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5V928PGGI8

型号：

5V928PGGI8

品牌：

IDT[ INTEGRATED DEVICE TECHNOLOGY ]

页数：

6 页

PDF大小：

61 K

下载PDF手册
IDT5V928  
8 OUTPUT  
CLOCK GENERATOR  
FEATURES:  
DESCRIPTION:  
• 3V to 3.6V operating voltage  
The IDT5V928is a low-cost,lowskew,lowjitter,andhigh-performance  
clocksynthesizer. Ithas beenspeciallydesignedtointerface withGigabit  
Ethernet(125MHz),FibreCHannel(106.25MHz),andOC-3(155.52MHz)  
• 50MHz to 160MHz output frequency range  
• Input from fundamental crystal oscillator or external source  
• Internal PLL feedback (loading feedback output relative to applications. Itcanbe programmedtoprovide outputfrequencies ranging  
other outputs, adjusts propagation delay between REF inputs from50MHzto160MHz, withinputfrequencies rangingfrom6.25MHzto  
and outputs)  
80MHz.  
TheIDT5V928includes aninternalRCfilterthatprovides excellentjitter  
• 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  
characteristics and eliminates the need for external components. When  
usingtheoptionalcrystalinput,thechipaccepts a10-40MHzfundamental  
• PLL bypass for testing and power-down control (S1 = H, S0 = H, mode crystalwitha maximumequivalentseries resistance of50Ω.  
powers part down <500μA)  
• Available in TSSOP package  
APPLICATIONS:  
• Gigabit ethernet  
• Router  
• Network switches  
• SAN  
• Instrumentation  
• Fibre channel  
FUNCTIONALBLOCKDIAGRAM  
OE  
VCO DIVIDE  
1/N  
Q0  
PHASE  
DETECTOR  
CHARGE  
PUMP  
LOOP  
FILTER  
VCO  
REF  
Q1  
Q2  
Q3  
Q4  
Q5  
0
1
X2  
X1  
CRYSTAL  
OSCILLATOR  
Q6  
Q7  
SELECT MODE  
S1 S0  
TheIDTlogoisaregisteredtrademarkofIntegratedDeviceTechnology,Inc.  
INDUSTRIAL TEMPERATURE RANGE  
JULY 2006  
1
c
2007 Integrated Device Technology, Inc.  
DSC 5854/8  
IDT5V928  
8OUTPUTCLOCKGENERATOR  
INDUSTRIALTEMPERATURERANGE  
ABSOLUTEMAXIMUMRATINGS(1)  
PINCONFIGURATION  
Symbol  
Description  
Max.  
– 0.5 to +4.6  
– 0.5 to +4.6  
±50  
Unit  
V
VDD/VDDQ  
SupplyVoltagetoGround  
InputVoltage  
S0  
1
REF  
X1  
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
VI  
IO  
V
2
S1  
OutputCurrent  
mA  
° C  
° C  
3
X2  
OE  
GND  
VDDQ  
Q7  
TSTG  
TJ  
StorageTemperature  
JunctionTemperature  
– 65 to +150  
150  
4
VDD  
VDDQ  
Q0  
5
NOTE:  
6
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.  
7
Q1  
Q6  
8
GND  
GND  
GND  
Q5  
9
GND  
Q2  
10  
11  
12  
Q4  
PINDESCRIPTION  
Q3  
VDDQ  
VDDQ  
Pin Name Type  
Description  
S[1:0]  
I
Three leveldivider/mode selectpins. FloattoMID.  
OE  
I
Outputenablebar. OE hasapull-down. OutputQ[1:7]tristated  
TSSOP  
TOP VIEW  
when HIGH. Output Q0 remains running when in PLL mode  
andtri-stateswheninTESTmode.  
X1  
I
Crystal oscillator input. Connect to GND if oscillator not  
required.  
CRYSTALSPECIFICATION  
X2  
I
I
Crystaloscillatoroutput. Leaveunconnectedforclockinput.  
REF  
Q[1:7]  
Q0  
Input clock. Connect to X2 if crystal oscillator is used.  
OutputatN*REFfrequency  
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.  
O
O
OutputatN*REFinternallyconnectedforPLLfeedback  
Powersupplyforthedeviceoutputs. ConnecttoVDDonPCB.  
VDDQ  
VDD  
PWR  
PWR  
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
IDT5V928  
8OUTPUTCLOCKGENERATOR  
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.  
—
—
—
—
—
—
—
—
—
—
—
—
Max  
Unit  
VIL  
InputLOWVoltage  
—
2
0.8  
—
V
V
VIH  
Input HIGH Voltage  
VIHH  
VIMM  
VILL  
IIN  
Input HIGH Voltage  
3-levelinputonly  
VDD - 0.6  
VDD/2 - 0.3  
—
—
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  
HIGH Level  
—
+200  
+50  
I3  
3-Level Input DC Current, S[1:0]  
VIN = VDD/2  
VIN = GND  
VIN = VDD  
MID Level  
LOW Level  
- 50  
μA  
-200  
—
—
IIH  
Input HIGH Current  
OutputLOWVoltage  
OutputHIGHVoltage  
100  
μA  
V
VOL  
VOH  
IOL = 12mA  
IOH = -12mA  
—
0.4  
2.4  
—
V
3
IDT5V928  
8OUTPUTCLOCKGENERATOR  
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  
200  
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 toQ1:7)  
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  
ns/V  
ns  
(2)  
Input clock pulse, HIGH or LOW  
2
—
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
IDT5V928  
8OUTPUTCLOCKGENERATOR  
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
IDT5V928  
8OUTPUTCLOCKGENERATOR  
INDUSTRIALTEMPERATURERANGE  
ORDERINGINFORMATION  
X
IDT  
XXXX  
Device Type  
X
Package  
Proceed  
I
Industrial Temperature Range (- 40° C to + 85° C)  
PG  
PGG  
Thin Shrink Small Outline Package  
TSSOP - Green  
Communications Clock Multiplier  
5V928  
CORPORATE HEADQUARTERS  
6024 Silver Creek Valley Road  
San Jose, CA 95138  
for SALES:  
800-345-7015 or 408-284-8200  
fax: 408-284-2775  
www.idt.com  
for Tech Support:  
clockhelp@idt.com  
6
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