DS90C383A/DS90CF383A +3.3V Programmable LVDS Transmitter 24-Bit Flat Panel Display (FPD) Link-65 MHz +3.3V LVDS Transmitter 24-Bit Flat Panel Display (FPD) Link-65 MHz 1.0 General Description 2.0 Features The DS90C383A/DS90CF383A 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 fifth LVDS 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 a rate of 455 Mbps per LVDS data channel. Using a 65 MHz clock, the data throughput is 227 Mbytes/ sec. The DS90C383A transmitter can be programmed for Rising edge strobe or Falling edge strobe through a dedicated pin. The DS90CF383A is fixed as a Falling edge strobe transmitter. A Rising edge or Falling edge strobe transmitter will interoperate with a Falling edge strobe Receiver (DS90CF384) without any translation logic. This chipset is an ideal means to solve EMI and cable size problems associated with wide, high speed TTL interfaces. n 20 to 65 MHz shift clock support n Rejects > ± 3ns Jitter from VGA chip with less than 225ps output Jitter @65MHz (TJCC) n Best–in–Class Set & Hold Times on TxINPUTs n Tx power consumption < 130 mW (typ) @65MHz Grayscale n > 50% Less Power Dissipation than BiCMOS Alternatives n Tx Power-down mode < 200µW (max) n ESD rating > 7 kV (HBM), > 500V (EIAJ) n Supports VGA, SVGA, XGA and Dual Pixel SXGA. n Narrow bus reduces cable size and cost n Up to 1.8 Gbps throughput n Up to 227 Megabytes/sec bandwidth n 345 mV (typ) swing LVDS devices for low EMI n PLL requires no external components n Compatible with TIA/EIA-644 LVDS standard n Low profile 56-lead TSSOP package n Improved replacement for: SN75LVDS83 — DS90C383A SN75LVDS81 — DS90CF383A 3.0 Block Diagrams DS90C383A/DS90CF383A DS100100-1 Order Number DS90C383AMTD or DS90CF383AMTD See NS Package Number MTD56 TRI-STATE ® is a registered trademark of National Semiconductor Corporation. © 1999 National Semiconductor Corporation DS100100 www.national.com DS90C383A/DS90CF383A +3.3V Programmable LVDS Transmitter 24-Bit Flat Panel Display (FPD) Link-65 MHz, +3.3V LVDS Transmitter 24-Bit Flat Panel Display (FPD) Link-65 MHz July 1998 4.0 Absolute Maximum Ratings (Note Package Derating: DS90C383A/DS90CF383A ESD Rating (HBM, 1.5 kΩ, 100 pF) (EIAJ, 0Ω, 200 pF) 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. 12.5 mW/˚C above +25˚C > 7 kV > 500V 5.0 Recommended Operating Conditions −0.3V to +4V Supply Voltage (VCC) CMOS/TTL Input Voltage −0.3V to (VCC + 0.3V) LVDS Driver Output Voltage −0.3V to (VCC + 0.3V) 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 @ 25˚C MTD56 (TSSOP) Package: DS90C383A/DS90CF383A 1.63 W Supply Voltage (VCC) Operating Free Air Temperature (TA) Receiver Input Range Supply Noise Voltage (VCC) TxCLKIN frequency Min 3.0 Nom 3.3 Max 3.6 Units V −10 0 +25 +70 2.4 100 68 ˚C V 18 mVPP MHz Electrical Characteristics Over recommended operating supply and temperature ranges unless otherwise specified. Symbol Parameter Conditions Min Typ Max Units CMOS/TTL DC SPECIFICATIONS VIH High Level Input Voltage 2.0 VCC V VIL Low Level Input Voltage GND 0.8 V VCL Input Clamp Voltage ICL = −18 mA IIN Input Current V IN = 0.4V, 2.5V or VCC V IN = GND −0.79 −1.5 V +1.8 +10 µA −10 0 250 345 µA LVDS DC SPECIFICATIONS VOD Differential Output Voltage ∆VOD Change in VOD between complimentary output states VOS Offset Voltage (Note 4) ∆VOS Change in VOS between complimentary output states IOS Output Short Circuit Current VOUT = 0V, RL = 100Ω IOZ Output TRI-STATE ® Current Power Down = 0V, VOUT = 0V or VCC RL = 100Ω 1.125 1.25 450 mV 35 mV 1.375 V 35 mV −3.5 −5 mA ±1 ± 10 µA TRANSMITTER