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Details, datasheet, quote on part number:2305
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| Part: | 2305 |
| Category: | Timing Circuits => PLL (Phase locked loop) |
| Description: | 3.3V Zero Delay Clock Buffer |
| Company: | Integrated Device Technology, Inc. |
| Datasheet: | Download 2305 datasheet File size : 381 kB |
| Request For quote: | Find where to buy 2305
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Datasheet text preview:
IDT2305 3.3V ZERO DELAY CLOCK BUFFER
COMMERCIALAND INDUSTRIAL TEMPERATURE RANGES
3.3V ZERO DELAY CLOCK BUFFER
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 < 200ps cycle-to-cycle IDT2305-1 for Standard Drive IDT2305-1H for High Drive Industrial Temperature Available No external RC network required Operates at 3.3V VDD Available in SOIC package Power Down Mode
IDT2305
DESCRIPTION:
The IDT2305 is a high-speed phase-lock loop (PLL) clock buffer, 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. The IDT2305 is an 8-pin version of the IDT2309. IDT2305 accepts one 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 25µA, the outputs are tri-stated, 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 CLKOU T
P LL REF 1 C o n tr o l L o g ic
3
CLK1
2
CLK2
5
CLK3
7 CLK4
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
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c 2001 Integrated Device Technology, Inc.
APRIL 2001
DSC-5174/2
IDT2305 3.3V ZERO DELAY CLOCK BUFFER
COMMERCIALAND INDUSTRIAL TEMPERATURE RANGES
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
Symbol VDD VI (2) VI IIK (VI < 0) Rating Supply Voltage Range Input Voltage Range (REF) Input Voltage Range (except REF) Input Clamp Current Continuous Current Maximum Power Dissipation Storage Temperature Range Commercial Temperature Range Industrial Temperature Range
(1)
Unit V V V mA mA mA W °C °C °C
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 -40 to +85
REF C LK 2 C LK 1 GND
1 2 3 4 S O 8 -1
8 7 6 5
C LK O U T C LK 4 V DD C LK 3
IO (VO = 0 to VDD) Continuous Output Current VDD or GND TA = 55°C (in still air) (3) TSTG
SOIC TOP VIEW
Operating Temperature Operating Temperature
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) CLK2(2) CLK1(2) GND CLK3(2) VDD CLK4(2) CLKOUT(2)
NOTES: 1. Weak pull down. 2. Weak pull down on all outputs.
Pin Number 1 2 3 4 5 6 7 8 IN Out Out Ground Out PWR Out Out
Type Output clock Output clock Ground Output clock 3.3V Supply Output clock
Functional Description Input reference clock, 5 Volt tolerant input
Output clock, internal feedback on this pin
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IDT2305 3.3V ZERO DELAY CLOCK BUFFER
COMMERCIALAND INDUSTRIAL TEMPERATURE RANGES
OPERATING CONDITIONS - COMMERCIAL
Sym b o l VDD TA CL C IN P a r a m e te r Supply Voltage Operating Temperature (Ambient Temperature) Load Capacitance < 100MHz Load Capacitance 100 - 133MHz Input Capacitance M in . 3 0 -- -- -- M ax. 3.6 70 30 10 7 pF Un it V
°C
pF
DC ELECTRICAL CHARACTERISTICS - COMMERCIAL
Sym bol V IL V IH I IL I IH VOL VOH ID D _P D ID D P a r a m e te r Input LOW Voltage Level Input HIGH Voltage Level Input LOW Current Input HIGH Current Output LOW Voltage Output HIGH Voltage Power Down Supply Current Supply Current VIN = 0V VIN = VDD Standard Drive High Drive Standard Drive High Drive REF = 0MHz Unloaded outputs at 66.66 MHz IOL = 8mA IOL = 12mA (- 1H) IOH = -8mA IOH = -12mA (- 1H) -- -- 12 32 µA mA 2 .4 -- V C o n d i ti o n s M in . -- 2 -- -- -- Max. 0 .8 -- 50 100 0.4 U n it V V µA µA V
SWITCHING CHARACTERISTICS (IDT2305-1) - COMMERCIAL
(1, 2)
Sym bol t1
P a r a m e te r Output Frequency Duty Cycle = t2 ÷ t1 10pF Load 30pF Load
C o n d i ti o n s
M in . 10 10 40 -- -- -- -- -- -- --
Typ. -- -- 50 -- -- -- 0 0 -- --
Max. 133 100 60 2.5 2.5 250 ±350 700 200 1
U n it M Hz % ns ns ps ps ps ps ms
Measured at 1.4V, FOUT = 66.66MHz Measured between 0.8V and 2V Measured between 0.8V and 2V All outputs equally loaded Measured at VDD/2 Measured at VDD/2 on the CLKOUT pins of devices Measured at 66.66MHz, loaded outputs Stable power supply, valid clock presented on REF pin
t3 t4 t5 t6 t7 tJ tLOCK
Rise Time Fall Time Output to Output Skew Delay, REF Rising Edge to CLKOUT Rising Edge Device-to-Device Skew Cycle-to-Cycle Jitter, pk - pk PLL Lock Time
NOTES: 1. REF Input has a threshold voltage of VDD/2. 2. All parameters specified with loaded outputs.
