Specifications
| Type | Description |
|---|---|
| Part Number | TXB0302 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package / Case | DQM MicroQFN / X2SON, 8 pins |
| Channel Count | 2-bit; bidirectional noninverting translator |
| Direction Control | Automatic direction sensing; no direction-control signal required |
| A-Port Supply Voltage Range | 0.9 to 3.6 V; VCCA recommended operating range |
| B-Port Supply Voltage Range | 0.9 to 3.6 V; VCCB recommended operating range |
| Supported Translation Nodes | 1 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V; low-voltage bidirectional translation |
| VCC Isolation | All outputs high-impedance if either VCC input is at GND; power-off / isolation feature |
| Output Enable Reference | OE input circuit referenced to VCCA; output-enable input |
| Output Disable State | All I/Os high-impedance; OE = low |
| A-Port High-Level Input Voltage | 0.65 × VCCI min; data inputs, VCCA/VCCB = 0.9 to 3.6 V |
| OE High-Level Input Voltage | 0.65 × VCCA min to 3.6 V max; OE input, VCCA/VCCB = 0.9 to 3.6 V |
| Data Input Low-Level Voltage | 0 to 0.35 × VCCI V; data inputs, VCCA/VCCB = 0.9 to 3.6 V |
| OE Low-Level Input Voltage | 0 to 0.35 × VCCA V; OE input, VCCA/VCCB = 0.9 to 3.6 V |
| High-Impedance Output Voltage Range | 0 to 3.6 V; A-port or B-port output in high-impedance or power-off state |
| A-Port Input Transition Rise/Fall Rate | 40 ns/V max; A-port inputs, VCCA/VCCB = 0.9 to 3.6 V |
| B-Port Input Transition Rise/Fall Rate | 40 ns/V max; B-port inputs, VCCA/VCCB = 0.9 to 3.6 V |
| Operating Free-Air Temperature | -40 to 85 °C; recommended operating condition |
| A-Port Output High Voltage | 0.9 × VCCA min; IOH = -20 µA, VCCA = 0.9 to 3.6 V |
| A-Port Output Low Voltage | 0.2 V max; IOL = 20 µA, VCCA = 0.9 to 3.6 V |
| B-Port Output High Voltage | 0.9 × VCCB min; IOH = -20 µA, VCCB = 0.9 to 3.6 V |
| B-Port Output Low Voltage | 0.2 V max; IOL = 20 µA, VCCB = 0.9 to 3.6 V |
| OE Input Leakage Current | ±1 µA typ, ±2 µA max; VI = VCCI or GND, VCCA/VCCB = 0.9 to 3.6 V |
| Power-Off Leakage Current | ±1 µA typ, ±2 µA max; Ioff, A port or B port, VI or VO = 0 to 3.6 V |
| High-Impedance Output Leakage | ±1 µA typ, ±2 µA max; IOZ, A or B port, OE = GND, VCCA/VCCB = 0.9 to 3.6 V |
| A-Supply Current | 5 µA max; ICCA, VI = VCCI or GND, IO = 0, VCCA/VCCB = 0.9 to 3.6 V |
| B-Supply Current | 5 µA max; ICCB, VI = VCCI or GND, IO = 0, VCCA/VCCB = 0.9 to 3.6 V |
| Total Supply Current | 10 µA max; ICCA + ICCB, VI = VCCI or GND, IO = 0, VCCA/VCCB = 0.9 to 3.6 V |
| A-Supply Current Disabled | 5 µA max; ICCZA, VI = VCCI or GND, IO = 0, OE = GND |
| B-Supply Current Disabled | 5 µA max; ICCZB, VI = VCCI or GND, IO = 0, OE = GND |
| OE Input Capacitance | 3 pF typ; VCCA/VCCB = 0.9 to 3.6 V |
| A-Port I/O Capacitance | 9 pF typ; VCCA/VCCB = 0.9 to 3.6 V |
| B-Port I/O Capacitance | 12 pF typ; VCCA/VCCB = 0.9 to 3.6 V |
| Data Rate | 40 Mbps max; CL = 15 pF, VCCA/VCCB = 0.9 to 3.6 V |
| Data Rate | 100 Mbps max; CL = 15 pF, VCCA/VCCB = 1.2 to 3.6 V |
| Data Rate | 140 Mbps max; CL = 15 pF, VCCA/VCCB = 1.8 to 3.6 V |
