851021AYLF IDT, 851021AYLF Datasheet

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851021AYLF

Manufacturer Part Number
851021AYLF
Description
Clock Drivers & Distribution
Manufacturer
IDT
Datasheet

Specifications of 851021AYLF

Product Category
Clock Drivers & Distribution
Rohs
yes
Part # Aliases
ICS851021AYLF
ICS851021AY REVISION B MARCH 3, 2010
G
set the value of the current supplied to an external load/termina-
tion resistor. The load resistor value is chosen to equal the value
of the characteristic line impedance of 50Ω. The ICS851021 is
characterized at an operating supply voltage of 3.3V.
The 0.7V differential outputs, accurate crossover voltage and
duty cycle makes the ICS851021 ideal for interfacing to PCI
Express and FBDIMN applications.
B
HiPerClockS™
IC S
LOCK
ENERAL
nCLK
IREF
CLK
D
nQ10
The ICS851021 is a 1-to-21 Differential Current
Mode 0.7V HCSL Fanout Buffer. The ICS851021 is
designed to translate any differential input signal
levels to 0.7V differential current mode HCSL out-
put levels. An external reference resistor is used to
nQ0
nQ1
nQ2
nQ3
nQ4
nQ5
nQ6
nQ7
nQ8
nQ9
Q10
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
IAGRAM
D
ESCRIPTION
1-to-21, Differential Current Mode
0.7V HCSL Fanout Buffer
Q20
nQ20
Q19
nQ19
Q18
nQ18
Q17
nQ17
Q16
nQ16
Q15
nQ15
Q14
nQ14
Q13
nQ13
Q12
nQ12
Q11
nQ11
1
F
• Twenty-one 0.7V differential HCSL clock outputs
• Translates any differential input signal (LVPECL, LVHSTL,
• Maximum output frequency: 250MHz
• Single or dual output drive
• Output skew: 395ps (maximum)
• Part-to-part skew: 335ps (maximum)
• Additive phase jitter, RMS: 0.20ps (typical)
• Output drift: 140ps (maximum)
• V
• 3.3V operating supply
• 0°C to 70°C ambient operating temperature
• Available in both standard (RoHS 5) and lead-free (RoHS 6)
GND
nQ3
nQ4
nQ5
nQ6
nQ7
nQ8
LVDS, 0.7V DIFF) to differential current mode HCSL levels
without external bias networks
packages
EATURES
V
V
V
P
Q3
Q4
Q5
Q6
Q7
Q8
OH
DD
DD
DD
: 850mV (maximum)
IN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
A
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
10mm x 10mm x 1.0mm package body
SSIGNMENT
64-Lead TQFP, E-Pad
ICS851021
Y package
Top View
©2010 Integrated Device Technology, Inc.
ICS851021
DATA SHEET
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
nQ18
Q18
V
nQ17
Q17
GND
nQ16
Q16
V
nQ15
Q15
nQ14
Q14
V
nQ13
Q13
DD
DD
DD

Related parts for 851021AYLF

851021AYLF Summary of contents

Page 1

Differential Current Mode 0.7V HCSL Fanout Buffer G D ENERAL ESCRIPTION The ICS851021 is a 1-to-21 Differential Current IC S Mode 0.7V HCSL Fanout Buffer. The ICS851021 is HiPerClockS™ designed to translate any differential input signal levels to 0.7V ...

Page 2

ICS851021 Data Sheet ABLE IN ESCRIPTIONS ...

Page 3

ICS851021 Data Sheet BSOLUTE AXIMUM ATINGS Supply Voltage Inputs Outputs Package Thermal Impedance, θ JA Storage Temperature, T STG T 2A ABLE OWER UPPLY HARACTERISTICS S y ...

Page 4

ICS851021 Data Sheet ABLE HARACTERISTICS ...

Page 5

ICS851021 Data Sheet 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 ...

Page 6

ICS851021 Data Sheet P ARAMETER 3.3V V 33Ω DD 49.9Ω HCSL 33Ω GND 49.9Ω 3. UTPUT OAD EST IRCUIT nQx Qx nQy Qy tsk( UTPUT KEW Rise Edge Rate +150mV 0.0V -150mV Q ...

Page 7

ICS851021 Data Sheet P ARAMETER CROSS MEDIAN ESUREMENT OINTS FOR ISE 140mV CROSS_DELTA ESUREMENT OINTS FOR ELTA Clock Period (Differential) Positive Duty Cycle ...

Page 8

ICS851021 Data Sheet IRING THE IFFERENTIAL NPUT TO Figure 2 shows how a differential input can be wired to accept single ended levels. The reference voltage V by the bias resistors R1 and R2. The bypass capacitor ...

Page 9

... DIFFERENTIAL CURRENT MODE 0.7V HCSL FANOUT BUFFER only. Please consult with the vendor of the driver component to confirm the driver termination requirements. For example in Figure 3A, the input termination applies for IDT open emitter LVHSTL drivers. If you are using an LVHSTL driver from another vendor, use their termination recommendation. ...

Page 10

ICS851021 Data Sheet EPAD HERMAL ELEASE ATH In order to maximize both the removal of heat from the package and the electrical perfor mance, a land patter n must be incorporated on the Printed Circuit Board (PCB) ...

Page 11

ICS851021 Data Sheet R T ECOMMENDED ERMINATION Figure 5A is the recommended termination for applications which require the receiver and driver separate PCB. All traces should be 50Ω impedance. 0.7V Differential HCSL Clock Driver Figure 5B ...

Page 12

ICS851021 Data Sheet This section provides information on power dissipation and junction temperature for the ICS851021. Equations and example calculations are also provided. 1. Power Dissipation. The total power dissipation for the ICS851021 is the sum of the core power ...

Page 13

ICS851021 Data Sheet 3. Calculations and Equations. The purpose of this section is to calculate power dissipation on the IC per HCSL output pair. HCSL output driver circuit and termination are shown in Figure 6. R REF = Ω 475 ...

Page 14

ICS851021 Data Sheet θ ABLE VS IR LOW ABLE FOR JA Multi-Layer PCB, JEDEC Standard Test Boards T C RANSISTOR OUNT The transistor count for ICS851021 is: 843 ICS851021AY REVISION B MARCH 3, 2010 ...

Page 15

ICS851021 Data Sheet ACKAGE UTLINE UFFIX FOR T ABLE Reference Document: JEDEC Publication 95, MS-026 ICS851021AY REVISION B MARCH 3, 2010 1-TO-21, DIFFERENTIAL CURRENT MODE 0.7V HCSL FANOUT BUFFER TQFP, E-P EAD AD ...

Page 16

... Any other applications such as those requiring extended temperature ranges, 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 ...

Page 17

ICS851021 Data Sheet ...

Page 18

... This document is presented only as a guide and does not convey any license under intellectual property rights of IDT or any third parties. IDT’s products are not intended for use in life support systems or similar devices where the failure or malfunction of an IDT product can be reasonably expected to significantly affect the health or safety of users. ...

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