CY7B995AXCT

RoboClock®, CY7B995 2.5/3.3V 200-MHz High-Speed Multi-Phase PLL Clock Buffer Features ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Description The CY7B995 RoboClock® is a low voltage, low power, eight-output, 200 MHz clock driver. It features output phase programmability which is necessary to optimize the timing of high performance computer and communication systems. The user can program both the frequency and the phase of the output banks through nF[0:1] and DS[0:1] pins. The adjustable phase feature allows the user to skew the outputs to lead or lag the reference clock. Any one of the outputs can be connected to feedback to achieve different reference frequency multiplication, and divide ratios and zero input-output delay. The device also features split output bank power supplies, which enable the user to run two banks (1Qn and 2Qn) at a power supply level, different from that of the other two banks (3Qn and 4Qn). The three-level PE/HD pin also controls the synchronization of the output signals to either the rising, or the falling edge of the reference clock and selects the drive strength of the output buffers. The high drive option (PE/HD = MID) increases the output current from ± 12 mA to ± 24 mA. 2.5V or 3.3V operation Split output bank power supplies Output frequency range: 6 MHz to 200 MHz 45 ps typical cycle-cycle jitter ± 2% max output duty cycle Selectable output drive strength Selectable positive or negative edge synchronization Eight LVTTL outputs driving 50 Ω terminated lines LVCMOS/LVTTL over-voltage tolerant reference input Selectable phase-locked loop (PLL) frequency range and lock indicator Phase adjustments in 625/1250 ps steps up to ± 7.5 ns (1-6, 8, 10, 12) x multiply and (1/2,1/4)x divide ratios Spread-Spectrum compatible Power down mode Selectable reference divider Industrial temperature range: –40°C to +85°C 44-pin TQFP package Logic Block Diagram TEST P E/HD PD#/DIV REF 3 FS VDDQ1 /R /N 3 3 3 3 3 PLL FB DS1:0 3 LOCK 1Q0 Phase Select 1F1:0 3 1Q1 3 2Q0 Phase Select 2F1:0 3 2Q1 3 3F1:0 3 Phase Select and /K 3Q0 3Q1 VDDQ3 3 4F1:0 3 Phase Select and /M 4Q0 4Q1 VDDQ4 sOE# Cypress Semiconductor Corporation Document #: 38-07337 Rev. *D • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600 Revised September 27, 2007 [+] Feedback RoboClock®, CY7B995 Pinouts Figure 1. Pin Diagram - 44 Pin TQFP Package Top view FS VDD REF VSS TES T 2F1 2F0 VDD VDDQ1 4F0 3F1 3F0 1F1 33 1F0 32 DS1 31 DS0 30 LOCK 29 VDDQ1 CY7B995 28 VDDQ1 27 1Q0 26 1Q1 25 VSS 24 VSS 23 VSS 44 43 42 41 40 39 38 37 36 35 34 4F1 1 sOE# 2 PD#/DIV 3 PE/HD 4 VDDQ4 5 VDDQ4 6 4Q1 7 4Q0 8 VSS 9 VSS 10 VSS 11 3Q1 3Q0 VDDQ3 VSS 12 13 14 15 16 17 18 19 20 21 22 VDDQ3 FB 2Q1 2Q0 VSS Document #: 38-07337 Rev. *D Page 2 of 13 [+] Feedback RoboClock®, CY7B995 Table 1. Pin Definitions - 44 Pin TQFP Package Pin 39 17 37 2 Name REF FB TEST sOE# IO[1] I I I Type LVTTL/LVCMOS LVTTL 3-Level Reference Clock Input. Feedback Input. When MID or HIGH, disables PLL[3]. REF goes to all outputs. Set LOW for normal operation. Synchronous Output Enable. When HIGH, it stops clock outputs (except 2Q0 and 2Q1) in a LOW state (for PE/HD = H or M) – 2Q0, and 2Q1 may be used as the feedback signal to maintain phase lock. When TEST is held at MID level and sOE# is HIGH, the nF[1:0] pins act as output disable controls for individual banks when nF[1:0] = LL. Set sOE# LOW for normal operation. Selects Positive or Negative Edge Control, and High or Low output Drive Strength. When LOW/HIGH, the outputs