CDCLVD110A www.ti.com SCAS841 – FEBRUARY 2007 PROGRAMMABLE LOW-VOLTAGE 1:10 LVDS CLOCK DRIVER FEATURES • • • • • • • • • Low-Output Skew <30 ps (Typical) for Clock-Distribution Applications Distributes One Differential Clock Input to 10 LVDS Differential Clock Outputs VCC range 2.5 V ±5% Typical Signaling Rate Capability of Up to 1.1 GHz Configurable Register (SI/CK) Individually Enables Disables Outputs, Selectable CLK0, CLK0 or CLK1, CLK1 Inputs Full Rail-to-Rail Common-Mode Input Range Receiver Input Threshold ±100 mV Available in 32-Pin TQFP Package Fail-Safe I/O-Pins for VDD = 0 V (Power Down) DESCRIPTION The CDCLVD110A clock driver distributes one pair of differential LVDS clock inputs (either CLK0 or CLK1) to 10 pairs of differential clock outputs (Q0–Q9) with minimum skew for clock distribution. The CDCLVD110A is specifically designed to drive 50-Ω transmission lines. When the control enable is high (EN = 1), the 10 differential outputs are programmable in that each output can be individually enabled/disabled (3-stated) according to the first 10 bits loaded into the shift register. Once the shift register is loaded, the last bit selects either CLK0 or CLK1 as the clock input. However, when EN = 0, the outputs are not programmable and all outputs are enabled. The CDCLVD110A has an improved startup circuit that minimizes enabling time in AC- and DC-coupled systems. The CDCLVD110A is characterized for operation from –40°C to 85°C. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2007, Texas Instruments Incorporated CDCLVD110A www.ti.com SCAS841 – FEBRUARY 2007 FUNCTIONAL BLOCK DIAGRAM 2 Submit Documentation Feedback CDCLVD110A www.ti.com SCAS841 – FEBRUARY 2007 TERMINAL FUNCTIONS TERMINAL NAME NO. I/O DESCRIPTION CK 1 I Control register input clock, features a 120-k. pullup resistor SI 2 I Control register serial input/CLK Select, features a 120-k. pulldown resistor CLK0 3 I True differential input, LVDS CLK0 4 I Complementary differential input, LVDS VBB 5 O Reference voltage output CLK1 6 I True differential input, LVDS CLK1 7 I Complementary differential input, LVDS EN 8 I Control enable (for programmability), features a 120-k. pulldown resistor, input VSS 9, 25 Device ground 16, 32 Supply voltage VDD Q [9:0] 11, 13, 15, 18, 20, 22, 24, 27, 29, 31 O Clock outputs, these outputs provide low-skew copies of CLKIN Q[9:0] 10, 12, 14, 17, 19, 21,23, 26, 28, 30 O Complementary clock outputs, these outputs provide low-skew copies of CLKIN ABSOLUTE MAXIMUM RATINGS (1) VALUE UNIT –0.3 to 2.8 V Input voltage –0.2 to (VDD + 0.2) V VO VI Output voltage –0.2 to (VDD + 0.2) V Qn, Qn, IOSD Driver short circuit current VDD Supply voltage VI Continuous Electrostatic discharge (HBM 1.5 kΩ, 100 pF), ESD (1) >2000 V Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. RECOMMENDED OPERATING CONDITIONS VDD Supply voltage VIC Receiver common-mode input voltage TA Operating free-air temperature Submit Documentation Feedback MIN NOM 2.375 2.5 MAX UNIT 2.625 V 0.5|VID| VDD– 0.5|VID| V –40 85 °C 3 CDCLVD110A www.ti.com SCAS841 – FEBRUARY 2007 ELECTRICAL CHARACTERISTICS over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT RL = 100Ω 250 450 600 mV 50 mV – 40°C to 85 C 0.95 1.2 1.45 V 350 mV DRIVER |VOD| Differential output voltage ∆VOD VOD magnitude change VOS Offset voltage ∆VOS VOS magnitude change IOS Output short circuit current VBB Reference output voltage VDD = 2.5 V, IBB = –100 µA CO Output capacitance VO = VDD or GND VO = 0 V –20 |VOD| = 0 V mA 20 1.15 1.25 1.35 V 3 pF RECEIVER VIDH Input threshold high VIDL Input threshold low |VID| Input differential voltage IIH IIL CI Input current, CLK0/CLK0, CLK1/CLK1 Input capacitance 100 VI = VDD mV 200 mV –5 VI = 0 V mV –100 VI = VDD or GND µA 5 3 pF SUPPLY CURRENT Full loaded IDD Supply current IDDZ All outputs enabled and loaded, RL = 100 Ω, f = 100 MHz 100 110 All outputs enabled and loaded, RL = 100 Ω, f = 800 MHz 150 160 No load Outputs enabled, no output load, f = 0 Hz 35 3-State All outputs 3-state by control logic, f = 0 Hz 35 mA LVDS — SWITCHING CHARACTERISTICS over recommended operating free-air temperature range, VDD = 2.5 V ±5% PARAMETER tPLH tPHL