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General Description
The DS90C385 transmitter converts 28 bits of LVCMOS/
LVTTL data into four LVDS (Low Voltage Differential Signal-
ing) data streams. A phase-locked transmit clock is transmit-
ted in parallel with the data streams over a fifth LVDS link.
Every cycle of the transmit clock 28 bits of input data are
sampled and transmitted. At a transmit clock frequency of 85
MHz, 24 bits of RGB data and 3 bits of LCD timing and
control data (FPLINE, FPFRAME, DRDY) are transmitted at
a rate of 595 Mbps per LVDS data channel. Using a 85 MHz
clock, the data throughput is 297.5 Mbytes/sec. Also avail-
able is the DS90C365 that converts 21 bits of LVCMOS/
LVTTL data into three LVDS (Low Voltage Differential Sig-
naling) data streams. Both transmitters can be programmed
for Rising edge strobe or Falling edge strobe through a
dedicated pin. A Rising edge or Falling edge strobe transmit-
ter will interoperate with a Falling edge strobe Receiver
(DS90CF386/DS90CF366) without any translation logic.
The DS90C385 is also offered in a 64 ball, 0.8mm fine pitch
ball grid array (FBGA) package which provides a 44 %
reduction in PCB footprint compared to the TSSOP package.
This chipset is an ideal means to solve EMI and cable size
problems associated with wide, high-speed TTL interfaces.
Features
-
20 to 85 MHz shift clock support
-
Best±in±Class Set & Hold Times on TxINPUTs
-
Tx power consumption
<
130 mW (typ)
@
85MHz
Grayscale
-
Tx Power-down mode
<
200 W (max)
-
Supports VGA, SVGA, XGA and Single/Dual Pixel
SXGA.
-
Narrow bus reduces cable size and cost
-
Up to 2.38 Gbps throughput
-
Up to 297.5 Megabytes/sec bandwidth
-
345 mV (typ) swing LVDS devices for low EMI
-
PLL requires no external components
-
Compatible with TIA/EIA-644 LVDS standard
-
Low profile 56-lead or 48-lead TSSOP package
-
DS90C385 also available in a 64 ball, 0.8mm fine pitch
ball grid array (FBGA) package
Block Diagrams
DS90C385
DS100868-1
Order Number DS90C385MTD or DS90C385SLC
See NS Package Number MTD56 or SLC64A
DS90C365
DS100868-29
Order Number DS90C365MTD
See NS Package Number MTD48
DS90C3
8
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Summary of Contents for PD421
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Page 30: ...29 Plasma Display PD421 MC68HC705BD7B TA8851...
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