DATASHEET ICS91730 LOW EMI, SPREAD MODULATING, CLOCK GENERATOR Features/Benefits * ICS91730 is a Spread Spectrum Clock targeted for Mobile PC and LCD panel applications that generates an EMI-optimized clock signal (EMI peak reduction of 7-14 dB on 3rd-19th harmonics) through use of Spread Spectrum techniques. Pin Configuration CLKIN 1 8 PD #* VDD 2 7 SC LK GND 3 6 SD ATA CLKOUT 4 5 REF_OU T/FS_IN1* * ICS91730 focuses on the lower input frequency range of 14.318 to 80.00 MHz with a spread modulation of 20kHz to 40kHz. Specifications * * * * * * * Supply Voltages: VDD = 3.3V 0.3V Frequency range: 14.318 MHz <Fin > 80 MHz 8 Pin SOIC * Internal Pull-Up Resistor Functionality MHz 14.318 MHz in --> 27MHz out 27.00MHz in --> 27.00MHz out FSIN_1 0 1 Spread % default -0.8 down spread -1.25 down spread Cyc to Cyc jitter: <150ps Output duty cycle 45-55% 0C to +85C operation 8-pin SOIC Reference input Block Diagram IDT(R) LOW EMI, SPREAD MODULATING, CLOCK GENERATOR 1 ICS91730 REV F 061611 ICS91730 LOW EMI, SPREAD MODULATING, CLOCK GENERATOR Pin Descriptions PIN # PIN NA ME 1 2 3 4 CLKIN VDD GND CLKOUT PIN TYPE PWR IN OUT I/O DESCRIPTION Input for reference clock. Power supply, nominal 3.3V Ground pin. Modulated clock output. Un-modulated 3.3V reference clock output. 5 REF_OUT/FS_IN1* I/O Frequency select latch input. Refer to the functionality table. 6 SDATA PWR Data pin for SMBus circuitry, 5V tolerant. 7 SCLK PWR Clock pin of SMBus circuitry, 5V tolerant. Asynchronous active low input pin, with 120Kohm internal pull-up resistor, 8 PD#* PWR used to pow er down the device. The internal clocks are disabled and the VCO and the crystal are stopped. * Internal Pull-Up R esistor ** Internal Pull-Down R esistor IDT(R) LOW EMI, SPREAD MODULATING, CLOCK GENERATOR 2 ICS91730 REV F 061611 ICS91730 LOW EMI, SPREAD MODULATING, CLOCK GENERATOR Table 1: Frequency Configuration (see I2C Byte0) 14in/27out 14in/14out 27in/27out 48in/48out 66in/66out Sprd Type Sprd % FS4 FS3 FS2 FS1 FS0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 1 0 0 1 0 1 0 0 0 0 0 1 1 0 1 1 0 0 0 0 0 0 1 1 1 1 0 0 0 1 0 0 1 1 0 1 0 DOWN SPREAD (-) 0 1 0 1 1 CTR SPD 0 1 1 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 1 1 1 0 1 1 0 0 1 1 0 0 1 1 1 0 1 0 1 0 1 0 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 DOWN SPREAD (-) CENTER SPD (+/-) DOWN SPREAD (-) CENTER SPD (+/-) 0.60 0.80 1.00 1.25 1.50 2.00 0.50 1.00 0.60 1.00 -0.80 +/-0.3 1.50 1.75 2.00 2.50 3.00 1.25 0.40 0.50 0.70 1.00 1.20 1.50 DOWN SPREAD (-) 0.60 0.80 1.00 1.25 1.50 2.00 CENTER SPD (+/-) 0.50 1.00 Above is the hard coded 5 bit (32 entry) ROM table. FS3:0 are ONLY accessible through I2C software programming bits (byte0 bits5:7). FS4 can also be decoded from FS_IN1 latched input hardware pins. FS_IN1 FS4. Upon power-up the default is to use hardware selection of FS_IN1 latched value. FS3 = 0, FS2 = 0, FS1 = 0, FS0 = 1 upon power-up (refer to the functionality table on page 1). To access non-default spread entries in the ROM, byte0 programming should be used. In order to change the power up default of FS_IN1 = 1 (-1.25% down spread) to any other spread % entry, first change byte0bit 0 to software selection by switching this bit to a `1' and then program the desired percentage by changing byte0 bits 7:3. IDT(R) LOW EMI, SPREAD MODULATING, CLOCK GENERATOR 3 ICS91730 REV F 061611 ICS91730 LOW EMI, SPREAD