ABE0104SC-T

A BE0101/02/04/06 L ow EMI Spread Spectrum Multiplier Clock F EATURES • • • • • • • • • S pread Spectrum Clock Generator with selectable multiplier from 1x to 6x outputs. O utput frequency ranges: 10MHz to 180MHz. A ccepts input from crystal or reference clock. S electable Center, Down or Asymmetric Spread Modulation. S electable Modulation rate. T TL/CMOS compatible outputs. 3 .3V Operating Voltage. L ow short term jitter. A vailable in 8-Pin 150mil SOIC. P IN CONFIGURATION XIN/FIN XOUT/SD*^ SC0^ SC1^ 1 8 VDD SC2^ FOUT GND ABE010x 2 3 4 7 6 5 XIN/FIN = 10 ~ 30 MHz N ote: ^ : Internal pull-up resistor (120k Ω f or SD, 30 k Ω f or SC0-SC2). * : The value of SD is latched upon power-up. The internal pull-up resistor results in a default high value when no pull-down resistor is connected to this pin (recommended external pull-down resistor of 27 k Ω ). D ESCRIPTION T he ABE0101/02/04/06 are Spread Spectrum Clock Generators designed for the purpose of reducing EMI in high-speed digital systems. Any output frequency from 10 to 180MHz can be selected by programming 6 multiplier modes. The device is designed to operate from a crystal or reference clock input and provides 1x to 6x modulated clock outputs. OUTPUT CLOCK (FOUT) SELECTION SD 1 1 0 1 0 1 0 1 0 1 0 1 0 1 SC2 0 0 0 0 0 0 0 1 1 1 1 1 1 1 S C1 0 0 0 1 1 1 1 0 0 0 0 1 1 1 S C0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 F OUT (01) X1 X1 X1 X1 X1 X1 X1 X1 X1 X1 X1 X1 X1 X1 F OUT (02) X2 X2 X2 X2 X2 X2 X2 X2 X2 X2 X2 X2 X2 X2 F OUT (04) X4 X4 X4 X4 X4 X4 X4 X4 X4 X4 X4 X4 X4 X4 F OUT (06) X6 X6 X6 X6 X6 X6 X6 X6 X6 X6 X6 X6 X6 X6 SST Modulation M agnitude 0.50% 1.00% 1.50% 2.00% Fin / 512 2.50% 3.00% 3.50% OFF Freq. C C D C A C A C A C A C A Type ± 0.25% ± 0.5% -1.0% ± 0.75% +0.25% ~ -1.25% ± 1.0% +0.5% ~ -1.5% ± 1.25% +0.75% ~ -1.75% ± 1.5% +1.0% ~ -2.0% ± 1.75% +1.25% ~ -2.25% N otes: C : Center Spread. A: Asymmetric Spread. D: Down Spread. 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 A BE0101/02/04/06 L ow EMI Spread Spectrum Multiplier Clock B LOCK DIAGRAM XIN/FIN XOUT XTAL OSC PLL SST FOUT SC(0:2) Control Logic PIN DESCRIPTIONS N ame X IN/FIN X OUT/SD S C0 S C1 G ND F OUT S C2 V DD Number 1 2 3 4 5 6 7 8 Type I B I I P O I P Description Crystal input to be connected to fundamental parallel mode crystal.(C L =18pF) or clock input. At power-up, this pin is an input pin to select modulation type. After input sampling, this pin is crystal output. Has internal pull up resistor. Digital control input to select modulation magnitude. Has internal pull-up. Digital control input to select modulation magnitude. Has internal pull-up. Ground. Modulated Clock Frequency Output. The frequency before modulation is synthesized by multiplying the input frequency by 1X, 2X, 4X, 6X depending on the part number (ABE0101, 02, 04, 06). Digital control input to select modulation magnitude. Has internal pull-up. Power Supply. F UNCTIONAL DESCRIPTION S electable spread spectrum and modulation magnitudes T he ABE0101/02/04/06 provides selectable spread spectrum modulation type, as well as selectable modulation magnitude. Selection is made by connecting specific pins to a logical “zero” or “one” according to the output clock selection table on page 1. In order to reduce the number of pins on the chip, the ABE0101/02/04/06 uses pin 2 (XOUT/SD) as a bi-directional pin. The pin serves as modulation type selector input (SD) upon power-up (see output clock selection table on page 1), and as XOUT crystal connection as soon as the input has been latched. Pins 3 (SC0), 4 (SC1), and 7 (SC2) are used as inputs to select the spread spectrum modulation magnitude as shown on the output clock selection table (page 1). 