CY2545, CY2547 Quad PLL Programmable Spread Spectrum Clock Generator with Serial I2C Interface Features ■ Four fully integrated phase locked loops (PLLs) ■ Input frequency range ❐ External crystal: 8 to 48 MHz ❐ External reference: 8 to 166 MHz clock ■ ■ Up to eight clock outputs with programmable drive strength ■ Glitch-free outputs while frequency switching ■ 24-pin QFN package ■ Commercial and industrial temperature ranges Benefits Wide operating output frequency range ❐ 3 to 166 MHz ■ Multiple high performance PLLs allow synthesis of unrelated frequencies ■ Nonvolatile programming for personalization of PLL frequencies, spread spectrum characteristics, drive strength, crystal load capacitance, and output frequencies ■ Application specific programmable EMI reduction using Spread Spectrum for clocks ■ Programmable PLLs for system frequency margin tests ■ Meets critical timing requirements in complex system designs ■ Suitability for PC, consumer, portable, and networking applications 2 ■ Serial programmable over 2-wire I C interface ■ Programmable spread spectrum with center and down spread option and Lexmark and Linear modulation profiles ■ VDD supply voltage options: ❐ 2.5 V, 3.0 V, and 3.3 V for CY2545 ❐ 1.8 V for CY2547 ■ Selectable output clock voltages independent of VDD supply: ❐ 2.5 V, 3.0 V, and 3.3 V for CY2545 ❐ 1.8 V for CY2547 ■ Power-down, output enable, or frequency select features ■ Low jitter, high accuracy outputs ■ Capable of zero PPM frequency synthesis error ■ Ability to synthesize nonstandard frequencies with Fractional-N capability ■ Uninterrupted system operation during clock frequency switch ■ Application compatibility in standard and low power systems Logic Block Diagram CLKIN/RST Crossbar XIN/ EXCLKIN XOUT CLK1 Switch Output OSC Bank 1 CLK2 PLL1 Dividers CLK3 and Drive PLL2 MUX and Control Logic FS Bank 2 CLK5 Strength Control CLK6 Bank 3 PLL3 (SS) CLK4 CLK7 CLK8 SCL SDA PLL4 (SS) I2C PD#/OE SSON Cypress Semiconductor Corporation Document #: 001-13196 Rev. *C • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600 Revised July 5, 2011 [+] Feedback CY2545, CY2547 Contents Pinouts .............................................................................. 3 General Description ......................................................... 5 Four Configurable PLLs .............................................. 5 I2C Programming ........................................................ 5 Input Reference Clocks ............................................... 5 Multiple Power Supplies .............................................. 5 Output Bank Settings .................................................. 5 Output Source Selection ............................................. 5 Spread Spectrum Control ............................................ 5 Frequency Select ........................................................ 5 Glitch-Free Frequency Switch ..................................... 5 Device Reset Function ................................................ 5 PD#/OE Mode ............................................................. 6 Keep Alive Mode ......................................................... 6 Output Drive Strength .................................................. 6 Generic Configuration and Custom Frequency ........... 6 Serial I2C Programming Interface Protocol and Timing ......................................................... 6 Device Address ........................................................... 6 Data Valid .................................................................... 6 Data Frame ................................................................. 6 Acknowledge Pulse ..................................................... 6 Write Operations ............................................................... 7 Writing Individual Bytes ............................................... 7 Writing Multiple Bytes .................................................. 7 Document #: 001-13196 Rev. *C Read Operations ............................................................... 7 Current Address Read ................................................. 