LTC4307-1 High Definition Multimedia Interface (HDMI) LevelShifting 2-Wire Bus Buffer U DESCRIPTIO FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Bidirectional Buffer for Display Data Channel (DDC) Compliant with HDMI Specification Version 1.3 DDC Capacitance Requirement Level Translation Between 3.3V and 5V ±5kV Human Body Model ESD Protection 60mV Buffer Offset Independent of Load Compatible with Non-Compliant VOL I2C Devices Isolates Input SDA and SCL Line from Output Compatible with I2CTM, I2C Fast Mode and SMBus READY Open-Drain Output High Impedance SDA, SCL Pins for VCC = 0V Small 8-Lead (3mm × 3mm) DFN and 8-Lead MSOP Packages The LTC4307-1 is a 2-wire bus buffer that provides capacitance buffering between input and output. The HDMI specification requires that devices have less than 50pF of input capacitance on their DDC bus lines. The LTC4307-1’s capacitance buffering feature, in conjunction with its sub-10pF data and clock input capacitance, allows HDMI components to easily meet the 50pF requirement and tolerate high capacitance on the internal bus. The LTC4307-1 also provides level-shifting between 3.3V and 5V systems to allow lower voltage HDMI transmitters, receivers and EEPROM to interface to the 5V DDC bus. READY is an open-drain digital output flag that indicates whether or not the input and output busses are connected and can interface to the HDMI hot plug detect (HPD) signal. When driven high, the ENABLE digital input allows the LTC4307-1 to connect after a stop bit or bus idle. Driving ENABLE low breaks the connection between the input and output busses. U APPLICATIO S ■ ■ ■ HDMI 3.3V/5V Level Translation Capacitance Buffer/Bus Extender , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 7032051, 6356140, 6650174 U TYPICAL APPLICATIO Rising Edge from Asserted Low DVD PLAYER (SOURCE) TV (SINK) 1000 3.3V 1.8k 0.1μF EEPROM 1.8k LTC4307-1 HDMI CABLE HDMI TX IC <50pF 800 10k VCC SDAIN SDAOUT HDMI RX IC SCLIN SCLOUT DDC GROUND 10k ENABLE GND 200mV/DIV 5V 600 LOW OFFSET SDAOUT 400 SDAIN μC 200 0 43071 TA01a 0 100 200 300 400 100ns/DIV 500 600 43071 TA01b 43071fa 1 LTC4307-1 W W U W ABSOLUTE AXI U RATI GS (Notes 1, 6) VCC to GND ................................................. – 0.3V to 6V SDAIN, SCLIN, SDAOUT, SCLOUT, READY, ENABLE .......................................... –0.3V to 6V Maximum Sink Current (SDAIN, SCLIN, SDAOUT, SCLOUT, READY) .............................................. 50mA Operating Temperature Range LTC4307C ................................................ 0°C to 70°C LTC4307I .............................................– 40°C to 85°C Storage Temperature Range DFN ....................................................– 65°C to 125°C MSOP ................................................– 65°C to 150°C Lead Temperature (Soldering, 10 sec) MSOP ............................................................... 