PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch Features Description • Dual 2x2 Crosspoint/Repeater Switch • Meets or Exceeds the Requirements of ANSI TIA/EIA-644-1995 • Designed for Signaling Rates up to 650 Mbit/s (325Mhz) • Operates from a single 3.3V Supply: –40°C to 85°C • Low-Voltage Differential Signaling with Output Voltages of ±350mV into: - 100Ω load (PI90LV044) - 50Ω load Bus LVDS Signaling (PI90LVB044) • Accepts ±350mV differential inputs • Wide common mode input range: 0.2V to 2.7V • Output drivers are high impedance when disabled or when VCC ≤ 1.5V • Inputs are open, short, and terminated fail safe • Propagation Delay Time: 3.5ns • ESD protection is 10kV on bus pins • Bus Pins are High Impedance when disabled or with VCC less than 1.5V • TTL Inputs are 5V Tolerant • Power Dissipation at 400 Mbit/s of 250mW • Packaging (Pb-free & Green available): - 28-pin QSOP (Q) - 28-pin TSSOP (L) The PI90LV044 and PI90LVB044 are monolithic dual 2x2 asynchronous crosspoint/repeater switches. The crosspoint function is based on a multiplexer tree architecture. Each 2x2 switch can be considered as a pair of 2:1 multiplexers that share the same inputs. The signal path through each switch is fully differential with minimal propagation delay. The signal path is unregistered, so no clock is required for the data inputs. The signal line drivers and receivers use Low Voltage Differential Signaling (LVDS) to achieve signaling rates as high as 650Mbps. The LVDS standard provides a minimum differential output voltage magnitude of 247 mV into a 100Ω load and receipt of 100 mV signals with up to 1V of ground potential difference between a transmitter and receiver. The PI90LVB044 doubles the output drive current to achieve LVDS levels with a 50 ohm load. The intended application of these devices is for loop-through and redundant channel switching for both point-to-point baseband (PI90LV044) and multipoint (PI90LVB044) data transmissions over controlled impedance media. Pin Configuration Block Diagram S0,S1 1A/1B 2A/2B 3A/3B 1DE/2DE 1Y/1Z 2Y/2Z 3Y/3Z 4A/4B 4Y/4Z S2/S3 3DE/4DE 1 1B 1 28 VCC 1A 2 27 1Y S0 3 26 1Z 1DE 4 25 2DE S1 5 24 2Z 2A 6 23 2Y 2B 7 22 GND 3A 8 21 VCC 3B 9 20 3Y S2 10 19 3Z 3DE 11 18 4DE S3 12 17 4Y 4A 13 16 4Z 4B 14 15 GND PS8485D 09/22/04 PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch MUX Truth Table Input Output Function S3, S1 S2, S0 1Y/1Z - 3Y/3Z 2T/2Z - 4Y/4Z 0 0 1A/1B - 3A/3B 1A/1B - 3A/3B Splitter 0 1 2A/2B - 4A/4B 2A/2B - 4A/4B Splitter 1 0 1A/1B - 3A/3B 1A/1B - 3A/3B Router 1 1 2A/2B - 4A/4B 2A/2B - 4A/4B Router Note: 1. Setting nDE to 0 will set Ouput nY/nZ to High Impedance. S1/S0 1DE/2DE 1A/1B 1Y/1Z 2A/2B 2Y/2Z S3/S2 3DE/4DE 3A/3B 3Y/3Z 4A/4B 4Y/4Z Cross Point Router Pass Through Router Router Options S1/S0 1DE/2DE 1A/1B 1Y/1Z 2A/2B 2Y/2Z S3/S2 3DE/4DE 3A/3B 3Y/3Z 4A/4B 4Y/4Z Splitter A Splitter B Splitter Options Figure 1. Possible Signal Routing 2 PS8485D 09/22/04 PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch Absolute Maximum Ratings Over Operating Free-Air Temperature(1) Supply Voltage Range, VCC(1)....................................................................... –0.5V to 4V Voltage Range (DE, S0, S1) ...............................................................–0.5 to 6V Input Voltage Range, VI (A or B)..................................... –0.5V to VCC + 0.5V Electrostatic Discharge: A, B, Y, Z, and GND(2)......... Class 3, A: 16kV, B:600V All Pins..................................................... Class 3, A: 7kV, B:500V Storage Temperature Range ......................................................–65°C to 150°C Lead Temperature 1, 6 mm (1/16 inch) from case for 10 seconds........... 260°C Notes: 1. Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to Absolute-Maximum-Rated conditions for extended periods may affect device reliability. 2. All voltage values, except differential I/O bus voltages, are with respect to ground terminal. 