SNLS209M November   2005  – January 2017 DS90C124 , DS90C241

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements - Serializer
    7. 6.7 Switching Characteristics - Serializer
    8. 6.8 Switching Characteristics - Deserializer
    9. 6.9 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Initialization and Locking Mechanism
      2. 8.3.2 Data Transfer
      3. 8.3.3 Resynchronization
      4. 8.3.4 Pre-Emphasis
      5. 8.3.5 AC-Coupling and Termination
        1. 8.3.5.1 Receiver Termination Options
          1. 8.3.5.1.1 Option 1
            1. 8.3.5.1.1.1 Option 2
            2. 8.3.5.1.1.2 Option 3
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power Down
      2. 8.4.2 Tri-State
      3. 8.4.3 Progressive Turn-On (PTO)
  9. 9 Applications and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Using the DS90C241 and DS90C124
      2. 9.1.2 Display Application
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Noise Margin
        2. 9.2.2.2 Transmission Media
        3. 9.2.2.3 Live Link Insertion
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 LVDS Interconnect Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Related Links
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Community Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

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5 Pin Configuration and Functions

DS90C241 Serializer PFB Package
48-Pin TQFP
Top View
DS90C124 DS90C241 20171919.gif

Pin Functions – DS90C241 Serializer

PIN TYPE(1) DESCRIPTION
NAME NO.
LVCMOS PARALLEL INTERFACE PINS
DIN[23:0] 4-1, 48-44,
41-32, 29-25		 I LVCMOS, Transmitter parallel interface data input pins. Tie LOW if unused, do not float.
TCLK 10 I LVCMOS, Transmitter parallel interface clock input pin. Strobe edge set by TRFB configuration pin.
CONTROL AND CONFIGURATION PINS
DCAOFF 5 I LVCMOS, Reserved. This pin must be tied LOW.
DCBOFF 8 I LVCMOS, Reserved. This pin must be tied LOW.
DEN 18 I LVCMOS, Transmitter data enable.
DEN = H; LVDS driver outputs are enabled (ON).
DEN = L; LVDS driver outputs are disabled (OFF), Transmitter LVDS driver DOUT (±) outputs are in TRI-STATE, PLL still operational and locked to TCLK.
PRE 23 I LVCMOS, Pre-emphasis level select.
PRE = NC (No Connect); Pre-emphasis is disabled (OFF).
Pre-emphasis is active when input is tied to VSS through external resistor RPRE. Resistor value determines pre-emphasis level. Recommended value RPRE ≥ 3 kΩ; Imax = [(1.2/R) × 20], Rmin = 3 kΩ
RESRVD 13 I LVCMOS, Reserved. This pin must be tied LOW.
TPWDNB 9 I LVCMOS, Transmitter power down bar.
TPWDNB = H; Transmitter is enabled and ON
TPWDNB = L; Transmitter is in power down mode (Sleep), LVDS driver DOUT (±) outputs are in TRI-STATE stand-by mode, PLL is shutdown to minimize power consumption.
TRFB 11 I LVCMOS, Transmitter clock edge select pin.
TRFB = H; Parallel interface data is strobed on the rising clock edge.
TRFB = L; Parallel interface data is strobed on the falling clock edge.
VODSEL 12 I LVCMOS, VOD Level select
VODSEL = L; LVDS driver output is approximately ± 400 mV (RL = 100 Ω)
VODSEL = H; LVDS driver output is approximately ± 750 mV (RL = 100 Ω)
For normal applications, set this pin LOW. For long cable applications where a larger VOD is required, set this pin HIGH.
LVDS SERIAL INTERFACE PINS
DOUT− 19 O LVDS, Transmitter LVDS inverted (-) output
This output is intended to be loaded with a 100-Ω load to the DOUT- pin. The interconnect must be AC-coupled to this pin with a 100-nF capacitor.
DOUT+ 20 O LVDS, Transmitter LVDS true (+) output.
This output is intended to be loaded with a 100-Ω load to the DOUT+ pin. The interconnect must be AC-coupled to this pin with a 100-nF capacitor.
POWER OR GROUND PINS
VDDDR 22 P VDD, Analog voltage supply, LVDS output power
VDDIT 42 P VDD, Digital voltage supply, Tx input power
VDDL 7 P VDD, Digital voltage supply, Tx logic power
VDDPT0 16 P VDD, Analog voltage supply, VCO power
VDDPT1 14 P VDD, Analog voltage supply, PLL power
VDDT 30 P VDD, Digital voltage supply, Tx serializer power
VSS 24 G ESD ground
VSSDR 21 G Analog ground, LVDS output ground
VSSIT 43 G Digital ground, Tx input ground
VSSL 6 G Digital ground, Tx logic ground
VSSPT0 17 G Analog ground, VCO ground
VSSPT1 15 G Analog ground, PLL ground
VSST 31 G Digital ground, Tx serializer ground
(1) G = Ground, I = Input, O = Output, P = Power
DS90C124 Deserializer PFB Package
48-Pin TQFP
Top View
DS90C124 DS90C241 20171920.gif

