PI90LV024, PI90LVB024 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 (325 MHz) • Operates from a 3.3V Supply: –40°C to 85°C • Low Voltage Differential Signaling with Output Voltages of ±350mV into: – 100Ω load (PI90LV024) – 50Ω load Bus LVDS Signaling (PI90LVB024) • 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 400Mbit/s of 250mW • Packaging (Pb-free & Green Available): – 28-pin QSOP (Q) – 28-pin TSSOP (L) The PI90LV024 and PI90LVB024 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 650 Mbps. Block Diagram Pin Configuration S0/S1 1DE/2DE 1A/1B 1Y/1Z 2A/2B 2Y/2Z 3Y/3Z 3A/3B The LVDS standard provides a minimum differential output voltage magnitude of 247mV into a 100Ω load and receipt of 100mV signals with up to 1V of ground potential difference between a transmitter and receiver. The PI90LVB024 doubles the output drive current to achieve Bus LVDS signaling levels with a 50Ω load. The intended application of these devices is for loop-through and redundant channel switching for both point-to-point base-band (PI90LV024) and multipoint (PI90LVB024) data transmissions over controlled impedance media. The package pin assignments enables easy routing for applications requiring signal feedback. 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 GND 8 21 4B 4Y 9 20 4A 4Z 10 19 S3 4DE 11 18 3DE 4Y/4Z 4A/4B 3Z 12 17 S2 3Y 13 16 3A 3DE/4DE S2/S3 VCC 14 15 3B 1 PS8486B 08/19/04 PI90LV024, PI90LVB024 LVDS Dual 2x2 Crosspoint/Repeater Switch MUX Truth Table Input Output Function S3, S1 S2, S0 1Y/1Z - 3Y/3Z 2Y/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 2A/2B - 4A/4B Router 1 1 2A/2B - 4A/4B 1A/1B - 3A/3B 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 3DE/4DE S3/S2 3Y/3Z 3A/3B 4Y/4Z 4A /4B Cross Point Router Pass Through Router Router Options S1/S0 1DE/2DE 1A/1B 1Y/1Z 2A/2B 2Y/2Z 3DE/4DE S3/S2 3Y/3Z 3A/3B 4Y/4Z 4A/4B Splitter A Splitter B Splitter Options Figure 1. Possible Signal Routing 2 PS8486B 08/19/04 PI90LV024, PI90LVB024 LVDS Dual 2x2 Crosspoint/Repeater Switch Absolute Maximum Ratings Over Operating Free-Air Temperature(1) Supply Voltage Range, VCC(2)............................................................................. –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(3)............... 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-MaximumRated 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 Parameter Desctiption VCC Supply Voltage VIH High-Level Input Voltage VIL Low-Level Input Voltage | VID | S0 - S3, 1DE - 4DE Magnitude of Differential Input VIC Common-Mode Input Voltage (see fig 2) TA Operating Free-air temperature Min. Typ. Max. 3.0 3.3 3.6 Units 2 0.8 0.1 0.6 | VID | 2 2.4 - | VID | 2 V VCC -0.8 -40 3 85 PS8486B °C 08/19/04 PI90LV024, PI90LVB024 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+ Postive-going differential input voltage threshold VITH- Negative-going differential input voltage threshold II Input Current (A or B inputs) II(OFF) Power-off Input current (A or B inputs) Test Conditions VCM = 1.2V Typ. Max 100 -100 VI = 0V -2 VI = 2.4V -1.2 VCC = 0V 4 Min. Units mV -20 µA 20 PS8486B 08/19/04 PI90LV024, PI90LVB024 LVDS Dual 2x2 Crosspoint/Repeater Switch Receiver / Driver Electrical Characteristics Over Recommended Operating Conditions (unless otherwise noted) Symbol Parameter Test Conditions VOD Differential Output Voltage Magnitude ∆VOD Change in Differential Output Voltage Magnitude between Logic States VOC(SS) Steady-State Common-Mode Output Voltage ∆VOC(SS) Change in Steady-State Common-Mode Output Voltage between Logic States VOC(PP) Peak-to-peak common-mode output voltage ICC Supply Current DE IH High-Level Input Current IL Low-Level Input Current IOS Short Circuit Output Current IOZ High-Impedance Output Current IO(OFF) Power-Off Output Current CIN Input Capacitance S1, S2, S3, S4 DE S1, S2, S3, S4 RL = 100Ω (LV024) RL = 100Ω (LVB024) See Fig. 3 See Fig. 4 Min. Typ. Max 247 440 590 -50 50 1.062 1.375 -50 3 50 Units mV V mV 150 No Load 16 24 RL = 100Ω (LV024) 26 40 RL = 50Ω (LVB024) 42 54 Both Channels Disabled 6 12 VIH = 5V VIL = 0.8V 40 nA -3 µA -20 nA 10 µA VOY or VOZ = 0V -10 VOD = 0V -10 VOD = 600mV 1.5 ±25 VO - 0V or VCC 1.5 ±25 VCC - 0V, VO = 3.6V 1.5 ±40 3 S0 - S3, 1DE - 4DE mA mA nA pF 8 Note: 1. All typical values are at 25°C and with a 3.3V supply 5 PS8486B 08/19/04 PI90LV024, PI90LVB024 LVDS Dual 2x2 Crosspoint/Repeater Switch Differential Receiver to Driver Switching Characteristics Over Recommended Operating Conditions (unless otherwise noted) Symbol Test Conditions Parameter Min. Typ. 