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| IDT2305NZT 2.5V CLOCK BUFFER COMMERCIAL TEMPERATURE RANGE 2.5V CLOCK BUFFER IDT2305NZT FEATURES: * * * * * * * Clock Distribution 10MHz to 133MHz operating frequency Distributes one clock input to one bank of five outputs Output Skew < 250ps No external RC network required Operates at 2.5V VDD Available in SOIC package DESCRIPTION: The IDT2305NZT is a high-speed clock buffer, designed to address high-speed clock distribution applications. IDT2305NZT accepts one reference input, and drives out five low skew clocks. FUNCTIONAL BLOCK DIAGRAM 8 CLKOUT 3 REF 1 Control Logic 2 CLK1 CLK2 5 7 CLK3 CLK4 The IDT logo is a registered trademark of Integrated Device Technology, Inc. COMMERCIAL TEMPERATURE RANGE 1 c 2006 Integrated Device Technology, Inc. JUNE 2006 DSC 7020/4 IDT2305NZT 2.5V CLOCK BUFFER COMMERCIAL TEMPERATURE RANGE PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS(1) Symbol VDD Rating Supply Voltage Range Input Voltage Range (REF) Input Voltage Range (except REF) IIK (VI < 0) IO (VO = 0 to VDD) VDD or GND TA = 55C (in still air)(3) TSTG Operating Temperature Input Clamp Current Continuous Output Current Continuous Current Maximum Power Dissipation Storage Temperature Range Commercial Temperature Range Max. -0.5 to +4.6 -0.5 to +5.5 -0.5 to VDD+0.5 -50 50 100 0.7 -65 to +150 0 to +70 mA mA mA W C C Unit V V V REF CLK2 CLK1 GND 1 2 3 4 8 7 6 5 CLKOUT CLK4 VDD CLK3 VI (2) VI SOIC TOP VIEW 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 of 150C and a board trace length of 750 mils. APPLICATIONS: * * * * * SDRAM Telecom Datacom PC Motherboards/Workstations Critical Path Delay Designs PIN DESCRIPTION Pin Name REF (1) Pin Number 1 2 3 4 5 6 7 Type IN OUT OUT GND OUT PWR OUT OUT Output clock Output clock Ground Output clock 2.5V Supply Output clock Output clock Functional Description Input reference clock, 3.3V tolerant input CLK2(2) CLK1 GND CLK3 VDD CLK4 (2) (2) (2) (2) CLKOUT 8 NOTES: 1. Weak pull down. 2. Weak pull down on all outputs. 2 IDT2305NZT 2.5V CLOCK BUFFER COMMERCIAL TEMPERATURE RANGE OPERATING CONDITIONS Symbol VDD TA CL CIN Supply Voltage Operating Temperature (Ambient Temperature) Load Capacitance 10MHz - 133MHz Input Capacitance Parameter Min. 2.3 0 -- -- Max. 2.7 +70 15 7 Unit V C pF pF DC ELECTRICAL CHARACTERISTICS Symbol VIL VIH IIL IIH VOL VOH IDD_PD IDD Parameter Input LOW Voltage Level Input HIGH Voltage Level Input LOW Current Input HIGH Current Output LOW Voltage Output HIGH Voltage Power Down Current Supply Current VIN = 0V VIN = VDD Standard Drive, IOL = 8mA Standard Drive, IOH = -8mA REF = 0MHz Unloaded Outputs at 66.66MHz Conditions Min. -- 1.7 -- -- -- 2 -- -- Max. 0.7 -- 50 100 0.3 -- 12 32 Unit V V A A V V A mA SWITCHING CHARACTERISTICS Symbol t1 t3 t4 t5 t6 t7 Parameter Output Frequency Duty Cycle = t2 / t1 Rise Time Fall Time Output to Output Skew Delay, REF Rising Edge to CLKOUT Rising Edge Device-to-Device Skew (1,2) Conditions 15pF Load Measured at VDD/2, FOUT = 66.66MHz Measured between 0.7V and 1.7V Measured between 0.7V and 1.7V All outputs equally loaded Measured at VDD/2 Measured at VDD/2 on the CLKOUT pins of devices Min. 10 40 -- -- -- -- -- Typ. -- 50 -- -- -- 0 0 Max. 133 60 2.5 2.5 250 8.7 700 Unit MHz % ns ns ps ns ps NOTES: 1. REF Input has a threshold voltage of VDD/2. 2. All parameters specified with loaded outputs. 3 IDT2305NZT 2.5V CLOCK BUFFER COMMERCIAL TEMPERATURE RANGE TEST CIRCUIT VDD 0.1F OUTPUTS CLKOUT CLOAD VDD 0.1F GND GND Test Circuit for All Parameters SWITCHING WAVEFORMS t1 t2 VDD/2 VDD/2 VDD/2 Output Output VDD/2 VDD/2 t5 Duty Cycle Timing Output to Output Skew Output 0.7V t3 1.7V 1.7V 0.7V t4 2.5V 0V REF Output t6 VDD/2 VDD/2 All Outputs Rise/Fall Time Input to Output Propagation Delay CLKOUT Device 1 CLKOUT Device 2 VDD/2 t7 VDD/2 Device to Device Skew 4 IDT2305NZT 2.5V CLOCK BUFFER COMMERCIAL TEMPERATURE RANGE ORDERING INFORMATION IDT XXXXX Device Type XX Package X Process Blank DC DCG 2305NZT-1 Commercial (0oC to +70oC) Small Outline SOIC - Green 2.5V Clock Buffer 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 for Tech Support: clockhelp@idt.com 5 |
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