are synchronized with the negative/positive edge of the reference clock respectively. When at MID level, the output drive strength is increased and the outputs synchronize with the positive edge of the reference clock. See Table 10 on page 5. Selects Frequency and Phase of the Outputs. See Table 4, Table 5, Table 6, Table 8, and Table 9 on page 4. Selects VCO Operating Frequency Range. See Table 7 on page 4. Four banks of two outputs. See Table 6 on page 4 for frequency settings. Selects Feedback Divider. See Table 3 on page 4. Power down and Reference Divider Control. When LOW, shuts off entire chip. When at MID level, enables the reference divider. See Table 2 for settings. PLL Lock Indication Signal. HIGH indicates lock, LOW indicates the PLL is not locked, and outputs may not be synchronized to the input. Power supply for Bank 4 Output Buffers. See Table 11 on page 5 for supply level constraints. Power supply for Bank 3 Output Buffers. See Table 11 on page 5 for supply level constraints. Power supply for Bank 1 and Bank 2 Output Buffers. See Table 11 on page 5 for supply level constraints. Power supply for the Internal Circuitry. See Table 11 on page 5 for supply level constraints. Ground Table 2. Reference Divider Settings PD#/DIV R–Reference Divider H M L[4] 1 2 N/A Description I, PD LVTTL 4 PE/HD I, PU 3-Level 34, 33, 36, 35, nF[1:0] 43, 42, 1, 44 41 26,27,20,21, 13,14,7,8 32, 31 3 FS nQ[1:0] DS[1:0] PD#/DIV I I O I 3-Level 3-Level LVTTL 3-Level I, PU 3-Level 30 5,6 15,16 19,28,29 18,40 LOCK O LVTTL VDDQ4[2] PWR Power VDDQ3 [2] PWR Power VDDQ1[2] VDD[2] PWR Power PWR Power PWR Power 9-12, 22-25, 38 VSS Device Configuration The outputs of the CY7B995 can be configured to run at frequencies ranging from 6 MHz to 200 MHz. The feedback input divider is controlled by the 3-level DS[0:1] pins as indicated in Table 3 on page 4, and the reference input divider is controlled by the 3-level PD#/DIV pin as indicated in Table 2. Notes 1. PD indicates an internal pull down and ‘PU’ indicates an internal pull up. 2. A bypass capacitor (0.1μF) must be placed as close as possible to each positive power pin (< 0.2”). If these bypass capacitors are not close to the pins, their high frequency filtering characteristic is cancelled by the lead inductance of the traces. 3. When TEST = MID and sOE# = HIGH, PLL remains active with nF[1:0] = LL functioning as an output disable control for individual output banks. Skew selections remain in effect unless nF[1:0] = LL. 4. When PD#/DIV = LOW, the device enters power down mode. Document #: 38-07337 Rev. *D Page 3 of 13 [+] Feedback RoboClock®, CY7B995 Table 3. Feedback Divider Settings DS[1:0] N-Feedback Input Divider LL LM LH ML MM MH HL HM HH 2 3 4 5 1 6 8 10 12 Permitted Output Divider Connected to FB 1 or 2 1 1,2 or 4 1 or 2 1,2 or 4 1 or 2 1 or 2 1 1 Configuration FB Input Connected to Output Frequency 1Q[0:1] and 2Q[0:1][6] 3Q[0:1] 4Q[0:1] 4Qn (N / R) x M x (N / R) x (M / (N / R) x FREF FREF K) x FREF The 3-level FS control pin setting determines the nominal operating frequency range of the divide-by-one outputs of the device. The CY7B995 PLL operating frequency range that corresponds to each FS level is given in Table 7. Table 7. Frequency Range Select FS L M H PLL Frequency Range 24 to 50 MHz 48 to 100 MHz 96 to 200 MHz In addition to the reference and feedback dividers, the CY7B995 includes output dividers on Bank3 and Bank4, which are controlled by 3F[1:0] and 4F[1:0] as indicated in Table 4 and Table 5, respectively. Table 