ZL30110 Telecom Rate Conversion DPLL Data Sheet Features November 2006 • Synchronizes to 8 kHz, 2.048 MHz, 8.192 MHz or 16.384 MHz • Provides a range of output clocks: • Ordering Information ZL30110LDE ZL30110LDE1 32 Pin QFN 32 Pin QFN* Tubes Bake & Dry Pack Tubes Bake & Dry Pack *Pb Free Matte Tin 65.536 MHz TDM clock locked to the input reference -40°C to +85°C • General purpose 25 MHz fan-out to 6 outputs locked to the external crystal or oscillator • General purpose 125 MHz and 66 MHz or 100 MHz locked to the external crystal or oscillator • Clock rate conversion PLL for Telecommunication Equipment • Small/Medium Enterprise Router / Gateway • Provides DPLL lock and reference fail indication • Broadband access (xPON/xDSL) CPE gateway • Automatic free run mode on reference fail • DPLL bandwidth of 922 Hz for all rates of input reference and 58 Hz for an 8 kHz input reference • Less than 5 psecrms on 25 MHz outputs, and less than 0.6 nspp intrinsic jitter on the all other outputs • Minimal input to output and output to output skew • 25 MHz external master clock source: clock oscillator or crystal • Simple hardware control interface Applications Description The ZL30110 clock rate conversion digital phaselocked loop (DPLL) provides accurate and reliable frequency conversion. The ZL30110 generates a range of clocks that are either locked to the input reference or locked to the external crystal or oscillator. In the locked mode, the reference input is continuously monitored for a failure condition. In the event of a failure, the DPLL continues to provide a stable free running clock ensuring system reliability. REF_FAIL REF LOCK Frequency Synthesizer DPLL Reference Monitor RST State Machine C65o Select MUX OUT_SEL OSCi OSCo Master Clock APLL C100/66o APLL C125o 6 X C25o Figure 1 - Functional Block Diagram 1 Zarlink Semiconductor Inc. Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc. Copyright 2006, Zarlink Semiconductor Inc. All Rights Reserved. ZL30110 1.0 Physical Description 1.1 Pin Connections Data Sheet C25co C25do C25eo AVDD C25fo C65o AVDD AVCORE 24 22 C25bo C25ao 20 18 16 ZL30110 26 C100/66o 14 GND REF 12 30 VDD OSCi GND (33- E-pad) GND IC VDD OUT_SEL 28 IC VDD C125o 10 32 OSCo RST 2 4 6 8 VCORE LOCK REF_FAIL GND GNDVCORE VCORE GND Figure 2 - Pin Connections (32 pin 5 mm X 5 mm QFN with E-pad) 2 Zarlink Semiconductor Inc. ZL30110 Data Sheet Table of Contents 1.0 Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1 Pin Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.0 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.1 Reference Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.2 Digital Phase Lock Loop (DPLL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.3 Frequency Synthesizers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.4 State Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.5 APLL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.6 Master Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.0 DPLL Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.1 Freerun Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.2 Normal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4.0 Measures of Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.1 Jitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.2 Jitter Generation (Intrinsic Jitter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.3 Jitter Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.4 Lock Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5.0 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.1 Power Supply Decoupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.2 Master Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.2.1 Clock Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.2.2 Crystal Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5.3 Power Up Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5.4 Reset Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6.0 Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 6.1 AC and DC Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 6.2 Performance Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3 Zarlink Semiconductor Inc. ZL30110 Data Sheet List of Figures Figure 1 - Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Figure 2 - Pin Connections (32 pin 5 mm X 5 mm QFN with E-pad) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Figure 3 - Reference Monitor Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 4 - DPLL Mode Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Figure 5 - Clock Oscillator Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Figure 6 - Power-Up Reset Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 7 - Timing Parameter Measurement Voltage Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Figure 8 - Input to Output Timing for Synchronous Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 9 - Asynchronous Clocks Input to Output Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4 Zarlink Semiconductor Inc. ZL30110 Data Sheet List of Tables Table 1 - Clock Oscillator Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Table 2 - Crystal Oscillator Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5 Zarlink Semiconductor Inc. ZL30110 1.2 Data Sheet Pin Description Pin # Name I/O Type Description Input Reference 28 REF I Reference (LVCMOS, Schmitt Trigger). This is the input reference source used for synchronization. One of four possible frequencies may be used: 8 kHz, 2.048 MHz, 8.192 MHz or 16.384 MHz. This pin is internally pulled down to GND. 11 OSCi I Oscillator Master Clock (Input). For crystal operation, a 25 MHz crystal is connected from this pin to OSCo. For clock oscillator operation, this pin must be connected to a clock source. 10 OSCo O Oscillator Master Clock (LVCMOS). For crystal operation, a 25 MHz crystal is connected from this pin to OSCi. This output is not suitable for driving other devices (see C25o output pin for support of such function). For clock oscillator operation, this pin must be left unconnected. Master Clock Control and Status 9 RST I Reset (LVCMOS, Schmitt Trigger). A logic low at this input resets the device. On power up, the RST pin must be held low for a minimum of 300 ns after the power supply pins have reached the minimum supply voltage. When the RST pin goes high, the device will transition into a Reset state for 3 ms. In the Reset state all outputs will be forced into high impedance. 13 OUT_SEL I Output Select (LVCMOS, Schmitt Trigger). This input pin selects the output clock frequency of the C100/66o, a logic low selects the 100 MHz output, while logic high selects the 66 MHz output clock. 3 REF_FAIL O Reference Failure Indicator (LVCMOS). A logic high at this pin indicates that the REF reference frequency is exhibiting abrupt phase or frequency change. 2 LOCK O Lock Indicator (LVCMOS). This output goes to a logic high when the PLL is frequency locked to a valid input reference. Output Clocks 19 C65o O Clock 65.536 MHz (LVCMOS). This output is used in general TDM applications. The falling edge of this clock is aligned with rising edge of the input reference (REF). 26 C25ao O Clock 25 MHz (LVCMOS). This is a buffered external oscillator clock, the phase and frequency accuracy of this output tracks that of the external crystal or oscillator. 25 C25bo O Clock 25 MHz (LVCMOS). This is a buffered external oscillator clock, the phase and frequency accuracy of this output tracks that of the external crystal or oscillator. 24 C25co O Clock 25 MHz (LVCMOS). This is a buffered external oscillator clock, the phase and frequency accuracy of this output tracks that of the external crystal or oscillator. 23 C25do O Clock 25 MHz (LVCMOS). This is a buffered external oscillator clock, the phase and frequency accuracy of this output tracks that of the external crystal or oscillator. 