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5V927PGI8

型号:

5V927PGI8

品牌:

IDT[ INTEGRATED DEVICE TECHNOLOGY ]

页数:

6 页

PDF大小:

307 K

IDT5V927  
QUAD OUTPUT  
CLOCK GENERATOR  
DESCRIPTION:  
FEATURES:  
The IDT5V927is a low-cost,lowskew,lowjitter,andhigh-performance  
clocksynthesizer. Ithas beenspeciallydesignedtointerface withGigabit  
Ethernet(125MHz),Fibre Channel(106.25MHz),andOC-3(155.52MHz)  
applications. Itcanbe programmedtoprovide outputfrequencies ranging  
from50MHzto160MHz, withinputfrequencies rangingfrom6.25MHzto  
80MHz.  
• 3V to 3.6V operating voltage  
• 50MHz to 160MHz output frequency range  
• Input from fundamental crystal oscillator or external source  
• Internal PLL feedback (loading feedback output relative to  
other outputs, adjusts propagation delay between REF inputs  
and outputs)  
TheIDT5V927includes aninternalRCfilterthatprovides excellentjitter  
characteristics and eliminates the need for external components. When  
usingtheoptionalcrystalinput,thechipaccepts a10-40MHzfundamental  
mode crystalwitha maximumequivalentseries resistance of50Ω.  
• Select inputs (S[1:0]) for FB divide selection (multiply ratio of 2,  
3, 4, 4.25, 5, 6, 6.25, and 8)  
• Low jitter  
• PLL bypass for testing and power-down control (S1 = H, S0 = H,  
powers part down <500μA)  
Available in TSSOP package  
APPLICATIONS:  
• Gigabit ethernet  
• Router  
Network switches  
• SAN  
Instrumentation  
• Fibre channel  
FUNCTIONALBLOCKDIAGRAM  
OE  
VCO DIVIDE  
1/N  
PHASE  
DETECTOR  
CHARGE  
PUMP  
LOOP  
FILTER  
VCO  
Q0  
Q1  
Q2  
REF  
0
1
Q3  
X2  
X1  
CRYSTAL  
OSCILLATOR  
SELECT MODE  
S1 S0  
TheIDTlogoisaregisteredtrademarkofIntegratedDeviceTechnology,Inc.  
INDUSTRIAL TEMPERATURE RANGE  
OCTOBER 2008  
1
c
2006 Integrated Device Technology, Inc.  
DSC 5853/8  
IDT5V927  
QUADOUTPUTCLOCKGENERATOR  
INDUSTRIALTEMPERATURERANGE  
ABSOLUTEMAXIMUMRATINGS(1)  
PINCONFIGURATION  
Symbol  
Description  
Max.  
– 0.5 to +4.6  
– 0.5 to +4.6  
±50  
Unit  
V
VDD/VDDQ  
SupplyVoltagetoGround  
InputVoltage  
16  
15  
14  
13  
12  
11  
10  
9
1
S0  
REF  
VI  
IO  
V
OutputCurrent  
mA  
° C  
° C  
2
3
4
5
6
7
8
X1  
X2  
S1  
TSTG  
TJ  
StorageTemperature  
JunctionTemperature  
– 65 to +150  
150  
OE  
VDD  
Q0  
GND  
Q3  
NOTE:  
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.  
GND  
Q1  
GND  
Q2  
PINDESCRIPTION  
VDDQ  
VDDQ  
Pin Name Type  
Description  
S[1:0]  
I
Three leveldivider/mode selectpins. FloattoMID.  
OE  
I
Outputenablebar. OE hasapull-down. OutputQ[1:3]tristated  
when HIGH. Output Q0 remains running when in PLL mode  
