RoboClock® CY7B9945V PRELIMINARY High Speed Multi-phase PLL Clock Buffer Features Functional Description ■ 500 ps max Total Timing Budget (TTB™) window ■ 24 MHz –200 MHz input and Output Operation ■ Low Output-output skew <200 ps ■ 10 + 1 LVTTL outputs driving 50Ω terminated lines The CY7B9945V high speed multi-phase PLL clock buffer offers user selectable control over system clock functions. This multiple output clock driver provides the system integrator with functions necessary to optimize the timing of high performance computer and communication systems. ■ Dedicated feedback output ■ Phase adjustments in 625ps/1300 ps steps up to +10.4 ns ■ 3.3 V LVTTL/LVPECL, Fault Tolerant, and Hot Insertable Reference Inputs ■ Multiply or Divide Ratios of 1 through 6, 8, 10, and 12 ■ Individual Output Bank Disable ■ Output High Impedance Option for Testing Purposes ■ Integrated Phase Locked Loop (PLL) with Lock Indicator ■ Low Cycle-cycle jitter (<100 ps peak-peak) ■ 3.3 V Operation ■ Industrial Temperature Range: –40 °C to +85 °C ■ 52-pin 1.4 mm TQFP package The device features a guaranteed maximum TTB window specifying all occurrences of output clocks. This includes the input reference clock across variations in output frequency, supply voltage, operating temperature, input edge rate, and process. Ten configurable outputs each drive terminated transmission lines with impedances as low as 50Ω while delivering minimal and specified output skews at LVTTL levels. The outputs are arranged in two banks of four and six outputs. These banks enable a divide function of 1 to 12, with phase adjustments in 625 ps–1300 ps increments up to ±10.4 ns. The dedicated feedback output enables divide-by functionality from 1 to 12 and limited phase adjustments. However, if needed, any one of the ten outputs can be connected to the feedback input as well as driving other inputs. Selectable reference input is a fault tolerant feature that enables smooth change over to a secondary clock source when the primary clock source is not in operation. The reference inputs and feedback inputs are configurable to accommodate both LVTTL or Differential (LVPECL) inputs. The completely integrated PLL reduces jitter and simplifies board layout. Logic Block Diagram FS 3 REFA+ REFALO C K REFB+ PLL REFBREFSEL FBK MODE FBF0 3 FBDS0 3 FBDS1 3 1F0 3 1F1 3 1D S0 3 1D S1 3 1F2 3 1F3 3 D iv id e and Phase S e le c t QF 1Q 0 1Q 1 D iv id e and Phase S e le c t 1Q 2 1Q 3 D IS 1 2Q 0 2F0 3 2F1 3 2D S 0 3 2D S1 3 2Q 1 D iv id e and Phase S e le c t 2Q 2 2Q 3 2Q 4 2Q 5 D IS 2 Cypress Semiconductor Corporation Document Number: 38-07336 Rev. *J • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600 Revised March 15, 2011 [+] Feedback PRELIMINARY RoboClock® CY7B9945V Contents Pinouts .............................................................................. 3 Pin Definitions .................................................................. 3 Block Diagram Description .............................................. 4 Time Unit Definition .......................................................... 4 Divide and Phase Select Matrix ....................................... 4 Output Disable Description ............................................. 6 Lock Detect Output Description ................................... 7 Factory Test Mode Description ................................... 7 Safe Operating Zone ................................................... 7 Absolute Maximum Conditions ....................................... 8 Operating Range ............................................................... 8 Electrical Characteristics Over the Operating Range ... 8 Document Number: 38-07336 Rev. *J Capacitance ...................................................................... 9 Ordering Information ...................................................... 11 Package Diagram ............................................................ 