7 Random Read ............................................................. 7 Sequential Read .......................................................... 7 Serial I2C Programming Interface Timing ...................... 9 Serial I2C Programming Interface Timing Specifications ...................................................... 9 Absolute Maximum Conditions ..................................... 10 Recommended Operating Conditions .......................... 10 DC Electrical Specifications .......................................... 11 Recommended Crystal Specification for SMD Package ............................................................ 12 Test and Measurement Setup ........................................ 13 Voltage and Timing Definitions ..................................... 13 Ordering Information ...................................................... 14 Package Drawing and Dimensions ............................... 15 Reference Information ................................................... 16 Acronyms ................................................................. 16 Document Conventions ............................................. 16 Document History Page ................................................. 17 Sales, Solutions, and Legal Information ...................... 17 Worldwide Sales and Design Support ....................... 17 Products .................................................................... 17 PSoC Solutions ......................................................... 17 Page 2 of 17 [+] Feedback CY2545, CY2547 Pinouts XIN/ EXCLKIN XOUT VDD CLKIN/RST CLK8 GND Figure 1. Pin Diagram – CY2545 24-pin QFN 24 23 22 21 20 19 GND 1 18 GND CLK1 2 17 CLK7 VDD_CLK_B1 3 16 VDD_CLK_B3 PD#OE 4 15 CLK6/SSON DNU 5 14 VDD_CLK_B2 6 13 CLK5 9 10 SDA CLK3/FS 11 12 GND 8 CLK4 7 SCL 24LD QFN GND CLK2 CY2545 Table 1. Pin Definition – CY2545 24-pin QFN (VDD = 2.5 V, 3.0 V or 3.3 V Supply) Pin Number Name I/O Description 1 GND Power Power supply ground 2 CLK1 Output Programmable clock output. Output voltage depends on Bank1 voltage 3 VDD_CLK_B1 Power Power supply for Bank1 (CLK1, CLK2) output: 2.5 V/3.0 V/3.3 V 4 PD#/OE Input Multifunction programmable pin: Output enable or Power-down mode 5 DNU DNU Do not use this pin 6 CLK2 Output Programmable clock output. Output voltage depends on Bank1 voltage 7 GND Power Power supply ground 8 SCL Input Serial data clock 9 SDA Input/Output Serial data input/output 10 CLK3/FS Output/Input Multifunction programmable pin: Programmable clock output or frequency select input pin. Output voltage of CLK3 depends on Bank2 voltage 11 CLK4 Output Programmable clock output. Output voltage depends on Bank2 voltage 12 GND Power Power supply ground 13 CLK5 Output Programmable clock output. Output voltage depends on Bank2 voltage 14 VDD_CLK_B2 Power Power supply for Bank2 (CLK3, CLK4, CLK5) output: 2.5 V/3.0 V/3.3 V 15 CLK6/SSON Output/Input Multifunction programmable pin: Programmable clock output or spread spectrum ON/OFF control input pin. Output voltage of CLK6 depends on Bank3 voltage 16 VDD_CLK_B3 Power Power supply for Bank3 (CLK6, CLK7, CLK8) output: 2.5 V/3.0 V/3.3 V 17 CLK7 Output Programmable clock output. Output voltage depends on Bank3 voltage 18 GND Power Power supply ground 19 GND Power Power supply ground 20 CLK8 Output Programmable clock output. Output voltage depends on Bank3 voltage 21 CLKIN/RST Input/Input Multifunction programmable pin. High true reset input or 2.5 V/3.0 V/3.3 V external reference clock input. The signal level of CLKIN input must track VDD power supply on pin 22. 