CORE-2.5V Integrated Device Technology, CORE-2.5V Datasheet

no-image

CORE-2.5V

Manufacturer Part Number
CORE-2.5V
Description
350mhz, Crystal-to-lvcmos / Lvttl Frequency Synthesizer
Manufacturer
Integrated Device Technology
Datasheet
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
350MHZ, CRYSTAL-TO-LVCMOS/LVTTL
FREQUENCY SYNTHESIZER
crystal inputs. The VCO operates at a frequency range of 250MHz
to 700MHz. The VCO frequency is programmed in steps equal to
the value of the input reference or crystal frequency. The VCO and
output frequency can be programmed using the serial or parallel
interfaces to the configuration logic. The low phase noise
characteristics of the ICS8402I make it an ideal clock source for
Gigabit Ethernet and SONET applications.
Block Diagram
IDT™ / ICS™ LVCMOS/LVTTL FREQUENCY SYNTHESIZER
General Description
HiPerClockS™
TEST_CLK
XTAL_OUT
XTAL_SEL
S_CLOCK
ICS
VCO_SEL
nP_LOAD
XTAL_IN
S_LOAD
S_DATA
M0:M8
N0:N1
OE0
OE1
MR
The ICS8402I is a general purpose,
Crystal-to-LVCMOS/LVTTL High Frequency
Synthesizer and a member of the HiPerClockS™
family of High Performance Clock Solutions from
IDT. The ICS8402I has a selectable TEST_CLK or
OSC
PHASE DETECTOR
0
1
÷ M
CONFIGURATION
INTERFACE
VCO
LOGIC
PLL
0
1
÷16
÷2
÷4
÷8
Q0
Q1
TEST
1
Features
Two LVCMOS/LVTTL outputs
Selectable crystal oscillator interface or LVCMOS/LVTTL
TEST_CLK
Output frequency range: 15.625MHz to 350MHz
Crystal input frequency range: 12MHz to 40MHz
VCO range: 250MHz to 700MHz
Parallel or serial interface for programming counter and
output dividers
RMS period jitter: 30ps (maximum)
Cycle-to-cycle jitter: 100ps (maximum)
Full 3.3V or mixed 3.3V core/2.5V output supply
-40°C to 85°C ambient operating temperature
Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
Pin Assignment
5mm x 5mm x 0.925mm package body
GND
7mm x 7mm x 1.4mm package body
M5
M6
M7
M8
N0
N1
nc
1
2
3
4
5
6
7
8
32 31 30 29 28 27 26 25
9 10 11 12 13 14 15 16
32 Lead VFQFN
32 Lead LQFP
Y Package
K Package
ICS8402AYI REV. A OCTOBER 16, 2007
Top View
Top View
ICS8402I
24
23
22
21
20
19
18
17
ICS8402I
XTAL_OUT
TEST_CLK
XTAL_SEL
V
S_LOAD
S_DATA
S_CLOCK
MR
DDA

Related parts for CORE-2.5V

CORE-2.5V Summary of contents

Page 1

... Parallel or serial interface for programming counter and output dividers • RMS period jitter: 30ps (maximum) • Cycle-to-cycle jitter: 100ps (maximum) • Full 3.3V or mixed 3.3V core/2.5V output supply • -40°C to 85°C ambient operating temperature • Available in both standard (RoHS 5) and lead-free (RoHS 6) packages PLL ÷ ...

Page 2

ICS8402I 350MHZ, CRYSTAL-TO-LVCMOS/LVTTL FREQUENCY SYNTHESIZER Functional Description NOTE: The functional description that follows describes operation using a 25MHz crystal. Valid PLL loop divider values for different crystal or input frequencies are defined in the Input Frequency Characteristics, Table 5, NOTE ...

Page 3

... Test output which is ACTIVE in the serial mode of operation. Output Output driven LOW in parallel mode. LVCMOS/LVTTL interface levels. Power Core supply pin. Output enable. When logic HIGH, the outputs are enabled (default). Input Pullup When logic LOW, the outputs are in Tri-State. See Table 3D, OE Function Table ...

Page 4

ICS8402I 350MHZ, CRYSTAL-TO-LVCMOS/LVTTL FREQUENCY SYNTHESIZER Table 2. Pin Characteristics Symbol Parameter C Input Capacitance IN Power Dissipation Capacitance C PD (per output) R Input Pullup Resistor PULLUP R Input Pulldown Resistor PULLDOWN R Output Impedance OUT Function Tables Table 3A. ...

Page 5

ICS8402I 350MHZ, CRYSTAL-TO-LVCMOS/LVTTL FREQUENCY SYNTHESIZER Table 3B. Programmable VCO Frequency Function Table VCO Frequency (MHz) M Divide 250 10 275 11 • • • • 650 26 675 27 700 28 NOTE 1: These M divide values and the resulting ...

Page 6

... Outputs, I (LVCMOS) O Package Thermal Impedance LQFP Package 32 VFQFN Package Storage Temperature, T STG DC Electrical Characteristics Table 4A. Power Supply DC Characteristics, V Symbol Parameter V Core Supply Voltage DD V Analog Supply Voltage DDA V Output Supply Voltage DDO I Power Supply Current DD I Analog Supply Current DDA ...

