ics85354a Integrated Device Technology, ics85354a Datasheet

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ics85354a

Manufacturer Part Number
ics85354a
Description
Differential-to-lvpecl/ecl Multiplexer
Manufacturer
Integrated Device Technology
Datasheet
B
nINB
The Preliminary Information presented herein represents a product in pre-production. The noted characteristics are based on initial product
characterization and/or qualification. Integrated Device Technology, Incorporated (IDT) reserves the right to change any circuitry or specifica-
tions without notice.
85354AK-01
G
switches one input to one of two outputs. This device may
be useful for multiplexing multi-rate Ethernet Phys which
have 100Mbit and 1000Mbit transmit/receive pairs onto an
optical SFP module which has a single transmit/receive
pair. A 3
the output of a phy transmit pair to be routed to the phy
input pair. For examples, please refer to the Application
Block diagrams on pages 2-3 of the data sheet.
The ICS85354-01 is optimized for applications requiring
very high performance and has a maximum operating
frequency in 2.5GHz. The device is packaged in a small,
3mm x 3mm VFQFN package, making it ideal for use on
space-constrained boards.
nQB
HiPerClockS™
INB
QB
ICS
LOCK
ENERAL
rd
D
The ICS85354-01 is a 2:1/1:2 Multiplexer and
a member of the HiPerClockS
performance clock solutions from IDT. The 2:1
Multiplexer allows one of 2 inputs to be
selected onto one output pin and the 1:2 MUX
mode allows loop back testing and allows
IAGRAM
D
ESCRIPTION
SELA
0
1
PRELIMINARY
TM
family of high
SELB
0
1
D
1
IFFERENTIAL
F
Dual 2:1/1:2 MUX
Threee differential LVPECL outputs
Three differential LVPECL clock inputs
CLKx pair can accept the following differential input levels:
LVPECL, LVDS, CML
Loopback test mode available
Maximum output frequency: 2.5GHz
Part-to-part skew: 85ps (typical)
Additive jitter, RMS: 0.05ps (typical)
Propagation delay: 440ps (typical)
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 (RoHS5) and lead-free (RoHS 6)
packages
EATURES
CC
CC
= 2.375V to 3.465V, V
= 0V, V
LOOP0
LOOP1
INA0
nINA0
QA0
nQA0
INA1
nINA1
QA1
nQA1
EE
-
= -3.465V to -2.375V
TO
-LVPECL/ECL M
EE
P
3mm x 3mm x 0.925 package body
= 0V
nQA0
nQA1
IN
QA0
QA1
ICS85354-01
A
ICS85354-01
16-Lead VFQFN
1
2
3
4
SSIGNMENT
16 15 14 13
5
K Package
Top View
D
6
REV. A JANUARY 16, 2008
UAL
7
ULTIPLEXER
8
12
11
10
2:1/1:2
9
INA0
nINA0
INA1
nINA1

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ics85354a Summary of contents

Page 1

... INB nINB 0 QB nQB 1 SELA The Preliminary Information presented herein represents a product in pre-production. The noted characteristics are based on initial product characterization and/or qualification. Integrated Device Technology, Incorporated (IDT) reserves the right to change any circuitry or specifica- tions without notice. 85354AK-01 PRELIMINARY D - IFFERENTIAL F ...

Page 2

OST US DAPTER OARDS FOR Host Adapter Board Protocol SerDes Controller PCI Bus 85354AK-01 PRELIMINARY D IFFERENTIAL OUTING ETWEEN NTERNAL AND INB nINB nQB 1 1 SELA 2 ICS85354-01 D ...

Page 3

WAPPABLE INKS TO EDUNDANT INB TX nINB SerDes Q B nQB RX Linecard 85354AK-01 PRELIMINARY D IFFERENTIAL WITCH ABRIC ARDS SELB LOOP SELA LOOP 1 ICS85354-01 ...

Page 4

ABLE IN ESCRIPTIONS ...

Page 5

BSOLUTE AXIMUM ATINGS Supply Voltage Negative Supply Voltage Inputs, V (LVPECL mode) I Inputs, V (ECL mode) I Outputs Continuous Current Surge Current Operating Temperature Range, TA -40°C to +85°C Storage ...

Page 6

T 4C. LVPECL DC C ABLE HARACTERISTICS ...

Page 7

2.375V ABLE HARACTERISTICS ...

Page 8

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 ...

Page 9

P ARAMETER LVPECL V EE -0.375V to -1.465V UTPUT OAD EST IRCUIT nQx PART 1 Qx nQy PART 2 Qy tsk(pp ART TO ART KEW 80% Clock 20% ...

Page 10

IRING THE IFFERENTIAL NPUT TO Figure 1 shows how the differential input can be wired to accept single ended levels. The reference voltage V_REF = V generated by the bias resistors R1, R2 and C1. This bias ...

Page 11

LVPECL IFFERENTIAL LOCK The IN/nIN accepts LVPECL, CML, SSTL and other differen- tial signals. Both V and V must meet the V SWING OH input requirements. Figures show interface ex- amples for the HiPerClockS IN/nIN ...

Page 12

T 3.3V LVPECL O ERMINATION FOR The clock layout topology shown below is a typical termina- tion for LVPECL outputs. The two different layouts mentioned are recommended only as guidelines. FOUT and nFOUT are low impedance follower outputs that generate ...

Page 13

T 2.5V LVPECL O ERMINATION FOR Figure 4A and Figure 4B show examples of termination for 2.5V LVPECL driver. These terminations are equivalent to ter- minating 2V. For V = 2.5V, the 2.5V ...

Page 14

This section provides information on power dissipation and junction temperature for the ICS85354-01. Equations and example calculations are also provided. 1. Power Dissipation. The total power dissipation for the ICS85354-01 is the sum of the core power plus the power ...

Page 15

Calculations and Equations. The purpose of this section is to derive the power dissipated into the load. LVPECL output driver circuit and termination are shown in Figure calculate worst case power dissipation into the load, use ...

Page 16

ABLE VS IR LOW ABLE FOR JA Multi-Layer PCB, JEDEC Standard Test Boards T C RANSISTOR OUNT The transistor count for ICS85354-01 is: 210 85354AK-01 PRELIMINARY D IFFERENTIAL R I ELIABILITY NFORMATION 16 L ...

Page 17

ACKAGE UTLINE UFFIX FOR T Reference Document: JEDEC Publication 95, MO-220 85354AK-01 PRELIMINARY D IFFERENTIAL VFQFN EAD ABLE ACKAGE IMENSIONS ...

Page 18

... While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology, Incorporated (IDT) assumes no responsibility for either its use or for infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial applications ...

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