22 VDD Power Power supply for core and inputs: 2.5 V/3.0 V/3.3 V Document #: 001-13196 Rev. *C Page 3 of 17 [+] Feedback CY2545, CY2547 Table 1. Pin Definition – CY2545 24-pin QFN (VDD = 2.5 V, 3.0 V or 3.3 V Supply) (continued) Pin Number Name I/O Description 23 XOUT Output Crystal output 24 XIN/EXCLKIN Input Crystal input or 1.8 V external clock input GND 22 CLK8 23 CLKIN/RST XOUT 24 VDD XIN/ EXCLKIN Figure 2. Pin Diagram – CY2547 24-pin QFN 21 20 19 GND 1 18 GND CLK1 2 17 CLK7 VDD_CLK_B1 3 16 VDD_CLK_B3 PD#OE 4 15 CLK6/SSON VDD 5 14 VDD_CLK_B2 CLK2 6 13 CLK5 CY2547 SCL SDA 10 11 12 GND 9 CLK4 8 CLK3/FS 7 GND 24LD QFN Table 2. Pin Definition – CY2547 24-pin QFN (VDD = 1.8 V Supply) Pin Number Name I/O Description 1 GND Power Power supply ground 2 CLK1 Output Programmable clock output. Output voltage depends on Bank1 voltage 3 VDD_CLK_B1 Power Power supply for Bank1 (CLK1, CLK2) output: 1.8 V 4 PD#/OE Input Multifunction programmable pin: Output enable or Power-down mode 5 VDD Power Power supply for core and inputs: 1.8 V 6 CLK2 Output Programmable output clock. Output voltage depends on Bank1 voltage 7 GND Power Power supply ground 8 SCL Input Serial data clock 9 SDA Input/Output Serial data input 10 CLK3/FS Output/Input Multifunction programmable pin: Programmable clock output or frequency select input pin. Output voltage of CLK3 depends on VDD_CLK_B2 voltage 11 CLK4 Output Programmable output clock. Output voltage depends on Bank2 voltage 12 GND Power Power supply ground 13 CLK5 Output Programmable clock output. Output voltage depends on Bank2 voltage 14 VDD_CLK_B2 Power Power supply for Bank2 (CLK3, CLK4, CLK5) output: 1.8 V 15 CLK6/SSON Output/Input Multifunction programmable pin: Programmable clock output or spread spectrum ON/OFF control input pin. Output voltage of CLK6 depends on VDD_CLK_B3 voltage 16 VDD_CLK_B3 Power Power supply for Bank3 (CLK6, CLK7, CLK8) output: 1.8 V 17 CLK7 Output Programmable clock output. Output voltage depends on Bank3 voltage 18 GND Power Power supply ground 19 GND Power Power supply ground 20 CLK8 Output Programmable clock output. Output voltage depends on Bank3 voltage Document #: 001-13196 Rev. *C Page 4 of 17 [+] Feedback CY2545, CY2547 Table 2. Pin Definition – CY2547 24-pin QFN (VDD = 1.8 V Supply) (continued) Pin Number Name I/O Description 21 CLKIN/RST Input/Input Multifunction programmable pin: High true reset input or 1.8 V external low voltage reference clock input 22 VDD Power Power supply for core and inputs: 1.8 V 23 XOUT Output Crystal output 24 XIN/EXCLKIN Input Crystal input or 1.8 V external clock input General Description Four Configurable PLLs Output Source Selection The CY2545 and CY2547 have four I2C programmable PLLs available to generate output frequencies ranging from 3 to 166 MHz. The advantage of having four PLLs is that a single device generates up to four independent frequencies from a single crystal. Two sets of frequencies for each PLL can be programmed. This enables in system frequency switching using multifunction frequency select pin, FS. These devices have eight clock outputs (CLK1 - 8). There are six available clock sources for these outputs. These clock sources are: XIN/EXCLKIN, CLKIN, PLL1, PLL2, PLL3, or PLL4. Output clock source selection is done using four out of six crossbar switch. Thus, any one of these six available clock sources can be arbitrarily selected for the clock outputs. This gives user a flexibility to have up to four independent clock outputs. I2C Programming Spread Spectrum Control The CY2545 and CY2547 have a serial I2C interface that programs the configuration memory array to synthesize output frequencies by programmable output divider, spread characteristics, drive strength, and crystal load capacitance. I2C can also be used for in system control of these programmable features. Two of the four PLLs (PLL3 and PLL4) have spread spectrum capability for EMI reduction in the system. The device uses a Cypress proprietary PLL and Spread Spectrum Clock (SSC) technology to synthesize and modulate the frequency of the PLL. The spread spectrum feature can be turned on or off using a multifunction control pin (CLK7/SSON). It can be programmed to either center spread range from ±0.125% to ±2.50% or down spread range from –0.25% to –5.0% with Lexmark or Linear profile. Input Reference Clocks The input to the CY2545 and CY2547 is either a crystal or a clock signal. The input frequency range for crystals is 8 MHz to 48 MHz. There is provision for two reference clock inputs, CLKIN and EXCLKIN with frequency range of 8 MHz to 166 MHz. For both devices, when CLKIN signal at pin 21 is used as a reference input, a valid signal at EXCLKIN (as specified in the AC and DC Electrical