CM2020-01TR

CM2020-01TR HDMI Transmitter Port Protection and Interface Device Product Description The CM2020−01TR HDMI Transmitter Port Protection and Interface Device is specifically designed for next generation HDMI Source interface protection. An integrated package provides all ESD, level shift, overcurrent output protection and backdrive protection for an HDMI port in a single 38−Pin TSSOP package. The CM2020−01TR part is specifically designed to complement the CM2021 protection part in HDMI receivers (displays, DTV, CE devices, etc.) The CM2020−01TR also incorporates a silicon overcurrent protection device for +5 V supply voltage output to the connector. http://onsemi.com TSSOP 38 TR SUFFIX CASE 948AG Features • • • • • • • • • HDMI 1.3 Compliant 0.05 pF Matching Capacitance between the TMDS Intra−Pair Overcurrent Output Protection Level Shifting/Isolation Circuitry ±8 kV ESD Protection on all External Lines Matched 0.5 mm Trace Spacing (TSSOP) Simplified Layout for HDMI Connectors Backdrive Protection These Devices are Pb−Free and are RoHS Compliant Applications • • • • April, 2011 − Rev. 5 CM2020−01TR CM2020−01TR = Specific Device Code ORDERING INFORMATION Device Package Shipping† CM2020−01TR TSSOP−38 (Pb−Free) 2500/Tape & Reel †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. PC Consumer Electronics Set Top Box DVD/RW Players © Semiconductor Components Industries, LLC, 2011 MARKING DIAGRAM 1 Publication Order Number: CM2020−01TR/D CM2020−01TR ELECTRICAL SCHEMATIC ESD_BYP 5V_SUPPLY TMDS_D2+ TMDS_GND TMDS_D2− TMDS_D1+ TMDS_D0+ TMDS_CK+ TMDS_GND TMDS_GND TMDS_GND TMDS_D1− TMDS_D0− TMDS_CK− LV SUPPLY CE_REMOTE_IN LV SUPPLY LV SUPPLY DDC_CLK_IN DDC_DAT_OUT DDC_DAT_IN CE_REMOTE_OUT LV SUPPLY DDC_CLK_OUT 55 mA Overcurrent Switch 5V_SUPPLY HOTPLUG_DET_OUT HOTPLUG_DET_IN 5V_OUT PACKAGE / PINOUT DIAGRAM Top View 5V_SUPPLY 1 38 5V_OUT LV_SUPPLY 2 37 ESD_BYP GND 3 36 GND TMDS_D2+ 4 35 TMDS_D2+ TMDS_GND 5 34 TMDS_GND TMDS_D2− 6 33 TMDS_D2− TMDS_D1+ 7 32 TMDS_D1+ TMDS_GND 8 31 TMDS_GND TMDS_D1− 9 30 TMDS_D1− TMDS_D0+ 10 29 TMDS_D0+ TMDS_GND 11 28 TMDS_GND TMDS_D0− 12 27 TMDS_D0− TMDS_CK+ 13 26 TMDS_CK+ TMDS_GND 14 25 TMDS_GND TMDS_CK− 15 24 TMDS_CK− CE_REMOTE_IN 16 23 CE_REMOTE_OUT DDC_CLK_IN 17 22 DDC_CLK_OUT DDC_DAT_IN 18 21 DDC_DAT_OUT HOTPLUG_DET_IN 19 20 HOTPLUG_DET_OUT 38−Pin TSSOP Package http://onsemi.com 2 CM2020−01TR Table 1. PIN DESCRIPTIONS Pins Name ESD Level 4, 35 TMDS_D2+ 8 kV (Note 2) TMDS 0.9 pF ESD Protection (Note 1) Description 6, 33 TMDS_D2− 8 kV (Note 2) TMDS 0.9 pF ESD Protection (Note 1) 7, 32 TMDS_D1+ 8 kV (Note 2) TMDS 0.9 pF ESD Protection (Note 1) 9, 30 TMDS_D1− 8 kV (Note 2) TMDS 0.9 pF ESD Protection (Note 1) 10, 29 TMDS_D0+ 8 kV (Note 2) TMDS 0.9 pF ESD Protection (Note 1) 12, 27 TMDS_D0− 8 kV (Note 2) TMDS 0.9 pF ESD Protection (Note 1) 13, 26 TMDS_CK+ 8 kV (Note 2) TMDS 0.9 pF ESD Protection (Note 1) 15, 24 TMDS_CK− 8 kV (Note 2) TMDS 0.9 pF ESD Protection (Note 1) 16 CE_REMOTE_IN 2 kV (Note 3) LV_SUPPLY Referenced Logic Level into ASIC 23 CE_REMOTE_OUT 8 kV(Note 2) 5V_SUPPLY Referenced Logic Level Out plus 3.5 pF ESD to Connector 17 DDC_CLK_IN 2 kV (Note 3) LV_SUPPLY Referenced Logic Level into ASIC 22 DDC_CLK_OUT 8 kV (Note 2) 5V_SUPPLY Referenced Logic Level Out