300°C PIN CONFIGURATION TOP VIEW TOP VIEW ENABLE 1 8 VCC SCLOUT 2 7 SDAOUT 6 SDAIN 5 READY SCLIN 3 9 GND 4 ENABLE SCLOUT SCLIN GND 1 2 3 4 8 7 6 5 VCC SDAOUT SDAIN READY MS8 PACKAGE 8-LEAD PLASTIC MSOP TJMAX = 125°C, θJA = 200°C/W DD PACKAGE 8-LEAD (3mm × 3mm) PLASTIC DFN TJMAX = 125°C, θJA = 43°C/W EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4307CDD-1#PBF LTC4307CDD-1#TRPBF LDBP 8-Lead (3mm × 3mm) Plastic DFN 0°C to 70°C LTC4307IDD-1#PBF LTC4307IDD-1#TRPBF LDBP 8-Lead (3mm × 3mm) Plastic DFN –40°C to 85°C LTC4307CMS8-1#PBF LTC4307CMS8-1#TRPBF LTDBN 8-Lead Plastic MSOP 0°C to 70°C LTC4307IMS8-1#PBF LTC4307IMS8-1#TRPBF LTDBN 8-Lead Plastic MSOP –40°C to 85°C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 3.3V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Power Supply VCC Positive Supply Voltage ● ● ICC Supply Current VCC = 5.5V, VSCLOUT = VSDAOUT = 0V (Note 5) ISD Shutdown Supply Current VCC = 5.5V, ENABLE = GND, SDA, SCL = 5.5V ● tIDLE Bus Idle Time ● 2.3 55 5.5 V 8 11 mA 900 1200 μA 95 175 μs 43071fa 2 LTC4307-1 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 3.3V, unless otherwise noted. SYMBOL PARAMETER VTHR_ENABLE ENABLE Threshold CONDITIONS MIN TYP MAX 0.8 1.4 2 V IENABLE ENABLE Input Current ENABLE from 0V to VCC tPLH_EN ENABLE Delay Off-On VCC = 3.3V (Figure 1) 0.1 95 ±5 μA μs ● UNITS tPHL_EN ENABLE Delay On-Off VCC = 3.3V (Note 3) (Figure 1) 10 ns tPLH_READY READY Delay Off-On VCC = 3.3V (Note 3) (Figure 1) 10 ns tPHL_READY READY Delay On-Off VCC = 3.3V (Note 3) (Figure 1) VOL_READY READY Output Low Voltage IPULLUP = 3mA, VCC = 2.3V ● IOFF_READY READY Off Leakage Current VCC = READY = 5.5V ● 10 0.1 ns 0.4 V ±5 μA Propagation Delay tPHL SDA/SCL Propagation Delay High to Low CLOAD = 50pF, 2.7k to VCC on SDA, SCL, VCC = 3.3V (Notes 2, 3) (Figure 1) 70 ns tPLH SDA/SCL Propagation Delay Low to High CLOAD = 50pF, 2.7k to VCC on SDA, SCL, VCC = 3.3V (Notes 2, 3) (Figure 1) 10 ns tFALL SDA/SCL Transition Time High to Low CLOAD = 100pF, 10k to VCC on SDA, SCL, VCC = 3.3V (Notes 3, 4) (Figure 1) 30 300 ns 60 100 mV Input-Output Connection ● VOS Input-Output Offset Voltage 2.7k to VCC on SDA, SCL, VCC = 3.3V, Driven SDA, SCL = 0.2V VTHR SDA, SCL Logic Input Threshold Voltage Rising Edge VHYS SDA, SCL Logic Input Threshold Voltage Hysteresis (Note 3) CIN Digital Input Capacitance SDAIN, SDAOUT, SCLIN, SCLOUT (Note 3) ILEAK Input Leakage Current SDA, SCL, Pins ● SDA, SCL Pins, ISINK = 4mA, SDAIN/SCLIN = 0.2V, VCC = 2.7V ● 0 2.7k to VCC on SDA, SCL, VCC = 3.3V, Driven SDA, SCL = 0.1V ● 120 VCC = 3.3V ● VOL VILMAX Output Low Voltage Buffer Input Logic Low Voltage 20 0.45VCC 0.55VCC 0.65VCC V 50 160 mV 10 pF ±5 μA 0.4 V 205 mV 1.2 V Timing Characteristics fI2C,MAX I2C Maximum Operating Frequency (Note 3) tBUF Bus Free Time Between Stop and Start Condition (Note 3) 1.3 μs tHD,STA Hold Time After (Repeated) Start Condition (Note 3) 100 ns tSU,STA Repeated Start Condition Set-Up Time (Note 3) 0 ns tSU,STO Stop Condition Set-Up Time (Note 3) 0 ns tHD,DATI Data Hold Time Input (Note 3) 0 ns tSU,DAT Data Set-Up Time (Note 3) 100 ns Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: See “Propagation Delays” in the Operations section for a discussion of tPHL and tPLH as a function of pull-up resistance and bus capacitance. 400 600 kHz Note 3: Determined by design, not tested in production. Note 4: Measure points are 0.3 • VCC and 0.7 • VCC. Note 5: ICC test performed with connection circuitry active. Note 6: All currents into pins are positive; all voltages are referenced to GND unless otherwise specified. 