Specification table), must be present for the devices to operate properly. Multiple Power Supplies The CY2545 and CY2547 are designed to operate at internal core supply voltage of 1.8 V. In the case of the high voltage part (CY2545), an internal regulator is used to generate 1.8 V from the 2.5 V/3.0 V/3.3 V VDD supply voltage at pin 22. For the low voltage part (CY2547), this internal regulator is bypassed and 1.8 V at VDD pin 22 is directly used. Frequency Select The device can store two different PLL frequency configurations, output source selection and output divider values for all eight outputs in its nonvolatile memory location. There is a multifunction programmable pin, CLK3/FS which, if programmed as frequency select input, can be used to select between these two arbitrarily programmed settings. Glitch-Free Frequency Switch When the frequency select pin (FS) is used to switch frequency, the outputs are glitch-free provided frequency is switched using output dividers. This feature enables uninterrupted system operation while clock frequency is switched. Output Bank Settings Device Reset Function These devices have eight clock outputs grouped in three output driver banks. The Bank 1, Bank 2, and Bank 3 correspond to (CLK1, CLK2), (CLK3, CLK4, CLK5), and (CLK6, CLK7, CLK8), respectively. Separate power supplies are used for each of these banks and they can be any of 2.5 V, 3.0 V, or 3.3 V for CY2545 and 1.8 V for CY2547 giving user multiple choice of output clock voltage levels. There is a multifunction CLKIN/RST (pin 21) that can be programmed to use for the device reset function. There are two different programmable modes of operation for this device reset function. First one (called POR like reset), when used brings the device in the default register settings loosing all configuration changes made through the I2C interface. The second (called Clean Start), keeps the I2C programmed values while giving all outputs a simultaneous clean start from its low pull-down state. Document #: 001-13196 Rev. *C Page 5 of 17 [+] Feedback CY2545, CY2547 PD#/OE Mode PD#/OE (Pin 4) is programmable to operate as either power-down (PD#) or output enable (OE) mode. PD# is a low true input. If activated it shuts off the entire chip, resulting in minimum device power consumption. Setting this signal high brings the device into operational mode with default register settings. When this pin is programmed as output enable (OE), clock outputs are enabled or disabled using OE pin. Individual clock outputs can be programmed to be sensitive to this OE pin. Keep Alive Mode By activating the device in the keep alive mode, power-down mode is changed to power saving mode. This disables all PLLs and outputs, but preserves the contents of the volatile registers. Thus, any configuration changes made through the I2C interface are preserved. By deactivating the keep alive mode, I2C memory is not preserved during power-down, but power consumption is reduced relative to the keep alive mode. Output Drive Strength The DC drive strength of the individual clock output can be programmed for different values. Table 4 shows the typical rise and fall times for different drive strength settings. Table 3. Output Drive Strength Output Drive Strength Rise/Fall Time (ns) (Typical Value) Serial I2C Programming Interface Protocol and Timing To enhance the flexibility and function of the clock synthesizer, a two signal serial interface is provided. Through the Serial Data Interface, various device functions, such as individual clock output buffers, are individually enabled or disabled. The registers associated with the Serial Data Interface initialize to their default setting upon power-up and therefore, use of this interface is optional. Clock device register changes are normally made at system initialization, if any are required. The CY2545 and CY2547 use a 2-wire serial interface SDA and SCL that operates up to 400 kbits/s in read or write mode. The SDA and SCL timing and data transfer sequence is shown in Figure 3. The basic write serial format is: Start Bit; 7-bit Device Address (DA); R/W Bit; Slave Clock Acknowledge (ACK); 8-bit Memory