GX4201 Wideband, Monolithic 1x1 Video Crosspoint Switch DATA SHEET FEATURES CIRCUIT DESCRIPTION • -3 dB bandwidth, 300 MHz with CL = 0 pF The GX4201 is a wideband 1x1 video crosspoint implemented in bipolar monolithic technology. The device is characterized by excellent differential gain and phase in the enabled state, and very high off-isolation in the disabled state. The fully buffered unilateral signal path ensures negligible output to input feedback while delivering minimal output switching transients through make-before-break switching. • off isolation at 100 MHz, 80 dB • differential phase and gain at 4.43 MHz, 0.01° & 0.02% • 800 µW disabled power consumption • input signal levels from -2 V to +3 V • logic input compatible with TTL and 5 V CMOS • open collector TALLY output FUNCTIONAL BLOCK DIAGRAM TALLY X IN OUT For use in NxM routing matrices, the device features a very high, nearly constant input impedance, coupled with very high output impedance in the disabled state. This allows multiple GX4201's to be paralleled at the input and output without additional circuitry. An open collector PNP to VCC TALLY output provides indication of crosspoint selection. To maximize system bandwidth, an external current source is used to bias the output device of the crosspoint. One external current source is required per output bus. For less demanding applications, a load resistor can be used in place of the output current source, causing a slight increase in differential phase. Non-additive mixing will occur on the output bus if more than one paralleled GX4201 is enabled at a time. The GX4201 is one of a series of wideband video crosspoints utilizing Gennum's proprietary LSI process. EN PATENT PENDING TRUTH TABLE APPLICATIONS EN OUT 0 HIGH Z OFF 1 IN ON • • • • • TALLY very high quality video switching HDTV computer graphics RF switching/routing PCM/data routing ABSOLUTE MAXIMUM RATINGS Parameter Value Supply Voltage ±7.5 V 0° C ≤ TA ≤ 70° C Operating Temperature Range Storage Temperature Range Logic Input Voltage Output Load Current High Level TALLY Output Current TOP VIEW -65° C ≤ TS ≤ 150° C Lead Temperature (Soldering, 10 Sec) Analog Input Voltage PIN CONNECTIONS 260° C -5.5 V ≤ VIN ≤ 5.5 V -0.5 V ≤ VL ≤ 5.5 V 12mA PIN 1 EN EN V EE 1 8 IN V CC 0UT GND 4 5 GND TALLY 8 GND V EE IN VCC GND OUT 4 8 PIN SOIC 5 TALLY 8 PIN DIP 2 mA Document No. 510 - 74 - 5 GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. (905) 632-2996 fax: (905) 632-2055 Japan Branch: B-201 Miyamae Village, 2-10-42, Miyamae, Suginami-ku, Tokyo 168, Japan tel. (03) 3247-8838 fax (03) 3247-8839 ELECTRICAL CHARACTERISTICS PARAMETER Supply Voltage SYMBOL CONDITIONS MIN TYP ± 4.5 ±5 ± 5.5 V EN=1 - 13.5 17 mA EN=0 - 80 140 µA EN=1 - 12.5 16 mA EN=0 - 80 140 µA occurs -2 - 3 V - 12 - µA TA = 25°C -10 - 10 mV - -25 -80 µV/°C - 200 400 ns 0.5 1.0 - µs ± VS I+ DC SUPPLY (VS = ± 5V DC, 0°C < TA < 70°C, I L = 6 mA) Supply Current (not including external I- current load) Analog Output VOUT Voltage Swing STATIC Analog Input Bias MAX Extremes before clipping I BIAS Current Output Offset Voltage VOS Output Offset Voltage ∆VOS / ∆T UNITS DriftCrosspoint t ON Control input to appearance of signal at output. tOFF Control input to disappearance Turn-On Time LOGIC Crosspoint Turn-Off Time of signal at output. Logic Input VIH 1 2.0 - - V Thresholds VIL 0 - - 0.8 V Enable I BIAS(EN) EN = 0 - 0.3 2 µA V Bias Current DYNAMIC TALLY Output VOH EN = 1, I O = 1mA 4.80 4.89 4.93 Insertion Loss I.L. 1V p-p sine or sq.wave,TA=25 oC at 100 kHz R L=100K, C L =30pF 0.015 0.025 0.040 dB Bandwidth (-3dB) See Fig. 1 Input Resistance B.W. small signal CL = 0 pF - 300 - MHz RIN EN = 1 1.0 3.0 - MΩ Input Capacitance CIN EN = 0 - 1.1 - pF Output Resistance ROUT EN = 1 - 7 - Ω Output Capacitance See Fig. 5 Differential Gain COUT EN = 0 - 1.1 - pF dg at 3.58 MHz - - 0.04 % Differential Phase See Fig. 6 Off Isolation See Fig. 4 dp VIN = 40 IRE - - 0.04 degrees Enabled GX4201 on output - 80 - dB Slew