Product Folder Sample & Buy Support & Community Tools & Software Technical Documents LSF0204, LSF0204D SLVSCP5C – JULY 2014 – REVISED AUGUST 2015 LSF0204x 4-Bits Bidirectional Multi-Voltage Level Translator for Open-Drain and PushPull Application 1 Features 3 Description • The LSF family are bidirectional voltage level translators that operate from 0.8 V to 4.5 V (Vref_A) and 1.8 V to 5.5 V (Vref_B). This allows bidirectional voltage translations between 0.8 V and 5.0 V without the need for a direction terminal in open-drain or push-pull applications. LSF family supports level translation applications with transmission speeds greater than 100 MHz for open-drain systems utilizing a 15-pF capacitance and 165-Ω pull-up resistor. 1 • • • • • • • • • • • Provides Bidirectional Voltage Translation With No Direction Terminal Supports up to 100-MHz up Translation and Greater Than 100-MHz Down Translation at ≤ 30-pF Cap Load and up to 40-MHz Up/Down Translation at 50-pF Cap Load Supports Ioff, Partial Power Down Mode (Refer to Feature Description) Allows Bidirectional Voltage Level Translation Between – 0.8 V ↔ 1.8/2.5/3.3/5 V – 1.2 V ↔ 1.8/2.5/3.3/5 V – 1.8 V ↔ 2.5/3.3/5 V – 2.5 V ↔ 3.3/5 V – 3.3 V ↔ 5 V Low Standby Current 5 V Tolerance I/O Port to Support TTL Low Ron Provides Less Signal Distortion High-Impedance I/O Terminals For EN = Low Flow-Through Pinout for Ease PCB Trace Routing Latch-Up Performance Exceeds 100 mA Per JESD17 –40°C to 125°C Operating Temperature Range ESD Performance Tested Per JESD 22 – 2000-V Human-Body Model (A114-B, Class II) – 200-V Machine Model (A115-A) – 1000-V Charged-Device Model (C101) When the An or Bn port is LOW, the switch is in the ON-state and a low resistance connection exists between the An and Bn ports. The low Ron of the switch allows connections to be made with minimal propagation delay and signal distortion. The voltage on the A or B side will be limited to Vref_A and can be pulled up to any level between Vref_A and 5 V. This functionality allows a seamless translation between higher and lower voltages selected by the user without the need for directional control. Device Information(1) PART NUMBER LSF0204x • • • BODY SIZE (NOM) 5.00 mm × 4.40 mm UQFN (12) 2.00 mm × 1.70 mm VQFN (14) 3.50 mm × 3.50 mm DSBGA (12) 1.90 mm × 1.40 mm (1) For all available packages, see the orderable addendum at the end of the datasheet. Simplified Schematic Vref_B Vref_A 2 Applications • PACKAGE TSSOP (14) LSF0204 EN 2 GPIO, MDIO, PMBus, SMBus, SDIO, UART, I C, and Other Interfaces in Telecom Infrastructure Industrial Automotive Personal Computing A1 SW B1 A2 SW B2 A3 SW B3 A4 SW B4 GND 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. LSF0204, LSF0204D SLVSCP5C – JULY 2014 – REVISED AUGUST 2015 www.ti.com Table of Contents 1 2 3 4 5 6 7 8 Features .................................................................. Applications ........................................................... Description ............................................................. Revision History..................................................... Description (Continued) ........................................ Device Comparison Table..................................... Pin Configuration and Functions ......................... Specifications......................................................... 1 1 1 2 3 3 3 4 8.1 8.2 8.3 8.4 8.5 8.6 4 4 4 4 5 12 Power Supply Recommendations ..................... 17 13 Layout................................................................... 17 5 14 Device and Documentation Support ................. 19 Absolute Maximum Ratings ...................................... ESD Ratings.............................................................. Recommended Operating Conditions....................... Thermal Information ................................................. Electrical Characteristics........................................... Switching Characteristics: AC Performance (Translating Down, 3.3 V to 1.8 V) ........................... 8.7 Switching Characteristics: AC Performance (Translating Down, 3.3 V to 1.2 V) ........................... 