Address (MA); ACK; 8-bit Data; ACK; 8-bit Data in MA+1 if desired; ACK; 8-bit Data in MA+2; ACK; etc. until STOP Bit. The basic serial format is illustrated in Figure 4. Device Address The device serial interface address is 69H. The device address is combined with a read/write bit as the LSB and is sent after each start bit. Data Valid Low 6.8 Data is valid when the clock is HIGH, and is only transitioned when the clock is LOW, as illustrated in Figure 5. Mid Low 3.4 Data Frame Mid High 2.0 High 1.0 A start and stop sequence indicates every new data frame, as illustrated in Figure 6. Generic Configuration and Custom Frequency There is a generic set of output frequencies available from the factory that can be used for the device evaluation purposes. The device, CY2545/CY2547 can be custom programmed to any desired frequencies and listed features. For customer specific programming and I2C programmable memory bitmap definitions, please contact your local Cypress Field Application Engineer (FAE) or sales representative. Start Sequence - The start frame is indicated by SDA going LOW when SCL is HIGH. Every time a start signal is supplied, the next 8-bit data must be the device address (seven bits) and a R/W bit, followed by register address (eight bits) and register data (eight bits). Stop Sequence - The stop frame is indicated by SDA going HIGH when SCL is HIGH. A stop frame frees the bus to go to another part on the same bus or to another random register address. Acknowledge Pulse During write mode the CY2545/CY2547 responds with an acknowledge pulse after every eight bits. Do this by pulling the SDA line LOW during the N × 9th clock cycle as illustrated in Figure 7 (N = the number of bytes transmitted). During read mode, the master generates the acknowledge pulse after reading the data packet. Document #: 001-13196 Rev. *C Page 6 of 17 [+] Feedback CY2545, CY2547 Write Operations Writing Individual Bytes A valid write operation must have a full 8-bit register address after the device address word from the master, which is followed by an acknowledge bit from the slave (ack = 0/LOW). The next eight bits must contain the data word intended for storage. After the data word is received, the slave responds with another acknowledge bit (ack = 0/LOW), and the master must end the write sequence with a STOP condition. read operation returns the value stored in location ‘n+1’. When the CY2545/CY2547 receive the slave address with the R/W bit set to a ‘1’, the CY2545/CY2547 issue an acknowledge and transmit the 8-bit word. The master device does not acknowledge the transfer, but generates a STOP condition, which causes the CY2545/CY2547 to stop transmission. Random Read To write multiple bytes at a time, the master does not end the write sequence with a STOP condition; instead, the master sends multiple contiguous bytes of data to be stored. After each byte, the slave responds with an acknowledge bit, the same as after the first byte, and accepts data until the STOP condition responds to the acknowledge bit. When receiving multiple bytes, the CY2545 and CY2547 internally increment the register address. Through random read operations, the master may access any memory location. To perform this type of read operation, first the word address must be set. This is done by sending the address to the CY2545/CY2547 as part of a write operation. After sending the word address, the master generates a START condition following the acknowledge. This terminates the write operation before any data is stored in the address, but not before the internal address pointer is set. Next, the master reissues the control byte with the R/W byte set to ‘1’. The CY2545/CY2547 then issue an acknowledge and transmit the 8-bit word. The master device does not acknowledge the transfer, but generates a STOP condition, which causes the CY2545/CY2547 to stop transmission. Read Operations Sequential Read Read operations are initiated the same way as write operations except that the R/W bit of the slave address is set to ‘1’ (HIGH). There are three basic read operations: current address read, random read, and sequential read. Sequential