GX4404 Wideband, Monolithic 4x1 Video Multiplexer 2-DATA SHEET CIRCUIT DESCRIPTION FEATURES 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. • 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 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. FUNCTIONAL BLOCK DIAGRAM 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. TALLY OUTPUTS T0 IN 0 T1 T2 T3 X X IN 1 X OUTPUT X IN 2 All logic inputs are TTL and 5V CMOS compatible. Supply voltages can be between ± 4.5 to ± 5.5 volts. X IN 3 APPLICATIONS CHIP SELECT 2 TO 4 DECODER A0 A1 CS • HDTV • Very high quality video switching • Very high density video switching • Computer graphics PIN CONNECTIONS • PCM / data routing matrices T0 IN 0 TRUTH TABLE GND VCC IN 1 A0 T1 A1 CS A1 A0 T2 CS 0 0 0 0 1 IN 2 OUT GND VEE T3 IN 3 16 PIN ‘NARROW’ SOIC (& 16 PIN PDIP) TALLY O/Ps 0 0 1 1 X 0 1 0 1 X OUT T0 T1 IN 0 IN 1 IN 2 IN 3 HI - Z ON * * * * * * * ON * * * ON * * * ON * * * X = DON'T CARE *= T2 T3 OFF (high impedance) ORDERING INFORMATION AVAILABLE PACKAGING Part Number Package Type Temperature Range o 16 pin PDIP GX4404-CDC 16 pin PDIP 0 to 70 C 16 pin SOIC GX4404-CKD 16 pin (N) SOIC o 0 to 70 C Tape 16 pin (N) SOIC GX4404-CTD Tape16 pin (N) SOIC 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 VALUE ± 7.5V Supply Voltage Operating Temperature Range Storage Temperature Range ELECTRICAL CHARACTERISTICS PARAMETER Supply Voltage Supply Current LOGIC TALLY Output Current (VS = ± 5V DC, 0°C ≤ TA ≤ 70°C, R L = 10kΩ, C L = 30 pF, unless otherwise shown.) SYMBOL ±V S + I- CONDITIONS MIN TYP MAX UNITS ± 4.5 - ±5.5 V CS = 0 - 30 37 mA CS = 0 - 30 37 mA Operating Range CS = 1 - 220 300 µA I- CS = 1 - 220 380 µA Analog Output Voltage Swing VOUT Extremes before clipping occurs -2.4 - 2.6 V Analog Input Bias Current IBIAS - 12 - µA Output Offset Voltage VOS -13 -4 7 mV Output Offset Voltage Drift ∆V OS - 35 80 µV/°C Chip Enable Time tON Enable input to appearance of signal - 200 400 ns Chip Disable Time tOFF 0.6 1.2 - µs VIH Enable input to disappearance of signal at output. 1 VIL 0 Logic Input Thresholds Logic Input Current + TA = 25°C IL (VCC -VTALLY) ITALLY = 1mA TALLY Outputs 2.0 - - V - - 0.8 V - - 4 µA 70 150 300 mV 0.030 0.040 0.055 dB Insertion Loss I.L. 1V p-p sine or sq. wave at 100 kHz Bandwidth (-3dB) B.W. small signal CL = 0 pF - 300 - MHz Input Resistance RI N CS = 0, crosspoint on 0.5 - - MΩ Input Capacitance CIN CS = 0, crosspoint on - 1.5 - pF Output Resistance ROUT CS = 0, crosspoint on - 4 - Ω Output Capacitance COUT CS = 1, chip disabled - 3.7 - pF Differential Gain dg ƒ = 3.58 MHz, VIN = 40 IRE - - 0.05 % Differential Phase dp ƒ = 3.58 MHz, VIN = 40 IRE - - 0.04 deg All Hostile Crosstalk XTLKAH 1Vp-p on 3 inputs 4 th input has 10Ω resistor to gnd ƒ=30 MHz - 70 - dB XTLKCD Enabled device on O/P ƒ=100 MHz - 80 - dB DYNAMIC Chip Disabled Crosstalk Slew Rate Gain Spread at 30 MHz Crosspoint Scatter 520 - 43 - 1 -0.5V ≤ VL ≤ +5.5V 2 mA 260° C I STATIC (VEE -1.4) < V A < (V CC +0.3)V Logic Input Voltage -65°C ≤ TS ≤ 150° C I DC VALUE Analog Input Voltage 0°C ≤ TA ≤ 70° C Lead Temperature (Soldering, 10 Sec) SUPPLY PARAMETER +SR V IN = 3V p-p (CL = 0 pF) 250 - - V/µs -SR VIN = 3V p-p (C L = 0 pF) 250 - - V/µs - - ±0.05 dB RS = 75Ω TA = 25°C - - ±0.15 deg ƒ = 3.58 MHz 0°C < TA < 70°C - - ±0.25 deg ∆A V 2 TYPICAL PERFORMANCE CURVES 3.0 -20 2.5 -30 1.5 RS = 30 Ω 1.0 C = 27 pF L -40 -50 0.5 -60 X 0 -70 RS = 75 ΩX -0.5 dB GAIN (dB) 2.0 -1.0 -80 -2.0 -100 -2.5 -110 10 30 100 FREQUENCY (MHz) X X -90 -1.5 -3.0 RS = 10 Ω CHIP OFF ISOLATION R = 10 Ω L -120 300 1 100 10 30 FREQUENCY Fig. 2 All Hostile Crosstalk & Isolation Fig. 1 Flattened Frequency Response 3.0 0.05 2.8 CAPACITANCE (pF) dg dg (%) dp (deg) CL = 0 pF 2.6 0.04 0.03 0.02 dp 0.01 2.4 2.2 SW0,3 ENABLED 2.0 1.8 1.6 1.4 SW1,2 ENABLED 1.2 1.0 0 1 3 5 FREQUENCY (MHz) 1 10 10 FREQUENCY (MHz) 200 Fig. 4 Input Capacitance Fig. 3 Differential Gain & Phase +5V 100 0.1 VIDEO IN 0 15 1 75 ADDRESS BIT 0 14 390 2 VIDEO IN 1 13 ADDRESS BIT 1 12 CHIP SELECT GX4404 PIN 16 4.7k (REPEAT FOR EACH TALLY OUTPUT) 3 75 GX4404 VIDEO IN 2 7 VIDEO OUT 16 4 5 VIDEO IN 3 8 L.E.D. DRIVER 11 6 75 +5V 75 6 dB AMPLIFIER 9 10 TO L.E.D. DRIVERS 75 0.1 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. -5V All resistors in ohms, all capacitors in µF unless otherwise stated Fig. 5 Test Circuit PRELIMINARY DATA SHEET The product is in a preproduction phase and specifications are subject to change without notice. CAUTION ELECTROSTATIC 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. 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. © Copyright July 1991 Gennum Corporation. Revision Date: January 1993. All rights reserved. Printed in Canada. 3 520 - 43 - 1