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DS90C387VJD Datasheet

  • DS90C387VJD

  • Dual Pixel LVDS Display Interface (LDI)-SVGA/QXGA

  • 26頁

  • NSC

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DS90C387/DS90CF388 Dual Pixel LVDS Display Interface (LDI)-SVGA/QXGA
May 2004
DS90C387/DS90CF388
Dual Pixel LVDS Display Interface (LDI)-SVGA/QXGA
General Description
The DS90C387/DS90CF388 transmitter/receiver pair is de-
signed to support dual pixel data transmission between Host
and Flat Panel Display up to QXGA resolutions. The trans-
mitter converts 48 bits (Dual Pixel 24-bit color) of CMOS/TTL
data into 8 LVDS (Low Voltage Differential Signalling) data
streams. Control signals (VSYNC, HSYNC, DE and two
user-defined signals) are sent during blanking intervals. At a
maximum dual pixel rate of 112MHz, LVDS data line speed is
672Mbps, providing a total throughput of 5.38Gbps (672
Megabytes per second). Two other modes are also sup-
ported. 24-bit color data (single pixel) can be clocked into the
transmitter at a maximum rate of 170MHz. In this mode, the
transmitter provides single-to-dual pixel conversion, and the
output LVDS clock rate is 85MHz maximum. The third mode
provides inter-operability with FPD-Link devices.
The LDI chipset is improved over prior generations of FPD-
Link devices and offers higher bandwidth support and longer
cable drive with three areas of enhancement. To increase
bandwidth, the maximum pixel clock rate is increased to 112
(170) MHz and 8 serialized LVDS outputs are provided.
Cable drive is enhanced with a user selectable pre-
emphasis feature that provides additional output current dur-
ing transitions to counteract cable loading effects. DC bal-
ancing on a cycle-to-cycle basis, is also provided to reduce
ISI (Inter-Symbol Interference). With pre-emphasis and DC
balancing, a low distortion eye-pattern is provided at the
receiver end of the cable. A cable deskew capability has
been added to deskew long cables of pair-to-pair skew of up
to +/鈭? LVDS data bit time (up to 80 MHz Clock Rate). These
three enhancements allow cables 5+ meters in length to be
driven. This chipset is an ideal means to solve EMI and cable
size problems for high-resolution flat panel applications. It
provides a reliable interface based on LVDS technology that
delivers the bandwidth needed for high-resolution panels
while maximizing bit times, and keeping clock rates low to
reduce EMI and shielding requirements. For more details,
please refer to the 鈥淎pplications Information鈥?section of this
datasheet.
Features
n
Complies with OpenLDI specification for digital display
interfaces
n
32.5 to 112/170MHz clock support for DS90C387, 40 to
112MHz clock support for DS90CF388
n
Supports SVGA through QXGA panel resolutions
n
Drives long, low cost cables
n
Up to 5.38Gbps bandwidth
n
Pre-emphasis reduces cable loading effects
n
DC Balance data transmission provided by transmitter
reduces ISI distortion
n
Cable Deskew of +/鈭? LVDS data bit time (up to 80
MHz Clock Rate) of pair-to-pair skew at receiver inputs;
intra-pair skew tolerance of 300ps
n
Dual pixel architecture supports interface to GUI and
timing controller; optional single pixel transmitter inputs
support single pixel GUI interface
n
Transmitter rejects cycle-to-cycle jitter
n
5V tolerant on data and control input pins
n
Programmable transmitter data and control strobe select
(rising or falling edge strobe)
n
Backward compatible configuration select with FPD-Link
n
Optional second LVDS clock for backward compatibility
w/ FPD-Link
n
Support for two additional user-defined control signals in
DC Balanced mode
n
Compatible with ANSI/TIA/EIA-644-1995 LVDS Standard
TRI-STATE
廬
is a registered trademark of National Semiconductor Corporation.
漏 2004 National Semiconductor Corporation
DS100073
www.national.com

DS90C387VJD 產(chǎn)品屬性

  • National Semiconductor (TI)

  • 8

  • 48

  • 5380 Mbps

  • 3.3 V

  • 2800 mW

  • + 70 C

  • TQFP-100

  • Tray

  • - 10 C

  • SMD/SMT

  • 90

  • 3.6 V

  • 3 V

  • LVDS

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