PI6C490098 1:3 25MHz Clock Buffer Features Description ÎÎSupport XTAL or Clock input at 25MHz The PI6C490098 is a low jitter clock buffer supporting either XTAL or reference input. Two of its outputs can support wide operating voltage from 1.8V to 3.3V. It is a cost effective way to generate multiple outputs for all kinds of applications that need 25MHz with different power supplies. ÎÎThree buffered outputs support VDD operation ÎÎVery low phase jitter(RMS) : < 0.5ps ÎÎVery low additive jitter: <300fs (typ) ÎÎ3.3V supply voltage for Core ÎÎ1.8V ~ 3.3V supply voltage for two outputs ÎÎPackaging: 16-pin TSSOP ÎÎCommercial & Industrial Temperature support Applications ÎÎNetworking Systems ÎÎFemtocell BTS ÎÎPeripheral Block Diagram Pin Configuration (16-Pin TSSOP) VDD VDDO CLK3 CLK2 X1/CLKIN X2 Crystal Oscillator CLK1 GND OE# X1/ICLKIN 1 16 X2 VDD 2 15 GND GND 3 14 VDD VDD 4 13 CLK1 NC 5 12 CLK2 NC 6 11 VDDO GND 7 10 CLK3 OE# 8 9 GND 16-pin (173 mil) TSSOP 12-0166 1 www.pericom.com PI6C490098 RevA 2/06/2012 PI6C490098 1:3 25MHz Clock Buffer Pin number Pin Name Type Description 1 X1/CLKIN Input Crystal connection or clock input 2, 4, 14 VDD Power 3.3V Supply voltage for core and CLK1 5, 6, NC 7, 9, 15 GND Power Connect to Ground 8 OE# Input Global output enable when low. Internal pull-down resistor. 10 CLK3 Output Clock Output 3 11 VDDO Power Supply voltage from 1.8V to 3.3V for CLK2 and CLK3 12 CLK2 Output Clock Output 2 13 CLK1 Output Clock Output 1 16 X2 Output Crystal connection No connect Function Table OE# CLK1/CLK2/CLK3 0 Enabled 1 Hi-Z, weak pull down 12-0166 2 www.pericom.com PI6C490098 RevA 2/06/2012 PI6C490098 1:3 25MHz Clock Buffer Maximum Ratings (Above which useful life may be impaired. For user guidelines, not tested.) Note: Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. Storage Temperature........................................................... –65°C to +150°C Supply Voltage to Ground Potential, VDD .........................–0.5V to +4.6V Power Requirements(Over operating free-air temperature range) Symbol Parameter Min. Typ. Max. Units VDD Power Supply Voltage 3.135 3.3 3.465 V VDDO Power Supply Voltage for outputs 1.71 3.465 V IDD Power supply current, no load TA Ambient Operating Temperature tUP Power Supply Ramp Time 5 mA 0 +70 -40 +85 °C 4 ms DC Electrical Characteristics Symbol Parameter Condition Min. VIH Input High Voltage CLKIN, OE# VDD/2+1 VIL Input Low Voltage CLKIN, OE# VOH Output High Voltage IOH = -8mA VOL Output Low Voltage IOL = 8mA ZO Nominal Output Impedance R PD Internal Pull-down Resistor CIN Input Capacitance 12-0166 Typ. Max. V VDD/2-1 V V VDDO – 0.4 0.4 OE# 230 CLKIN 320 OE# 5 CLKIN 7 www.pericom.com V W 20 3 Units kW pF PI6C490098 RevA 2/06/2012 PI6C490098 1:3 25MHz Clock Buffer AC Electrical Characteristics Symbol Parameter FIN Input Frequency tR (Note 4) Conditions Min. Typ. Max. Units Fundamental Crystal 25 MHz Input Clock 25 MHz Output Rise Time 20% to 80% 25MHz, Note 1, 1 ns tF Output Fall Time 80% to 20% 25MHz, Note 1, 1 ns tDC Duty Cycle Note 2 50 Ferror Output Frequency Synthesis Error Jphase Clock Phase Jitter (RMS) 25MHz, Note 2 0.5 Jadd Additive Jitter 25MHz, Note 3, 300 53 0 % ppm 1.5 ps fs 1. Note 1: Measured with 7 pF lump load. 2. Note 2: 12 kHz to 20 MHz offset frequency using a crystal input. 3. Note 3: CLKIN input with X2 floating. 4. Note 4: Do not drive this device without a crystal or valid clock input Crystal Oscillator Circuit X1 C1 20pF Crystal�(CL�=�16pF) X2 C2 20pF 0.1µF VDD VDD OUTPUTS 0.1µF VDDO CLOAD (7pF lump load) VDD GND CLK out GND CMOS Test Configuration 12-0166 4 www.pericom.com PI6C490098 RevA 2/06/2012 PI6C490098 1:3 25MHz Clock Buffer Packaging Mechanical: 16-Pin TSSOP (L) DOCUMENT CONTROL NO. PD - 1310 REVISION: E 16 DATE: 03/09/05 .169 .177 1 1 .0256 BSC 0.65 .193 .201 4.9 5.1 4.3 4.5 .004 .008 .047 max. 1.20 .002 .006 .007 .012 0.09 0.20 0.45 .018 0.75 .030 SEATING PLANE .252 BSC 6.4 0.05 0.15 0.19 0.30 Pericom Semiconductor Corporation 3545 N. 1st Street, San Jose, CA 95134 1-800-435-2335 • www.pericom.com Note: 1. Package Outline Exclusive of Mold Flash and Metal Burr 2. Controlling dimentions in millimeters 3. Ref: JEDEC MO-153F/AB DESCRIPTION: 16-Pin, 173-Mil Wide, TSSOP PACKAGE CODE: L Ordering Information Ordering Code Package Code Package Type Operating Temperature PI6C490098LE L Pb-free & Green, 16-pin TSSOP Commercial PI6C490098LIE L Pb-free & Green, 16-pin TSSOP Industrial Notes: • Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ • E = Pb-free and Green • X suffix = Tape/Reel Pericom Semiconductor Corporation • 1-800-435-2336 12-0166 5 www.pericom.com PI6C490098 RevA 2/06/2012