43071fa 3 LTC4307-1 TIMING DIAGRAMS ENABLE, CONNECT, READY Timing tPHL_READY tPHL_EN tPLH_READY tPLH_EN ENABLE CONNECT READY 4307 F01a Rising and Falling Propagation Delay and Rise and Fall Times for SDAIN, SDAOUT and SCLIN, SCLOUT tRISE tPLH tPHL tRISE tFALL tFALL SDAIN/SCLIN SDAOUT/SCLOUT 4307 F01b Figure 1. Timing Diagrams 43071fa 4 LTC4307-1 U W TYPICAL PERFOR A CE CHARACTERISTICS ICC vs Temperature TA = 25°C, VCC = 3.3V, unless otherwise indicated. Input-Output High to Low Propagation Delay vs Temperature ISD vs Temperature 100 950 8.3 VCC = 5.5V 8.0 VCC = 5.5V VCC = 5.5V 900 7.7 7.1 6.8 VCC = 3.3V 850 tPHL (ns) ISD (μA) VCC = 3.3V VCC = 3.3V 800 60 40 VCC = 2.3V 6.5 750 –25 0 50 25 TEMPERATURE (°C) 75 100 700 –50 –25 CIN = COUT = 50pF RPULLUPIN = RPULLUPOUT = 10k 25 50 0 TEMPERATURE (°C) 75 Input-Output High to Low Propagation Delay vs COUT –25 0 25 50 TEMPERATURE (°C) 75 100 4307 G03 Connection Circuitry VOUT – VIN (VOS) 130 85 CIN = 50pF RPULLUPIN = RPULLUPOUT = 10k 120 0 –50 100 4307 G02 4307 G01 75 110 VCC = 5.5V VOUT – VIN (mV) 5.9 –50 20 VCC = 2.3V 6.2 tPHL (ns) ICC (mA) 7.4 VCC = 2.3V 80 100 90 VCC = 3.3V 80 65 55 70 60 0 200 400 600 COUT (pF) 800 1000 4307 G04 45 1 2 3 4 6 7 5 RPULLUP (kΩ) 8 9 10 4307 G05 43071fa 5 LTC4307-1 U U U PI FU CTIO S ENABLE (Pin 1): Connection Enable Input. This is a 1.4V digital threshold input pin. For normal operation pull or tie ENABLE high. Driving ENABLE below 0.8V isolates SDAIN from SDAOUT, SCLIN from SCLOUT and asserts READY low. A rising edge on ENABLE after a fault has occurred forces a connection between SDAIN, SDAOUT and SCLIN, SCLOUT. Connect to VCC if unused. pulls low when ENABLE is low, or when the start-up and connection sequence described in the Operation section has not been completed. READY goes high when ENABLE is high and a connection is made. READY can be used to control the HDMI HPD signal. Connect a pull-up resistor, typically 10k, from this pin to VCC to provide the pull-up. This pin can be floated if unused. SCLOUT (Pin 2): Serial Clock Output. Connect this pin to the clock line of a DDC bus. A pull-up resistor should be connected between this pin and a supply voltage greater than or equal to the VCC voltage. SDAIN (Pin 6): Serial Data Input. Connect this pin to the data line of a DDC bus. A pull-up resistor should be connected between this pin and a supply voltage greater than or equal to the VCC voltage. SCLIN (Pin 3): Serial Clock Input. Connect this pin to the clock line of a DDC bus. A pull-up resistor should be connected between this pin and a supply voltage greater than or equal to the VCC voltage. SDAOUT (Pin 7): Serial Data Output. Connect this pin to the data line of a DDC bus. A pull-up resistor should be connected between this pin and a supply voltage greater than or equal to the VCC voltage. GND (Pin 4): Device Ground. Connect this pin to a ground plane for best results. VCC (Pin 8): Supply Voltage Input. Place a bypass capacitor of at least 0.01μF close to VCC for best results. READY (Pin 5): Connection READY Status Output. The READY pin is an open-drain N-channel MOSFET output that Exposed Pad (Pin 9, DFN Package Only): Exposed Pad may be left open or connected to device ground. 