IDT2305NZT 2.5V CLOCK BUFFER COMMERCIAL TEMPERATURE RANGE IDT2305NZT 2.5V CLOCK BUFFER FEATURES: 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. 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 FUNCTIONAL BLOCK DIAGRAM 8 CLKOUT 3 REF 1 CLK1 Control Logic 2 5 CLK2 CLK3 7 CLK4 The IDT logo is a registered trademark of Integrated Device Technology, Inc. COMMERCIAL TEMPERATURE RANGE JUNE 2006 1 c 2006 Integrated Device Technology, Inc. DSC 7020/4 IDT2305NZT 2.5V CLOCK BUFFER COMMERCIAL TEMPERATURE RANGE ABSOLUTE MAXIMUM RATINGS(1) PIN CONFIGURATION Symbol REF 1 8 CLKOUT CLK2 2 7 CLK4 CLK1 3 6 VDD GND 4 5 CLK3 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) IIK (VI < 0) Input Clamp Current VDD+0.5 –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 TSTG Storage Temperature Range –65 to +150 °C Operating Commercial Temperature 0 to +70 °C Temperature Range (in still air)(3) 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 150°C 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 Type Functional Description 1 IN CLK2(2) 2 OUT Output clock (2) 3 OUT Output clock 4 GND Ground 5 OUT Output clock 6 PWR 2.5V Supply 7 OUT Output clock 8 OUT Output clock CLK1 GND CLK3 (2) VDD CLK4 (2) CLKOUT (2) Input reference clock, 3.3V tolerant input NOTES: 1. Weak pull down. 2. Weak pull down on all outputs. 2 IDT2305NZT 2.5V CLOCK BUFFER COMMERCIAL TEMPERATURE RANGE OPERATING CONDITIONS Symbol Parameter VDD Supply Voltage Min. Max. Unit 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 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 VIN = 0V — 50 µA IIH Input HIGH Current VIN = VDD — 100 µA VOL Output LOW Voltage Standard Drive, IOL = 8mA — 0.3 V VOH Output HIGH Voltage Standard Drive, IOH = -8mA 2 — V IDD_PD Power Down Current REF = 0MHz — 12 µA Supply Current Unloaded Outputs at 66.66MHz — 32 mA IDD (1,2) SWITCHING CHARACTERISTICS Symbol t1 Parameter Output Frequency Conditions 15pF Load Min. Typ. Max. Unit 10 — 133 MHz Duty Cycle = t2 ÷ 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 VDD/2 — 0 8.7 ns t7 Device-to-Device Skew Measured at VDD/2 on the CLKOUT pins of devices — 0 700 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 0.1μF CLKOUT OUTPUTS CLOAD VDD 0.1μF GND GND Test Circuit for All Parameters SWITCHING WAVEFORMS t1 Output VDD/2 t2 VDD/2 VDD/2 VDD/2 VDD/2 Output t5 Output to Output Skew Duty Cycle Timing Output 0.7V t3 1.7V 1.7V 0.7V 2.5V VDD/2 REF 0V t4 VDD/2 Output t6 Input to Output Propagation Delay All Outputs Rise/Fall Time 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 Commercial (0oC to +70oC) DC DCG Small Outline SOIC - Green 2305NZT-1 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 5 for Tech Support: [email protected]