TXB0604 - 4-Bit Auto-Bidirectional Level Translator 345Mbps | TI
MPN: TXB0604 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.75 | $0.75 |
| 10 | $0.68 | $6.80 |
| 100 | $0.55 | $55.00 |
| 500 | $0.46 | $230.00 |
| 1,000 | $0.38 | $380.00 |
Drop-in alternatives for TXB0604 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TXB0104PWR
✅ Drop-In📋 Reference alternative (not in catalog)
TXS0104E
⚡ Same Package📋 Reference alternative (not in catalog)
SN74AVC4T245QPWRQ1
⚡ Same Package✓ In Stock
$0.85 / Unit
View Datasheet →ADG3304
⚡ Same Package📋 Reference alternative (not in catalog)
TXB0604 Maximum Ratings & Electrical Characteristics
| Function | 4-bit non-inverting auto-bidirectional voltage level translator |
| Channels | 4 |
| Data Rate | 345 Mbps (15pF load) |
| Data Rate (heavy load) | 190 Mbps (100pF load) |
| VCCA Range | 0.9 V to 2 V |
| VCCB Range | 1.65 V to 3.6 V |
| Supply Constraint | VCCA <= VCCB |
| Direction Control | Auto-bidirectional (no DIR pin) |
| Protection Features | Partial power-down (Ioff), Vcc disconnect, Vcc isolation |
| Pull-up Resistors | Integrated on A and B ports |
| Package (PWR) | 14-TSSOP |
| Package (RWBR) | 12-X2QFN 1.6x1.6 mm |
| Package Feature | Wettable flanks |
| Mounting Type | Surface Mount |
| Typical Interfaces | Quad-SPI, Octal-SPI, eSPI |
| RoHS Status | [DATA_NEEDED: RoHS status] |
TXB0604 wettable flanks Pin Configuration Guide
Complete pinout information for TXB0604 (wettable flanks package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for TXB0604.
Refer to the datasheet for full pin configuration.
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TXB0604 is suitable for 6 applications: Quad-SPI BMC-to-Flash Interface, Server Management and Networking, Mixed-Voltage Processor-to-Peripheral Links, Long-Cable Line Redriving, Industrial Control Systems, Automotive and eSPI Subsystems.
Quad-SPI BMC-to-Flash Interface
The TXB0604's primary application is translating Quad-SPI buses between a Baseboard Management Controller operating at 1.2V or 1.8V and 3.3V Flash memory. Its 345Mbps data rate at 15pF load sustains QSPI clock rates above 80MHz, while the patented low-parasitic output design avoids the signal-integrity degradation that legacy translators introduce on four data plus clock lines. Placed directly in the QSPI path with short traces, it functions as both a translator and redriver; integrated pull-ups keep command lines defined during partial power-down of either rail.
Recommended
Server Management and Networking
In servers and networking equipment, the TXB0604 bridges low-voltage management ASICs (0.9V to 2V VCCA) to 3.3V peripheral buses such as eSPI and system Flash. The 190Mbps rate at 100pF load tolerates heavily loaded backplane traces, and Vcc isolation prevents one rail from back-powering devices during sequenced power-up. Wettable-flank packages support automated optical inspection required in server-grade manufacturing, and Ioff partial power-down allows hot-swap style card insertion without latch-up.
Recommended
Mixed-Voltage Processor-to-Peripheral Links
When a low-voltage processor communicates with higher-voltage peripherals such as sensors, FPGAs, or displays, the TXB0604 provides four auto-bidirectional channels without a direction pin, suiting half-duplex buses like SPI and shared command/data lines. VCCA down to 0.9V supports advanced process nodes operating at sub-1.2V core I/O, while VCCB to 3.6V covers 3.3V peripherals. The one-shot edge accelerator preserves rise times, so signal timing margins remain intact across the voltage domain crossing.
Recommended
Long-Cable Line Redriving
TI positions the TXB0604 as a voltage translator and line redriver: its boosted output drive can remedy voltage-domain mismatches while boosting signals transmitted over long cables, where capacitance can reach 100pF or more. Even at 100pF, the device sustains over 190Mbps, enough for cable-linked display, industrial sensor, and backplane interconnects. Auto direction sensing eliminates a GPIO for the direction pin, which is often impractical over remote cable runs where both ends may drive.
Recommended
Industrial Control Systems
Industrial controllers frequently mix 1.8V DSP I/O with legacy 3.3V sensors and actuators. The TXB0604 translates four channels of control or serial data with 345Mbps headroom, far exceeding industrial UART, SPI, and parallel control rates, providing margin for future speed upgrades. Its 14-TSSOP package is hand-solderable for prototyping, wettable flanks enable AOI in production, and Vcc disconnect behavior keeps the A-side protected when the low-voltage controller rail collapses during faults or maintenance.
Recommended
Automotive and eSPI Subsystems
The TXB0604 supports eSPI and automotive-adjacent subsystems where wettable-flank, low-parasitic packages are required for inspection and reliability. It shifts between embedded-controller I/O rails and 3.3V platform buses, and the Ioff feature ensures safe behavior during the multi-rail power sequencing typical of vehicle ECUs and gateways. Combined with Q1-rated companions in the system BOM, the TXB0604 fills the mixed-voltage translation slot between MCUs and Flash or peripheral bridges.
Recommended
Recommended Products Summary
Engineering reference data for TXB0604 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TXB0104PWR | TXS0104E | SN74AVC4T245QPWRQ1 |
|---|---|---|---|---|
| Package | 14-TSSOP / 12-X2QFN | 14-TSSOP - same | 14-TSSOP - same | 14-TSSOP - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Data Rate | 345 Mbps (15pF) | 100 Mbps | [DATA_NEEDED] | [DATA_NEEDED] |
| Direction Control | Auto-bidirectional | Auto-bidirectional | DIR pins | Auto-bidirectional |
| Channels | 4 | 4 | 4 | 4 |
| VCCA Minimum | 0.9 V | 1.2 V | 1.65 V | 1.2 V |
| Vcc Isolation | Yes | No | Partial power-down only | No |
| Line Redriver Boosting | Yes | No | No | No |
| Price (qty 1) | $0.75 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- 345Mbps throughput at 15pF load (vs TXB0104PWR)
- Integrated line-redriver signal boosting (vs TXS0104E)
- No direction-control GPIO required (vs SN74AVC4T245QPWRQ1)
Design Notes
Observe the VCCA <= VCCB constraint at all times, including during power sequencing and faults. Decouple VCCA and VCCB each with 0.1uF ceramic capacitors placed within 2mm of the pins. The device supports Vcc isolation and partial power-down (Ioff), but verify that neither rail is driven above its absolute range (VCCA max 2V, VCCB max 3.6V) by external pull-ups to other domains.
Data rate depends strongly on load capacitance: 345Mbps at 15pF but only 190Mbps at 100pF. Keep QSPI/OSPI traces short and matched; for long cable runs, rely on the line-redriver drive but re-verify eye margins at your actual cable capacitance. TI app report SDAA333 provides comparative waveform measurements versus the TXB0104 to guide margin analysis.
Do not substitute the TXB0104 into a TXB0604 footprint above 100Mbps; the legacy part will fail timing on Quad-SPI clocks above roughly 50MHz. Avoid floating unused A/B inputs in Ioff mode by tying them through defined resistors, and do not connect open-drain buses (I2C) to this push-pull TXB family - use the TXS family instead.
Compliance Information
Compliance data not present in provided web data; consult TI product page for RoHS/REACH status.
