IDT2305NZT IDT | Alldatasheet
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COMMERCIAL TEMPERATURE RANGE IDT2305NZT 2.5V CLOCK BUFFER JUNE 2006 2006 Integrated Device Technology, Inc. DSC 7020/4c COMMERCIAL TEMPERATURE RANGE The IDT logo is a registered trademark of Integrated Device Technology, Inc. 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 V DD Available in SOIC package FUNCTIONAL BLOCK DIAGRAM IDT2305NZT2.5V CLOCK BUFFER CLK1 CLK2 CLK3 CLK4 Control LogicREF 1 CLKOUT 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.
COMMERCIAL TEMPERATURE RANGE IDT2305NZT 2.5V CLOCK BUFFER REF CLK1 CLK2 GND CLKOUT CLK4 VDD CLK3 PIN CONFIGURATION SOIC TOP VIEW Symbol Rating Max. Unit VDD 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 (except REF) V DD+0.5 IIK (VI < 0) Input Clamp Current –50 mA IO (VO = 0 to VDD) Continuous Output Current ±50 mA VDD or GND Continuous Current ±100 mA TA = 55°C Maximum Power Dissipation 0.7 W (in still air)(3) TSTG Storage Temperature Range –65 to +150 ° C Operating Commercial Temperature 0 to +70 ° C Temperature Range NOTES: 1. Weak pull down. 2. Weak pull down on all outputs. PIN DESCRIPTION ABSOLUTE MAXIMUM RATINGS(1) APPLICATIONS: SDRAM Telecom Datacom PC Motherboards/Workstations Critical Path Delay Designs Pin Name Pin Number Type Functional Description REF(1) 1 IN Input reference clock, 3.3V tolerant input CLK2(2) 2 OUT Output clock CLK1(2) 3 OUT Output clock GND 4 GND Ground CLK3(2) 5 OUT Output clock VDD 6 PWR 2.5V Supply CLK4(2) 7 OUT Output clock CLKOUT (2) 8 OUT Output clock 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 150°C and a board trace length of 750 mils.
COMMERCIAL TEMPERATURE RANGE IDT2305NZT 2.5V CLOCK BUFFER Symbol Parameter Min. Max. Unit VDD Supply Voltage 2.3 2.7 V TA Operating Temperature (Ambient Temperature) 0 +70 °C CL Load Capacitance 10MHz - 133MHz — 15 pF CIN Input Capacitance — 7 pF OPERATING CONDITIONS DC ELECTRICAL CHARACTERISTICS Symbol Parameter Conditions Min. Max. Unit VIL Input LOW Voltage Level — 0.7 V VIH Input HIGH Voltage Level 1.7 — V IIL Input LOW Current V IN = 0V — 50 µ A IIH Input HIGH Current V IN = VDD — 100 µ A VOL Output LOW Voltage Standard Drive, I OL = 8mA — 0.3 V VOH Output HIGH Voltage Standard Drive, I OH = -8mA 2 — V IDD_PD Power Down Current REF = 0MHz — 12 µ A IDD Supply Current Unloaded Outputs at 66.66MHz — 32 mA SWITCHING CHARACTERISTICS (1,2) Symbol Parameter Conditions Min. Typ. Max. Unit t1 Output Frequency 15pF Load 10 — 133 MHz Duty Cycle = t 2 ÷ t1 Measured at VDD/2, FOUT = 66.66MHz 40 50 60 % t3 Rise Time Measured between 0.7V and 1.7V — — 2.5 ns t4 Fall Time Measured between 0.7V and 1.7V — — 2.5 ns t5 Output to Output Skew All outputs equally loaded — — 250 ps t6 Delay, REF Rising Edge to CLKOUT Rising Edge Measured at V DD/2 — 0 8.7 ns t7 Device-to-Device Skew Measured at V DD/2 on the CLKOUT pins of devices — 0 700 ps NOTES: 1. REF Input has a threshold voltage of V DD/2. 2. All parameters specified with loaded outputs.
COMMERCIAL TEMPERATURE RANGE IDT2305NZT 2.5V CLOCK BUFFER VDD OUTPUTS VDD GND GND 0.1μF 0.1μF CLOAD CLKOUT Test Circuit for All Parameters TEST CIRCUIT Output VDD/2 VDD/2 Output REF VDD/2 Output CLKOUT Device 1 CLKOUT Device 2 VDD/2 VDD/2 VDD/2 VDD/2VDD/2 VDD/2 1.7V0.7V t3 t4 0.7V 2.5V 1.7VOutput All Outputs Rise/Fall Time Input to Output Propagation Delay Device to Device Skew Output to Output SkewDuty Cycle Timing SWITCHING WAVEFORMS
COMMERCIAL TEMPERATURE RANGE IDT2305NZT 2.5V CLOCK BUFFER
ORDERING INFORMATION
Package ProcessDevice Type 2305NZT-1 DC DCG Blank 2.5V Clock Buffer Small Outline SOIC - Green Commercial (0oC to +70oC) CORPORATE HEADQUARTERS for SALES: for Tech Support: 6024 Silver Creek Valley Road 800-345-7015 or 408-284-8200 clockhelp@idt.com San Jose, CA 95138 fax: 408-284-2775 www.idt.com