6 Zarlink Semiconductor Inc. ZL30110 Data Sheet Pin # Name I/O Type 22 C25eo O Clock 25 MHz (LVCMOS). This is a buffered external oscillator clock, the phase and frequency accuracy of this output tracks that of the external crystal or oscillator. 20 C25fo O Clock 25 MHz (LVCMOS). This is a buffered external oscillator clock, the phase and frequency accuracy of this output tracks that of the external crystal or oscillator. 15 C100/66o O Clock 100 MHz or 66 MHz (LVCMOS). This is 100 MHz or 66 MHz rate converted clocks off the 25 MHz fixed frequency external oscillator, the phase and frequency accuracy of this output tracks that of the external crystal or oscillator device. 16 C125o O Clock 125 MHz (LVCMOS). This is 125 MHz rate converted clock off the 25 MHz fixed frequency external oscillator, the phase and frequency accuracy of this output tracks that of the external crystal or oscillator device. Description Miscellaneous 29 IC Internal Connection. Connect to VDD. 32 IC Internal Connection. Connect to VDD. Power and Ground 12 VDD Positive Supply Voltage. +3.3 VDC nominal. 14 VDD Positive Supply Voltage. +3.3 VDC nominal. 30 VDD Positive Supply Voltage. +3.3 VDC nominal. 1 VCORE Positive Supply Voltage. +1.8 VDC nominal. 6 VCORE Positive Supply Voltage. +1.8 VDC nominal. 7 VCORE Positive Supply Voltage. +1.8 VDC nominal. 17 AVCORE Positive Analog Supply Voltage. +1.8 VDC nominal. 18 AVDD Positive Analog Supply Voltage. +3.3 VDC nominal. 21 AVDD Positive Analog Supply Voltage. +3.3 VDC nominal. 4 GND Ground. 0 V. 5 GND Ground. 0 V. 8 GND Ground. 0 V. 27 GND Ground. 0 V. 31 GND Ground. 0 V. 33 E-pad GND Internal Connection. Package E-pad, this pin is internally connected to device GND, it should be connected to GND. 7 Zarlink Semiconductor Inc. ZL30110 2.0 Functional Description 2.1 Reference Monitor Data Sheet The input reference is monitored by two reference monitor blocks. The block diagram of reference monitoring is shown in Figure 3. The reference frequency is detected and the clock is continuously monitored for two independent criteria that indicate abnormal behavior of the reference signal, for example; loss of clock or excessive level of frequency error. To ensure proper operation of the reference monitor circuit, the minimum input pulse width restriction of 15 nsec must be observed. • Reference Frequency Detector (RFD): This detector determines whether the frequency of the reference clock is 8 kHz, 2.048 MHz, 8.192 MHz or 16.384 MHz and provides this information to the various monitor circuits and the phase detector circuit of the DPLL. • Coarse Frequency Monitor (CFM): This circuit monitors the reference frequency over intervals of approximately 30 µs to quickly detect large frequency changes. • Single Cycle Monitor (SCM): This detector checks the period of a single clock cycle to detect large phase hits or the complete loss of the clock. Reference Frequency Detector REF_FAIL REF Coarse Frequency Monitor Mode select state machine OR DPLL in FreeRun Mode Single Cycle Monitor Figure 3 - Reference Monitor Circuit Exceeding the thresholds of any of the monitors forces the corresponding REF_FAIL pin to go high. The single cycle and coarse frequency failure flags force the DPLL into FreeRun mode. 8 Zarlink Semiconductor Inc. ZL30110 2.2 Data Sheet Digital Phase Lock Loop (DPLL) The DPLL of the ZL30110 consists of a phase detector, a loop filter and a digitally controlled oscillator. Phase Detector - the phase detector compares the input reference signal to the feedback signal and provides an error signal corresponding to the phase difference between the two. Loop Filter - the loop filter is similar to a first order low pass filter with a bandwidth of 922 Hz. For stability reasons, the loop filter bandwidth for an 8 kHz reference is limited to a maximum of 58 Hz. Digitally Controlled Oscillator (DCO) - the DCO receives the filtered signal from the Loop Filter, and based on its value, generates a corresponding digital output signal. The synchronization method of the DCO