www.rfm.com e-mail: info@rfm.com page 1 of 3 ? 2011 by rf monolithics, inc. HX1081 6/20/11 electrical characteristics characteristic sym notes minimum typical maximum units operating frequency absolute frequency f o 1, 7 1089.75 1090.00 1090.25 mhz tolerance from 1090.0 mhz ? f o 250 khz rf output power p o 3, 6 +10 +12 +13 dbm start-up time 2, 8 500 ns discrete spurious second harmonics 2, 3, 4 -25 -20 dbc third and higher harmonics -35 -30 nonharmonic < -100 -80 ssb phase noise 1 khz offset 2, 3, 4 -90 dbc/hz 10 khz offset -110 rf impedance nominal impedance z o 350 ? operating load vswr g l 3, 5 1.5:1 dc power supply operating/enable voltage v cc 3, 6 3.0 3.3 3.7 vdc operating current i cc 37 40 ma operating ambient temperature t a 3, 6 -55 +105 c lid symbolization (yy=year, ww=week) rfm HX1081 yyww ? saw frequency stabilized fundamental-mode oscillation at 1090.0 mhz designed for atc/tcas transponder applications complies with directive 2002/95/ec (rohs) the frequency of this oscillator is stabilized by uhf surface-acoustic-wave (saw) tech- nology, providing excellent performance in a compact, rugged oscillator operating at the fundamental frequency of 1090.0 mhz. the highly-reliable HX1081 is designed for use in mode-s air traffic control transponders/traffic alert and collision avoidance sys- tems (tcas). absolute maximum ratings rating value units dc supply voltage 3.0 to +3.7 vdc ambient temperature powered -55 to +105 c storage -55 to +125 1090.0 mhz saw oscillator HX1081 caution: electrostatic sensitive device. observe precautions for handling. cocom caution: approval by the u.s. department of commerce is required prior to export of this device. notes: 1. one or more of the following united states patents apply: 4,760,352; 5,787,117; and 7,260,375. 2. unless noted otherwise, all specifications are listed at t a = +25 2 c, v cc = nominal voltage 0.01 vdc, and load impedance = 50 ? with vswr 1.5:1. 3. the design, manufacturing process, and specifications of this device are subject to change without notice. 4. applies to oscillator only and not to sidebands caused by external electrical or mechanical sources. (dedicated external volt age regulation with low-frequency filtering for the dc power supply and proper circuit board layout are recommended for optimum spectral purity.) 5. for specified maximum operating load vswr,any angle, at f o . no instability or damage will occur for any passive load impedance. 6. for any combination of v cc and t a within the specified operating ranges. 7. applies for any combination of note 5 and 6 conditions. 8. start-up time is defined as the time from when 90% of vcc is applied to the enable pin until the rf output reaches 90% of its steady-state output level.
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a b c d e f h g i dimension mm inches min nom max min nom max a 10.6 10.7 10.9 0.417 0.423 0.429 b 6.7 6.8 7.0 0.264 0.270 0.276 c 1.5 1.8 2.0 0.061 0.070 0.079 d 1.4 1.7 1.9 0.058 0.066 0.074 e 3.2 3.3 3.4 0.125 0.130 0.135 f 1.8 1.9 2.0 0.069 0.074 0.079 g 0.4 0.6 0.6 0.015 0.020 0.025 h 0.9 1.0 1.1 0.035 0.040 0.045 i 1.7 1.8 1.9 0.065 0.070 0.075 sm3-20h pcb pad layout dimensions in inches .100 .380 0.000 0 . 0 0 0 .075 .115 .155 .195 .235 .275 .315 .355 . 0 9 0 .455 . 1 2 2 5 . 1 6 2 5 . 1 4 7 5 . 1 8 7 5 . 2 2 0 . 3 1 0
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" # $ % & ' ( ( ) * + $ " " ( ' ) * + ' ref description part number manufacturer c1 capacitor, 0. 1 f, 0402 smd grm15 5r61a104ka01b murata l1 ferrite bead, 300 ohm, 0402 smd 74279272 wurth electonics, inc. l2 inductor, 1.8 nh 0402 smd ll1005-fhl1n8s toko r1 resistor, 4.99k, 0402 smd, 1 /16 w, 5% rr05 10p-4991-d susumu r2 thermistor, 0805 smd, 1k, +4110 ppm tfpt0805l 1001 fv vishay da le u1 1090 mhz saw oscillator, smd HX1081 rf monolithics, inc. pi n name description 1 gnd oscillator ground 2 vcc power input, +3.3 v nominal. this pin must be supplied through a ferrite bead of 3 00 o hm no minal impedance 3 vcc power input, +3.3 v nominal 4 n/c mechanical conn ection only, make n o electrical connection 5 n/c mechanical conn ection only, make n o electrical connection 6 n/c mechanical conn ection only, make n o electrical connection 7 n/c mechanical conn ection only, make n o electrical connection 8 level current-driven rf output level control input. allows temperature compensation of rf output level. 9 vcc power input, +3.3 v nominal 10 gnd oscillator ground 11 n/c mechanical conn ection only, make n o electrical connection 12 gnd oscillator ground 13 gnd oscillator ground 14 gnd oscillator ground 15 gnd oscillator ground 16 vcc power input, +3.3 v nominal 17 vcc power input, +3.3 v nominal 18 gnd oscillator ground 19 gnd oscillator ground 20 rfout rf ou tput pin, mat ch to 5 0 ohm load with a 1.8 nh series inductor
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