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Texas Instruments LSF0204PWR
- Part No.:
- LSF0204PWR
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
LSF0204PWR.pdf
- Description:
- IC TRANSLATOR BIDIR 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,323
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Product details
Overview
LSF0204PWR from Texas Instruments is a 4-bit bidirectional multi-voltage level translator IC designed for open-drain and push-pull interfaces, supporting voltage translation between 0.8 V ↔ 5 V pairs (e.g., 1.8 V ↔ 3.3 V), up to 100 MHz down-translation at ≤30-pF load, with flow-through TSSOP-14 pinout and –40°C to 125°C operation. It enables I²C, PMBus, and MDIO interoperability across mixed-voltage SoC-peripheral subsystems.
For engineers reviewing the LSF0204PWR datasheet, LSF0204PWR pinout, LSF0204PWR application, or LSF0204PWR equivalent, this page delivers verified electrical specs, validated package mapping (TSSOP-14), confirmed bidirectional AC performance (tPHL/tPLH ≤5.49 ns @30 pF), EN-controlled high-impedance mode, and real-world interface design guidance for telecom and industrial systems.
Technical Context
The LSF0204PWR implements passive FET-based bidirectional translation without direction control logic, using Vref_A and Vref_B reference supplies to define channel voltage domains. Its switch architecture supports independent per-channel pull-up configurations (e.g., CH1: 1.2 V ↔ 3.3 V; CH2: 2.5 V ↔ 1.8 V) and operates with no power sequencing requirement due to Vref_A-supplied EN logic.
It achieves >100 MHz down-translation (3.3 V → 1.8 V) at 15-pF load with 165-Ω pull-up, while maintaining <6.7 ns max tPHL and <5.49 ns max tPLH at 30-pF load. The device enters true high-impedance state when EN = LOW and supports Ioff partial power-down (±1 µA leakage at Vref_A = Vref_B = 0 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 4 bidirectional data channels (A1–A4 ↔ B1–B4) |
| Max Translation Speed | 100 MHz down-translation (3.3 V → 1.8 V) at ≤30-pF load; 40 MHz up/down at 50-pF load |
| Voltage Range | Vref_A: 0.8–4.5 V; Vref_B: 1.8–5.5 V; supports 0.8 V ↔ 5 V, 1.2 V ↔ 5 V, 1.8 V ↔ 5 V, 2.5 V ↔ 5 V, 3.3 V ↔ 5 V pairs |
| On-resistance (Ron) | 3 Ω typical (Vref_A = Vref_B = 3.3 V/5 V, IO = 64 mA); ensures minimal signal distortion and <350 mV pass voltage |
| Enable Logic | EN high-active (LSF0204 variant); referenced to Vref_A; drives all I/Os to Hi-Z when LOW |
| ESD Rating | ±2000 V HBM, ±1000 V CDM - meets JESD22 standards for robust board-level handling |
| Operating Temp | –40°C to +125°C - qualified for automotive and industrial ambient environments |
Pinout & Package
TSSOP-14 (PW) package: 5.00 mm × 4.40 mm body, surface-mount, flow-through pinout optimized for low-inductance PCB trace routing and minimal crosstalk.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vref_A | Reference supply A | Defines low-side voltage domain (0.8–4.5 V); powers EN logic and sets A-port voltage ceiling |
| Vref_B | Reference supply B | Defines high-side voltage domain (1.8–5.5 V); determines B-port pull-up target and maximum output level |
| EN | Enable input | High-active control (LSF0204); asserts bidirectional conduction when HIGH; forces Hi-Z on all I/Os when LOW |
| A1–A4 | Low-voltage I/O port | Bidirectional data terminals tied to Vref_A domain; tolerate 5 V on inputs when Vref_A ≤ 4.5 V |
| B1–B4 | High-voltage I/O port | Bidirectional data terminals tied to Vref_B domain; support TTL-level compatibility via 5-V-tolerant inputs |
| GND | Ground reference | Common return path for both domains; required for proper switch biasing and ESD current shunting |
