PL904118UMG

PL904xxx Revision 1.0 General Description Features The PL904xxx series is a small form-factor, high performance, programmable device and a member of Micrel’s JitterBlocker factory programmable jitter attenuators. The JitterBlocker product family cleans deterministic jitter by attenuating spurious components in the phase noise, thereby improving the phase jitter and the overall phase noise. The PL904xxx is capable of reducing multiple pico seconds of phase jitter in a clock to a level below 0.5psRMS in most cases, making that clock usable for many more applications. • • • • The PL904xxx operates on a single 2.5V or 3.3V supply and is housed in a small QFN package for a broad range of applications. • • • • • • Input clock frequencies up to 250MHz can be filtered and frequency translation allows for output clock frequencies up to 850MHz. The input clock can be single-ended or differential. Datasheets and support documentation are available on Micrel’s web site at: www.micrel.com. Block Diagram Input frequency up to 250MHz Output frequency up to 850MHz Programmable input type, differential or single-ended Up to two outputs with LVPECL, LVDS, HCSL, or LVCMOS logic types Output enable control for each output Jitter attenuation of 20db at 3MHz spur frequency Cleans up spurs to below 0.5psRMS phase jitter Operating temperature range from –40°C to 85°C Available in 32-pin QFN GREEN/RoHS-compliant package Related devices: − PL902: LVCMOS, Period Jitter cleaning − PL903: Single ended input, one differential output, Phase Noise cleaning Applications • • • • • • • 1/10/40/100 Gigabit Ethernet (GbE) SONET/SDH PCI Express CPRI/OBSAI wireless base stations Fibre Channel SAS/SATA DIMM Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com September 11, 2015 Revision 1.0 tcghelp@micrel.com or (408) 955-1690 Micrel, Inc. PL904xxx Ordering Information Part Number Marking Shipping Ambient Temp. Range Package Lead Finish PL904xxxUMG PL904 XXX Tray –40° to +85°C QFN-32L NiPdAu PL904xxxUMG TR PL904 XXX Tape and Reel –40° to +85°C QFN-32L NiPdAu Pin Configuration 32-Pin QFN (5mm × 5mm) September 11, 2015 2 Revision 1.0 tcghelp@micrel.com or (408) 955-1690 Micrel, Inc. PL904xxx Pin Description Pin Number Pin Name Pin Type Pin Level Pin Function 18, 19 22, 23 OUTB, /OUTB OUTA, /OUTA O Various Clock outputs. (1) Can be programmed to one of the following logic types: LVPECL, LVDS, HCSL, or LVCMOS. 26, 27 REFIN, /REFIN I Various Reference clock input. Can be programmed to either differential or single-ended use. 20 16 OE_A OE_B I CMOS Output Enable, Outputs disable to tri-state, 0 = Disabled, 1 = Enabled, on-chip 75kΩ pull-up 1, 2, 5, 8, 25 VDD PWR Core power supply. 28 VDDI PWR Input circuit power supply, +3.3V only. 24 VDDA PWR Analog circuit power supply. 21 17 VDDOA VDDOB PWR Output buffers power supply. EPAD VSS PWR Power supply ground and thermal relief. 11 GND I 3, 4, 6, 7, 9, 10, 12, 13, 14, 15, 29, 30, 31, 32 DNC (2) This pin is not power supply ground, but must be tied to VSS for proper operation. Internally connected. Do not connect anything to these pins. Note: 1. In case of LVCMOS, only the true output pin is enabled. The complementary output pin is disabled to a high impedance. 2. Exposed package pad is electrically active and must be connected to ground. September 11, 2015 3 Revision 1.0 tcghelp@micrel.com or (408) 955-1690 Micrel, Inc. PL904xxx Functional Description The PL904xxx series is a very flexible, advanced programmable jitter filter design for high performance, small form-factor applications. The PL904xxx accepts a reference clock input between 12MHz and 250MHz that can be either differential or single-ended. The PL904xxx is capable of producing up to 2 differential outputs up to 850MHz. The most common configuration will be with the same input and output frequency, but this flexible design also allows frequency translation from one frequency to another frequency, as long as both frequencies are within the specified ranges for input and output. Jitter Attenuation Typically, the jitter attenuation settings will be optimized for one particular input and output frequency. The PL904xxx excels at attenuating deterministic jitter that presents itself as spurs in the phase noise plot above 1MHz. Output Logic Programming Available output logic types are LVPECL, LVDS, HCSL, and LVCMOS. Each output can be programmed individually to one of the four logic types. All logic types are differential, except LVCMOS. For LVCMOS, only the true channel of the output pair is enabled and the complementary channel is disabled. With LVCMOS, there is also an output drive setting. There is one setting for all