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Texas Instruments TXB0101DCKR
- Part No.:
- TXB0101DCKR
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
TXB0101DCKR.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,401
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Product details
Overview
TXB0101DCKR from Texas Instruments is a 1-bit bidirectional voltage translator with auto direction-sensing, supporting 1.2V–3.6V on A port and 1.65V–5.5V on B port (VCCA ≤ VCCB), ±15 kV HBM ESD protection on B port, VCC isolation, and 5 μA max ICC. It enables low-voltage interconnect between 1.8-V microcontrollers and 3.3-V peripherals in space-constrained mobile interfaces.
For engineers reviewing the TXB0101DCKR datasheet, TXB0101DCKR pinout, TXB0101DCKR application, or TXB0101DCKR equivalent, key selection criteria include bidirectional level-shifting without direction control, Ioff partial-power-down support, SC70-6 package footprint (2.00 mm × 1.25 mm), and guaranteed 100 Mbps operation at 3.3V/5V translation.
Technical Context
The TXB0101DCKR implements edge-accelerated buffered translation using dual one-shot circuits per I/O path-PMOS for fast low-to-high transitions and NMOS for high-to-low-achieving typical output impedances of 40 Ω (VCCO = 3.3–5 V), 50 Ω (1.8–3.3 V), and 70 Ω (1.2–1.8 V). Its architecture eliminates external direction-control logic.
VCC isolation ensures all outputs enter high-impedance when either VCCA or VCCB = GND; OE is referenced to VCCA and disables both ports simultaneously. The device supports push-pull CMOS only-not open-drain protocols like I²C-and requires external pull resistors >50 kΩ if used on terminated lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| A-port voltage range | 1.2 V to 3.6 V - supports direct interface with 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V logic domains |
| B-port voltage range | 1.65 V to 5.5 V - enables translation to 1.8V, 2.5V, 3.3V, and 5V systems with VCCA ≤ VCCB constraint |
| Max data rate | 100 Mbps - verified at VCCA = 3.3V ± 0.3V / VCCB = 3.3V or 5V, enabling high-speed serial bus bridging |
| B-port ESD rating | ±15 kV HBM - meets IEC 61000-4-2 Level 4 system-level ESD immunity requirements for handheld end equipment |
| Quiescent current | 5 μA maximum ICC - enables always-on level shifting in battery-powered devices without significant leakage penalty |
| Ioff support | Yes - prevents backflow current during partial power-down, protecting powered-down sections of mixed-voltage SoCs |
| Propagation delay | 0.8–4.7 ns - tpd(A→B) at VCCA=3.3V/VCCB=5V, ensuring sub-10 ns timing margins for 100 Mbps signaling |
Pinout & Package
TXB0101DCKR uses the SC70-6 (DCK) package: 2.00 mm × 1.25 mm body, 0.65 mm pitch, 6-pin surface-mount outline. Pin 1 = VCCA, Pin 2 = GND, Pin 3 = A (I/O, VCCA-referenced), Pin 4 = B (I/O, VCCB-referenced), Pin 5 = OE (input, VCCA-referenced), Pin 6 = VCCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCCA | A-port supply rail | Must be ≤ VCCB; powers A-side logic and OE input; range 1.2–3.6 V defines compatible source voltage domains |
| 2 - GND | Common reference | Single ground connection shared by both voltage domains; no separate analog/digital grounds required |
| 3 - A | Bidirectional I/O (A side) | Connects to 1.2–3.6 V logic; auto-senses direction; weak DC drive strength requires external termination >50 kΩ if used |
| 4 - B | Bidirectional I/O (B side) | Connects to 1.65–5.5 V logic; supports ±15 kV HBM ESD; same auto-direction behavior as A port |
| 5 - OE | Output enable input | Active-high, VCCA-referenced; drives both A and B ports into high-Z when low; pulldown resistor recommended at power-up |
| 6 - VCCB | B-port supply rail | Must be ≥ VCCA; powers B-side logic; higher voltage domain determines maximum supported data rate and noise margin |
Key Features
| Feature | Design Value |
|---|---|
