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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI6C2408
Zero-Delay Clock Buffer
Features
* * * * * * * * * Maximum rated frequency: 140 MHz Low cycle-to-cycle jitter Input to output delay, less than 150ps External feedback pin allows outputs to be synchronized to the clock input 5V tolerant input* Operates at 3.3V VDD Test mode allows bypass of the PLL for system testing purposes (e.g., IBIS measurements) Clock frequency multipliers 1/2x to 4x dependent on option Packaging (Pb-free and Green available): -16-pin, 150-mil SOIC (W) -16-pin 173-mil TSSOP (L)
Description
The PI6C2408 is a PLL-based, zero-delay buffer, with the ability to distribute eight outputs of up to 140 MHz at 3.3 V. Two banks of four outputs exist, and, depending on product option ordered, can supply either reference frequency, prescaled half frequency, or multiplied 2x or 4x input clock frequencies. The PI6C2408 family has a power-sparing feature: when input SEL2 is 0, the component will 3-state one or both banks of outputs depending on the state of input SEL1. A PLL bypass test mode also exists. This product line is available in high-drive and industrial environment versions. An external feedback pin is used to synchronize the outputs to the input; the relationship between loading of this signal and the other outputs determines the input-output delay. The PI6C2408 is characterized for both commercial and industrial operation.
* FB_IN and CLKIN must reference the same voltage thresholds for the PLL to deliver zero delay skewing
Block Diagram
FB_IN CLKIN /2 PLL
Pin Configuration
MUX OUTA1 OUTA2 OUTA3 OUTA4 /2 OUTB1 Option (-2, -3) OUTB2 OUTB3 OUTB4
Option (-3, -4) SEL1 SEL2 Decode Logic
PI6C2408 (-1, -1H, -2, -3, -4)
CLKIN OUTA1 OUTA2 VDD GND OUTB1 OUTB2 SEL2
16 1 15 2 14 3 16-Pin 13 4 5 W, L 12 11 6 10 7 9 8
FB_IN OUTA4 OUTA3 VDD GND OUTB4 OUTB3 SEL1
FB_IN CLKIN
PLL
MUX
OUTA1 OUTA2 OUTA3
SEL2 SEL1
Decode Logic /2 MUX
OUTA4
PI6C2408-6
OUTB1 OUTB2 OUTB3 OUTB4
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PI6C2408 Zero Delay Clock Buffer
Input Select Decoding for PI6C2408 (-1, -1H,-4)
SEL2 0 0 1 1 SEL1 0 1 0 1 OUTA [1-4] 3- State PLL CLKIN PLL OUTB [1-4] 3- State 3- State CLKIN PLL Output Source PLL PLL CLKIN PLL PLL O FF ON O FF ON
Input Select Decoding for PI6C2408 (-2,-3)
SEL2 0 0 1 1 SEL1 0 1 0 1 OUTA [1-4] 3- State PLL CLKIN PLL OUTB [1-4] 3- State 3- State CLKIN/2 PLL Output Source PLL PLL CLKIN PLL PLL O FF ON O FF ON
Input Select Decoding for PI6C2408-6
SEL2 0 0 1 1 SEL1 0 1 0 1 OUTA [1-4] 3- State CLKIN PLL PLL OUTB [1-4] 3- State CLKIN/2 PLL PLL/2 Output Source PLL CLKIN PLL PLL PLL O FF O FF ON ON
PI6C2408 Configurations
De vice PI6C2408- 1 PI6C2408- 1H PI6C2408- 2 PI6C2408- 2 PI6C2408- 3 PI6C2408- 3 PI6C2408- 4 PI6C2408- 6 PI6C2408- 6 Fe e dback From OUTA or OUTB OUTA or OUTB OUTA OUTB OUTA OUTB OUTA or OUTB OUTA OUTB OUTA [1-4] Fre que ncy CLKIN CLKIN CLKIN 2X CLKIN 2X CLKIN 4X CLKIN 2X CLKIN CLKIN CLKIN or 2X CLKIN OUTB [1-4] Fre que ncy CLKIN CLKIN CLKIN/2 CLKIN CLKIN or CLKIN( 1 ) 2X CLKIN 2XCLKIN CLKIN or CLKIN/2 CLKIN
Note: 1. Output phase is indeterminant (0 or 180 from CLKIN)
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CLKIN - Input to OUTA/OUTB Delay (ps)
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PI6C2408 Zero Delay Clock Buffer
Pin Description
Pin 1 2, 3, 14, 15 4, 13 5, 12 6, 7, 10 ,11 8 9 16 C LK IN O UTA[1- 4] VDD GN D O UTB[1- 4] SEL2 SEL1 FB_IN Signal D e s cription Input clock reference frequency (weak pull- down) C lock output, Bank A (weak pull- down) 3.3V supply Ground C lock output, Bank B (weak pull- down) Select input, bit 2 (weak pull- up) Select input, bit 1 (weak pull- up) PLL feedback input
Zero Delay and Skew Control
CLKIN Input to Output Bank Delay vs. Difference in Loading between FB_IN pin and OUTA/OUTB pins
800 600 400 200 0 -200 -400 -600 -800 -900 Output Load Difference: FB_IN Load - OUTA/OUTB Load (pF) PI6C2408-1,2,3,4,6 PI6C2408-1H
-25 -20 -15 -10 -5 0 5 10 15 20 25
-1000
The relationship between loading of the FB_IN signal and other outputs determines the input-output delay. Zero delay is achieved when all outputs, including feedback, are loaded equally.