4. Output Divider Settings – Bank 3 3F[1:0] LL HH Other[5] K - Bank3 Output Divider 2 4 1 Selectable output skew is in discrete increments of time units (tU).The value of tU is determined by the FS setting and the maximum nominal frequency. The equation used to determine the tU value is: tU = 1 / (fNOM x MF) where MF is a multiplication factor which is determined by the FS setting as indicated in Table 8. Table 8. MF Calculation FS L M H MF 32 16 8 fNOM at which tU is 1.0 ns (MHz) 31.25 62.5 125 Table 5. Output Divider Settings – Bank 4 4F[1:0] LL Other[5] M- Bank4 Output Divider 2 1 Table 9. Output Skew Settings nF[1:0] LL[7] LM LH 4Q[0:1] The divider settings and the FB input to any output connection needed to produce various output frequencies are summarized in Table 6. Table 6. Output Frequency Settings. Configuration FB Input Connected to Skew (1Q[0:1],2Q[0:1]) –4tU –3tU –2tU –1tU Zero Skew +1tU +2tU +3tU +4tU Skew (3Q[0:1]) Divide By 2 –6tU –4tU –2tU Zero Skew +2tU +4tU +6tU Divide By 4 Skew (4Q[0:1]) Divide By 2 –6tU –4tU –2tU Zero Skew +2tU +4tU +6tU Inverted[8] Output Frequency 1Q[0:1] and 2Q[0:1][6] 3Q[0:1] ML MM MH HL HM HH 1Qn or 2Qn 3Qn (N / R) x FREF (N / R) x (1 / (N / R) x (1 / K) x FREF M) x FREF (N / R) x K x (N / R) x FREF (N / R) x (K / FREF M) x FREF Notes 5. These states are used to program the phase of the respective banks. See Table 8 and Table 9. 6. These outputs are undivided copies of the VCO clock. The formulas in this column can be used to calculate the VCO operating frequency (FNOM) at a given reference frequency (FREF), and divider and feedback configuration. The user must select a configuration and a reference frequency that generates a VCO frequency, and is within the range specified by FS pin. See Table 7. Document #: 38-07337 Rev. *D Page 4 of 13 [+] Feedback RoboClock®, CY7B995 In addition to determining whether the outputs synchronize to the rising or the falling edge of the reference signal, the 3-level PE/HD pin controls the output buffer drive strength as indicated in Table 10 on page 5. Refer to the AC Timing Definitions section for a description of input-to-output and output-to-output phase relationships. Table 10. PE/HD Settings PE/HD L M H Synchronization Negative Positive Positive Output Drive Strength[9] Low Drive High Drive Low Drive Table 11. Power Supply Constraints VDD 3.3V 2.5V VDDQ1[10] 3.3V or 2.5V 2.5V VDDQ3[10] 3.3V or 2.5V 2.5V VDDQ4[10] 3.3V or 2.5V 2.5V Governing Agencies The following agencies provide specifications that apply to the CY7B995. The agency name and relevant specification is listed below. Table 12. Governing Agencies and Specifications Agency Name JEDEC IEEE UL-194_V0 MIL Specification JESD 51 (Theta JA) JESD 65 (Skew, Jitter) 1596.3 (Jiter Specs) 94 (Moisture Grading) 883E Method 1012.1 (Therma Theta JC) The CY7B995 features split power supply buses for Banks 1 and 2, Bank 3 and Bank 4, which enables the user to obtain both 3.3V and 2.5V output signals from one device. The core power supply (VDD) must be set at a level that is equal to or higher than any of the output power supplies. Absolute Maximum Conditions Parameter VDD VDD VIN(MIN) VIN(MAX) VREF(MAX) VREF(MAX) TS TA TJ ØJC ØJA ESDHBM UL-94 MSL FIT Description Operating Voltage Operating Voltage Input Voltage Input Voltage Reference Input Voltage Reference Input Voltage Temperature, Storage Temperature, Operating Ambient Temperature, Junction Dissipation, Junction to Case Dissipation, Junction to Ambient ESD Protection (Human Body