Propagation delay low-to-high Propagation delay high-to-low FROM (INPUT) TO (OUTPUT) CLK0, CLK0 CLK1, CLK1 TYP MAX Qn, Qn 2 3 ns CLK0, CLK0 CLK1, CLK1 Qn, Qn 2 3 ns CLK0, CLK0 CLK1, CLK1 Qn, Qn 45% UNIT tduty Duty cycle tsk(o) Output skew Any Qn, Qn tsk(p) Pulse skew Any Qn, Qn 50 ps Any Qn, Qn 600 ps tsk(pp) Part-to-part skew 55% 30 ps tr Output rise time, 20% to 80%, RL = 100 Ω, CL = 5 pF Any Qn, Qn 350 ps tf Output fall time, 20% to 80%, RL = 100 Ω, CL = 5 pF Any Qn, Qn 350 ps fclk 4 MIN Max input frequency CLK0, CLK0 CLK1, CLK1 Submit Documentation Feedback Any Qn, Qn 900 1100 MHz CDCLVD110A www.ti.com SCAS841 – FEBRUARY 2007 CONTROL REGISTER CHARACTERISTICS over recommended operating free-air temperature range, VDD = 2.5 V ±5% (unless otherwise noted) PARAMETER fMAX Maximum frequency of shift register tsu Setup time, clock to SI th tremoval TEST CONDITIONS MIN TYP 100 150 MAX UNIT MHz 2 ns Hold time, clock to SI 1.5 ns Removal time, enable to clock 1.5 ns tstartup Startup time after disable through SI 1.0 µs tw Clock pulse width, minimum VIH Logic input high VDD = 2.5 V VIL Logic input low VDD = 2.5 V IIH IIL Input current, CK pin Input current, SI and EN pins Input current, CK pin Input current, SI and EN pins 3 VI = VDD VI = GND Submit Documentation Feedback ns 2 V 0.8 –5 5 10 –30 –10 30 –5 5 V µA µA 5 CDCLVD110A www.ti.com SCAS841 – FEBRUARY 2007 SPECIFICATION OF CONTROL REGISTER The CDCLVD110A has an 11-bit, serial-in shift register and an 11-bit control register. The control Register enables/disables each output clock, and selects either CLK0 or CLK1 as the input clock. The CDCLVD110A has two modes of operation: Programmable Mode (EN=1) The shift register uses a serial input (SI) and a clock input (CK). Once the shift register is loaded with 11 clock pulses, the 12th clock pulse loads the control register. The first bit (bit 0) on SI enables the Q9-Q9 output pair, and the 10th bit (bit 9) enables the Q0-Q0 pair. The 11th bit (bit 10) on SI selects either CLK0 or CLK1 as the input clock; a bit value of 0 selects CLK0, whereas a bit value of 1 selects CLK1. To restart the control register configuration, a reset of the state machine must be done with a clock pulse on CK (shift register clock input) and EN set to low. The control register can be configured only once after each reset. Standard Mode (EN=0) In this mode, the CDCLVD110A is not programmable and all the clock outputs are enabled. The clock input (CLK0 or CLK1) is selected with the SI pin, as is shown in the table entitled control register. STATE-MACHINE INPUTS EN SI CK OUTPUT L L X All outputs enabled, CLK0 selected, control register disabled, default state L H X All outputs enabled, CLK1 selected, control register disabled H L ↑ First stage stores L, other stage stores data of previous stage H H First stage stores H, other stage stores data of previous stage L X Reset of state machine, shift and control registers CONTROL REGISTER BIT 10 BITS [0-9] QN[0-9] L H CLK0 H H CLK1 X L Outputs disabled SERIAL INPUT (SI) SEQUENCE BIT 10 BIT 9 BIT 8 BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 CLK_SEL Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 TRUTH TABLE FOR CONTROL LOGIC CK EN SI CLK0 CLK0 CLK1 CLK1 L L L L L L L H X L H L X L L Open Open L L H X X L L H X X L L H X X All outputs enabled 6 Q(0-9) Q(0-9) X L H X H L X X L H L H L H H L H L Open Open L H X = Don't care Submit Documentation Feedback CDCLVD110A www.ti.com SCAS841 – FEBRUARY 2007 APPLICATION INFORMATION Fall-Safe Information For VDD = 0 V (power-down mode) the CDCLVD110A has fail-safe input and output pins. In power-on mode, fail-safe biasing at input pins can be accomplished with a 10-kΩ pullup resistor from CLK0/CLK1 to VDD and a 10-kΩ pulldown resistor from CLK0/CLK1 to GND. LVDS Receiver Input Termination The LVDS receiver inputs require 100-Ω termination resistors placed as close as possible across the input pins. Control Inputs Termination No external termination is required. The CK control input has an internal 120-kΩ pullup resistor, while the SI– and EN–control inputs each have an internal 120-kΩ pulldown resistor. If the control pins are left open per