sensor replacement without powering down entire baseboard; OE pin allows firmware-controlled bus segmentation. |
| Mobile SoC Power Sequencing | Industrial IoT Edge Node |
|
Use Scenario: Level-shifting I²C signals between a 1.8-V application processor and 2.5-V PMIC during boot sequence with asymmetric power ramp rates. IC Role / Device Role / Timing Role: Voltage translator with independent UVLO per rail and OE-controlled disable - avoids spurious writes during power transition. Use Value: Prevents erroneous I²C transactions caused by partial VCC ramping; eliminates need for external POR monitoring circuitry. |
Use Scenario: Bridging 3.3-V environmental sensors and 1.8-V microcontroller in a battery-operated smart meter exposed to industrial ESD events. IC Role / Device Role / Timing Role: Robust I²C translator with ±2500-V HBM ESD rating and low ICCA+ICCB for extended battery life. Use Value: Meets IEC 61000-4-2 Level 4 immunity without external TVS diodes; 23-µA max supply current extends 10-year battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar I²C voltage translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TCA9617ADGKR | 2-channel, 1.65–5.5-V range, no internal pull-ups, higher Ron (≤40 Ω), supports 3.4-MHz Ultra-Fast-mode. | Requires external 4.7-kΩ pull-ups; better suited for high-speed industrial buses where 1-MHz is insufficient. | Select TCA9617ADGKR only if >1-MHz I²C bandwidth or wider voltage range (up to 5.5 V) is required; not drop-in due to missing pull-ups and different pinout. |
| PCA9306DCUR | 2-channel, 1.2–3.6-V range, no RTA/FTA accelerators, higher propagation delay (tPLH ≤ 40 ns), no VCC isolation. | Lacks edge acceleration and VCC fault containment - unsuitable for 1-MHz timing-critical or fail-safe systems. | Choose PCA9306DCUR only for cost-sensitive, non-critical 100/400-kHz I²C links where board space and ESD robustness are secondary concerns. |
Compared with TCA9416DDFR, TCA9617ADGKR offers higher speed but demands external components and lacks integrated protection features, while PCA9306DCUR provides basic translation at lower cost but sacrifices timing performance, ESD margin, and fault resilience - making TCA9416DDFR optimal for space-constrained, high-reliability 1-MHz I²C bridges.
Availability
TCA9416DDFR is available at Aetrix Electronics and suitable for wearable sensor hubs, server baseboard management, and mobile SoC power sequencing requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant X2SON packaging.
Supply support for TCA9416DDFR 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 since 1930.
The TCA9416DDFR belongs to TI's "Switch" family of voltage translators, designed specifically for low-voltage, bidirectional I²C/SMBus interoperability in space- and power-constrained portable and industrial systems.
FAQ
What is the maximum I²C clock frequency supported by the TCA9416DDFR?
The TCA9416DDFR supports Standard-mode (100 kHz), Fast-mode (400 kHz), and Fast-mode Plus (1 MHz) I²C operation. Its propagation delay (tPLH ≤ 20 ns at 1.8 V) and edge accelerators ensure reliable timing closure at 1 MHz, provided bus capacitance remains ≤ 400 pF and pull-up strength is sufficient. The TCA9416DDFR does not support Ultra-Fast-mode (3.4 MHz).
Can TCA9416DDFR translate between 1.2 V and 3.3 V I²C buses without external components?
Yes. The TCA9416DDFR operates from 1.08 V to 3.6 V on both ports and includes internal 10-kΩ pull-up resistors on all four I/O lines (SCL_A, SDA_A, SCL_B, SDA_B). When VCCA = 1.2 V and VCCB = 3.3 V, it translates bidirectionally without external resistors - though adding parallel external pull-ups may be needed for heavy capacitive loads (>300 pF) to meet rise-time requirements.
How does the OE pin function on the TCA9416DDFR, and what happens when it is pulled low?
The OE pin on the TCA9416DDFR is an active-high input referenced to VCCA. When OE is pulled low, all SCL_A, SDA_A, SCL_B, and SDA_B pins enter high-impedance state within ≤160 ns (tdis), disabling signal translation and deactivating rise/fall time accelerators. Crucially, internal 10-kΩ pull-up resistors remain enabled if their respective VCCA or VCCB exceeds UVLO, maintaining bus biasing during standby.
Does the TCA9416DDFR require power-supply sequencing, and what happens if VCCA ramps before VCCB?
No, the TCA9416DDFR requires no power-supply sequencing: either VCCA or VCCB may ramp first without damage or undefined behavior. If VCCA ramps before VCCB, the A-port I/Os remain high-Z until VCCB exceeds UVLO (0.65–0.9 V), preventing back-driving. This behavior is guaranteed by the VCC isolation feature and eliminates need for external power-ordering circuitry in multi-rail systems.
What thermal performance can be expected from the TCA9416DDFR in X2SON-8 package?
In its X2SON-8 package (1.35 mm × 0.80 mm), the TCA9416DDFR has a junction-to-ambient thermal resistance (RθJA) of 177.6°C/W. At maximum recommended operating temperature (125°C ambient) and worst-case ICCA + ICCB (23 µA), self-heating is negligible (<0.005°C), confirming suitability for thermally constrained wearable and mobile applications without heatsinking or airflow.
TCA9416DDFR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 2
- Voltage - VCCA:
- 1.08 V ~ 3.6 V
- Voltage - VCCB:
- 1.08 V ~ 3.6 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Open Drain
- Data Rate:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8 Thin, TSOT-23-8
TCA9416DDFR FAQ
1.How can I place an order for TCA9416DDFR through Aetrix?
Please submit a Request for Quotation (RFQ) for TCA9416DDFR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TCA9416DDFR reliable?
The price and inventory of TCA9416DDFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TCA9416DDFR is usually 5 days.
3.What payment methods are accepted for TCA9416DDFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TCA9416DDFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TCA9416DDFR?
TCA9416DDFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TCA9416DDFR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TCA9416DDFR?
For technical support, including TCA9416DDFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TCA9416DDFR requirements.
6.How does Aetrix verify that TCA9416DDFR is sourced from the original manufacturer or authorized distributors?
All TCA9416DDFR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TCA9416DDFR meets industry standards.
7.What is the process for return or replacement of TCA9416DDFR?
All TCA9416DDFR units undergo pre-shipment inspection (PSI). If there is an issue with TCA9416DDFR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TCA9416DDFR part is unused and in its original packaging.
Return procedure for TCA9416DDFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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