43071fa 6 LTC4307-1 W BLOCK DIAGRA Low Offset Level-Shifting 2-Wire Bus Buffer VCC 8 CONNECT 6 SDAIN SDAOUT SLEW RATE DETECTOR 7 SLEW RATE DETECTOR CONNECT CONNECT 3 SCLIN SCLOUT SLEW RATE DETECTOR 2 SLEW RATE DETECTOR + CONNECT + – 0.55VCC 0.55VCC – + + LOGIC 0.55VCC – 0.55VCC – READY CONNECT 1 ENABLE 5 + 1.4V – UVLO 95μs DELAY CONNECT GND 4 43071 BD 43071fa 7 LTC4307-1 OPERATION Start-Up Input to Output Offset Voltage When the LTC4307-1 first receives power on its VCC pin during power-up, it starts in an undervoltage lockout (UVLO) state, ignoring any activity on the SDA or SCL pins until VCC rises above 2V (typ). This is to ensure that the LTC4307-1 does not try to function until it has enough voltage to do so. When a logic low voltage, VLOW1, is driven on any of the LTC4307-1’s data or clock pins, the LTC4307-1 regulates the voltage on the opposite data or clock pins to a slightly higher voltage, typically 60mV above VLOW1. This offset is practically independent of pull-up current (see the Typical Performance curves). Once the LTC4307-1 comes out of UVLO, it monitors both 2-wire busses for either a stop bit or bus idle condition to indicate the completion of data transactions. When both sides are idle or one side has a stop bit condition while the other is idle, the input-to-output connection circuitry is activated, joining SDAIN to SDAOUT and SCLIN to SCLOUT. Propagation Delays Connection Circuitry Once the connection circuitry is activated, the functionality of the SDAIN and SDAOUT pins is identical. A low forced on either pin at any time results in both pin voltages being low. The LTC4307-1 is tolerant of I2C bus DC logic low voltages up to the 0.3VCC VIL I2C specification. When the LTC4307-1 senses a rising edge on the bus, it deactivates its pull-down devices for bus voltages as low as 0.48V. Care must be taken to ensure that devices participating in clock stretching or arbitration force logic low voltages below 0.48V at the LTC4307-1 inputs. SDAIN and SDAOUT enter a logic high state only when all devices on both SDAIN and SDAOUT release high. The same is true for SCLIN and SCLOUT. This important feature ensures that clock stretching, clock synchronization, arbitration and the acknowledge protocol always work, regardless of how the devices in the system are tied to the LTC4307-1. Another key feature of the connection circuitry is that it provides bidirectional buffering, keeping the capacitances of the two 2-wire busses isolated from each other. Placing an LTC4307-1 close to an HDMI port inside an HDMI transmitter or receiver allows the HDMI device to pass the capacitance compliance specification. Because of this isolation, the waveforms on SDAIN and SCLIN look slightly different than the corresponding waveforms on SDAOUT and SCLOUT as described here. During a rising edge, the rise time on each side is determined by the bus pull-up resistor and the equivalent capacitance on the line. If the pull-up resistors are the same, a difference in rise time occurs which is directly proportional to the difference in capacitance between the two sides. Users must account for differences in the RC time constants between the two 2-wire busses and ensure that all system timing specifications are met on both