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Texas Instruments LSF0204QPWRQ1
- Part No.:
- LSF0204QPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
LSF0204QPWRQ1.pdf
- Description:
- IC TRANSLATOR BIDIR 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,240
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Product details
Overview
LSF0204QPWRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified 4-channel auto-bidirectional voltage level translator supporting 0.95 V ↔ 1.8/2.5/3.3/5.5 V and 1.2 V ↔ 1.8/2.5/3.3/5.5 V translation without direction control, with ≤5 Ω on-state resistance, 100-MHz down-translation capability at 30-pF load, and operation from –40°C to 125°C - deployed in ADAS front camera and infotainment head unit interfaces.
For engineers reviewing the LSF0204QPWRQ1 datasheet, LSF0204QPWRQ1 pinout, LSF0204QPWRQ1 application, or LSF0204QPWRQ1 equivalent, key selection criteria include bidirectional I²C/MDIO/SPI voltage translation across mismatched rails (e.g., 1.2 V ↔ 3.3 V), EN-controlled high-impedance disable state, 5-V-tolerant I/Os, flow-through TSSOP-14 layout compatibility, and automotive-grade ESD robustness (HBM ±2 kV, CDM ±1 kV).
Technical Context
The LSF0204QPWRQ1 implements a passive MOSFET-based switch architecture with dual reference supplies (Vref_A: 0.95–4.5 V; Vref_B: 1.8–5.5 V), enabling automatic bidirectional translation by sensing relative voltage levels at A/B ports - no direction pin required. Its EN input is referenced solely to Vref_A and controls all four channels simultaneously.
Each channel operates as an independent pass transistor with low Ron (3–9 Ω depending on rail combination and current), supporting both open-drain (I²C, SMBus) and push-pull (SPI, UART, GPIO) protocols. Translation speed is load-dependent: up to 100 MHz for down-translation (e.g., 3.3 V → 1.8 V) at ≤30-pF capacitance, and 40–50 MHz for up/down at 50-pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 4 independent bidirectional translation paths |
| Vref_A Range | 0.95 V to 4.5 V - sets low-side logic threshold and enables 1.2 V system interfacing |
| Vref_B Range | 1.8 V to 5.5 V - supports legacy 3.3 V/5 V peripherals and 5-V-tolerant I/Os |
| Max Translation Speed | 100 MHz down (3.3 V → 1.8 V, 30-pF), 50 MHz up/down (50-pF) - defines usable data rate for I²C fast-mode plus or MDIO |
| On-State Resistance | 3 Ω typical (3.3 V → 5 V, 64 mA) - ensures <350 mV pass voltage and preserves signal integrity |
| ESD Rating | HBM ±2000 V, CDM ±1000 V - meets AEC-Q100-002/-001 for automotive PCB handling |
| Operating Temp | –40°C to +125°C (Grade 1) - qualified for under-hood and display cluster environments |
Pinout & Package
TSSOP-14 package (5.00 mm × 4.40 mm), flow-through pinout optimized for minimal trace stubs and simplified PCB routing in high-speed interface layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF_A (Pin 1) | Low-side reference supply | Sets A-port logic thresholds; must be lowest voltage rail in multi-rail systems |
| A1–A4 (Pins 2–5) | Low-voltage I/O port | Bidirectional data path tied to Vref_A domain; 5-V tolerant |
| NC (Pins 6, 9) | No connection | Not internally bonded - leave unconnected and unstubbed |
| GND (Pin 7) | Power return | Common ground reference for both domains; critical for noise immunity |
| EN (Pin 8) | Enable control input | Active-high, Vref_A-referenced; disables all channels to Hi-Z when low |
| B1–B4 (Pins 10–13) | High-voltage I/O port | Bidirectional data path tied to Vref_B domain; 5-V tolerant |
| VREF_B (Pin 14) | High-side reference supply | Sets B-port logic thresholds; must exceed Vref_A by ≥0.8 V for reliable operation |
Key Features
| Feature | Design Value |
|---|---|
| Auto-bidirectional translation | Eliminates direction-control logic and timing constraints in I²C/MDIO bus arbitration |
| Channel-specific pull-up support | Enables mixed-voltage systems (e.g., [email protected] V, [email protected] V) using discrete Vpu resistors per channel |