plus 3.5 pF ESD to Connector 18 DDC_DAT_IN 2 kV (Note 3) LV_SUPPLY Referenced Logic Level into ASIC 21 DDC_DAT_OUT 8 kV (Note 2) 5V_SUPPLY Referenced Logic Level Out plus 3.5 pF ESD to Connector 19 HOTPLUG_DET_IN 2 kV (Note 3) LV_SUPPLY Referenced Logic Level into ASIC 20 HOTPLUG_DET_OUT 8 kV (Note 2) 5V_SUPPLY Referenced Logic Level Out plus 3.5 pF ESD to Connector 2 LV_SUPPLY 2 kV (Note 3) Bias for CE / DDC / HOTPLUG Level Shifters 1 5V_SUPPLY 2 kV (Note 3) Current Source for 5V_OUT 38 5V_OUT 8 kV (Note 2) 55 mA Minimum Overcurrent Protected 5 V Output. This Output Must be Bypassed with a 0.1 mF Ceramic Capacitor. 37 ESD_BYP 2 kV (Note 3) This Pin may be Connected to a 0.1 mF Ceramic Capacitor, but it is not necessary. 3, 36 GND N/A Supply GND Reference 5, 34, 8, 31, 11, 28, 14, 25 TMDS_GND N/A TMDS ESD and Parasitic GND Return (Note 4) 1. These 2 pins need to be connected together in−line on the PCB. 2. Standard IEC 61000−4−2, CDISCHARGE = 150 pF, RDISCHARGE = 330 W, 5V_SUPPLY and LV_SUPPLY within recommended operating conditions, GND = 0 V, 5V_OUT (pin 38), each bypassed with a 0.1 mF ceramic capacitor connected to GND. 3. Human Body Model per MIL−STD−883, Method 3015, CDISCHARGE = 100 pF, RDISCHARGE = 1.5 kW, 5V_SUPPLY and LV_SUPPLY within recommended operating conditions, GND = 0 V and 5V_OUT (pin 38), and each bypassed with a 0.1 mF ceramic capacitor connected to GND. 4. These pins should be routed directly to the associated GND pins on the HDMI connector with single point ground vias at the connector. http://onsemi.com 3 CM2020−01TR BACKDRIVE PROTECTION In a more serious scenario, if any SOC devices are incorporated in the design which have built−in level shifter and DRC diodes for ESD protection, there is even a risk for permanent damage. In this case, if there is a pullup resistor (such as with DDC) on the other end of the cable, that resistance will pull the SOC chips “output” up to a high level. This will forward bias the upper ESD diode in the DRC and charge the bulk capacitance in a similar fashion as described in the first example. If this current flow is high enough, even as little as a few milliamps, it could destroy one of the SOC chip’s internal DRC diodes, as they are not designed for passing DC. To avoid either of these situations, the CM2020−01TR was designed to block backdrive current, guaranteeing no more than 5 mA on any I/O pin when the I/O pin voltage is greater than the CM2020−01TR supply voltage. Below, two scenarios are discussed to illustrate what can happen when a powered device is connected to an unpowered device via a HDMI interface, substantiating the need for backdrive protection on this type of interface. In the first example a DVD player is connected to a TV via an HDMI interface. If the DVD player is switched off and the TV is left on, there is a possibility of reverse current flow back into the main power supply rail of the DVD player. Typically, the DVD’s power supply has some form of bulk supply capacitance associated with it. Because all CMOS logic exhibits a very high impedance on the power rail node when “off”, if there may be very little parasitic shunt resistance, and even with as little as a few milliamps of “backdrive” current flowing into the power