MODULATING, CLOCK GENERATOR General SMBus Serial Interface Information How to Write How to Read * * * * * * * * * * * * * * * * * * * * * Controller (host) sends a start bit Controller (host) sends the write address IDT clock will acknowledge Controller (host) sends the beginning byte location = N IDT clock will acknowledge Controller (host) sends the byte count = X IDT clock will acknowledge Controller (host) starts sending Byte N through Byte N+X-1 IDT clock will acknowledge each byte one at a time Controller (host) sends a Stop bit Index Block Write Operation Controller (Host) T Index Block Read Operation IDT (Slave/Receiver) Controller (Host) starT bit T Slave Address WR * * * Controller (host) will send a start bit Controller (host) sends the write address IDT clock will acknowledge Controller (host) sends the beginning byte location = N IDT clock will acknowledge Controller (host) will send a separate start bit Controller (host) sends the read address IDT clock will acknowledge IDT clock will send the data byte count = X IDT clock sends Byte N+X-1 IDT clock sends Byte 0 through Byte X (if X(H) was written to Byte 8) Controller (host) will need to acknowledge each byte Controller (host) will send a not acknowledge bit Controller (host) will send a stop bit IDT (Slave/Receiver) starT bit Slave Address WRite ACK WR WRite ACK Beginning Byte = N ACK Beginning Byte = N ACK Data Byte Count = X ACK RT Slave Address Beginning Byte N ACK O O RD ReaD ACK X Byte O Repeat starT O Data Byte Count=X O O ACK ACK ACK Beginning Byte N Byte N + X - 1 stoP bit X Byte P O O O O O O Read Address Write Address D5(H) D4(H) IDT(R) LOW EMI, SPREAD MODULATING, CLOCK GENERATOR Byte N + X - 1 N Not acknowledge P stoP bit 4 ICS91730 REV F 061611 ICS91730 LOW EMI, SPREAD MODULATING, CLOCK GENERATOR Byte 0 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Pin # - Bit 0 Byte 1 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Byte 2 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Byte 3 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Pin # - Pin # x x x x x x x x Affected Pin Name Control Function FS0 Spread/FS0 FS1 Spread/FS1 FS2 Spread/FS2 FS3 Spread/FS3 FS4 FS4 PD# Tri_Sate PD# Tri_Sate Spread Enable Spread Enable Spread Spectrum Control FS 3:4 Hard/Software Select HW/SW Control Type RW RW RW RW RW RW RW RW Affected Pin Name Control Function REF_OUT REF_OUT_Enable REF_OUT Slew Rate REF-OUT FS-IN_1 FS-IN_1 Readback (Reserved) (Reserved) CLK_OUT Slew Rate CLK-OUT CLK_OUT CLK_OUT_Enable (Reserved) (Reserved) (Reserved) (Reserved) Affected Pin Name Control Function (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) Name (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) Hi-Z OFF LOW ON PWD 1 0 0 0 0 1 1 HW SW 0 Srpead Pecentage See Table1 These are I2C bits only Type RW RW R R RW RW R R Bit Control 0 1 Disable Enable Nominal Fast Nominal Fast Disable Enable - PWD 1 1 X 0 1 1 1 1 Type RW RW RW RW RW RW RW Bit Control 0 1 Disable Enable Disable Enable Disable Enable Disable Enable Disable Enable Disable Enable Disable Enable PWD 1 1 1 1 1 1 1 1 Bit Control Affected Pin Pin # X X X X x X X X Bit Control 0 1 Type RW RW RW RW RW RW RW RW Control Function (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) IDT(R) LOW EMI, SPREAD MODULATING, CLOCK GENERATOR 5 0 - 1 - ICS91730 PWD 1 1 1 1 1 1 1 1 REV F 061611 ICS91730 LOW