is dependent on the state of the ZL30110. In Normal Mode, the DCO provides an output signal which is frequency and phase locked to the selected input reference signal. In Freerun Mode, the DCO is free running with an accuracy equal to the accuracy of the OSCi 25 MHz source. Lock Indicator - the lock detector monitors if the output value of the phase detector is within the phase-lockwindow for a certain time. The selected phase-lock-window guarantees the stable operation of the LOCK pin with maximum network jitter and wander on the reference input. If the DPLL goes into FreeRun mode, the LOCK pin will initially stay high for 0.1 s. If at that point the DPLL is still in FreeRun mode, the LOCK pin will go low. In Freerun mode the LOCK pin will go low immediately. 2.3 Frequency Synthesizers The output of the DCO is used by the frequency synthesizer to generate the output clock which is synchronized to the inputs (REF). The frequency synthesizer uses digital techniques to generate output clock and advanced noise shaping techniques to minimize the output jitter. The clock and frame pulse outputs have limited driving capability and should be buffered when driving high capacitance loads. 2.4 State Machine As shown in Figure 1, the state machine controls the DPLL. 2.5 APLL The ZL30110 employ two Analog PLLs as a clock multiplying and rate conversion engine. One APLL is used to multiply the master clock (OSCi) to 125 MHz, a second APLL is used to convert the master clock (OSCi) to 100 MHz or 66 MHz clock. 2.6 Master Clock The ZL30110 can use either a clock or crystal as the master timing source. For recommended master timing circuits, see the Applications - Master Clock section. 9 Zarlink Semiconductor Inc. ZL30110 3.0 Data Sheet DPLL Modes of Operation The ZL30110 has two possible modes of operation; Normal, and Freerun. The ZL30110 starts up in Freerun mode, it automatically transitions to Normal mode if a valid reference is available and transitions to Freerun mode if the reference fails. 3.1 Freerun Mode Freerun mode is typically used when an independent clock source is required or immediately following system power-up before synchronization is achieved. In Freerun mode, the ZL30110 provides timing and synchronization signals which are based on the master clock frequency (supplied to OSCi pin) only and are not synchronized to the reference input signals. The accuracy of the output clock is equal to the accuracy of the master clock (OSCi). So if a ±32 ppm output clock is required, the master clock must also be ±32 ppm. See Applications - Section 5.2, “Master Clock“. Freerun Mode is also used for short durations while system synchronization is temporarily disrupted. The accuracy of the output clock during these input reference disruptions is better than the accuracy of the master clock (OSCi), but it is off compared to the reference before disruptions. 3.2 Normal Mode Normal mode is typically used when a system clock source, synchronized to the network is required. In Normal mode, the ZL30110 provides timing synchronization signals, which are synchronized to the input (REF). The input reference signal may have a nominal frequency of 8 kHz, 2.048 MHz, 8.192 MHz or 16.384 MHz. The frequency of the reference inputs are automatically detected by the reference monitors. When the ZL30110 comes out of RESET it will initially go into Freerun mode and generate a clock with the accuracy of its freerunning local oscillator (see Figure 4). If the ZL30110 determines that its selected reference is disrupted (see Figure 3), it will remain in Freerun until the selected reference is no longer disrupted. If the ZL30110 determines that the reference is not disrupted (see Figure 3) then the state machine will cause the DPLL to recover from Freerun and transition to Normal mode. When the ZL30110 is operating in Normal mode, if it determines that the input reference is disrupted (Figure 3) then its state machine will cause it to automatically go to Freerun mode. When the ZL30110 determines that its selected reference is not disrupted then the state machine will cause the DPLL to recover from Freerun and transition to Normal mode. REF_FAIL=0 RST Normal Freerun REF_FAIL=1 Figure 4 - DPLL Mode Switching 10 Zarlink Semiconductor Inc. ZL30110 4.0 Data Sheet Measures of Performance The following are some PLL performance indicators and their corresponding definitions. 