read operations follow the same process as random reads except that the master issues an acknowledge instead of a STOP condition after transmitting the first 8-bit data word. This action increments the internal address pointer, and subsequently output of the next 8-bit data word. By continuing to issue acknowledges instead of STOP conditions, the master serially reads the entire contents of the slave device memory. When the internal address pointer points to the FFH register, after the next increment, the pointer points to the 00H register. Writing Multiple Bytes Current Address Read The CY2545 and CY2547 have an onboard address counter that retains 1 more than the address of the last word access. If the last word written or read was word ‘n’, then a current address Document #: 001-13196 Rev. *C Page 7 of 17 [+] Feedback CY2545, CY2547 Figure 3. Data Transfer Sequence on the Serial Bus SCL SDA Address or Acknowledge Valid START Condition STOP Condition Data may be changed Figure 4. Data Frame Architecture SDA Write Multiple Contiguous Registers 1 Bit 1 Bit Slave R/W = 0 ACK 7-bit Device Address 1 Bit Slave ACK 8-bit Register Address (XXH) 1 Bit Slave ACK 8-bit Register Data (XXH) 1 Bit Slave ACK 8-bit Register Data (XXH+1) 1 Bit Slave ACK 8-bit Register Data (XXH+2) 1 Bit Slave ACK 8-bit Register Data (FFH) 1 Bit Slave ACK 8-bit Register Data (00H) Stop Signal Start Signal SDA Read Current Address Read Start Signal SDA Read Multiple Contiguous Registers 1 Bit Slave ACK 1 Bit 1 Bit Slave ACK R/W = 1 7-bit Device Address 1 Bit Slave ACK 1 Bit Master ACK 8-bit Register Data Stop Signal 1 Bit 1 Bit Slave ACK R/W = 0 7-bit Device Address 1 Bit Slave ACK 8-bit Register Address (XXH) 1 Bit Master ACK 7-bit Device Address +R/W=1 1 Bit Master ACK 8-bit Register Data (XXH) 1 Bit Master ACK 8-bit Register Data (XXH+1) 8-bit Register Data (FFH) 1 Bit Master ACK 1 Bit Master ACK 1 Bit Master ACK 8-bit Register Data (00H) Stop Signal Start Signal Repeated Start bit Figure 5. Data Valid and Data Transition Periods Data Valid Transition to next Bit SDA tDH tSU CLKHIGH VIH SCL Document #: 001-13196 Rev. *C VIL CLKLOW Page 8 of 17 [+] Feedback CY2545, CY2547 Serial I2C Programming Interface Timing Figure 6. .Start and Stop Frame SDA Transition to next Bit START SCL STOP Figure 7. Frame Format (Device Address, R/W, Register Address, Register Data) SDA + START SCL DA6 DA5 DA0 + R/W ACK RA7 RA6 RA1 + RA0 ACK + + D7 D6 D1 D0 ACK STOP + Serial I2C Programming Interface Timing Specifications Parameter fSCL Description Frequency of SCL Min Max Unit – 400 kHz Start mode time from SDA LOW to SCL LOW 0.6 – μs CLKLOW SCL LOW period 1.3 – μs CLKHIGH SCL HIGH period 0.6 – μs tSU Data transition to SCL HIGH 250 – ns tDH Data hold (SCL LOW to data transition) 0 – ns Rise time of SCL and SDA – 300 ns Fall time of SCL and SDA – 300 ns Stop mode time from SCL HIGH to SDA HIGH 0.6 – μs Stop mode to start mode 1.3 – μs Document #: 001-13196 Rev. *C Page 9 of 17 [+] Feedback CY2545, CY2547 Absolute Maximum Conditions Min Max Unit VDD Parameter Supply voltage for CY2545 Description Condition –0.5 4.5 V VDD Supply voltage for CY2547 –0.5 2.6 V VDD_CLK_BX Output bank supply voltage –0.5 4.5 V VIN Input voltage for CY2545 Relative to VSS –0.5 VDD + 0.5 V VIN Input voltage for CY2547 Relative to VSS –0.5 2.2 V +150 °C TS Temperature and storage Nonfunctional –65 ESDHBM ESD protection (human body model) JEDEC EIA/JESD22-A114-E 2000 UL-94 Flammability rating V-0 at1/8 in. MSL Moisture sensitivity level V 10 ppm 3 Recommended Operating Conditions Min Typ Max Unit VDD Parameter VDD operating voltage for CY2545 Description 2.25 – 3.60 V VDD VDD operating voltage for CY2547 1.65 1.8 1.95 V VDD_CLK_BX Output driver voltage for bank 1, 2 and 3 1.43 – 3.60 V TAC Commercial ambient temperature TAI Industrial ambient temperature CLOAD Maximum load capacitance tPU Power-up time for all VDD to reach minimum specified voltage (power ramps must be monotonic) Document #: 001-13196 Rev. *C 0 – +70 °C –40 – +85 °C – – 15 pF 0.05 – 500 ms Page 10 of 17 [+] Feedback CY2545, CY2547 DC Electrical Specifications Parameter VOL Description Output low voltage