ICS8536-02 IDT [Integrated Device Technology], ICS8536-02 Datasheet

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ICS8536-02

Manufacturer Part Number
ICS8536-02
Description
Low Skew, 1-to-6, Dual Crystal/LVCMOS-to-3.3V, 2.5V LVPECL Fanout Buffer
Manufacturer
IDT [Integrated Device Technology]
Datasheet
XTAL_OUT0
XTAL_OUT1
Block Diagram
ICS8536AG-02 REVISION A JULY 21, 2010
General Description
The ICS8536-02 is a low skew, high performance 1-to-6, Dual
Crystal or LVCMOS Input-to-3.3V, 2.5V LVPECL Fanout Buffer. The
ICS8536-02 has selectable crystal or single ended clock input. The
single ended clock input accepts LVCMOS or LVTTL input levels and
translates them to LVPECL levels. The output enable is internally
synchronized to eliminate runt pulses on the outputs during
asynchronous assertion/deassertion of the clock enable pin.
Guaranteed output and part-to-part skew characteristics make the
ICS8536-02 ideal for those applications demanding well defined
performance and repeatability.
CLK_SEL0
CLK_SEL1
XTAL_IN0
XTAL_IN1
CLK_EN
CLK0
Pullup
Pulldown
Pulldown
Pulldown
OSC
OSC
00
01
1X
Low Skew, 1-to-6, Dual Crystal/LVCMOS-to-
3.3V, 2.5V LVPECL Fanout Buffer
D
LE
Q
6 LVPECL Outputs
Q0
nQ0
Q5
nQ5
1
Features
Six 3.3V, 2.5V differential LVPECL output pairs
Selectable crystal oscillator interface
or LVCMOS/LVTTL single-ended input
Maximum output frequency: 266MHz
Crystal frequency range: 14MHz – 40MHz
Output skew: 55ps (maximum)
Part-to-part skew: 500ps (maximum)
Propagation delay: 1.85ns (maximum), 3.3V
Additive phase jitter, RMS: 0.149ps (typical)
Full 3.3V or 2.5V supply modes
0°C to 70°C ambient operating temperature
Industrial temperature information available upon request
Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
4.4mm x 7.8mm x 0.925mm package body
Pin Assignment
XTAL_OUT0
CLK_SEL0
XTAL_IN0
CLK_EN
nQ2
nQ1
nQ0
V
V
24-Lead TSSOP
Q2
Q1
Q0
CC
EE
ICS8536-02
G Package
Top View
1
2
3
4
5
6
7
8
9
10
11
12
©2010 Integrated Device Technology, Inc.
24
23
22
21
20
19
18
17
16
15
14
13
Q3
nQ3
V
Q4
nQ4
V
Q5
CLK_SEL1
XTAL_IN1
XTAL_OUT1
CC
CC
ICS8536-02
DATA SHEET

Related parts for ICS8536-02

ICS8536-02 Summary of contents

Page 1

... The ICS8536- low skew, high performance 1-to-6, Dual Crystal or LVCMOS Input-to-3.3V, 2.5V LVPECL Fanout Buffer. The ICS8536-02 has selectable crystal or single ended clock input. The single ended clock input accepts LVCMOS or LVTTL input levels and translates them to LVPECL levels. The output enable is internally synchronized to eliminate runt pulses on the outputs during asynchronous assertion/deassertion of the clock enable pin ...

Page 2

... ICS8536-02 Data Sheet Table 1. Pin Descriptions Number Name 1, 2 nQ2, Q2 Output 3, 19 Power nQ1, Q1 Output 6 V Power nQ0, Q0 Output 9, CLK_SEL0, Input 16 CLK_SEL1 10, XTAL_IN0, Input 11 XTAL_OUT0 12 CLK_EN Input 13 CLK0 Input 14, XTAL_IN1, Input 15 XTAL_OUT1 17, 18 nQ5, Q5 Output 20, 21 nQ4, Q4 Output ...

Page 3

... ICS8536-02 Data Sheet Function Tables Table 3. Control Input Function Table CLK_EN CLK_SEL1 After CLK_EN switches, the clock outputs are disabled or enabled following a rising and falling input clock edge as show in Figure 1. In the active mode, the state of the outputs are a function of the selected clock input. ...

Page 4

... ICS8536-02 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 ...

Page 5

... ICS8536-02 Data Sheet Table 4D. LVPECL DC Characteristics, V Symbol Parameter V Output High Voltage; NOTE Output Low Voltage; NOTE Peak-to-Peak Output Voltage Swing SWING Ω NOTE 1: Outputs terminated with 50 Table 4E. LVPECL DC Characteristics, V Symbol Parameter V Output High Voltage; NOTE Output Low Voltage; NOTE 1 ...

