IDT2305-1 IDT [Integrated Device Technology], IDT2305-1 Datasheet

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IDT2305-1

Manufacturer Part Number
IDT2305-1
Description
3.3V ZERO DELAY CLOCK BUFFER
Manufacturer
IDT [Integrated Device Technology]
Datasheet

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FEATURES:
• Phase-Lock Loop Clock Distribution
• 10MHz to 133MHz operating frequency
• Distributes one clock input to one bank of five outputs
• Zero Input-Output Delay
• Output Skew < 250ps
• Low jitter <200 ps cycle-to-cycle
• IDT2305-1 for Standard Drive
• IDT2305-1H for High Drive
• No external RC network required
• Operates at 3.3V V
• Power down mode
• Available in SOIC package
FUNCTIONAL BLOCK DIAGRAM
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
IDT2305
3.3V ZERO DELAY CLOCK BUFFER
c
2007
REF
Integrated Device Technology, Inc.
1
DD
PLL
3.3V ZERO DELAY
CLOCK BUFFER
Control
Logic
1
DESCRIPTION:
designed to address high-speed clock distribution 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.
reference input, and drives out five low skew clocks. The -1H version of this
device operates, up to 133MHz frequency and has a higher drive than the
-1 device. All parts have on-chip PLLs which lock to an input clock on the
REF pin. The PLL feedback is on-chip and is obtained from the CLKOUT
pad. In the absence of an input clock, the IDT2305 enters power down. In
this mode, the device will draw less than 25
and the PLL is not running, resulting in a significant reduction of power.
operation.
The IDT2305 is a high-speed phase-lock loop (PLL) clock buffer,
The IDT2305 is an 8-pin version of the IDT2309. IDT2305 accepts one
The IDT2305 is characterized for both Industrial and Commercial
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
μA,
DECEMBER 2007
8
3
2
the outputs are tri-stated,
5
7
CLK1
CLKOUT
CLK2
CLK3
CLK4
IDT2305
DSC 5174/8

Related parts for IDT2305-1

IDT2305-1 Summary of contents

Page 1

... Distributes one clock input to one bank of five outputs • Zero Input-Output Delay • Output Skew < 250ps • Low jitter <200 ps cycle-to-cycle • IDT2305-1 for Standard Drive • IDT2305-1H for High Drive • No external RC network required • Operates at 3. • Power down mode • ...

Page 2

... IDT2305 3.3V ZERO DELAY CLOCK BUFFER PIN CONFIGURATION 1 REF CLK2 2 3 CLK1 GND 4 SOIC TOP VIEW APPLICATIONS: • SDRAM • Telecom • Datacom • PC Motherboards/Workstations • Critical Path Delay Designs PIN DESCRIPTION Pin Name Pin Number REF (1) 1 CLK2 (2) 2 CLK1 (2) 3 GND ...

Page 3

... IDT2305 3.3V ZERO DELAY CLOCK BUFFER OPERATING CONDITIONS - COMMERCIAL Symbol Parameter V Supply Voltage DD T Operating Temperature (Ambient Temperature Load Capacitance < 100MHz L Load Capacitance 100MHz - 133MHz C Input Capacitance IN DC ELECTRICAL CHARACTERISTICS - COMMERCIAL Symbol Parameter V Input LOW Voltage Level IL V Input HIGH Voltage Level ...

Page 4

... IDT2305 3.3V ZERO DELAY CLOCK BUFFER SWITCHING CHARACTERISTICS (2305-1H) - COMMERCIAL Symbol Parameter t Output Frequency 1 ÷ t Duty Cycle = ÷ t Duty Cycle = Rise Time 3 t Fall Time 4 t Output to Output Skew 5 t Delay, REF Rising Edge to CLKOUT Rising Edge 6 t Device-to-Device Skew ...

Page 5

... IDT2305 3.3V ZERO DELAY CLOCK BUFFER SWITCHING CHARACTERISTICS (2305-1) - INDUSTRIAL Symbol Parameter t Output Frequency 1 ÷ t Duty Cycle = Rise Time 3 t Fall Time 4 t Output to Output Skew 5 t Delay, REF Rising Edge to CLKOUT Rising Edge 6 t Device-to-Device Skew 7 t Cycle-to-Cycle Jitter ...

Page 6

... IDT2305 3.3V ZERO DELAY CLOCK BUFFER ZERO DELAY AND SKEW CONTROL All outputs should be uniformly loaded in order to achieve Zero I/O Delay. Since the CLKOUT pin is the internal feedback for the PLL, its relative loading can affect and adjust the input/output delay. The Output Load Difference diagram illustrates the PLL's relative loading with respect to the other outputs that can adjust the Input-Output (I/O) Delay ...

Page 7

... IDT2305 3.3V ZERO DELAY CLOCK BUFFER SWITCHING WAVEFORMS t1 t2 1.4V 1.4V Duty Cycle Timing 2V 0.8V 0.8V 2V Output t3 All Outputs Rise/Fall Time TEST CIRCUITS V DD μ 0.1 F OUTPUTS V DD μ 0.1 F GND GND Test Circuit 1 (all Parameters Except t8) COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES Output 1.4V Output 3.3V REF 0V t4 Output ...

Page 8

... Number of Loaded Outputs NOTES: 1. Duty Cycle is taken from typical chip measured at 1.4V data is calculated from nCVf, where CORE V = Supply Voltage (V Frequency (Hz)) COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES AND I TRENDS FOR IDT2305-1 (1) ( 33M 66M H z 100M Hz 48 ...

Page 9

... Duty Cycle is taken from typical chip measured at 1.4V data is calculated from IDD = ICORE + nCVf, where ICORE is the unloaded current Number of outputs Capacitance load per output (F Supply Voltage (V Frequency (Hz)) COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES AND I TRENDS FOR IDT2305-1H (1) ( ...

Page 10

... IDT2305 3.3V ZERO DELAY CLOCK BUFFER PACKAGE OUTLINE AND PACKAGE DIMENSIONS - SOIC N INDEX AREA 150 mil (Narrow Body) SOIC In Millimeters COMMON DIMENSIONS SYMBOL MIN MAX A 1.35 1.75 A1 0.10 0.25 B 0.33 0.51 C 0.19 0.25 D SEE VARIATIONS E 3.80 4.00 e 1.27 BASIC H 5.80 6.20 h 0.25 0.50 L 0.40 1.27 N SEE VARIATIONS α 0° 8° NOTE: 1. For reference only. Controlling dimensions are in mm. ...

Page 11

... IDT2305 3.3V ZERO DELAY CLOCK BUFFER ORDERING INFORMATION IDT XXXXX XX Package Device Type Ordering Code IDT2305-1DC IDT2305-1DCG IDT2305-1DCI IDT2305-1DCGI IDT2305-1HDC IDT2305-1HDCI CORPORATE HEADQUARTERS 6024 Silver Creek Valley Road San Jose, CA 95138 X Process Blank I DC DCG 2305-1 2305-1H Package Type 8-Pin SOIC 8-Pin SOIC ...

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