Model) Flammability Rating Moisture Sensitivity Level Failure in Time Manufacturing Testing Condition Functional @ 2.5V ± 5% Functional @ 3.3V ± 10% Relative to VSS Relative to VDD VDD = 3.3V VDD = 2.5V Non Functional Functional Functional Mil-Spec 883E Method 1012.1 JEDEC (JESD 51) MIL-STD-883, Method 3015 @1/8 in. –65 –40 – – – 2000 V–0 1 10 ppm Min 2.25 2.97 VSS – 0.3 – Max 2.75 3.63 – VDD + 0.3 5.5 4.6 +150 +85 155 42 74 – Unit V V V V V V °C °C °C °C/W °C/W V Notes 7. LL disables outputs if TEST = MID and sOE# = HIGH. 8. When 4Q[0:1] are set to run inverted (HH mode), sOE# disables these outputs HIGH when PE/HD = HIGH or MID, sOE# disables them LOW when PE/HD = LOW. 9. Please refer to “DC Parameters” section for IOH/IOL specifications. 10. VDDQ1/3/4 must not be set at a level higher than that of VDD. They can be set at different levels from each other, e.g., VDD = 3.3V, VDDQ1 = 3.3V, VDDQ3 = 2.5V and VDDQ4 = 2.5V. Document #: 38-07337 Rev. *D Page 5 of 13 [+] Feedback RoboClock®, CY7B995 . DC Specifications at 2.5V Parameter VDD VIL VIH VIHH [11] Description 2.5 Operating Voltage Input LOW Voltage Input HIGH Voltage Input HIGH Voltage Input MID Voltage Input LOW Voltage Input Leakage Current 2.5V ± 5% Condition REF, FB, and sOE# Inputs 3-Level Inputs, (TEST, FS, nF[1:0], DS[1:0], PD#/DIV, PE/HD). (These pins are normally wired to VDD, GND, or unconnected) Min 2.375 – 1.7 VDD – –0.4 VDD/2 – 0.2 – –5 – –50 –200 –25 – – – 2.0 2.0 2.0 – 10(typ.) 150 4 Max 2.625 0.7 – – VDD/2 + 0.2 0.4 5 200 50 – – 100 0.4 0.4 0.4 – – 2 25 Unit V V V V V V μA μA μA μA μA μA V V V V V V mA μA mA pF VIMM[11] VILL[11] IIL I3 VIN = VDD/GND,VDD = Max; (REF and FB Inputs) MID, VIN = VDD/2 LOW, VIN = VSS 3-Level Inputs (TEST, FS, nF[1:0], DS[1:0], PD#/DIV, PE/HD) 3-Level Input DC Current HIGH, VIN = VDD IPU IPD VOL Input Pull-Up Current Input Pull-Down Current Output LOW Voltage VIN = VSS, VDD = Max VIN = VDD, VDD = Max, (sOE#) IOL = 12 mA (PE/HD = L/H), (nQ[0:1]) IOL = 20 mA (PE/HD = MID),(nQ[0:1]) IOL = 2 mA (LOCK) VOH Output HIGH Voltage IOH = –12 mA (PE/HD = L/H),(nQ[0:1]) IOH = –20 mA (PE/HD = MID),(nQ[0:1]) IOH = –2 mA (LOCK) IDDQ IDDPD IDD CIN Quiescent Supply Current VDD = Max, TEST = MID, REF = LOW, sOE# = LOW, Outputs Not Loaded Power down Current Dynamic Supply Current Input Pin Capacitance PD#/DIV, sOE# = LOW Test,nF[1:0],DS[1:0] = HIGH; VDD = Max At 100 MHz Document #: 38-07337 Rev. *D Page 6 of 13 [+] Feedback RoboClock®, CY7B995 DC Specifications at 3.3V Parameter VDD VIL VIH VIHH[11] VIMM[11] VILL[11] IIL I3 Description 3.3 Operating Voltage Input LOW Voltage Input HIGH Voltage Input HIGH Voltage Input MID Voltage Input LOW Voltage Input Leakage Current 3-Level Input DC Current VIN = VDD/GND,VDD = Max (REF and FB inputs) HIGH, VIN = VDD MID, VIN = VDD/2 LOW, VIN = VSS IPU IPD VOL Input Pull Up Current Input Pull Down Current Output LOW Voltage VIN = VSS, VDD = Max VIN = VDD, VDD = Max, (sOE#) IOL = 12 mA (PE/HD = L/H), (nQ[0:1]) IOL = 24 mA (PE/HD = MID),(nQ[0:1]) IOL = 2 mA (LOCK) VOH Output HIGH Voltage IOH = –12 mA (PE/HD = L/H),(nQ[0:1]) IOH = –24 mA (PE/HD = MID),(nQ[0:1]) IOH = –2 mA (LOCK) IDDQ Quiescent Supply Current VDD = Max, TEST = MID, REF = LOW, sOE# = LOW, Outputs Not Loaded Power Down Current Dynamic Supply Current Input Pin Capacitance PD#/DIV, sOE# = LOW, Test,nF[1:0],DS[1:0] = HIGH, VDD = Max At 100 MHz 2.4 2.4 2.4 – 2 3-Level Inputs, (TEST, FS, nF[1:0], DS[1:0], PD#/DIV, PE/HD) 3.3V ± 10% REF, FB and sOE# Inputs Condition Min 2.97 – 2.0 Max 3.63 