12 Acronyms ....................................................................... 13 Document Conventions ................................................. 13 Units of Measure ...................................................... 13 Document History Page ................................................. 14 Sales, Solutions, and Legal Information ...................... 15 Worldwide Sales and Design Support ....................... 15 Products .................................................................... 15 PSoC Solutions ......................................................... 15 Page 2 of 15 [+] Feedback RoboClock® CY7B9945V PRELIMINARY Pinouts REFA+ VCCQ FBK GND QF VCCN 1Q1 VCCN 1Q0 GND FBDS0 FBDS1 LOCK Figure 1. Pin Configuration 52 51 50 49 48 47 46 45 44 43 42 41 40 1 39 2 38 3 37 4 36 5 35 6 34 7 33 8 32 9 31 10 30 11 29 12 28 13 27 14 15 16 17 18 19 20 21 22 23 24 25 26 REFAREFSEL REFBREFB+ 1F2 FS G ND 1Q 2 VCCN 1Q 3 FBF0 1F0 VCCQ DIS2 MODE GND GND 2Q5 VCCN 2Q4 DIS1 1F1 1F3 VCCQ GND CY7B9945V 1DS0 2F1 2F0 2DS1 G ND 2Q 0 VCCN 2Q 1 2Q 2 VCCN 2Q 3 G ND 1DS1 2DS0 Pin Definitions Pin Name IO Type Description 34 FS Input Three level Frequency Select. This input must be set according to the nominal frequency Input (fNOM). See Table 1. 40,39, 36,37 REFA+, REFAREFB+, REFB- Input LVTTL/ LVDIFF Reference Inputs. These inputs can operate as differential PECL or single-ended TTL reference inputs to the PLL. When operating as a single-ended LVTTL input, the complementary input is left open. 38 REFSEL Input LVTTL Reference Select Input. The REFSEL input controls the configuration of reference input When LOW, it uses the REFA pair as the reference input. When HIGH, it uses the REFB pair as the reference input. This input has an internal pull down. 42 FBK Input LVTTL Feedback Input Clock. The PLL operates such that the rising edges of the reference and feedback signals are aligned in phase and frequency. This pin provides the clock output QF feedback to the phase detector. 28,18, 35,17, 2, 1 1F[0:3], 2F[0:1] Input 19,26 DIS[1:2] Input 14,12, 13,3 [1:2]DS[0: 1] Input Three level Output Divider Function Select. Each pair determines the divider ratio of the Input respective bank of outputs. See Table 4. 29 FBF0 Input Three level Feedback Output Phase Function Select. This input determines the phase Input of the QF output. See Table 3. 50,51 FBDS[0:1] Input Three level Feedback Output Divider Function Select. This input determines the divider Input ratio of the QF output. See Table 4. 48,46, 32,30, 5,7,8,10, 20,22 1Q[0:3], 2Q[0:5] Output LVTTL Clock Outputs with Adjustable Phases and fNOM Divide Ratios. The output frequencies and phases are determined by [1:2]DS[0:1], and 1F[0:3] and 2F[0:1], respectively. See Table 3 and Table 4. 44 QF Output LVTTL Feedback Clock Output. This output is connected to the FBK input. The output frequency and phase are determined by FBDS[0:1] and FBF0, respectively. See Table 3 and Table 4. 52 LOCK Output LVTTL PLL Lock Indicator. When HIGH, this output indicates that the internal PLL is locked to the reference signal. When LOW, it indicates that the PLL is attempting to acquire lock Document Number: 38-07336 Rev. *J Three level Output Phase Function Select. Each pair determines the phase of the Input respective bank of outputs. See Table 3. LVTTL Output Disable. Each input controls the state of the respective output bank. When HIGH, the output bank is disabled to HOLD-OFF or High-Z state; the disable state is determined by MODE. When LOW, outputs 1Q[0:3] and 2Q[0:5] are enabled. See Table 5. Page 3 of 15 [+] Feedback RoboClock® CY7B9945V PRELIMINARY Pin Definitions Pin Name 25 MODE IO Input Type Description Three level This pin determines the clock outputs’ disable state. When this input is Input HIGH, the clock outputs disables to high impedance state (High-Z). When this input is LOW, the clock outputs disables to HOLD-OFF mode. When in MID, the device enters factory test mode. 6,9,21, 31, 45, 47 VCCN