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| GX4404 Wideband, Monolithic 4x1 Video Multiplexer 2-DATA SHEET FEATURES * low differential phase and gain * wide bandwidth, 200 MHz at -3 dB * small switching transient * 4.5 to 5.5 volts supplies * individual TALLY outputs CIRCUIT DESCRIPTION The GX4404 is a wideband video multiplexer implemented in bipolar technology. This device is characterized by excellent differential phase and gain in the enabled state, very high off-isolation in the disabled state. Fully buffered unilateral signal paths ensure negligible output to input feedback, while delivering minimal output switching transients through make-before-break switching. For use in NxM routing matrices, these devices feature a very high, nearly constant input impedance coupled with high output impedance in the disabled state. This allows multiple devices to be paralleled at the inputs and outputs without additional circuitry. The chip is disabled when a logic HIGH is applied to the CS control pin. In this case, regardless of the ADDRESS data, the output of the device assumes a high impedance state. Individual PNP to VCC TALLY outputs provide positive indication of crosspoint selection. All logic inputs are TTL and 5V CMOS compatible. Supply voltages can be between 4.5 to 5.5 volts. FUNCTIONAL BLOCK DIAGRAM TALLY OUTPUTS T0 T1 T2 T3 IN 0 IN 1 IN 2 IN 3 X X X X X OUTPUT APPLICATIONS 2 TO 4 DECODER CHIP SELECT * HDTV * Very high quality video switching * Very high density video switching * Computer graphics A0 A1 CS PIN CONNECTIONS IN 0 GND IN 1 T1 T2 IN 2 GND IN 3 T0 VCC A0 A1 CS OUT VEE T3 * PCM / data routing matrices TRUTH TABLE TALLY O/Ps CS A1 A0 OUT T0 T1 T2 T3 0 0 0 0 1 0 0 1 1 X 0 1 0 1 X IN 0 IN 1 IN 2 IN 3 HI - Z ON * * * * * * * ON * * * ON * * * ON * * * 16 PIN `NARROW' SOIC (& 16 PIN PDIP) X = DON'T CARE *= OFF (high impedance) ORDERING INFORMATION AVAILABLE PACKAGING 16 pin PDIP 16 pin SOIC Tape 16 pin (N) SOIC Part Number Package Type Temperature Range o GX4404-CDC GX4404-CKD GX4404-CTD 16 pin PDIP 16 pin (N) SOIC Tape16 pin (N) SOIC 0 to 70 C o 0 to 70 C o 0 to 70 C Document No. 520 - 43 - 1 GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. (905) 632-2996 fax: (905) 632-5946 Japan Branch: A-302 Miyamae Village, 2-10-42 Miyamae, Suginami-ku, Tokyo 168, Japan tel. (03) 3334-7700 fax (03) 3247-8839 ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage Operating Temperature Range Storage Temperature Range Lead Temperature (Soldering, 10 Sec) VALUE 7.5V 0C TA 70 C -65C TS 150 C 260 C PARAMETER Analog Input Voltage Logic Input Voltage TALLY Output Current VALUE (VEE -1.4) < V A < (V CC +0.3)V -0.5V VL +5.5V 2 mA ELECTRICAL CHARACTERISTICS PARAMETER (VS = 5V DC, 0C TA 70C, R L = 10k, C L = 30 pF, unless otherwise shown.) SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage DC SUPPLY Supply Current V S I + Operating Range CS = 0 CS = 0 CS = 1 CS = 1 Extremes before clipping occurs 4.5 -2.4 - 30 30 220 220 12 -4 35 200 1.2 150 0.040 300 1.5 4 3.7 - 5.5 37 37 300 380 2.6 7 80 400 0.8 4 300 0.055 0.05 0.04 V mA mA A A V A mV V/C ns s V V A mV dB MHz M pF pF % deg II + IAnalog Output Voltage Swing STATIC Analog Input Bias Current Output Offset Voltage Output Offset Voltage Drift Chip Enable Time LOGIC Chip Disable Time Logic Input Thresholds VOUT IBIAS VOS V OS tON tOFF VIH VIL Logic Input Current TALLY Outputs Insertion Loss Bandwidth (-3dB) Input Resistance DYNAMIC Input Capacitance Output Resistance Output Capacitance Differential Gain Differential Phase All Hostile Crosstalk I.L. B.W. RIN CIN ROUT COUT dg dp XTLKAH XTLKCD +SR -SR Gain Spread at 30 MHz Crosspoint Scatter A V IL TA = 25C -13 - Enable input to appearance of signal Enable input to disappearance of signal at output. 1 0 0.6 2.0 - (VCC -VTALLY) ITALLY = 1mA 1V p-p sine or sq. wave at 100 kHz small signal CL = 0 pF CS = 0, crosspoint on CS = 0, crosspoint on CS = 0, crosspoint on CS = 1, chip disabled = 3.58 MHz, VIN = 40 IRE = 3.58 MHz, VIN = 40 IRE 1Vp-p on 3 inputs 4 th input has 10 resistor to gnd =30 MHz Enabled device on O/P =100 MHz V IN = 3V p-p (CL = 0 pF) VIN = 3V p-p (C L = 0 pF) 70 0.030 0.5 - 250 250 - 70 80 - 0.05 0.15 0.25 dB dB V/s V/s dB deg deg Chip Disabled Crosstalk Slew Rate RS = 75 = 3.58 MHz TA = 25C 0C < TA < 70C - 520 - 43 - 1 2 TYPICAL PERFORMANCE CURVES 3.0 2.5 2.0 1.5 1.0 GAIN (dB) 0.5 0 dB -0.5 -1.0 -1.5 -2.0 -2.5 -3.0 10 30 100 FREQUENCY (MHz) 300 RS = 30 C = 27 pF L -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 1 100 10 30 FREQUENCY X RS = 10 X RS = 75 X X CHIP OFF ISOLATION R = 10 L Fig. 1 Flattened Frequency Response 0.05 3.0 2.8 0.04 dg CAPACITANCE (pF) dg (%) dp (deg) 0.03 2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2 0 1 3 5 FREQUENCY (MHz) 10 1.0 1 Fig. 2 All Hostile Crosstalk & Isolation CL = 0 pF SW0,3 ENABLED 0.02 dp 0.01 SW1,2 ENABLED 10 FREQUENCY (MHz) 100 200 Fig. 3 Differential Gain & Phase +5V 0.1 Fig. 4 Input Capacitance VIDEO IN 0 1 75 VIDEO IN 1 3 75 12 CHIP SELECT 2 13 ADDRESS BIT 1 15 14 ADDRESS BIT 0 390 GX4404 PIN 16 4.7k +5V (REPEAT FOR EACH TALLY OUTPUT) GX4404 VIDEO IN 2 6 75 VIDEO IN 3 8 75 0.1 -5V 10 7 11 16 4 5 9 TO L.E.D. DRIVERS VIDEO OUT 75 L.E.D. DRIVER 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. 6 dB AMPLIFIER All resistors in ohms, all capacitors in F unless otherwise stated Fig. 5 Test Circuit CAUTION ELECTROSTATIC SENSITIVE DEVICES DO NOT OPEN PACKAGES OR HANDLE EXCEPT AT A STATIC-FREE WORKSTATION Gennum Corporation assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement. (c) Copyright July 1991 Gennum Corporation. Revision Date: January 1993. All rights reserved. Printed in Canada. 3 520 - 43 - 1 |
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