Overview
The TXB0104NMNR, produced by Texas Instruments, is a 4-bit bidirectional voltage-level translator designed for interfacing devices or systems operating at different interface voltages. This device uses two separate configurable power-supply rails, allowing for universal low-voltage bidirectional translation between various voltage nodes ranging from 1.2 V to 5.5 V. The TXB0104 is particularly useful in applications where different voltage domains need to communicate, ensuring seamless data transfer without the need for external level-shifting components.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Supply Voltage (VCCA) | Range of supply voltage for A port | 1.2 V to 3.6 V |
| Supply Voltage (VCCB) | Range of supply voltage for B port | 1.65 V to 5.5 V |
| Data Rate | Maximum data transfer rate | Up to 100 Mbps |
| Propagation Delay Time (A-to-B) | Typical propagation delay from A to B port | 5.7 ns (typical at VCCA = 1.2 V, VCCB = 1.8 V) |
| Propagation Delay Time (B-to-A) | Typical propagation delay from B to A port | 6.4 ns (typical at VCCA = 1.2 V, VCCB = 1.8 V) |
| Enable Time (OE-to-A/B) | Time for output enable to take effect | 1 μs |
| Disable Time (OE-to-A/B) | Time for output disable to take effect | 14 ns to 20 ns |
| Input Clamp Current | Maximum current when input voltage is below 0 V | -50 mA |
| Package Options | Available package types | UQFN, SOIC, BGA MICROSTAR JUNIOR, TSSOP, VQFN, DSBGA, NFBGA |
| Operating Temperature Range | Range of temperatures for device operation | -40°C to 85°C |
Key Features
- Bidirectional Voltage-Level Translation: Supports translation between different voltage nodes (1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, and 5 V).
- Automatic Direction Sensing: Automatically senses the direction of data flow without the need for external direction-control signals.
- High-impedance State: Outputs enter a high-impedance state when the OE input is low, ensuring no current flow during power-up or power-down.
- Partial Power-Down Capability: IOFF circuitry disables outputs to prevent backflow current when the device is powered down.
- ESD Protection: ±15-kV Human-Body Model (A114-B) and 1500-V Charged-Device Model (C101) ESD protection.
- Low Input Capacitance: Input capacitance as low as 3 pF to 14 pF depending on the port.
Applications
- Headsets: For voltage translation in audio interfaces.
- Smartphones and Tablets: To manage different voltage domains within mobile devices.
- Desktop PCs: For interfacing peripherals with different voltage requirements.
- Embedded Systems: In various embedded systems where multiple voltage domains are present.
Q & A
- What is the primary function of the TXB0104?
The primary function of the TXB0104 is to perform bidirectional voltage-level translation between different voltage domains.
- What are the acceptable supply voltage ranges for VCCA and VCCB?
VCCA can range from 1.2 V to 3.6 V, and VCCB can range from 1.65 V to 5.5 V.
- How does the TXB0104 handle power-up and power-down states?
The device ensures a high-impedance state during power-up or power-down by tying the OE input to GND through a pulldown resistor.
- What is the maximum data rate supported by the TXB0104?
The TXB0104 supports a maximum data rate of up to 100 Mbps.
- Does the TXB0104 have ESD protection?
Yes, the TXB0104 has ±15-kV Human-Body Model (A114-B) and 1500-V Charged-Device Model (C101) ESD protection.
- What are the available package options for the TXB0104?
The TXB0104 is available in UQFN, SOIC, BGA MICROSTAR JUNIOR, TSSOP, VQFN, DSBGA, and NFBGA packages.
- What is the operating temperature range of the TXB0104?
The operating temperature range is -40°C to 85°C.
- How does the IOFF circuitry work in the TXB0104?
The IOFF circuitry disables the outputs to prevent damaging current backflow when the device is powered down.
- What is the typical output impedance of the TXB0104 during output transitions?
The typical output impedance varies from 40 Ω to 70 Ω depending on the VCCO voltage.
- What is the purpose of the OE input in the TXB0104?
The OE input controls the output state; when low, it places all outputs in a high-impedance state.