Pin Functions – DS90C124 Deserializer

PIN TYPE(1) DESCRIPTION
NAME NO.
LVCMOS PARALLEL INTERFACE PINS
RCLK 18 O LVCMOS, Parallel interface clock output pin. Strobe edge set by RRFB configuration pin.
ROUT[7:0] 25-28, 31-34 O LVCMOS, Receiver LVCMOS level outputs – Group 1
ROUT[15:8] 13-16, 21-24 O LVCMOS, Receiver LVCMOS level outputs – Group 2
ROUT[23:16] 3-6, 9-12 O LVCMOS, Receiver LVCMOS level outputs – Group 3
CONTROL AND CONFIGURATION PINS
REN 48 I LVCMOS, Receiver data enable
REN = H; ROUT[23:0] and RCLK are enabled (ON).
REN = L; ROUT[23:0] and RCLK are disabled (OFF), receiver ROUT[23:0] and RCLK outputs are in TRI-STATE, PLL still operational and locked to TCLK.
LOCK 17 O LVCMOS, LOCK indicates the status of the receiver PLL
LOCK = H; receiver PLL is locked
LOCK = L; receiver PLL is unlocked, ROUT[23:0] and RCLK are TRI-STATED
RESRVD 2 I LVCMOS, Reserved. This pin must be tied LOW.
RPWDNB 1 I LVCMOS, Receiver power down bar.
RPWDNB = H; Receiver is enabled and ON
RPWDNB = L; Receiver is in power down mode (Sleep), ROUT[23:0], RCLK, and LOCK are in TRI-STATE standby mode, PLL is shutdown to minimize power consumption.
RRFB 43 I LVCMOS, Receiver clock edge select pin.
RRFB = H; ROUT LVCMOS outputs strobed on the rising clock edge.
RRFB = L; ROUT LVCMOS outputs strobed on the falling clock edge.
LVDS SERIAL INTERFACE PINS
RIN− 42 I Receiver LVDS Inverted (−) Input
This input is intended to be terminated with a 100-Ω load to the RIN- pin. The interconnect must be AC-coupled to this pin with a 100-nF capacitor.
RIN+ 41 I Receiver LVDS True (+) input
This input is intended to be terminated with a 100-Ω load to the RIN+ pin. The interconnect must be AC-coupled to this pin with a 100-nF capacitor.
POWER OR GROUND PINS
VDDIR 39 P VDD, Analog LVDS voltage supply, power
VDDOR1 30 P VDD, Digital voltage supply, LVCMOS output power
VDDOR2 20 P VDD, Digital voltage supply, LVCMOS output power
VDDOR3 7 P VDD, Digital voltage supply, LVCMOS output power
VDDPR0 47 P VDD, Analog voltage supply, PLL power
VDDPR1 45 P VDD, Analog voltage supply, PLL VCO power
VDDR0 36 P VDD, Digital voltage supply, Logic power
VDDR1 37 P VDD, Digital voltage supply, Logic power
VSSIR 40 G Analog LVDS ground
VSSOR1 29 G Digital ground, LVCMOS output ground
VSSOR2 19 G Digital ground, LVCMOS output ground
VSSOR3 8 G Digital ground, LVCMOS output ground
VSSPR0 46 G Analog ground, PLL ground
VSSPR1 44 G Analog ground, PLL VCO ground
VSSR0 35 G Digital ground, Logic ground
VSSR1 38 G Digital ground, Logic ground
(1) G = Ground, I = Input, O = Output, P = Power