DS90CR214MTDX National Semiconductor, DS90CR214MTDX Datasheet

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DS90CR214MTDX

Manufacturer Part Number
DS90CR214MTDX
Description
Manufacturer
National Semiconductor
Datasheet

Specifications of DS90CR214MTDX

Number Of Elements
3
Input Type
CMOS/TTL
Operating Supply Voltage (typ)
5V
Differential Output Voltage
450mV
Power Dissipation
1.98W
Operating Temp Range
-10C to 70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
48
Package Type
TSSOP
Number Of Receivers
3
Number Of Drivers
21
Lead Free Status / RoHS Status
Not Compliant
© 2005 National Semiconductor Corporation
DS90CR213/DS90CR214
21-Bit Channel Link—66 MHz
General Description
The DS90CR213 transmitter converts 21 bits of CMOS/TTL
data into three LVDS (Low Voltage Differential Signaling)
data streams. A phase-locked transmit clock is transmitted in
parallel with the data streams over a fourth LVDS link. Every
cycle of the transmit clock 21 bits of input data are sampled
and transmitted. The DS90CR214 receiver converts the
LVDS data streams back into 21 bits of CMOS/TTL data. At
a transmit clock frequency of 66 MHz, 21 bits of TTL data are
transmitted at a rate of 462 Mbps per LVDS data channel.
Using a 66 MHz clock, the data throughput is 1.386 Gbit/s
(173 Mbytes/s).
The multiplexing of the data lines provides a substantial
cable reduction. Long distance parallel single-ended buses
typically require a ground wire per active signal (and have
very limited noise rejection capability). Thus, for a 21-bit wide
data and one clock, up to 44 conductors are required. With
the Channel Link chipset as few as 9 conductors (3 data
pairs, 1 clock pair and a minimum of one ground) are
needed. This provides an 80% reduction in required cable
Block Diagrams
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
See NS Package Number MTD48
Order Number DS90CR213MTD
DS90CR213
DS012888
01288827
width, which provides a system cost savings, reduces con-
nector physical size and cost, and reduces shielding require-
ments due to the cable’s smaller form factor.
The 21 CMOS/TTL inputs can support a variety of signal
combinations. For example, 5 4-bit nibbles (byte + parity) or
2 9-bit (byte + 3 parity) and 1 control.
Features
n 66 MHz Clock Support
n Up to 173 Mbytes/s bandwidth
n Low power CMOS design (
n Power-down mode (
n Up to 1.386 Gbit/s data throughput
n Narrow bus reduces cable size and cost
n 290 mV swing LVDS devices for low EMI
n PLL requires no external components
n Low profile 48-lead TSSOP package
n Rising edge data strobe
n Compatible with TIA/EIA-644 LVDS Standard
See NS Package Number MTD48
Order Number DS90CR214MTD
<
DS90CR214
0.5 mW total)
<
610 mW)
www.national.com
August 2005
01288801

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DS90CR214MTDX Summary of contents

Page 1

... Order Number DS90CR213MTD See NS Package Number MTD48 TRI-STATE ® registered trademark of National Semiconductor Corporation. © 2005 National Semiconductor Corporation width, which provides a system cost savings, reduces con- nector physical size and cost, and reduces shielding require- ments due to the cable’s smaller form factor. ...

Page 2

Connection Diagrams DS90CR213 Typical Application www.national.com 01288821 2 DS90CR214 01288822 01288823 ...

Page 3

... 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 CMOS/TTL Output Voltage LVDS Receiver Input Voltage LVDS Driver Output Voltage LVDS Output Short Circuit Duration ...

Page 4

Electrical Characteristics Over recommended operating supply and temperature ranges unless otherwise specified. Symbol Parameter TRANSMITTER SUPPLY CURRENT Power Down RECEIVER SUPPLY CURRENT I Receiver Supply Current CCRW Worst Case I Receiver Supply Current CCRZ Power Down Note 1: “Absolute Maximum ...

Page 5

Receiver Switching Characteristics Over recommended operating supply and temperature ranges unless otherwise specified Symbol RSKM RxIN Skew Margin (Note 7) V RCOP RxCLK OUT Period (Figure 7 ) RCOH RxCLK OUT High Time (Figure 7 ) RCOL RxCLK OUT Low ...

Page 6

AC Timing Diagrams FIGURE 3. DS90CR214 (Receiver) CMOS/TTL Output Load and Transition Times FIGURE 4. DS90CR213 (Transmitter) Input Clock Transition Time Note 8: Measurements diff Note 9: TCSS measured between earliest and latest LVDS edges. Note ...

Page 7

AC Timing Diagrams (Continued) FIGURE 6. DS90CR213 (Transmitter) Setup/Hold and High/Low Times FIGURE 7. DS90CR214 (Receiver) Setup/Hold and High/Low Times FIGURE 8. DS90CR213 (Transmitter) Clock In to Clock Out Delay FIGURE 9. DS90CR214 (Receiver) Clock In to Clock Out Delay ...

Page 8

AC Timing Diagrams FIGURE 10. DS90CR213 (Transmitter) Phase Lock Loop Set Time FIGURE 11. DS90CR214 (Receiver) Phase Lock Loop Set Time FIGURE 12. Seven Bits of LVDS in Once Clock Cycle www.national.com (Continued) 8 01288813 01288814 01288815 ...

Page 9

AC Timing Diagrams (Continued) FIGURE 13. 21 Parallel TTL Data Inputs Mapped to LVDS Outputs FIGURE 14. Transmitter Powerdown Delay FIGURE 15. Receiver Powerdown Delay 9 01288816 01288817 01288818 www.national.com ...

Page 10

AC Timing Diagrams FIGURE 16. Transmitter LVDS Output Pulse Position Measurement SW — Setup and Hold Time (Internal Data Sampling Window) TCCS — Transmitter Output Skew RSKM ≥ Cable Skew (Type, Length) + Source Clock Jitter (Cycle to Cycle) Cable ...

Page 11

DS90CR213 Pin Description—Channel Link Transmitter Pin Name I/O No. PWR DOWN I 1 TTL level input. Assertion (low input) TRI-STATES the outputs, ensuring low current at power down Power supply pins for TTL inputs. CC GND I ...

Page 12

Applications Information the design considerations discussed here and listed in the supplemental application notes provide the subsystem com- munications designer with many useful guidelines rec- ommended that the designer assess the tradeoffs of each application thoroughly to arrive ...

Page 13

Applications Information FIGURE 19. CHANNEL LINK Decoupling Configuration CLOCK JITTER The CHANNEL LINK devices employ a PLL to generate and recover the clock transmitted across the LVDS interface. The width of each bit in the serialized LVDS data stream is ...

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Applications Information FIGURE 20. Single-Ended and Differential Waveforms www.national.com (Continued) 14 01288826 ...

Page 15

... 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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