DS10CP152EVK/NOPB - NATIONAL SEMICONDUCTOR

DS10CP152

March 5, 2009

1.5 Gbps 2X2 LVDS Crosspoint Switch

General Description

The DS10CP152 is a 1.5 Gbps 2x2 LVDS crosspoint switch

optimized for high-speed signal routing and switching over

lossy FR-4 printed circuit board backplanes and balanced ca-

bles. Fully differential signal paths ensure exceptional signal

integrity and noise immunity. The non-blocking architecture

allows connections of any input to any output or outputs.

Wide input common mode range allows the switch to accept

signals with LVDS, CML and LVPECL levels; the output levels

are LVDS. A very small package footprint requires a minimal

space on the board while the flow-through pinout allows easy

board layout. Each differential input and output is internally

terminated with a 100Ω resistor to lower device return losses,

reduce component count and further minimize board space.

Features

■DC - 1.5 Gbps low jitter, low skew, low power operation

■Pin configurable, fully differential, non-blocking

architecture

■Wide Input Common Mode Voltage Range allows DC-

coupled interface to LVDS, CML and LVPECL drivers

■On-chip 100Ω input and output termination minimizes

insertion and return losses, reduces component count and

minimizes board space

■7 kV ESD on LVDS I/O pins protects adjoining

components

■Small SOIC-16 space saving package

Applications

■High-speed channel select applications

■Clock and data buffering and muxing

■SD/HD SDI Routers

Typical Application

30007903

DS10CP152 1.5 Gbps 2X2 LVDS Crosspoint Switch

Ordering Code

NSID Function

DS10CP152TMA 2x2 Crosspoint Switch

Block Diagram

30007901

Connection Diagram

30007952

DS10CP152 Pin Diagram

Pin Descriptions

Pin Name Pin

Number

I/O, Pin

DescriptionTy

IN0+, IN0- ,

IN1+, IN1-

3, 4,

6, 7

I, LVDS Inverting and non-inverting high speed LVDS input pins.

OUT0+, OUT0-,

OUT1+, OUT1-

14, 13,

11, 10

O, LVDS Inverting and non-inverting high speed LVDS output pins.

SEL1, SEL0 1, 2 I, LVCMOS Switch configuration pins.

EN0, EN1 16, 15 I, LVCMOS Output enable pins.

NC 8, 9 NC "NO CONNECT" pins.

VDD 5 Power Power supply pin.

GND 12 Power Ground pin.

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DS10CP152

Absolute Maximum Ratings (Note 4)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Supply Voltage −0.3V to +4V

LVCMOS Input Voltage −0.3V to (VCC + 0.3V)

LVDS Input Voltage −0.3V to +4V

LVDS Differential Input Voltage 0V to 1V

LVDS Output Voltage −0.3V to (VCC + 0.3V)

LVDS Differential Output Voltage 0V to 1V

LVDS Output Short Circuit Current

Duration 5 ms

Junction Temperature +150°C

Storage Temperature Range −65°C to +150°C

Lead Temperature Range

Soldering (4 sec.) +260°C

Maximum Package Power Dissipation at 25°C

M16A Package 1.72W

Derate M16A Package 13.75 mW/°C above +25°C

Package Thermal Resistance

θJA +72.7°C/W

θJC +41.2°C/W

ESD Susceptibility

HBM (Note 1) ≥7 kV

MM (Note 2) ≥250V

CDM (Note 3) ≥1250V

Note 1: Human Body Model, applicable std. JESD22-A114C

Note 2: Machine Model, applicable std. JESD22-A115-A

Note 3: Field Induced Charge Device Model, applicable std.

JESD22-C101-C

Recommended Operating

Conditions

Min Typ Max Units

Supply Voltage (VCC) 3.0 3.3 3.6 V

Receiver Differential Input

Voltage (VID)

0 1 V

Operating Free Air

Temperature (TA)

−40 +25 +85 °C

DC Electrical Characteristics

Over recommended operating supply and temperature ranges unless otherwise specified. (Notes 5, 6, 7)