Page 6

... ICS8536-02 Data Sheet AC Electrical Characteristics Table 6A. AC Characteristics, V Symbol Parameter f Output Frequency OUT t Propagation Delay; NOTE 1 PD Buffer Additive Phase Jitter, RMS; tjit NOTE 2 tsk(o) Output skew; NOTE 3, 4 tsk(pp) Part-to-Part skew; NOTE Output Rise/Fall Time R F odc ...

Page 7

... ICS8536-02 Data Sheet Additive Phase Jitter The spectral purity in a band at a specific offset from the fundamental compared to the power of the fundamental is called the dBc Phase Noise. This value is normally expressed using a Phase noise plot and is most often the specified plot in many applications. ...

Page 8

... ICS8536-02 Data Sheet Parameter Measurement Information LVPECL V EE -1.3V ± 0.165V 3.3V LVPECL Output Load AC Test Circuit Par t 1 nQx Qx Par t 2 nQy Qy tsk(pp) Part-to-Part Skew CLK0 nQ[0:5] Q[0: Propagation Delay ICS8536AG-02 REVISION A JULY 21, 2010 1-TO-6, DUALCRYSTAL/LVCMOS-TO-3.3V, 2.5V LVPECL FANOUT BUFFER 2V SCOPE V CC ...

Page 9

... ICS8536-02 Data Sheet Parameter Measurement Information, continued nQ[0:5] 80% 20% Q[0: Output Rise/Fall Time Application Information 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 protection, a 1kΩ ...

Page 10

... ICS8536-02 Data Sheet Crystal Input Interface The ICS8536-02 has been characterized with 18pF parallel resonant crystals. The capacitor values shown in Figure 2 below were determined using an 18pF parallel resonant crystal and were chosen to minimize the ppm error. Overdriving the XTAL Interface The XTAL_IN input can accept a single-ended LVCMOS signal through an AC coupling capacitor ...

Page 11

... ICS8536-02 Data Sheet Termination for 3.3V LVPECL Outputs The clock layout topology shown below is a typical termination for LVPECL outputs. The two different layouts mentioned are recommended only as guidelines. The differential outputs are low impedance follower outputs that generate ECL/LVPECL compatible outputs. Therefore, terminating resistors (DC current path to ground) or current sources must be used for functionality. These outputs are designed to drive 50Ω ...

Page 12

... ICS8536-02 Data Sheet Termination for 2.5V LVPECL Outputs Figure 5A and Figure 5B show examples of termination for 2.5V LVPECL driver. These terminations are equivalent to terminating 50Ω – 2V. For V = 2.5V, the 2.5V CCO R1 250 50Ω 50Ω 2.5V LVPECL Driver Figure 5A. 2.5V LVPECL Driver Termination Example V = 2.5V CCO 50Ω ...

Page 13

... Equations and example calculations are also provided. 1. Power Dissipation. The total power dissipation for the ICS8536-02 is the sum of the core power plus the power dissipated in the load(s). The following is the power dissipation for V NOTE: Please refer to Section 3 for details on calculating power dissipated in the load. ...

Page 14

... ICS8536-02 Data Sheet 3. Calculations and Equations. The purpose of this section is to calculate the power dissipation for the LVPECL output pair. LVPECL output driver circuit and termination are shown in Figure Figure 6. LVPECL Driver Circuit and Termination T o calculate worst case power dissipation into the load, use the following equations which assume a 50Ω load, and a termination voltage of V – ...

Page 15

... Air Flow Table for a 24 Lead TSSOP JA Meters per Second Multi-Layer PCB, JEDEC Standard Test Boards Transistor Count The transistor count for ICS8536-02 is: 467 Package Outline and Package Dimensions Package Outline - G Suffix for 24 Lead TSSOP ICS8536AG-02 REVISION A JULY 21, 2010 1-TO-6, DUALCRYSTAL/LVCMOS-TO-3.3V, 2.5V LVPECL FANOUT BUFFER θ ...

Page 16

... ICS8536-02 Data Sheet Ordering Information Table 10. Ordering Information Part/Order Number Marking 8536AG-02 ICS8536AG-02 8536AG-02T ICS8536AG-02 8536AG-02LF ICS8536AG-02L 8536AG-02LFT ICS8536AG-02L 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 17

... ICS8536-02 Data Sheet We’ve Got Your Timing Solution 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 described herein at any time and at IDT’s sole discretion. All information in this document, including descriptions of product features and performance, is subject to change without notice ...

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