Rate +SR 250 400 - 250 350 - ƒ = 100 MHz VIN = 1V p-p -SR VIN = 3V p-p (CL = 0 pF) ORDERING INFORMATION PART NUMBER PACKAGE TYPE TEMPERATURE RANGE GX4201-CKA 8 PIN SOIC 0° to 70°C GX4201-CDA 8 PIN DIP 0° to 70°C GX4201-CTA 8 PIN SOIC TAPE 0° to 70°C 2 510 - 74 - 5 V/µs TYPICAL PERFORMANCE CURVES OF THE GX4201 For all graphs, VS = ± 5 V DC and TA = 25°C. The curves shown below represent typical batch sampled results. Phase (degrees) Gain (dB) 24 0 21 -0.3 18 -0.6 Load Capacitance 10 pF 15 10 pF -0.9 22 pF 12 -1.2 9 -1.5 47 pF 6 22 pF -1.8 82 pF 47 pF 3 -2.1 0 -2.4 -3 -2.7 82 pF -6 -3.0 1 10 100 1 1K 2 Frequency (MHz) 3 4 5 6 7 8 9 10 Frequency (MHz) Fig. 1 Gain vs Frequency Fig. 2 Phase vs Frequency Off Isolation (dB) Gain (dB) 0.1 120 0.05 V IN = 1V p-p 0 110 -0.05 R L = 10Ω -0.1 100 External Series Resistance = 30 Ω CL = 33 pF -0.15 -0.2 Load = 1 xpt on O/P to GND 90 -0.25 (See test circuits) -0.3 80 -0.35 -0.4 70 1 10 100 10 1K Frequency (MHz) 20 30 50 80 100 Frequency (MHz) Fig. 3 Gain vs Frequency Fig. 4 Off Isolation vs Frequency continued over 3 510 - 74 - 5 Input Cap. (pF) Disabled O/P Cap. (pF) 1.4 1.8 1.7 1.6 EN = 1 1.3 CL = 30 pF 1.5 1.4 1.2 1.3 1.2 EN = 0 1.1 1.1 1.0 0.9 1.0 -2 .0 0.8 1 10 100 1K -1.5 -1.0 -0.5 0 +0.5 +1.0 Frequency (MHz) Output Bias (V) Fig. 5 CIN vs Frequency Fig. 6 COUT vs Bias Diff. Gain Diff. Phase +1.5 +2.0 Diff. Gain Diff. Phase +0.05 +0.05 V IN = 40 IRE at 4.43 MHz +0.04 V LUM = VBLANK + 0.714 V +0.03 V IN = 40 IRE at 4.43 MHz Blanking Level is clamped to VBIAS V LUM = VBLANK + 0.714 V +0.04 Blanking Level 0 V DC +0.02 dg % R = 10 kΩ L +0.01 dp ° +0.03 dg % 0 -0.01 +0.02 R L = 10 K -0.01 dp ° -0.03 +0.01 -0.04 -0.05 -1.6 -1.2 -0.8 -0.4 0 +0.4 0 +0.8 Input Bias (V) 1 2 3 4 5 6 7 8 9 10 Frequency (MHz) Fig. 7 dg/dp vs Input Bias Fig. 8 dg/dp vs Frequency Diff. Gain Diff. Phase -0.18 -0.16 -0.14 ƒ = 4.43 MHz, 40 IRE Blanking Level 0V DC -0.12 dg % -0.10 -0.08 -0.06 -0.04 dp ° -0.02 dp ° 0 dg % +0.02 100 1K RL (Ω) Fig. 9 dg/dp vs RL 510 - 74 - 5 4 10K 1 8 -5.5 V 2 7 +5.5 V 3 6 4 5 + 10 5.5 K 470 + 10 Fig. 10 Burn-in Test Circuit 1 8 -5 V 2 7 +5 V 3 6 4 5 + + 10 V CRTL 200 mV/div 10 VOUT VCTRL 1 8 2 7 3 6 4 5 6mA 10pF VOUT 10 mV/div -5 V 1 µs/div 74LS02 Fig. 11a Switching Transient Test Circuit Fig. 11b Switching Transient OFF DEVICE -5 V +5 V 0.1 0.1 1 8 2 7 3 6 4 INPUT 1 OUTPUT 0.1 0.1 2 7 +5 V 3 6 4 5 5 ON DEVICE 1 8 2 7 3 6 4 5 IL 1K 0.1 0.1 2 x BFR96 180 -5 V 180 ADJUST FOR IL = 6mA 8 -5 V INPUT OUTPUT 1K IL LOAD 10 2 x BFR96 180 0.1 NOTE: Off-isolation can be increased by eliminating the signal path through the power supplies. This is demonstrated by replacing the enabled crosspoint with a 10Ω load resistor as shown in the passive load circuit. -5 V Active Load 180 ADJUST FOR IL = 6mA 0.1 Passive Load Fig. 12 Off-isolation Test Circuits All capacitors in farads, all resistors in ohms unless otherwise stated. 5 510 - 74 - 5 +5 V EN BA EN AA NOTE 1 * 1 8 1 2 7 2 7 3 6 3 6 5 4 5 4 8 Repeat for Each Crosspoint TALLY Output 4.7 K OUT A EN BB EN AB 1 8 1 8 2 7 2 7 3 6 3 6 4 5 4 5 6mA NOTE 2 -5 V OUT B - IN A + - IN B + 6mA 5V 5V NOTE 2 Fig. 13 Application Circuit 2 x 2 Matrix using Four GX4201 All capacitors in µF, all resistors in Ω unless otherwise shown. NOTES: 1. -5 V IC * All decoupling capacitors are 0.1 µF, 50 V. R 1.8 K 680 2. 66mA can be implemented by the following circuit. Choose a transistor with ß / ƒ at 6 mA T ƒ is ≥ 800MHz. T 100 0.1 -5 V 3. Alternatively, an 820Ω resistor may be used. The insertion loss will be increased to 0.1 dB. AVAILABLE PACKAGING 8 pin DIP 8 pin SOIC - TAPE 8 pin SOIC CAUTION ELECTROSTATIC SENSITIVE DEVICES DO NOT OPEN PACKAGES OR HANDLE EXCEPT AT A STATIC-FREE WORKSTATION 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 DATA SHEET 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. 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 AUG.1989 Gennum Corporation. 6 510 - 74 - 5 Revision Date: January 1993. All rights reserved. Printed in Canada.