ICS85357AGI-01T IDT, Integrated Device Technology Inc, ICS85357AGI-01T Datasheet

ICS85357AGI-01T

Manufacturer Part Number
ICS85357AGI-01T
Description
Manufacturer
IDT, Integrated Device Technology Inc
Type
Clock Multiplexerr
Datasheet

Specifications of ICS85357AGI-01T

Number Of Clock Inputs
4/2
Mode Of Operation
Differential
Output Frequency
750MHz
Output Logic Level
ECL/LVPECL
Operating Supply Voltage (min)
-3.135/3.135V
Operating Supply Voltage (typ)
-3.3/3.3V
Operating Supply Voltage (max)
-3.465/3.465V
Package Type
TSSOP
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
20
Lead Free Status / RoHS Status
Not Compliant
General Description
The ICS85357I-01 is a 4:1 or 2:1 Differential-to-3.3V
LVPECL / ECL clock multiplexer which can operate up to
750MHz. The ICS85357I-01 has 4 selectable clock inputs.
The CLK, nCLK pair can accept most standard differential
input levels. The device can operate using a 3.3V LVPECL
(V
0V, V
architecture and low propagation delay make it ideal for
use in clock distribution circuits. The select pins have
inter nal pulldown resistors. Leaving one input
unconnected (pulled to logic low by the inter nal resistor)
will transfor m the device into a 2:1 multiplexer. The SEL1
pin is the most significant bit and the binar y number
applied to the select pins will select the same numbered
data input (i.e., 00 selects CLK0, nCLK0).
ICS85357AGI-01 REVISION A SEPTEMBER 1, 2010
Block Diagram
nCLK0
nCLK1
nCLK2
nCLK3
EE
CLK0
CLK1
CLK2
CLK3
= 0V, V
EE
= -3.135V to -3.465V). The fully differential
CC
= 3.135V to 3.465V) or 3.3V ECL (V
SEL1
4:1 or 2:1, Differential-to-3.3V LVPECL/ECL
Clock Multiplexer
00
01
10
11
SEL0
Q0
nQ0
CC
=
1
Features
High speed differential multiplexer. The device can be configured
as either a 4:1 or 2:1 multiplexer
One differential 3.3V LVPECL output
Four selectable CLK, nCLK inputs
CLK, nCLK pair can accept the following differential
input levels: LVDS, LVPECL, LVHSTL, SSTL, HCSL
Maximum output frequency: 750MHz
Translates any single ended input signal to 3.3V
LVPECL levels with resistor bias on nCLKx input
Part-to-part skew: 415ps (maximum)
Propagation delay: 1.5ns (maximum)
LVPECL mode operating voltage supply range:
V
ECL mode operating voltage supply range:
V
-40°C to 85°C ambient operating temperature
Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
CC
CC
= 3.135V to 3.465V, V
= 0V, V
4.40mm x 6.50mm x 0.90mm body package
Pin Assignment
EE
= -3.135V to -3.465V
nCLK3
nCLK0
nCLK1
nCLK2
CLK0
CLK1
CLK2
CLK3
V
V
20 Lead TSSOP
CC
EE
ICS85357I-01
G Package
Top View
EE
1
2
3
4
5
6
7
8
9
10
= 0V
©2010 Integrated Device Technology, Inc.
20
19
18
17
16
15
14
13
12
11
V
SEL1
SEL0
V
Q0
nQ0
V
nc
V
CC
CC
CC
EE
ICS85357I-01
DATA SHEET

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ICS85357AGI-01T Summary of contents

Page 1

... CLK2 10 nCLK2 CLK3 11 nCLK3 SEL1 SEL0 ICS85357AGI-01 REVISION A SEPTEMBER 1, 2010 Features • High speed differential multiplexer. The device can be configured as either a 4:1 or 2:1 multiplexer • One differential 3.3V LVPECL output • Four selectable CLK, nCLK inputs • CLK, nCLK pair can accept the following differential ...

Page 2

... Input Pulldown Resistor PULLDOWN Function Table Table 3. Control Input Function Table Inputs SEL1 SEL0 ICS85357AGI-01 REVISION A SEPTEMBER 1, 2010 Type Description Positive supply pins. Input Pulldown Non-inverting differential clock input. Input Pullup Inverting differential clock input. Input Pulldown Non-inverting differential clock input. Input Pullup Inverting differential clock input ...