4.1 Jitter Timing jitter is defined as the high frequency variation of the clock edges from their ideal positions in time. Wander is defined as the low-frequency variation of the clock edges from their ideal positions in time. High and low frequency variation imply phase oscillation frequencies relative to some demarcation frequency. (Often 10 Hz or 20 Hz for DS1 or E1, higher for SONET/SDH clocks.) Jitter parameters given in this data sheet are total timing jitter numbers, not cycle-to-cycle jitter. 4.2 Jitter Generation (Intrinsic Jitter) Jitter generation is the measure of the jitter produced by the PLL and is measured at its output. It is measured by applying a reference signal with no jitter to the input of the device, and measuring its output jitter. Jitter is usually measured with various band limiting filters depending on the applicable standards. 4.3 Jitter Transfer Jitter transfer or jitter attenuation refers to the magnitude of jitter at the output of a device for a given amount of jitter at the input of the device. Input jitter is applied at various amplitudes and frequencies, and output jitter is measured with various filters depending on the applicable standards. 4.4 Lock Time This is the time it takes the PLL to frequency lock to the input signal. Phase lock occurs when the input signal and output signal are aligned in phase with respect to each other within a certain phase distance (not including jitter). Lock time is affected by many factors which include: • initial input to output phase difference • initial input to output frequency difference • PLL loop filter bandwidth The presence of input jitter makes it difficult to define when the PLL is locked as it may not be able to align its output to the input within the required phase distance, dependent on the PLL bandwidth and the input jitter amplitude and frequency. 11 Zarlink Semiconductor Inc. ZL30110 5.0 Data Sheet Applications This section contains ZL30110 application specific details for power supply decoupling, reset operation, clock and crystal operation. 5.1 Power Supply Decoupling Jitter levels on the ZL30110 output clocks may increase if the device is exposed to excessive noise on its power pins. For optimal jitter performance, the ZL30110 device should be isolated from noise on power planes connected to its 3.3 V and 1.8 V supply pins. For recommended common layout practices, refer to Zarlink Application Note ZLAN-178. 5.2 Master Clock The ZL30110 can use either a clock or crystal as the master timing source. 5.2.1 Clock Oscillator When selecting a clock oscillator, numerous parameters must be considered. This includes absolute frequency, frequency change over temperature, output rise and fall times, output levels, duty cycle and phase noise. The output clock should be connected directly (not AC coupled) to the OSCi input of the ZL30110, and the OSCo output should be left open as shown in Figure 5. 1 Frequency 25 MHz 2 Tolerance as required (better than +/-50ppm) 3 Rise & fall time < 8 ns 4 Duty cycle 40% to 60% Table 1 - Clock Oscillator Specification ZL30110 +3.3 V OSCi +3.3 V 25 MHz OUT GND 0.1 µF OSCo No Connection Figure 5 - Clock Oscillator Circuit 12 Zarlink Semiconductor Inc. ZL30110 5.2.2 Data Sheet Crystal Oscillator Alternatively, a Crystal Oscillator may be used. The accuracy of a crystal oscillator depends on the crystal tolerance as well as the load capacitance tolerance. Typically, for a 25 MHz crystal specified with a 32 pF load capacitance, each 1 pF change in load capacitance contributes approximately 9 ppm to the frequency deviation. Consequently, capacitor tolerances and stray capacitances have a major effect on the accuracy of the oscillator frequency. The crystal should be a fundamental mode type - not an overtone. The fundamental mode crystal permits a simpler oscillator circuit with no additional filter components and is less likely to generate spurious responses. A typical crystal oscillator specification is shown in Table 2. . 