3. Tested in accordance with MIL-STD-883C Method 3015.7 Recommended Operating Conditions Supply Voltage, VCC High-Level input voltage, VIH S1 - S3, 1DE - 4DE Min. Nom. Max. Units 3.0 3.3 3.6 V 2 Low-Level input voltage, VIL 0.8 Magnitude of Differential Input Voltage | VID | 0.1 Common Mode input voltage, VIC (see figure 2) | VID | 2 0.6 2.4 - | VID | 2 VCC - 0.8 Operating free-air Temperature, TA -40 3 85 ºC PS8485D 09/22/04 PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch 2.5 VIC – Common-Mode Input Voltage – V MAX at VCC > 3.15V MAX at VCC = 3V 2 1.5 1 0.5 MIN 0 0.1 0.2 0.3 0.4 0.5 0.6 VID – Differential Input Voltage – V Figure 2. Common-Mode Input Voltage vs. Differential Voltage Receiver Electrical Characteristics Over Recommended Operating Conditions (unless otherwise noted) Symbol Parameter VITH+ Positive going differential input voltage threshold VITH- Negative going differential input voltage threshold II II (OFF) Test Conditions VCM = 1.2V Input current (A or B inputs) Power-off input current (A or B inputs) Typ.(1) Max. 100 -100 VI = 0V -2 VI = 2.4V -1.2 VCC = 0V 4 Min. Units mV -20 µA 20 PS8485D 09/22/04 PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch Receiver/Driver Electrical Characteristics Over Recommended Operating Conditions (unless otherwise noted) Symbol Parameter Test Condition Min. Typ.(1) Max. 440 590 VOD Differential Output voltage magnitude 247 ∆VOD Change in differential Output voltage magnitude between logic states -50 50 VOC(SS) Steady-state common-mode output voltage 1.062 1.375 ∆VOC(SS) Change in steady-state common-mode output voltage between logic states VOC(PP) Peak-to-peak common-mode output voltage ICC RL = 100Ω (LV) RL = 50Ω (LVB) -50 High level input current IIL Low level input current IOS Short circuit output current IOZ High impedence output current IO(OFF) Power off output current CIN Input Capacitance 50 mV V mV 150 No load 16 24 RL = 100Ω (LV) 26 40 RL = 50Ω (LVB) 42 54 All Channels Disabled 6 12 Supply Current IIH 3 Units DE VIH = 5 S1, S2, S3, S4 DE VIL = 0.8V S1, S2, S3, S4 VOY or VOZ = 0V, VOD = 0V 40 nA -3 µA -20 nA 10 µA -10 mA VOD = 600mV 1.5 ±25 VO - 0V or VCC 1.5 ±25 VCC = 0V, VO = 3.6V 1.5 ±40 S0 - S3, 1DE - 4DE mA 3 nA pF 8 Note: 1. All typical values are at 25°C and with a 3.3 supply 5 PS8485D 09/22/04 PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch Differential Receiver to Driver Switching Characteristics Over Recommended Operating Conditions (unless otherwise noted) Symbol Parameter Test Condition Min. Typ.(1) Max. tPLH Differential propagation delay, low-to-high 4.0 6.0 tPHL Differential propagation delay, high-to-low 4.0 6.0 tsk(p) Pulse skew ( | tPHL = tPLH | ) 0.25 0.3 tr Transition, low-to-high 1.0 1.5 LVB044 0.8 1.3 tf Transition, high-to-low LV044 1.0 1.5 LVB044 0.8 1.3 tPHZ Propagation delay time, high-level-to-high-impedence output 4.0 10 tPLZ Propagation delay time, low-level-to-high-impedance output 4.3 10 tPZH Propagation delay time, high-impedence to high-level output 3.0 10 tPZL Propagation delay time, high-impdeence tolow-level output 2.0 10 - 95 - 95 - 95 - 95 LV044 CL = 10pF tPHL_R1_Dx tPLH_R1_Dx tPHL_R2_Dx Channel-tochannel skew, receiver to driver(2) tPLH_R2_Dx Units ns ps Notes: 1. All typical values are at 25°C and with a 3.3 supply 2. These parametric values are measured over supply voltage and temperature ranges recommended for the device 6 PS8485D 09/22/04 PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch Parameter Measurement Information DE Y A Pulse Generator R B D Input (see Note A) VI(B) 1.4 V VI(A) 1V VOD Z RL (see Note B) CL = 10 pF (2 Places) (see Note C) 100% 80% VOD 0 20% 0% tf tr Notes: A. All input pulses are supplied by a generator having the following characteristics: tr or tf ≤ 1ns, pulse repetition rate (PRR) - 50 Mpps, pulse width = 10 ±0.2ns. B. RL = 100Ω or 50Ω ±1%. C. CL includes instrumentation and fixture capacitance within 6mm of the D.U.T. D. The measurement of VOC(PP) is made on test equipment with a –3dB bandwidth of at least 300 MHz. Figure 3. Test Circuit and Voltage Definitions