PI6C490094 1:4 24MHz Clock Buffer Features Description ÎÎSupport XTAL or Clock input at 24MHz The PI6C490094 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 24MHz with different power supplies. ÎÎFour buffered outputs support VDDO operation ÎÎVery low phase jitter(RMS) : < 1.5ps (max) ÎÎVery low additive jitter: <300fs (typ) ÎÎ3.3V supply voltage for Core ÎÎ1.8V ~ 3.3V supply voltage for two output banks ÎÎPackaging: 16-pin TSSOP ÎÎCommercial & Industrial Temperature support Applications ÎÎNetworking Systems ÎÎFemtocell BTS ÎÎPeripheral Block Diagram Pin Configuration (16-Pin TSSOP) VDD VDDO1 CLK1 CLK2 X1/CLKIN X2 Crystal Oscillator CLK3 CLK4 GND 13-0129 OE# V DDO2 X1/ICLKIN 1 16 X2 VDD 2 15 GND GND 3 14 VDD VDD 4 13 CLK1 VDD02 5 12 CLK2 CLK4 6 11 VDDO1 GND 7 10 CLK3 OE# 8 9 GND 16-pin (173 mil) TSSOP 1 www.pericom.com PI6C490094 Rev A 08/09/13 PI6C490094 1:4 24MHz Clock Buffer Pin number Pin Name Type Description 1 X1/CLKIN Input Crystal connection or clock input 2, 4, 14 VDD Power Supply voltage 3.3V 5 VDDO2 Power Supply voltage from 1.8V to 3.3V for CLK3 and CLK4 6 CLK4 Output Clock Output 4 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 VDDO1 Power Supply voltage from 1.8V to 3.3V for CLK1 and CLK2 12 CLK2 Output Clock Output 2 13 CLK1 Output Clock Output 1 16 X2 Output Crystal connection Function Table OE# CLK1/CLK2/CLK3/CLK4 0 Enabled 1 Hi-Z, weak pull down 13-0129 2 www.pericom.com PI6C490094 Rev A 08/09/13 PI6C490094 1:4 24MHz 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 Ambient Temperature with Power Applied ...................... -40ºC to+85ºC Supply Voltage to Ground Potential, VDD .........................–0.5V to +4.6V ESD Protection (HBM) ........................................................................ 2000V 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 5 mA TA Ambient Operating Temperature tUP Power Supply Ramp Time 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 13-0129 Typ. Max. V VDD/2-1 V W 20 OE# 170 CLKIN 220 OE# 4 CLKIN 7.5 www.pericom.com V V VDDo – 0.4 0.4 3 Units PI6C490094 kW pF Rev A 08/09/13 PI6C490094 1:4 24MHz Clock Buffer AC Electrical Characteristics Symbol Parameter FIN Input Frequency tR (Note 4) Conditions Min. Typ. Max. Units Fundamental Crystal 24 MHz Input Clock 24 MHz Output Rise Time 20% to 80% 24MHz, Note 1 1 ns tF Output Fall Time 80% to 20% 24MHz, Note 1 1 ns tDC Duty Cycle Jphase Clock Phase Jitter (RMS) 24MHz, Note 2 Jadd Additive Jitter 24MHz, Note 3 47 53 % 1.5 ps 300 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 0.1µF VDD OUTPUTS 0.1µF CLOAD VDD GND CLK out GND CMOS Test Configuration 13-0129 4 www.pericom.com PI6C490094 Rev A 08/09/13 PI6C490094 1:4 24MHz Clock Buffer Crystal Oscillator Circuit X1 C1 24pF Crystal�(CL�=�16pF) X2 C2 24pF Typical Crystal Requirement Parameter Minimum Typical Maximum Mode of Oscillation Fundamental Frequency 24 Units MHz Equivalent Series Resistance (ESR) 50 Ω Shunt Capacitance 7 pF Drive Level 1 mW Recommended Crystal Specification Pericom recommends: a) FL2400068, SMD 3.2x2.5(4P), 24MHz, CL=18pF, -20~70C, +/-20ppm, http://www.pericom.com/pdf/datasheets/se/FL.pdf b) FL2400075, SMD 3.2x2.5(4P), 24MHz, CL=18pF, -40~85C, +/-20ppm, http://www.pericom.com/pdf/datasheets/se/FL.pdf b) FY2400041, SMD 5x3.2(4P), 24MHz, CL=18pF, -20~70C, +/-30ppm, http://www.pericom.com/pdf/datasheets/se/FY_F9.pdf For other crystal options, please contact Pericom sales. Thermal Information Symbol Description QJA Junction-to-ambient thermal resistance QJC Junction-to-case thermal resistance 13-0129 Condition Still air 84.0 OC/W 17.0 OC/W 5 www.pericom.com PI6C490094 Rev A 08/09/13 PI6C490094 1:4 24MHz Clock Buffer Packaging Mechanical: 16-Pin TSSOP (L) DATE: 05/03/12 Notes: 1. Refer JEDEC MO-153F/AB 2. Controlling dimensions in millimeters 3. Package outline exclusive of mold flash and metal burr DESCRIPTION: 16-Pin, 173mil Wide TSSOP PACKAGE CODE: L DOCUMENT CONTROL #: PD-1310 REVISION: F 12-0372 Ordering Information Ordering Code Package Code Package Type Operating Temperature PI6C490094LE L Pb-free & Green, 16-pin TSSOP Commercial PI6C490094LIE 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 13-0129 6 www.pericom.com PI6C490094 Rev A 08/09/13