Page 7

ICS8402I 350MHZ, CRYSTAL-TO-LVCMOS/LVTTL FREQUENCY SYNTHESIZER Table 4B. LVCMOS/LVTTL DC Characteristics, T Symbol Parameter V Input High Voltage IH OE0, OE1, MR, M0:M8, N0, N1, S_CLOCK, S_DATA, Input V S_LOAD, nP_LOAD, IL Low Voltage VCO_SEL, XTAL_SEL TEST_CLOCK TEST_CLOCK, MR, M0:M4, M6:M8, ...

Page 8

ICS8402I 350MHZ, CRYSTAL-TO-LVCMOS/LVTTL FREQUENCY SYNTHESIZER Table 6. Crystal Characteristics Parameter Mode of Oscillation Frequency Equivalent Series Resistance (ESR) Shunt Capacitance AC Electrical Characteristics Table 7A. AC Characteristics, V Parameter Symbol f Output Frequency OUT tjit(cc) Cycle-to-Cycle Jitter; NOTE 1, 3 ...

Page 9

ICS8402I 350MHZ, CRYSTAL-TO-LVCMOS/LVTTL FREQUENCY SYNTHESIZER Table 7B. AC Characteristics, V Parameter Symbol f Output Frequency OUT tjit(cc) Cycle-to-Cycle Jitter; NOTE 1, 3 tjit(per) Period Jitter, RMS; NOTE 1 tsk(o) Output Skew; NOTE Output Rise/Fall Time ...

Page 10

ICS8402I 350MHZ, CRYSTAL-TO-LVCMOS/LVTTL FREQUENCY SYNTHESIZER Parameter Measurement Information 1.65V±5% V DD, V DDA, V DDO LVCMOS GND -1.65V±5% 3.3/3.3V LVPECL Output Load AC Test Circuit sk(o) Output Skew V DDO 2 Q0, Q1 ® ® t cycle ...

Page 11

ICS8402I 350MHZ, CRYSTAL-TO-LVCMOS/LVTTL FREQUENCY SYNTHESIZER Parameter Measurement Information, continued 80% 20% Clock t Outputs R Output Rise/Fall Time Application Information Power Supply Filtering Technique As in any high speed analog circuitry, the power supply pins are vulnerable to random noise. ...

Page 12

ICS8402I 350MHZ, CRYSTAL-TO-LVCMOS/LVTTL FREQUENCY SYNTHESIZER Crystal Input Interface The ICS8402I has been characterized with 18pF parallel resonant crystals. The capacitor values, C1 and C2, shown in Figure 3 below were determined using a 25MHz, 18pF parallel resonant crystal C1 22p ...

Page 13

ICS8402I 350MHZ, CRYSTAL-TO-LVCMOS/LVTTL FREQUENCY SYNTHESIZER Recommendations for Unused Input and Output Pins Inputs: Crystal Inputs For applications not requiring the use of the crystal oscillator input, both XTAL_IN and XTAL_OUT can be left floating. Though not required, but for additional ...

Page 14

ICS8402I 350MHZ, CRYSTAL-TO-LVCMOS/LVTTL FREQUENCY SYNTHESIZER Reliability Information T Table 8A. vs. Air Flow Table for a 32 Lead LQFP JA Linear Feet per Minute Single-Layer PCB, JEDEC Standard Test Boards Multi-Layer PCB, JEDEC Standard Test Boards NOTE: Most modern PCB ...

Page 15

ICS8402I 350MHZ, CRYSTAL-TO-LVCMOS/LVTTL FREQUENCY SYNTHESIZER Package Outline and Package Dimension Package Outline - Y Suffix for 32 Lead LQFP Table 9A. Package Dimensions for 32 Lead LQFP JEDEC Variation: BBC - HD All Dimensions in Millimeters Symbol Minimum Nominal N ...

Page 16

ICS8402I 350MHZ, CRYSTAL-TO-LVCMOS/LVTTL FREQUENCY SYNTHESIZER Package Outline - K Suffix for 32 Lead VFQFN S eating Plan e Ind ex Area View D Chamfer 4x 0.6 x 0.6 max OPTIONAL NOTE: The following package mechanical drawing is ...

Page 17

... NOTE: Parts that are ordered with an "LF" suffix to the part number are the Pb-Free configuration and are RoHS compliant. While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology (IDT) assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use ...

Page 18

ICS8402I 350MHZ, CRYSTAL-TO-LVCMOS/LVTTL FREQUENCY SYNTHESIZER Revision History Sheet Rev Table Page Description of Change 1 Pin Assignment - added 32 Lead VFQFN information. 6 Absolute Maximum Ratings - added 32 Lead VFQFN package thermal impedance. 12 Added LVCMOS to XTAL ...

Page 19

... Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT and the IDT logo are trademarks of Integrated Device Technology, Inc. Accelerated Thinking is a service mark of Integrated Device Technology, Inc. All other brands, product names and marks are or may be trademarks or registered trademarks used to identify products or services of their respective owners ...

Related keywords