SUPPLY CURRENT ICCTW ICCTG ICCTZ Transmitter Supply Current Worst Case Transmitter Supply Current 16 Grayscale Transmitter Supply Current Power Down RL = 100Ω, CL = 5 pF, Worst Case Pattern (Figures 1, 4) f = 32.5 MHz 31 43 mA f = 37.5 MHz 33 45 mA f = 65 MHz 39 52 mA RL = 100Ω, CL = 5 pF, 16 Grayscale Pattern (Figures 2, 4) f = 32.5 MHz 23 35 mA f = 37.5 MHz 28 40 mA f = 65 MHz 33 45 mA 10 55 µA Power Down = Low Driver Outputs in TRI-STATE under Power Down Mode 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. Note 2: Typical values are given for VCC = 3.3V and T A = +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 otherwise specified (except VOD and ∆VOD). Note 4: VOS previously referred as VCM. www.national.com 2 Recommended Transmitter Input Characteristics Over recommended operating supply and temperature ranges unless otherwise specified Symbol Parameter TCIT TxCLK IN Transition Time (Figure 5 ) TCIP TxCLK IN Period (Figure 6 ) TCIH TCIL Min Typ Max Units 5 ns 14.7 T 55.6 ns TxCLK IN High Time (Figure 6 ) 0.35T 0.5T 0.65T ns TxCLK IN Low Time (Figure 6) 0.35T 0.5T 0.65T ns Transmitter Switching Characteristics Over recommended operating supply and temperature ranges unless otherwise specified Typ Max Units LLHT Symbol LVDS Low-to-High Transition Time (Figure 4 ) Parameter Min 0.75 1.5 ns LHLT LVDS High-to-Low Transition Time (Figure 4 ) 0.75 1.5 ns TPPos0 Transmitter Output Pulse Position for Bit 0 (Figure 11 ) (Note 5) −0.30 0 0.20 ns TPPos1 Transmitter Output Pulse Position for Bit 1 1.90 2.20 2.40 ns TPPos2 Transmitter Output Pulse Position for Bit 2 4.10 4.40 4.60 ns TPPos3 Transmitter Output Pulse Position for Bit 3 6.30 6.60 6.80 ns TPPos4 Transmitter Output Pulse Position for Bit 4 8.50 8.80 9.00 ns TPPos5 Transmitter Output Pulse Position for Bit 5 10.70 11.00 11.20 ns TPPos6 Transmitter Output Pulse Position for Bit 6 ns TPPos0 Transmitter Output Pulse Position for Bit 0 (Figure 11 ) (Note 5) TPPos1 Transmitter Output Pulse Position for Bit 1 TPPos2 Transmitter Output Pulse Position for Bit 2 6.79 7.14 7.49 ns TPPos3 Transmitter Output Pulse Position for Bit 3 10.36 10.71 11.06 ns TPPos4 Transmitter Output Pulse Position for Bit 4 13.93 14.28 14.63 ns TPPos5 Transmitter Output Pulse Position for Bit 5 17.51 17.86 18.21 ns TPPos6 Transmitter Output Pulse Position for Bit 6 21.08 21.43 21.78 ns TPPos0 Transmitter Output Pulse Position for Bit 0 (Figure 11 ) (Note 5) −0.40 0 0.40 ns TPPos1 Transmitter Output Pulse Position for Bit 1 4.00 4.40 4.80 ns TPPos2 Transmitter Output Pulse Position for Bit 2 8.40 8.80 9.20 ns TPPos3 Transmitter Output Pulse Position for Bit 3 12.80 13.20 13.60 ns TPPos4 Transmitter Output Pulse Position for Bit 4 17.20 17.60 18.00 ns TPPos5 Transmitter Output Pulse Position for Bit 5 21.60 22.00 22.40 ns TPPos6 Transmitter Output Pulse Position for Bit 6 26.00 26.40 26.80 ns TSTC TxIN Setup to TxCLK IN (Figure 6 ) 2.5 THTC TxIN Hold to TxCLK IN (Figure 6 ) 0 TCCD TxCLK IN to TxCLK OUT Delay (Figure 7 ) TA=25˚C,VCC=3.3V 3 TJCC Transmitter Jitter Cycle-to-Cycle (Figures 12, 13 ) (Note 6) f = 65 MHz f = 40 MHz f = 32.5 MHz TxCLK IN to TxCLK OUT Delay (Figure 7 ) 12.90 13.20 13.40 −0.35 0 0.35 ns 3.22 3.57 3.92 ns ns ns 3 f = 65 MHz f = 40 MHz f = 32.5 MHz 5.5 ns 7.0 ns 175 225 ps 240 380 ps 260 400 ps TPLLS Transmitter Phase Lock Loop Set (Figure 8 ) 10 ms TPDD Transmitter Power Down Delay (Figure 10 ) 100 ns Note 5: The Minimum and Maximum Limits are based on statistical analysis of the device performance over process, voltage, and temperature ranges. This parameter is functionality tested only on Automatic Test Equipment (ATE). Note 6: The Limits are based on statistical analysis of the device performance over process, voltage, and temperature ranges. Output jitter is measured with a cycleto-cycle jitter of 3ns applied to the input clock signal. A jitter event of 3ns, represents worse case jump in the clock edge from most Graphics controller VGA chips currently available. This parameter is used when calculating system margin (RSKM). See Figures 12, 13 and AN-1059. 