TXB0604 - 4-Bit Auto-Bidirectional Level Translator 345Mbps | TI
MPN: TXB0604 ✓ פעילTXB0604 סקירה
A voltage level translator is an integrated circuit that allows digital signals to cross between different voltage domains, ensuring valid logic levels and signal integrity in mixed-voltage systems. Within the interface hierarchy, level shifters sit between logic devices and buses, and auto-bidirectional translators eliminate the direction-control pin by automatically sensing data flow.
Key features include TI's patented architecture achieving high data throughput for memory-intensive interfaces like Quad-SPI between a Baseboard Management Controller (BMC) and Flash devices, without signal-integrity losses from excessive output parasitic capacitance. The device also provides partial power-down protection (Ioff), Vcc disconnect, Vcc isolation, and integrated pull-up resistors on the A and B ports. Wettable-flank packages enhance solder-joint inspection for automotive-quality assembly.
Technically, the TXB0604 functions as both a voltage translator and a line redriver: a one-shot edge accelerator sharpens rising edges, reducing propagation delay, while boosted drive strength enables signal boosting over long-cable transmission. Compared to the legacy TXB0104 (100Mbps), the TXB0604 delivers over 3x the data rate with stronger capacitive load driving.
Typical applications include Quad-SPI and Octal-SPI buses between BMCs and Flash memory, eSPI interfaces, and mixed-voltage processor-to-peripheral links in servers, networking equipment, and industrial systems.
Design tip: always ensure VCCA <= VCCB, place decoupling capacitors close to both supply pins, and avoid floating unused inputs in partial power-down states. Pricing below is as of 2026-08-30.
חלופות תחליף ישיר עבור TXB0604 — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם TXB0604 (אותו גורם צורה וטביעת רגל) — שונים ב Channels, Direction Control.
TXB0104PWR
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
TXB0104QRUTRQ1
⚡ אותה מארזהצור קשר לקבלת מחיר
הצג גיליון נתונים ←TXU0104PWR
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
TXU0204PWR
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
ADG3304BRUZ
⚡ אותה מארזה📋 חלופה להתייחסות (לא בקטלוג)
TXB0604 מפרטים
| פונקציה | 4-bit non-inverting auto-bidirectional voltage level translator / line redriver |
| קצב נתונים | 345 Mbps (15 pF load) |
| Data Rate (100 pF load) | 190 Mbps |
| VCCA Range (A port) | 0.9 V to 2 V |
| VCCB Range (B port) | 1.65 V to 3.6 V |
| Supply Constraint | VCCA <= VCCB |
| ערוצים | 4 |
| Direction Control | Auto-bidirectional (no DIR pin) |
| Package (primary) | 14-TSSOP (PWR) |
| Package (alternative) | 12-X2QFN 1.6x1.6 mm (RWBR) |
| Ioff (Partial Power-Down) | Yes |
| Vcc Isolation | Yes |
| Integrated Pull-ups | Yes (A and B ports) |
| Special Features | Vcc disconnect, one-shot edge accelerator, wettable flank option |
| סטטוס RoHS | Compliant |
תצורת פינים של TXB0604
| פין 1 | VCCA — A-port supply, 0.9V to 2V |
| פין 2 | A1 — A-port data 1 (auto-bidirectional) |
| פין 3 | A2 — A-port data 2 (auto-bidirectional) |
| פין 4 | A3 — A-port data 3 (auto-bidirectional) |
| פין 5 | A4 — A-port data 4 (auto-bidirectional) |
| פין 6 | GND — Ground |
| פין 7 | NC / OE — No connect or output enable per package datasheet |
| פין 8 | B4 — B-port data 4 (auto-bidirectional) |
| פין 9 | B3 — B-port data 3 (auto-bidirectional) |
| פין 10 | B2 — B-port data 2 (auto-bidirectional) |
| פין 11 | B1 — B-port data 1 (auto-bidirectional) |
| פין 12 | VCCB — B-port supply, 1.65V to 3.6V |
| פין 13 | NC — No connect (TSSOP-14) |
| פין 14 | NC — No connect (TSSOP-14) |
יישומים טיפוסיים
TXB0604 מתאים עבור 6 יישוםs: Quad-SPI BMC-to-Flash Interface, Server and Datacenter Mixed-Voltage I/O, Networking Equipment Line Redriving, Industrial Automation Interfaces, Automotive-Quality Assembly Modules, eSPI and Low-Voltage Bus Expansion.
Quad-SPI BMC-to-Flash Interface
The TXB0604's flagship application: translating Quad-SPI signals between a low-voltage Baseboard Management Controller and 3.3V NOR flash in servers. Its patented architecture sustains 345Mbps at 15pF load without the signal-integrity losses caused by excessive output parasitic capacitance found in conventional translators. Placed between the BMC SPI master and the W25Q-class flash, the one-shot edge accelerator sharpens edges so the 50-100MHz quad clock meets flash timing margins even with board trace capacitance, while Ioff protection allows safe sequencing during partial power-down states.
מומלץ
Server and Datacenter Mixed-Voltage I/O
Servers routinely mix 1.2V/1.8V silicon with 3.3V legacy peripherals. The TXB0604 bridges these domains with VCCA down to 0.9V and VCCB up to 3.6V, under the VCCA <= VCCB rule. Vcc isolation and Vcc disconnect features ensure that when one rail collapses, the translator outputs do not back-drive the powered-down domain, protecting BMC and CPLD I/O rings. The 4-bit width matches common control and status buses, and auto-direction sensing removes firmware-managed DIR pins, reducing software complexity in dense datacenter platforms.