1 Frequency 25 MHz 2 Tolerance as required (better than +/-50ppm) 3 Oscillation mode fundamental 4 Resonance mode parallel 5 Load capacitance as required 6 Maximum series resistance 50 Ω Table 2 - Crystal Oscillator Specification 13 Zarlink Semiconductor Inc. ZL30110 5.3 Data Sheet Power Up Sequence The ZL30110 requires that the 3.3 V supply is not powered up after the 1.8 V supply. This is to prevent the risk of latch-up due to the presence of protection diodes in the IO pads. Two options are given: 1. Power-up the 3.3 V supply fully first, then power up the 1.8 V supply 2. Power up the 3.3 V supply and the 1.8 V supply simultaneously, ensuring that the 3.3 V supply is never lower than a few hundred millivolts below the 1.8 V supply (e.g., by using a schottky diode or controlled slew rate) 5.4 Reset Circuit A simple power up reset circuit with about a 60 µs reset low time is shown in Figure 6. Resistor RP is for protection only and limits current into the RST pin during power down conditions. The reset low time is not critical but should be greater than 300 ns. ZL30110 +3.3 V R 10 kΩ RST RP 1 kΩ C 10 nF Figure 6 - Power-Up Reset Circuit 14 Zarlink Semiconductor Inc. ZL30110 6.0 Characteristics 6.1 AC and DC Electrical Characteristics Data Sheet Absolute Maximum Ratings* Parameter Symbol Min. Max. Units VDD_R -0.5 4.6 V VCORE_R -0.5 2.5 V 1 Supply voltage 2 Core supply voltage 3 Voltage on any digital pin VPIN -0.5 6 V 4 Voltage on OSCi and OSCo pin VOSC -0.3 VDD + 0.3 V 5 Current on any pin IPIN 30 mA 6 Storage temperature TST 125 °C 7 ESD rating 2k V -55 VESD * Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied. * Voltages are with respect to ground (GND) unless otherwise stated. Recommended Operating Conditions* Characteristics Sym. Min. Typ. Max. Units VDD 3.1 3.3 3.5 V VCORE 1.7 1.8 1.9 V 1 Supply voltage 2 Core supply voltage 3 Operating temperature TA -40 25 85 °C 4 Input Voltage VI 0 3.3 3.5 V Min. Max. Units Notes IDD 115 mA All Outputs loaded with 30 pf 20 mA All Outputs loaded with 30 pf * Voltages are with respect to ground (GND) unless otherwise stated. DC Electrical Characteristics* Characteristics Sym. 1 Supply current 2 Core supply current ICORE 3 Schmitt trigger Low to High threshold point VCIH 1.43 1.85 V 4 Schmitt trigger High to Low threshold point VCIL 0.8 1.1 V 5 Input leakage current IIL -105 105 µA 15 Zarlink Semiconductor Inc. VI=VDD or 0 V ZL30110 Data Sheet DC Electrical Characteristics* Characteristics Sym. Min. 2.4 6 High-level output voltage VOH 7 Low-level output voltage VOL Max. Units 0.4 Notes V IOH = 8 mA for clock outputs, 4 mA for status outputs V IOL = 8 mA for clock outputs, 4 mA for status outputs * Supply voltage and operating temperature are as per Recommended Operating Conditions. * Voltages are with respect to ground (GND) unless otherwise stated. AC Electrical Characteristics* - Timing Parameter Measurement Voltage Levels (see Figure 7). Characteristics Sym. CMOS Units VT 0.5xVDD V 1 Threshold Voltage 2 Rise and Fall Threshold Voltage High VHM 0.7xVDD V 3 Rise and Fall Threshold Voltage Low VLM 0.3xVDD V * Supply voltage and operating temperature are as per Recommended Operating Conditions. * Voltages are with respect to ground (GND) unless otherwise stated. Timing Reference Points V HM VT V LM ALL SIGNALS tIRF, tORF tIRF, tORF Figure 7 - Timing Parameter Measurement Voltage Levels 16 Zarlink Semiconductor Inc. ZL30110 Data Sheet AC Electrical Characteristics* - Timing for input reference (see