PWR Power Supply for the Output Buffers 16,27, 41 VCCQ PWR Power Supply for the Internal Circuitry 4,11,15, 23,24, 33,43,49 GND PWR Device Ground Block Diagram Description Divide and Phase Select Matrix The PLL adjusts the phase and the frequency of its output signal to minimize the delay between the reference (REFA/B+, REFA/B-) and the feedback (FB) input signals. The Divide Select Matrix is comprised of three independent banks: two of clock outputs and one for feedback. The Phase Select Matrix, enables independent phase adjustments on 1Q[0:1], 1Q[2:3] and 2Q[0:5]. The frequency of 1Q[0:3] is controlled by 1DS[0:1] while the frequency of 2Q[0:5] is controlled by 2DS[0:1]. The phase of 1Q[0:1] is controlled by 1F[0:1], that of 1Q[2:3] is controlled by 1F[2:3] and that of 2Q[0:5] is controlled by 2F[0:1]. The CY7B9945V has a flexible REF input scheme. These inputs enable the use of either differential LVPECL or single ended LVTTL inputs. To configure as single ended LVTTL inputs, leave the complementary pin open (internally pulled to 1.5 V), then the other input pin is used as a LVTTL input. The REF inputs are also tolerant to hot insertion. The REF inputs are changed dynamically. When changing from one reference input to the other reference input of the same frequency, the PLL is optimized to ensure that the clock outputs period is not less than the calculated system budget (tMIN = tREF (nominal reference period) – tCCJ (cycle-cycle jitter) – tPDEV (max. period deviation)) while reacquiring lock. The FS control pin setting determines the nominal operational frequency range of the divide by one output (fNOM) of the device. fNOM is directly related to the VCO frequency. The FS setting for the device is shown in Table 1. For CY7B9945V, the upper fNOM range extends from 96 MHz to 200 MHz. Table 1. Frequency Range Select fNOM (MHz) FS[1] Min 24 48 96 LOW MID HIGH Max 52 100 200 Time Unit Definition Selectable skew is in discrete increments of time unit (tU). The value of a tU is determined by the FS setting and the maximum nominal output frequency. The equation determines the tU value as follows: The high fanout feedback output buffer (QF) connects to the feedback input (FBK).This feedback output has one phase function select input (FBF0) and two divider function selects FBDS[0:1]. The phase capabilities that are chosen by the phase function select pins are shown in Table 3. The divide capabilities for each bank are shown in Table 4. Table 3. Output Phase Select Control Signal 1F1 1F0 1F3 1F2 2F1 2F0 FBF0 LOW LOW LOW MID LOW HIGH MID LOW MID MID MID HIGH HIGH LOW HIGH MID HIGH HIGH Output Phase Function 1Q[0:1] 1Q[2:3] 2Q[0:5] –4tU –3tU –2tU –1tU 0tU +1tU +2tU +3tU +4tU –4tU –3tU –2tU –1tU 0tU +1tU +2tU +3tU +4tU tU = 1/(fNOM*N). Table 4. Output Divider Select N is a multiplication factor that is determined by the FS setting. fNOM is nominal frequency of the device. N is defined in Table 2. Table 2. N Factor Determination Control Signal [1:2]DS1 [1:2]DS0 and FBDS1 and FBDS0 LOW LOW LOW MID LOW HIGH FS LOW MID HIGH N 32 16 8 CY7B9945V fNOM (MHz) at which tU = 1.0 ns 31.25 62.5 125 Document Number: 38-07336 Rev. *J QF –8tU –4tU –7tU N/A –6tU N/A BK1Q[0:1][2] N/A 0tU 0tU BK1Q[2:3][2] N/A +6tU N/A +7tU N/A +8tU +4tU Output Divider Function Bank1 Bank2 Feedback /1 /2 /3 /1 /2 /3 /1 /2 /3 Page 4 of 15 [+] Feedback RoboClock® CY7B9945V PRELIMINARY Figure 2 shows the timing relationship of programmable skew outputs. All times are measured with respect to REF with the output used for feedback programmed with 0tU skew. The PLL naturally aligns the rising edge of the FB input and REF input. If the output used for feedback is programmed to another skew position, then the whole tU matrix shifts with respect to REF. For example, if the output used for feedback is programmed to shift –4tU, then the whole matrix is shifted forward in time by 4tU. Thus an output programmed with 4tU of skew gets effectively be skewed 