LVCMOS outputs, so all LVCMOS outputs will have the same drive strength. Figure 1. Differential Input Signal Unused outputs are disabled to high impedance. Input Selection The reference input for the device can be programmed to be either differential or single ended and requires only a small amplitude. See Figure 1 and Figure 2. Figure 2. Single-Ended Input Signal The single-ended signal can be LVCMOS and the differential signal can be any of the differential logic types. For the differential logic types, it is important to use the appropriate termination for the logic type. September 11, 2015 4 Revision 1.0 tcghelp@micrel.com or (408) 955-1690 Micrel, Inc. PL904xxx Absolute Maximum Ratings(3) Operating Ratings(4) Supply Voltage (VDD, VDDI, VDDA, VDDOA/B).................... +4.6V Input Voltage (VIN) ................................ −0.5V to VDD + 0.5V Lead Temperature (soldering, 20s) ............................ 260°C Case Temperature ..................................................... 115°C Storage Temperature (Ts)......................... –65°C to +150°C Supply Voltage (VDD, VDDA, VDDOA/B, VDDI)....................... +2.375V to +3.465V Ambient Temperature (TA) .......................... –40°C to +85°C (5) Junction Thermal Resistance (θJA), Still-Air ...................................................... 34°C/W DC Electrical Characteristics(6) VDD, VDDA, VDDOA/B, VDDI = 2.375V ~ 3.465V; TA = –40°C to +85°C. Symbol Parameter VDD VDDA VDDOA/B Power supply voltage VDDI Power supply voltage IDD Total supply current, VDD + VDDO Condition Min. Typ. Max. Units 2.375 3.465 V 3.135 3.465 V 2 × LVPECL, 156.25MHz Outputs open 220 mA 2 × HCSL (PCIe), 100MHz Outputs terminated with 50Ω to VSS 230 mA 2 × LVCMOS, 125MHz Outputs open 210 mA Max. Units 0.3 VDDI – 0.3 V 0.2 VDDI V PP REFIN DC Electrical Characteristics(6) VDDI = 3.135V ~ 3.465V; TA = –40°C to +85°C. Symbol Parameter VCMR Input common mode voltage VSWING Input voltage swing Condition Min. Peak to peak. Each side of the differential input. Typ. Notes: 3. Exceeding the absolute maximum ratings may damage the device. 4. The device is not guaranteed to function outside its operating ratings. 5. Package thermal resistance assumes the exposed pad is soldered (or equivalent) to the device’s most negative potential on the PCB. 6. The circuit is designed to meet the AC and DC specifications shown in the Electrical Characteristics tables after thermal equilibrium has been established. September 11, 2015 5 Revision 1.0 tcghelp@micrel.com or (408) 955-1690 Micrel, Inc. PL904xxx LVDS Output DC Electrical Characteristics(6) VDDOA/B = 2.375V ~ 3.465V, TA = –40°C to +85°C, RL = 100Ω across Q and /Q. Symbol Parameter VOD Differential output voltage VCM Condition Min. Typ. Max. Units 245 350 454 mV Common mode voltage 1.125 1.2 1.375 V VOH Output high voltage 1.248 1.375 1.602 V VOL Output low voltage 0.898 1.025 1.252 V HCSL Output DC Electrical Characteristics(6) VDDOA/B = 2.375V ~ 3.465V, TA = −40°C to +85°C, RL = 50Ω to VSS Symbol Parameter VOH Condition Min. Typ. Max. Units Output high voltage 660 700 850 mV VOL Output low voltage −150 0 27 mV VCROSS Crossing point voltage 350 mV LVPECL Output DC Electrical Characteristics(6) VDDOA/B = 2.375V ~ 3.465V, TA = −40°C to +85°C, RL = 50Ω to VDD − 2V Symbol Parameter VOH Condition Min. Typ. Max. Units Output high voltage VDDO – 1.35 VDDO – 1.01 VDDO – 0.80 V VOL Output low voltage VDDO – 2.00 VDDO – 1.78 VDDO – 1.60 V VSWING Output voltage swing 0.65 0.77 0.95 V Min. Typ. Max. Units LVCMOS Output DC Electrical Characteristics(6) VDDOA/B = 2.375V ~ 3.465V, TA = −40°C to +85°C, RL = 50Ω to VDD/2 Symbol Parameter VOH Output high voltage VOL Output low voltage Condition VDD – 0.8 V 0.5 V Max. Units OE (LVCMOS) Input DC Electrical Characteristics(6) VDD, VDDA, VDDOA/B = 2.375V ~ 3.465V; VDDI = 3.135V ~ 3.465V, TA = −40°C to +85°C Symbol Parameter VIH Input high voltage VDD − 0.7 VDD + 0.3 V VIL Input low voltage VSS − 0.3 0.3 × VDD V IIH Input high current VDD = VIN = 3.465V 5 µA IIL Input low current VDD = 3.465V, VIN = 0V September 11, 2015 Condition Min. 6 −150 Typ. µA Revision 1.0 tcghelp@micrel.com or (408) 955-1690 Micrel, Inc. PL904xxx AC Electrical Characteristics VDD, VDDA, VDDOA/B, VDDI = 2.375V ~ 3.465V; TA = –40°C to +85°C. Symbol Parameter FIN Input frequency FOUT Output frequency TR/TF ODC TLOCK Condition Min. Max. Units 12 250 MHz LVPECL, LVDS, HCSL 12 850 MHz LVCMOS 12 250 MHz LVPECL output 85 135 350 ps Output rise/fall time LVDS output 85 140 300 ps See Figure 4 HCSL output 175 340 700 ps LVCMOS output (default drive) 100 200 400 ps Output duty cycle All output frequencies 45 50 55 % See Figure 3