busses. There is a finite propagation delay through the connection circuitry for falling waveforms. Figure 2 shows the falling edge waveforms for VCC = 5.5V, a 10k pull-up resistor on each side, 150pF parasitic capacitance on the input bus and 50pF on the output pins. An external N-channel MOSFET device pulls down the voltage on the side with 150pF capacitance; the LTC4307-1 pulls down the voltage on the opposite side with a delay of 80ns. This delay is always positive and is a function of supply voltage, temperature and the pull-up resistors and equivalent bus capacitances on both sides of the bus. The Typical Performance Characteristics section shows propagation delay as a function of temperature and voltage for 10k pull-up resistors and 50pF equivalent capacitance on both sides of the part. Also, the tPHL vs COUT curve for VCC = 5.5V shows that increasing the INPUT SIDE 150pF 1V/DIV OUTPUT SIDE 50pF 1V/DIV 200ns/DIV 43071 F02 Figure 2. Input-Output Falling Edge Waveforms 43071fa 8 LTC4307-1 OPERATION capacitance from 50pF to 150pF results in a tPHL increase from 81ns to 91ns. Larger output capacitances translate to longer delays (up to 125ns). Users must quantify the difference in propagation times for a rising edge versus a falling edge in their systems and adjust setup and hold times accordingly. READY Digital Output This pin provides a digital flag which is low when either ENABLE is low or the start-up sequence described earlier in this section has not been completed. READY goes high when ENABLE is high and the input and output 2-wire busses are connected. The pin is driven by an open-drain pull-down capable of sinking 3mA while holding 0.4V on the pin. Connect a resistor to VCC to provide the pull-up. READY can be used to control the HDMI hot plug detect (HPD) signal to prevent the possibility of erroneous attempts by the source to contact the sink before the sink is ready to communicate. ENABLE When the ENABLE pin is driven below 0.8V with respect to the LTC4307-1’s ground, the input 2-wire bus is disconnected from the output 2-wire bus and the READY pin is internally pulled low. When the pin is driven above 2V, the part waits for data transactions on both 2-wire busses to be complete (as described in the Start-Up section) before connecting the two sides. At this time the internal pull-down on READY releases. LTC4307 and LTC4307-1 Feature Differences The LTC4307-1 HDMI level-shifting 2-wire bus buffer is specifically intended for HDMI applications. Features in the general purpose LTC4307 device that are not required in HDMI systems have been removed. In addition, levelshifting functionality has been added to the LTC4307-1 to allow 3.3V HDMI devices to interface safely to the 5V HDMI DDC bus. See Table 1 for a list of the differences between the LTC4307 and LTC4307 -1. Table 1. Differences Between the LTC4307 and the LTC4307-1 SPECIFICATION Pre-charge LTC4307 LTC4307-1 COMMENTS ON LTC4307-1 Yes No Level Shifting No Yes, 2.2V to 5.5V HDMI DDC Lines are Not Hot Swapped Stuck Bus Disconnect and Recovery Yes No Stuck Busses, Not an Issue in HDMI Systems Rise Time Accelerators Yes No Complies with HDMI Specification Version 1.3 DDC Capacitance Requirement Provides Communication Between 