Symbol Parameter Conditions Min Typ Max Units

LVCMOS DC SPECIFICATIONS

VIH High Level Input Voltage 2.0 VDD V

VIL Low Level Input Voltage GND 0.8 V

IIH High Level Input Current VIN = 3.6V

VCC = 3.6V

40 175 250 μA

IIL Low Level Input Current VIN = GND

VCC = 3.6V

±1 ±10 μA

VCL Input Clamp Voltage ICL = −18 mA, VCC = 0V −0.9 −1.5 V

LVDS INPUT DC SPECIFICATIONS

VID Input Differential Voltage 0 1 V

VTH Differential Input High Threshold VCM = +0.05V or VCC-0.05V 0 +100 mV

VTL Differential Input Low Threshold −100 0 mV

VCMR Common Mode Voltage Range VID = 100 mV 0.05 VCC -

0.05

IIN Input Current VIN = 3.6V or 0V

VCC = 3.6V or 0V

±1 ±10 μA

CIN Input Capacitance Any LVDS Input Pin to GND 1.7 pF

RIN Input Termination Resistor Between IN+ and IN- 100 Ω

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DS10CP152

Symbol Parameter Conditions Min Typ Max Units

LVDS OUTPUT DC SPECIFICATIONS

VOD Differential Output Voltage

RL = 100Ω

250 350 450 mV

ΔVOD Change in Magnitude of VOD for Complimentary

Output States -35 35 mV

VOS Offset Voltage

RL = 100Ω

1.05 1.2 1.375 V

ΔVOS Change in Magnitude of VOS for Complimentary

Output States -35 35 mV

IOS Output Short Circuit Current (Note 8) OUT to GND -23 -55 mA

OUT to VCC 8 55 mA

COUT Output Capacitance Any LVDS Output Pin to GND 1.2 pF

ROUT Output Termination Resistor Between OUT+ and OUT- 100 Ω

SUPPLY CURRENT

ICC Supply Current EN0 = EN1 = H 58 70 mA

ICCZ Outputs Powered Down Supply Current EN0 = EN1 = L 25 30 mA

Note 4: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur, including inoperability and degradation of device reliability

and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or other conditions beyond those indicated in

the Recommended Operating Conditions is not implied. The Recommended Operating Conditions indicate conditions at which the device is functional and the

device should not be operated beyond such conditions.

Note 5: The Electrical Characteristics tables list guaranteed specifications under the listed Recommended Operating Conditions except as otherwise modified

or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and are not guaranteed.

Note 6: Current into device pins is defined as positive. Current out of device pins is defined as negative. All voltages are referenced to ground except VOD and

ΔVOD.

Note 7: Typical values represent most likely parametric norms for VCC = +3.3V and TA = +25°C, and at the Recommended Operation Conditions at the time of

product characterization and are not guaranteed.

Note 8: Output short circuit current (IOS) is specified as magnitude only, minus sign indicates direction only.

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DS10CP152

AC Electrical Characteristics

Over recommended operating supply and temperature ranges unless otherwise specified. (Notes 9, 10)

Symbol Parameter Conditions Min Typ Max Units

LVDS OUTPUT AC SPECIFICATIONS

tPLHD Differential Propagation Delay Low to

High (Note 11) RL = 100Ω

440 650 ps

tPHLD Differential Propagation Delay High to

Low (Note 11)

400 650 ps

tSKD1 Pulse Skew |tPLHD − tPHLD|

(Notes 11, 12)

40 120 ps

tSKD2 Channel to Channel Skew

(Notes 11, 13)

25 60 ps

tSKD3 Part to Part Skew

(Notes 11, 14)

45 190 ps

tLHT Rise Time (Note 11) RL = 100Ω 170 350 ps

tHLT Fall Time (Note 11) 170 350 ps

tON Output Enable Time 5 20 μs

tOFF Output Disable Time 3 12 ns

tSEL Select Time 3 12 ns

JITTER PERFORMANCE (Note 11)

tRJ1

Random Jitter (RMS Value)

VID = 350 mV

VCM = 1.2V

Clock (RZ)

135 MHz 0.5 1.2 ps

tRJ2 311 MHz 0.5 1.2 ps

tRJ3 503 MHz 0.5 1.2 ps

tRJ4 750 MHz 0.5 1.2 ps

tDJ1

Deterministic Jitter

(Peak-to-Peak Value )

VID = 350 mV

VCM = 1.2V

Clock (RZ)

270 Mbps 9 38 ps

tDJ2 622 Mbps 7 36 ps

tDJ3 1.06 Gbps 7 34 ps

tDJ4 1.5 Gbps 9 35 ps

tTJ1

Total Jitter (Peak to Peak Value)

VID = 350 mV

VCM = 1.2V

PRBS-23 (NRZ)

270 Mbps 0.01 0.03 UIP-P

tTJ2 622 Mbps 0.01 0.04 UIP-P

tTJ3 1.06 Gbps 0.01 0.05 UIP-P

tTJ4 1.5 Gbps 0.01 0.07 UIP-P

Note 9: The Electrical Characteristics tables list guaranteed specifications under the listed Recommended Operating Conditions except as otherwise modified

or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and are not guaranteed.

