GENLINX GS9022 TM Digital Video Serializer DATA SHEET FEATURES DEVICE DESCRIPTION • built-in 75 Ω cable driver with two serial outputs The GS9022 is a monolithic bipolar integrated circuit designed to serialize SMPTE 125M and SMPTE 244M bit parallel digital signals as well as other 8 or 10 bit parallel formats. This device performs the functions of sync detection, parallel to serial conversion, data scrambling (using the X9 + X4 +1 algorithm), 10x parallel clock multiplication and conversion of NRZ to NRZI serial data. The data rate is automatically set for SMPTE 259M data rates to 400 Mb/s. Other features include a lock detect output and an internal cable driver capable of driving two 75Ω loads. • standard independent operation • space saving 28 pin PLCC package • 650 mW typical power dissipation (data output driving 75 Ω load). • supports bit rates to 400 Mb/s • accepts 8 bit and 10 bit TTL and CMOS compatible parallel data inputs • single +5 or -5 volt supply The device requires a single +5 volt or -5 volt supply and typically consumes 650 mW of power while driving two 75 Ω loads. The 28 pin PLCC packaging assures a small footprint for the complete encoder function. APPLICATIONS ORDERING INFORMATION • fully compatible with SMPTE 259M serial digital standard • 4ƒSC, 4:2:2 and 360 Mb/s serial digital interfaces for: Video cameras VTRs Signal generators Portable equipment SYNC DETECT DISABLE Part Number Package Temperature GS9022-CPJ GS9022-CTJ 28 pin PLCC 28 pin PLCC Tape O°C to 70°C O°C to 70°C 25 22 PARALLEL 3-12 DATA IN (10 BITS) INPUT LATCH SYNC DETECT P/S CONVERTER RISE TIME CONTROL 23 SERIAL DATA SERIAL DATA SCRAMBLER NRZ NRZI SCLK PLD PCLK LOOP FILTER PHASE FREQUENCY DETECT 13 CHARGE PUMP MUX VCO 17 DIV BY 2 GENERATOR OSCILLATOR DIV BY 10 GENERATOR GS9022 LOCK DETECT 14 LOCK DETECT 19 RVCO 26 28 REGULATOR CAP COSC FUNCTIONAL BLOCK DIAGRAM Revision Date: August 1997 Document No. 521 - 42 - 01 GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. (905) 632-2996 fax: (905) 632-5946 Gennum Japan Corporation: A-302 Miyamae Village, 2-10-42 Miyamae, Suginami-ku, Tokyo 168, Japan tel. (03) 3334-7700 fax (03) 3247-8839 ABSOLUTE MAXIMUM RATINGS PIN CONNECTIONS PARAMETER VALUE/UNITS Supply Voltage 5.5 V Input Voltage Range (any input) -VEE < VI < VCC DC Input Current (any one input) 10 mA Power Dissipation (VS = 5.25 V) PD1 PD0 VCC 4 3 2 VCC CREG VEE COSC 28 27 26 PD2 5 25 SYNC DET. DISABLE PD3 6 24 VCCSD PD4 7 23 SDO 22 SDO 910 mW 0°C ≤ T A ≤ 70°C Operating Temperature Range -65°C ≤ TS ≤150°C Storage Temperature Range 260°C Lead Temperature (soldering 10 seconds) CAUTION GS9022 TOP VIEW PD5 8 PD6 9 21 VEE PD7 10 20 VCC PD8 11 19 RVCO ELECTROSTATIC SENSITIVE DEVICES DO NOT OPEN PACKAGES OR HANDLE EXCEPT AT A STATIC-FREE WORKSTATION 12 13 PD9 PCK IN 14 15 LOCK VEE DET 16 17 18 VCC LF V EE GS9022 - ENCODER DC ELECTRICAL CHARACTERISTICS V CC = 5V, VEE = 0V, TA = 0°C to 70°C unless otherwise shown PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 4.75 5.0 5.25 V Supply Voltage VS Operating Range Power Consumption PD Data outputs driving two 75Ω loads - 650 - mW Supply Current IS Data outputs driving two 75Ω loads - 160 190 mA TTL Inputs-HIGH VIH TA = 25°C 2.0 - - V TTL Inputs-LOW VIL TA = 25°C - - 0.8 V - 2.5 6.0 µA Logic Input Current IIN TTL Outputs-HIGH VOH TA = 25°C 2.4 - - V TTL Outputs-LOW VOL TA = 25°C - - 0.5 V TYP MAX UNITS NOTES T A = 25°C GS9022 - ENCODER AC ELECTRICAL CHARACTERISTICS V CC = 5V, V EE = 0V, TA = 0°C to 70°C, unless otherwise shown PARAMETER SYMBOL CONDITIONS MIN NOTES Serial Data Outputs SDATA, SDATA bit rates BR SDO 100 - 400 Mb/s signal swing VSDO RL = 75Ω 720 800 880 mVp-p rise/fall times t r, tf (20 - 80%) 400 550 800 ps tj 270 Mb/s 240 - ps p-p Note 1 t lock CLoop filt = 0.1µF RLoop filt = 3.9kΩ - 5 - ms Auto Standard 500 - - ps jitter Lock Time COSC = 0.1µF Parallel Data & Clock Inputs risetime tR TA = 25°C setup tSU 3 - - ns hold t HOLD 3 - - ns Note 1: Measured using PCLK as trigger source on 1 GHz oscilloscope 521 - 42 - 01 2 GS9022 Digital Video Serializer - Detailed Device Description The GS9022 Serializer is a bipolar integrated circuit used to convert parallel data into a serial format according to the SMPTE 259M standard. The device encodes both eight and ten bit TTL-compatible parallel signals producing serial data rates up to 400 Mb/s. It operates from a single five volt supply and is packaged in a 28 pin PLCC. The charge pump delivers a 'charge packet' to the loop filter which is proportional to the system phase error. Internal voltage clamps are used to constrain the loop filter voltage between approximately 1.8 and 3.4 volts. The VCO, constructed from a current-controlled multivibrator, features operation in excess of 400 Mb/s and a wide pull range (≈ ± 40% of centre frequency). Functional blocks within the device include the input latches, sync detector, parallel to serial converter, scrambler, NRZ to NRZI converter, internal cable driver, PLL for 10 x parallel clock multiplication and lock detect. VCO Centre Frequency Selection The wide VCO pull range allows the PLL to compensate for variations in device processing, temperature variations and changes in power supply voltage, without external adjustment. A single external resistor is used to set the VCO current for all standards. The parallel data (PD0-PD9) and parallel clock (PCKIN) are applied via pins 3 through 13 respectively. Sync Detector The Sync Detector looks for the reserved words 000-003 and 3FC-3FF, in ten bit hexadecimal, or 00 and FF in eight bit hexadecimal, used in the TRS-ID sync word. When the occurrence of either all zeros or all ones at inputs PD2-PD9 is detected, the lower two bits PD0 and PD1 are forced to zeros or ones, respectively. This makes the system compatible with eight or ten bit data. For non - SMPTE standard parallel data, a logic input, Sync Detect Disable (25) is available to disable this feature. The COSC pin is used to configure the VCO of the GS9022 in one of three modes, as shown below: COSC Mode 0.1µF to GND Auto Standard 10k Resistor to VCC ƒ/2 ON 10k Resistor to GND ƒ/2 OFF In auto standard mode, the capacitor sets the sweep rate at which the VCO toggles between ƒ and ƒ/2. Scrambler The Scrambler is a linear feedback shift register used to pseudo-randomize the incoming serial data according to the fixed polynomial (X9+X4+1). This minimizes the DC component in the output serial data stream. The NRZ to NRZI converter uses another polynomial (X+1) to convert a long sequence of ones to a series of transitions, minimizing polarity effects. The ƒ/2 ON and ƒ/2 OFF modes are used to configure the GS9022 VCO for single standard operation. The lock detect circuit disables the serial data output when the loop is not locked. The Lock Detect output is available from pin 14 and is HIGH when the loop is locked. The true and complement serial data, SDO and SDO are available from pins 22 and 23. These outputs will drive two 75 Ω co-axial cables with SMPTE level serial digital video signals. Phase Locked Loop The PLL performs parallel clock multiplication and provides the timing signal for the serializer. It is composed of a phase/frequency detector, charge pump, VCO , a divide-by-ten counter, and a divide by two counter. The phase/frequency detector allows a wider capture range and faster lock time than that which can be achieved with a phase discriminator alone. The discrimination of frequency also eliminates harmonic locking. With this type of discriminator, the PLL can be over-damped for good stability without sacrificing lock time. 3 521 - 42 - 01 GS9022 PIN DESCRIPTIONS PIN NO. SYMBOL TYPE DESCRIPTION 1 VCC Power Supply: Most positive power supply connection for the PLL and Scrambler. 2 VCC Power Supply: Most positive power supply connection for the parallel data inputs and P/S converter. 