the default, all outputs are enabled, CLK0, CLK0 is selected, and the control register is disabled. Submit Documentation Feedback 7 CDCLVD110A www.ti.com SCAS841 – FEBRUARY 2007 PARAMETER MEASUREMENT INFORMATION A. Output skew, tsk(o), is calculated as the greater of: – The difference between the fastest and the slowest tPLHn (n = 1, 2,...10) – The difference between the fastest and the slowest tPHLn (n = 1, 2,...10) B. Part-to-part skew, tsk(pp), is calculated as the greater of: – The difference between the fastest and the slowest tPLHn (n = 1, 2,...10) across multiple devices – The difference between the fastest and the slowest tPHLn (n = 1, 2,...10) across multiple devices C. Pulse skew, tsk(p), is calculated as the magnitude of the absolute time difference between the high-to-low (tPHL) and the low-to-high (tPLH) propagation delays when a single switching input causes one or more outputs to switch, tsk(p) = | tPHL– tPLH |. Pulse skew is sometimes referred to as pulse-width distortion or duty-cycle skew. Figure 1. Waveforms for Calculation of tsk(o) and tsk(pp) 8 Submit Documentation Feedback CDCLVD110A www.ti.com SCAS841 – FEBRUARY 2007 PARAMETER MEASUREMENT INFORMATION (continued) Figure 2. Test Criteria for fclk, Duty Cycle, tr, tf, VOD Submit Documentation Feedback 9 PACKAGE OPTION ADDENDUM www.ti.com 16-Mar-2007 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty CDCLVD110AVF ACTIVE LQFP VF 32 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM CDCLVD110AVFG4 ACTIVE LQFP VF 32 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM CDCLVD110AVFR ACTIVE LQFP VF 32 1000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM CDCLVD110AVFRG4 ACTIVE LQFP VF 32 1000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Lead/Ball Finish MSL Peak Temp (3) (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page 1 MECHANICAL DATA MTQF002B – JANUARY 1995 – REVISED MAY 2000 VF (S-PQFP-G32) PLASTIC QUAD FLATPACK 0,45 0,25 0,80 24 0,20 M 17 25 16 32 9 0,13 NOM 1 8 5,60 TYP 7,20 SQ 6,80 9,20 SQ 8,80 Gage Plane 0,05 MIN 0,25 0°– 7° 1,45 1,35 Seating Plane 0,75 0,45 0,10 1,60 MAX 4040172/D 04/00 NOTES: A. All linear dimensions are in millimeters. B. This drawing is subject to change without notice. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and applications using TI components. To minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from TI under the patents or other intellectual property of TI. Reproduction of information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for such altered documentation. Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements. TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonably be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing such use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may be provided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in such safety-critical applications. TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products are specifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet military specifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely at the Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use. TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are designated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated products in automotive applications, TI will not be responsible for any failure to meet such requirements. Following are URLs where you can obtain information on other Texas Instruments products and application solutions: Products Applications Amplifiers amplifier.ti.com Audio www.ti.com/audio Data Converters dataconverter.ti.com Automotive www.ti.com/automotive DSP dsp.ti.com Broadband www.ti.com/broadband Interface interface.ti.com Digital Control www.ti.com/digitalcontrol Logic logic.ti.com Military www.ti.com/military Power Mgmt power.ti.com Optical Networking www.ti.com/opticalnetwork Microcontrollers microcontroller.ti.com Security www.ti.com/security Low Power Wireless www.ti.com/lpw Telephony www.ti.com/telephony Video & Imaging www.ti.com/video Wireless www.ti.com/wireless Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2007, Texas Instruments Incorporated