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ABV0235 Datasheet(PDF) 1 Page - Abracon Corporation |
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ABV0235 Datasheet(HTML) 1 Page - Abracon Corporation |
1 / 9 page ABV0235/-37/-38/-39 750kHz – 800MHz Low Phase Noise Multiplier VCXO Universal Low Phase Noise IC’s 30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 www.Abracon.com 03/21/05 Page 1 FEATURES • Selectable 750kHz to 800MHz range. • Low phase noise output (@ 10kHz frequency offset, -142dBc/Hz for 19.44MHz, -125dBc/Hz for 155.52MHz, -115dBc/Hz for 622.08MHz). • CMOS (ABV0237), PECL (ABV0235 and ABV0238) or LVDS (ABV0239) output. • 12 to 25MHz crystal input. • No external load capacitor or varicap required. • Output Enable selector. • Wide pull range (+/-200 ppm) • Selectable 1/16 to 32x frequency multiplier. • 3.3V operation. • Available in 16-Pin (TSSOP or 3x3mm QFN). DESCRIPTION The ABV0235 (PECL with inverted OE), ABV0237 (CMOS), ABV0238 (PECL), and ABV0239 (LVDS) are high performance and low phase noise VCXO IC chips. They provide phase noise performance as low as –125dBc at 10kHz offset (at 155MHz), by multi- plying the input crystal frequency up to 32x. The wide pull range (+/- 200 ppm) and very low jitter make them ideal for a wide range of applications, including SONET/SDH and FEC. They accept fun- damental parallel resonant mode crystals from 12 to 25MHz. BLOCK DIAGRAM PIN CONFIGURATION (Top View) ^: Internal pull-up *: On 3x3 package, ABV0235/-38 do not have SEL0 available: Pin 10 is VDD, pin 11 is GND. However, ABV0237/-39 have SEL0 (pin 10), and pin11 is VDD. See pin assignment table for details. OUTPUT ENABLE LOGICAL LEVELS Part # OE State 0 (Default) Output enabled ABV0238 1 Tri-state 0 Tri-state ABV0235 ABV0237 ABV0239 1 (Default) Output enabled OE input: Logical states defined by PECL levels for ABV0238 Logical states defined by CMOS levels for ABV0237/-39 1 2 3 4 5 6 7 8 VDD 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 XIN XOUT SEL3^ SEL2^ OE VCON GND SEL0^ SEL1^ GND CLKC VDD CLKT GND GND A023x GND VDD CLKT CLKC 12 3 4 12 11 10 9 13 14 15 16 8 7 6 5 SEL3^ XOUT SEL2^ OE X+ X- OE Q ABV023x Vi n Q PLL by-pass SEL PLL (Phase Locked Loop) Oscillator Amplifier w/ integrated varicaps |
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