| Auto direction-sensing | Eliminates need for external direction-control signals or GPIOs, reducing PCB routing complexity and firmware overhead in bidirectional buses |
| VCC isolation | Guarantees high-impedance outputs when either VCCA or VCCB is unpowered, preventing backfeed and latch-up in mixed-power-domain systems |
| NanoFree™ packaging | SC70-6 footprint (2.00 mm × 1.25 mm) uses die-as-package construction, minimizing parasitic inductance and enabling ultra-dense layout in mobile PCBs |
| Ioff partial-power-down | Disables I/Os during power-down sequencing, blocking damaging reverse current flow between active and inactive voltage rails |
| Edge-rate acceleration | One-shot circuitry reduces rise/fall times (e.g., trB = 0.4–2.7 ns) to sustain 100 Mbps data rates across full VCCB range without signal integrity degradation |
Applications
| Smartphone Baseband–Application Processor Interface | Tablet USB OTG Data Line Translation |
|---|---|
|
Use Scenario: Interfacing a 1.8-V application processor GPIO bank with a 3.3-V baseband modem's control/status lines. IC Role / Device Role / Timing Role: Bidirectional level shifter enabling real-time handshaking and interrupt signaling without direction control logic. Use Value: Reduces BOM count by eliminating discrete MOSFET translators and saves 0.8 mm² PCB area versus SOT-23 alternatives. |
Use Scenario: Translating D+ and D− lines between a 3.3-V USB OTG controller and a 1.2-V USB PHY in a tablet SoC. IC Role / Device Role / Timing Role: High-speed bidirectional translator maintaining USB 2.0 full-speed (12 Mbps) timing integrity across voltage domains. Use Value: Enables compliance with USB electrical specifications while supporting dynamic VBUS detection and session request signaling. |
| Laptop Embedded Controller (EC)–Keyboard Matrix | Industrial Handheld Scanner Logic Interface |
|
Use Scenario: Connecting a 3.3-V embedded controller to a 1.8-V keyboard matrix scan driver in an ultrabook design. IC Role / Device Role / Timing Role: Low-leakage (5 μA ICC) translator allowing EC to remain active in S3 sleep while preserving keyboard wake capability. Use Value: Eliminates need for level-shifting buffers with external enable control, simplifying power-state coordination in ACPI-compliant systems. |
Use Scenario: Bridging a 5-V barcode scanner engine's status/control lines to a 1.5-V ARM Cortex-M0+ microcontroller in a ruggedized handheld. IC Role / Device Role / Timing Role: Robust translator with ±15 kV HBM ESD protection on B port, surviving repeated electrostatic discharge in field-deployed devices. Use Value: Replaces discrete TVS + MOSFET solutions, cutting component count by 4× and improving long-term reliability in harsh ESD environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional level-shifting applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TXS0101DCKR | Open-drain architecture with stronger pull-down; no VCC isolation; lower max data rate (60 Mbps at 1.8V) | Required for I²C, SMBus, or 1-Wire open-drain buses; unsuitable for push-pull UART/SPI where TXB0101DCKR excels | Select TXS0101DCKR only when protocol mandates open-drain behavior; TXB0101DCKR is preferred for CMOS push-pull interfaces. |
| SN74AVC1T45DCKR | Direction-controlled (DIR pin required); no auto-sensing; higher ICC (24 μA); no VCC isolation; ±8 kV HBM on both ports | Requires dedicated GPIO for direction management; better for deterministic unidirectional or controlled-bidirectional paths | Choose SN74AVC1T45DCKR when board layout allows DIR signal routing and higher leakage is acceptable; TXB0101DCKR saves GPIO and reduces firmware complexity. |
Compared with TXS0101DCKR and SN74AVC1T45DCKR, TXB0101DCKR uniquely delivers auto-direction sensing, VCC isolation, and industry-leading ±15 kV B-port ESD in the SC70-6 package-making it optimal for compact, mixed-voltage, push-pull interfaces where GPIO count and system robustness are critical.