| Data Rate | 40 Mbps max; CL = 30 pF, VCCA/VCCB = 0.9 to 3.6 V |
| Data Rate | 90 Mbps max; CL = 30 pF, VCCA/VCCB = 1.2 to 3.6 V |
| Data Rate | 120 Mbps max; CL = 30 pF, VCCA/VCCB = 1.8 to 3.6 V |
| Data Rate | 70 Mbps max; CL = 50 pF, VCCA/VCCB = 1.2 to 3.6 V |
| Data Rate | 100 Mbps max; CL = 50 pF, VCCA/VCCB = 1.8 to 3.6 V |
| Propagation Delay A to B | 18.9 ns typ, 62.5 ns max; CL = 15 pF, VCCA/VCCB = 0.9 to 3.6 V |
| Propagation Delay A to B | 7.5 ns typ, 15.5 ns max; CL = 15 pF, VCCA/VCCB = 1.2 to 3.6 V |
| Propagation Delay A to B | 3.7 ns typ, 5.8 ns max; CL = 15 pF, VCCA/VCCB = 1.8 to 3.6 V |
| Propagation Delay B to A | 18.9 ns typ, 62.6 ns max; CL = 15 pF, VCCA/VCCB = 0.9 to 3.6 V |
| Propagation Delay B to A | 7.5 ns typ, 15.4 ns max; CL = 15 pF, VCCA/VCCB = 1.2 to 3.6 V |
| Propagation Delay B to A | 3.7 ns typ, 5.8 ns max; CL = 15 pF, VCCA/VCCB = 1.8 to 3.6 V |
| Enable Time to A Port | 504 ns typ; OE to A, CL = 15 pF, VCCA/VCCB = 0.9 to 3.6 V |
| Enable Time to B Port | 356 ns typ; OE to B, CL = 15 pF, VCCA/VCCB = 0.9 to 3.6 V |
| Disable Time to A Port | 200 ns typ; OE to A, CL = 15 pF, VCCA/VCCB = 0.9 to 3.6 V |
| Disable Time to B Port | 200 ns typ; OE to B, CL = 15 pF, VCCA/VCCB = 0.9 to 3.6 V |
| B-Port Rise/Fall Time | 2.95 ns typ; CL = 15 pF, VCCA/VCCB = 0.9 to 3.6 V |
| A-Port Rise/Fall Time | 3.1 ns typ; CL = 15 pF, VCCA/VCCB = 0.9 to 3.6 V |
| Channel-to-Channel Skew | 0.5 ns typ; CL = 15 pF, VCCA/VCCB = 0.9 to 3.6 V |
| Maximum Capacitive Load | 50 pF; designed to drive capacitive loads up to this value |
| External Pullup/Pulldown Resistor Requirement | >20 kΩ; if pullup or pulldown resistors are connected to data I/Os |
| Required External Driver Strength | ±3 mA minimum; device driving TXB0302 data I/Os for proper operation |
| Output Impedance During Transition | 35 Ω typ; VCCO = 0.9 to 1.1 V |
| Output Impedance During Transition | 25 Ω typ; VCCO = 1.2 to 3.3 V |
| Latch-Up Performance | >100 mA; per JESD78 Class II |
| ESD Human-Body Model | 4000 V; JESD22 A114-B |
| ESD Charged-Device Model | 1000 V; JESD22 C101 |
| Absolute Maximum Supply Voltage | -0.5 to 4.6 V; VCCA or VCCB |
| Absolute Maximum A-Port Input Voltage | -0.5 to 4.6 V; input voltage range |
| Absolute Maximum B-Port Input Voltage | -0.5 to 6.5 V; input voltage range |
| Continuous Output Current | ±50 mA; absolute maximum rating |
| Continuous Current Through Supply or Ground | ±100 mA; through VCCA, VCCB, or GND |
| Storage Temperature Range | -65 to 150 °C; absolute maximum rating |
| Package Thermal Impedance | 259 °C/W; DQM 8-pin package, θJA |
| Pin 1 | VCCA; A-port supply voltage, 0.9 V ≤ VCCA ≤ 3.6 V |
| Pin 2 | A1; input/output 1 referenced to VCCA |
| Pin 3 | A2; input/output 2 referenced to VCCA |
| Pin 4 | GND; ground |
| Pin 5 | OE; 3-state output-mode enable; pull low to place outputs in 3-state mode |
| Pin 6 | B2; input/output 2 referenced to VCCB |
| Pin 7 | B1; input/output 1 referenced to VCCB |
| Pin 8 | VCCB; B-port supply voltage, 0.9 V ≤ VCCB ≤ 3.6 V |
| Orderable Part Number | TXB0302DQMR; DQM MicroQFN package |
| Top-Side Marking | 77A; TXB0302DQMR |