Maximum Ratings
Supply Voltage to Ground Potential ............................................................................................................................. -0.5V to +7.0V DC Input Voltage (Except CLKIN) ........................................................................................................................ -0.5V to VDD +0.5V DC Input Voltage CLKIN ...................................................................................................................................................... -0.5 to 7V Storage Temperature ................................................................................................................................................... -65C to +150C Maximum Soldering Temperature (10 seconds) ........................................................................................................................... 260C Junction Temperature .................................................................................................................................................................. 150C Static Discharge Voltage (per MIL-STD-883, Method 3015) .................................................................................................... >2000V
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PS8589E
09/15/04
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PI6C2408 Zero Delay Clock Buffer
Operating Conditions (VCC = 3.3V 0.3V)
Parame te r VDD TA CL C IN Supply Voltage Commerical Operating Temperature Industrial Operating Temperature Load Capacitance, below 100 MHz Load Capacitance, from 100 MHz to 140MHz Input Capacitance De s cription M in. 3.0 0 -40 M a x. 3.6 70 85 30 15 7 pF Units V C
DC Electrical Characteristics for Industrial Temperature Devices
Parame te r VIL VIH IIL IIH VOL VOH IDD (PD mode) IDD De s cription Input LOW Voltage Input HIGH Voltage Input LOW Current Input HIGH Current Output LOW Voltage Output HIGH Voltage Pwr Dwn Supply Current Supply Current VIN = 0V VIN = VDD IOL = 8mA (-1, -2, -3,-4, -6); IOL = 12mA (-1H) IOH = -8mA (-1, -2, -3,-4, -6); IOH = -12mA (-1H) SEL1 = 0 (-1, -2, -3, -4, -1H); SEL2 = 0 (-6) Unloaded outputs 100 MHz, Select inputs at VDD or GND Unloaded outputs 66 MHz, CLKIN, except (-1H) Unloaded outputs 33MHz, CLKIN, except (-1H) 2.4 25.0 54.0 70.0 (-1H) 39.0 20.0 mA 2.0 50.0 100.0 0.4 Te s t Conditions M in. M a x. 0.8 Units V
A
V A
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PS8589E
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PI6C2408 Zero Delay Clock Buffer
AC Elecrical Characteristics for Industrial Temperature Devices
Parame te rs FO tDC N ame O utput Frequency Duty C ycle(1 ) (-1, -2, -3, -4, -6) Duty C ycle(1 ) (-1H) 30pF load 15pF load Measured at VDD/2, FO UT <66.67MHz 30pF load Measured at VDD/2, FO UT <140 MHz 15pF load Measured at VDD/2, FO UT <45 MHz 30pF load Measured at VDD/2, FO UT <66.67MHz 30pF load Measured at VDD/2, FO UT <140 MHz 15pF load Measured at VDD/2, FO UT <45MHz 30pF load tR Rise Rise tF Time(1 ) Time(1 ) (-1, -2, -3, -4,) (-1H) Measured between 0.8V and 2.0V, 30pF load Measured between 0.8V and 2.0V, 15pF load Measured between 0.8V and 2.0V, 30pF load Measured between 0.8V and 2.0V, 30pF load Measured between 0.8V and 2.0V, 15pF load Fall Time(1 ) tS K (O ) (-1H) Measured between 0.8V and 2.0V, 30pF load All outputs equally loaded 200 O utput to O utput Skew within same Bank (-1,-2,-3,-4,-6)(1 ) O UTA to O UTB (-1,-1H,-4) Skew(1 ) 400 Measured at VDD/2 Measured at VDD/2 on FB_IN pins of devices Measured between 0.8V & 2.0V on -1H device using Test C rt #2 Measured at 66.67 MHz, loaded 30pF load Measured at 140 MHz, loaded 15pF load Measured at 66.67 MHz, loaded 30pF load Stable power supply, valid clocks presented on C LK IN and FB_IN pins 1 200 100 400 1.0 ms ps 0 0 150 500 V/ns ps Fall Time(1 ) (-1, -2, -3, -4,) Te s t Conditions M in. 10.0 40.0 45.0 45.0 40.0 45.0 50 Typ. M ax. Units 100 140 60.0 55.0 60.0 55.0 2.2 1.50 1.50 2.50 1.50 1.25 ns % MHz
O UTA to O UTB Skew(1 ) (-2,-3,-6) t0 tS K (D) tS LEW tJIT Delay, C LK IN Rising Edge to FB_IN Rising Edge(1 ) Device- to- Device Skew(1 ) O utput Slew Rate(1 )
C ycle- to- C ycle Jitter(1) (-1,-1H,-4) C ycle- to- C ycle (-2,-3,-6) Jitter(1)
tLO C K
PLL Lock Time(1)
Notes: 1. See Switching Waveforms on page 7.
