ABE0111 Low EMI Spread Spectrum Multiplier Clock FEATURES • Spread Spectrum Clock Generator with selectable multiplier ( 1x, 2x and 4x ). Output frequency ranges: 24MHz to 240MHz. Selectable center spread modulation rate. TTL/CMOS compatible outputs. 3.3V Operating Voltage. Low short term jitter. Available in 8-Pin 150mil SOIC. FIN 1 S2^ 2 S1^ 3 S0v 4 7 VD D S3v 6 FOUT 5 GND 8 ABE0111 • • • • • • PIN CONFIGURATION FIN = 24 ~ 120 Mhz Note: v: 30kΩ Internal Pull down. ^: 30kΩ Internal Pull up. DESCRIPTION The ABE0111 is a Spread Spectrum Clock Generator designed for the purpose of reducing EMI in highspeed digital systems, with the selectable Center Spread modulation amplitude (see table below). The output frequency is selected by programming 4 multiplier modes. The device operates over a very wide range of input frequencies and provides 1x to 4x modulated clock outputs. OUTPUT CLOCK (FOUT) SELECTION FIN Range (MHz) Spread Spectrum Modulation S3 S2 S1 S0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 1 24 24 24 24 - 60 60 60 60 X1 X1 X1 X1 ±0.75% ±1.00% ±1.25% ±1.50% 0 0 0 0 1 1 1 1 0 0 1 1 0 1 0 1 24 24 24 24 - 60 60 60 60 X2 X2 X2 X2 ±0.25% ±0.50% ±0.75% ±1.00% 1 1 0 0 0 0 0 1 24 - 60 24 - 60 X2 X2 1 1 0 0 1 1 0 1 24 - 60 24 - 60 X4 X4 ±0.25% ±0.50% 1 1 1 1 1 1 1 1 0 0 1 1 0 1 0 1 60 60 60 60 X1 X1 X1 X1 ±0.25% ±0.50% ±0.75% ±1.00% - 120 120 120 120 FOUT Frequency Fin / 1024 Magnitude ±1.25% ±1.50% 30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 www.Abracon.com 03/21/05 Page 1 ABE0111 Low EMI Spread Spectrum Multiplier Clock BLOCK DIAGRAM PLL SST FIN FOUT Control S(0:3) Logic PIN DESCRIPTIONS Name Number Type FIN 1 I S2 2 I S1 3 I S0 4 I GND 5 P FOUT 6 O S3 7 I VDD 8 P Description Input Clock Frequency, 24MHz to 120MHz. Digital control input to select multiplication factor and SST modulation amplitude. Has internal pull-up. Digital control input to select multiplication factor and SST modulation amplitude. Has internal pull-up. Digital control input to select multiplication factor and SST modulation amplitude. Has internal pull-down. Ground. SST Modulated Clock Frequency Output. The frequency before modulation is synthesized by multiplying the input frequency by 1X, 2X, or 4X, depending on S(0:3). Digital control input to select multiplication factor and SST modulation amplitude. Has internal pull-down. 3.3V Power Supply. 30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 www.Abracon.com 03/21/05 Page 2 ABE0111 Low EMI Spread Spectrum Multiplier Clock ELECTRICAL SPECIFICATIONS 1. Absolute Maximum Ratings PARAMETERS SYMBOL Supply Voltage Input Voltage, dc Output Voltage, dc Storage Temperature Ambient Operating Temperature* Junction Temperature Lead Temperature (soldering, 10s) ESD Protection, Human Body Model MIN. V DD VI VO TS TA TJ -0.5 -0.5 -65 -40 MAX. UNITS 4.6 V DD +0.5 V DD +0.5 150 85 125 260 2 V V V °C °C °C °C kV Exposure 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. * Note: Operating Temperature is guaranteed by design for all parts (COMMERCIAL and INDUSTRIAL), but tested for COMMERCIAL grade only. 2. DC/AC Specifications PARAMETERS Supply Voltage Input High Voltage Input Low Voltage Input High Current Input Low Current Output High Voltage Output Low Voltage Input Frequency Maximum interruption of F IN Input Capacitance Pull-up Resistor Pull-down Resistor Short