Page 3

... Peak to Peak Voltage; NOTE 1 PP Common Mode Input Voltage; V CMR NOTE 1, 2 NOTE 1: V should not be less than -0.3V. IL NOTE 2: Common Mode input voltage is defined as V ICS85357AGI-01 REVISION A SEPTEMBER 1, 2010 4:1 OR 2:1, DIFFERENTIAL-TO-3.3V LVPECL CLOCK MULTIPLEXER Rating 4.6V -0. 0.5V CC 50mA 100mA 73.2°C/W (0 lfpm) -65° ...

Page 4

... NOTE 2: Defined as skew between outputs on different devices operating at the same supply voltage, same temperature, same frequency and with equal load conditions. Using the same type of inputs on each device, the outputs are measured at the differential cross points. NOTE 3: This parameter is defined in accordance with JEDEC Standard 65. ICS85357AGI-01 REVISION A SEPTEMBER 1, 2010 = 3.3V ± 5 0V, T ...

Page 5

... Propagation Delay nQ0 PERIOD t PW odc = t PERIOD Output Duty Cycle/Pulse Width/Period ICS85357AGI-01 REVISION A SEPTEMBER 1, 2010 SCOPE Qx nQx Differential Input Level nQ0 nQ0 Part-to-Part Skew nQ0 Q0 x 100% Output Rise/Fall Time 5 4:1 OR 2:1, DIFFERENTIAL-TO-3.3V LVPECL CLOCK MULTIPLEXER V CC nCLK[0:3] V Cross Points ...

Page 6

... This can be done in one of two ways. First, R3 and R4 in parallel should equal the transmission Figure 1. Recommended Schematic for Wiring a Differential Input to Accept Single-ended Levels ICS85357AGI-01 REVISION A SEPTEMBER 1, 2010 line impedance. For most 50Ω applications, R3 and R4 can be 100Ω ...

Page 7

... R3 and R4 can be 0Ω Figure 2E. CLK/nCLK Input Driven by a 3.3V HCSL Driver ICS85357AGI-01 REVISION A SEPTEMBER 1, 2010 Please consult with the vendor of the driver component to confirm the and V must meet the V driver termination requirements. For example, in Figure 2A, the input ...

Page 8

... Figure 3A. 3.3V LVPECL Output Termination ICS85357AGI-01 REVISION A SEPTEMBER 1, 2010 transmission lines. Matched impedance techniques should be used to maximize operating frequency and minimize signal distortion. Figures 3A and 3B show two different layouts which are recommended only as guidelines. Other suitable clock layouts may ...

Page 9

... Linear Feet per Minute Single-Layer PCB, JEDEC Standard Test Boards Multi-Layer PCB, JEDEC Standard Test Boards NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs. ICS85357AGI-01 REVISION A SEPTEMBER 1, 2010 = 3. 3.465V, which gives worst case results ...

Page 10

... Pd_H = [(V – (V – 2V))/R OH_MAX CC_MAX [(2V – 0.9V)/50Ω] * 0.9V = 19.8mW Pd_L = [(V – (V – 2V))/R OL_MAX CC_MAX [(2V – 1.7V)/50Ω] * 1.7V = 10.2mW Total Power Dissipation per output pair = Pd_H + Pd_L = 30mW ICS85357AGI-01 REVISION A SEPTEMBER 1, 2010 V OUT RL 50Ω – 0.9V CC_MAX = V – ...

Page 11

... NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs. Transistor Count The transistor count for ICS85357I-01 is: 400 Package Outline and Package Dimensions Package Outline - G Suffix for 20 Lead TSSOP ICS85357AGI-01 REVISION A SEPTEMBER 1, 2010 4:1 OR 2:1, DIFFERENTIAL-TO-3.3V LVPECL CLOCK MULTIPLEXER θ by Velocity JA ...

Page 12

... Any other applications, such as those requiring high reliability or other extraordinary environmental requirements are not recommended without additional processing by IDT. IDT reserves the right to change any circuitry or specifications without notice. IDT does not authorize or warrant any IDT product for use in life support devices or critical medical instruments. ICS85357AGI-01 REVISION A SEPTEMBER 1, 2010 4:1 OR 2:1, DIFFERENTIAL-TO-3.3V LVPECL CLOCK MULTIPLEXER Package ...

Page 13

... AC Characteristics Table - added thermal note. 6 Updated Wiring the Differential Input to Accept Single-ended Levels Updated Differential Clock Input Interface Ordering Information Table - added LF marking. Converted datasheet format. ICS85357AGI-01 REVISION A SEPTEMBER 1, 2010 4:1 OR 2:1, DIFFERENTIAL-TO-3.3V LVPECL CLOCK MULTIPLEXER 13 ©2010 Integrated Device Technology, Inc. Date 7/29/10 9/1/10 ...

Page 14

ICS85357I-01 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 ...

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