Figure 8). Characteristics Symbol Min. Typ. Max. Units 1 8 kHz reference period tREF8kP 120 125 128 µs 2 2.048 MHz reference period tREF2P 263 488 712 ns 3 8.192 MHz reference period tREF8P 63 122 175 ns 4 16.384 MHz reference period tREF16P 38 61 75 ns 5 reference pulse width high or low tREFW 15 ns * Supply voltage and operating temperature are as per Recommended Operating Conditions. * Period Min/Max values are the limits to avoid a single-cycle fault detection. Short-term and long-term average periods must be within +/-130 ppm limit. AC Electrical Characteristics* - Input to output timing for synchronous clock (see Figure 8). Characteristics Symbol Min. Max. Units 1 8 kHz reference input to C65o delay tREF8_C65D -0.7 6.7 ns 2 2.048 MHz reference input to C65o delay tREF2_C65D 1.5 9.6 ns 3 8.192 MHz reference input to C65o delay tREF8_C65D 2.1 9.2 ns 4 16.384 MHz reference input to C65o delay tREF16_C65D 2.1 9.6 ns 5 C65o pulse width low tC65L 7.0 8.6 ns 6 Output clock rise or fall time tORF 1.1 2.3 ns * Supply voltage and operating temperature are as per Recommended Operating Conditions. Outputs loaded with 30 pF. tREF<xx>P tREFW tREFW REF tREF<x>_C65D tC65L C65o Figure 8 - Input to Output Timing for Synchronous Clock 17 Zarlink Semiconductor Inc. ZL30110 Data Sheet AC Electrical Characteristics* - Input to output timing for Asynchronous clocks (see Figure 9). Characteristics 25 MHz master clock input to C25a/b/c/d/e/fo delay 1 Symbol Min. Max. Units tM_C25D 3 14 ns Notes * Supply voltage and operating temperature are as per Recommended Operating Conditions. Master Clock tM_C25D Asynchronous Output Clocks 25MHz Figure 9 - Asynchronous Clocks Input to Output Timing AC Electrical Characteristics* - Output timing for Asynchronous clocks (see Figure 9). Characteristics Symbol Min. Max. Units Notes 1 C25a/b/c/d/e/fo pulse width low** tC25L 18 22 ns 30 pF output load 2 C125o pulse width low tC125L 3.2 4.6 ns 25 pF output load 3 C100o pulse width low tC100L 4.1 5.6 ns 30 pF output load 4 C66o pulse width low tC66L 6.8 8.0 ns 30 pF output load * Supply voltage and operating temperature are as per Recommended Operating Conditions. ** Buffered OSCi clock input, characterization data did not account for input clock duty cycle nor rise/fall time degradation. 6.2 Performance Characteristics Performance Characteristics* - Functional Characteristics 1 DPLL capture range Min. Typ. -130 Max. Units Notes +130 ppm The 25 MHz Master Clock oscillator set at 0.ppm Lock Time 2 DPLL 58 Hz Filter 1 s input reference = 8 kHz, ±100 ppm frequency offset 3 DPLL 922 Hz Filter 1 s input reference ≠ 8 kHz, ±100 ppm frequency offset 4 APLL 450 kHz Filter 150 µs * Supply voltage and operating temperature are as per Recommended Operating Conditions. 18 Zarlink Semiconductor Inc. ZL30110 Data Sheet Performance Characteristics* - Unfiltered Jitter Generation - Pk-Pk Max. [nspp] Characteristics 1 C65o (65.536 MHz) 0.60 3 C25a/b/c/d/e/fo (25 MHz) 0.20 4 C125o (125 MHz) 0.54 5 C100o (100 MHz) 0.60 6 C66o (66 MHz) 0.60 Notes * Supply voltage and operating temperature are as per Recommended Operating Conditions. Performance Characteristics* - Filtered Jitter Generation - RMS Characteristics Max. [psrms] 1 C25a/b/c/d/e/fo (25 MHz) - (625 kHz - Nyquist) 4 2 C125o (125 MHz) (625 kHz - Nyquist) 20 * Supply voltage and operating temperature are as per Recommended Operating Conditions. 19 Zarlink Semiconductor Inc. Notes Package Code c Zarlink Semiconductor 2003 All rights reserved. ISSUE ACN DATE APPRD. 1 2 3 CDCA CDCA CDCA 30-01-2004 15-08-2005 22-08-2005 Previous package codes For more information about all Zarlink products visit our Web Site at www.zarlink.com Information relating to products and services furnished herein by Zarlink Semiconductor Inc. or its subsidiaries (collectively “Zarlink”) is believed to be reliable. However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use. 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