PI2PCIE412-D Enhanced, 1.8V, PCI Express Compliant, 4-Differential Channel, 2:1 Mux/DeMux Switch, w/ Single Enable Features Description • • • • • • • • • Pericom Semiconductor’s PI2PCIE412-D is an 8 to 4 differential channel multiplexer/demultiplexer switch. This solution can switch 2 full PCI Express lanes to one of two locations. Using a unique design technique, Pericom has been able to minimize the impedance of the switch such that the attenuation observed through the switch is negligible. The unique design technique also offers a layout targeted for PCI Express signals, which minimizes the channel to channel skew as well as channel to channel crosstalk as required by the PCI Express specification. 4 Differential Channel, 2:1 Mux/DeMux PCI Express signal compliance Low Bit-to-Bit Skew , 10ps max (between '+' and '-' bits) Low Crosstalk: -65dB@10 MHz Low Off Isolation: -65dB@10 MHz VCC Operating Range: +1.5V to +2.0V ESD Tolerance: 8kV HBM I/O; 2kV HBM select pin Low channel-to-channel skew, 35ps max Packaging (Pb-free & Green): – 42-contact, TQFN (ZH42) Application Switch a PCI-Express lane output between two PCI Express lane inputs. Pin Description Block Diagram VDD GND VDD GND 0B1 A0 A1 A2 A3 1B1 2B1 3B1 GND A0 A1 GND VDD A2 A3 VDD SEL GND A4 A5 VDD GND A6 A7 GND 0B2 1B2 2B2 3B2 4B1 5B1 6B1 7B1 A4 A5 A6 A7 4B2 5B2 6B2 7B2 SEL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 42 41 40 39 GND 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 0B1 1B1 2B1 3B1 0B2 1B2 2B2 3B2 VDD 4B1 5B1 6B1 7B1 4B2 5B2 6B2 7B2 18 19 20 21 Function SEL AN to NB1 L AN to NB2 H VDD GND VDD GND Truth Table 1 PS8788B 01/23/06 PI2PCIE412-D Enhanced, 1.8V, PCI Express Compliant, 4-Differential Channel, 2:1 Mux/DeMux Switch Maximum Ratings (Above which useful life may be impaired. For user guidelines, not tested.) Storage Temperature ....................................................–65°C to +150°C Supply Voltage to Ground Potential ................................–0.5V to +2.5V DC Input Voltage ...............................................................–0.5V to VCC DC Output Current ....................................................................... 120mA Power Dissipation ........................................................................... 0.5W Note: Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. DC Electrical Characteristics for Switching over Operating Range (TA = –40°C to +85°C, VCC = 1.5V to 2.0V) Paramenter Description Test Conditions(1) Min Typ(2) Max Units 0.35 x VCC V VIH Input HIGH Voltage Guaranteed HIGH level 0.65 x VCC VIL Input LOW Voltage Guaranteed LOW level –0.5 VIK Clamp Diode Voltage VCC = Max., IIN = –18mA IIH Input HIGH Current VCC = Max., VIN = VCC ±5 IIL Input LOW Current VCC = Max., VIN = GND ±5 Power Supply Characteristics Parameters ICC Test Conditions(1) Description Quiescent Power Supply Current –0.7 Min. –1.2 Typ.(2) VCC = Max., VIN = GND or VCC Max. 200 µA Units µA Dynamic Electrical Characteristics Over the Operating Range (TA= -40º to +85ºC, VCC = 1.8V±10%, GND=0V) Parameter Description Test Conditions Min. Typ.(2) XTALK Crosstalk See Fig. 1 for Measurement Setup, f = 10 MHz -65 OIRR OFF Isolation See Fig. 2 for Measurement Setup, f = 10 MHz -65 Max. Units dB Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 1.8V, TA = 25°C ambient and maximum loading. 