8tU with respect to REF. Table 4. Output Divider Select Control Signal [1:2]DS1 [1:2]DS0 and FBDS1 and FBDS0 MID LOW MID MID MID HIGH HIGH LOW HIGH MID HIGH HIGH Output Divider Function Bank1 Bank2 Feedback /4 /5 /6 /8 / 10 / 12 /4 /5 /6 /8 / 10 / 12 /4 /5 /6 /8 / 10 / 12 U U U U U U U U t 0 +1t t 0 +2t t 0 +3t t 0 +4t t 0 +5t t 0 +6t t 0 +7t t 0 +8t t0 t 0 – 1t U t 0 – 2t U t 0 – 3t U t 0 – 4t U t 0 – 5t U t 0 – 6t U t 0 – 7t U t 0 – 8t U Figure 2. Typical Outputs with FB Connected to a Zero-Skew Output[3] FBInput REFInput 1F[1:0] 1F[3:2] 2F[1:0] (N/A) LL –8tU (N/A) LM –7tU (N/A) LH –6tU LL (N/A) –4tU LM (N/A) –3tU LH (N/A) –2tU ML (N/A) –1tU MM MM 0t U MH (N/A) +1t U HL (N/A) +2t U HM (N/A) +3t U HH (N/A) +4t U (N/A) HL +6t U (N/A) HM +7t U (N/A) HH +8t U Document Number: 38-07336 Rev. *J Page 5 of 15 [+] Feedback RoboClock® CY7B9945V PRELIMINARY Output Disable Description The output of each output bank can be independently put into a HOLD OFF or high impedance state. The combination of the MODE and DIS[1:2] inputs determines the clock outputs’ state for each bank. When the DIS[1:2] is LOW, the outputs of the corresponding banks are enabled. When DIS[1:2] is HIGH, the outputs for that bank are disabled to a high impedance (HI-Z) or HOLD OFF state. Table 5 defines the disabled outputs functions. The HOLD OFF state is a power saving feature. An output bank is disabled to the HOLD OFF state in a maximum of six output clock cycles from the time the disable input is HIGH. When disabled to the HOLD OFF state, outputs are driven to a logic LOW state on their falling edges. This makes certain that the output clocks are stopped without a glitch. When a bank of outputs is disabled to HI-Z state, the respective bank of outputs go High-Z immediately. Table 5. DIS[1:2] Functionality MODE DIS[1:2] 1Q[0:3], 2Q[0:5] HIGH/LOW LOW ENABLED HIGH HIGH HI-Z LOW HIGH HOLD-OFF MID X FACTORY TEST Notes 1. FB connected to an output selected for “Zero” skew (i.e., FBF0 = MID or XF[1:0] = MID). 2. The level set on FS is determined by the “nominal” operating frequency (fNOM) of the VCO and Phase Generator. fNOM always appears on an output when the output is operating in the undivided mode. The REF and FB are at fNOM when the output connected to FB is undivided. 3. BK1Q denotes following the skew setting of indicated Bank1 outputs. 4. These inputs are normally wired to VCC, GND, or left unconnected (actual threshold voltages vary as a percentage of VCC). Internal termination resistors hold the unconnected inputs at VCC/2. If these inputs are switched, the function and timing of the outputs may glitch and the PLL may require an additional tLOCK time before all data sheet limits are achieved. 5. This is for non-three level inputs. Document Number: 38-07336 Rev. *J Page 6 of 15 [+] Feedback RoboClock® CY7B9945V PRELIMINARY Lock Detect Output Description The LOCK detect output indicates the lock condition of the integrated PLL. Lock detection is accomplished by comparing the phase difference between the reference and feedback inputs. Phase error is declared when the phase difference between the two inputs is greater than the specified device propagation delay limit tPD. When in the locked state, after four or more consecutive feedback clock cycles with phase errors, the LOCK output is forced LOW to indicate out-of-lock state. When in the out-of-lock state, 32 consecutive phase errorless feedback clock cycles are required to enable the LOCK output to indicate lock condition (LOCK = HIGH). If the feedback clock is removed after LOCK has gone HIGH, a “Watchdog” circuit is implemented to indicate the out-of-lock condition after a time-out period by deasserting LOCK LOW. This time out period is based upon a divided down reference clock. This assumes that there is activity on the selected REF input. If there is no activity on the selected REF input then the LOCK detect pin does not accurately reflect the state of the internal PLL. the