TSSOP  
TOP VIEW  
andtri-stateswheninTESTmode.  
X1  
X2  
I
I
I
Crystaloscillatorinput.ConnecttoGNDifoscillatornotrequired.  
Crystaloscillatoroutput. Leaveunconnectedforclockinput.  
Input clock. Connect to X2 if crystal oscillator is used.  
REF  
Q[1:3]  
Q0  
O
OutputatN*REFfrequency  
O
OutputatN*REFinternallyconnectedforPLLfeedback  
Powersupplyforthedeviceoutputs. ConnecttoVDDonPCB.  
CRYSTALSPECIFICATION  
VDDQ  
VDD  
PWR  
PWR  
The crystal oscillators should be fundamental mode quartz crystals:  
overtone crystals are notsuitable. Crystalfrequencyshouldbe specified  
for parallel resonance with 50Ω maximum equivalent series resonance.  
CrystaltuningcapacitorsshouldbeconnectedfromX2/REFtoGNDandfrom  
X1 to GND.  
Powersupplyforthedevicecoreandinputs. ConnecttoVDD  
on PCB.  
GND  
PWR Groundsupply  
DIVIDESELECTIONTABLE(1)  
S1  
S0  
Divide-by-N Value  
Mode  
PLL  
L
L
2
3
L
M
H
L
PLL  
L
4
PLL  
M
M
M
H
H
H
4.25  
5
PLL  
M
H
L
PLL  
6
PLL  
6.25  
8
PLL  
M
H
PLL  
TEST  
TEST(2)  
NOTES:  
1. H = HIGH  
M = MEDIUM  
L = LOW  
2. Test mode for low frequency testing. In this mode, REF clock bypasses the VCO (VCO powered down) and the crystal oscillator is powered down.  
2
IDT5V927  
QUADOUTPUTCLOCKGENERATOR  
INDUSTRIALTEMPERATURERANGE  
COMMONOUTPUTFREQUENCYEXAMPLES(MHz)  
Output  
50  
25  
LL  
60  
64  
72  
75  
80  
10  
90  
15  
100  
20  
Input  
10  
16  
12  
25  
FB Divide Selection S[1:0]  
MH  
LH  
MH  
LM  
HM  
MH  
MM  
Output  
106.25  
17  
106.25  
25  
120  
15  
125  
20  
125  
25  
125  
62.5  
LL  
150  
25  
155.52  
19.44  
HM  
Input  
FB Divide Selection S[1:0]  
HL  
ML  
HM  
HL  
MM  
MH  
OPERATINGCONDITIONS  
Symbol  
VDD/VDDQ  
TA  
Parameter  
Min.  
Typ.  
3.3  
25  
Max.  
Unit  
V
Power Supply Voltage  
OperatingTemperature  
OutputLoadCapacitance  
3
3.6  
+85  
15  
- 40  
° C  
pF  
CL  
5
CIN  
Input Capacitance, OE, F = 1MHz, VIN = 0V, TA = 25°C  
7
pF  
DCELECTRICALCHARACTERISTICSOVEROPERATINGRANGE  
FollowingConditionsApplyUnlessOtherwiseSpecified:  
Industrial: TA = –40°C to +85°C, VDD/VDDQ = 3.3V ±0.3V  
Symbol  
Parameter  
Test Conditions  
Min.  
Typ.  
2
Max  
Unit  
VIL  
InputLOWVoltage  
0.8  
V
V
VIH  
Input HIGH Voltage  
2
VDD - 0.6  
VDD/2 - 0.3  
VIHH  
VIMM  
VILL  
IIN  
Input HIGH Voltage  
3-levelinputonly  
V
InputMIDVoltage  
3-levelinputonly  
VDD/2 + 0.3  
0.6  
V
InputLOWVoltage  
3-levelinputonly  
V
InputLeakageCurrent(REFinputonly)  
VIN = VDD or GND,VDD = Max.  
-5  
+5  
μA  
VIN = VDD  
VIN = VDD/2  
VIN = GND  
VIN = VDD  
HIGH Level  
+200  
+50  
I3  
3-Level Input DC Current, S[1:0]  