3 www.national.com 6.0 AC Timing Diagrams DS100100-4 FIGURE 1. “Worst Case” Test Pattern DS100100-5 FIGURE 2. “16 Grayscale” Test Pattern (Notes 7, 8, 9, 10) Note 7: The worst case test pattern produces a maximum toggling of digital circuits, LVDS I/O and CMOS/TTL I/O. Note 8: The 16 grayscale test pattern tests device power consumption for a “typical” LCD display pattern. The test pattern approximates signal switching needed to produce groups of 16 vertical stripes across the display. Note 9: Figures 1, 2 show a falling edge data strobe (TxCLK IN/RxCLK OUT). Note 10: Recommended pin to signal mapping. Customer may choose to define differently. www.national.com 4 6.0 AC Timing Diagrams (Continued) DS100100-30 FIGURE 3. DS90C383A/DS90CF383A (Transmitter) LVDS Output Load DS100100-6 FIGURE 4. DS90C383A/DS90CF383A (Transmitter) LVDS Transition Times DS100100-8 FIGURE 5. DS90C383A/DS90CF383A (Transmitter) Input Clock Transition Time DS100100-10 FIGURE 6. DS90C383A/DS90CF383A (Transmitter) Setup/Hold and High/Low Times (Falling Edge Strobe) DS100100-12 FIGURE 7. DS90C383A/DS90CF383A (Transmitter) Clock In to Clock Out Delay (Falling Edge Strobe) 5 www.national.com 6.0 AC Timing Diagrams (Continued) DS100100-14 FIGURE 8. DS90C383A/DS90CF383A (Transmitter) Phase Lock Loop Set Time DS100100-17 FIGURE 9. 28 Parallel TTL Data Inputs Mapped to LVDS Outputs DS100100-18 FIGURE 10. Transmitter Power Down Delay www.national.com 6 6.0 AC Timing Diagrams (Continued) DS100100-26 FIGURE 11. Transmitter LVDS Output Pulse Position Measurement DS100100-27 FIGURE 12. TJCC Test Setup 7 www.national.com 6.0 AC Timing Diagrams (Continued) DS100100-28 FIGURE 13. Timing Diagram of the Input cycle-to-cycle clock jitter 7.0 DS90C383A Pin Description — FPD Link Transmitter I/O No. TxIN Pin Name I 28 Description TxOUT+ O 4 Positive LVDS differentiaI data output. TxOUT− O 4 Negative LVDS differential data output. FPSHIFT IN I 1 TTL Ievel clock input. The falling edge acts as data strobe. Pin name TxCLK IN. R_FB I 1 Programmable strobe select (See Table 1). TxCLK OUT+ O 1 Positive LVDS differential clock output. TxCLK OUT− O 1 Negative LVDS differential clock output. PWR DOWN I 1 TTL level input. When asserted (low input) TRI-STATES the outputs, ensuring low current at power down. TTL level input. This includes: 8 Red, 8 Green, 8 Blue, and 4 control lines — FPLINE, FPFRAME and DRDY (also referred to as HSYNC, VSYNC, Data Enable). VCC I 3 Power supply pins for TTL inputs. GND I 4 Ground pins for TTL inputs. PLL VCC I 1 Power supply pin for PLL. PLL GND I 2 Ground pins for PLL. LVDS VCC I 1 Power supply pin for LVDS outputs. LVDS GND I 3 Ground pins for LVDS outputs. 