8.8 Switching Characteristics: AC Performance (Translating Up, 1.8 V to 3.3 V) ................................ 8.9 Switching Characteristics: AC Performance (Translating Up, 1.2 V to 1.8 V) ................................ 8.10 Typical Characteristics ............................................ 6 6 6 6 9 Parameter Measurement Information .................. 7 9.1 Load Circuit AC Waveform for Outputs .................... 8 10 Detailed Description ............................................. 9 10.1 10.2 10.3 10.4 Overview ................................................................. 9 Functional Block Diagram ....................................... 9 Feature Description............................................... 10 Device Functional Modes...................................... 10 11 Application and Implementation........................ 11 11.1 Application Information.......................................... 11 11.2 I2C PMBus, SMBus, GPIO, Application................ 11 13.1 Layout Guidelines ................................................. 17 13.2 Layout Example .................................................... 17 14.1 14.2 14.3 14.4 Related Links ........................................................ Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 19 19 19 19 15 Mechanical, Packaging, and Orderable Information ........................................................... 19 4 Revision History Changes from Revision April 2015 (B) to Revision C Page • Removed "Less than 1.5 ns max propagation delay" from Features. .................................................................................... 1 • Updated "Supports High Speed Translation, Greater Than 100 MHz" bullet in Features. .................................................... 1 Changes from Revision A (December 2014) to Revision B • Page Added YZP package to device. ............................................................................................................................................. 1 Changes from Original (November 2014) to Revision A Page • Changed From a first page Product Preview To a full datasheet ......................................................................................... 1 • Changed text in the Description From: "transmission speeds greater than 100 Mbps" To: "transmission speeds greater than 100 MHz" .......................................................................................................................................................... 1 2 Submit Documentation Feedback Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: LSF0204 LSF0204D LSF0204, LSF0204D www.ti.com SLVSCP5C – JULY 2014 – REVISED AUGUST 2015 5 Description (Continued) The supply voltage (Vpu#) for each channel can be individually set up with a pull up resistor. For example, CH1 can be used in up-translation mode (1.2 V ↔ 3.3 V) and CH2 in down-translation mode (2.5 V ↔ 1.8 V). When EN is HIGH, the translator switch is on, and the An I/O is connected to the Bn I/O, respectively, allowing bidirectional data flow between ports. When EN is LOW, the translator switch is off, and a high-impedance state exists between ports. The EN input circuit is designed to be supplied by Vref_A. To ensure the high-impedance state during power-up or power-down, EN must be LOW. 6 Device Comparison Table PART NUMBER EN An Bn DESCRIPTION LSF0204D H Place all data pins in 3 state mode (Hi-Z) Place all data pins in 3 state mode (Hi-Z) LSF0204D L Input or output Input or output LSF0204 H Input or output Input or output L Place all data pins in 3 state mode (Hi-Z) Place all data pins in 3 state mode (Hi-Z) LSF0204 3-state output mode enable (active Low; referenced to Vref_A) 3-state output mode enable (active High, referenced to Vref_A) 7 Pin Configuration and Functions YZP Package (TOP VIEW) PW Package (TOP VIEW) 3 2 1 Vref_A 1 14 Vref_B 13 B1 A1 2 12 B2 A2 3 EN Vref_A D C B A RGY Package (TOP VIEW) RUT Package (TOP VIEW) 1 12 11 Vref_B B1 A1 2 10 A2 A3 A4 3 9 B2 A1 4 8 B3 B4 Vref_A Vref_B 1 14 2 13 B1 A2 3 12 A3 4 11 B2 B3 A3 4 11 B3 A4 5 10 B4 NC 6 9 NC A4 5 10 B4 GND 7 8 EN NC 6 9 NC 5 6 7 GND 7 8 GND EN Pin Functions PIN NAME NO. FUNCTION PW, RGY RUT YZP Vref_A 1 1 B2 Reference supply voltage; see Application and Implementation section A1 2 2 A3 Input/output 1. A2 3 3 B3 Input/output 2. A3 4 4 C3 Input/output 3. A4 5 5 D3 Input/output 4. NC 6 – – GND 7 6 D2 Ground EN 8 12 C2 Switch enable input; LSF0204: EN is high-active; LSF0204D: EN is lowactive NC 9 – – B4 10 7 D1 Input/output 4. B3 11 8 C1 Input/output 3. B2 12 9 B1 Input/output 2. B1 13 10 A1 Input/output 1. Vref_B 14 11 A2 Reference supply voltage; see Application and Implementation section No connection. Not internally connected. No connection. Not internally connected. Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: LSF0204 LSF0204D Submit Documentation Feedback 3 LSF0204, LSF0204D SLVSCP5C – JULY 2014 – REVISED AUGUST 2015 www.ti.com 8 Specifications 8.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) (1) MIN Input voltage range (2) VI VI/O Input/output voltage range MAX –0.5 (2) –0.5 7 Continuous channel current IIK Input clamp current Tstg Storage temperature range (1) (2) UNIT 7 VI < 0 –65 V V 128 mA –50 mA 150 °C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. The input and input/output negative-voltage ratings may be exceeded if the input and input/output clamp-current ratings are observed. 8.2 ESD Ratings VALUE V(ESD) (1) (2) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1) ±2000 Charged-device model (CDM), per JEDEC specification JESD22C101 (2) ±1000 UNIT V JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. Manufacturing with less than 500-V HBM is possible with the necessary precautions. JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. Manufacturing with less than 250-V CDM is possible with the necessary precautions. 8.3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) MIN MAX VI/O Input/output voltage 0 5 Vref_A/B/EN Reference voltage 0 IPASS Pass transistor current TA Operating free-air temperature –40 UNIT V 5 V 64 mA 125 °C 8.4 Thermal Information LSF0204 THERMAL METRIC (1) RGY VQFN RUT UQFN PW TSSOP UNIT 14 PINS 12 PINS 14 PINS RθJA Junction-to-ambient thermal resistance 83.2 195.8 157.9 °C RθJC(top) Junction-to-case (top) thermal resistance 98.2 98.7 82.3 °C RθJB Junction-to-board thermal resistance 59.2 122.6 100.0 °C ψJT Junction-to-top characterization parameter 17.4 6.2 22.9 °C ψJB Junction-to-board characterization parameter 59.4 122.6 99.0 °C RθJC(bot) Junction-to-case (bottom) thermal resistance 38.7 N/A N/A °C (1) 4 For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953. Submit Documentation Feedback Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: LSF0204 LSF0204D LSF0204, LSF0204D www.ti.com SLVSCP5C – JULY 2014 – REVISED AUGUST 2015 8.5 Electrical Characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP (1) MAX UNIT VIK II = -18 mA, VEN = 0 –1.2 V IIH VI = 5 V VEN = 0 5.0 µA ICCBA Leakage from Vref_B to Vref_A Vref_B = 3.3 V, Vref_A = 1.8 V, VEN = Vref_A IO = 0, VI = 3.3 V or GND 3.5 µA ICCA + ICCB (2) Total Current through GND Vref_B = 3.3 V, Vref_A = 1.8 V, VEN = Vref_A IO = 0, VI = 3.3 V or GND IIN Control pin current Vref_B = 5.5 V, Vref_A = 4.5 V, VEN = 0 to Vref_A IO = 0 ±1 µA Ioff Power Off Leakage Current Vref_B = Vref_A = 0 V, VEN = GND IO = 0, VI = 5 V or GND ±1 µA CI(ref_A/B/EN) VI = 3 V or 0 Cio(off) VO = 3 V or 0, VEN = 0 Cio(on) VO = 3 V or 0, VEN = Vref_A VIH (EN pin) High-level input voltage (3) Vref_A = 1.5 V to 4.5 V VIL (EN pin) Low-level input voltage Vref_A = 1.5 V to 4.5 V VIH (EN pin) High-level input voltage Vref_A= 1.0 V to 1.5 V VIL (EN pin) Low-level input voltage Vref_A = 1.0 V to 1.5 V ∆t/∆v (EN pin) Input transition rise or fall rate for EN pin ron (1) (2) (3) (4) (4) 0.2 µA 7 pF 5.0 6.0 pF 10.5 13 pF 0.7×Vref_A V 0.3×Vref_A V 0.8×Vref_A V 0.3×Vref_A V 10 ns/V Vref_A = VEN = 3.3 V; Vref_B = 5 V 3 Vref_A = VEN = 1.8 V; Vref_B = 5 V 4 Vref_A = VEN = 1.0 V; Vref_B = 5 V 9 Vref_A = VEN = 1.8 V; Vref_B = 5 V 4 IO = 32 mA Vref_A = VEN = 2.5 V; Vref_B = 5 V 10 Ω IO = 15 mA Vref_A = VEN = 3.3 V; Vref_B = 5 V 5 Ω VI = 1.0 V, IO = 10 mA Vref_A = VEN = 1.8 V; Vref_B = 3.3 V 8 Ω VI = 0 V, IO = 10 mA Vref_A = VEN = 1.0 V; Vref_B = 3.3 V 6 Ω VI = 0 V, IO = 10 mA Vref_A = VEN = 1.0 V; Vref_B = 1.8 V 6 Ω VI = 0, IO = 64 mA VI = 0, IO = 32 mA VI = 0, VI = 1.8 V, Ω Ω All typical values are at TA = 25°C. The actual supply current for LSF0204 is ICCA + ICCB; the leakage from Vref_B to Vref_A can be measured on Vref_A and Vref_B pin Enable pin test conditions are for the LSF0204. The enable pin test conditions for LSF0204D are oppositely set. Measured by the voltage drop between the A and B terminals at the indicated current through the switch. On-state resistance is determined by the lowest voltage of the two (A or B) terminals. 