Input HIGH Current  
MID Level  
LOW Level  
OE  
-50  
μA  
-200  
IIH  
100  
μA  
mA  
V
VIN = VDD, S[1:0] = HH X1  
4
VOL  
OutputLOWVoltage  
OutputHIGHVoltage  
IOL = 12mA  
0.4  
VOH  
IOH = -12mA  
2.4  
V
3
IDT5V927  
QUADOUTPUTCLOCKGENERATOR  
INDUSTRIALTEMPERATURERANGE  
POWERSUPPLYCHARACTERISTICS  
Symbol  
Parameter  
Test Conditions (1)  
VDD = Max.  
Min.  
Typ.  
Max  
Unit  
IDD_PD  
Power Down Current  
500  
μA  
S[1:0] = HH  
OE = L; REF = L; X1 = L  
Alloutputsunloaded  
VDD = Max., VIN = 3V  
VDD = 3.6V  
ΔIDD  
SupplyCurrentperInput  
Dynamic Supply Current  
30  
μA  
IDD  
130  
mA  
S[1:0] = LL  
OE = L  
FOUT = 150MHz  
Alloutputsunloaded  
NOTE:  
1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.  
ACELECTRICALCHARACTERISTICSOVEROPERATINGRANGE  
Symbol  
tR,tF  
Parameter  
Test Conditions  
Min.  
Typ.  
0.7  
50  
Max.  
1.5  
Unit  
ns  
RiseTime,FallTime  
Output/Duty Cycle  
0.8V to 2V  
dT  
VT = VDDQ/2  
45  
55  
%
fOUT 100MHz, all N  
-200  
-200  
-350  
200  
200  
350  
150  
155  
160  
(1)  
tPD  
REF to Q0  
VT = VDDQ/2  
50 < fOUT < 160MHz, N 4  
ps  
50 < fOUT < 160MHz, N 4.25  
tSK  
tJ  
OutputtoOutputSkew(Q0 toQ1:3)  
Cycle - Cycle Jitter  
Equalloads  
ps  
ps  
fOUT 100MHz  
-155  
50  
fOUT  
OutputFrequency  
MHz  
NOTE:  
1. When using a clock input.  
INPUTTIMINGREQUIREMENTS  
Symbol  
tR,tF  
tPWC  
DH  
Description(1)  
Min.  
Max.  
10  
Unit  
(2)  
Maximuminputrise andfalltime, 0.8Vto2V  
2
ns/V  
ns  
(2)  
Input clock pulse, HIGH or LOW  
Inputdutycycle(2)  
10  
90  
%
fOSC  
XTALoscillatorfrequency  
40  
MHz  
MHz  
(2)  
fIN  
Inputfrequency  
50/N  
160/N  
NOTES:  
1. Where pulse width implied by DH is less than the tPWC limit, tPWC limit applies,  
2. When using a clock input.  
4
IDT5V927  
QUADOUTPUTCLOCKGENERATOR  
INDUSTRIALTEMPERATURERANGE  
AC TEST LOADS AND WAVEFORMS  
VDD  
150Ω  
150Ω  
OUTPUT  
15pF  
AC Test Load  
3V  
2V  
VTH = VDD/2  
0.8  
0V  
1ns  
1ns  
Input Test Waveform  
VDDQ  
2V  
VTH = VDDQ/2  
0.8  
0V  
tR  
tF  
Output Waveform  
5
IDT5V927  
QUADOUTPUTCLOCKGENERATOR  
INDUSTRIALTEMPERATURERANGE  
ORDERINGINFORMATION  
X
X
XXXX  
Package  
Package  
Device Type  
I
Industrial Temperature Range (-40°C to +85°C)  
PG  
PGG  
Thin Shrink Small Outline Package  
TSSOP - Green  
Quad Output Clock Generator  
5V927  
CORPORATE HEADQUARTERS  
6024 Silver Creek Valley Road  
San Jose, CA 95138  
for SALES:  
800-345-7015 or 408-284-8200  
fax: 408-284-2775  
for Tech Support:  
clockhelp@idt.com  
www.idt.com  
6
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