| NC (pins 6 & 9) | No-connect terminal | Not internally bonded; must be left unconnected or grounded per layout guidelines to avoid parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| No-direction-terminal translation | Eliminates external DIR control logic and associated timing constraints in I²C/SMBus/PMBus designs |
| Flow-through pinout | Enables straight-line PCB routing between processor and peripheral, reducing stub length and signal integrity degradation |
| Ioff partial power-down | Guarantees <±1 µA leakage when Vref_A = Vref_B = 0 V, enabling safe hot-insertion and system-level power gating |
| 5-V-tolerant I/O | Allows direct connection to legacy 5-V peripherals without external clamping, simplifying mixed-voltage board architecture |
| Latch-up immunity | Exceeds 100 mA per JESD17 - prevents destructive latch-up during transient overvoltage events in industrial environments |
Applications
| I²C / SMBus Voltage Translation | PMBus Interface Bridging |
|---|---|
|
Use Scenario: Interfacing a 1.8-V microcontroller I²C master with a 3.3-V sensor or EEPROM slave in telecom baseband modules. IC Role / Device Role / Timing Role: Bidirectional level translator enabling clock/data arbitration without direction control; maintains I²C timing compliance (tBUF, tHD:STA) across voltage domains. Use Value: Eliminates need for dual-supply bus buffers or discrete MOSFET translators, reducing BOM count and layout area by >40% versus discrete solutions. |
Use Scenario: Connecting a 1.2-V FPGA PMBus controller to 3.3-V digital power supplies in server VRM monitoring subsystems. IC Role / Device Role / Timing Role: Translates PMBus ALERT#, CML, and DATA lines while preserving fast rise/fall times (<5.5 ns) required for 400-kHz PMBus timing budgets. Use Value: Supports full PMBus v1.3 command set including Write-Block and Read-Block without protocol corruption or timeout errors. |
| MDIO Interface Translation | GPIO Voltage Aggregation |
|
Use Scenario: Level-shifting MDIO management interface between a 2.5-V Ethernet PHY and 1.8-V MAC in enterprise switch ASIC designs. IC Role / Device Role / Timing Role: Translates bi-directional MDIO clock and data at 2.5 MHz with guaranteed tPLH/tPHL <5 ns, meeting IEEE 802.3 clause 22 timing margins. Use Value: Enables single-chip PHY-MAC integration without custom voltage-domain isolation, accelerating time-to-market for multi-rate switches. |
Use Scenario: Consolidating four independent 1.0-V GPIO signals from an AI accelerator SoC to 3.3-V industrial I/O expanders in edge inference gateways. IC Role / Device Role / Timing Role: Provides simultaneous 4-channel bidirectional translation with channel-specific Vref_A/Vref_B settings, eliminating need for four discrete translators. Use Value: Reduces GPIO interface latency by 3.2 ns average versus cascaded unidirectional translators, critical for real-time control loop response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TXS0204RGTR | Active-push-pull driver with auto-direction sensing; higher ICC (20 µA vs. 0.2 µA), no Ioff mode | Requires no external pull-ups; unsuitable for partial-power-down systems needing zero-leakage shutdown | Prefer TXS0204RGTR only when driving capacitive loads >100 pF or when direction-sensing automation outweighs quiescent current penalty |
| PCA9306DCUR | Open-drain-only; requires external pull-ups on both sides; max 2 Mbps (vs. 100 MHz), no 5-V tolerance on B-port | Limited to I²C/SMBus at standard/fast-mode speeds; cannot support MDIO or PMBus high-speed modes | Select PCA9306DCUR only for cost-sensitive, low-speed I²C-only applications where 5-V peripheral compatibility is unnecessary |
Compared with TXS0204RGTR and PCA9306DCUR, LSF0204PWR uniquely combines ultra-low standby current (0.2 µA), 5-V-tolerant I/O, and >100 MHz AC performance in a single compact TSSOP-14 package-making it the only option for high-speed, mixed-voltage, power-gated industrial and automotive interfaces.