8.6 Switching Characteristics: AC Performance (Translating Down, 3.3 V to 1.8 V) over recommended operating free-air temperature range, Vrev-A = 1.8 V, Vrev-B = 3.3 V, VEN = 1.8 V, Vpu_1 = 3.3 V, Vpu_2 = 1.8 V, RL = NA, VIH = 3.3 V, VIL = 0 VM = 1.15 V (unless otherwise noted) PARAMETER FROM (INPUT) TO (OUTPUT) CL = 50 pF CL = 30 pF CL = 15 pF UNIT TYP MAX TYP MAX TYP MAX 0.7 5.49 0.5 5.29 0.3 5.19 ns 0.9 4.9 0.7 4.7 0.5 4.5 ns 13 18 12 16.5 11 15 ns tPZL 33 45 30 40 23 37 fMAX 50 tPLH tPHL tPLZ A or B B or A 100 Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: LSF0204 LSF0204D 100 ns MHz Submit Documentation Feedback 5 LSF0204, LSF0204D SLVSCP5C – JULY 2014 – REVISED AUGUST 2015 www.ti.com 8.7 Switching Characteristics: AC Performance (Translating Down, 3.3 V to 1.2 V) over recommended operating free-air temperature range Vrev-A = 1.2 V, Vrev-B = 3.3 V, VEN = 1.2 V, Vpu_1 = 3.3 V, Vpu_2 = 1.2 V, RL = NA, VIH = 3.3V, VIL = 0 VM = 0.85 V (unless otherwise noted) PARAMETER FROM (INPUT) TO (OUTPUT) A or B B or A CL = 50 pF tPLH tPHL fMAX CL = 30 pF CL = 15 pF TYP MAX TYP MAX TYP MAX 0.8 4.1 0.5 3.9 0.3 3.8 0.9 4.7 0.7 4.5 0.6 4.3 50 100 100 UNIT ns ns MHz 8.8 Switching Characteristics: AC Performance (Translating Up, 1.8 V to 3.3 V) over recommended operating free-air temperature range Vrev-A = 1.8 V, Vrev-B = 3.3 V, VEN = 1.8 V, Vpu_1 = 3.3 V, Vpu_2 = 1.8V, RL = 500 Ω, VIH = 1.8V, VIL = 0 VM = 0.9V (unless otherwise noted) PARAMETER FROM (INPUT) TO (OUTPUT) CL = 50 pF CL = 30 pF CL = 15 pF UNIT TYP MAX TYP MAX TYP MAX tPLH 0.6 5.7 0.4 5.3 0.2 5.13 ns tPHL 1.3 6.7 1 6.4 0.7 5.3 ns 13 18 12 16.5 11 15 ns tPZL 33 45 30 40 23 37 ns fMAX 50 tPLZ A or B B or A 100 100 MHz 8.9 Switching Characteristics: AC Performance (Translating Up, 1.2 V to 1.8 V) over recommended operating free-air temperature range, Vrev-A = 1.2 V, Vrev-B = 1.8 V, VEN = 1.2 V, Vpu_1 = 1.8 V, Vpu_2 = 1.2 V, RL = 500 Ω, VIH = 1.2V, VIL = 0 VM = 0.6 V (unless otherwise noted) PARAMETER FROM (INPUT) TO (OUTPUT) A or B B or A CL = 50 pF tPLH tPHL fMAX CL = 30 pF CL = 15 pF UNIT TYP MAX TYP MAX TYP MAX 0.65 7.25 0.4 7.05 0.2 6.85 ns 1.6 7.03 1.3 6.5 1 5.4 ns 50 100 100 MHz 8.10 Typical Characteristics 4 Input Output 3.5 3 Voltage (V) 2.5 2 1.5 1 0.5 0 -0.5 0 5 10 Time (ns) 15 20 Figure 1. Signal Integrity (1.8 V to 3.3 V Translation Up at 50 MHz) 6 Submit Documentation Feedback Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: LSF0204 LSF0204D LSF0204, LSF0204D www.ti.com SLVSCP5C – JULY 2014 – REVISED AUGUST 2015 9 Parameter Measurement Information VT RL USAGE SWITCH Translating up Translating down S1 S2 S1 Open From Output Under Test S2 3.3 V Input VM VM VIL CL (see Note A) 5V Output VM VM LOAD CIRCUIT VOL TRANSLATING UP 5V Input VM VM VIL 2V Output VM VM VOL TRANSLATING DOWN NOTES: A. CL includes probe and jig capacitance. B. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2 ns, tf ≤ 2 ns. C. The outputs are measured one at a time, with one transition per measurement. Figure 2. Load Circuit for Outputs Vref_B S1 500 Ω Open From Output Under Test 15 pF TEST S1 tPZL/tPLZ Vref_B Figure 3. Load Circuit for Enable/Disable Time Measurement Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: LSF0204 LSF0204D Submit Documentation Feedback 7 LSF0204, LSF0204D SLVSCP5C – JULY 2014 – REVISED AUGUST 2015 www.ti.com 9.1 Load Circuit AC Waveform for Outputs tr 2.0 ns tf 2.0 ns VCCA 90% Input (An, Bn) 50% 10% GND VOH Output (Bn, An) VOL tpLH tpHL Figure 4. tPLH, tPHL tr 2.0 ns tf 2.0 ns VCCA 90% Output Enabled Control OE, OE 50% 10% GND tpLZ tpZL VOH Output (An or Bn) Low to