rail, it is possible over time to charge that bulk supply capacitance to some intermediate level. If this level rises above the power−on−reset (POR) voltage level of some of the integrated circuits in the DVD player, these devices may not reset properly when the DVD player is turned back on. Figure 1. Backdrive Protection Diagram. SPECIFICATIONS Table 2. ABSOLUTE MAXIMUM RATINGS Parameter Rating Units VCC5V, VCCLV 6.0 V DC Voltage at any Channel Input 6.0 V −65 to +150 °C Storage Temperature Range Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. Table 3. STANDARD (RECOMMENDED) OPERATING CONDITIONS Symbol Parameter 5V_SUPPLY Operating Supply Voltage LV_SUPPLY Bias Supply Voltage − Operating Temperature Range Min Typ Max Units GND 5 5.5 V 1 3.3 5.5 V –40 − 85 °C http://onsemi.com 4 CM2020−01TR SPECIFICATIONS (Cont’d) Table 4. ELECTRICAL OPERATING CHARACTERISTICS (Note 1) Symbol Parameter Conditions Min Typ Max Units ICC5V Operating Supply Current 5V_SUPPLY = 5.0 V 110 130 mA ICCLV Bias Supply Current LV_SUPPLY = 3.3 V 1 5 mA VDROP 5V_OUT Overcurrent Output Drop 5V_SUPPLY = 5.0 V, IOUT = 55 mA 65 100 mV ISC 5V_OUT Short Circuit Current Limit 5V_SUPPLY = 5.0 V, 5V_OUT = GND 135 175 mA IOFF OFF State Leakage Current, Level Shifting NFET LV_SUPPLY = 0 V 0.1 5.0 mA IBACKDRIVE Current Conducted from Output Pins to V_SUPPLY Rails when Powered Down 5V_SUPPLY < VCH_OUT Signal Pins: TMDS_D[2:0]+/−, TMDS_CK+/−, CE_REMOTE_OUT, DDC_DAT_OUT, DDC_CLK_OUT, HOTPLUG_DET_OUT, 5V_OUT Only 0.1 5.0 mA IBACKDRIVE, CEC Current through CE−REMOTE_OUT when Powered Down CE−REMOTE_IN = CE_SUPPLY < CE_REMOTE_OUT 0.1 1.0 mA VOLTAGE Drop Across Level Shifting NFET when ON LV_SUPPLY = 2.5 V, VS = GND, IDS = 3 mA 75 95 140 mV Diode Forward Voltage Top Diode Bottom Diode IF = 8 mA, TA = 25°C 0.60 0.60 0.85 0.85 0.95 0.95 ESD Withstand Voltage Contact Discharge per IEC 61000−4−2 Standard Pins 4, 7, 10, 13, 20, 21, 22, 23, 24, 27, 30, 33, 38 (Note 2) Channel Clamp Voltage Positive Transients Negative Transients TA = 25°C, IPP = 1 A, tP = 8/20 ms (Note 3) RDYN Dynamic Resistance Positive Transients Negative Transients TA = 25°C, IPP = 1 A, tP = 8/20 ms (Note 3) ILEAK TMDS Channel Leakage Current TA = 25°C 0.01 1 mA TMDS Channel Input Capacitance 5V_SUPPLY = 5.0 V, Measured at 1 MHz, VBIAS = 2.5 V 0.9 1.2 pF TMDS Channel Input Capacitance Matching 5V_SUPPLY = 5.0 V, Measured at 1 MHz, VBIAS = 2.5 V (Note 4) 0.05 CIN, DDC Level Shifting Input Capacitance, Capacitance to GND 5V_SUPPLY = 5 V, Measured at 100 kHz, VBIAS = 2.5 V 3.5 4 pF CIN, CEC Level Shifting Input Capacitance, Capacitance to GND 5V_SUPPLY = 5 V, Measured at 100 kHz, VBIAS = 2.5 V 3.5 4 pF CIN, HP Level Shifting Input Capacitance, Capacitance to GND 5V_SUPPLY = 5 V, Measured at 100 kHz, VBIAS = 2.5 V 3.5 4 pF VON VF VESD VCL CIN, TMDS DCIN, TMDS 90 V kV ±8 V 11.0 −2.0 W 1.2 0.9 pF 1. Operating Characteristics are over Standard Operating Conditions unless otherwise specified. 