8.0 DS90CF383A Pin Description — FPD Link Transmitter I/O No. TxIN Pin Name I 28 TxOUT+ O 4 Positive LVDS differential data output. TxOUT− O 4 Negative LVDS differential data output. FPSHIFT IN I 1 TTL Ievel clock input. The falling edge acts as data strobe. Pin name TxCLK IN. TxCLK OUT+ O 1 Positive LVDS differential clock output. TxCLK OUT− O 1 Negative LVDS differential clock output. PWR DOWN I 1 TTL level input. When asserted (low input) TRI-STATES the outputs, ensuring low current at power down. VCC I 4 Power supply pins for TTL inputs. www.national.com Description TTL level input. This includes: 8 Red, 8 Green, 8 Blue, and 4 control lines — FPLINE, FPFRAME and DRDY (also referred to as HSYNC, VSYNC, Data Enable). 8 8.0 DS90CF383A Pin Description — FPD Link Transmitter Pin Name GND I/O No. I 4 (Continued) Description Ground pins for TTL inputs. PLL VCC I 1 Power supply pin for PLL. PLL GND I 2 Ground pins for PLL. LVDS VCC I 1 Power supply pin for LVDS outputs. LVDS GND I 3 Ground pins for LVDS outputs. 9.0 Applications Information The DS90C383A/DS90CF383A are backward compatible with the DS90C383/DS90CF383 and are a pin-for-pin replacement. The device (DS90C383A/DS90CF383A) utilizes a different PLL architecture employing an internal 7X clock for enhanced pulse position control. This device (DS90C383A/DS90CF383A) also features reduced variation of the TCCD parameter which is important for dual pixel applications. (See AN-1084) TCCD variation has been measured to be less than 250ps at 65MHz under normal operating conditions. This device may also be used as a replacement for the DS90CF583 (5V, 65MHz) and DS90CF581 (5V, 40MHz) FPD-Link Transmitters with certain considerations/ modifications: 1. Change 5V power supply to 3.3V. Provide this supply to the VCC, LVDS VCC and PLL VCC of the transmitter. 2. The DS90C383A transmitter input and control inputs accept 3.3V TTL/CMOS levels. They are not 5V tolerant. 3. To implement a falling edge device for the DS90C383A, the R_FB pin (pin 17) may be tied to ground OR left unconnected (an internal pull-down resistor biases this pin low). Biasing this pin to Vcc implements a rising edge device. 10.0 Transmitter Clock Jitter Cycle-to-Cycle peated at a period of 2µs, which is the period of the input data (1µs high, 1µs low). At different operating frequencies the N Cycle is changed to maintain the desired 3ns cycle-tocycle jitter at 2µs period. Figures 12 and 13 illustrate the timing of the input clock relative to the input data. The input clock (TxCLKin) is intentionally shifted to the left −3ns and +3ns to the right when data (Txin0-27) is high. This 3ns of cycle-to-cycle clock jitter is re- 9 www.national.com 11.0 Pin Diagram DS90C383A DS90CF383A DS100100-23 DS100100-24 Application DS100100-3 TABLE 1. Programmable Transmitter (DS90C383A) Pin www.national.com Condition Strobe Status R_FB R_FB = VCC Rising edge strobe R_FB R_FB = GND or NC Falling edge strobe 10 inches (millimeters) unless otherwise noted 56-Lead Molded Thin Shrink Small Outline Package, JEDEC Order Number DS90C383AMTD, DS90CF383AMTD NS Package Number MTD56 LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. National Semiconductor Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: [email protected] www.national.com National Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: [email protected] Deutsch Tel: +49 (0) 1 80-530 85 85 English Tel: +49 (0) 1 80-532 78 32 Français Tel: +49 (0) 1 80-532 93 58 Italiano Tel: +49 (0) 1 80-534 16 80 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: [email protected] National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507 National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. DS90C383A/DS90CF383A +3.3V Programmable LVDS Transmitter 24-Bit Flat Panel Display (FPD) Link-65 MHz, +3.3V LVDS Transmitter 24-Bit Flat Panel Display (FPD) Link-65 MHz 12.0 Physical Dimensions