National Semiconductor DS90CF383 Technical data

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DS90CF383 +3.3V LVDS Transmitter 24-Bit Flat Panel Display (FPD) Link—65 MHz

January 2000

General Description

The DS90CF383 transmitter converts 28 bits of CMOS/TTL data into four LVDS (Low Voltage Differential Signaling) data streams. A phase-locked transmit clock is transmitted in parallel with the data streams over a fifthLVDS link. Every cycle of the transmit clock 28 bits of input data are sampled and transmitted. At a transmit clock frequency of 65 MHz, 24 bits of RGB data and 3 bits of LCD timing and control data (FPLINE, FPFRAME, DRDY) are transmitted at arate of 455 Mbps per LVDS data channel. Using a 65 MHz clock, the data throughputs is 227 Mbytes/sec.

This chipset is an ideal means to solve EMI and cable size problems associated with wide, high speed TTL interfaces.

Block Diagram

DS90CF383

Features

n 20 to 65 MHz shift clock support n Single 3.3V supply n Chipset (Tx + Rx) power consumption n Power-down mode ( n Single pixel per clock XGA (1024x768) ready n Supports VGA, SVGA, XGA and higher addressability. n Up to 227 Megabytes/sec bandwidth n Up to 1.8 Gbps throughput n Narrow bus reduces cable size and cost n 290 mV swing LVDS devices for low EMI n PLL requires no external components n Low profile 56-lead TSSOP package n Falling edge data strobe Transmitter n Compatible with TIA/EIA-644 LVDS standard n ESD rating n Operating Temperature: −40˚C to +85˚C

7kV

0.5 mW total)

250 mW (typ)

DS100033-1

Order Number DS90CF383MTD

See NS Package Number MTD56

TRI-STATE®is a registered trademark of National Semiconductor Corporation.

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required, please contact the National SemiconductorSales Office/ Distributors for availability and specifications.

DS90CF383

Supply Voltage (V CMOS/TTL Input Voltage −0.3V to (V LVDS Driver Output Voltage −0.3V to (V LVDS Output Short Circuit

Duration Continuous Junction Temperature +150˚C Storage Temperature −65˚C to +150˚C Lead Temperature

(Soldering, 4 sec) +260˚C Maximum Package Power Dissipation Capacity

MTD56 (TSSOP) Package:

DS90CF383 1.63 W

) −0.3V to +4V

CC CC

+ 0.3V) + 0.3V)

25˚C

Package Derating:

DS90CF383 12.5 mW/˚C above +25˚C

ESD Rating

(HBM, 1.5 kΩ, 100 pF)

Recommended Operating Conditions

Supply Voltage (V

) 3.0 3.3 3.6 V

Operating Free Air

Temperature (T

) −40 +25 +85 ˚C

Receiver Input Range 0 2.4 V Supply Noise Voltage (V

Min Nom Max Units

) 100 mV

Electrical Characteristics

Over recommended operating supply and temperature ranges unless otherwise specified.

Symbol Parameter Conditions Min Typ Max Units

CMOS/TTL DC SPECIFICATIONS

LVDS DC SPECIFICATIONS

∆V

TRANSMITTER SUPPLY CURRENT

ICCTW Transmitter Supply Current

ICCTG Transmitter Supply Current

ICCTZ Transmitter Supply Current

Note 1: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the device should be operated at these limits. The tables of “Electrical Characteristics” specify conditions for device operation.

High Level Input Voltage 2.0 V Low Level Input Voltage GND 0.8 V High Level Output Voltage IOH= −0.4 mA 2.7 3.3 V Low Level Output Voltage IOL= 2 mA 0.1 0.3 V Input Clamp Voltage ICL= −18 mA −0.79 −1.5 V Input Current VIN=VCC, GND, 2.5V or 0.4V Output Short Circuit Current V

= 0V −60 −120 mA

OUT

5.1±10 µA

Differential Output Voltage RL= 100Ω 250 345 450 mV Change in VODbetween

complimentary output states Offset Voltage (Note 4) 1.125 1.25 1.375 V Change in VOSbetween

complimentary output states Output Short Circuit Current V Output TRI-STATE®Current Power Down = 0V,

= 0V, RL= 100Ω −3.5 −5 mA

OUT

=0VorV

Differential Input High Threshold VCM= +1.2V +100 mV Differential Input Low Threshold −100 mV Input Current VIN= +2.4V, VCC= 3.6V

= 0V, VCC= 3.6V

Worst Case

16 Grayscale

Power Down

= 100Ω,

= 5 pF,

Worst Case Pattern

(Figures 1, 3)

= 100Ω,

= 5 pF,

16 Grayscale Pattern

(Figures 2, 3)

Power Down = Low Driver Outputs in TRI-STATE®under

f = 32.5 MHz 31 45 mA f = 37.5 MHz 32 50 mA f = 65 MHz 42 55 mA f = 32.5 MHz 23 35 mA f = 37.5 MHz 28 40 mA f = 65 MHz 31 45 mA

10 55 µA

Power Down Mode

35 mV

10 µA

7kV

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Electrical Characteristics (Continued)

Note 2: Typical values are given for VCC= 3.3V and TA= +25C. Note 3: Current into device pins is defined as positive. Current out of device pins is defined as negative. Voltages are referenced to ground unless otherwisespeci-

fied (except V Note 4: V

and ∆VOD).

previously referred as VCM.

Transmitter Switching Characteristics

Over recommended operating supply and temperature ranges unless otherwise specified

Symbol Parameter Min Typ Max Units

(Figure 4 )

(Figure 3 ) (Figure 3 )

(Figure 5 )

(Figure 12 )

f = 65 MHz −0.4 0 0.3 ps

LLHT LVDS Low-to-High Transition Time LHLT LVDS High-to-Low Transition Time TCIT TxCLK IN Transition Time TCCS TxOUT Channel-to-Channel Skew TPPos0 Transmitter Output Pulse Position for Bit 0 TPPos1 Transmitter Output Pulse Position for Bit 1 1.8 2.2 2.5 ns TPPos2 Transmitter Output Pulse Position for Bit 2 4.0 4.4 4.7 ns TPPos3 Transmitter Output Pulse Position for Bit 3 6.2 6.6 6.9 ns TPPos4 Transmitter Output Pulse Position for Bit 4 8.4 8.8 9.1 ns TPPos5 Transmitter Output Pulse Position for Bit 5 10.6 11.0 11.3 ns TPPos6 Transmitter Output Pulse Position for Bit 6 12.8 13.2 13.5 ns TCIP TxCLK IN Period TCIH TxCLK IN High Time TCIL TxCLK IN Low Time TSTC TxIN Setup to TxCLK IN THTC TxIN Hold to TxCLK IN TCCD TxCLK IN to TxCLK OUT Delay 25˚C, V TPLLS Transmitter Phase Lock Loop Set TPDD Transmitter Power Down Delay

(Figure 6)

(Figure 11)

(Figure 8 )

= 3.3V

0.35T 0.5T 0.65T ns

f = 65 MHz 2.5 ns

(Figure 7 )

0.75 1.5 ns

0.75 1.5 ns 5ns

250 ps

15 T 50 ns

0ns 3 5.5 ns

10 ms

100 ns

DS90CF383

AC Timing Diagrams

DS100033-4

FIGURE 1. “Worst Case” Test Pattern

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