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 | ) 0.5 - tr Transistion, low-to-high 1.0 1.5 0.8 1.3 tf Transition, high-to-low LV024 1.0 1.5 LVB024 0.8 1.3 tPHZ Propagation delay time, high-level to high impedance output 4.0 10 tPLZ Propagation delat time, low-level to high impedance output 4.3 10 tPZH Propagation delat time, high-level to high impedance output 3.0 10 tPZL Propagation delat time, high-level to lowimpedance output 2.0 10 LV024 LVB024 CL = 10pF (see fig. 5) See fig. 6 tPHL_R1_DX tPLH_R1_DX tPHL_R2_DX Units ns 95 95 Channel-to-channel skew, receiver to driver(2) ps 95 tPLH_R2_DX 95 Notes: 1. All typical values are at 25°C and with a 3.3V supply 2. These parametric values are measured over supply voltage and temperature ranges recommended for the device 6 PS8486B 08/19/04 PI90LV024, PI90LVB024 LVDS Dual 2x2 Crosspoint/Repeater Switch Parameter Measurement Information �� � � ����� ��������� � � ����� ����� ����� ��� � ����� ���������� �� ��� � �� ����������� �� �� �������� ���������� ���������� �� ���� ��� ��� � ��� �� �� �� Figure 3. Test Circuit and Voltage Definitions for the Differential Output Signal Notes: 1. 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. 2. RL = 100Ω or 50Ω ±1%. 3. CL includes instrumentation and fixture capacitance within 6mm of the D.U.T. 4. 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 Notes: 1. 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. 2. RL = 100Ω or 50Ω ±1%. 3. CL includes instrumentation and fixture capacitance within 6mm of the D.U.T. 4. The measurement of VOC(PP) is made on test equipment with a –3dB bandwidth of at least 300 MHz. 7 PS8486B 08/19/04 PI90LV024, PI90LVB024 LVDS Dual 2x2 Crosspoint/Repeater Switch �� � ����� ��������� � � � �� ����������� �� � � ����� ����� ��� ����� ���������������� �������� ��� ��� � ��� � ��� ��� ����� ���������������� �������� ��� ��� ��� ���������������� ��� ��������� �� �� Figure 5. Differential Receiver to Driver Propagation Delay and Driver Transition Time Waveforms Notes: 1. RL = 100Ω or 50Ω ±1% 2. All input pulses are supplies by a generator having the following characteristics: pulse repetition rate (PPR) = 50 Mpps, pulse width = 10 ±0.2ns. 8 PS8486B 08/19/04 PI90LV024, PI90LVB024 LVDS Dual 2x2 Crosspoint/Repeater Switch �� ������������ � � ����� �� �� ���������� �� � ����� � � � �� �� ���������� �� ��� �� ����� ����� � ��� � ��� � ����� ������� ��� ������ ����� � ��� � ��� ����� ������ ������� ��� � ��� Figure 6. Enable and Disable Timing Circuit Notes: 1. RL = 100Ω or 50Ω ±1% 2. All input pulses are supplies by a generator having the following characteristics: pulse repetition rate (PPR) = 0.5 Mpps, pulse width = 500 ±10ns. 9 PS8486B 08/19/04 PI90LV024, PI90LVB024 LVDS Dual 2x2 Crosspoint/Repeater Switch Typical Characteristics ��������� ���������� �������� ��� ���� �� ����������� ������� ������� ��������� ��� ������� ������� ��� ���� �� ��� ������� ������� ������� � ����������� �� ������� � � �� ������������ ������� �������� ��� � �� ������������� ������� �������� ��� ��� ��� � ��� � ����������� �� ������� � � � �� � � �� �� �� �� � � ����������������� ������� �������� ���� � Figure 8 Figure 7 ���������� ���������� �������� ��� ���� �� ����������� ������� ������� ���������� ��� ������� ������� ��� ���� �� ��� ������� ������� ������� � ��� ����������� �� ������� � � �� ������������ ������� �������� ��� � �� ������������� ������� �������� ��� � � ��� ������������� ������� �������� ���� ��� � ��� � �� ����������� �� ������� � � � � � �� �� �� �� � � ����������������� ������� �������� ���� � � � � �� �� ��� ������������� ������� �������� ���� Figure 9 Figure 10 10 PS8486B 08/19/04 PI90LV024, PI90LVB024 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 Guage Plane .010 0.254 1 .008 .013 0.20 0.33 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 .004 0.101 .010 0.254 .008 0.203 .012 0.305 .025 BSC 0.635 0.41 .016 1.27 .050 .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 PS8486B 08/19/04 PI90LV024, PI90LVB024 LVDS Dual 2x2 Crosspoint/Repeater Switch Ordering Information Ordering Code Package Code Packaging Description PI90LV024Q Q 28-pin 150-mil SOIC PI90LV024QE Q Pb-free & Green, 28-pin 150-mil SOIC PI90LV024L L 28-pin 170-mil TSSOP PI90LV024LE L Pb-free & Green, 28-pin 170-mil TSSOP PI90LVB024Q Q 28-pin 150-mil SOIC PI90LVB024QE Q Pb-free & Green, 28-pin 150-mil SOIC PI90LVB024L L 28-pin 170-mil TSSOP PI90LVB024LE 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/ Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com 12 PS8486B 08/19/04