Availability
TXB0101DCKR is available at Aetrix Electronics and suitable for smartphone baseband interfacing, tablet USB OTG data line translation, and industrial handheld scanner logic interfaces requiring stable component supply, consistent SC70-6 packaging, and guaranteed long-term manufacturability.
Supply support for TXB0101DCKR 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, embedded processing, and connectivity technologies for industrial, automotive, and consumer applications.
The TXB0101DCKR belongs to TI's voltage translation portfolio, engineered specifically for space-constrained, low-power, mixed-voltage digital interfaces requiring automatic bidirectional level shifting without external control logic.
FAQ
What voltage combinations are supported by the TXB0101DCKR?
The TXB0101DCKR supports A-port voltages from 1.2 V to 3.6 V and B-port voltages from 1.65 V to 5.5 V, with the strict requirement that VCCA ≤ VCCB. Valid combinations include 1.8 V ↔ 3.3 V, 1.2 V ↔ 1.8 V, and 3.3 V ↔ 5 V. It does not support VCCA > VCCB or open-drain protocols like I²C.
Does the TXB0101DCKR require external direction-control signals?
No, the TXB0101DCKR features auto direction-sensing and requires no external DIR pin or firmware control. Its internal one-shot circuitry detects signal edges on either port and dynamically enables the appropriate output driver-enabling true bidirectional translation with zero latency and no GPIO overhead.
How does the VCC isolation feature function in the TXB0101DCKR?
When either VCCA or VCCB is driven to GND (e.g., during power-down sequencing), the TXB0101DCKR automatically places both A and B ports into high-impedance state. This prevents back-current flow between powered and unpowered domains, eliminating risk of latch-up or damage in multi-rail systems.
What is the maximum data rate achievable with the TXB0101DCKR?
The TXB0101DCKR achieves up to 100 Mbps at VCCA = 3.3 V ± 0.3 V with VCCB = 3.3 V or 5 V. At lower voltages-such as VCCA = 1.2 V-the max rate drops to 20 Mbps. Performance is validated across temperature (–40°C to 85°C) and all supported SC70-6 package variants.
Can the TXB0101DCKR be used for I²C level translation?
No, the TXB0101DCKR is designed exclusively for push-pull CMOS logic and cannot translate open-drain I²C signals. Attempting I²C use may cause bus contention or failure to release the line. For I²C, TI recommends the TXS0101DCKR, which features strong pull-down drivers and open-drain compatibility.
TXB0101DCKR 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:
- 1
- Voltage - VCCA:
- 1.2 V ~ 3.6 V
- Voltage - VCCB:
- 1.65 V ~ 5.5 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Tri-State, Non-Inverted
- Data Rate:
- 100Mbps
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- Auto-Direction Sensing
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TSSOP, SC-88, SOT-363
TXB0101DCKR FAQ
1.How can I place an order for TXB0101DCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TXB0101DCKR 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 TXB0101DCKR reliable?
The price and inventory of TXB0101DCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TXB0101DCKR is usually 5 days.
3.What payment methods are accepted for TXB0101DCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TXB0101DCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TXB0101DCKR?
TXB0101DCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TXB0101DCKR 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 TXB0101DCKR?
For technical support, including TXB0101DCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TXB0101DCKR requirements.
6.How does Aetrix verify that TXB0101DCKR is sourced from the original manufacturer or authorized distributors?
All TXB0101DCKR 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 TXB0101DCKR meets industry standards.
7.What is the process for return or replacement of TXB0101DCKR?
All TXB0101DCKR units undergo pre-shipment inspection (PSI). If there is an issue with TXB0101DCKR, 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 TXB0101DCKR part is unused and in its original packaging.
Return procedure for TXB0101DCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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