ICS8538BG-31LF IDT, Integrated Device Technology Inc, ICS8538BG-31LF Datasheet

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ICS8538BG-31LF

Manufacturer Part Number
ICS8538BG-31LF
Description
IC FANOUT BUFFER / OSC 28-TSSOP
Manufacturer
IDT, Integrated Device Technology Inc
Type
Fanout Buffer (Distribution), Multiplexerr
Series
HiPerClockS™r
Datasheet

Specifications of ICS8538BG-31LF

Number Of Circuits
1
Ratio - Input:output
2:8
Differential - Input:output
No/Yes
Input
LVCMOS, LVTTL, Crystal
Output
LVPECL
Frequency - Max
266MHz
Voltage - Supply
3.135 V ~ 3.465 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
28-TSSOP
Frequency-max
266MHz
Number Of Clock Inputs
2
Mode Of Operation
Single-Ended
Output Frequency
266MHz
Output Logic Level
LVPECL
Operating Supply Voltage (min)
3.135V
Operating Supply Voltage (typ)
3.3V
Operating Supply Voltage (max)
3.465V
Package Type
TSSOP
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Signal Type
LVCMOS/LVTTL
Mounting
Surface Mount
Pin Count
28
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
8538BG-31LF

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ICS8538BG-31LFT
Quantity:
3 000
LOW SKEW, 1-TO-8, CRYSTAL OSCILLATOR/
LVCMOS-TO-3.3V LVPECL FANOUT BUFFER
Block Diagram
XTAL_OUT
General Description
clock or crystal inputs. The single ended clock input accepts
LVCMOS or LVTTL input levels and translate them to 3.3V
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
ICS8538-31 ideal for those applications demanding well defined
performance and repeatability.
IDT™ / ICS™ LVPECL FANOUT BUFFER
HiPerClockS™
CLK_SEL
XTAL_IN
CLK_EN
ICS
CLK
Pullup
Pulldown
Pulldown
OSC
The ICS8538-31 is a low skew, high performance
1-to-8 Crystal Oscillator/LVCMOS-to-3.3V LVPECL
Fanout Buffer and a member of the HiPerClockS™
family of High Performance Clock Solutions from
IDT. The ICS8538-31 has selectable single ended
0
1
D
LE
Q
Q0
nQ0
Q1
nQ1
Q2
nQ2
Q3
nQ3
Q4
nQ4
Q5
nQ5
Q6
nQ6
Q7
nQ7
1
Features
Eight differential 3.3V LVPECL outputs
Selectable LVCMOS/LVTTL clock or crystal inputs
CLK can accept the following input levels: LVCMOS, LVTTL
Maximum output frequency: 266MHz
Crystal frequency range: 14MHz - 40MHz
Output skew: 50ps (maximum)
Part-to-part skew: 250ps (maximum)
Propagation delay: 2.2ns (maximum)
3.3V operating supply mode
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 9.7mm x 0.925
Pin Assignment
28-Lead TSSOP, 173MIL
CLK_SEL
CLK_EN
V
CLK
nQ7
nQ6
nQ5
nQ4
V
CCO
V
Q7
Q6
Q5
Q4
EE
EE
ICS8538BG-31 REV. B FEBRUARY 5, 2008
G Package
Top View
1
2
3
4
5
6
7
8
9
10
11
12
13
14
mm package body
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
XTAL_IN
XTAL_OUT
V
Q0
nQ0
V
Q1
nQ1
Q2
nQ2
V
Q3
nQ3
CC
EE
CCO
CCO
ICS8538-31

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ICS8538BG-31LF Summary of contents

Page 1

... CLK_SEL Q0 nQ0 Q1 nQ1 Q2 nQ2 Q3 nQ3 Q4 28-Lead TSSOP, 173MIL nQ4 4.4mm x 9.7mm x 0.925 Q5 nQ5 Q6 nQ6 Q7 nQ7 1 ICS8538-31 CLK XTAL_IN CLK_EN 3 26 XTAL_OUT nQ7 nQ0 CCO CCO nQ6 nQ1 nQ5 nQ2 CCO nQ4 nQ3 mm package body G Package Top View ICS8538BG-31 REV. B FEBRUARY 5, 2008 ...

Page 2

... Differential output pair. LVPECL interface levels. Differential output pair. LVPECL interface levels. Differential output pair. LVPECL interface levels. Crystal oscillator interface. XTAL_IN is the input, XTAL_OUT is the output. Positive supply pin. Test Conditions 2 Minimum Typical Maximum ICS8538BG-31 REV. B FEBRUARY 5, 2008 Units pF Ω k Ω k ...

Page 3

... Q0:Q7 0 LOW 1 HIGH IDT™ / ICS™ LVPECL FANOUT BUFFER Selected Source Q0:Q7 CLK Disabled; Low XTAL_IN, XTAL_OUT Disabled; Low CLK Enabled XTAL_IN, XTAL_OUT Enabled nQ0:nQ7 HIGH LOW 3 Outputs nQ0:nQ7 Disabled; High Disabled; High Enabled Enabled Enabled ICS8538BG-31 REV. B FEBRUARY 5, 2008 ...