Conditions IOL = 2 mA, drive strength = [00] Min Typ Max Unit – – 0.4 V VDD_CLK_BX – 0.4 – – V IOL = 3 mA, drive strength = [01] IOL = 7 mA, drive strength = [10] IOL = 12 mA, drive strength = [11] VOH Output high voltage IOH = –2 mA, drive strength = [00] IOH = –3 mA, drive strength = [01] IOH = –7 mA, drive strength = [10] IOH = –12 mA, drive strength = [11] VOLSD Output low voltage, SDA – – 0.4 V VIL1 Input low voltage of PD#/OE, RST, FS, and SSON – – 0.2 × VDD V VIL2 Input low voltage of CLKIN for CY2545 – – 0.1 × VDD V VIL3 Input low voltage of EXCLKIN for CY2545 – – 0.18 V VIL4 Input low voltage of CLKIN, EXCLKIN for CY2547 – – 0.1 × VDD V VIH1 Input high voltage of PD#/OE, RST, FS, and SSON 0.8 × VDD – – V VIH2 Input high voltage of CLKIN for CY2545 0.9 × VDD – – V VIH3 Input high voltage of EXCLKIN for CY2545 1.62 – 2.2 V VIH4 Input high voltage of CLKIN, EXCLKIN for CY2547 0.9 × VDD – – V IILPD Input low current of RST and PD#/OE VIL = 0 V – – 10 µA IIHPD Input high current of RST and PD#/OE VIH = VDD – – 10 µA IILSR Input low current of SSON and FS VIL = 0 V (Internal pull-down = 160 k typ) – – 10 µA IIHSR 14 – 36 µA RDN Input high current of SSON and FS VIH = VDD (Internal pull-down = 160 k typ) Pull-down resistor of (CLK1-CLK8) when off, CLK6/SSON and CLK3/FS 100 160 250 kΩ IDD[1, 2] Supply current for CY2547 PD# = high, no load – 20 – mA Supply current for CY2545 PD# = high, no load – 22 – mA [1] IOL = 4 mA I2C IDDS Standby current PD# = low, no load, with keep alive mode circuit not in – 3 – µA IPD[1] Power-down current PD# = low, no load, with I2C circuit in keep alive mode – – 1 mA CIN[1] Input capacitance SSON, RST, PD#/OE or FS inputs – 7 pF Notes 1. Guaranteed by design but not 100% tested. 2. Configuration dependent. Document #: 001-13196 Rev. *C Page 11 of 17 [+] Feedback CY2545, CY2547 AC Electrical Specifications Parameter Description FIN (crystal) Crystal frequency, XIN FIN (clock) Input clock frequency Conditions Min Typ Max Unit 8 – 48 MHz Clock inputs CLKIN or EXCLKIN 8 – 166 MHz FCLK Output clock frequency 3 – 166 MHz DC1 Output duty cycle, all clocks except ref out Duty cycle is defined in Figure 9; t1/t2, measured 50% of VDD 45 50 55 % DC2 Ref out clock duty cycle Ref In Min 45%, Max 55% 40 – 60 % [3] Output rise/fall time Measured from 20% to 80% of VDD_CLK_BX, as shown in Figure 10, CLOAD = 15 pF, Drive strength [00] – 6.8 – ns TRF2[3] Output rise/fall time Measured from 20% to 80% of VDD_CLK_BX, as shown in Figure 10, CLOAD = 15 pF, Drive strength [01] – 3.4 – ns TRF3[3] Output rise/fall time Measured from 20% to 80% of VDD_CLK_BX, as shown in Figure 10, CLOAD = 15 pF, Drive strength [10] – 2.0 – ns TRF4[3] Output rise/fall time Measured from 20% to 80% of VDD_CLK_BX, as shown in Figure 10, CLOAD = 15 pF, Drive strength [11] – 1.0 – ns TCCJ[3, 4] Cycle-to-cycle jitter max (Pk-Pk) Configuration dependent. See Table 4 – 150 – ps PLL lock time Measured from 90% of the applied power supply level – 1 3 ms TRF1 [3] TLOCK Table 4. Configuration Example for C-C Jitter Ref. Freq. (MHz) CLK1 Output Freq. (MHz) C-C Jitter Typ (ps) 14.3181 8.0 19.2 74.25 CLK2 Output CLK3 Output Freq. (MHz) C-C Jitter Typ (ps) Freq. (MHz) 134 166 103 99 166 94 CLK4 Output C-C Jitter Typ (ps) Freq. (MHz) 48 92 74.25 81 8 91 27 110 CLK5 Output C-C Jitter Typ (ps) 27 48 67 27 109 166 103 74.25 97 48 48 93 27 123 166 137 166 138 Freq. (MHz) C-C Jitter Typ (ps) Not used 48 75 Not used 8 103 Recommended Crystal Specification for SMD Package Parameter Fmin Description Minimum frequency Range 1 8 Range 2 Range 3 14 Unit 28 MHz Fmax Maximum frequency 14 28 48 MHz R1 Motional resistance (ESR) 135 50 30 Ω C0 Shunt capacitance 4 4 2 pF CL Parallel load capacitance 18 14 12 pF DL(max) Maximum crystal drive level 300 300 300 µW Recommended Crystal Specification for Thru-Hole Package Parameter Description Range 1 Range 2 Range 3 Unit Fmin Minimum frequency 8 14 24 MHz Fmax Maximum frequency 14 24 32 MHz R1 Motional resistance (ESR) 90 50 30 Ω C0 Shunt capacitance 7 7 7 pF CL Parallel load capacitance DL(max) Maximum crystal drive level 18 12 12 pF 1000 1000 1000 µW Notes 3. Guaranteed by design but not 100% tested. 