EMI, SPREAD MODULATING, CLOCK GENERATOR Byte 4 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Byte 5 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Byte 6 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Pin # X X X X X X X X Affected Pin Name Control Function (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) Type RW RW RW RW RW RW RW RW Bit Control 0 1 - PWD 1 1 1 1 1 1 1 1 Pin # X X X X X X X X Affected Pin Name Control Function (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) (Reserved) Type RW RW RW RW Bit Control 0 1 - PWD 1 1 1 1 1 1 1 1 Pin # X X X X X X X X Affected Pin Name Control Function Revision ID Bit 3 (Reserved) Revision ID Bit 2 (Reserved) (Reserved) Revision ID Bit 1 (Reserved) Revision ID Bit 0 (Reserved) Vendor ID Bit 3 (Reserved) Vendor ID Bit 2 (Reserved) Vendor ID Bit 1 (Reserved) Vendor ID Bit 0 Type R R R R R R R R Bit Control 0 1 - PWD 1 1 1 1 1 1 1 1 IDT(R) LOW EMI, SPREAD MODULATING, CLOCK GENERATOR 6 ICS91730 REV F 061611 ICS91730 LOW EMI, SPREAD MODULATING, CLOCK GENERATOR Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the ICS91730. These ratings, which are standard values for IDT commercially rated parts, are stress ratings only. Functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods can affect product reliability. Electrical parameters are guaranteed only over the recommended operating temperature range. Electrical Characteristics-Input/Supply/Common Output Parameters T A = 0 - 85C; Supply Voltage V DD = 3.3 V +/-5% PARAMETER SYMBOL CONDITIONS Input High Voltage V IH Input Low Voltage VIL Input High Current I IH VIN = V DD Input Low Current IIL1 VIN = 0 V; Inputs with no pull-up resistors Powerdown Current ID D3. 3PD Operating Current ID D3.3OP Input Frequency Pin Inductance Fi Lpin CIN COUT C INX T tra ns 1 Input Capacitance 1 Transition time 1 Settling time 1 Clk Stabilization 1 Delay 1 Ts T ST AB tPZH ,tPZ L fin = 14.318MHz 2 fin = 66.67MHz VDD = 3.3 V 2 MIN 2 V SS - 0.3 -5 -5 TYP MAX VD D + 0.3 0.8 5 1 5 27 32 41 50 7 5 6 45 3 mA mA MHz nH pF pF pF ms 3 3 ms ms 10 ns 14.318 Logic Inputs Output pin capacitance X1 & X2 pins To 1st crossing of target frequency 27 36 From 1st crossing to 1% target frequency From VD D = 3.3 V to 1% target frequency Output enable delay (all outputs) 1 UNITS V V mA mA mA Guaranteed by design, not 100% tested in production. 2 Operating current depends on both the input and output frequencies. The values shown represent the upper and lower extremes. The higher the input/output frequency, the higher the current draw. The relationship is linear. IDT(R) LOW EMI, SPREAD MODULATING, CLOCK GENERATOR 7 ICS91730 REV F 061611 ICS91730 LOW EMI, SPREAD MODULATING, CLOCK GENERATOR Electrical Characteristics-CLKOUT T A = 0 - 85C; VD D = 3.3V +/-5%; CL = 15 pF (unless otherwise specified) PARAMETER SYMBOL CONDITIONS Output High Voltage V OH 3 IOH = -1 mA Output Low Voltage VOL3 IOL = 1 mA Rise Time tr3 VOL = 0.41V, V OH = 0.86V Fall Time tf3 VOH = 0.86V V OL = 0.41V measurement from differential wavefrom d t3 Duty Cycle 0.35V to +035V 1 VT = 50% tjcyc-cyc Jitter, Cycle to cycle 1 MIN 2.4 TYP MAX UNITS V 0.5 0.5 0.6 0.6 0.4 1 1 ns ns 45 50 55 % 50 150 ps TYP 14.318 48 MAX UNITS MHz 60 Guaranteed by design, not 100% tested in production. Electrical Characteristics-REF T A = 0 - 85C; VD D = 3.3V +/-5%; CL = 15 pF (unless otherwise specified) PARAMETER