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PS8589E
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PI6C2408 Zero Delay Clock Buffer
DC Electrical Characteristics for Commercial Temperature Devices
Parame te r VIL VIH IIL IIH VOL VOH IDD (PD mode) IDD IDD De s cription Input LOW Voltage Input HIGH Voltage Input LOW Current Input HIGH Current Output LOW Voltage Output HIGH Voltage Supply Current Supply Current VIN = 0V VIN = VDD IOL = 8mA (-1, -2, -3,-4, -6); IOL = 12mA (-1H) IOH = -8mA (-1, -2, -3,-4, -6); IOH = -12mA (-1H) Unloaded outputs, 66.67 MHz, Select inputs at VDD or GND Unloaded outputs 100 MHz Select Inputs @ VDD or GND Te s t Conditions M in. 2.0 2.4 M a x. 0.8 50 100 0.4 12 39 54 Units V A V A mA
Power Down Supply Current SEL1 = 0 (- 1,- 2,- 3,- 4,- 1H); SEL2 = 0 (- 6)
AC Electrial Characteristics for Commercial Temperature Device
Parame te rs FO tDC tR N ame O utput Frequency Duty C ycle(1) (-1H) Duty C ycle (-1, -2, -3, -4, -6) Rise Time(1) @30pF Rise Time(1) @15pF Rise Time(1) @30pF (-1H) tF Fall Time(1) @30pF Fall Time(1) @15pF Fall Time(1) @30pF (-1H) tSK(O) O utput to O utput Skew(1) within same bank (-1,-1H,-2,-3,-4,-6) O UTA to O UTB Skew(1) (-2,-3,-6) t0 tSK(D) tSLEW tJIT Input to O utput Delay, C LK IN Rising Edge to FB_IN Rising Edge(1) Device to Device Skew(1) O utput Slew Rate(1) All outputs equally loaded, VDD/2 All outputs equally loaded, VDD/2 Measured at VDD/2 Measured at VDD/2 on FB_IN pins of devices Measured between 0.8V and 2.0V on -1H device using Test C ircuit #2 Measured at 66.67 MHz, loaded 30pF outputs Measured at 140 MHz, loaded 15pF outputs C ycle- to- C ycle tLOCK PLL Lock Jitter(1) (-2,-3,-6) Measured at 66.7 MHz, loaded 30pF outputs Stable power supply, valid clocks presented on C LK IN and FB_IN pins Time(1) 1 200 100 400 1.0 ms ps 0 0 Measured between 0.8V and 2.0V 30pF load 15pF load Measured at VDD/2, for high drive output Measured at VDD/2, for normal drive output 45 40 50 50 Te s t Conditions M in. 10 Typ. M ax. Units 100 140 55 60 2.2 1.5 1.5 2.2 1.5 1.25 200 200 400 150 500 V/ns ps ns MHz %
O UTA to O UTB Skew(1) (-1,-1H,-4) All outputs equally loaded, VDD/2
C ycle- to- C ycle Jitter (1)(-1,-1H,-4)
Notes: 1. See Switching Waveforms on page 7.