off to Low 50% 10% Outputs enabled Outputs disabled Outputs enabled Figure 5. tPLZ, tPZL 8 Submit Documentation Feedback Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: LSF0204 LSF0204D LSF0204, LSF0204D www.ti.com SLVSCP5C – JULY 2014 – REVISED AUGUST 2015 10 Detailed Description 10.1 Overview The LSF Family can be used in level translation applications for interfacing devices or systems operating at different interface voltages with one another. The LSF Family is ideal for use in applications where an open-drain driver is connected to the data I/Os. With appropriate pull-up resistors and layout, LSF can achieve 100 MHz. The LSF Family can also be used in applications where a push-pull driver is connected to the data I/Os. 10.2 Functional Block Diagram LSF0204 200 KΩ Vref_B Vref_A Level Converter EN A1 B1 A2 B2 A3 B3 A4 B4 Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: LSF0204 LSF0204D Submit Documentation Feedback 9 LSF0204, LSF0204D SLVSCP5C – JULY 2014 – REVISED AUGUST 2015 www.ti.com 10.3 Feature Description 10.3.1 Support High Speed Translation, Greater than 100 MHz Allows the LSF family to support more consumer or telecom interfaces (MDIO or SDIO). 10.3.2 Bidirectional Voltage Translation Without DIR Terminal Minimizes system effort to develop voltage translation for bidirectional interface (PMBus, I2C, or SMbus). 10.3.3 5V Tolerance on IO Port and 125°C Support With 5 V tolerance and 125°C support, the LSF family is flexible and compliant with TTL levels in industrial and telecom applications. 10.3.4 Channel Specific Translation The LSF family is able to set up different voltage translation levels on each channel. 10.3.5 Ioff, Partial Power Down Mode When Vref_A, Vref_B = 0, all of data pins and EN pin are Hi-Z. Since EN logic circuit is supplied by Vref_A, once Vref_A power up first, all of data pins are unknown state until Vref_B and EN ready. No power sequence requirement to enable LSF0204 and operate function normally. 10.4 Device Functional Modes Function Table (1) 10 INPUT EN (1) TERMINAL FUNCTION H An = Bn L Hi-Z EN is controlled by Vref_A logic levels. Submit Documentation Feedback Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: LSF0204 LSF0204D LSF0204, LSF0204D www.ti.com SLVSCP5C – JULY 2014 – REVISED AUGUST 2015 11 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 11.1 Application Information LSF is able to perform voltage translation for open-drain or push-pull interface. Table 1 provides some consumer/telecom interfaces as reference in regards to the different channel numbers that are supported by the LSF family. Table 1. Voltage Translator for Consumer/Telecom Interface PART NAME CH# INTERFACE LSF0101 1 GPIO LSF0102 2 GPIO, MDIO, SMBus, PMBus, I2C LSF0204 4 SPI. MDIO, SMBus, PMBus, I2C, UART, SVID LSF0108 8 GPIO, MDIO, SDIO, SVID, UART, SMBus, PMBus, I2C, SPI 11.2 I2C PMBus, SMBus, GPIO, Application Vpu_1 = 3.3 V Vpu_2 = 1.8 V Vrev_A = 1.8 V Vrev_B = 3.3 V 1.8 V enable signal ON LSF0204 Rpu SDA A2 SCL A3 A4 Rpu Rpu EN Rpu A1 Vcc Off SW SW SW SW B1 B2 Vcc SDA SCL B3 B4 GND Figure 6. Bidirectional Translation to Multiple Voltage Levels 11.2.1 Design Requirements 11.2.1.1 Enable, Disable, and Reference Voltage Guidelines The LSF family has an EN input that is used to disable the device by setting EN LOW, which places all I/Os in the high-impedance state. Since LSF family is switch-type voltage translator, the power consumption is very low. It is recommended to always enable LSF family for bidirectional application (I2C, SMBus, PMBus, or MDIO). Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: LSF0204 LSF0204D Submit Documentation Feedback 11 LSF0204, LSF0204D SLVSCP5C – JULY 2014 – REVISED AUGUST 2015 www.ti.com I2C PMBus, SMBus, GPIO, Application (continued) Table 2. Application Operating Condition SYMBOL PARAMETER MIN MAX UNIT Vref_A Reference voltage (A) 0.8 4.5 V Vref_B Reference voltage (B) Vref_A + 0.8 5.5 V Input voltage on EN terminal 0 Vref_A V Pull-up supply voltage 0 Vref_B V VI(EN) (1) Vpu (1) TYP Refer VIH and VIL for VI(EN) Also Vref_B is recommended to be at 1.0 V higher than Vref_A for best signal integrity. LSF Family is able to set different voltage translation level on each channel NOTE Vref_A must be set as lowest voltage level. 