SYMBOL CONDITIONS Output Frequency F O1 1 VO = VDD *(0.5) Output Impedance RDSP1 1 1 Output High Voltage Output Low Voltage Output High Current Output Low Current Rise Time Fall Time V OH 1 VOL Duty Cycle Jitter dt 1 VOL = 0.4 V, V OH = 2.4 V VOH = 2.4 V, V OL = 0.4 V 1 1 1.2 1.2 2 2 V V mA mA ns ns VT = 1.5 V VT = 1.5 V 45 51 105 55 300 % ps 20 IOH = -1 mA IOL = 1 mA V OH@ MIN = 1.0 V, V OH @MAX = 3.135 V VOL @ MIN = 1.95 V, VOL @ MAX = 0.4 V 1 IOH 1 IOL 1 tr1 1 tf1 1 tjcyc-cyc MIN 1 2.4 0.4 -23 27 -29 29 Guaranteed by design, not 100% tested in production. IDT(R) LOW EMI, SPREAD MODULATING, CLOCK GENERATOR 8 ICS91730 REV F 061611 ICS91730 LOW EMI, SPREAD MODULATING, CLOCK GENERATOR Package Outline and Package Dimensions (8-pin SOIC, 150 Mil. Body) Package dimensions are kept current with JEDEC Publication No. 95 Millimeters 8 Symbol E Min A A1 B C D E e H h L H INDEX AREA 1 2 D Inches Max Min 1.35 1.75 0.10 0.25 0.33 0.51 0.19 0.25 4.80 5.00 3.80 4.00 1.27 BASIC 5.80 6.20 0.25 0.50 0.40 1.27 0 8 A Max .0532 .0688 .0040 .0098 .013 .020 .0075 .0098 .1890 .1968 .1497 .1574 0.050 BASIC .2284 .2440 .010 .020 .016 .050 0 8 h x 45 A1 C -Ce B SEATING PLANE L .10 (.004) C Ordering Information Part / Order Number 91730AMLF 91730AMLFT Shipping Packaging Tubes Tape and Reel Package 8-pin SOIC 8-pin SOIC Temperature 0 to +85C 0 to +85C "LF" suffix to the part number are the Pb-Free configuration and are RoHS compliant. "A" is the device revision designator (will not correlate with the datasheet revision). While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology (IDT) assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are not recommended without additional processing by IDT. IDT reserves the right to change any circuitry or specifications without notice. IDT does not authorize or warrant any IDT product for use in life support devices or critical medical instruments. IDT(R) LOW EMI, SPREAD MODULATING, CLOCK GENERATOR 9 ICS91730 REV F 061611 ICS91730 LOW EMI, SPREAD MODULATING, CLOCK GENERATOR Revision History Rev. B C Issue Date 06/25/04 06/29/04 D E 05/23/05 06/04/08 F 06/16/11 Who RDW Description Add Lead Free package description to Ordering Information Add Revision History table to datasheet. 1. Revise ABS max ratings. 2. Updated REF Electrical Characteristics table. 3. Updated LF ordering information from "lead free" to "RoHS compliant". Updated MLF ordering info 1. Added operating current specs that were inadvertantly ommitted 2. Updated ordering info to latest format 3. Changed C L from "10-20 pF" to 15 pF IDT(R) LOW EMI, SPREAD MODULATING, CLOCK GENERATOR 10 ICS91730 Page # 10 11 8-10 9 1, 7-9 REV F 061611 ICS91730 LOW EMI, SPREAD MODULATING, CLOCK GENERATOR SYNTHESIZERS Innovate with IDT and accelerate your future networks. Contact: www.IDT.com For Sales For Tech Support 800-345-7015 408-284-8200 Fax: 408-284-2775 www.idt.com/go/clockhelp pcclockhelp@idt.com Corporate Headquarters Integrated Device Technology, Inc. www.idt.com (c) 2011 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT, ICS, and the IDT logo are trademarks of Integrated Device Technology, Inc. Accelerated Thinking is a service mark of Integrated Device Technology, Inc. All other brands, product names and marks are or may be trademarks or registered trademarks used to identify products or services of their respective owners. Printed in USA