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ICS849S625I Datasheet

Crystal-to-LVPECL/LVDS Clock Synthesizer

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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


Renesas Electronics Components Datasheet

ICS849S625I Datasheet

Crystal-to-LVPECL/LVDS Clock Synthesizer

No Preview Available !

Block Diagram
SEL_OUT
OEA
SELA[1:0]
BYPASS
REF_CLK
XTAL_IN
25MHz
XTAL_OUT
Pulldown
Pullup
Pulldown
2
Pulldown
Pulldown
OSC
Phase
Detector
÷2
1
VCO
575MHz - 630MHz
0
MR
OEB
SELB[0:1]
Pulldown
Pullup
Pulldown
2
M = ÷25
SELC[0:1]
OEC
Pulldown
2
Pullup
NA =
÷1, ÷2,
÷4, ÷5
NB =
÷1, ÷2,
÷4, ÷5
NC =
÷1, ÷2,
÷4, ÷5
849S625 Data Sheet
6 QA[0:5]
6 nQA[0:5]
2 QB[0:1]
2 nQB[0:1]
2 QC[0:1]
2 nQC[0:1]
©2015 Integrated Device Technology, Inc
2
December 2, 2015


Part Number ICS849S625I
Description Crystal-to-LVPECL/LVDS Clock Synthesizer
Maker Renesas
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ICS849S625I Datasheet PDF






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