for the Differential Output Signal DE Y A Pulse Generator R B RL (see Note B) (2 Places) D Input (see Note A) Z 1.4 V VI(A) 1V VOC(PP) (see Note D) VOC CL = 10 pF (2 Places) (see Note C) VI(B) VOC(SS) VCC Notes: A. All input pulses are supplied by a generator having the following characteristics: tr or tf ≤ 1ns, pulse repetition rate (PRR) - 50 Mpps, pulse width = 10 ±0.2ns. B. RL = 100Ω or 50Ω ±1%. C. CL includes instrumentation and fixture capacitance within 6mm of the D.U.T. D. The measurement of VOC(PP) is made on test equipment with a –3dB bandwidth of at least 300 MHz. Figure 4. Test Circuit and Definitions for the Driver Common-Mode Output Voltage 7 PS8485D 09/22/04 PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch DE A Pulse Generator Y R D RL (see Note A) Z B 10 pF 10 pF VIB 1.4 V 0-V Differential 1.2-V CM 1V VIA tPLH tPHL VOZ 1.4 V 0-V Differential 1.2-V CM 1V VOY VOY – VOZ 80% 0-V Differential 20% tr tf Notes: A. RL = 100Ω or 50Ω ±1% B. All input pulses are supplies by a generator having the following characteristics: pulse repetition rate (PPR) = 50 Mpps, pulse width = 10 ±0.2ns. Figure 5. Differential Receiver to Driver Propagation Delay and Driver Transition Time Waveforms 8 PS8485D 09/22/04 PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch DE 1 V or 1.4 V A R 1.2 V RL/2 (see Note A) Y 1.2 V D B Z RL/2 (see Note A) 2V DE 1.4 V 0.8 V tPZH tPHZ ≈ 1.4 V VOY or VOZ 1.25 V 1.2 V tPZL tPLZ 1.2 V 1.15 V VOY or VOZ ≈1 V Notes: A. RL = 100 Ω or 50 Ω ±1% B. All input pulses are supplied by a generator having the following characteristics: pulse repetition rate (PRR) = 0.5 Mpps, pulse width = 500 ±10ns. Figure 6. Enable and Disable Timing Circuit 9 PS8485D 09/22/04 PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch Typical Characteristics PI90LV044 3.5 3 2.5 2 1.5 1 .5 0 –4 –3 –2 LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT 4 VCC = 3.3 V TA = 25°C V OL – Low-Level Output Voltage – V V OH – High-Level Ouptut Voltage – V PI90LV044 HIGH-LEVEL OUTPUT VOLTAGE vs HIGH-LEVEL OUTPUT CURRENT –1 VCC = 3.3 V TA = 25°C 3 2 1 0 0 0 IOH – High-Level Output Current – mA PI90LVB044 2.5 2 1.5 1 .5 0 –8 –6 –4 –2 LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT 4 VCC = 3.3 V TA = 25°C V OL – Low-Level Output Voltage – V V OH – High-Level Output Voltage – V PI90LVB044 HIGH-LEVEL OUTPUT VOLTAGE vs HIGH-LEVEL OUTPUT CURRENT 3 6 Figure 8 Figure 7 3.5 4 2 IOL – Low-Level Output Current – mA VCC = 3.3 V TA = 25°C 3 2 1 0 0 IOH – High-Level Output Current – mA 0 2 4 6 8 10 12 IOL – Low-Level Output Current – mA Figure 10 Figure 9 10 PS8485D 09/22/04 PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch Packaging Mechanical: 28-Pin QSOP (Q) 28 .008 0.20 MIN. 0.150 0.157 3.81 3.99 .008 .013 0.20 0.33 Guage Plane .010 0.254 1 0˚-6˚ .016 .035 0.41 0.89 Detail A .041 1.04 REF .386 9.804 .394 10.009 .033 REF 0.84 .015 x 45˚ 1.35 .053 1.75 .069 Detail A .007 0.178 .010 0.254 SEATING PLANE .008 0.203 .012 0.305 .025 BSC 0.635 0.41 .016 1.27 .050 .004 0.101 .010 0.254 .228 .244 5.79 6.19 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS Packaging Mechanical: 28-Pin TSSOP (L) 28 .169 .177 4.3 4.5 .004 .008 1 .378 .386 9.6 9.8 0.45 .018 0.75 .030 .252 BSC 6.4 .047 1.20 Max SEATING PLANE .0256 BSC 0.65 .007 .012 0.19 0.30 0.09 0.20 .002 .006 X.XX DENOTES CONTROLLING X.XX DIMENSIONS IN MILLIMETERS 0.05 0.15 11 PS8485D 09/22/04 PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch Ordering Information Ordering Code Package Code Package Type PI90LV044Q Q 28-Pin 150-mil QSOP PI90LV044QE Q Pb-free & Green, 28-Pin 150-mil QSOP PI90LV044L L 28-pin 170-mil TSSOP PI90LV044LE L Pb-free & Green, 28-pin 170-mil TSSOP PI90LVB044Q Q 28-Pin 150-mil QSOP PI90LVB044QE Q Pb-free & Green, 28-Pin 150-mil QSOP PI90LVB044L L 28-pin 170-mil TSSOP PI90LVB044LE L Pb-free & Green, 28-pin 170-mil TSSOP Notes: 1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ 2. Number of Transistors = TBD Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com 12 PS8485D 09/22/04