| Datasheet Status | request_only |
Product Overview
The TXB0302 is a Texas Instruments 2-bit bidirectional noninverting voltage-level translator for Signal_Chain designs that need low-voltage logic translation. Both the A-port and B-port supplies operate from 0.9 to 3.6 V, supporting translation nodes of 1 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V. Direction is sensed automatically, so no separate direction-control signal is required.
The device provides two I/O channels, with A1 and A2 referenced to VCCA and B1 and B2 referenced to VCCB. The OE input is referenced to VCCA; pulling OE low places all I/Os in the high-impedance state. If either VCC input is at GND, all outputs are also high-impedance for power-off isolation.
TXB0302 is supplied in an 8-pin DQM MicroQFN / X2SON package. It is specified for -40 to 85 °C free-air operation, supports data rates up to 140 Mbps under the stated load and supply conditions, and is designed to drive capacitive loads up to 50 pF.
Key Features
- 2-bit bidirectional noninverting voltage-level translation
- Automatic direction sensing without direction-control signal
- VCCA and VCCB operate from 0.9 to 3.6 V
- Supports 1 V through 3.3 V translation nodes
- All I/Os high-impedance when OE is low
- Power-off isolation when either VCC input is grounded
- Data rates up to 140 Mbps at specified conditions
- Designed for capacitive loads up to 50 pF
- -40 to 85 °C recommended free-air operation
- 8-pin DQM MicroQFN / X2SON package
Typical Applications
- Low-voltage logic translation
- Bidirectional two-bit signal interfaces
- 1 V to 3.3 V translation paths
- OE-controlled bus isolation
- Power-off isolated signal lines
- Capacitive loads up to 50 pF
- Compact 8-pin signal-chain designs
Procurement Notes
When requesting a quote for TXB0302, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What type of device is the TXB0302?
The TXB0302 is a Texas Instruments 2-bit bidirectional noninverting voltage-level translator. It is categorized as Signal_Chain and supports low-voltage bidirectional translation between nodes including 1 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V.
Does TXB0302 require a direction-control signal?
No. TXB0302 uses automatic direction sensing, so no direction-control signal is required. Its OE input is referenced to VCCA and can place all I/Os into a high-impedance state when driven low.
What supply voltage ranges does TXB0302 support?
The recommended operating range is 0.9 to 3.6 V for both VCCA and VCCB. The A-port I/Os are referenced to VCCA, while the B-port I/Os are referenced to VCCB.
What happens when TXB0302 is disabled or powered off?
When OE is low, all I/Os are placed in the high-impedance state. The device also provides VCC isolation: if either VCC input is at GND, all outputs are high-impedance.
What package and orderable part number are specified?
The package is DQM MicroQFN / X2SON with 8 pins. The orderable part number listed for the DQM MicroQFN package is TXB0302DQMR, with top-side marking 77A.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.