IDT2308B 3.3V ZERO DELAY CLOCK MULTIPLIER COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES 3.3V ZERO DELAY CLOCK MULTIPLIER IDT2308B FEATURES: DESCRIPTION: • Phase-Lock Loop Clock Distribution for Applications ranging from 10MHz to 133MHz operating frequency • Distributes one clock input to two banks of four outputs • Separate output enable for each output bank • External feedback (FBK) pin is used to synchronize the outputs to the clock input • Output Skew <200 ps • Low jitter <200 ps cycle-to-cycle • 1x, 2x, 4x output options (see table): – IDT2308B-1 1x – IDT2308B-2 1x, 2x – IDT2308B-3 2x, 4x – IDT2308B-4 2x – IDT2308B-1H, -2H, and -5H for High Drive • No external RC network required • Operates at 3.3V VDD • Available in SOIC and TSSOP packages The IDT2308B is a high-speed phase-lock loop (PLL) clock multiplier. It is designed to address high-speed clock distribution and multiplication applications. The zero delay is achieved by aligning the phase between the incoming clock and the output clock, operable within the range of 10 to 133MHz. The IDT2308B has two banks of four outputs each that are controlled via two select addresses. By proper selection of input addresses, both banks can be put in tri-state mode. In test mode, the PLL is turned off, and the input clock directly drives the outputs for system testing purposes. In the absence of an input clock, the IDT2308B enters power down, and the outputs are tri-stated. In this mode, the device will draw less than 25µA. The IDT2308B is available in six unique configurations for both prescaling and multiplication of the Input REF Clock. (See available options table.) The PLL is closed externally to provide more flexibility by allowing the user to control the delay between the input clock and the outputs. The IDT2308B is characterized for both Industrial and Commercial operation. FUNCTIONAL BLOCK DIAGRAM (-3, -4) FBK 16 2 2 CLKA1 PLL 1 2 (-5) REF 3 CLKA2 14 CLKA3 15 CLKA4 S2 S1 8 9 Control Logic (-2, -3) 2 6 CLKB1 7 CLKB2 10 CLKB3 11 CLKB4 The IDT logo is a registered trademark of Integrated Device Technology, Inc. COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES MAY 2010 1 c 2010 Integrated Device Technology, Inc. DSC 6995/3 IDT2308B 3.3V ZERO DELAY CLOCK MULTIPLIER COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES ABSOLUTE MAXIMUM RATINGS(1) PIN CONFIGURATION Symbol REF 1 16 FBK CLKA1 2 15 CLKA4 CLKA2 3 14 CLKA3 VDD 4 13 VDD GND 5 CLKB1 6 CLKB2 S2 CLKA2 (2) VDD GND Supply Voltage Range –0.5 to +4.6 V VI (2) Input Voltage Range (REF) –0.5 to +5.5 V VI Input Voltage Range –0.5 to V IIK (VI < 0) Input Clamp Current –50 mA IOK Terminal Voltage with Respect ±50 mA (VO < 0 or VO > VDD) to GND (inputs VIH 2.5, VIL 2.5) Continuous Output Current ±50 mA ±100 mA IO 11 CLKB4 (VO = 0 to VDD) 7 10 VDD or GND Continuous Current CLKB3 TA = 55°C Maximum Power Dissipation 0.7 W 8 9 S1 (in still air)(3) TSTG Storage Temperature Range –65 to +150 °C Operating Commercial Temperature 0 to +70 °C Temperature Range -40 to +85 °C Input Reference Clock, 5 Volt Tolerant Input 2 Clock Output for Bank A 3 Clock Output for Bank A 4 3.3V Supply Industrial Temperature Range NOTES: 1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. 2. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed. 3. The maximum package power dissipation is calculated using a junction temperature Functional Description 1 Operating Temperature of 150°C and a board trace length of 750 mils. 5 Ground (2) 6 Clock Output for Bank B APPLICATIONS: CLKB2(2) 7 Clock Output for Bank B S2(3) 8 Select Input, Bit 2 • • • • • CLKB1 S1(3) 9 Select Input, Bit 1 CLKB3 (2) 10 Clock Output for Bank B CLKB4 (2) 11 Clock Output for Bank B GND 12 Ground VDD 13 3.3V Supply CLKA3(2) 14 Clock Output for Bank A (2) 15 Clock Output for Bank A 16 PLL Feedback Input CLKA4 FBK VDD+0.5 GND Pin Number REF Unit 12 PIN DESCRIPTION CLKA1(2) Max. VDD (except REF) SOIC/ TSSOP TOP VIEW (1) Rating NOTES: 1. Weak pull down. 2. Weak pull down on all outputs. 3. Weak pull ups on these inputs. 2 SDRAM Telecom Datacom PC Motherboards/Workstations Critical Path Delay Designs IDT2308B 3.3V ZERO DELAY CLOCK MULTIPLIER COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES FUNCTION TABLE(1) SELECT INPUT DECODING S2 S1 CLK A CLK B Output Source PLL Shut Down L L Tri-State Tri-State PLL Y L H Driven Tri-State PLL N H L Driven Driven REF Y H H Driven Driven PLL N NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level AVAILABLE OPTIONS FOR IDT2308B Device Feedback From Bank A Frequency Bank B Frequency IDT2308B-1 Bank A or Bank B Reference Reference IDT2308B-1H Bank A or Bank B Reference Reference IDT2308B-2 Bank A Reference Reference/2 IDT2308B-2 Bank B 2 x Reference Reference IDT2308B-2H Bank A Reference Reference/2 IDT2308B-2H Bank B 2 x Reference Reference IDT2308B-3 Bank A 2 x Reference Reference or Reference(1) IDT2308B-3 Bank B 4 x Reference 2 x Reference IDT2308B-4 Bank A or Bank B 2 x Reference 2 x Reference IDT2308B-5H Bank A or Bank B Reference/2 Reference/2 NOTE: 1. Output phase is indeterminant (0° or 180° from input clock). 3 IDT2308B 3.3V ZERO DELAY CLOCK MULTIPLIER COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES ZERO DELAY AND SKEW CONTROL To close the feedback loop of the IDT2308B, the FBK pin can be driven from any of the eight available output pins. The output driving the FBK pin will be driving a total load of 7pF plus any additional load that it drives. The relative loading of this output (with respect to the remaining outputs) can adjust the input-output delay. For applications requiring zero input-output delay, all outputs including the one providing feedback should be equally loaded. If input-output delay adjustments are required, use the Output Load Difference Chart to calculate loading differences between the feedback output and remaining outputs. Ensure the outputs are loaded equally, for zero