ABX0237OC

A BX0235/37/38/39 7 50kHz – 800MHz Low Phase Noise Multiplier XO U niversal Low Phase Noise IC’s F EATURES • • S electable 750kHz to 800MHz range. L ow phase noise output (@ 10kHz frequency offset, -140dBc/Hz for 19.44MHz, -127dBc/Hz for 106.25MHz, -125dBc/Hz for 155.52MHz, 110dBc/Hz for 622.08MHz). C MOS (ABX0237), PECL (ABX0235 and ABX0238) or LVDS (ABX0239) output. 1 2 to 25MHz crystal input. N o external load capacitor required. O utput Enable selector. S electable 1/16 to 32x frequency multiplier. 3 .3V operation. A vailable in 16-Pin (TSSOP or 3x3mm QFN). P IN CONFIGURATION ( Top View) VDD XIN XOUT SEL3^ SEL2^ OE GND GND 1 2 16 15 SEL0^ SEL1^ GND CLKC VDD CLKT GND GND ABX023x • • • • • • • 3 4 5 6 7 8 14 13 12 11 10 9 D ESCRIPTION T he ABX0235 (PECL with inverted OE), ABX0237 (CMOS), ABX0238 (PECL), and ABX0239 (LVDS) are high performance and low phase noise XO IC chips. They provide phase noise performance as low as –125dBc at 1kHz offset (at 155MHz) and a typical RMS jitter of 4pS RMS ( at 155MHz ). They accept fundamental parallel resonant mode crystals from 12 to 25MHz. XIN SEL0^ / VDD* 10 VDD / GND* XOUT SEL3^ SEL2^ OE 13 14 15 16 12 11 SEL1^ 9 8 7 6 5 GND CLKC VDD CLKT ABX023x 1 2 3 4 GND GND GND B LOCK DIAGRAM SEL OE PLL (Phase Locked Loop) ^: *: Internal pull-up On 3x3 package, ABX0235/38 do not have SEL0 available: Pin 10 is VDD, pin 11 is GND. However, ABX0237/39 have SEL0 (pin 10), and pin 11 is VDD. See pin assignment table for details. O UTPUT ENABLE LOGICAL LEVELS P art # A BX0238 A BX0235 ABX0237 ABX0239 OE 0 ( Default) 1 0 1 (Default) S tate Output enabled Tri-state T ri-state Output enabled Q Q XIN XOUT Oscillator Amplifier PLL by-pass O E input: Logical states defined by PECL levels for ABX0238 Logical states defined by CMOS levels for ABX0235/37/39 3 0332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 w ww.Abracon.com 0 3/21/05 Page 1 GND A BX0235/37/38/39 7 50kHz – 800MHz Low Phase Noise Multiplier XO U niversal Low Phase Noise IC’s F REQUENCY SELECTION TABLE S EL3 S EL2 SEL1 SEL0 Selected Multiplier 0 0 0 1 1 1 1 1 1 1 0 1 1 0 0 0 1 1 1 1 1 1 1 0 1 1 0 0 1 1 1 0 1 1 0 1 0 1 0 1 F in x 32 F in / 8 F in x 2 F in / 2 F in / 16 F in x 4 F in / 4 F in x 8 F in x 16 N o multiplication N ote: S EL0 is not available (always “1”) for ABX0235 and ABX0238 in 3x3mm package P IN DESCRIPTIONS ABX0235 and ABX0238 (see next page of ABX0237/39) N ame X IN X OUT OE G ND C LKT C LKC S EL0 S EL1 S EL2 S EL3 V DD TSSOP Pin number 2 3 6 7,8,9,10,14 11 13 16 15 5 4 1, 12 3x3mm QFN Pin number 12 13 16 1,2,3,4,8,11 5 7 Not available 9 15 14 6,10 Type I I I P O O I I I I P Description Crystal input. See Crystal Specifications on page 3. Crystal output. See Crystal Specifications on page 3. Output enable pin (see OE logic state table on page 1). Ground. True output PECL Complementary output PECL. Multiplier selector pins. These pins have an internal pull-up that will default SEL to ‘1’ when not connected to GND. Power Supply. 3 0332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 w ww.Abracon.com 0 3/21/05 Page 2 A BX0235/37/38/39 7 50kHz – 800MHz Low Phase Noise Multiplier XO U niversal Low Phase Noise IC’s P IN DESCRIPTIONS ABX0237/39 (see previous page of ABX0235/38) N ame X IN X OUT OE G ND C LKT C LKC S EL0 S EL1 S EL2 S EL3 V DD TSSOP Pin number 2 3 6 7,8,9,10,14 11 13 16 15 5 4 1, 12 3x3mm QFN Pin number 12 13 16 1,2,3,4,8 5 7 10 9 15 14 6,11 Type I I I P O O I I I I P Description Crystal input. See Crystal Specifications on page 3. Crystal output. See Crystal Specifications on page 3. Output enable pin (see OE logic state table on page 1). Ground. True output LVDS (ABX0239) (N/C for ABX0237) Complementary output LVDS (ABX0239) (CMOS out for ABX0237). Multiplier selector pins. These pins have an internal pull-up that will default SEL to ‘1’ when not connected to GND. Power Supply. E LECTRICAL SPECIFICATIONS 1 . Absolute Maximum Ratings P ARAMETERS S upply Voltage I nput Voltage, dc O utput Voltage, dc S torage Temperature A mbient Operating Temperature* J unction Temperature L ead Temperature (soldering, 10s) E SD Protection, Human Body Model SYMBOL V DD VI VO TS TA TJ MIN. - 0.5 - 0.5 - 65 - 40 MAX. 4 .6 V DD +0.5 V DD +0.5 150 85 1 25 260 2 UNITS V V V °C °C °C °C kV E xposure of the device under conditions beyond the limits specified by Maximum Ratings for extended periods may cause permanent damage to the device and affect product reliability. These conditions represent a stress rating only, and functional operations of the device at these or any other conditions above the operational limits noted in this specification is not implied. * N ote : Operating Temperature is guaranteed by design for all parts (COMMERCIAL and INDUSTRIAL), but tested for COMMERCIAL grade only. 2 . Crystal Specifications P ARAMETERS C rystal Resonator Frequency C rystal Loading Rating R ecommended ESR SYMBOL F XIN C L (xtal) RE CONDITIONS P arallel Fundamental Mode A T cut MIN. 12 TYP. 20 MAX. 25 30 UNITS MHz pF Ω 3 0332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 w ww.Abracon.com 0 3/21/05 Page 3 A BX0235/37/38/39 7 50kHz – 800MHz Low Phase Noise Multiplier XO U niversal Low Phase Noise IC’s 3 . General Electrical Specifications P ARAMETERS S upply Current, Dynamic (with Loaded Outputs) O perating Voltage O utput Clock Duty Cycle S hort Circuit Current SYMBOL I DD V DD CONDITIONS P ECL/LVDS/CMOS F out