3-12 PD0-PD9 I TTL level inputs of the parallel data words. PD0 is the LSB and PD9 is the MSB. 13 PCKIN I TTL level input of the parallel clock. 14 LOCK DET O TTL level output which goes high when the internal PLL is locked. 15 VEE Power Supply: Most negative power supply connection. 16 VCC Power Supply: Most positive power supply connection for the PLL and Scrambler. 17 LF 18 VEE 19 RVCO 20 VCC Power Supply: Most positive power supply connection for the PLL and Scrambler. 21 VEE Power Supply: Most negative power supply connection. 22, 23 SDO, SDO 24 VCCSD 25 SYNC DET DISABLE I TTL level input that disables the internal sync detector when high. This allows the GS9022 to serialize 8 or 10 bit non-SMPTE standard parallel data. 26 COSC I Toggles VCO between ƒ and ƒ/2. 27 VEE I Power Supply: Most negative power supply connection. 28 CREG I Compensation capacitor for internal voltage regulator that requires decoupling with a 0.1 µF capacitor located as close as possible to the pin in series with an 820 Ω Resistor. 521 - 42 - 01 I Connection for the R-C loop filter components. Power Supply: Most negative power supply connection. I I VCO frequency setting resistor. A 1% resistor is required. 75 Ω cable driver outputs (true and inverse). Power Supply: Most positive power supply for cable driver outputs. 4 INPUT / OUTPUT CIRCUITS VCC VCC 1k 1k 10k VR1 PINS 3-12 13, 25 LOCK DETECT PIN 14 VEE VEE Fig. 2 Lock Detect Fig. 1 Sync Detect Disable, Parallel Data, Parallel Clock VCC VCC 400 400 tCLKL = tCLKH 50% PARALLEL CLOCK PLCK VOUT PIN 22 PARALLEL DATA PDn VCC tSU tHOLD Fig. 4 Input Clock / Data Timing VOUT PIN 23 Fig. 3 Output Circuit 5 521 - 42 - 01 TYPICAL PERFORMANCE CURVES (VS = 5V, TA = 25° C unless otherwise shown) 810 400 RVCO =2.2k 350 800 SERIAL OUTPUT (mV) Auto Standard Mode JITTER p-p (ps) 300 250 200 150 790 780 770 100 50 760 50 100 150 200 250 300 350 400 450 0 10 DATA RATE (Mbps) 40 50 60 70 Fig. 6 Serial Data Output Level vs Temperature 600 3.1 RVCO =2.2k 550 360 Mbps 3.0 500 LOOP FILTER VOLTAGE (V) VCO FREQUENCY (MHz) 30 AMBIENT TEMPERATURE (°C) Fig. 5 Output Jitter ƒ/2 OFF 450 400 350 300 250 ƒ/2 ON 200 150 100 Auto Standard Mode 2.7 2.6 143 Mbps 2.5 2.4 2.3 2.2 2.4 2.6 2.8 3.0 3.2 3.4 RVCO =2.2k 2.8 0 2.0 177 Mbps 2.9 50 270 Mbps 0 10 20 30 40 50 60 TEMPERATURE (°C) TYPICAL LOOP FILTER VOLTAGE (V) Fig. 8 Loop Filter Voltage vs Temperature Fig. 7 VCO Frequency vs Loop Filter Voltage 521 - 42 - 01 20 6 70 APPLICATION CIRUIT Figure 9 shows a typical application circuit of the GS9022 driving a 75Ω cable. VCC + 0.1 10 5k 1 2 16 20 VCC VCC VCC DATA 0 100 3 100 4 100 5 100 6 DATA 1 DATA 2 DATA 3 DATA 4 DATA 5 100 7 100 8 100 DATA 6 DATA 7 100 10 100 11 100 12 DATA 8 DATA 9 CLOCK 9 100 10pF 13 24 VCC 14 VCCSD PD 0 PD 1 PD 2 PD 3 PD 4 25 L O C K S Y N SDO C D E T E C T D I S 1.0 22 75 1p8 23 1.0 68 150 1p8 SDO 150 PD 5 68 75 GS9022 PD 6 VCC PD 7 PD 8 1M PD 9 17 C R E G PCK IN VEE 15 VEE VEE 18 21 27 VEE 28 R V C O C O S C 26 LF 3.9k 19 0.1 0.1 0.1 All resistors in ohms, all capacitors in microfarads unless otherwise stated. 0.1 2k2 1% 820Ω Fig. 9 GS9022 Application Circuit DOCUMENT IDENTIFICATION PRODUCT PROPOSAL This data has been compiled for market investigation purposes only, and does not constitute an offer for sale. ADVANCE INFORMATION NOTE This product is in development phase and specifications are subject to change without notice. Gennum reserves the right to remove the product at any time. Listing the product does not constitute an offer for sale. PRELIMINARY The product is in a preproduction phase and specifications are subject to change without notice. DATA SHEET The product is in production. Gennum reserves the right to make changes at any time to improve reliability, function or design, in order to provide the best product possible. REVISION NOTE: Changes to Figure 9. Gennum Corporation assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement. © Copyright APRIL 1995 Gennum Corporation. All rights reserved. Printed in Canada. 7 521 - 42 - 01