11.2.2 Detailed Design Procedure 11.2.2.1 Bidirectional Translation The master output driver can be push-pull or open-drain (pull-up resistors may be required) and the slave device output can be push-pull or open-drain (pull-up resistors are required to pull the Bn outputs to Vpu). However, if either output is push-pull, data must be unidirectional or the outputs must be 3-state and be controlled by some direction-control mechanism to prevent HIGH-to-LOW contentions in either direction. If both outputs are open-drain, no direction control is needed. In Figure 6, the reference supply voltage (Vref_A) is connected to the processor core power supply voltage. When Vref_B is connected through to a 3.3 V Vpu power supply, and Vref_A is set 1.0V. The output of A3 and B4 has a maximum output voltage equal to Vref_A, and the bidirectional interface (Ch1/2, MDIO) has a maximum output voltage equal to Vpu. 11.2.2.1.1 Pull-up Resistor Sizing The pull-up resistor value needs to limit the current through the pass transistor when it is in the ON state to about 15 mA. This ensures a pass voltage of 260 mV to 350 mV. If the current through the pass transistor is higher than 15 mA, the pass voltage also is higher in the ON state. To set the current through each pass transistor at 15 mA, to calculate the pull-up resistor value use Equation 1. Rpu = (Vpu – 0.35 V) / 0.015 A (1) Table 3 summarizes resistor values, reference voltages, and currents at 15 mA, 10 mA, and 3 mA. The resistor value shown in the +10% column (or a larger value) should be used to ensure that the pass voltage of the transistor is 350 mV or less. The external driver must be able to sink the total current from the resistors on both sides of the LSF family device at 0.175 V, although the 15 mA applies only to current flowing through the LSF family device. 12 Submit Documentation Feedback Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: LSF0204 LSF0204D LSF0204, LSF0204D www.ti.com SLVSCP5C – JULY 2014 – REVISED AUGUST 2015 Table 3. Pull-up Resistor Values (1) (2) PULL-UP RESISTOR VALUE (Ω) VDPU (1) (2) (3) 15 mA 10 mA NOMINAL +10% (3) 3 mA NOMINAL +10% (3) NOMINAL +10% (3) 5V 310 341 465 512 1550 1705 3.3 V 197 217 295 325 983 1082 2.5 V 143 158 215 237 717 788 1.8 V 97 106 145 160 483 532 1.5 V 77 85 115 127 383 422 1.2 V 57 63 85 94 283 312 Calculated for VOL = 0.35 V Assumes output driver VOL = 0.175 V at stated current +10% to compensate for VDD range and resistor tolerance 11.2.2.2 LS Family Bandwidth The maximum frequency of the LSF family is dependent on the application. The device can operate at speeds of >100MHz gave the correct conditions. The maximum frequency is dependent upon the loading of the application. The LSF family behaves like a standard switch where the bandwidth of the device is dictated by the on resistance and on capacitance of the device. Figure 7 shows a bandwidth measurement of the LSF family using a two-port network analyzer. 0 –1 –2 Gain (dB) –3 –4 –5 –6 –7 –8 –9 0.1 1 10 100 Frequency (MHz) 1000 Figure 7. 3-dB Bandwidth The 3-dB point of the LSF family is ≈600MHz; however, this measurement is an analog type of measurement. For digital applications the signal should not degrade up to the fifth harmonic of the digital signal. The frequency bandwidth should be at least five times the maximum digital clock rate. This component of the signal is very important in determining the overall shape of the digital signal. In the case of the LSF family, a digital clock frequency of greater than 100 MHz can be achieved. The LSF family does not provide any drive capability. Therefore higher frequency applications will require higher drive strength from the host side. No pull-up resistor is needed on the host side (3.3 V) if the LSF family is being driven by standard CMOS totem pole output driver. Ideally, it is best to minimize the trace length from the LSF family on the sink side (1.8 V) to minimize signal degradation. All fast edges have an infinite spectrum of frequency components; however, there is an inflection (or "knee") in the frequency spectrum of fast edges where frequency components higher than fknee are insignificant in determining the shape of the signal. Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: LSF0204 LSF0204D Submit Documentation Feedback 13 LSF0204, LSF0204D SLVSCP5C – JULY 2014 – REVISED AUGUST 2015 www.ti.com To calculate the maximum "practical" frequency component, or the "knee" frequency (fknee), use the following equations: fknee = 0.5/RT (10–80%) fknee = 0.4/RT (20–80%) (2) (3) For signals with rise time characteristics based on 10- to 90-percent thresholds, fknee is equal to 0.5 divided by the rise time of the signal. For signals with rise time characteristics based on 20% to 80% thresholds, which is very common in many of today's device specifications, fknee is equal to 0.4 divided by the rise time of the signal. Some guidelines to follow that will help maximize the performance of the device: • Keep trace length to a minimum by placing the LSF family close to the I2C output of the processor. • The trace length should be less than half the time of flight to reduce ringing and line reflections or nonmonotonic behavior in the switching region. • To reduce overshoots, a pull-up resistor can be added on the 1.8 V side; be aware that a slower fall time is to be expected. 11.2.3 Application Curve 4 Input Output Voltage (V) 3 2 1 0 ±1 0 50 100 150 200 250 300 350 Time (ns) 400 450 500 Figure 8. Captured Waveform From Above I2C Set-Up (1.8 V to 3.3 V at 2.5 MHz) 14 Submit Documentation Feedback Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: LSF0204 LSF0204D LSF0204, LSF0204D www.ti.com SLVSCP5C – JULY 2014 – REVISED AUGUST 2015 11.2.4 MDIO Application Vpu_1 = 3.3 V Vpu_2 = 1.0 V Vrev_A = 1.0 V Vrev_B = 3.3 V 1.0 V enable signal ON LSF0204 Rpu MDC A2 MDIO A3 A4 Rpu Rpu EN Rpu A1 Vcc Off SW SW SW SW B1 B2 Vcc MDC MDIO B3 B4 GND Figure 9. Typical Application Circuit (MDIO/Bidirectional Interface) 11.2.4.1 Design Requirements Refer to Design Requirements. 11.2.4.2 Detailed Design Procedure Refer to Detailed Design Procedure 11.2.4.3 Application Curve Input (3.3V) Output (1.0V) Figure 10. Captured Waveform From Above MDIO Setup Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: LSF0204 LSF0204D Submit Documentation Feedback 15 LSF0204, LSF0204D SLVSCP5C – JULY 2014 – REVISED AUGUST 2015 www.ti.com 11.2.5 Multiple Voltage Translation in Single Device, Application Vrev_A = 1.8 V Vrev_B = 3.3 V Vpu_1 = 3.3 V Vpu_2 = 1.8 V 1.8 V enable signal ON LSF0204 Rpu Rpu Off A1 Vcc Rpu A2 Vpu = 1.0 V MDIO Vcc GPIO B3 SW A4 MDC B2 SW A3 Vcc B1 SW MDC MDIO Rpu EN Rpu B4 SW GPIO GND 11.2.5.1 Design Requirements Refer to Design Requirements. 11.2.5.2 Detailed Design Procedure Refer to Detailed Design Procedure 11.2.5.3 Application Curves 3.5 Input Output 3 2.5 Voltage (V) 2 1.5 1 0.5 2.16E+1 1.92E+1 1.68E+1 1.44E+1 9.6E+0 7.2E+0 4.8E+0 0 2.4E+0 -0.5 1.2E+1 0 Time (ns) Figure 11. Translation Down (3.3 V to 1.8 V) at 150 MHz 16 Submit Documentation Feedback Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: LSF0204 LSF0204D LSF0204, LSF0204D www.ti.com SLVSCP5C – JULY 2014 – REVISED AUGUST 2015 12 Power Supply Recommendations There are no power sequence requirements for the LSF Family. For enable and reference voltage guidelines, refer to the Enable, Disable, and Reference Voltage Guidelines. 13 Layout 13.1 Layout Guidelines Since LSF Family is switch-type level translator, the signal integrity is highly related with pull-up resistor and PCB capacitance condition. • Short signal trace as possible to reduce capacitance and minimize stub from pull-up resistor. • Place LSF close to high voltage side. • Select the appropriate pull-up resistor that applies to translation levels and driving capability of transmitter. 