National Semiconductor DS90C383B +3.3V Programmable LVDS Transmitter for 24-Bit Flat Panel Display (FPD) Link, Operating at 65 MHz

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90C 383B +3.3V rogram able LV Transm itter 24-B it Flat anel D isplay (FP Link-65

October

DS90C383B +3.3V Programmable LVDS Transmitter 24-Bit Flat Panel Display (FPD) Link-65 MHz General Description Features

The DS90C383B transmitter converts bits of CMOS/TTL No special start-up sequence required between data into four LVDS (Low Voltage Differential Signaling) data clock/data and /PD pins. Input signal (clock and data) streams. phase-locked transmit clock is transmitted in can be applied either before or after the device is parallel with the data streams over fifth LVDS link. Every powered. cycle of the transmit clock bits of input data are sampled Support Spread Spectrum Clocking up to 100k Hz

and transmitted. At transmit clock frequency of MHz, frequency modulation deviations of ±2.5% center

bits of RGB data and bits of LCD timing and control data spread or −5% down spread.

(FPLINE, FPFRAME, DRDY) are transmitted at rate of "Input Clock Detection" feature will pull all LVDS pairs to Mbps per LVDS data channel. Using MHz clock, the logic low when input clock is missing and when /PD pin data throughput is Mbytes/sec. The DS90C383B trans- is logic high. mitter can be programmed for Rising edge strobe or Falling

to MHz shift clock support

edge strobe through dedicated pin. Rising edge or

Best–in–Class Set Hold Times on Tx INPUTs

Falling edge strobe transmitter will interoperate with Falling

Tx power consumption m W (typ) @65MHz

edge strobe Receiver (DS90CF386) without any translation

Grayscale

logic.

40% Less Power Dissipation than Bi CMOS Alternatives

This chipset is an ideal means to solve EMI and cable size

Tx Power-down mode 60µW (typ)

problems associated with wide, high speed TTL interfaces.

Supports VGA, SVGA, XGA and Dual Pixel SXGA. Narrow bus reduces cable size and cost Up to 1.8 Gbps throughput Up to Megabytes/sec bandwidth m V (typ) swing LVDS devices for low EMI PLL requires no external components Compatible with TIA/EIA-644 LVDS standard Low profile 56-lead TSSOP package Improved replacement for: SN75LVDS83, DS90C383A

Block Diagram

DS90C383B

Order Number DS90C383BMT See NS Package Number MTD56

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