Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Channels | 2 noninverting bidirectional channels |
| Direction | Automatic direction sensing; no DIR pin |
| A-Side Supply | 1.2 V to 3.6 V |
| B-Side Supply | 1.65 V to 5.5 V; VCCA ≤ VCCB |
| Isolation | Outputs high impedance if either VCC is at 0 V or OE low |
| Power | 4 µA maximum ICC stated |
| Protection | Ioff partial-power-down support; B-port ±15-kV HBM stated |
| Exact Package / Packing | VSSOP (DCU), 8 pins; 3000-piece large reel; −40°C to +85°C |
Product Overview
TXB0102DCUR is an active auto-direction translator intended mainly for push-pull digital signals. Internal edge-detection/one-shot circuitry senses which side is driving and temporarily strengthens the translated edge, so no direction-control pin is needed.
That architecture is materially different from LSF/PCA pass-FET translators. Strong external pull-ups, open-drain buses or devices with heavy output loading can fight the TXB driver and cause poor edges or oscillation; I²C is therefore generally not the natural use case.
VCC isolation and Ioff behavior help prevent back-powering when one domain is off. The DCUR exact order code is the VSSOP-8 3000-piece large-reel option.
For related devices, see HKEQGOO’s Translators, Level Shifters category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | TXB0102DCUR |
| Channels | 2 noninverting bidirectional channels |
| Direction | Automatic direction sensing; no DIR pin |
| A-Side Supply | 1.2 V to 3.6 V |
| B-Side Supply | 1.65 V to 5.5 V; VCCA ≤ VCCB |
| Isolation | Outputs high impedance if either VCC is at 0 V or OE low |
| Power | 4 µA maximum ICC stated |
| Protection | Ioff partial-power-down support; B-port ±15-kV HBM stated |
| Exact Package / Packing | VSSOP (DCU), 8 pins; 3000-piece large reel; −40°C to +85°C |
| Manufacturer Status | Active / Production |
| Part Marking | FD/NFD family markings per TI addendum |
Functional Highlights
Automatic direction works well for lightly loaded push-pull buses
GPIO, SPI-like data or other point-to-point signals can change direction without a dedicated DIR line.
Power-domain isolation improves multi-rail sequencing
When either supply is absent, the translator does not intentionally drive the unpowered side through its outputs.
Design Considerations
- Avoid strong pull-ups/pull-downs and open-drain buses unless the exact TXB application conditions support them.
- Keep capacitive loading and trace length low enough for the auto-direction edge accelerator to work correctly.
- Respect VCCA ≤ VCCB and OE sequencing.
Product Status and Exact Order Code
Texas Instruments lists TXB0102DCUR as Active / Production; VSSOP (DCU), 8 pins; 3000-piece large tape and reel; −40°C to +85°C.
Related Engineering Resources
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
Request a Quote
To request a quotation, provide the manufacturer part number, required quantity, destination, target Date Code if applicable, and any testing or inspection requirements.