output-output skew. REF TO CLKA/CLKB DELAY vs. OUTPUT LOAD DIFFERENCE BETWEEN FBK PIN AND CLKA/CLKB PINS 1500 REF to CLKA/CLKB Delay (ps) 1000 500 0 -30 -25 -20 -15 -10 -5 0 5 10 15 -500 -1000 -1500 OUTPUT LOAD DIFFERENCE BETWEEN FBK PIN AND CLKA/CLKB PINS ( pF) 4 20 25 30 IDT2308B 3.3V ZERO DELAY CLOCK MULTIPLIER COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES OPERATING CONDITIONS- COMMERCIAL Symbol VDD Parameter Test Conditions Min. Max. Unit 3 3.6 V Supply Voltage TA Operating Temperature (Ambient Temperature) 0 70 °C CL Load Capacitance below 100MHz — 30 pF Load Capacitance from 100MHz to 133MHz — 15 pF — 7 pF CIN (1) Input Capacitance NOTE: 1. Applies to both REF and FBK. DC ELECTRICAL CHARACTERISTICS - COMMERCIAL Symbol Parameter Conditions Min. Typ.(1) Max. Unit VIL Input LOW Voltage Level — — 0.8 V VIH Input HIGH Voltage Level 2 — — V IIL Input LOW Current — — 50 µA VIN = 0V IIH Input HIGH Current VIN = VDD — — 100 µA VOL Output LOW Voltage IOL = 8mA (-1, -2, -3, -4) — — 0.4 V VOH Output HIGH Voltage IOH = -8mA (-1, -2, -3, -4) 2.4 — — V µA IOL = 12mA (-1H, -2H, -5H) IOH = -12mA (-1H, -2H, -5H) IDD_PD Power Down Current REF = 0MHz (S2 = S1 = H) 100MHz CLKA (-1, -2, -3, -4) IDD Supply Current — — 12 — — 45 100MHz CLKA (-1H, -2H, -5H) — — 70 Unloaded Outputs 66MHz CLKA (-1, -2, -3, -4) — — 32 Select Inputs at VDD or GND 66MHz CLKA (-1H, -2H, -5H) — — 50 5 33MHz CLKA (-1, -2, -3, -4) — — 18 33MHz CLKA (-1H, -2H, -5H) — — 30 mA IDT2308B 3.3V ZERO DELAY CLOCK MULTIPLIER COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES SWITCHING CHARACTERISTICS - COMMERCIAL Symbol Parameter Conditions Min. Typ. Max. Unit t1 Output Frequency 30pF Load, all devices 10 — 100 MHz t1 Output Frequency 20pF Load, -1H, -2H, -5H Devices(1) 10 — 133.3 MHz t1 Output Frequency 15pF Load, -1, -2, -3, -4 devices 10 — 133.3 MHz Duty Cycle = t2 ÷ t1 Measured at 1.4V, FOUT = 66.66MHz 40 50 60 % 45 50 55 % (-1, -2, -3, -4, -1H, -2H, -5H) 30pF Load Duty Cycle = t2 ÷ t1 Measured at 1.4V, FOUT = 50MHz (-1, -2, -3, -4, -1H, -2H, -5H) 15pF Load t3 Rise Time (-1, -2, -3, -4) Measured between 0.8V and 2V, 30pF Load — — 2.2 ns t3 Rise Time (-1, -2, -3, -4) Measured between 0.8V and 2V, 15pF Load — — 1.5 ns t3 Rise Time (-1H, -2H, -5H) Measured between 0.8V and 2V, 30pF Load — — 1.5 ns t4 Fall Time (-1, -2, -3, -4) Measured between 0.8V and 2V, 30pF Load — — 2.2 ns t4 Fall Time (-1, -2, -3, -4) Measured between 0.8V and 2V, 15pF Load — — 1.5 ns t4 Fall Time (-1H, -5H) Measured between 0.8V and 2V, 30pF Load — — 1.25 ns t5 Output to Output Skew on same Bank All outputs equally loaded — — 200 ps Output to Output Skew (-1H, -2H, -5H) All outputs equally loaded — — 200 ps Output Bank A to Output Bank B (-1, -4, -2H, -5H) All outputs equally loaded — — 200 ps Output Bank A to Output Bank B Skew (-2, -3) All outputs equally loaded — — 400 ps t6 Delay, REF Rising Edge to FBK Rising Edge Measured at VDD/2 — 0 ±250 ps t7 Device to Device Skew