1PS8871C 10/03/07
Features
• 8 Differential Channel SPST switch with Mux/DeMux option
• PCI Express Gen II performance
• Low Bit-to-Bit Skew: 10ps (between +/- signals)
• Low Crosstalk: -35dB @ 3.0 GHz
• Low Off Isolation: -26db @ 3.0 GHz
• VCC Operating Range: +1.5V to +2.0V
• ESD Tolerance >2kV HBM
• Packaging (Pb-free & Green): 42-contact TQFN (ZH42)
Description
Pericom semiconductor’s PI2PCIE2422 is an 8 to 4 channel
differential multiplexer/demultiplexer featuring 8-channel pass-
through. It supports two full PCI Express lanes at 5.0Gbps Gen
II performance.
With the select control input low Port A connects to Port B, and
Port C connects to port D for an 8-channel differential pass-though.
When the select control input is high Port A connects to Port D, and
Port B and Port C are in a high-impedance state. The mux/demux
function is between Port A and Ports B or D as determined by the
select input control.
Block Diagram
PI2PCIE2422
PCI Express Gen II, 2-lane (4-channel),
Differential Mux/Demux with Bypass
Truth Table
Function SEL
Ax = Bx
Cx = Dx L
Ax = Dx
B = C = Hi-Z H
A0
A1
SEL
C0
C1
B0
B1
D0
D1
A2
A3
C2
C3
B2
B3
D2
D3
A4
A5
C4
C5
B4
B5
D4
D5
A6
A7
C6
C7
B6
B7
D6
D7
Pin Diagram
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
B0
B1
D0
D1
B2
B3
D2
D3
VCC
B4
B5
D4
D5
B6
B7
D6
D7
A0
A1
C0
C1
A2
A3
C2
C3
SEL
A4
A5
C4
C5
A6
A7
C6
C7
18
19
20
21
VCC
GND
VCC
GND
VCC
GND
VCC
GND
42
41
40
39
07-0222
2PS8871C 10/03/07
PI2PCIE2422
PCI Express Gen II Compliant, 8-Differential
Channel Switch with 8:4 Mux/DeMux Option
Pin Description
Pin # Pin Name I/O Description
1, 2 A0, A1 I/O Signal I/O (typically a differential pair)
3, 4 C0, C1 I/O Signal I/O (typically a differential pair)
5, 6 A2, A3 I/O Signal I/O (typically a differential pair)
7, 8 C2, C3 I/O Signal I/O (typically a differential pair)
10, 11 A4, A5 I/O Signal I/O (typically a differential pair)
12, 13 C4, C5 I/O Signal I/O (typically a differential pair)
14, 15 A6, A7 I/O Signal I/O (typically a differential pair)
16, 17 C6, C7 I/O Signal I/O (typically a differential pair)
22, 23 D7, D6 I/O Signal I/O (typically a differential pair)
24, 25 B7, B6 I/O Signal I/O (typically a differential pair)
26, 27 D5, D4 I/O Signal I/O (typically a differential pair)
28,29 B5, B4 I/O Signal I/O (typically a differential pair)
31, 32 D3, D2 I/O Signal I/O (typically a differential pair)
33, 34 B3, B2 I/O Signal I/O (typically a differential pair)
35, 36 D1, D0 I/O Signal I/O (typically a differential pair)
37, 38 B1, B0 I/O Signal I/O (typically a differential pair)
9 SEL I Operation mode Select
(when SEL=0: A→B, C→D, when SEL=1: A→D, B & C=Hi-Z)
18, 20, 30, 40, 42 VCC Pwr 1.8V positive supply voltage
19, 21, 39, 41 GND Pwr Power ground
07-0222
3PS8871C 10/03/07
PI2PCIE2422
PCI Express Gen II Compliant, 8-Differential
Channel Switch with 8:4 Mux/DeMux Option
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 MAX I MUM
RAT INGS may cause permanent damage to the de vice. This
is a stress rating only and func tion al op er a tion of the device
at these or any other conditions above those indicated in the
operational sections of this spec i fi ca tion is not implied. Ex-
posure to absolute max i mum rating con di tions for extended
periods may affect re li abil i ty.
Maximum Ratings
(Above which useful life may be impaired. For user guide lines, not tested.)
DC Electrical Characteristics for Switching over Operating Range (TA = –40°C to +85°C, VCC = 1.5V to 2.0V)
Paramenter Description Test Conditions Min Typ(1) Max Units
VIH Input HIGH Voltage Guaranteed HIGH level 0.65 x VCC
VVIL Input LOW Voltage Guaranteed LOW level –0.5 0.35 x VCC
VIK Clamp Diode Voltage VCC = Max., IIN = –18mA –0.7 –1.2
IIH Input HIGH Current VCC = Max., VIN = VCC ±5 μA
IIL Input LOW Current VCC = Max., VIN = GND ±5
RON On Resistance VCC = Min., VIN = 1.3V, IIN = 40mA 10 Ohm
CON(AB) Capacitance on A/B, C/D VIN = 0, VCC = 1.8V 3.0 pF
Note:
