Overview
The TXB0104DG4, produced by Texas Instruments, is a 4-bit noninverting bidirectional voltage-level translator. This device is designed to facilitate universal low-voltage translation between different voltage nodes, making it versatile for various electronic systems. The TXB0104 uses two separate configurable power-supply rails: the A port tracks VCCA, accepting supply voltages from 1.2 V to 3.6 V, and the B port tracks VCCB, accepting supply voltages from 1.65 V to 5.5 V. This allows for bidirectional translation between voltage nodes such as 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, and 5 V, ensuring compatibility with a wide range of devices and systems.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage, VCCA | - | -0.5 | - | 4.6 | V |
| Supply Voltage, VCCB | - | -0.5 | - | 6.5 | V |
| Input Voltage, VI (A port) | - | -0.5 | - | 4.6 | V |
| Input Voltage, VI (B port) | - | -0.5 | - | 6.5 | V |
| Output Voltage, VO (A port) | High or Low State | -0.5 | - | VCCA + 0.5 | V |
| Output Voltage, VO (B port) | High or Low State | -0.5 | - | VCCB + 0.5 | V |
| Propagation Delay (A to B) | VCCA = 1.8 V, VCCB = 1.8 V | 1.5 | - | 7.1 | ns |
| Propagation Delay (B to A) | VCCA = 1.8 V, VCCB = 1.8 V | 1.2 | - | 6.5 | ns |
| Maximum Data Rate | - | - | - | 100 | Mbps |
| ESD Protection (Human-Body Model) | A Port | - | - | 2500 | V |
| ESD Protection (Human-Body Model) | B Port | - | - | ±15 kV | V |
Key Features
- Universal low-voltage bidirectional translation between 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, and 5 V voltage nodes.
- Two separate configurable power-supply rails: VCCA (1.2 V to 3.6 V) and VCCB (1.65 V to 5.5 V).
- Output enable (OE) input circuit referenced to VCCA, allowing outputs to be placed in a high-impedance state when OE is low.
- Low power consumption: maximum ICC of 5 µA.
- IOFF supports partial power-down mode operation, preventing damaging current backflow.
- Latch-up performance exceeds 100 mA per JESD 78, Class II.
- ESD protection exceeds JESD 22 standards: 2500 V for the A port and ±15 kV for the B port (Human-Body Model).
- Automatic direction sensing without the need for a direction-control signal.
- Support for high-speed data rates up to 100 Mbps.
Applications
- Level-translation applications for interfacing devices or systems operating at different interface voltages.
- Headsets and audio equipment.
- Smartphones and mobile devices.
- Tablets and handheld devices.
- Desktop PCs and other computer peripherals.
Q & A
- What is the voltage range for the A port of the TXB0104?
The A port of the TXB0104 accepts supply voltages from 1.2 V to 3.6 V.
- What is the voltage range for the B port of the TXB0104?
The B port of the TXB0104 accepts supply voltages from 1.65 V to 5.5 V.
- How does the output enable (OE) input work?
The OE input, when low, places all outputs in the high-impedance state. It must be tied to GND through a pulldown resistor to ensure this state during power up or power down.
- What is the maximum data rate supported by the TXB0104?
The TXB0104 supports data rates up to 100 Mbps.
- What kind of ESD protection does the TXB0104 offer?
The TXB0104 offers ESD protection exceeding JESD 22 standards: 2500 V for the A port and ±15 kV for the B port (Human-Body Model).
- Does the TXB0104 support partial power-down mode?
Yes, the TXB0104 is fully specified for partial power-down applications using IOFF circuitry.
- What is the typical output impedance of the TXB0104 during output transitions?
The typical output impedance is 70 Ω at VCCO = 1.2 V to 1.8 V, 50 Ω at VCCO = 1.8 V to 3.3 V, and 40 Ω at VCCO = 3.3 V to 5 V.
- What are the package options available for the TXB0104?
The TXB0104 is available in various packages including SOIC, TSSOP, UQFN, BGA MICROSTAR JUNIOR™, VQFN, and DSBGA.
- How does the automatic direction sensing work in the TXB0104?
The TXB0104 does not require a direction-control signal. The output drivers maintain a high or low state but are designed to be weak, allowing them to be overdriven by an external driver when data on the bus starts flowing in the opposite direction.
- What is the minimum drive strength required for the device driving the data I/O of the TXB0104?
The device driving the data I/O of the TXB0104 must have a drive strength of at least ±2 mA.
