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PDF 849S625 Data sheet ( Hoja de datos )

Número de pieza 849S625
Descripción Crystal-to-LVPECL/LVDS Clock Synthesizer
Fabricantes IDT 
Logotipo IDT Logotipo



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No Preview Available ! 849S625 Hoja de datos, Descripción, Manual

Crystal-to-LVPECL/LVDS
Clock Synthesizer
849S625
Data Sheet
General Description
Features
The 849S625 is a high frequency clock generator. The 849S625
uses an external 25MHz crystal to synthesize 625MHz, 312.5MHz,
156.25MHz and 125MHz clocks. The 849S625 has excellent
cycle-to-cycle and RMS phase jitter performance.
The 849S625 operates at full 3.3V supply mode and is available in a
fully RoHS compliant 48-lead TQFP, E-Pad package.
Frequency Table for Bank A, B and C Outputs
Ten selectable differential LVPECL or LVDS outputs
Output frequencies of 625MHz, 312.5MHz, 156.25MHz or
125MHz using a 25MHz crystal.
Crystal interface designed for a 25MHz, parallel resonant crystal
Cycle-to-cycle jitter: 25ps (maximum)
RMS phase jitter at 156.25MHz (1MHz - 20MHz):
0.375ps (typical), LVDS outputs
Output duty cycle: 53% (maximum)
Full 3.3V supply mode
-40°C to 85°C ambient operating temperature
Available in lead-free (RoHS 6) packaging
Crystal Frequency (MHz) M Feedback Divider VCO Frequency (MHz) Nx Output Divider
Output Frequency (MHz)
25
25 625
1
625
25
25 625
2
312.5
25
25 625
4
156.25
25
25 625
5
125
Pin Assignment
XTAL_IN
XTAL_OUT
VEE
SELC0
SELC1
OEA
VCC
OEB
OEC
SELB0
SELB1
VEE
48 47 46 45 44 43 42 41 40 39 38 37
1 36
2 35
3 34
4 33
5 ICS849S625I 32
6 31
7 30
8 29
9 28
10 27
11 26
12 25
13 14 15 16 17 18 19 20 21 22 23 24
QA1
nQA1
QA2
nQA2
VCCO
VEE
QA3
nQA3
QA4
nQA4
QA5
nQA5
48 Lead TQFP, E-Pad
7mm x 7mm x 1.0mm package body
Y Package
Top View
©2015 Integrated Device Technology, Inc
1
December 2, 2015

1 page




849S625 pdf
849S625 Data Sheet
Absolute Maximum Ratings
NOTE: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device.
These ratings are stress specifications only. Functional operation of product at these conditions or any conditions beyond
those listed in the DC Characteristics or AC Characteristics is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect product reliability.
Item
Supply Voltage, VCC
Inputs, VI
XTAL_IN
Other Inputs
Outputs, LVPECL IO
Continuos Current
Surge Current
Rating
4.6V
0V to VCC
-0.5V to VCC + 0.5V
50mA
100mA
Outputs, LVDS IO
Continuos Current
Surge Current
Package Thermal Impedance, JA
Storage Temperature, TSTG
10mA
15mA
33.1C/W (0 mps)
-65C to 150C
DC Electrical Characteristics
Table 4A. LVDS Power Supply DC Characteristics, VCC = VCCO = 3.3V ± 5%, TA = -40°C to 85°C
Symbol Parameter
Test Conditions
Minimum
Typical
VCC
VCCA
VCCO
ICC
ICCA
ICCO
Core Supply Voltage
Analog Supply Voltage
Output Supply Voltage
Power Supply Current
Analog Supply Current
Output Supply Current
3.135
VCC – 0.16
3.135
3.3
3.3
3.3
NOTE: Outputs configured as LVDS (SEL_OUT = 0).
NOTE: For the Power Supply Voltage Sequence Information, see Applications Information section.
Maximum
3.465
VCC
3.465
107
16
228
Units
V
V
V
mA
mA
mA
Table 4B. LVPECL Power Supply DC Characteristics, VCC = VCCO = 3.3V ± 5%, VEE = 0V, TA = -40°C to 85°C
Symbol Parameter
Test Conditions
Minimum
Typical
Maximum
VCC
VCCA
VCCO
IEE
ICCA
Core Supply Voltage
Analog Supply Voltage
Output Supply Voltage
Power Supply Current
Analog Supply Current
3.135
VCC – 0.16
3.135
3.3
3.3
3.3
3.465
VCC
3.465
181
16
NOTE: Outputs configured as LVPECL (SEL_OUT = 1).
NOTE: For the Power Supply Voltage Sequence Information, see Applications Information section.
Units
V
V
V
mA
mA
©2015 Integrated Device Technology, Inc
5
December 2, 2015

5 Page





849S625 arduino
Parameter Measurement Information, continued
nQAx, nQBx, nQCx
QAx, QBx, QCx
849S625 Data Sheet
Output Duty Cycle/Pulse Width/Period
Offset Voltage Setup
Differential Output Voltage Setup
©2015 Integrated Device Technology, Inc
11
December 2, 2015

11 Page







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