DS90CP22MX-8 National Semiconductor, DS90CP22MX-8 Datasheet

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DS90CP22MX-8

Manufacturer Part Number
DS90CP22MX-8
Description
2X2 800 Mbps LVDS Crosspoint Switch
Manufacturer
National Semiconductor
Datasheet

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© 2006 National Semiconductor Corporation
DS90CP22
2X2 800 Mbps LVDS Crosspoint Switch
General Description
DS90CP22 is a 2x2 crosspoint switch utilizing LVDS (Low
Voltage Differential Signaling) technology for low power, high
speed operation. Data paths are fully differential from input
to output for low noise generation and low pulse width dis-
tortion. The non-blocking design allows connection of any
input to any output or outputs. LVDS I/O enable high speed
data transmission for point-to-point interconnects. This de-
vice can be used as a high speed differential crosspoint, 2:1
mux, 1:2 demux, repeater or 1:2 signal splitter. The mux and
demux functions are useful for switching between primary
and backup circuits in fault tolerant systems. The 1:2 signal
splitter and 2:1 mux functions are useful for distribution of
serial bus across several rack-mounted backplanes.
The DS90CP22 accepts LVDS signal levels, LVPECL levels
directly or PECL with attenuation networks.
The individual LVDS outputs can be put into TRI-STATE by
use of the enable pins.
For more details, please refer to the Application Information
section of this datasheet.
Connection Diagrams
Order Number DS90CP22MT (TSSOP)
Order Number DS90CP22M-8 (SOIC)
DS101053
10105305
Features
n Low jitter 800 Mbps fully differential data path
n 65 ps (typ) of pk-pk jitter with PRBS = 2
n Single +3.3 V Supply
n Less than 330 mW (typ) total power dissipation
n Non-blocking "’Switch Architecture"’
n Balanced output impedance
n Output channel-to-channel skew is 35 ps (typ)
n Configurable as 2:1 mux, 1:2 demux, repeater or 1:2
n LVDS receiver inputs accept LVPECL signals
n Fast switch time of 1.2ns (typ)
n Fast propagation delay of 1.3ns (typ)
n Receiver input threshold
n Available in 16 lead TSSOP and SOIC packages
n Inter-operates with ANSI/TIA/EIA-644-1995 LVDS
n Operating Temperature: −40˚C to +85˚C
Diff. Output Eye-Pattern in 1:2 split mode
pattern at 800 Mbps
signal splitter
standard
V
ID
Conditions: 3.3 V, PRBS = 2
= 300mV, V
CM
= +1.2 V, 200 ps/div, 100 mV/div
<
±
100 mV
23
−1 data pattern,
23
−1 data
February 2006
www.national.com
@
800 Mbps
10105310

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DS90CP22MX-8 Summary of contents

Page 1

... For more details, please refer to the Application Information section of this datasheet. Connection Diagrams Order Number DS90CP22M-8 (SOIC) Order Number DS90CP22MT (TSSOP) © 2006 National Semiconductor Corporation Features n Low jitter 800 Mbps fully differential data path (typ) of pk-pk jitter with PRBS = 2 pattern at 800 Mbps n Single +3 ...

Page 2

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage ( CMOS/TTL Input Voltage (EN0, EN1, SEL0, SEL1) LVDS Receiver Input Voltage (IN+, IN−) LVDS Driver Output Voltage (OUT+, OUT−) ...

Page 3

AC Electrical Characteristics Over recommended operating supply and temperature ranges unless otherwise specified (Note 4) Symbol Parameter T Input to SEL Setup Time, Figures 1, 2 SET (Note 5) T Input to SEL Hold Time, Figures 1, 2 HOLD (Note ...

Page 4

AC Timing Diagrams FIGURE 1. Input-to-Select rising edge setup and hold times and mux switch time FIGURE 2. Input-to-Select falling edge setup and hold times and mux switch time FIGURE 3. Output active to TRI-STATE and TRI-STATE to active output ...

Page 5

AC Timing Diagrams (Continued) FIGURE 6. Propagation Delay Low-to-High and High-to-Low FIGURE 7. Output Channel-to-Channel Skew in 1:2 splitter mode FIGURE 4. LVDS Output Load FIGURE 5. LVDS Output Transition Time 10105307 10105308 5 10105306 10105309 www.national.com ...

Page 6

DS90CP22 Pin Descriptions Pin Name # of Pin IN OUT+ 2 OUT - SEL 2 GND Application Information MODES OF OPERATION The DS90CP22 provides three modes of ...

Page 7

Block Diagram SEL0 Note low high EN0 = EN1 = 1 for enable Typical Performance Characteristics Diff. Output Voltage (V Function Table SEL1 OUT0 OUT1 0 0 IN0 IN0 0 1 IN0 IN1 1 0 IN1 ...

Page 8

Typical Performance Characteristics www.national.com (Continued) Peak-to-Peak Output Jitter +0.4V vs. VID CM Peak-to-Peak Output Jitter +1.2V vs. VID CM Peak-to-Peak Output Jitter +1.6V vs. VID CM 8 10105312 10105313 10105314 ...

Page 9

Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead (4.4mm Wide) Molded Thin Shrink Small Outline Package, JEDEC Order Number DS90CP22MTX (Tape and Reel) Order Number DS90CP22M-8 See NS Package Number M16A Order Number DS90CP22MT See NS Package Number MTC16 9 ...

Page 10

... BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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