divide, skew and frequency selection. All clock outputs stay in High-Z mode and all FSMs stay in the deterministic state until DIS2 is deasserted. This causes the device to reenter factory test mode. Safe Operating Zone Figure 3 shows the operating condition of the device not exceeding its allowable maximum junction temperature of 150°C. Figure 3 shows the maximum number of outputs that can operate at 185 MHz (with 25 pF load and no air flow) or 200 MHz (with 10-pF load and no air flow) at various ambient temperatures. At the limit line, all other outputs are configured to divide-by-two (i.e., operating at 92.5 MHz) or lower frequencies. The device operates below maximum allowable junction temperature of 150°C when its configuration (with the specified constraints) falls within the shaded region (safe operating zone). Figure 3 shows that at 85°C, the maximum number of outputs that can operate at 200 MHz is 6. Figure 3. Typical Safe Operating Zone Typical Safe Operating Zone (25-pF Load, 0-m/s air flow) Factory Test Mode Description When in the test mode, the device is reset to a deterministic state by driving the DIS2 input HIGH. Doing so disables all outputs and, after the selected reference clock pin has five positive transitions, all internal finite state machines (FSM) are set at a deterministic state. The states depend on the configurations of Document Number: 38-07336 Rev. *J 100 Ambient Temperature (C) The device enters factory test mode when the MODE is driven to MID. In factory test mode, the device operates with its internal PLL disconnected; input level supplied to the reference input is used in place of the PLL output. In TEST mode the FB input is tied LOW. All functions of the device remain operational in factory test mode except the internal PLL and output bank disables. The MODE input is designed as a static input. Dynamically toggling this input from LOW to HIGH temporarily causes the device to go into factory test mode (when passing through the MID state). 95 90 85 80 75 70 Safe Operating Zone 65 60 55 50 2 4 6 8 10 Number of Outputs at 185 MHz Page 7 of 15 [+] Feedback RoboClock® CY7B9945V PRELIMINARY Absolute Maximum Conditions Static Discharge Voltage.......................................... > 1100 V (MIL-STD-883, Method 3015) Exceeding maximum ratings may shorten the useful life of the device. User guidelines are not tested. Latch-up Current.................................................. > ± 200 mA Storage Temperature ............................... –40 °C to +125 °C Ambient Temperature with Power Applied ................................... –40 °C to +125 °C Operating Range Range Supply Voltage to Ground Potential..............–0.5 V to +4.6 V Commercial DC Input Voltage ................................... –0.3 V to VCC+0.5 V Industrial Ambient Temperature VCC 0°C to +70°C 3.3 V ±10% –40°C to +85°C 3.3 V ±10% Output Current into Outputs (LOW) ............................. 40 mA Electrical Characteristics Over the Operating Range Description LVTTL HIGH Voltage (QF, 1Q[0:3], 2Q[0:5]) LOCK LVTTL LOW Voltage (QF, 1Q[0:3], 2Q[0:5]) LOCK High impedance State Leakage Current LVTTL Input HIGH LVTTL Input LOW LVTTL VIN >VCC LVTTL Input HIGH Current LVTTL Input LOW Current Three level Input HIGH[4] Three level Input MID[4] Three level Input LOW[4] Three level Input HIGH FS[0:2],IF[0:3],FBDS[0:1] Current 2F[0:1],[1:2]DS[0:1],FBFO Three level Input MID FS[0:2],IF[0:3],FBDS[0:1] Current 2F[0:1],[1:2]DS[0:1],FBFO Three level Input LOW FS[0:2],IF[0:3],FBDS[0:1] Current 2F[0:1],[1:2]DS[0:1],FBFO Input Differential Voltage Highest Input HIGH Voltage Lowest Input LOW Voltage Common Mode Range (Crossing Voltage) Internal Operating CY7B9945V Current CY7B9945V Output Current Dissipation/Pair[4] Document Number: 38-07336 Rev. *J Test Conditions VCC = Min, IOH = –30 mA IOH = –2 mA, VCC = Min Min 2.4 2.4 – – –100 Min < VCC < Max 2.0 Min. < VCC < Max. –0.3 VCC = GND, VIN = 3.63 V – VCC = Max, VIN = VCC – VCC = Max, VIN = GND –500 Min < VCC < Max 0.87 * VCC Min < VCC < Max 0.47 * VCC Min < VCC < Max – VIN = VCC – – VIN = VCC/2 –50 –100 VIN = GND –200 –400 400 1.0 GND 0.8 VCC = Max, fMAX[5] – VCC = Min, IOL= 30 mA IOL= 2 mA, VCC = Min VCC = Max, CLOAD = 25 pF, RLOAD = 50Ω at VCC/2, fMAX – Max – Unit V – 0.5 0.5 100 VCC + 0.3 0.8 100 500 – – 0.53 * VCC 0.13 * VCC 200 400 50 100 – – VCC VCC VCC – 0.4 VCC – 0.2 250 V V V μA V V μA μA μA V V V μA μA μA μA μA μA mV V V V mA 40 mA Page 8 of 15 [+] Feedback RoboClock® CY7B9945V PRELIMINARY Capacitance Parameter CIN Description Test Conditions Min Max Unit – 5 pF TA = 25°C, f = 1 MHz, VCC = 3.3 V Input Capacitance Switching Characteristics Over the Operating Range [5, 7, 8, 9, 10] Parameter CY7B9945V-2 CY7B9945V-5 Description Min Max Min Max Unit fin Clock Input Frequency 24 200 24 200 MHz fout Clock Output Frequency 24 200 24 200 MHz Skew[12, 13],1Q[0:1],1Q[2:3],2Q[0:1],2Q[2:3],2Q[4:5] tSKEWPR Matched Pair – 200 – 200 ps tSKEWBNK Intrabank Skew[12, 13] – 250 – 250 ps tSKEW0 Output-Output Skew (same frequency and phase, rise to rise, fall to fall)[12, 13] – 250 – 550 ps tSKEW1 Output-Output Skew (same frequency and phase, other banks at different frequency, rise to rise, fall to fall)[12, 13] – 250 – 650 ps tSKEW2 Output-Output Skew (all output configurations outside of tSKEW0 and tSKEW1)[10, 11] – 500 – 800 ps tCCJ1-3 Cycle-to-Cycle Jitter (divide by 1 output frequency, FB = divide by 1, 2, 3) – 150 – 150 ps PeakPeak tCCJ4-12 Cycle-to-Cycle Jitter (divide by 1 output frequency, FB = divide by 4, 5, 6, 8, 10, 12) – 100 – 100 ps PeakPeak tPD Propagation Delay, REF to FB Rise –250 250 –500 500 ps – 500 – 700 ps – 200 – 200 ps tREFpwh REF input (Pulse Width HIGH)[5] 2.0 – 2.0 – ns tREFpwl REF input (Pulse Width LOW)[5] 2.0 – 2.0 – ns phase)[14, 15] TTB Total Timing Budget window (same frequency and tPDDELTA Propagation Delay difference between two devices[16] Time[17] tr/tf Output Rise/Fall 0.15 2.0 0.15 2.0 ns tLOCK PLL Lock TIme From Power Up – 10 – 10 ms tRELOCK1 PLL Relock Time (from same frequency, different phase) with Stable Power Supply – 500 – 500 μs tRELOCK2 PLL Re-lock Time (from different frequency, different phase) with Stable Power Supply[16] – 1000 – 1000 μs tODCV Output duty cycle deviation from 50%[11] –1.0 1.0 –1.0 1.0 ns tPWH Output HIGH time deviation from 50%[19] – 1.5 – 1.5 ns tPWL [19] Output LOW time deviation from 50% – 2.0 – 2.0 ns tPDEV Period deviation when changing from reference to reference[20] – 0.025 – 0.025 UI 1.0 10 1.0 10 ns 0.5 14 0.5 14 ns ACTIVE[12, 21] tOAZ DIS[1:2] HIGH to output high-impedance from tOZA DIS[1:2] LOW to output ACTIVE from output is high impedance[21] Notes 6. Assumes 25 pF Maximum Load Capacitance up to 185 MHz. At 200 MHz the maximum load is 10 pF. 7. Both outputs of pair must be terminated, even if only one is being used. 8. Each package must be properly decoupled. 9. AC parameters are measured at 1.5 V, unless otherwise indicated. 10. Test Load CL= 25 pF, terminated to VCC/2 with 50Ω up to185 MHz and 10 pF load to 200 MHz. 11. SKEW is defined as the time between the earliest and the latest output transition among all outputs for which the same phase delay has been selected when all outputs are loaded with 25 pF and properly terminated up to 185 MHz. At 200 MHz the max load is 10 pF. 12. Tested initially and after any design or process changes that affect these parameters. 