3.3V and 5V DDC Busses, Protects 3.3V Devices from 5V Supply APPLICATIONS INFORMATION Figure 3 shows the LTC4307-1 in a capacitance buffering application. Due to the LTC4307-1’s capacitance buffering feature and sub-10pF input capacitance, this application circuit passes the HDMI 50pF maximum DDC capacitance specification easily when the LTC4307-1 is located right at the HDMI connector interface as shown. The capacitance of the internal bus connected to the SDAIN and SCLIN pins may be much larger than 50pF, but because of the LTC4307-1’s capacitance buffering, the internal bus capacitance is isolated from the HDMI connector. In HDMI, the sink device pulls the hot plug detect HPD signal high to tell the source that it is ready to accept commands through the DDC. This signal can be controlled through the READY pin of the LTC4307-1 to prevent the possibility of erroneous attempts by the source to contact the sink before the sink is ready to return its extended display identification data (EDID). The READY pin only goes high after 5V is applied and the LTC4307-1 ENABLE pin is pulled high by the HDMI receiver IC, a controller in the sink, or the 5V line itself. 43071fa 9 LTC4307-1 APPLICATIONS INFORMATION Figure 4 shows the LTC4307-1 being used for capacitance buffering and 5V to 3.3V level shifting. In this application, the EEPROM is powered by a backup 3.3V supply that is available when the component is turned off. The EDID in the EEPROM should be available for reading even when a component’s power is off. Although the applications shown in this section are for HDMI receive channels, the LTC4307-1 can also be used in HDMI transmit channels with equal success as shown in the Typical Application on the last page of this data sheet. 5V 5V R1 1.8k C1 0.1μF R2 1.8k R4 47k R5 1k SDA LTC4307-1 VCC READY R6 100k R7 10k R8 10k EEPROM VCC SCL SDA GND 3.3V R9 10k R10 10k SDAOUT SDAIN TO SCL HDMI TX IC HPD SCLOUT SCLIN HDMI CABLE DDC R3 100k DDC/CEC GROUND HDMI SOURCE (DVD PLAYER) HDMI RX IC ENABLE GND HDMI SINK (DIGITAL TV) 43071 F03 Figure 3. The LTC4307-1 in HDMI Capacitance Buffering Application SWITCHED 3.3V BACKUP 3.3V 5V 5V R1 1.8k R2 1.8k TO SDA HDMI SCL TX IC R3 47k R4 47k LTC4307-1 READY VCC R5 100k R6 10k R7 10k HDMI RX IC SDAIN SDAOUT HDMI CABLE SCLIN SCLOUT DDC DDC/CEC GROUND HDMI SOURCE (DVD PLAYER) C1 0.1μF EEPROM VCC SCL SDA ENABLE GND μC HDMI REPEATER (DIGITAL RECEIVER) 43071 F04 Figure 4. The LTC4307-1 in a Level Shifting and Capacitance Buffering HDMI Application with Backup 3.3V 43071fa 10 LTC4307-1 PACKAGE DESCRIPTION DD Package 8-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG # 05-08-1698) R = 0.115 TYP 5 0.38 ± 0.10 8 0.675 ±0.05 3.5 ±0.05 1.65 ±0.05 2.15 ±0.05 (2 SIDES) 3.00 ±0.10 (4 SIDES) PACKAGE OUTLINE 1.65 ± 0.10 (2 SIDES) PIN 1 TOP MARK (NOTE 6) (DD8) DFN 1203 0.75 ±0.05 0.200 REF 0.25 ± 0.05 4 0.25 ± 0.05 0.50 BSC 2.38 ±0.05 (2 SIDES) 1 0.50 BSC 2.38 ±0.10 (2 SIDES) 0.00 – 0.05 BOTTOM VIEW—EXPOSED PAD RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1) 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON TOP AND BOTTOM OF PACKAGE MS8 Package 8-Lead Plastic MSOP (Reference LTC DWG # 05-08-1660 Rev F) 3.00 ± 0.102 (.118 ± .004) (NOTE 3) 0.889 ± 0.127 (.035 ± .005) 0.254 (.010) 8 7 6 5 3.00 ± 0.102 (.118 ± .004) (NOTE 4) 4.90 ± 0.152 (.193 ± .006) DETAIL “A” 0.52 (.0205) REF 0° – 6° TYP GAUGE PLANE 5.23 (.206) MIN 1 3.20 – 3.45 (.126 – .136) 0.53 ± 0.152 (.021 ± .006) DETAIL “A” 0.42 ± 0.038 (.0165 ± .0015) TYP 0.65 (.0256) BSC 1.10 (.043) MAX 2 3 4 0.86 (.034) REF 0.18 (.007) RECOMMENDED SOLDER PAD LAYOUT NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX SEATING PLANE 0.22 – 0.38 (.009 – .015) TYP 0.65 (.0256) BSC 0.1016 ± 0.0508 (.004 ± .002) MSOP (MS8) 0307 REV F 43071fa Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 11 LTC4307-1 TYPICAL APPLICATION HDMI Application with LTC4307-1’s Providing Capacitance Buffering On Both the Transmit and Receive Channels DVD PLAYER (SOURCE) TV (SINK) 5V C1 0.1μF R1 10k R2 10k LTC4307-1 VCC READY C2 0.1μF R3 10k R4 1.8k R5 1.8k HDMI CABLE SDAIN SDAOUT HDMI TX IC 3.3V EEPROM <50pF SCLIN SCLOUT LTC4307-1 VCC READY R6 10k R7 10k SDAIN SDAOUT HDMI RX IC SCLIN SCLOUT ENABLE ENABLE GND GND μC DDC GROUND 43071 TA02 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LTC1380/LTC1393 Single-Ended 8-Channel/Differential 4-Channel Analog MUX with SMBus Interface Low RON: 35Ω Single Ended/70Ω Differential, Expandable to 32 Single or 16 Differential Channels LTC1427-50 Micropower, 10-Bit Current Output DAC with SMBus Interface Precision 50μA ±2.5% Tolerance Over Temperature, Four Selectable SMBus Addresses, DAC Powers Up at Zero or Midscale LTC1623 Dual High Side Switch Controller with SMBus Interface Eight Selectable Addresses/16-Channel Capability LTC1663 SMBus Interface 10-Bit Rail-to-Rail Micropower DAC DNL < 0.75LSB Max, 5-Lead SOT-23 Package LTC1694/LTC1694-1 SMBus Accelerator Improved SMBus/I2C Rise Time, Ensures Data Integrity with Multiple SMBus/I2C Devices LTC1695 SMBus/I2C Fan Speed Controller in ThinSOTTM Package 0.75Ω PMOS 180mA Regulator, 6-Bit DAC LT1786F SMBus Controlled CCFL Switching Regulator 1.25A, 200kHz Floating or Grounded Lamp Configurations LTC1840 Dual I2C Fan Speed Controller Two 100μA 8-Bit DACs, Two Tach Inputs, Four GPIO LTC4300A-1/ LTC4300A-2/ LTC4300A-3 Hot Swappable 2-Wire Bus Buffers LTC4300A-1: Bus Buffer with READY, ACC and ENABLE LTC4300A-2: Dual Supply Bus Buffer with READY and ACC LTC4300A-3: Dual Supply Bus Buffer with READY and ENABLE LTC4301 Supply Independent Hot Swappable 2-Wire Bus Buffer Supply Independent LTC4301L Hot Swappable 2-Wire Bus Buffer with Low Voltage Level Translation Allows Bus Pull-Up Voltages as Low as 1V on SDAIN and SCLIN LTC4302-1/LTC4302-2 Addressable 2-Wire Bus Buffer Address Expansion, GPIO, Software Controlled LTC4303/LTC4304 Hot Swappable 2-Wire Bus Buffers with Stuck Bus Recovery Provides Automatic Clocking to Free Stuck I2C Busses LTC4305/LTC4306 2-/4-Channel, 2-Wire Bus Multiplexers with Capacitance Buffering 2/4 Selectable Downstream Busses, Stuck Bus Disconnect, Rise Time Accelerators, Fault Reporting, ±10kV HBM ESD Tolerance LTC4307 Low Offset Hot-Swappable 2-Wire Bus Buffer with Stuck Bus Recovery 60mV Buffer Offset, 30ms Stuck Bus Disconnect and Recovery ThinSOT is a trademark of Linear Technology Corporation 43071fa 12 Linear Technology Corporation LT 0208 REV A • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2007