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IDT2305 3.3V ZERO DELAY CLOCK BUFFER
COMMERCIALAND INDUSTRIAL TEMPERATURE RANGES
S W IT C H IN G CHARACTERISTICS (IDT2305-1H) - COMMERCIAL
( 1 , 2)
S ym b o l t1
P a r a m e te r O u tp u t Frequency D u ty Cycle = t2 ÷ t1 D u ty Cycle = t2 ÷ t1 10 p F Load 30 p F Load
C o n d itio n s
M in . 10 10 40 45 -- -- -- -- -- 1 -- --
T yp . -- -- 50 50 -- -- -- 0 0 -- -- --
M ax. 133 100 60 55 1 .5 1 .5 250 ±350 700 -- 200 1
U n it MHz % % ns ns ps ps ps V /n s ps ms
M e a s u re d at 1.4V, FOUT = 66.66MHz M e a s u re d at 1.4V, FOUT <50MHz M e a s u re d between 0.8V and 2V M e a s u re d between 0.8V and 2V A ll outputs equally loaded M e a s u re d at VDD/2 M e a s u re d at VDD/2 on the CLKOUT pins of devices M e a s u re d between 0.8V and 2V using Test Circuit #2 M e a s u re d at 66.66MHz, loaded outputs S ta b le power supply, valid clock presented on REF pin
t3 t4 t5 t6 t7 t8 tJ tLOCK
R ise Time F a ll Time O u tp u t to Output Skew D e la y , REF Rising Edge to CLKOUT Rising Edge D e v ic e -to -D e vic e Skew O u tp u t Slew Rate C y c le -to -C y c le Jitter, pk - pk P L L Lock Time
NOTES: 1. REF Input has a threshold voltage of VDD/2. 2. All parameters specified with loaded outputs.
OPERATING CONDITIONS - INDUSTRIAL
Symbol VDD TA CL CIN Parameter Supply Voltage Operating Temperature (Ambient Temperature) Load Capacitance < 100MHz Load Capacitance 100 - 133MHz Input Capacitance Min. 3 -40 -- -- -- Max. 3.6 85 30 10 7 pF Unit V
°C
pF
DC ELECTRICAL CHARACTERISTICS - INDUSTRIAL
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 Supply Current Supply Current VIN = 0V VIN = VDD Standard Drive High Drive Standard Drive High Drive REF = 0MHz Unloaded outputs at 66.66 MHz IOL = 8mA IOL = 12mA (- 1H) IOH = -8mA IOH = -12mA (- 1H) -- -- 25 35 µA mA 2.4 -- V Conditions Min. -- 2 -- -- -- Max. 0.8 -- 50 100 0.4 Unit V V µA µA V
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IDT2305 3.3V ZERO DELAY CLOCK BUFFER
COMMERCIALAND INDUSTRIAL TEMPERATURE RANGES
(1,
S W IT C H IN G CHARACTERISTICS (IDT2305-1) - INDUSTRIAL
2)
S ym b o l t1
P a r a m e te r O u tp u t Frequency D u ty Cycle = t2 ÷ t1 1 0 p F Load 30 p F Load
C o n d itio n s
M in . 10 10 40 -- -- -- -- -- -- --
T yp . -- -- 50 -- -- -- 0 0 -- --
M ax. 133 100 60 2 .5 2 .5 250 ±350 700 200 1
U n it MHz % ns ns ps ps ps ps ms
M e a s u re d at 1.4V, FOUT = 66.66MHz M e a s u re d between 0.8V and 2V M e a s u re d between 0.8V and 2V A ll outputs equally loaded M e a s u re d at VDD/2 M e a s u re d at VDD/2 on the CLKOUT pins of devices M e a s u re d at 66.66MHz, loaded outputs S ta b le power supply, valid clock presented on REF pin
t3 t4 t5 t6 t7 tJ tLOCK
R ise Time F a ll Time O u tp u t to Output Skew D e la y , REF Rising Edge to CLKOUT Rising Edge D e v ic e -to -De v ic e Skew C y c le -to -C y cle Jitter, pk - pk P L L Lock Time
S W IT C H IN G CHARACTERISTICS (IDT2305-1H) - INDUSTRIAL
( 1 , 2)
S ym b o l t1
P a r a m e te r O u tp u t Frequency D u ty Cycle = t2 ÷ t1 D u ty Cycle = t2 ÷ t1 1 0 p F Load 30 p F Load
C o n d itio n s
M in . 10 10 40 45 -- -- -- -- -- 1 -- --
T yp . -- -- 50 50 -- -- -- 0 0 -- -- --
M ax. 133 100 60 55 1 .5 1 .5 250 ±350 700 -- 200 1
U n it MHz % % ns ns ps ps ps V /n s ps ms
M e a s u re d at 1.4V, FOUT = 66.66MHz M e a s u re d at 1.4V, FOUT <50MHz M e a s u re d between 0.8V and 2V M e a s u re d between 0.8V and 2V A ll outputs equally loaded M e a s u re d at VDD/2 M e a s u re d at VDD/2 on the CLKOUT pins of devices M e a s u re d between 0.8V and 2V using Test Circuit #2 M e a s u re d at 66.66MHz, loaded outputs S ta b le power supply, valid clock presented on REF pin
t3 t4 t5 t6 t7 t8 tJ tLOCK
R ise Time F a ll Time O u tp u t to Output Skew D e la y , REF Rising Edge to CLKOUT Rising Edge D e v ic e -to -De v ic e Skew O u tp u t Slew Rate C y c le -to -C y cle Jitter, pk - pk P L L Lock Time
NOTES: 1. REF Input has a threshold voltage of VDD/2. 2. All parameters specified with loaded outputs.
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