| Ioff partial power-down | Places all I/Os in Hi-Z when either Vref_A or Vref_B = 0 V - prevents backfeeding during power sequencing |
| Flow-through pinout | Reduces PCB layer count and trace length asymmetry - critical for maintaining signal integrity at >40 MHz |
| 5-V-tolerant I/Os | Allows direct connection to 5-V peripherals without external clamping - simplifies BOM in legacy automotive modules |
Applications
| Infotainment Head Unit | ADAS Front Camera |
|---|---|
Use Scenario: Interfacing 1.2-V MIPI CSI-2 image sensor to 3.3-V SoC video processor over bidirectional control lines (I²C, GPIO). IC Role / Device Role / Timing Role: Voltage translator bridging sensor-side low-voltage domain and host-side higher-voltage domain with sub-5-ns propagation delay. Use Value: Enables direct integration without level-shifting ICs or discrete FETs - reduces BOM cost and board area while maintaining 100-MHz I²C timing margins. | Use Scenario: Translating MDIO/MDC signals between 1.8-V Ethernet PHY and 3.3-V vehicle network controller in front-facing ADAS camera module. IC Role / Device Role / Timing Role: Bidirectional Ethernet management interface translator with EN-controlled isolation during PHY reset sequences. Use Value: Guarantees glitch-free MDIO communication during hot-plug events and power cycling - validated per IEEE 802.3 clause 22 timing requirements. |
| Graphical Cluster | HEV Battery Management System |
Use Scenario: Connecting 1.8-V microcontroller GPIOs to 5-V display backlight driver and touch controller in digital instrument cluster. IC Role / Device Role / Timing Role: Multi-rail GPIO translator supporting simultaneous 1.8 V ↔ 3.3 V and 1.8 V ↔ 5 V translation per channel pair. Use Value: Eliminates need for multiple discrete translators - single LSF0204QPWRQ1 handles all cluster I/O voltage mismatches with AEC-Q100 reliability. | Use Scenario: Isolating 3.3-V battery monitor IC communication (SMBus/PMBus) from 5-V MCU domain in hybrid electric vehicle BMS. IC Role / Device Role / Timing Role: Fault-tolerant bidirectional power-management bus translator with 5-V I/O tolerance and latch-up immunity >100 mA. Use Value: Prevents damage from transients on 5-V bus while maintaining <50 ns SMBus timing compliance - critical for real-time cell voltage reporting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TXS0104EQPWRQ1 | Active-drive architecture with integrated 10-kΩ pull-ups; higher static current (20 µA vs. <1 µA); no Vref_B pin - fixed 5-V tolerance | Optimized for I²C-only, low-pin-count designs; lacks per-channel Vpu flexibility of LSF0204QPWRQ1 | Select when board space is constrained and only standard 1.8 V ↔ 3.3 V I²C translation is needed without custom pull-up tuning. |
| SN74AVC4T245QPWRQ1 | Direction-controlled (DIR pin required); higher drive strength (24 mA); supports 1.2 V ↔ 3.6 V but not 5-V-tolerant I/Os | Suitable for push-pull SPI/UART where direction is statically known; incompatible with open-drain buses like I²C without external logic. | Select when deterministic unidirectional high-speed data transfer (e.g., camera parallel interface) is required and direction control is available. |
Compared with TXS0104EQPWRQ1 and SN74AVC4T245QPWRQ1, the LSF0204QPWRQ1 uniquely delivers auto-bidirectional operation without DIR pin, per-channel Vpu configurability, and true 5-V I/O tolerance - making it the only option for mixed-rail, open-drain automotive interfaces requiring zero-gate-count integration.
Availability
LSF0204QPWRQ1 is available at Aetrix Electronics and suitable for ADAS front camera, infotainment head unit, and graphical cluster designs requiring stable component supply, automotive qualification, and long-term production continuity.
Supply support for LSF0204QPWRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions for automotive, industrial, and personal electronics markets.
The LSF0204QPWRQ1 belongs to TI's LSF family of auto-bidirectional level translators, designed specifically for AEC-Q100-compliant automotive subsystems requiring seamless interoperability between heterogeneous voltage domains in safety-critical interfaces.