13. TTB is the window between the earliest and the latest output clocks with respect to the input reference clock across variations in output frequency, supply voltage, operating temperature, input clock edge rate, and process. The measurements are taken with the AC test load specified and include output-output skew, cycle-cycle jitter, and dynamic phase error. TTB is equal to or smaller than the maximum specified value at a given output frequency. Document Number: 38-07336 Rev. *J Page 9 of 15 [+] Feedback RoboClock® CY7B9945V PRELIMINARY Figure 4. AC Test Loads and Waveforms 3.3 V For LOCK output only R1 = 910 Ω R2 = 910 Ω CL < 30 pF For all other outputs R1 = 100Ω R2 = 100Ω CL < 25 pF to 185 MHz or 10 pF at 200 MHz (Includes fixture and probe capacitance) R1 OUTPUT CL R2 (a) LVTTL AC Test Load 3.3 V 2.0 V 2.0 V 0.8 V 0.8 V GND < 1 ns < 1 ns (b) TTL Input Test Waveform Figure 5. AC Timing Diagram tREFpwl tREFpwh [1:2]Q[0,2] REF t SKEWPR t SKEWPR t PWH tPD t PWL [1:2]Q[1,3] 2.0 V FB 0.8 V tCCJ1-3,4-12 Q [1:2]Q[0:3] t SKEWBNK t SKEWBNK [1:2]Q[0:3] REF TO DEVICE 1 and 2 tODCV tODCV tPD Q FB DEVICE1 tPDELTA tPDELTA t SKEW0,1 t SKEW0,1 Other Q FB DEVICE2 . Notes 14. Guaranteed by statistical correlation. Tested initially and after any design or process changes that affects these parameters. 15. Rise and fall times are measured between 2.0 V and 0.8 V. 16. fNOM must be within the frequency range defined by the same FS state. 17. tPWH is measured at 2.0 V. tPWL is measured at 0.8 V. 18. UI = unit interval. Examples: 1 UI is a full period. 0.1UI is 10% of period. 19. Measured at 0.5 V deviation from starting voltage. 20. For tOZA minimum, CL = 0 pF. For tOZA maximum, CL= 25 pF to 185 MHz or 10 pF to 200 MHz 21. These figures are for illustration purposes only. The actual ATE loads may vary. Document Number: 38-07336 Rev. *J Page 10 of 15 [+] Feedback RoboClock® CY7B9945V PRELIMINARY Ordering Information Propagation Delay (ps) Max. Speed (MHz) Package Name Ordering Code Package Type Operating Range Pb-free 250 250 200 CY7B9945V-2AXC AZ52 52-pin TQFP Commercial 200 CY7B9945V-2AXCT AZ52 52-pin TQFP – Tape and Reel Commercial 200 CY7B9945V-2AXI AZ52 52-pin TQFP Industrial 200 CY7B9945V-2AXIT AZ52 52-pin TQFP – Tape and Reel Industrial Ordering Code Definitions CY XXXXXX V - 2 A X C T T = Tape and reel, Blank = Tube Temperature range: C = Commercial Pb-free, Blank = leaded 52-pin TQFP package Speed grade Operating voltage: 3.3 V Part identifier Company Code: CY = Cypress Document Number: 38-07336 Rev. *J Page 11 of 15 [+] Feedback PRELIMINARY RoboClock® CY7B9945V Package Diagram Figure 6. 52-Pin Thin Plastic Quad Flat Pack (10 × 10 × 1.4 mm) A52 and AZ52 51-85131 *A Document Number: 38-07336 Rev. *J Page 12 of 15 [+] Feedback PRELIMINARY RoboClock® CY7B9945V Acronyms Table 6. Acronyms Used in this Documnent Acronym FSM LVPECL LVTTL OE RMS PLL TQFP VCO Description Finite State Machine Low-voltage positive emitter coupled logic Low-voltage transistor transistor logic Output enable Root mean square Phase locked loop Thin quad flat pack Voltage controlled oscillator Document Conventions Units of Measure Table 7. Units of Measure Symbol °C dB dBc/Hz fC fF Hz KB Kbit kHz kΩ MHz MΩ µA µF µH µs µV Unit of Measure degrees Celsius decibels decibels relative to the carrier per Hertz femtoCoulomb femtofarads hertz 1024 bytes 1024 bits kilohertz kilohms megahertz megaohms microamperes microfarads microhenrys microseconds microvolts Document Number: 38-07336 Rev. *J Symbol µVrms µW mA mm ms mV nA ns nV Ω pA pF pp ppm ps sps σ Unit of Measure microvolts root-mean-square microwatts milliamperes millimeters milliseconds millivolts nanoamperes nanoseconds nanovolts ohms picoamperes picofarads peak-to-peak parts per million picoseconds samples per second sigma: one standard deviation Page 13 of 15 [+] Feedback RoboClock® CY7B9945V PRELIMINARY Document History Page Document Title: CY7B9945V RoboClock® High Speed Multi-phase PLL Clock Buffer Document Number: 38-07336 Revision ECN Orig. of Change Submission Date ** 111747 CTK 03/04/02 New Data Sheet *A 116572 HWT 09/05/02 Added TTB Features *B 119078 HWT 10/16/02 Corrected the following items in the Electrical Characteristics table: IIIL,IIIH,IIIM specifications from: three level input pins excluding FBFO to FS[0:2],IF[0:3],FBDS[0:1] and FBFO to 2F[0:1],[1:2]DS[0:1],FBFO Common Mode Range (VCOM) from VCC to VCC–0.2 Corrected typo TQFP to LQFP in Features Description of Change *C 124645 RGL 03/20/03 