ICS810251AGILF IDT, Integrated Device Technology Inc, ICS810251AGILF Datasheet

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ICS810251AGILF

Manufacturer Part Number
ICS810251AGILF
Description
IC VCXO SYNC ETH ATTEN 16-TSSOP
Manufacturer
IDT, Integrated Device Technology Inc
Series
HiPerClockS™r
Type
Jitter Attenuator, Voltage Controlled Crystal Oscillator (VCXO)r
Datasheet

Specifications of ICS810251AGILF

Pll
Yes with Bypass
Input
Clock
Output
LVCMOS, LVTTL
Number Of Circuits
1
Ratio - Input:output
1:1
Differential - Input:output
No/No
Frequency - Max
25MHz
Divider/multiplier
Yes/No
Voltage - Supply
2.375 V ~ 3.465 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-TSSOP
Frequency-max
25MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
810251AGILF

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ICS810251AGILF
Manufacturer:
IDT
Quantity:
212
General Description
attenuation for synchronous Ethernet applications. The ICS810251I
can take an input of either 25MHz or 125MHz and produce a single
LVCMOS output of 25MHz.
The device is packaged in a small 16 lead TSSOP package and is
ideal for use on space constrained boards typically encountered in
most synchronous ethernet applications.
Applications
Block Diagram
ICS810251AGI REVISION A JULY 28, 2009
HiPerClockS™
CLK_IN
ICS
Synchronous Ethernet v0.39a
End equipment compliant with Std IEEE 802.039a
(25MHz or 125MHz
input frequency auto
detect)
The ICS810251I is a high performance, low jitter/low
phase noise VCXO and is a member of the
HiPerClockS™ family of high performance clock
solutions from IDT. The ICS810251i uses a low
frequency and low cost pullable crystal to achieve jitter
(÷1 or ÷5)
divider
Pre-
VCXO and Synchronous Ethernet
Jitter Attenuator
(External loop
filter inputs.)
PFD
LF1
VCXO-PLL
LF0
CP
25MHz
VCXO
1
0
OE
1
25MHz
Features
Q
One single-ended output (LVCMOS or LVTTL levels),
output Impedance: 15Ω
Phase jitter attenuation by the VCXO-PLL using a 25MHz pullable
external crystal (XTAL)
Input frequencies: 25MHz or 125MHz
Output frequency: 25MHz
PLL loop bandwidth adjustable by external components
Absolute pull range is ±50 ppm (using the internal oscillator)
25MHz or 125MHz auto input frequency detect
Full 3.3V or 2.5V supply voltage
-40°C to 85°C ambient operating temperature
Available in lead-free (RoHS 6) package
Pin Assignment
PLL_SEL
Reserved
4.4mm x 5.0mm x 0.925mm
V
V
GND
V
DDO
DDA
OE
DD
Q
16-Lead TSSOP
package body
©2009 Integrated Device Technology, Inc.
ICS810251I
G Package
Top View
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
ICS810251I
CLK_IN
GND
V
LF1
LF0
XTAL_IN
XTAL_OUT
DATA SHEET
DD

Related parts for ICS810251AGILF

ICS810251AGILF Summary of contents

Page 1

VCXO and Synchronous Ethernet Jitter Attenuator General Description The ICS810251I is a high performance, low jitter/low ICS phase noise VCXO and is a member of the HiPerClockS™ family of high performance clock HiPerClockS™ solutions from IDT. The ICS810251i uses a ...

Page 2

ICS810251I Data Sheet Table 1. Pin Descriptions Number Name 1 PLL_SEL Input GND Power 3 Reserved Reserved 4 Q Output 5 V Power DDO 6 OE Input 7 V Power DDA Power DD 10, ...

Page 3

ICS810251I 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 ...

Page 4

ICS810251I Data Sheet Table 3C. LVCMOS/LVTTL DC Characteristics, V Symbol Parameter Input V IH High Voltage Input V IL Low Voltage CLK_IN Input I IH High Current OE, PLL_SEL CLK_IN Input I IL Low Current OE, PLL_SEL V Output High ...

Page 5

ICS810251I Data Sheet Table 4B. AC Characteristics, V Symbol Parameter f Input Reference Frequency REF f VCXO-PLL Frequency VCO f Output Frequency OUT t Cycle-to-Cycle Jitter; NOTE 1 JIT(CC) RMS Phase Jitter (Random); tjit NOTE 2 t Period jitter JIT(PER) ...

Page 6

ICS810251I Data Sheet Typical Phase Noise at 25MHz (3.3V) Typical Phase Noise at 25MHz (2.5V) ICS810251AGI REVISION A JULY 28, 2009 VCXO AND SYNCHRONOUS ETHERNET JITTER ATTENUATOR Ethernet Filter 1kHz to 1MHz = 0.22ps (typical) Raw Phase Noise Data Phase ...

Page 7

ICS810251I Data Sheet Parameter Measurement Information 1.65V¬±5 1.65V¬±5 V DD, V DDO V DDA LVCMOS GND -1.65V¬±5 3.3V Core/3.3V LVCMOS Output Load AC Test Circuit V V DDO 2 Q ➤ ➤ ➤ tcycle n | tjit(cc) = tcycle n ...

Page 8

ICS810251I Data Sheet Parameter Measurement Information, continued V DDO PERIOD 100% odc = t PERIOD Output Duty Cycle/Pulse Width/Period Application Information Recommendations for Unused Input Pins Inputs: LVCMOS Control Pins All control ...

Page 9

ICS810251I Data Sheet Schematic Example Figure 1 shows an example of the 810251I application schematic. In this example, the device is operated either at V decoupling capacitors should be located as close as possible to the power pin. The input ...

Page 10

ICS810251I Data Sheet VCXO-PLL E C XTERNAL OMPONENTS Choosing the correct external components and having a proper printed circuit board (PCB) layout is a key task for quality operation of the VCXO-PLL. In choosing a crystal, special precaution must be ...

Page 11

ICS810251I Data Sheet Power Considerations This section provides information on power dissipation and junction temperature for the ICS810251I. Equations and example calculations are also provided. 1. Power Dissipation. The total power dissipation for the ICS810251I is the sum of the ...

Page 12

ICS810251I Data Sheet Reliability Information θ Table 6. vs. Air Flow Table for a 16 Lead TSSOP JA Meters per Second Multi-Layer PCB, JEDEC Standard Test Boards Transistor Count The transistor count for ICS810251I: 937 Package Outline and Package Dimensions ...

Page 13

ICS810251I Data Sheet Ordering Information Table 8. Ordering Information Part/Order Number Marking 810251AGILF 10251AIL 810251AGILFT 10251AIL 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 ...

Page 14

ICS810251I Data Sheet Revision History Sheet Rev Table Page Description of Change 91 Updated Figure 1, Schematic layout. 10 VCXO-PLL External Components section, reworded second from last paragraph “The frequency of oscillation in the third overtone mode....” ...

Page 15

ICS810251I Data Sheet 6024 Silver Creek Valley Road Sales 800-345-7015 (inside USA) San Jose, California 95138 +408-284-8200 (outside USA) Fax: 408-284-2775 www.IDT.com/go/contactIDT DISCLAIMER Integrated Device Technology, Inc. (IDT) and its subsidiaries reserve the right to modify the products and/or specifications ...

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