IDT2308A 3.3V ZERO DELAY CLOCK MULTIPLIER COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES 3.3V ZERO DELAY CLOCK MULTIPLIER FEATURES: IDT2308A 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): – IDT2308A-1 1x – IDT2308A-2 1x, 2x – IDT2308A-3 2x, 4x – IDT2308A-4 2x – IDT2308A-1H and -2H for High Drive • No external RC network required • Operates at 3.3V VDD • Available in SOIC and TSSOP packages The IDT2308A 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 IDT2308A 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 IDT2308A enters power down. In this mode, the device will draw less than 12µA for Commercial Temperature range and less than 25µA for Industrial temperature range, and the outputs are tri-stated. The IDT2308A 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 IDT2308A is characterized for both Industrial and Commercial operation. FUNCTIONAL BLOCK DIAGRAM (-3, -4) FBK 16 2 1 2 CLKA1 PLL 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 JULY 2004 1 c 2004 Integrated Device Technology, Inc. DSC 6587/8 IDT2308A 3.3V ZERO DELAY CLOCK MULTIPLIER COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES ABSOLUTE MAXIMUM RATINGS(1) PIN CONFIGURATION Symbol Rating 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 IO Continuous Output Current ±50 mA VDD or GND Continuous Current ±100 mA TA = 55°C Maximum Power Dissipation 0.7 W –65 to +150 °C 0 to +70 °C -40 to +85 °C 1 16 FBK CLKA1 2 15 CLKA4 CLKA2 3 14 CLKA3 VDD 4 13 VDD GND 5 12 GND CLKB1 6 11 CLKB4 CLKB3 TSTG Storage Temperature Range S1 Operating Commercial Temperature Temperature Range Operating Industrial Temperature Temperature Range 7 10 S2 8 9 (except REF) (in still air)(3) 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 PIN DESCRIPTION 1 Input Reference Clock, 5 Volt Tolerant Input CLKA1(2) 2 Clock Output for Bank A CLKA2 3 Clock Output for Bank A 4 3.3V Supply (2) VDD GND 5 Ground (2) 6 Clock Output for Bank B CLKB2(2) 7 Clock Output for Bank B S2(3) 8 Select Input, Bit 2 CLKB1 S1(3) of 150°C and a board trace length of 750 mils. Functional Description REF (1) 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 CLKA4(2) 15 Clock Output for Bank A FBK 16 PLL Feedback Input VDD+0.5 (VO = 0 to VDD) SOIC/ TSSOP TOP VIEW Pin Number Unit VDD REF CLKB2 Max. APPLICATIONS: • • • • • 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 IDT2308A 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 IDT2308A Device Feedback From Bank A Frequency Bank B Frequency IDT2308A-1 Bank A or Bank B Reference Reference IDT2308A-1H Bank A or Bank B Reference Reference IDT2308A-2 Bank A Reference Reference/2 IDT2308A-2 Bank B 2 x Reference Reference IDT2308A-2H Bank A Reference Reference/2 IDT2308A-2H Bank B 2 x Reference Reference IDT2308A-3 Bank A 2 x Reference Reference or Reference(1) IDT2308A-3 Bank B 4 x Reference 2 x Reference IDT2308A-4 Bank A or Bank B 2 x Reference 2 x Reference NOTE: 1. Output phase is indeterminant (0° or 180° from input clock). ZERO DELAY AND SKEW CONTROL To close the feedback loop of the IDT2308A, 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. Ensure the outputs are loaded equally, for zero output-output skew. 3 IDT2308A 3.3V ZERO DELAY CLOCK MULTIPLIER COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES OPERATING CONDITIONS- COMMERCIAL Symbol Min. Max. Unit VDD Supply Voltage 3 3.6 V TA Operating Temperature (Ambient Temperature) 0 70 °C CL Load Capacitance below 100MHz — 30 pF Load Capacitance from 100MHz to 133MHz — 15 pF Input Capacitance — 7 pF CIN Parameter Test Conditions (1) NOTE: 1. Applies to both REF and FBK. DC ELECTRICAL CHARACTERISTICS - COMMERCIAL Symbol Parameter Conditions Min. Typ.(1) Max. Unit — — 0.8 V 2 — — V — — 50 µA VIL Input LOW Voltage Level VIH Input HIGH Voltage Level IIL Input LOW Current IIH Input HIGH Current VIN = VDD — — 100 µA VOL Output LOW Voltage IOL = 8mA (-1, -2, -3, -4) — — 0.4 V 2.4 — — V µA VIN = 0V IOL = 12mA (-1H, -2H) VOH Output HIGH Voltage IOH = -8mA (-1, -2, -3, -4) IOH = -12mA (-1H, -2H) IDD_PD IDD Power Down Current Supply Current REF = 0MHz (S2 = S1 = H) — — 12 100MHz CLKA (-1, -2, -3, -4) — — 45 100MHz CLKA (-1H, -2H) — — 70 Unloaded Outputs 66MHz CLKA (-1, -2, -3, -4) — — 32 Select Inputs at VDD or GND 66MHz CLKA (-1H, -2H) — — 50 33MHz CLKA (-1, -2, -3, -4) — — 18 33MHz CLKA (-1H, -2H) — — 30 4 mA IDT2308A 3.3V ZERO DELAY CLOCK MULTIPLIER COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES SWITCHING CHARACTERISTICS - COMMERCIAL Symbol Parameter Conditions t1 Output Frequency 30pF Load, all devices t1 Output Frequency 20pF Load, -1H, -2H Devices t1 Output Frequency 15pF Load, -1, -2, -3, -4 devices Duty Cycle = t2 ÷ t1 Measured at 1.4V, FOUT = 66.66MHz (-1, -2, -3, -4, -1H, -2H) 30pF Load Duty Cycle = t2 ÷ t1 Measured at 1.4V, FOUT = 50MHz Min. Typ. Max. Unit 10 — 100 MHz 10 — 133.3 MHz 10 — 133.3 MHz 40 50 60 % 45 50 55 % (-1, -2, -3, -4, -1H, -2H) 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) 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) 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) All outputs equally loaded — — 200 ps Output Bank A to Output Bank B (-1, -4, -2H) 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 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) tJ tLOCK Cycle to Cycle Jitter Measured at 66.67 MHz, loaded outputs, 30pF Load — — 200 Measured at 133.3 MHz, loaded outputs, 15pF Load — — 100 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 5 ps ps ms IDT2308A 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 Input Capacitance — 7 pF VDD Supply Voltage TA CL CIN Test Conditions (1) 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 100MHz CLKA (-1, -2, -3, -4) — — 45 100MHz CLKA (-1H, -2H) — — 70 Unloaded Outputs 66MHz CLKA (-1, -2, -3, -4) — — 32 Select Inputs at VDD or GND 66MHz CLKA (-1H, -2H) — — 50 33MHz CLKA (-1, -2, -3, -4) — — 18 33MHz CLKA (-1H, -2H) — — 30 IOL = 12mA (-1H, -2H) VOH Output HIGH Voltage IOH = -8mA (-1, -2, -3, -4) IOH = -12mA (-1H, -2H) IDD_PD IDD Power Down Current Supply Current REF = 0MHz (S2 = S1 = H) 6 mA IDT2308A 3.3V ZERO DELAY CLOCK MULTIPLIER COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES SWITCHING CHARACTERISTICS - INDUSTRIAL Symbol Parameter Conditions Min. Typ. Max. Unit t1 Output Frequency 30pF Load, all devices 10 ⎯ 100 MHz t1 Output Frequency t1 Output Frequency 20pF Load, -1H, -2H Devices 10 ⎯ 133.3 MHz 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 % (-1, -2, -3, -4, -1H, -2H) 30pF Load Duty Cycle = t2 ÷ t1 Measured at 1.4V, FOUT = 50MHz 45 50 55 % (-1, -2, -3, -4, -1H, -2H) 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) 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) 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) All outputs equally loaded ⎯ ⎯ 200 ps Output Bank A to Output Bank B (-1, -4, -2H) 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 1 ⎯ ⎯ V/ns ⎯ ⎯ 200 (-1, -2, -3, -4) device using Test Circuit 2 tJ Cycle to Cycle Jitter 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 (-1, -1H, -4) tJ tLOCK Measured at 66.67 MHz, loaded outputs, 15pF Load on REF and FBK pins 7 ps ps ms IDT2308A 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 1.4V Output t5 Output to Output Skew VDD/2 Input VDD/2 FBK t6 Input to Output Propagation Delay FBK, Device 1 FBK, Device 2 3.3V VDD/2 VDD/2 t7 Device to Device Skew 8 IDT2308A 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 and -2H Devices Test Circuit for all Parameters Except t8 9 IDT2308A 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 DCG PG PGG Small Outline SOIC - Green Thin Shrink Small Outline Package TSSOP - Green 2308A-1 2308A-2 2308A-3 2308A-4 2308A-1H 2308A-2H } Ordering Code } Zero Delay Clock Buffer with Standard Drive Zero Delay Clock Buffer with High Drive Package Type Operating Range IDT2308A-1DC 16-Pin SOIC Commercial IDT2308A-1DCG 16-Pin SOIC Commercial IDT2308A-1DCGI 16-Pin SOIC Industrial IDT2308A-1DCI 16-Pin SOIC Industrial IDT2308A-1HDC 16-Pin SOIC Commercial IDT2308A-1HDCG 16-Pin SOIC Commercial IDT2308A-1HDCGI 16-Pin SOIC Industrial IDT2308A-1HDCI 16-Pin SOIC Industrial IDT2308A-1HPG 16-Pin TSSOP Commercial IDT2308A-1HPGG 16-Pin TSSOP Commercial IDT2308A-1HPGGI 16-Pin TSSOP Industrial IDT2308A-1HPGI 16-Pin TSSOP Industrial IDT2308A-2DC 16-Pin SOIC Commercial IDT2308A-2DCG 16-Pin SOIC Commercial IDT2308A-2DCGI 16-Pin SOIC Industrial IDT2308A-2DCI 16-Pin SOIC Industrial IDT2308A-2HDC 16-Pin SOIC Commercial IDT2308A-2HDCI 16-Pin SOIC Industrial IDT2308A-3DC 16-Pin SOIC Commercial IDT2308A-3DCG 16-Pin SOIC Commercial IDT2308A-3DCGI 16-Pin SOIC Industrial IDT2308A-3DCI 16-Pin SOIC Industrial IDT2308A-4DC 16-Pin SOIC Commercial IDT2308A-4DCI 16-Pin SOIC Industrial CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com 10 for Tech Support: [email protected] (408) 654-6459