Circuit Current 3.3V Dynamic Supply Current SYMBOL V DD V IH V IL I IH I IL V OH V OL F IN C in1 R pu R pd I sc I CC CONDITIONS MIN. TYP. 2.97 0.7* V DD MAX. UNITS 3.63 V V V 0.3* V DD 100 100 I OH =5mA, V DD =3.3V I OL =6mA, V DD =3.3V 2.4 0.4 120 none 24 PIN 2, 3 PIN 4, 7 No Load µA µA 4 30 30 50 20 MHz µs pF kΩ kΩ mA mA 30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 www.Abracon.com 03/21/05 Page 3 ABE0111 Low EMI Spread Spectrum Multiplier Clock 3. TIMING CHARACTERISTICS PARAMETERS Rise Time Fall Time Output Duty Cycle Input to Output Delay Cycle to Cycle Jitter SYMBOL CONDITIONS Tr Tf DT Measured at 0.8V ~ 2.0V @ 3.3V Measured at 2.0V ~ 0.8V @ 3.3V T cyc-cyc Over output frequency range @ 3.3V MIN. TYP. MAX. UNITS 0.8 0.78 45 2 0.95 0.85 50 1.1 0.9 55 4 100 ns ns % ns ps FUNCTIONAL DESCRIPTION Selectable spread spectrum and modulation rates The ABE0111 provides selectable spread spectrum modulation, as well as selectable modulation rate. Selection is made by connecting specific pins to a logical “zero” or “one”, according to the output clock selection table and modulation rate selection table on page 1. Pins 2 (S2), 3 (S1), 4 (S0), and 7 (S3) are used as inputs to select the spread spectrum modulation and multiplication factor as shown on the output clock selection table (page 1). Default values for S(0:3) through internal pull-up and pull-down resistor Selection pins S0 and S3 have an internal pull-down resistor of 30kΩ, pins 2 and 3 (S1 and S2) have an internal pull-up resistor of 30kΩ. This internal pull-up (or pull-down) resistor will pull the input value to a logical “one” (or “zero” respectively) by default, i.e. when no resistive load is connected between the pin and GND (VDD respectively). In order to override the internal pull-up (pull-down), the pin has to be connected to GND (VDD respectively). 30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 www.Abracon.com 03/21/05 Page 4 ABE0111 Low EMI Spread Spectrum Multiplier Clock PACKAGE INFORMATION 8 PIN Narrow SOIC ( mm ) SOIC Symbol Min. Max. A 1.47 1.73 A1 0.10 0.25 B 0.33 0.51 C D 0.19 4.80 0.25 E 3.80 4.95 4.00 H 5.80 6.20 L 0.38 1.27 e 1.27 BSC E H D A A1 C L B e ORDERING INFORMATION For part ordering, please contact our Sales Department: 30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 PART NUMBER The order number for this device is a combination of the following: Device number, Package type and Operating temperature range ABE0111 S C PART NUMBER TEMPERATURE C=COMMERCIAL I=INDUSTRIAL PACKAGE TYPE S=SOIC Order Number Marking Package Option ABE0111SC-T ABE0111SC ABE0111SC ABE0111SC SOIC -Tape and Reel SOIC -Tube Abracon Corporation, reserves the right to make changes in its products or specifications, or both at any time without notice. The information furnished by Abracon is believed to be accurate and reliable. However, Abracon makes no guarantee or warranty concerning the accuracy of said information and shall not be responsible for any loss or damage of whatever nature resulting from the use of, or reliance upon this product. LIFE SUPPORT POLICY: Abracon’s products are not authorized for use as critical components in life support devices or systems without the express written approval of the President of Abracon Corporation. 30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 www.Abracon.com 03/21/05 Page 5