Corrected typo LQFP to TQFP in Features *D 128464 RGL 07/25/03 Added clock input frequency (fin) specifications in the switching characteristics table. *E 272075 RGL See ECN Minor Change: Fixed the Typical Outputs (Fig. 1) diagram *F 1187144 KVM See ECN Updated Ordering Information table, primarily to add Pb-free devices *G 2761988 CXQ 09/10/09 Changed instances of “50W” to “50Ω” on page 1. Changed “Pb” to “lead” in Ordering Information package type section. Added “Not recommended for new designs” note to all Pb packages. *H 2891379 KVM 03/12/2010 Added Table of Contents Updated Ordering Information table Updated Package Diagram Updated Sales, Solutions, and Legal Information *I 2905846 KVM 04/06/2010 Removed inactive part from Ordering Information table. *J 3196237 BASH 03/15/11 Document Number: 38-07336 Rev. *J Template updates. Included ordering code definitions, acronyms, and units of measure. Page 14 of 15 [+] Feedback RoboClock® CY7B9945V PRELIMINARY Sales, Solutions, and Legal Information Worldwide Sales and Design Support Cypress maintains a worldwide network of offices, solution centers, manufacturer’s representatives, and distributors. To find the office closest to you, visit us at Cypress Locations. Products Automotive Clocks & Buffers Interface Lighting & Power Control PSoC Solutions cypress.com/go/automotive cypress.com/go/clocks psoc.cypress.com/solutions cypress.com/go/interface PSoC 1 | PSoC 3 | PSoC 5 cypress.com/go/powerpsoc cypress.com/go/plc Memory Optical & Image Sensing cypress.com/go/memory cypress.com/go/image PSoC cypress.com/go/psoc Touch Sensing cypress.com/go/touch USB Controllers Wireless/RF cypress.com/go/USB cypress.com/go/wireless © Cypress Semiconductor Corporation, 2002-2011. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges. Any Source Code (software and/or firmware) is owned by Cypress Semiconductor Corporation (Cypress) and is protected by and subject to worldwide patent protection (United States and foreign), United States copyright laws and international treaty provisions. Cypress hereby grants to licensee a personal, non-exclusive, non-transferable license to copy, use, modify, create derivative works of, and compile the Cypress Source Code and derivative works for the sole purpose of creating custom software and or firmware in support of licensee product to be used only in conjunction with a Cypress integrated circuit as specified in the applicable agreement. Any reproduction, modification, translation, compilation, or representation of this Source Code except as specified above is prohibited without the express written permission of Cypress. Disclaimer: CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Cypress reserves the right to make changes without further notice to the materials described herein. Cypress does not assume any liability arising out of the application or use of any product or circuit described herein. Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress’ product in a life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges. Use may be limited by and subject to the applicable Cypress software license agreement. Document Number: 38-07336 Rev. *J Revised March 15, 2011 Page 15 of 15 PSoC Designer™, Programmable System-on-Chip™, and PSoC Express™ are trademarks and PSoC® is a registered trademark of Cypress Semiconductor Corp. All other trademarks or registered trademarks referenced herein are property of the respective corporations.Purchase of I2C components from Cypress or one of its sublicensed Associated Companies conveys a license under the Philips I2C Patent Rights to use these components in an I2C system, provided that the system conforms to the I2C Standard Specification as defined by Philips.All products and company names mentioned in this document may be the trademarks of their respective holders. RoboClock is a registered trademark, and Total Timing Budget and TTB are trademarks of Cypress Semiconductor. [+] Feedback