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PS8589E 09/15/04
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PI6C2408 Zero Delay Clock Buffer
Switching Waveforms
Duty Cycle Timing VDD/2 All Outputs Rise/Fall Time OUTPUT 2.0V 0.8V tR VDD/2 VDD/2 tSK(O) 2.0V 0.8V tF 3.3V 0V tHIGH VDD/2 tLOW VDD/2
tDC =
tHIGH tHIGH + tLOW
Output-Output Skew OUTPUT OUTPUT
Device-Device Skew OUTPUT Device 1 OUTPUT Device 2 VDD/2 VDD/2 tSK(D) Input-Output Propagation Delay INPUT FB_IN VDD/2 VDD/2 t0
0.1F
VDD OUTPUTS CLK out CLOAD
0.1F
VDD OUTPUTS VDD GND GND
1k-ohm CLK out 1k-ohm 10pF
0.1F
VDD GND GND
0.1F
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PS8589E
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PI6C2408 Zero Delay Clock Buffer
16-Pin SOIC (W) Package
16
.149 .157
3.78 3.99 .0099 .0196 0.25 x 45 0.50
1 .386 .393 9.80 10.00 .0155 .0260 0.393 0.660 REF .053 .068 1.35 1.75 SEATING PLANE 0-8 0.41 1.27 .016 .050 .0075 .0098 0.19 0.25
.2284 .2440 5.80 6.20
.050 BSC 1.27
.013 .020 0.330 0.508
.0040 0.10 .0098 0.25
X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS
16-Pin TSSOP (L) Package
16
.169 .177
4.3 4.5
1 .193 .201 4.9 5.1 .004 .008 .047 max. 1.20 SEATING PLANE 0.45 .018 0.75 .030 .252 BSC 6.4
0.09 0.20
.0256 BSC 0.65
.007 .012 0.19 0.30
.002 .006
0.05 0.15 X.XX DENOTES CONTROLLING X.XX DIMENSIONS IN MILLIMETERS
Note: Controlling dimensions in millimeters. Ref: JEDEC MS - 012 AC
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PS8589E
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PI6C2408 Zero Delay Clock Buffer
Ordering Information (Commercial Temperature Device)
Ordering Code PI6C2408-1W PI6C2408-1WE PI6C2408-1HW PI6C2408-1HWE PI6C2408-2W PI6C2408-2WE PI6C2408-3W PI6C2408-3WE PI6C2408-4W PI6C2408-4WE PI6C2408-6W PI6C2408-6WE PI6C2408-1WE PI6C2408-1HWE PI6C2408-1L PI6C2408-1LE PI6C2408-1HL PI6C2408-1HLE PI6C2408-3L PI6C2408-3LE PI6C2408-4L PI6C2408-4LE PI6C2408-1LE PI6C2408-1HLE Package W W W W W W W W W W W W W W L L L L L L L L L L Description 16-pin 150-mil SOIC Pb-free & Green, 16-pin 150-mil SOIC 16-pin 150-mil SOIC Pb-free & Green, 16-pin 150-mil SOIC 16-pin 150-mil SOIC Pb-free & Green, 16-pin 150-mil SOIC 16-pin 150-mil SOIC Pb-free & Green, 16-pin 150-mil SOIC 16-pin 150-mil SOIC Pb-free & Green, 16-pin 150-mil SOIC 16-pin 150-mil SOIC Pb-free & Green, 16-pin 150-mil SOIC Pb-free & Green 16-pin 150-mil SOIC Pb-free & Green 16-pin 150-mil SOIC 16-pin 173-mil TSSOP Pb-free & Green, 16-pin 173-mil TSSOP 16-pin 173-mil TSSOP Pb-free & Green, 16-pin 173-mil TSSOP 16-pin 173-mil TSSOP Pb-free & Green, 16-pin 173-mil TSSOP 16-pin 173-mil TSSOP Pb-free & Green, 16-pin 173-mil TSSOP Pb-free & Green 16-pin 173-mil TSSOP Pb-free & Green 16-pin 173-mil TSSOP Operating Range Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial
9
PS8589E
09/15/04
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI6C2408 Zero Delay Clock Buffer
Ordering Information (Industrial Temperature Device)
Ordering Code PI6C2408-1WI PI6C2408-1WIE PI6C2408-1HWI PI6C2408-1HWIE PI6C2408-2WI PI6C2408-2WIE PI6C2408-4WI PI6C2408-4WIE PI6C2408-6WI PI6C2408-6WIE PI6C2408-1LI PI6C2408-1LIE PI6C2408-6LI PI6C2408-6LIE Package W W W W W W W W W W L L L L Description 16-pin 150-mil SOIC Pb-free & Green, 16-pin 150-mil SOIC 16-pin 150-mil SOIC Pb-free & Green, 16-pin 150-mil SOIC 16-pin 150-mil SOIC Pb-free & Green, 16-pin 150-mil SOIC 16-pin 150-mil SOIC Pb-free & Green, 16-pin 150-mil SOIC 16-pin 150-mil SOIC Pb-free & Green, 16-pin 150-mil SOIC 16-pin 173-mil TSSOP Pb-free & Green, 16-pin 173-mil TSSOP 16-pin 173-mil TSSOP Pb-free & Green, 16-pin 173-mil TSSOP Operating Range Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial
Notes: 1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
Pericom Semiconductor Corporation * 1-800-435-2336 * www.pericom.com
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