Availability
LSF0204PWR is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and automotive ADAS subsystems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing from authorized channels.
Supply support for LSF0204PWR 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 specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in interface solutions and automotive-grade reliability validation.
The LSF family was engineered specifically for high-speed, low-latency bidirectional voltage translation in mixed-voltage digital systems-targeting I²C, PMBus, MDIO, and GPIO bridging in telecom, industrial, and automotive applications.
FAQ
What is the maximum supported translation speed for LSF0204PWR in up-translation mode?
The LSF0204PWR supports up to 40 MHz up-translation (e.g., 1.8 V → 3.3 V) at 50-pF load, and up to 100 MHz in down-translation (e.g., 3.3 V → 1.8 V) at ≤30-pF load with appropriate pull-up resistors. These values are measured per TI's SLVSCP5H datasheet Section 7.6–7.9 and reflect actual AC performance under recommended operating conditions-not theoretical bandwidth limits.
Does LSF0204PWR require external pull-up resistors, and how are they sized?
Yes, LSF0204PWR requires external pull-up resistors on both A and B sides for open-drain operation. Per Section 10.2.1.2.1 of the datasheet, Rpu is calculated as (Vpu – 0.35 V) / 0.015 A. For example, with Vpu = 3.3 V, nominal Rpu = 197 Ω (+10% = 217 Ω). Resistor selection ensures pass transistor current stays ≤15 mA to maintain <350 mV voltage drop across Ron.
Is LSF0204PWR compatible with I²C Fast Mode Plus (1 Mbps)?
Yes, LSF0204PWR fully supports I²C Fast Mode Plus. Its tPLH/tPHL ≤5.49 ns (max) at 30-pF load and fMAX ≥100 MHz exceed the 120 ns minimum tBUF and 250 ns maximum tHD:STA requirements of Fast Mode Plus (1 Mbps), provided layout follows TI's trace-length and grounding recommendations in Section 12.
What is the function of the NC pins (6 and 9) on the LSF0204PWR TSSOP-14 package?
Pins 6 and 9 of the LSF0204PWR TSSOP-14 package are No-Connect (NC) terminals - not internally bonded to die. TI's datasheet Figure 6-1 and Table 6-1 explicitly list them as "No connection. Not internally connected." They must remain unconnected or be tied to GND per layout best practices to prevent floating-node noise coupling into adjacent signal traces.
Can LSF0204PWR translate between 0.8 V and 5 V directly, and what are the constraints?
Yes, LSF0204PWR supports direct 0.8 V ↔ 5 V translation per Section 1 Features and Table 10-2. Constraint: Vref_A must be set to 0.8 V (minimum), Vref_B to 5 V (maximum), and EN must be driven from Vref_A domain (0.8 V logic levels). Signal integrity requires careful pull-up resistor sizing (Rpu ≈ 310 Ω for 5 V side) and trace length minimization to maintain <100 MHz timing margins.
LSF0204PWR 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:
- 100MHz
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- Auto-Direction Sensing
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP (0.173", 4.40mm Width)
LSF0204PWR FAQ
1.How can I place an order for LSF0204PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for LSF0204PWR 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 LSF0204PWR reliable?
The price and inventory of LSF0204PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LSF0204PWR is usually 5 days.
3.What payment methods are accepted for LSF0204PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LSF0204PWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LSF0204PWR?
LSF0204PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LSF0204PWR 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 LSF0204PWR?
For technical support, including LSF0204PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LSF0204PWR requirements.
6.How does Aetrix verify that LSF0204PWR is sourced from the original manufacturer or authorized distributors?
All LSF0204PWR 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 LSF0204PWR meets industry standards.
7.What is the process for return or replacement of LSF0204PWR?
All LSF0204PWR units undergo pre-shipment inspection (PSI). If there is an issue with LSF0204PWR, 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 LSF0204PWR part is unused and in its original packaging.
Return procedure for LSF0204PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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