Measured at VDD/2 on the FBK pins of devices — 0 700 ps t8 Output Slew Rate Measured between 0.8V and 2V on -1H, -2H, -5H 1 — — V/ns tJ Cycle to Cycle Jitter Measured at 66.67 MHz, loaded outputs, 15pF Load — — 200 (-1, -2, -3, -4) device using Test Circuit 2 (-1, -1H, -4, -5H) tJ tLOCK Measured at 66.67 MHz, loaded outputs, 30pF Load — — 200 Measured at 133.3 MHz, loaded outputs, 15pF Load — — 100 Cycle to Cycle Jitter Measured at 66.67 MHz, loaded outputs, 30pF Load — — 400 (-2, -2H, -3) Measured at 66.67 MHz, loaded outputs, 15pF Load — — 400 PLL Lock Time Stable Power Supply, valid clocks presented — — 1 on REF and FBK pins NOTE: 1. IDT2308B-5H has maximum input frequency of 133.33 MHz and maximum output of 66.67MHz. 6 ps ps ms IDT2308B 3.3V ZERO DELAY CLOCK MULTIPLIER COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES OPERATING CONDITIONS- INDUSTRIAL Symbol Parameter Min. Max. Unit 3 3.6 V Operating Temperature (Ambient Temperature) -40 +85 °C Load Capacitance below 100MHz — 30 pF Load Capacitance from 100MHz to 133MHz — 15 pF — 7 pF VDD Supply Voltage TA CL CIN Test Conditions (1) Input Capacitance NOTE: 1. Applies to both REF and FBK. DC ELECTRICAL CHARACTERISTICS - INDUSTRIAL Symbol Parameter Conditions Min. Typ.(1) Max. Unit — — 0.8 V VIL Input LOW Voltage Level VIH Input HIGH Voltage Level 2 — — V IIL Input LOW Current VIN = 0V — — 50 µA IIH Input HIGH Current VIN = VDD — — 100 µA VOL Output LOW Voltage IOL = 8mA (-1, -2, -3, -4) — — 0.4 V 2.4 — — V — — 25 µA IOL = 12mA (-1H, -2H, -5H) VOH Output HIGH Voltage IOH = -8mA (-1, -2, -3, -4) IOH = -12mA (-1H, -2H, -5H) IDD_PD IDD Power Down Current Supply Current REF = 0MHz (S2 = S1 = H) 100MHz CLKA (-1, -2, -3, -4) — — 45 100MHz CLKA (-1H, -2H, -5H) — — 70 Unloaded Outputs 66MHz CLKA (-1, -2, -3, -4) — — 32 Select Inputs at VDD or GND 66MHz CLKA (-1H, -2H, -5H) — — 50 33MHz CLKA (-1, -2, -3, -4) — — 18 33MHz CLKA (-1H, -2H, -5H) — — 30 7 mA IDT2308B 3.3V ZERO DELAY CLOCK MULTIPLIER COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES SWITCHING CHARACTERISTICS - INDUSTRIAL Symbol t1 Parameter Conditions Output Frequency 30pF Load, all devices (1) Min. Typ. Max. Unit 10 100 MHz t1 Output Frequency 20pF Load, -1H, -2H, -5H Devices 10 133.3 MHz t1 Output Frequency 15pF Load, -1, -2, -3, -4 devices 10 133.3 MHz 40 50 60 % 45 50 55 % Duty Cycle = t2 ÷ t1 Measured at 1.4V, FOUT = 66.66MHz (-1, -2, -3, -4, -1H, -2H, -5H) 30pF Load Duty Cycle = t2 ÷ t1 Measured at 1.4V, FOUT = 50MHz (-1, -2, -3, -4, -1H, -2H, -5H) 15pF Load t3 Rise Time (-1, -2, -3, -4) Measured between 0.8V and 2V, 30pF Load 2.2 ns t3 Rise Time (-1, -2, -3, -4) Measured between 0.8V and 2V, 15pF Load 1.5 ns t3 Rise Time (-1H, -2H, -5H) Measured between 0.8V and 2V, 30pF Load 1.5 ns t4 Fall Time (-1, -2, -3, -4) Measured between 0.8V and 2V, 30pF Load 2.5 ns t4 Fall Time (-1, -2, -3, -4) Measured between 0.8V and 2V, 15pF Load 1.5 ns t4 Fall Time (-1H, -5H) Measured between 0.8V and 2V, 