0.8 – Unit V V V V V V μA μA μA μA μA μA V V V V V V mA 3-Level Inputs VDD– – (TEST, FS, nF[1:0], DS[1:0],PD#/DIV, PE/HD); (These pins –0.6 are normally wired to VDD,GND or unconected VDD/2 – VDD/2 + 0.3 0.3 – –5 – –50 –200 –25 – – – 0.6 5 200 50 – – 100 0.4 0.4 0.4 – – IDDPD IDD CIN 10(typ.) 230 4 25 μA mA pF AC Input Specifications Parameter TR,TF TPWC TDCIN FREF Description Input Rise/Fall Time Input Clock Pulse Input Duty Cycle Reference Input Frequency[12] FS = LOW FS = MID FS = HIGH 0.8V – 2.0V HIGH or LOW Condition Min – 2 10 2 4 8 Max 10 – 90 50 100 200 Unit ns/V ns % MHz Document #: 38-07337 Rev. *D Page 7 of 13 [+] Feedback RoboClock®, CY7B995 Switching Characteristics Parameter FOR VCOLR VCOLBW tSKEWPR tSKEW0 tSKEW1 Description Output frequency range VCO Lock Range VCO Loop Bandwidth Matched-Pair Skew[13] Output-Output Skew[13] Skew between the earliest and the latest output transitions within the same bank. Skew between the earliest and the latest output transitions among all outputs at 0tU. Skew between the earliest and the latest output transitions among all outputs for which the same phase delay has been selected. Skew between the nominal output rising edge to the inverted output falling edge. Skew between non-inverted outputs running at different frequencies. Output-Output Skew[13] Skew between nominal to inverted outputs running at different frequencies. Skew between nominal outputs at different power supply levels. Part-Part Skew Skew between the outputs of any two devices under identical settings and conditions (VDDQ, VDD, temp, air flow, frequency, etc.). Condition Min 6 200 0.25 – – – Type – – – – – – Max 200 400 3.5 100 200 200 Unit MHz MHz MHz ps ps ps tSKEW2 tSKEW3 tSKEW4 tSKEW5 tPART – – – – – – – – – – 500 500 500 650 750 ps ps ps ps ps tPD0 tODCV tPWH tPWL tR/tF tLOCK tCCJ Ref to FB Propagation Delay[14] Output Duty Cycle Output High Time Deviation from 50% Output Low Time Deviation from 50% Output Rise/Fall Time PLL Lock Time[15,16] Cycle-Cycle Jitter Divide by one output frequency, FS = L, FB = divide by any. Divide by one output frequency, FS = M/H, FB = divide by any. Fout < 100 MHz, Measured at VDD/2. Fout > 100 MHz, Measured at VDD/2. Measured at 2.0V for VDD = 3.3V and at 1.7V for VDD = 2.5V. Measured at 0.8V for VDD = 3.3V and at 0.7V for VDD = 2.5V. Measured at 0.8V–2.0V for VDD = 3.3V and 0.7V–1.7V for VDD = 2.5V. –250 48 45 – – 0.15 – – – – – – – – – – 45 55 +250 52 55 1.5 2.0 1.5 0.5 100 150 ps % ns ns ns ms ps ps Notes 11. These Inputs are normally wired to VDD, GND or unconnected. Internal termination resistors bias unconnected inputs to VDD/2. 12. IF PD#/DIV is in HIGH level (R-reference divider = 1). Reference Input Frequency = FREF. IF PD#/DIV is in MID level (R-reference divider = 2). Reference Input Frequency = FREFx2. 13. Test Load = 20 pF, terminated to VCC/2. All outputs are equally loaded. 14. tPD is measured at 1.5V for VDD = 3.3V and at 1.25V for VDD = 2.5V with REF rise/fall times of 0.5 ns between 0.8V–2.0V. 15. tLOCK is the time that is required before outputs synchronize to REF. This specification is valid with stable power supplies which are within normal operating limits. 