2 PS8788B 01/23/06 PI2PCIE412-D Enhanced, 1.8V, PCI Express Compliant, 4-Differential Channel, 2:1 Mux/DeMux Switch ������� � � � �������� ������������ ������ ��� ����� ������ ������ ��� ���� Fig 1. Crosstalk Setup ������� � � � �������� ������ ������������ ������ ������ ��� ���� Fig 2. Off-isolation setup 3 PS8788B 01/23/06 PI2PCIE412-D Enhanced, 1.8V, PCI Express Compliant, 4-Differential Channel, 2:1 Mux/DeMux Switch Fig 3. Crosstalk Fig 4. Off Isolation 4 PS8788B 01/23/06 PI2PCIE412-D Enhanced, 1.8V, PCI Express Compliant, 4-Differential Channel, 2:1 Mux/DeMux Switch Switching Characteristics (TA= -40º to +85ºC, VCC = 1.8V±10%) Paramenter Description Min. Max. Units tPZH, tPZL tPHZ, tPLZ tb-b Line Enable Time - SEL to AN, BN 0.5 8.0 Line Disable Time - SEL to AN, BN 0.5 4.0 Bit-to-bit skew within the same differential pair 10 ps tch-ch Channel-to-channel skew 35 ps ns Test Circuit for Electrical Characteristics(1-5) 2 x VCC VCC 200-ohm Pulse Generator VIN VOUT D.U.T 4pF CL RT 200-ohm Notes: 1. CL = Load capacitance: includes jig and probe capacitance. 2. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator 3. Output 1 is for an output with internal conditions such that the output is low except when disabled by the output control. output 2 is for an output with internal conditions such that the output is high except when disabled by the output control. 4. All input impulses are supplied by generators having the following characteristics: PRR ≤ MHz, ZO = 50Ω, tR ≤ 2.5ns, tF ≤ 2.5ns. 5. The outputs are measured one at a time with one transition per measurement. Switching Waveforms ��� ��� ����� ����� ��� �������� ���� ���� ������ ���� ����������� ���� ���� ����������� ������ ��� ��� ���� �������� Voltage Waveforms Enable and Disable Times Switch Positions Test Switch tPLZ, tPZL (output on B-side) 2 x VCC tPHZ, tPZH (output on B-side) GND Prop Delay Open 5 PS8788B 01/23/06 PI2PCIE412-D Enhanced, 1.8V, PCI Express Compliant, 4-Differential Channel, 2:1 Mux/DeMux Switch Test Circuit for Dynamic Electrical Characteristics ��������������������� �� �� �� ������������ �������� Applications Information Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd PCI Express Application Specific Measurements and Test Set-up Motherboard TP1 The trace on test card is 22.5" or 13.7” 50-ohm termination to ground TP2 Root Complex Chipset + PCI-Express Drivers One pair of the upstream Tx signal 4.5" trace d r oa r Pe – Capacitors m ico tb tes PI2PCIE412-D PCI-Express 1x Connector Figure 5: Test Setup 6 PS8788B 01/23/06 PI2PCIE412-D Enhanced, 1.8V, PCI Express Compliant, 4-Differential Channel, 2:1 Mux/DeMux Switch Figure 6: The worst non-transition signal eye (left) and the worst transition signal eye (right) of the PCI-SIG compliance software test using PI2PCIE412-D + 22.5" test card Figure 7. The worst non-transition signal eye (left) and the worst transition signal eye (right) of the PCI-SIG compliance software test with no switch + w/ 22.5" test card 7 PS8788B 01/23/06 PI2PCIE412-D Enhanced, 1.8V, PCI Express Compliant, 4-Differential Channel, 2:1 Mux/DeMux Switch Figure 8: The worst non-transition signal eye (left) and the worst transition signal eye (right) of the PCI-SIG compliance software test using PI2PCIE412-D + 13.7" test card Figure 9: The worst non-transition signal eye (left) and the worst transition signal eye (right) of the PCI-SIG compliance software test with no switch + 13.7" test card 8 PS8788B 01/23/06 PI2PCIE412-D Enhanced, 1.8V, PCI Express Compliant, 4-Differential Channel, 2:1 Mux/DeMux Switch Packaging Mechanical: 42-Contact TQFN (ZH) Pin #1 Corner Pin #1 Corner 2.05±.05 0.80±0.04 0.5 9.0±0.10 7.55±.05 3.50±0.10 0.20 REF. 0.4±0.05 0.25±.05 0.6±.03 Ordering Information Ordering Code PI2PCIE412-DZHE Package Code Package Description ZH Pb-free & Green, 42-contact TQFN Notes: • Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ • "E" denotes Pb-free and Green • Adding an "X" at the end of the ordering code denotes tape and reel packaging Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com 9 PS8788B 01/23/06