DS90C385A

ACTIVE

LVDS transmitter flat-panel display, 85-MHz

Product details

Protocols Catalog Rating Catalog Operating temperature range (°C) -10 to 70
Protocols Catalog Rating Catalog Operating temperature range (°C) -10 to 70
TSSOP (DGG) 56 113.4 mm² (14 mm × 8.1 mm)
  • Pin-to-Pin Compatible to DS90C383, DS90C383A and DS90C385
  • No Special Start-Up Sequence Required between Clock/Data and /PD Pins. Input Signals (Clock and Data) can be Applied Either Before or After the Device is Powered.
  • Support Spread Spectrum Clocking up to 100kHz Frequency Modulation and Deviations of ±2.5% Center Spread or -5% Down Spread
  • “Input Clock Detection" Feature Will Pull All LVDS Pairs to Logic Low When Input Clock is Missing and When /PD Pin is Logic High
  • 18 to 87.5 MHz Shift Clock Support
  • Tx Power Consumption < 147 mW (typ) at 87.5MHz Grayscale
  • Tx Power-Down Mode < 60 μW (typ)
  • Supports VGA, SVGA, XGA, SXGA(Dual Pixel), SXGA+(Dual Pixel), UXGA(Dual Pixel).
  • Narrow Bus Reduces Cable Size and Cost
  • Up to 2.45 Gbps Throughput
  • Up to 306.25Megabyte/sec Bandwidth
  • 345 mV (typ) Swing LVDS Devices for Low EMI
  • PLL Requires No External Components
  • Compliant to TIA/EIA-644 LVDS standard
  • Low Profile 56-lead TSSOP Package

All trademarks are the property of their respective owners.

  • Pin-to-Pin Compatible to DS90C383, DS90C383A and DS90C385
  • No Special Start-Up Sequence Required between Clock/Data and /PD Pins. Input Signals (Clock and Data) can be Applied Either Before or After the Device is Powered.
  • Support Spread Spectrum Clocking up to 100kHz Frequency Modulation and Deviations of ±2.5% Center Spread or -5% Down Spread
  • “Input Clock Detection" Feature Will Pull All LVDS Pairs to Logic Low When Input Clock is Missing and When /PD Pin is Logic High
  • 18 to 87.5 MHz Shift Clock Support
  • Tx Power Consumption < 147 mW (typ) at 87.5MHz Grayscale
  • Tx Power-Down Mode < 60 μW (typ)
  • Supports VGA, SVGA, XGA, SXGA(Dual Pixel), SXGA+(Dual Pixel), UXGA(Dual Pixel).
  • Narrow Bus Reduces Cable Size and Cost
  • Up to 2.45 Gbps Throughput
  • Up to 306.25Megabyte/sec Bandwidth
  • 345 mV (typ) Swing LVDS Devices for Low EMI
  • PLL Requires No External Components
  • Compliant to TIA/EIA-644 LVDS standard
  • Low Profile 56-lead TSSOP Package

All trademarks are the property of their respective owners.

The DS90C385A is a pin to pin compatible replacement for DS90C383, DS90C383A and DS90C385. The DS90C385A has additional features and improvements making it an ideal replacement for DS90C383, DS90C383A and DS90C385. family of LVDS Transmitters.

The DS90C385A transmitter converts 28 bits of LVCMOS/LVTTL data into four LVDS (Low Voltage Differential Signaling) data streams. A phase-locked transmit clock is transmitted in parallel with the data streams over the fifth LVDS link. Every cycle of the transmit clock 28 bits of input data are sampled and transmitted. At a transmit clock frequency of 87.5 MHz, 24 bits of RGB data and 3 bits of LCD timing and control data (FPLINE, FPFRAME, DRDY) are transmitted at a rate of 612.5Mbps per LVDS data channel. Using a 87.5 MHz clock, the data throughput is 306.25Mbytes/sec. This transmitter can be programmed for Rising edge strobe or Falling edge strobe through a dedicated pin. A Rising edge or Falling edge strobe transmitter will interoperate with a Falling edge strobe FPDLink Receiver without any translation logic.

This chipset is an ideal means to solve EMI and cable size problems associated with wide, high-speed TTL interfaces with added Spread Spectrum Clocking support.

The DS90C385A is a pin to pin compatible replacement for DS90C383, DS90C383A and DS90C385. The DS90C385A has additional features and improvements making it an ideal replacement for DS90C383, DS90C383A and DS90C385. family of LVDS Transmitters.

The DS90C385A transmitter converts 28 bits of LVCMOS/LVTTL data into four LVDS (Low Voltage Differential Signaling) data streams. A phase-locked transmit clock is transmitted in parallel with the data streams over the fifth LVDS link. Every cycle of the transmit clock 28 bits of input data are sampled and transmitted. At a transmit clock frequency of 87.5 MHz, 24 bits of RGB data and 3 bits of LCD timing and control data (FPLINE, FPFRAME, DRDY) are transmitted at a rate of 612.5Mbps per LVDS data channel. Using a 87.5 MHz clock, the data throughput is 306.25Mbytes/sec. This transmitter can be programmed for Rising edge strobe or Falling edge strobe through a dedicated pin. A Rising edge or Falling edge strobe transmitter will interoperate with a Falling edge strobe FPDLink Receiver without any translation logic.

This chipset is an ideal means to solve EMI and cable size problems associated with wide, high-speed TTL interfaces with added Spread Spectrum Clocking support.

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Technical documentation

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* Data sheet DS90C385A 3.3V Prog LVDS Trans 24-Bit FPD Link-87.5 MHz datasheet (Rev. K) Apr 17, 2013
Application note High-Speed Layout Guidelines for Reducing EMI for LVDS SerDes Designs Nov 9, 2018
Application note How to Map RGB Signals to LVDS/OpenLDI(OLDI) Displays (Rev. A) Jun 29, 2018
Application note AN-1032 An Introduction to FPD-Link (Rev. C) Aug 8, 2017
User guide FLINK3V8BT-85 Evaluation Kit (Rev. A) Aug 24, 2016
Application note Receiver Skew Margin for Channel Link I and FPD Link I Devices PDF | HTML Jan 13, 2016
Application note TFT Data Mapping for Dual Pixel LDI Application - Alternate A - Color Map May 15, 2004
Application note AN-1056 STN Application Using FPD-Link May 14, 2004
Application note AN-1085 FPD-Link PCB and Interconnect Design-In Guidelines May 14, 2004

Design & development

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Evaluation board

FLINK3V8BT-85 — Evaluation kit for FPD-Link family of serializer and deserializer LVDS devices

The FPD-Link evaluation kit includes a transmitter (Tx) board, a receiver (Rx) board and interfacing cables. This kit shows the chipsets interfacing from test equipment or a graphics controller using low-voltage differential signaling (LVDS) to a receiver board.

The transmitter board accepts (...)

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Simulation model

DS90C385A IBIS Model

SNLM080.ZIP (7 KB) - IBIS model
Supported products & hardware
Reference design

TIDA-010013 — RGB to OLDI/LVDS Display Bridge Reference Design for Sitara™ Processors

Higher resolution displays are now in larger demand than ever before. This results in a higher pixel clock which can lead to challenges such as high EMI emission and noise immunity. As a result, the video interface now transitions from a traditional RGB to LVDS video interface. As microprocessors (...)
Supported products & hardware
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TSSOP (DGG) 56 Ultra Librarian

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