data sheet features ? low differential phase and gain ? wide bandwidth, 100 mhz at -1 db (flattened) ? small switching transient ? 4.5 to 11 volts supplies functional block diagram circuit description the GX4314 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 and fully buffered unilateral signal path. make-before-break switching assures virtually glitch-free switching. for use in nxm routing matrices, the GX4314 features 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. logic inputs are ttl and 5v cmos compatible, providing address and chip select functions. the operation of the devices is described in the truth table below. the wideband GX4314 is pin for pin compatible with the high performance gx414, extending the flat frequency response characteristics from 50 to 100 mhz. applications ? hdtv ? very high quality video switching ? very high density video switching ? computer graphics ? pcm / data routing part number package type temperature range GX4314 - cdb 14 pin pdip 0 to 70 o c GX4314 - ckb 14 pin soic 0 to 70 o c GX4314 - ckc 16 pin soic 0 to 70 o c GX4314 - ctc tape 16 pin soic 0 to 70 o c ordering information truth table x = don't care 0 0 0 in 0 0 0 1 in 1 0 1 0 in 2 0 1 1 in 3 1 x x hi - z cs a1 a0 output document no. 520 - 42 - 4 caution electrostatic sensitive devices do not open packages or handle except at a static-free workstation available packaging 14 pin pdip 16 pin soic 14 pin soic tape 16 pin soic 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 GX4314 wideband, monolithic 4x1 video multiplexer in 0 in 1 in 2 in 3 2 to 4 decoder logic output chip select a1 a0 cs GX4314 x x x x x
2 520 - 42 - 4 supply voltage v s operating range 4.5 - 11 v dc i + cs = 0 - 22 25 ma supply supply current i - cs = 0 - 22 25 ma i + cs = 1 - 270 350 m a i - cs = 1 - 350 600 m a analog output voltage swing v out extremes before clipping occurs -2.4 - 2.6 v static analog input bias current i bias -11 - m a output offset voltage v os t a = 25 c 7 14 21 mv output offset voltage drift d v os - 160 - m v/ c chip enable time t on enable input to appearance of signal - 200 400 ns logic chip disable time t off enable input to disappearance 0.6 1.2 - m s of signal at output. logic input thresholds v ih 1 2.0 - - v v il 0 - - 0.8 v logic input current i l -- 4 m a insertion loss i.l. 1v p-p sine or sq. wave at 100 khz 0.025 0.038 0.050 db bandwidth (-3db) b.w. small signal c l = 0 pf - 300 - mhz input resistance r in cs = 0, crosspoint on 0.5 - - m w dynamic input capacitance c in cs = 0, crosspoint on - 1.4 - pf output resistance r out cs = 0, crosspoint on - 6 - w output capacitance c out cs = 1, chip disabled - 2.6 - pf differential gain dg ? = 3.58 mhz, v in = 40 ire - - 0.03 % differential phase dp ? = 3.58 mhz, v in = 40 ire - - 0.02 deg all hostile crosstalk xtlk ah 1vp-p on 3 inputs 4 th input has 10 w resistor to gnd ?=30 mhz - 70 - db chip disabled crosstalk xtlk cd enabled device on o/p ?=100 mhz - 80 - db slew rate +sr v in = 1v p-p (c l = 10 pf) 1000 1500 - v/ m s -sr v in =1v p-p (c l = 10 pf) 440 660 - v/ m s gain spread at 30 mhz d a v - - 0.05 db crosspoint scatter r s = 75 w t a = 25 o c- - 0.15 deg ? = 3.58 mhz 0 o cGX4314 electrical characteristics (v s = 8v dc, 0 c t a 70 c, r l = 10k w , c l = 30 pf, unless otherwise shown.) parameter symbol conditions min typ max units absolute maximum ratings pin connections 14 pin dip & 14 pin narrow soic
3 520 - 42 - 4 1 100 1 100 isolation & xtalk (db) gain (db) fig. 1 flattened frequency response typical performance curves for GX4314 r in =10 w r in =75 w fig. 2 all hostile crosstalk & isolation r s = 30 w c l = 27 pf 1 10 100 frequency (mhz) chip off - isolation r l =10 w 1 10 100 frequency (mhz) 3 2.8 2.6 2.4 2.2 2 capacitance (pf) 2 1.8 1.6 1.4 1.2 1 capacitance (pf) fig. 4 output capacitance fig. 3 input capacitance v s = 4.5v v s = 8v v s = 11v sw0, sw3 enabled sw1, sw2 enabled c l = 0 pf -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 bias voltage (v) 0.030 0.025 0.020 0.015 0.010 0.005 0 dg dp dg ( % ), dp ( deg ) fig. 5 differential gain & phase supply voltage (v) 15 12 9 6 3 0 0 20 40 60 80 100 120 ambient temperature ( c) 16 pin 300 mil soic 14 pin 150 mil soic 14 pin pdip -20 -40 -60 -80 -100 -120 0.1 0 -0.2 -0.4 -0.6 -0.8 -1.0 1 10 100 200 frequency (mhz) 1 3 5 10 frequency (mhz) fig. 6 safe operating area for GX4314 (all packages) note: curves are based on 25 ma max. supply current and 130 c max. junction temperature.
4 520 - 42 - 4 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 july1991 gennum corporation. revision date: december 1993. all rights reserved. GX4314 video in 1 video in 3 75 1 2 10 3 0.1 a1 cs 4 5 9 6 14 8 7 12 13 +5v 11 clc110 0.1 a0 video in 2 video in 0 10k 75 75 75 1 video
out -5v nc 8 5 4 fig. 7 test circuit all resistors in ohms, all capacitors in microfarads unless otherwise stated. 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. binary address
decoder video inputs GX4314 switches v 0 v 1 v 2 v 3 75 75 75 75 0.1 1 2 6 5 4 3 7 9 10 11 12 13 14 8 1 2 6 5 4 3 7 9 10 11 12 13 14 8 1 2 6 5 4 3 7 9 10 11 12 13 14 8 1 2 6 5 4 3 7 9 10 11 12 13 14 8 v 4 v 5 v 6 v 7 75 75 75 75 v 8 v 9 v 10 v 11 75 75 75 75 v 12 v 13 v14 v15 75 75 75 75 0.1 0.1 0.1 0.1 0.1 0.1 0.1 -8v -8v +8v -8v +8v +8v a 0 a 1 330 2-10pf in 0 in 1 in 2 in 3 +v a 0 a 1 cs out nc -v in 0 in 1 in 2 in 3 +v a 0 a 1 cs out nc -v in 0 gnd in 2 in 3 +v a 0 a 1 out nc -v cs in 0 in 1 in 2 in 3 +v a 0 a 1 cs out nc -v a 2 enable a 3 4 5 6 7 -8v +8v gnd gnd gnd gnd gnd gnd gnd gnd gnd 2 3 1 1 2 74hc139 gnd gnd in 1 +5v 0.1 8 16 +5v 0.1 - + 3 2 4 7 -5v 0.1 75 500 6 250 300 100 -clc 410 (comlinear) video
output fig. 8 16 x 1 video multiplexer circuit
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