Page 4

... Maximum 0.3 CC -0.3 0.8 150 5 -5 -150 = 0°C to 70°C A Minimum Typical Maximum V – 1.4 V – 0.9 CCO CCO V – 2.0 V – 1.7 CCO CCO 0.6 1.0 ICS8538BG-31 REV. B FEBRUARY 5, 2008 Units Units V V µA µA µA µA Units µA µA V ...

Page 5

... IDT™ / ICS™ LVPECL FANOUT BUFFER Test Conditions = V = 3.3V±5 0V 0°C to 70°C CCO EE A Test Conditions 20% to 80% 5 Minimum Typical Maximum Fundamental Minimum Typical Maximum 266 2.2 50 250 200 700 45 55 ICS8538BG-31 REV. B FEBRUARY 5, 2008 Units MHz Ω Units MHz ...

Page 6

... Output Rise/Fall Time IDT™ / ICS™ LVPECL FANOUT BUFFER Par t 1 nQx SCOPE Qx Qx Par t 2 nQy nQx Qy Part-to-Part Skew CLK nQ0:nQ7 Q0:Q7 Propagation Delay nQ0:nQ7 Q0: Output Duty Cycle/Pulse Width/Period 6 tsk(pp PERIOD t PW odc = x 100% t PERIOD ICS8538BG-31 REV. B FEBRUARY 5, 2008 ...

Page 7

... This can be done in one of two ways. First, R1 and R2 in parallel should equal the transmission line impedance. For most 50Ω applications, R1 and R2 can be 100Ω. This can also be accomplished by removing R1 and making R2 50Ω 0.1µf XTAL_IN R2 XTAL_OUT 7 ICS8538BG-31 REV. B FEBRUARY 5, 2008 ...

Page 8

... Other suitable clock layouts may exist and it would be recommended that the board designers simulate to guarantee compatibility across all printed circuit and clock component process variations. FIN RTT Figure 4B. 3.3V LVPECL Output Termination 8 3.3V 125 125 FOUT ICS8538BG-31 REV. B FEBRUARY 5, 2008 FIN ...

Page 9

... 3.465V * 110mA = 381.15mW EE_MAX * Pd_total + for 28 Lead TSSOP, Forced Convection θ by Velocity JA 0 82.9°C/W 49.8°C/W 9 must be used. Assuming no air flow JA 200 500 68.7°C/W 60.5°C/W 43.9°C/W 41.2°C/W ICS8538BG-31 REV. B FEBRUARY 5, 2008 ...

Page 10

... Total Power Dissipation per output pair = Pd_H + Pd_L = 30mW IDT™ / ICS™ LVPECL FANOUT BUFFER V OUT CCO = V – 0.9V CCO_MAX = V – 1.7V CO_MAX ] * (V – [(2V – CCO_MAX OH_MAX ] * (V – [(2V – CCO_MAX OL_MAX 10 – V ))/ CCO_MAX OH_MAX L CCO_MAX – V ))/ CCO_MAX OL_MAX L] CCO_MAX ICS8538BG-31 REV. B FEBRUARY 5, 2008 – OH_MAX – OL_MAX ...

Page 11

... All Dimensions in Millimeters Symbol Minimum 0.5 A2 0.80 b 0.19 c 0. 0.45 α 0° aaa Reference Document: JEDEC Publication 95, MO-153 11 ICS8538BG-31 REV. B FEBRUARY 5, 2008 500 60.5°C/W 41.2°C/W Maximum 28 1.20 0.15 1.05 0.30 0.20 9.80 6.40 Basic 4.50 0.65 Basic 0.75 8° 0.10 ...

Page 12

... ICS8538BG-31LF ICS8538BG-31LFT ICS8538BG-31LF 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 13

... AC Characteristics Table - changed Output Rise/Fall parameters from 500ps min. to 200ps min., and 850ps max. to 700ps max Power Considerations - updated Junction Temperature equation with worst case thermal resistance of 0 lfpm at 49.8°C/W. IDT™ / ICS™ LVPECL FANOUT BUFFER 13 ICS8538BG-31 REV. B FEBRUARY 5, 2008 Date 1/18/08 2/5/08 ...

Page 14

ICS8538-31 LOW SKEW, 1-TO-8, CRYSTAL OSCILLATOR/LVCMOS-TO-3.3V LVPECL FANOUT BUFFER Innovate with IDT and accelerate your future networks. Contact: www.IDT.com For Sales 800-345-7015 408-284-8200 Fax: 408-284-2775 Corporate Headquarters Integrated Device Technology, Inc. 6024 Silver Creek Valley Road San Jose, CA 95138 ...

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