2. Standard IEC 61000−4−2, CDISCHARGE = 150 pF, RDISCHARGE = 330 W, 5V_SUPPLY and LV_SUPPLY within recommended operating conditions, GND = 0 V, 5V_OUT (pin 38), each bypassed with a 0.1 mF ceramic capacitor connected to GND. 3. These measurements performed with no external capacitor on ESD_BYP. 4. Intra−pair matching, each TMDS pair (i.e. D+, D−). http://onsemi.com 5 CM2020−01TR PERFORMANCE INFORMATION Typical Filter Performance (TA = 25°C, DC Bias = 0 V, 50 W Environment) Figure 2. Insertion Loss vs. Frequency (TMDS_D1− to GND) http://onsemi.com 6 CM2020−01TR APPLICATION INFORMATION LAYOUT NOTES NOTE 1) Differential TMDS Pairs should be designed as normal 100 W HDMI microstrip. Single Ended TMDS traces underneath CM2020 and between CM2020 and Connector should be tuned to match chip/connector parasitics. (See MediaGuardt Application Notes.) NOTE 2) Level Shifter signals should be biased with a weak pullup to the desired local LV_SUPPLY. If the local ASIC includes sufficient pullups to register a logic high when the CM2020 NFET is “off”, then external pullups are not needed. NOTE 3) Place CM2020 as close to conector as possible, and as with any controlled impedance line avoid ANY silkscreening over TMDS lines. NOTE 4) CBYP (Bypass Capacitor) is optional for the CM2020−01TR. NOTE 5) CEC pullup isolation. The 27k RCEC and a Schottky DCEC provide the necessary isolation for the CEC pullup. Figure 3. Typical Application for CM2020−01TR http://onsemi.com 7 CM2020−01TR APPLICATION INFORMATION (Cont’d) Design Considerations 5V Overcurrent Output Maximum Overcurrent Protection output drop at 55 mA on 5V_OUT is 100 mV. To meet HDMI output requirements of 4.8 − 5.3 V, an input of greater than 4.9 V should be used (i.e. 5.1 V ±4%). A 0.1 mF ceramic bypass capacitor on this output is also recommended. Hotplug Detect Input To meet the requirements of HDMI CTS TID7−12, the following pullup/pulldown configuration is recommended for a 3.3 V ±10% internal VCC rail (See Figure 4 below). A 0.1 mF ceramic capacitor is recommended for additional edge debounce and ESD bypass. DUT On vs. DUT Off Many HDMI CTS tests require a power off condition on the System Under Test. Many Dual Rail Clamp (DRC) ESD diode configurations will be forward biased when their VDD rail is lower than the I/O pin bias, thereby exhibiting extremely high apparent capacitance measurements, for example. The MediaGuardt backdrive isolation circuitry limits this current to < 5 mA, and will help ensure compliance. LV_SUPPLY 5V_SUPPLY 3.3 V RPU 47K RPU 47K RPU 47K D2+ D2− D1+ D1− D0+ D0− CK+ CK− CEC DOC_CLK DOC_DAT HOTPLUG HDMI ASIC RPU 47K OPTIONAL CM2020 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 VOUT 38 5V LV BYPASS 37 GND 36 GND D2+ 35 D2+ GND 34 GND D2− 33 D2− D1+ 32 D1+ GND 31 GND D1− 30 D1− D0+ 29 D0+ GND 28 GND D0− 27 D0− CK+ 26 CK+ GND 25 GND CK− 24 CK− CEC_I CEC−O 23 SCK_I SCK−O 22 SDA_I SDA−O 21 HPD_I HPD−O 20 RCEC 27K CBYP 100 nF 1 2 3 4 5 6 7 8 9 10 11 RSCL 4.7K RSDA 4.7K RPD 15K LV DOMAIN “IN” TO ASIC 5V DOMAIN “OUT” TO CABLE Figure 4. Design Example MediaGuard is a trademark of Nagra France. http://onsemi.com 8 TP1 HDMI COUT 100 nF 12 13 14 15 16 17 18 19 D2+ GND D2− D1+ GND D1− D0+ GND D0− CK+ GND CK− CEC N/C SCL SDA DDC GND +5V HOTPLUG MECHANICAL CASE OUTLINE PACKAGE DIMENSIONS TSSOP 38 CASE 948AG−01 ISSUE O DOCUMENT NUMBER: DESCRIPTION: 98AON31614E TSSOP 38 DATE 31 JUL 2008 Electronic versions are uncontrolled except when accessed directly from the Document Repository. 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