ics8535-11 Holt Integrated Circuits, Inc., ics8535-11 Datasheet

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ics8535-11

Manufacturer Part Number
ics8535-11
Description
Skew, 1-to-4, Crystal Oscillator/ Lvcmos-to-3.3v Lvpecl Fanout Buffer
Manufacturer
Holt Integrated Circuits, Inc.
Datasheet
B
8535AG-11
G
able single ended 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 out-
puts during asynchronous assertion/deassertion of the clock
enable pin.
Guaranteed output and part-to-part skew characteristics
make the ICS8535-11 ideal for those applications demand-
ing well defined performance and repeatability.
HiPerClockS™
,&6
LOCK
ENERAL
CLK_SEL
CLK_EN
XTAL1
XTAL2
CLK
The ICS8535-11 is a low skew, high performance
1-to-4 3.3V Crystal Oscillator/LVCMOS-to-3.3V
LVPECL fanout buffer and a member of the
HiPerClockS™ family of High Performance Clock
Solutions from ICS. The ICS8535-11 has select-
D
IAGRAM
D
ESCRIPTION
0
1
D
LE
Q
www.icst.com/products/hiperclocks.html
Q0
nQ0
Q1
nQ1
Q2
nQ2
Q3
nQ3
LVCMOS-
1
F
P
4 differential 3.3V LVPECL outputs
Selectable CLK or crystal inputs
CLK can accept the following input levels: LVCMOS, LVTTL
Maximum output frequency up to 266MHz
Output skew: 35ps (maximum)
Part-to-part skew: 150ps (maximum)
Propagation delay: 2.4ns (maximum)
3.3V operating supply
0°C to 70°C ambient operating temperature
Industrial Temperature information available upon request
EATURES
IN
L
OW
A
S
SSIGNMENT
6.5mm x 4.4mm x 0.92mm Package Body
TO
KEW
-3.3V LVPECL F
CLK_SEL
CLK_EN
, 1-
XTAL1
XTAL2
CLK
V
V
nc
nc
nc
EE
CC
20-Lead TSSOP
ICS8535-11
TO
G Package
-4, C
Top View
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
RYSTAL
ICS8535-11
Q0
nQ0
V
Q1
nQ1
Q2
nQ2
V
Q3
nQ3
CC
CC
ANOUT
O
REV. B JULY 27, 2001
SCILLATOR
B
UFFER
/

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ics8535-11 Summary of contents

Page 1

... G D ENERAL ESCRIPTION The ICS8535- low skew, high performance ,&6 1-to-4 3.3V Crystal Oscillator/LVCMOS-to-3.3V HiPerClockS™ LVPECL fanout buffer and a member of the HiPerClockS™ family of High Performance Clock Solutions from ICS. The ICS8535-11 has select- able single ended clock or crystal inputs. The single ended clock input accepts LVCMOS or LVTTL input levels and translate them to 3 ...

Page 2

... www.icst.com/products/hiperclocks.html 2 ICS8535- - KEW TO RYSTAL SCILLATOR -3.3V LVPECL F TO ANOUT ...

Page 3

... CLK_EN T D IGURE IMING IAGRAM www.icst.com/products/hiperclocks.html 3 ICS8535- - RYSTAL SCILLATOR -3.3V LVPECL F B ANOUT ...

Page 4

... www.icst.com/products/hiperclocks.html 4 ICS8535- - KEW TO RYSTAL SCILLATOR -3.3V LVPECL F TO ANOUT 70° ...

Page 5

... www.icst.com/products/hiperclocks.html 5 ICS8535- - RYSTAL SCILLATOR -3.3V LVPECL F B ANOUT ...

Page 6

... -1.3V ± 0.135V EE Qx nQx Qy nQy 8535AG- KEW LVCMOS EASUREMENT NFORMATION nQx IGURE HARACTERIZATION EST tsk( IGURE UTPUT KEW www.icst.com/products/hiperclocks.html 6 ICS8535- - RYSTAL SCILLATOR -3.3V LVPECL F B ANOUT SCOPE Qx IRCUIT REV. B JULY 27, 2001 / UFFER ...

Page 7

... NPUT AND UTPUT ISING IGURE ROPAGATION ELAY Pulse Width t PERIOD t PW odc = t PERIOD odc & t IGURE PERIOD www.icst.com/products/hiperclocks.html 7 ICS8535- - RYSTAL SCILLATOR -3.3V LVPECL F ANOUT 80 20 ALL IME REV. B JULY 27, 2001 / B UFFER ...

Page 8

... For applications requiring highly accurate clock frequencies, the output frequency can be fine tuned by inserting a small series capacitor C1 at the XTAL1 input (Pin 6 for ICS8535-11) as shown in Figure 7. This fine tuning approach can be applied in either parallel or series crystal. The C1 value depends on the crystal type, frequency and the board layout. The parallel crystal fine tuning results in smaller ppm and better performance ...

Page 9

... Crystal Frequency (MHz UGGESTED ERIES APACITOR FOR Series Capacitor, C1 (pF CCURACY FOR ARALLEL RYSTAL www.icst.com/products/hiperclocks.html 9 ICS8535- - RYSTAL SCILLATOR -3.3V LVPECL F B ANOUT 24.000 ARALLEL RYSTAL 19.44MHz 16.666MHz 60 15.00MHz SING ...

Page 10

... Equations and example calculations are also provided. 1. Power Dissipation. The total power dissipation for the ICS8535-11 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 11

... Total Power Dissipation per output pair = Pd_H + Pd_L = 30.2mW 8535AG- KEW LVCMOS LVPECL D C RIVER IRCUIT AND - V ) CC_MAX OH_MAX - V ) CC_MAX OL_MAX – 1.0V CC_MAX = 2.465V OH_MAX – 1.7V CC_MAX = 1.765V OL_MAX www.icst.com/products/hiperclocks.html 11 ICS8535- - RYSTAL SCILLATOR -3.3V LVPECL F ANOUT V OUT ERMINATION REV. B JULY 27, 2001 / B UFFER ...

Page 12

... Single-Layer PCB, JEDEC Standard Test Boards 114.5°C/W 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 RANSISTOR OUNT The transistor count for ICS8535-11 is: 428 8535AG- LVCMOS- R ...

Page 13

... ° www.icst.com/products/hiperclocks.html 13 ICS8535- - RYSTAL SCILLATOR -3.3V LVPECL F B ANOUT UFFER ° REV. B JULY 27, 2001 / ...

Page 14

... www.icst.com/products/hiperclocks.html 14 ICS8535- - KEW TO RYSTAL SCILLATOR -3.3V LVPECL F TO ANOUT ° ...

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