FAQ
What voltage combinations does the LSF0204QPWRQ1 support for bidirectional translation?
The LSF0204QPWRQ1 supports bidirectional translation between 0.95 V ↔ 1.8/2.5/3.3/5.5 V, 1.2 V ↔ 1.8/2.5/3.3/5.5 V, 1.8 V ↔ 2.5/3.3/5.5 V, 2.5 V ↔ 3.3/5.5 V, and 3.3 V ↔ 5.5 V. These combinations are explicitly verified in the datasheet's Section 1 and Table 6-5. The LSF0204QPWRQ1 achieves this via dual-reference architecture (Vref_A and Vref_B) and requires Vref_B ≥ Vref_A + 0.8 V for reliable operation.
Does the LSF0204QPWRQ1 require external pull-up resistors, and how are they selected?
Yes, the LSF0204QPWRQ1 requires external pull-up resistors on both A and B sides to establish logic HIGH levels. Resistor values depend on Vpu, target current (≤15 mA recommended), and acceptable pass voltage (<350 mV). For example, with Vpu = 3.3 V, Rpu ≈ 197 Ω (nominal) or 217 Ω (+10% tolerance). Table 8-3 in the LSF0204QPWRQ1 datasheet provides exact values for 1.2 V to 5 V rails at 3/10/15 mA currents.
How does the EN pin function, and what supply must drive it?
The EN pin is active-high and referenced exclusively to Vref_A. When EN = HIGH (≥0.7×Vref_A), all four channels conduct bidirectionally; when EN = LOW (≤0.3×Vref_A), all I/Os enter high-impedance state. EN must be driven from the Vref_A domain - connecting it to Vref_B or GND directly violates the input voltage specification and may cause undefined behavior in the LSF0204QPWRQ1.
Can the LSF0204QPWRQ1 translate between 1.0 V and 3.3 V, and is this configuration automotive-qualified?
Yes, the LSF0204QPWRQ1 supports 1.0 V ↔ 3.3 V translation as part of its 0.95 V ↔ 1.8/2.5/3.3/5.5 V range, and this configuration is fully covered under its AEC-Q100 Grade 1 qualification (–40°C to +125°C). The device's Vref_A minimum of 0.95 V and Vref_B maximum of 5.5 V, combined with its tested 1.2 V ↔ 3.3 V performance, confirm functional validity at 1.0 V - validated in production test conditions per TI's automotive release protocol for the LSF0204QPWRQ1.
What is the maximum capacitive load the LSF0204QPWRQ1 can drive at 100-MHz translation speed?
The LSF0204QPWRQ1 achieves 100-MHz translation speed only with ≤30-pF total capacitive load (including PCB trace, probe, and device pin capacitance), as specified in Sections 6.6 and 6.7 of the datasheet for down-translation (e.g., 3.3 V → 1.8 V). At 50-pF load, maximum speed drops to 40–50 MHz. Exceeding 30 pF degrades edge rates and increases propagation delay beyond guaranteed limits in the LSF0204QPWRQ1 AC specifications.
LSF0204QPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 4
- Voltage - VCCA:
- 0.8 V ~ 4.5 V
- Voltage - VCCB:
- 1.8 V ~ 5.5 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Open Drain, Push-Pull
- Data Rate:
- 100MBd
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Features:
- Auto-Direction Sensing
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP (0.173", 4.40mm Width)
LSF0204QPWRQ1 FAQ
1.How can I place an order for LSF0204QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LSF0204QPWRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LSF0204QPWRQ1 reliable?
The price and inventory of LSF0204QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LSF0204QPWRQ1 is usually 5 days.
3.What payment methods are accepted for LSF0204QPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LSF0204QPWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LSF0204QPWRQ1?
LSF0204QPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LSF0204QPWRQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LSF0204QPWRQ1?
For technical support, including LSF0204QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LSF0204QPWRQ1 requirements.
6.How does Aetrix verify that LSF0204QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All LSF0204QPWRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LSF0204QPWRQ1 meets industry standards.
7.What is the process for return or replacement of LSF0204QPWRQ1?
All LSF0204QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LSF0204QPWRQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LSF0204QPWRQ1 part is unused and in its original packaging.
Return procedure for LSF0204QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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