4. Configuration dependent. Document #: 001-13196 Rev. *C Page 12 of 17 [+] Feedback CY2545, CY2547 Test and Measurement Setup Figure 8. Test and Measurement Setup V DD 0.1 μF Outputs C LOAD DUT GND Voltage and Timing Definitions Figure 9. Duty Cycle Definition t1 t2 VDD_CLK_BX 50% of V Clock Output DD_CLK_BX 0V Figure 10. Rise Time = TRF, Fall Time = TRF TRF TRF V DD_CLK_BX 80% of V Clock Output Document #: 001-13196 Rev. *C 20% of V DD_CLK_BX DD_CLK_BX 0V Page 13 of 17 [+] Feedback CY2545, CY2547 Ordering Information All product offerings are factory programmed customer specific devices with customized part numbers. The Possible Configurations table shows the available device types, but not complete part numbers. Contact your local Cypress FAE of Sales Representative for more information. Possible Configurations Part Number[5] Type VDD(V) Production Flow Pb-free CY2545Cxxx 24-pin QFN Supply voltage: 2.5 V, 3.0 V or 3.3 V Commercial, 0 °C to 70 °C CY2545CxxxT 24-pin QFN tape and reel Supply voltage: 2.5 V, 3.0 V or 3.3 V Commercial, 0 °C to 70 °C CY2547Cxxx 24-pin QFN Supply voltage: 1.8 V Commercial, 0 °C to 70 °C CY2547CxxxT 24-pin QFN tape and reel Supply voltage: 1.8 V Commercial, 0 °C to 70 °C CY2545Ixxx 24-pin QFN Industrial, –40 °C to 85 °C Supply voltage: 2.5 V, 3.0 V or 3.3 V CY2545IxxxT 24-pin QFN tape and reel Supply voltage: 2.5 V, 3.0 V or 3.3 V Industrial, –40 °C to 85 °C CY2547Ixxx 24-pin QFN Supply voltage: 1.8 V Industrial, –40 °C to 85 °C CY2547IxxxT 24-pin QFN tape and reel Supply voltage: 1.8 V Industrial, –40 °C to 85 °C Ordering Code Definitions CY 2545/7 C xxx T Tape and reel Three digit numeric custom configuration code Temperature range: C = Commercial, I = Industrial Base part number Company Code: CY = Cypress Note 5. xxx indicates Factory Programmable and are factory programmed configurations. For more details, contact your local Cypress FAE or Cypress Sales Representative. Document #: 001-13196 Rev. *C Page 14 of 17 [+] Feedback CY2545, CY2547 Package Drawing and Dimensions Figure 11. 24-pin QFN 4 × 4 mm (subcon punch type package with 2.49 × 2.49 EPAD) LF24A/LY24A 51-85203 *B Document #: 001-13196 Rev. *C Page 15 of 17 [+] Feedback CY2545, CY2547 Reference Information Acronyms Document Conventions Table 5. Acronyms Used in this Document Units of Measure Acronym PLL Description Table 6. Units of Measure Symbol phase-locked loop Unit of Measure I C inter integrated circuit °C degree Celsius QFN quad flat no leads kHz kilohertz JEDEC EIA Joint Electron Device Engineering Council Electronic Industries Alliance MHz megahertz μA microampere ESD electrostatic discharge μs microsecond ESR equivalent series resistance μW microwatt mA milliampere ms millisecond ns nanosecond W ohm 2 Document #: 001-13196 Rev. *C ppm parts per million % percent pF picofarad ps picosecond V volt W watt Page 16 of 17 [+] Feedback CY2545, CY2547 Document History Page Document Title: CY2545 CY2547 Quad PLL Programmable Spread Spectrum Clock Generator with Serial I2C Interface Document Number: 001-13196 Revision ECN Orig. of Change Submission Date Description of Change ** 870780 RGL/AESA See ECN New Datasheet *A 1504843 RGL/AESA See ECN Changed I2C Tsu specification from 100 ns to 250 ns Changed ESD spec from MIL-STD to JEDEC Combined VDD operating condition spec for CY2545 to a single VDD spec Changed name from VDD_CORE to VDD *B 2899681 CXQ 03/26/2010 Updated Ordering Information Updated Package Diagram *C 3302754 CXQ 07/05/2011 Updated template and style to meet current Cypress standards. Included table of contents. Added ordering code definitions, acronyms and units of measure. 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 PSoC Touch Sensing USB Controllers Wireless/RF cypress.com/go/memory cypress.com/go/image cypress.com/go/psoc cypress.com/go/touch cypress.com/go/USB cypress.com/go/wireless © Cypress Semiconductor Corporation, 2007-2011. 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 #: 001-13196 Rev. *C Revised July 5, 2011 Page 17 of 17 All products and company names mentioned in this document may be the trademarks of their respective holders. [+] Feedback