IDT2305 3.3V ZERO DELAY CLOCK BUFFER COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES 3.3V ZERO DELAY IDT2305 CLOCK BUFFER FEATURES: DESCRIPTION: Phase-Lock Loop Clock Distribution The IDT2305 is a high-speed phase-lock loop (PLL) clock buffer, 10MHz to 133MHz operating frequency designed to address high-speed clock distribution applications. The zero Distributes one clock input to one bank of five outputs delay is achieved by aligning the phase between the incoming clock and Zero Input-Output Delay the output clock, operable within the range of 10 to 133MHz. Output Skew < 250ps The IDT2305 is an 8-pin version of the IDT2309. IDT2305 accepts one Low jitter <200 ps cycle-to-cycle reference input, and drives out five low skew clocks. The -1H version of this IDT2305-1 for Standard Drive device operates, up to 133MHz frequency and has a higher drive than the IDT2305-1H for High Drive -1 device. All parts have on-chip PLLs which lock to an input clock on the No external RC network required REF pin. The PLL feedback is on-chip and is obtained from the CLKOUT Operates at 3.3V VDD pad. In the absence of an input clock, the IDT2305 enters power down. In Power down mode this mode, the device will draw less than 25A, the outputs are tri-stated, Available in SOIC/TSSOP packages and the PLL is not running, resulting in a significant reduction of power. The IDT2305 is characterized for both Industrial and Commercial operation. FUNCTIONAL BLOCK DIAGRAM 8 CLKOUT 3 CLK1 PLL 1 Control REF Logic 2 CLK2 5 CLK3 7 CLK4 COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES AUGUST 2012 1 c 2012 Integrated Device Technology, Inc. DSC 5174/8IDT2305 3.3V ZERO DELAY CLOCK BUFFER COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES (1) PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS Symbol Rating Max. Unit VDD Supply Voltage Range 0.5 to +4.6 V (2) VI Input Voltage Range (REF) 0.5 to +5.5 V REF 1 8 CLKOUT VI Input Voltage Range 0.5 to V CLK2 CLK4 2 7 (except REF) VDD+0.5 IIK (VI < 0) Input Clamp Current 50 mA VDD 3 6 CLK1 IO (VO = 0 to VDD) Continuous Output Current 50 mA GND 4 5 CLK3 VDD or GND Continuous Current 100 mA TA = 55C Maximum Power Dissipation 0.7 W (3) (in still air) TSTG Storage Temperature Range 65 to +150 C SOIC/TSSOP Operating Commercial Temperature 0 to +70 C TOP VIEW Temperature Range Operating Industrial Temperature -40 to +85 C 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 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 Pin Number Type Functional Description REF 1 I N Input reference clock, 5 Volt tolerant input (1) CLK2 2 Out Output clock (1) CLK1 3 Out Output clock GND 4 Ground Ground (1) CLK3 5 Out Output clock VDD 6 PWR 3.3V Supply (1) CLK4 7 Out Output clock (1) CLKOUT 8 Out Output clock, internal feedback on this pin NOTES: 1. Weak pull down on all outputs. 2