30pF Load 1.25 ns t5 Output to Output Skew on same Bank All outputs equally loaded 200 ps Output to Output Skew (-1H, -2H, -5H) All outputs equally loaded 200 ps Output Bank A to Output Bank B (-1, -4, -2H, -5H) All outputs equally loaded 200 ps Output Bank A to Output Bank B Skew (-2, -3) All outputs equally loaded 400 ps t6 Delay, REF Rising Edge to FBK Rising Edge Measured at VDD/2 0 ±250 ps t7 Device to Device Skew Measured at VDD/2 on the FBK pins of devices 0 700 ps t8 Output Slew Rate Measured between 0.8V and 2V on -1H, -2H, -5H 1 V/ns 200 (-1, -2, -3, -4) device using Test Circuit 2 tJ Cycle to Cycle Jitter (-1, -1H, -4, -5H) tJ tLOCK Measured at 66.67 MHz, loaded outputs, 15pF Load Measured at 66.67 MHz, loaded outputs, 30pF Load 200 Measured at 133.3 MHz, loaded outputs, 15pF Load 100 Cycle to Cycle Jitter Measured at 66.67 MHz, loaded outputs, 30pF Load 400 (-2, -2H, -3) Measured at 66.67 MHz, loaded outputs, 15pF Load 400 PLL Lock Time Stable Power Supply, valid clocks presented 1 on REF and FBK pins NOTE: 1. IDT2308B-5H has maximum input frequency of 133.33 MHz and maximum output of 66.67MHz. 8 ps ps ms IDT2308B 3.3V ZERO DELAY CLOCK MULTIPLIER COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES SWITCHING WAVEFORMS t1 t2 1.4V 1.4V 1.4V Duty Cycle Timing Output 0.8V 2V 0.8V 2V 0V t4 t3 All Outputs Rise/Fall Time 1.4V Output 3.3V 1.4V Output t5 Output to Output Skew VDD/2 Input VDD/2 FBK t6 Input to Output Propagation Delay VDD/2 FBK, Device 1 VDD/2 FBK, Device 2 t7 Device to Device Skew 9 IDT2308B 3.3V ZERO DELAY CLOCK MULTIPLIER COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES TYPICAL DUTY CYCLE(1) AND IDD TRENDS(2) FOR IDT2308B-1, 2, 3, AND 4 Duty Cycle vs VDD (for 30pf loads over frequency - 3.3V, 25C) Duty Cycle vs VDD (for 15pF loads over frequency - 3.3V, 25C) 60 58 58 56 56 54 Duty Cycle (%) Duty Cycle (%) 60 52 33MHz 66MHz 100MHz 50 48 54 52 48 46 46 44 44 42 42 40 33MHz 66MHz 100MHz 133MHz 50 40 3 3.1 3.2 3.3 3.4 3.5 3 3.6 3.1 3.2 VDD (V) 3.5 3.6 Duty Cycle vs Frequency (for 15pF loads over temperature - 3.3V) 60 60 58 58 56 56 Duty Cycle (%) Duty Cycle (%) 3.4 VDD (V) Duty Cycle vs Frequency (for 30pf loads over temperature - 3.3V) 54 52 -40C 0C 25C 70C 85C 50 48 54 52 -40C 0C 25C 70C 85C 50 48 46 46 44 44 42 42 40 40 20 40 60 80 100 120 140 20 40 60 Frequency (MHz) 80 100 120 140 Frequency (MHz) IDD vs Number of Loaded Outputs (for 30pf loads over frequency - 3.3V, 25C) IDD vs Number of Loaded Outputs (for 15pF loads over frequency - 3.3V, 25C) 140 140 120 120 100 100 80 IDD (mA) IDD (mA) 3.3 33MHz 66MHz 100MHz 60 80 60 40 40 20 20 0 33MHz 66MHz 100MHz 0 0 2 4 6 8 0 Number of Loaded Outputs 2 4 6 8 Number of Loaded Outputs NOTES: 1. Duty Cycle is taken from typical chip measured at 1.4V. 2. IDD data is calculated from IDD = ICORE + nCVf, where ICORE is the Unloaded Current (n = Number of Outputs; C = Capacitance Load per Output (F); V = Voltage Supply(V); f = Frequency (Hz). 