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Integrated Device Technology Electronic Components Datasheet

ICS843301I-108 Datasheet

2.5V LVPECL 75MHZ FREQUENCY SYNTHESIZER W/SSC

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ICS843301I-108 pdf
PRELIMINARY
FEMTOCLOCKS™ CRYSTAL-TO-3.3V, 2.5V LVPECL
75MHZ FREQUENCY SYNTHESIZER W/SSC
ICS843301I-108
GENERAL DESCRIPTION
The ICS843301I-108 is a 75MHz Frequency
ICS Generator and a member of the HiPerClocksTM
HiPerClockS™ family of high perfor mance devices from IDT.
The ICS843301I-108 uses a 20MHz crystal to
synthesize 75MHz output. The device supports
0.5% downspread spread spectrum clocking. The ICS843301I-
108 has excellent <1ps phase jitter performance, over an
integration range of 900kHz - 7.5MHz. The device is packaged
in a small 8-pin TSSOP, making it ideal for use in systems with
limited board space.
FEATURES
One differential 3.3V or 2.5V LVPECL output
Crystal oscillator interface designed for 20MHz,
18pF parallel resonant crystal
Output frequency: 75MHz
Supports SSC, 0.5% downspread
RMS phase jitter @ 75MHz, using a 20MHz crystal
(900kHz - 7.5MHz): 0.73ps (typical)
Full 3.3V or 2.5V operating supply
-40°C to 85°C ambient operating temperature
Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
SSC FUNCTION TABLE
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SSC
0 (default)
1
Mode
SSC Off
0.5% Downspread
BLOCK DIAGRAM
PIN ASSIGNMENT
XTAL_IN
XTAL_OUT
20MHz
OSC
SSC Pulldown
Phase
Detector
VCO
600MHz
PLL
N Div
÷8
M Div
÷30
VCCA 1
8 VCC
VEE 2
7Q
XTAL_OUT 3
6 nQ
Q
XTAL_IN 4
5 SSC
nQ
ICS843301I-108
8-Lead TSSOP
4.40mm x 3.0mm x 0.925mm package body
G Package
Top View
The Preliminary Information presented herein represents a product in pre-production. The noted characteristics are based on initial product characterization
and/or qualification. Integrated Device Technology, Incorporated (IDT) reserves the right to change any circuitry or specifications without notice.
IDT/ ICS3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER W/SSC 1
ICS843301BGI-108 REV. A OCTOBER 9, 2007



Integrated Device Technology Electronic Components Datasheet

ICS843301I-108 Datasheet

2.5V LVPECL 75MHZ FREQUENCY SYNTHESIZER W/SSC

No Preview Available !

ICS843301I-108 pdf
ICS843301I-108
FEMTOCLOCKS™ CRYSTAL-TO-3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER W/SSC
PRELIMINARY
TABLE 1. PIN DESCRIPTIONS
Number
Name
Type
Description
1
VCCA
Power
2 VEE Power
3, 4
XTAL_OUT,
XTAL_IN
Input
Analog supply pin.
Negative supply pin.
Crystal oscillator interface. XTAL_IN is the input,
XTAL_OUT is the output.
5
SSC
Input Pulldown SSC control pin. LVCMOS/LVTTL interface levels.
6, 7
nQ, Q
Output
Differential clock outputs. LVPECL interface levels.
8 VCC Power
Core and output supply pin.
NOTE: Pulldown refers to internal input resistors. See Table 2, Pin Characteristics, for typical values.
TABLE 2. PIN CHARACTERISTICS
Symbol
CIN
RPULLDOWN
Parameter
Input Pin Capacitance
Input Pulldown Resistor
Test Conditions
Minimum
Typical
4
51
Maximum
Units
pF
kΩ
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IDT/ ICS3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER W/SSC 2
ICS843301BGI-108 REV. A OCTOBER 9, 2007



Integrated Device Technology Electronic Components Datasheet

ICS843301I-108 Datasheet

2.5V LVPECL 75MHZ FREQUENCY SYNTHESIZER W/SSC

No Preview Available !

ICS843301I-108 pdf
ICS843301I-108
FEMTOCLOCKS™ CRYSTAL-TO-3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER W/SSC
PRELIMINARY
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VCC
4.6V
Inputs, VI
Outputs, IO
Continuous Current
Surge Current
-0.5V to VCC + 0.5V
50mA
100mA
Package Thermal Impedance, θJA 101.7°C/W (0 mps)
Storage Temperature, TSTG
-65°C to 150°C
NOTE: Stresses beyond those listed under Absolute
Maximum Ratings may cause permanent damage to the
device. These ratings are stress specifications only. Functional op-
eration 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 ex-
tended periods may affect product reliability.
TABLE 3A. POWER SUPPLY DC CHARACTERISTICS, VCC = 3.3V±5%, TA = -40°C TO 85°C
Symbol Parameter
Test Conditions
Minimum
VCC
V
CCA
ICCA
IEE
Core Supply Voltage
Analog Supply Voltage
Analog Supply Current
Power Supply Current
3.135
V – 0.10
CC
Typical
3.3
3.3
10
106
Maximum
3.465
V
CC
Units
V
V
mA
mA
TABLE 3B. POWER SUPPLY DC CHARACTERISTICS, VCC = 2.5V±5%, TA = -40°C TO 85°C
Symbol Parameter
Test Conditions
Minimum
VCC
VCCA
ICCA
IEE
Core Supply Voltage
Analog Supply Voltage
Analog Supply Current
Power Supply Current
2.375
VCC – 0.09
Typical
2.5
2.5
9
100
Maximum
2.625
VCC
Units
V
V
mA
mA
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TABLE
3C.
LVCMOS
/
LVTTL
DC
CHARACTERISTICS,
V
CC
=
3.3V±5%
OR
2.5V±5%,
TA
=
-40°C
TO
85°C
Symbol
Parameter
Test Conditions
Minimum Typical Maximum Units
VIH Input High Voltage
VIL Input Low Voltage
IIH Input High Current
IIL Input Low Current
VCC = 3.3V
VCC = 2.5V
VCC = 3.3V
VCC = 2.5V
VCC = VIN = 3.465V or 2.625V
VCC = 3.465V or 2.625V, VIN = 0V
2
1.7
-0.3
-0.3
-5
VCC + 0.3
VCC + 0.3
0.8
0.7
150
V
V
V
V
µA
µA
TABLE
3D.
LVPECL
DC
CHARACTERISTICS,
V
CC
=
3.3V±5%
OR
2.5V±5%,
TA
=
-40°C
TO
85°C
Symbol Parameter
Test Conditions
Minimum Typical
VOH Output High Voltage; NOTE 1
VOL Output Low Voltage; NOTE 1
VSWING
Peak-to-Peak Output Voltage Swing
NOTE 1: Outputs terminated with 50Ω to VCC - 2V.
VCC - 1.4
VCC - 2.0
0.6
Maximum
VCC - 0.9
VCC - 1.7
1.0
Units
V
V
V
IDT/ ICS3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER W/SSC 3
ICS843301BGI-108 REV. A OCTOBER 9, 2007




Part Number ICS843301I-108
Description 2.5V LVPECL 75MHZ FREQUENCY SYNTHESIZER W/SSC
Maker Integrated Device Technology
Total Page 15 Pages
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