1. Typical values are at VCC = 1.8V, TA = 25°C ambient and maximum loading.
Dynamic Electrical Characteristics Over the Operating Range (TA= -40º to +85ºC, VCC = 1.8V±10%, GND=0V)
Parameter Description Test Conditions Min. Typ.(1) Max. Units
XTALK Crosstalk See Fig. 1 for Measurement Setup, f = 3.00 GHz
f = 100 MHz
–35
–70
dBOIRR OFF Isolation See Fig. 2 for Measurement Setup, f = 3.00 GHz
f = 100 MHz
–26
–60
ILOSS Differential Inser-
tion Loss f = 3 GHz -3
BW Bandwidth (-3dB) 3.4 GHz
Notes:
1. Guaranteed by design. Typical values are at VCC = 1.8V, Ta = 25°C ambient and maximum loading.
Power Supply Characteristics
Parameters Description Test Conditions(1) Min. Typ.(2) Max. Units
ICC Quiescent Power Supply Current VCC = Max., VIN = GND or VCC 200 μA
Notes:
1. For Max. or Min. conditions, use appropriate value specifi ed under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC = 1.8V, TA = 25°C ambient and maximum loading.
07-0222
4PS8871C 10/03/07
PI2PCIE2422
PCI Express Gen II Compliant, 8-Differential
Channel Switch with 8:4 Mux/DeMux Option
Fig 1: Crosstalk Setup
Fig 2: Off-isolation setup
PI2PCIE2422
TR
S
HP11667A
50-ohm
50-ohm
50-ohm
HP4396B
100
-ohm
100
-ohm
TR
S
HP11667A
50-ohm
50-ohm
50-ohm
HP4396B
100
-ohm
PI2PCIE2422
07-0222
5PS8871C 10/03/07
PI2PCIE2422
PCI Express Gen II Compliant, 8-Differential
Channel Switch with 8:4 Mux/DeMux Option
Fig 3: Typical Crosstalk Plot from 1MHz to 6.0GHz, Vcc=1.8V, 25°C
Fig 4: Typical Off Isolation Plot from 1 MHz to 6.0 GHz, VCC = 1.8V, TA=25°C
07-0222
6PS8871C 10/03/07
PI2PCIE2422
PCI Express Gen II Compliant, 8-Differential
Channel Switch with 8:4 Mux/DeMux Option
Fig 5: Typical Insertion Loss Plot from 1MHz to 6.0GHz, Vcc=1.8V, 25C
07-0222
7PS8871C 10/03/07
PI2PCIE2422
PCI Express Gen II Compliant, 8-Differential
Channel Switch with 8:4 Mux/DeMux Option
Switching Characteristics (TA= -40º to +85ºC, VCC = 1.8V±10%)
Paramenter Description Min. Typ. Max. Units
tPZH, tPZL Line Enable Time - SEL to AN, BN0.5 8.0 ns
tPHZ, tPLZ Line Disable Time - SEL to AN, BN0.5 8.0
tb-b Bit-to-bit skew within same differential pair 4ps
tch-tch Channel-to-channel timing skew 35
R
T
4pF
C
L
V
CC
V
IN
V
OUT
200-ohm
200-ohm
2 x V
CC
Pulse
Generator D.U.T
Test Circuit for Electrical Characteristics(1)
Notes:
1. CL = Load capacitance: includes jig and probe capacitance.
2. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator
3. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 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.
Switch Positions
Test Switch
tPLZ, tPZL (output on B-side) 2 x VCC
tPHZ, tPZH (output on B-side) GND
Prop Delay Open
07-0222
8PS8871C 10/03/07
PI2PCIE2422
PCI Express Gen II Compliant, 8-Differential
Channel Switch with 8:4 Mux/DeMux Option
Test Circuit for Dynamic Electrical Characteristics
PI2PCIE2422
T1R1
S1
HP11667A
HP4396B or Equivalent
Switching Waveforms
Voltage Waveforms Enable and Disable Times
tPLZ
V
CC
/2 V
CC
/2
V
CC
VOH
0V
VOL
VCC/2
VCC/2
tPHZ
tPZL
tPZH
Output
Output
VOL
VOH
SEL
VOL + 0.15V
VOH 0.15V
07-0222
9PS8871C 10/03/07
PI2PCIE2422
PCI Express Gen II Compliant, 8-Differential
Channel Switch with 8:4 Mux/DeMux Option
Applications Information
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd
PCI Express Application Specifi c Measurements and Test Set-up
Figure 6: the test set-up for the PI2PCIE2422 eye test
Notes:
1. A modifi ed PI2PCIE2422 application board with 16-inch differential trace is used for Eye management.
2. Agilent N4902B BERT is used to generate a K28.5 pattern at 5 Gbps with 500mV single-end swing.
3. To create the P12PCIE2422-free test condition, the PI2PCIE2422 chip is removed and a wire is connected between the trace
and output
probe.
4. An Agilent Infi nuum 54855A is used and Serial Data Analysis software is ran to capture the Eye.
07-0222
10 PS8871C 10/03/07
PI2PCIE2422
PCI Express Gen II Compliant, 8-Differential
Channel Switch with 8:4 Mux/DeMux Option
Ordering Information
Ordering Code Package Code Package Description
PI2PCIE2422ZHE ZH Pb-free and Green 42-contact TQFN
Notes:
1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
2. E = Lead-free and green
2. X suffi x = tape and reel
Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com
DESCRIPTION: 42-contact Thin Fine Pitch Quad Flat No-Lead (TQFN)
PACKAGE CODE: ZH (ZH42)
DOCUMENT CONTROL #: PD-2035 REVISION: A
DATE: 03/10/06
07-0222