16. Lock detector circuit may be unreliable for input frequencies lower than 4 MHz, or for input signals which contain significant jitter. Document #: 38-07337 Rev. *D Page 8 of 13 [+] Feedback RoboClock®, CY7B995 AC Timing Definitions Figure 2. Timing Definition tREF tPWH tPWL REF tPD t0DCV t0DCV FB tCCJ1-12 Q tSKEWPR tSKEW0,1 tSKEWPR tSKEW0,1 OTHER Q tSKEW1 tSKEW1 INVERTED Q tSKEW3 tSKEW3 tSKEW3 DIVIDE BY 2 OUTPUT tSKEW1,3,4 tSKEW1,3,4 DIVIDE BY 4 OUTPUT With PE HIGH (LOW), the REF rising (falling) edges are aligned to the FB rising (falling) edges. Also, when PE is HIGH (LOW), all divided outputs’ rising (falling) edges are aligned to the rising (falling) edges of the undivided, non-inverted outputs. Regardless of PE setting, divide-by-4 outputs’, rising edges align to the divide-by-2 outputs’ rising edges. In cases where a non-divided output is connected to the FB input pin, the divided output rising edges can be either 0 or 180 degrees phase aligned to the REF input rising edges (as set randomly at power-up). If the divided outputs are required as rising-edge (falling-edge) aligned to the REF input’s rising (falling) edge, set the PE pin HIGH (LOW) and connect the lowest frequency divided output to the FB input pin. This setup provides a consistent input-output and output-output phase relationship. Document #: 38-07337 Rev. *D Page 9 of 13 [+] Feedback RoboClock®, CY7B995 AC Test Loads and Waveforms Figure 3. For Lock Output and all other Outputs VDDQ O u tp u t 20pF O u tp u t 150Ω 150Ω 20pF F o r L o ck O u tp u t F o r A ll O th e r O u tp u ts Figure 4. 3.3V LVTTL and 2.5V LVTTL Output Waveforms tORISE tOFALL tORISE tOFALL 2.0V VTH =1.5V tPWL 0.8V tPWH 1.7V VTH =1.25V 0.7V tPWH tPWL 3.3V LVTTL OUTPUT WAVEFORM 2.5V LVTTL OUTPUT WAVEFORM Figure 5. 3.3V LVTTL and 2.5V LVTTL Input Test Waveforms ≤ 1 ns 3.0V 2.0V VTH =1.5V 0.8V 0V ≤ 1ns 2.5V 1.7V VTH =1.25V 0.7V 0V ≤ 1ns ≤ 1ns 3.3V LVTTL INPUT TEST WAVEFORM 2.5V LVTTL INPUT TEST WAVEFORM Document #: 38-07337 Rev. *D Page 10 of 13 [+] Feedback RoboClock®, CY7B995 Ordering Information Part Number CY7B995AC CY7B995ACT CY7B995AI CY7B995AIT Pb-free CY7B995AXC CY7B995AXCT CY7B995AXI CY7B995AXIT 44 TQFP 44 TQFP – Tape and Reel 44 TQFP 44 TQFP – Tape and Reel Commercial, 0° to 70°C Commercial, 0° to 70°C Industrial, –40° to 85°C Industrial, –40° to 85°C Active Active Active Active Package Type 44 TQFP 44 TQFP – Tape and Reel 44 TQFP 44 TQFP – Tape and Reel Product Flow Commercial, 0° to 70°C Commercial, 0° to 70°C Industrial, –40° to 85°C Industrial, –40° to 85°C Status Obsolete Obsolete Not for new design Obsolete Document #: 38-07337 Rev. *D Page 11 of 13 [+] Feedback RoboClock®, CY7B995 Package Drawing and Dimension Figure 6. 44-Pb Thin Plastic Quad Flat Pack (10 x 10 x 1.0 mm) A44SB 51-85155*A Document #: 38-07337 Rev. *D Page 12 of 13 [+] Feedback RoboClock®, CY7B995 Document History Page Document Title: CY7B995 Roboclock® 2.5/3.3V 200-MHz High-speed Multi-phase PLL Clock Buffer Document Number: 38-07337 REV. ** *A ECN No. 122626 205743 Issue Date 01/10/03 See ECN Orig. of Change RGL RGL New Data Sheet Changed Pin 5 from VDD to VDDQ4, Pin 16 from VDD to VDDQ3 and Pin 29 from VDD to VDDQ1 Added pin 1 indicator in the Pin Configuration Drawing Added description on the AC Timing Waveforms Added typical value for cycle-to-cycle jitter Added Lead-free devices Description of Change *B *C *D 362760 389237 1562063 See ECN See ECN See ECN RGL RGL PYG/AESA Added Status column to Ordering Information table © Cypress Semiconductor Corporation, 2003-2007. 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Document #: 38-07337 Rev. *D Revised September 27, 2007 Page 13 of 13 RoboClock is a registered trademark of Cypress Semiconductor. All product and company names mentioned in this document are the trademarks of their respective holders. [+] Feedback