10 IDT2308B 3.3V ZERO DELAY CLOCK MULTIPLIER COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES TYPICAL DUTY CYCLE(1) AND IDD TRENDS(2) FOR IDT2308B-1H, -2H, AND -5H Duty Cycle vs VDD (for 30pf loads over frequency - 3.3V, 25C) Duty Cycle vs VDD (for 15pF loads over frequency - 3.3V, 25C) 60 58 58 56 56 54 Duty Cycle (%) Duty Cycle (%) 60 52 33MHz 66MHz 100MHz 50 48 54 52 48 46 46 44 44 42 42 40 33MHz 66MHz 100MHz 133MHz 50 40 3 3.1 3.2 3.3 3.4 3.5 3 3.6 3.1 3.2 VDD (V) 3.5 3.6 Duty Cycle vs Frequency (for 15pF loads over temperature - 3.3V) 60 60 58 58 56 56 Duty Cycle (%) Duty Cycle (%) 3.4 VDD (V) Duty Cycle vs Frequency (for 30pf loads over temperature - 3.3V) 54 52 -40C 0C 25C 70C 85C 50 48 54 52 -40C 0C 25C 70C 85C 50 48 46 46 44 44 42 42 40 40 20 40 60 80 100 120 140 20 40 60 Frequency (MHz) 80 100 120 140 Frequency (MHz) IDD vs Number of Loaded Outputs (for 30pf loads over frequency - 3.3V, 25C) IDD vs Number of Loaded Outputs (for 15pF loads over frequency - 3.3V, 25C) 160 160 140 140 120 120 100 100 80 IDD (mA) IDD (mA) 3.3 33MHz 66MHz 100MHz 60 80 33MHz 66MHz 100MHz 60 40 40 20 20 0 0 0 2 4 6 0 8 2 4 6 8 Number of Loaded Outputs Number of Loaded Outputs NOTES: 1. Duty Cycle is taken from typical chip measured at 1.4V. 2. IDD data is calculated from IDD = ICORE + nCVf, where ICORE is the Unloaded Current (n = Number of Outputs; C = Capacitance Load per Output (F); V = Voltage Supply(V); f = Frequency (Hz). 11 IDT2308B 3.3V ZERO DELAY CLOCK MULTIPLIER COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES TEST CIRCUITS TEST CIRCUIT 1 VDD VDD 0.1µF TEST CIRCUIT 2 OUTPUTS CLKOUT 0.1µF 1KΩ CLKOUT OUTPUTS CLOAD 1KΩ 10pF VDD VDD 0.1µF 0.1µF GND GND GND GND Test Circuit for t8, Output Slew Rate On -1H, -2H, and -5H Device Test Circuit for all Parameters Except t8 12 IDT2308B 3.3V ZERO DELAY CLOCK MULTIPLIER COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES ORDERING INFORMATION IDT XXXXX Device Type XX Package X Process Blank I Commercial (0oC to +70oC) Industrial (-40oC to +85oC) DC PG Small Outline Thin Shrink Small Outline Package 2308B-1 2308B-2 2308B-3 2308B-4 2308B-1H 2308B-2H 2308B-5H } } Ordering Code Zero Delay Clock Buffer With Standard Drive Zero Delay Clock Buffer with High Drive Package Type Operating Range IDT2308B-1DCG 16-Pin SOIC Commercial IDT2308B-1DCGI 16-Pin SOIC Industrial IDT2308B-1HDCG 16-Pin SOIC Commercial IDT2308B-1HDCGI 16-Pin SOIC Industrial IDT2308B-1HPG 16-Pin TSSOP Commercial IDT2308B-1HPGI 16-Pin TSSOP Industrial IDT2308B-1HPGGI 16-Pin TSSOP Industrial IDT2308B-2DCG 16-Pin SOIC Commercial IDT2308B-2DCGI 16-Pin SOIC Industrial IDT2308B-4DCG 16-Pin SOIC Commercial IDT2308B-4DCGI 16-Pin SOIC Industrial IDT2308B-5HPG 16-Pin TSSOP Commercial "G" denotes Pb-free, RoHS compliant package CORPORATE HEADQUARTERS 6024 Silver Creek Valley Road San Jose, CA 95138 for SALES: 800-345-7015 or 408-284-8200 fax: 408-284-2775 www.idt.com 13 for Tech Support: [email protected]