DS90CR213MTD National Semiconductor, DS90CR213MTD Datasheet

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DS90CR213MTD

Manufacturer Part Number
DS90CR213MTD
Description
21-Bit Channel Link66 MHz
Manufacturer
National Semiconductor
Datasheet

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PrintDate=1998/01/07 PrintTime=09:53:21 28561 ds012888 Rev. No. 5 cmserv
© 1998 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
DS012888-27
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
Proof
<
DS90CR214
0.5 mW total)
<
610 mW)
www.national.com
DS012888-1
July 1997
1
1

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DS90CR213MTD Summary of contents

Page 1

... 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 DS90CR213 Order Number DS90CR213MTD See NS Package Number MTD48 TRI-STATE ® registered trademark of National Semiconductor Corporation. ...

Page 2

Pin Diagrams DS90CR213 Typical Application www.national.com PrintDate=1998/01/07 PrintTime=09:53:21 28561 ds012888 Rev. No. 5 cmserv DS012888-21 2 Proof DS90CR214 DS012888-22 DS012888-23 2 ...

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 −0. CMOS/TTL Output Voltage −0. LVDS Receiver Input Voltage −0. LVDS Driver Output Voltage − ...

Page 4

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

Page 5

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

Page 6

AC Timing Diagrams FIGURE 4. DS90CR213 (Transmitter) Input Clock Transition Time = 0V Note 8: Measurements at V diff Note 9: TCSS measured between earliest and latest LVDS edges. Note 10: TxCLK Differential Low High Edge FIGURE 5. DS90CR213 (Transmitter) ...

Page 7

AC Timing Diagrams (Continued) FIGURE 8. DS90CR213 (Transmitter) Clock In to Clock Out Delay FIGURE 9. DS90CR214 (Receiver) Clock In to Clock Out Delay FIGURE 10. DS90CR213 (Transmitter) Phase Lock Loop Set Time FIGURE 11. DS90CR214 (Receiver) Phase Lock Loop ...

Page 8

AC Timing Diagrams FIGURE 13. 21 Parallel TTL Data Inputs Mapped to LVDS Outputs (DS90CR283) www.national.com PrintDate=1998/01/07 PrintTime=09:53:22 28561 ds012888 Rev. No. 5 cmserv (Continued) FIGURE 12. Seven Bits of LVDS in Once Clock Cycle FIGURE 14. Transmitter Powerdown Delay ...

Page 9

AC Timing Diagrams (Continued) 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 Skew—Typically 10 ps–40 ps ...

Page 10

DS90CR213 Pin Description—Channel Link Transmitter Pin Name I/O No. PLL PLL GND I 2 LVDS LVDS GND I 3 DS90CR214 Pin Description—Channel Link Receiver Pin Name I/O No. RxIN RxIN− ...

Page 11

Applications Information ommended that the designer assess the tradeoffs of each application thoroughly to arrive at a reliable and economical cable solution. BOARD LAYOUT: To obtain the maximum benefit from the noise and EMI reductions of LVDS, attention should be ...

Page 12

Applications Information POWER SEQUENCING AND POWERDOWN MODE: Out- puts of the CHANNEL LINK transmitter remain in TRI-STATE until the power supply reaches 3V. Clock and data outputs will begin to toggle 10 ms after V the Powerdown pin is above ...

Page 13

THIS PAGE IS IGNORED IN THE DATABOOK PrintDate=1998/01/07 PrintTime=09:53:22 28561 ds012888 Rev. No. 5 cmserv 13 Proof 13 13 ...

Page 14

... Fax: +49 (0) 1 80-530 85 86 Response Group Email: europe.support@nsc.com Tel: 65-2544466 Deutsch Tel: +49 (0) 1 80-530 85 85 Fax: 65-2504466 English Tel: +49 (0) 1 80-532 78 32 Email: sea.support@nsc.com Français Tel: +49 (0) 1 80-532 93 58 Italiano Tel: +49 (0) 1 80-534 16 80 National Semiconductor Japan Ltd. Tel: 81-3-5620-6175 Fax: 81-3-5620-6179 Proof 14 ...

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