Note 10: Typical values represent most likely parametric norms for VCC = +3.3V and TA = +25°C, and at the Recommended Operation Conditions at the time of

product characterization and are not guaranteed.

Note 11: Specification is guaranteed by characterization and is not tested in production.

Note 12: tSKD1, |tPLHD − tPHLD|, Pulse Skew, is the magnitude difference in differential propagation delay time between the positive going edge and the negative

going edge of the same channel.

Note 13: tSKD2, Channel to Channel Skew, is the difference in propagation delay (tPLHD or tPHLD) among all output channels in Broadcast mode (any one input to

all outputs).

Note 14: tSKD3, Part to Part Skew, is defined as the difference between the minimum and maximum differential propagation delays. This specification applies to

devices at the same VCC and within 5°C of each other within the operating temperature range.

Note 15: Measured on a clock edge with a histogram and an acummulation of 1500 histogram hits. Input stimulus jitter is subtracted geometrically.

Note 16: Tested with a combination of the 1100000101 (K28.5+ character) and 0011111010 (K28.5- character) patterns. Input stimulus jitter is subtracted

algebraically.

Note 17: Measured on an eye diagram with a histogram and an acummulation of 3500 histogram hits. Input stimulus jitter is subtracted.

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DS10CP152

DC Test Circuits

30007920

FIGURE 1. Differential Driver DC Test Circuit

AC Test Circuits and Timing Diagrams

30007921

FIGURE 2. Differential Driver AC Test Circuit

30007922

FIGURE 3. Propagation Delay Timing Diagram

30007923

FIGURE 4. LVDS Output Transition Times

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DS10CP152

Functional Description

The DS10CP152 is a 1.5 Gbps 2x2 LVDS digital crosspoint

switch optimized for high-speed signal routing and switching

over lossy FR-4 printed circuit board backplanes and bal-

anced cables.

TABLE 1. Switch Configuration Truth Table

SEL1 SEL0 OUT1 OUT0

0 0 IN0 IN0

0 1 IN0 IN1

1 0 IN1 IN0

1 1 IN1 IN1

TABLE 2. Output Enable Truth Table

EN1 EN0 OUT1 OUT0

0 0 Disabled Disabled

0 1 Disabled Enabled

1 0 Enabled Disabled

1 1 Enabled Enabled

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DS10CP152

Input Interfacing

The DS10CP152 accepts differential signals and allows sim-

ple AC or DC coupling. With a wide common mode range, the

DS10CP152 can be DC-coupled with all common differential

drivers (i.e. LVPECL, LVDS, CML). The following three fig-

ures illustrate typical DC-coupled interface to common differ-

ential drivers. Note that the DS10CP152 inputs are internally

terminated with a 100Ω resistor.

30007931

Typical LVDS Driver DC-Coupled Interface to an DS10CP152 Input

30007932

Typical CML Driver DC-Coupled Interface to an DS10CP152 Input

30007933

Typical LVPECL Driver DC-Coupled Interface to an DS10CP152 Input

Output Interfacing

The DS10CP152 outputs signals compliant to the LVDS stan-

dard. Its outputs can be DC-coupled to most common differ-

ential receivers. The following figure illustrates typical DC-

coupled interface to common differential receivers and

assumes that the receivers have high impedance inputs.

While most differential receivers have a common mode input

range that can accomodate LVDS compliant signals, it is rec-

ommended to check respective receiver's data sheet prior to

implementing the suggested interface implementation.

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DS10CP152

30007934

Typical DS10CP152 Output DC-Coupled Interface to an LVDS, CML or LVPECL Receiver

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DS10CP152

Typical Performance Characteristics

30007960

A 270 Mbps NRZ PRBS-7 After 2"

Differential FR-4 Stripline

V:100 mV / DIV, H:500 ps / DIV

30007961

A 622 Mbps NRZ PRBS-7 After 2"

Differential FR-4 Stripline

V:100 mV / DIV, H:200 ps / DIV

30007962

A 1.06 Gbps NRZ PRBS-7 After 2"

Differential FR-4 Stripline

V:100 mV / DIV, H:200 ps / DIV

30007963

A 1.5 Gbps NRZ PRBS-7 After 2"

Differential FR-4 Stripline

V:100 mV / DIV, H:100 ps / DIV

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DS10CP152

Physical Dimensions inches (millimeters) unless otherwise noted

Order Number DS10CP152TMA

NS Package Number M16A

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DS10CP152

Notes

DS10CP152 1.5 Gbps 2X2 LVDS Crosspoint Switch

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