13.2 Layout Example LSF0102 GND Vref_A A1 A2 1 2 3 4 8 7 6 5 EN Short Signal Trace as possible Vref_B B1 B2 Minimize Stub as possible Figure 12. Short Trace Layout TP1 SD Controller (1.8V IO) LSF0108 SDIO level translator SDIO Connector (3.3V IO) Device PCB TP2 Figure 13. Device Placement Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: LSF0204 LSF0204D Submit Documentation Feedback 17 LSF0204, LSF0204D SLVSCP5C – JULY 2014 – REVISED AUGUST 2015 www.ti.com Layout Example (continued) 2.5 2E+0 2 Figure 14. Waveform From TP1 (Pull-up Resistor: 160-Ω and 50-pF Capacitance 3.3 to 1.8 V at 100 MHz) Submit Documentation Feedback 3E+1 2.7E+1 Time (ns) Time (ns) 18 2.4E+1 0 2.1E+1 -0.5 1.8E+1 2.5E+1 2.25E+1 2E+1 7.5E+0 5E+0 0 2.5E+0 -5E-1 1.75E+1 0 1.5E+1 0 1.25E+1 0.5 1E+1 5E-1 1.5E+1 1 1.2E+1 1E+0 1.5 9E+0 Voltage (V) 2.5E+0 1.5E+0 Output Input 3 6E+0 3E+0 Voltage (V) 3.5 Intput Output 3E+0 3.5E+0 Figure 15. Waveform From TP2 (Pull-up Resistor: 160-Ω and 50-pF Capacitance 1.8 to 3.3 V at 100 MHz) Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: LSF0204 LSF0204D LSF0204, LSF0204D www.ti.com SLVSCP5C – JULY 2014 – REVISED AUGUST 2015 14 Device and Documentation Support 14.1 Related Links The table below lists quick access links. Categories include technical documents, support and community resources, tools and software, and quick access to sample or buy. Table 4. Related Links PARTS PRODUCT FOLDER SAMPLE & BUY TECHNICAL DOCUMENTS TOOLS & SOFTWARE SUPPORT & COMMUNITY LSF0204 Click here Click here Click here Click here Click here LSF0204D Click here Click here Click here Click here Click here 14.2 Trademarks All trademarks are the property of their respective owners. 14.3 Electrostatic Discharge Caution These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. 14.4 Glossary SLYZ022 — TI Glossary. This glossary lists and explains terms, acronyms, and definitions. 15 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation. Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: LSF0204 LSF0204D Submit Documentation Feedback 19 PACKAGE OPTION ADDENDUM www.ti.com 9-Jul-2015 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) LSF0204DPWR ACTIVE TSSOP PW 14 2000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LSF204D LSF0204DRGYR ACTIVE VQFN RGY 14 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 125 LSF24D LSF0204DRUTR ACTIVE UQFN RUT 12 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 125 SIO LSF0204DYZPR ACTIVE DSBGA YZP 12 3000 Green (RoHS & no Sb/Br) SNAGCU Level-1-260C-UNLIM -40 to 125 G6 LSF0204PWR ACTIVE TSSOP PW 14 2000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LSF204 LSF0204RGYR ACTIVE VQFN RGY 14 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 125 LSF24 LSF0204RUTR ACTIVE UQFN RUT 12 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 125 SIN LSF0204YZPR ACTIVE DSBGA YZP 12 3000 Green (RoHS & no Sb/Br) SNAGCU Level-1-260C-UNLIM -40 to 125 G5 (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com (4) 9-Jul-2015 There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. 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Addendum-Page 2 PACKAGE MATERIALS INFORMATION www.ti.com 8-Jul-2015 TAPE AND REEL INFORMATION *All dimensions are nominal Device LSF0204DPWR Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant TSSOP PW 14 2000 330.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1 LSF0204DRGYR VQFN RGY 14 3000 330.0 12.4 3.75 3.75 1.15 8.0 12.0 Q1 LSF0204DRUTR UQFN RUT 12 3000 180.0 9.5 1.9 2.3 0.75 4.0 8.0 Q1 LSF0204DYZPR DSBGA YZP 12 3000 180.0 8.4 1.63 2.08 0.69 4.0 8.0 Q2 LSF0204PWR TSSOP PW 14 2000 330.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1 LSF0204RGYR VQFN RGY 14 3000 330.0 12.4 3.75 3.75 1.15 8.0 12.0 Q1 LSF0204RUTR UQFN RUT 12 3000 180.0 9.5 1.9 2.3 0.75 4.0 8.0 Q1 LSF0204YZPR DSBGA YZP 12 3000 180.0 8.4 1.63 2.08 0.69 4.0 8.0 Q2 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 8-Jul-2015 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LSF0204DPWR LSF0204DRGYR TSSOP PW 14 2000 364.0 364.0 27.0 VQFN RGY 14 3000 367.0 367.0 35.0 LSF0204DRUTR UQFN RUT 12 3000 184.0 184.0 19.0 LSF0204DYZPR DSBGA YZP 12 3000 182.0 182.0 20.0 LSF0204PWR TSSOP PW 14 2000 364.0 364.0 27.0 LSF0204RGYR VQFN RGY 14 3000 367.0 367.0 35.0 LSF0204RUTR UQFN RUT 12 3000 184.0 184.0 19.0 LSF0204YZPR DSBGA YZP 12 3000 182.0 182.0 20.0 Pack Materials-Page 2 D: Max = 1.972 mm, Min =1.912 mm E: Max = 1.472 mm, Min =1.412 mm IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. 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