מומלץ
Networking Equipment Line Redriving
In switches and routers, control signals traverse long board traces or backplane cabling that add significant capacitance. The TXB0604 doubles as a line redriver: boosted drive strength and the edge accelerator restore rise times degraded by cable capacitance, sustaining over 190Mbps even with 100pF loads. This remedies voltage domain mismatches and signal attenuation simultaneously, which legacy translators like TXB0104 cannot do at speed. Place the device near the cable connector for maximum benefit, with local decoupling on both VCCA and VCCB rails.
מומלץ
Industrial Automation Interfaces
Industrial PLC and sensor systems combine low-voltage MCUs (1.8V class) with 3.3V or 5V-tolerant field I/O. The TXB0604's four auto-bidirectional channels shift SPI or parallel status buses without direction control logic, and Ioff partial power-down protection is essential where modules are hot-plugged or powered independently. Integrated pull-ups on both ports hold undefined lines at valid levels during startup, preventing glitch-triggered state machine faults. Operating alongside industrial MCUs such as the MSPM0 family, it provides robust, glitch-free domain crossing on 4-bit buses.
מומלץ
Automotive-Quality Assembly Modules
The TXB0604 is offered in wettable-flank packages that enable automated optical inspection (AOI) and X-ray solder-joint inspection demanded by automotive-quality assembly lines. Translation between 1.2V domain controllers and 3.3V sensors or memories in ADAS and body-electronics modules benefits from Ioff protection and auto-direction operation, which tolerate the unsequenced power states common in vehicles. Where full AEC-Q100 qualification is mandatory, engineers should verify the specific orderable grade on the TI product page, as the summarized data does not state Q1 status.
מומלץ
eSPI and Low-Voltage Bus Expansion
The eSPI bus and similar low-voltage expansion interfaces run at 1.8V while companion devices or test points often require 3.3V. The TXB0604 translates these four-bit-wide buses at the speeds eSPI requires, and its redriver function compensates for the capacitance of socketed test fixtures and debug headers. Vcc isolation allows the debug rail to be removed without corrupting the main bus, and the compact 12-X2QFN (1.6x1.6mm) RWBR package fits the tight routing regions typical of expansion connector regions on modern embedded boards.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור TXB0604 — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | TXB0104PWR | TXB0104QRUTRQ1 | TXU0104PWR | ADG3304BRUZ |
|---|---|---|---|---|---|
| Package | 14-TSSOP (PWR) / 12-X2QFN (RWBR) | 14-TSSOP - same footprint | 14-SON (RUT) - different footprint | 14-TSSOP - same footprint | 14-TSSOP - pinout differs |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Direction Control | Auto-bidirectional | Auto-bidirectional | Auto-bidirectional | Fixed direction | Auto-bidirectional |
| VCCA Range | 0.9 V to 2 V | 1.2 V to 3.6 V | 1.2 V to 3.6 V | 1.65 V to 3.6 V | 1.15 V to 5.5 V |
| Ioff (Partial Power-Down) | Yes | No | No | Yes | No |
| Integrated Pull-ups | Yes (A and B) | Yes | Yes | Yes (integrated pull-ups/pull-downs) | No |
| Line Redriver / Edge Accelerator | Yes | No | No | No | No |
מבדילים עיקריים
- 345Mbps data rate vs 100Mbps legacy (לעומתTXB0104PWR)
- Line redriver with edge accelerator (לעומתTXB0104PWR)
- Partial power-down Ioff and Vcc isolation (לעומתTXB0104QRUTRQ1)
- Trade-off: fixed-direction siblings give cleaner timing (לעומתTXU0104PWR)
הערות תכנון
Always enforce VCCA <= VCCB in the power sequencing design; the TXB0604 datasheet constrains A-port supply (0.9V-2V) to never exceed B-port supply (1.65V-3.6V). Place 0.1uF ceramic decoupling capacitors within 2mm of both VCCA and VCCB pins. The Ioff and Vcc isolation features tolerate partial power-down, but floating rails during startup can still cause undefined bus states - add weak external pull-downs if the bus must be quiet at boot.
For Quad-SPI clock lines, keep traces short and series-terminate at the driver. The TXB0604's one-shot edge accelerator redrives edges, which helps at 100pF loads (190Mbps+), but the one-shot can interact with very slow or glitchy edges - avoid RC-filtered signals on translated channels. TI app note SDAA333 provides comparative waveforms vs TXB0104 for timing closure at high speeds.
Do not use the TXB family on open-drain buses such as I2C; the push-pull drive and integrated pull-ups cause contention - use TXS-family devices instead. Unused inputs should not float in partial power-down states. When substituting the legacy TXB0104 footprint, note the TXB0604's added Vcc isolation behavior can leave B-port outputs at valid logic rather than Hi-Z when A-side is unpowered, which may require system-level review.
מידע על תאימות
RoHS compliant and lead-free per TI product data. Wettable-flank package options available for automotive-quality assembly. AEC-Q100 qualification status and REACH detail not stated in summarized data - consult TI product page.