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 BE0101/02/04/06 L ow EMI Spread Spectrum Multiplier Clock C onnecting a selection pin to a logical “one” A ll selection pins have an internal pull-up resistor (30k Ω f or pins 3, 4, 7, and 120k Ω f or pin 2). This internal pull-up resistor will pull the input value to a logical “one” (pull-up) by default, i.e. when no resistive load is connected between the pin and GND. No external pull-up resistor is therefore required for connecting a logical “one” upon power-up. C onnecting a selection pin to a logical “zero” F or an input only pin, i.e. pins 3 (SC0), 4 (SC1), and 7 (SC2), the pin simply needs to be grounded to pull the input down to a logical “zero”. Connecting the bi-directional pin (SD) to a logical “zero” will however require the use of a 27k Ω l oading resistor between the pin and GND. 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 . Timing Characteristics P ARAMETERS R ise Time F all Time O utput Duty Cycle C ycle to Cycle Jitter C ycle to Cycle Jitter SYMBOL Tr Tf DT T cyc-cyc T cyc-cyc CONDITIONS M easured at 0.8V ~ 2.0V @ 3.3V M easured at 2.0V ~ 0.8V @ 3.3V F OUT=48MHz @ 3.3V F OUT=72MHz @ 3.3V MIN. 0.8 0.78 45 TYP. 0.95 0.85 50 MAX. 1.1 0.9 55 100 100 UNITS ns ns % ps ps 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 BE0101/02/04/06 L ow EMI Spread Spectrum Multiplier Clock 3 . DC/AC Specifications P ARAMETERS S upply Voltage I nput High Voltage I nput Low Voltage I nput High Current I nput Low Current O utput High Voltage O utput Low Voltage I nput Frequency M aximum interruption of F IN L oad Capacitance P ull-up Resistor P ull-up Resistor S hort Circuit Current 3 .3V Dynamic Supply Current CL R up R up I sc I CC SYMBOL V DD V IH V IL I IH I IL V OH V OL F XIN F IN CONDITIONS MIN. 2 .97 0 .7*VDD TYP. MAX. 3.63 0 .3*VDD 1 00 1 00 UNITS V V V µA µA I OH =5mA, VDD=3.3V I OL =6mA, VDD=3.3V W hen using a crystal W hen using reference clock W hen using reference clock B etween Pin XIN and XOUT * P IN 2 P IN 3, 4, 7 N o Load 2.4 10 10 18 120 30 50 20 0.4 30 30 100 MHz MHz µs pF kΩ kΩ mA mA * Note: P in XIN and XOUT each has a 36pF capacitance. When used with a XTAL, the two capacitors combined load the crystal with 18pF. If driving XIN with a reference clock signal, the load capacitance will be 36pF (typical). 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 4 A BE0101/02/04/06 L ow EMI Spread Spectrum Multiplier Clock P ACKAGE INFORMATION 8 PIN Narrow SOIC ( mm ) SOI C Symbol A A1 B C D E H L e Min. 1.47 0.10 0.33 0.19 4.80 3.80 5.80 0.38 1.27 BSC Max . 1.73 0.25 0.51 0.25 4.95 4.00 6.20 1.27 A1 B C L e A D E H ORDERING INFORMATION F or part ordering, please contact our Sales Department: 3 0332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 P ART NUMBER T he order number for this device is a combination of Device number, Package type and Operating temperature range A BE010x x C P ART N UMBER T EMPERATURE C=COMMERCIAL I=INDUSTRIAL P ACKAGE TYPE S=SOIC A BE0101SC- T ABE0101SC ABE0102SC- T ABE0102SC ABE0104SC- T ABE0104SC ABE0106SC- T ABE0106SC O rder Number Marking ABE0101SC ABE0101SC ABE0102SC ABE0102SC ABE0104SC ABE0104SC ABE0106SC ABE0106SC Package Option SOIC -Tape SOIC -Tube SOIC -Tape SOIC -Tube SOIC -Tape SOIC -Tube SOIC -Tape SOIC -Tube and Reel and Reel and Reel and Reel A bracon 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. L IFE 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. 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 5