Document Outline
- General Description
- Features
- Block Diagram
- Pin Assignment
- Pin Descriptions
- Pin Characteristics
- Absolute Maximum Ratings
- Power Supply DC Characteristics
- LVCMOS DC Characteristics
- LVPECL DC Characteristics
- Crystal Characteristics
- AC Characteristics
- Parameter Measurement Information
- Application Information
- Recommedations for Unused Output Pins
- Crystal Input Interface
- Frequency Stability
- Termination for 3.3V LVPECL Output
- Power Considerations
- Power Dissipation
- Junction Temperature
- Thermal Resistance
- Calculations and Equations
- LVPECL Driver Circuit & Termination Diagram
- Reliability Information
- Transistor Count
- Package Outline for 8 Lead TSSOP
- Package Dimensions for 8 Lead TSSOP
- Package Outline for 8 Lead SOIC
- Package Dimensions for 8 Lead SOIC
- Ordering Information
843AG-75
www.icst.com/products/hiperclocks.html
REV. A JANUARY 9, 2006
1
Integrated
Circuit
Systems, Inc.
ICS843-75
75MH
Z
, LVCMOS, LVPECL
D
UAL
O
UTPUT
O
SCILLATOR
G
ENERAL
D
ESCRIPTION
The ICS843-75 is a SAS/SATA Dual Output
Oscillator and a member of the HiPerClocks
TM
family of high performance devices from ICS.
The ICS843-75 uses a 25MHz crystal to
s y n t h e s i z e 7 5 M H z . T h e I C S 8 4 3 - 7 5 h a s
excellent jitter performance. The ICS843-75 is packaged
in a small 8-pin TSSOP, making it ideal for use in systems
with limited board space.
F
EATURES
One LVCMOS/LVTTL output, 15 output impedence
One LVPECL output pair
Crystal oscillator interface designed for 25MHz,
18pF parallel resonant crystal
Output frequency: 75MHz
Random jitter: 3.07ps (maximum)
Deterministic jitter: 0.13ps (maximum)
3.3V operating supply
0C to 70C ambient operating temperature
Available in both standard and lead-free RoHS-compliant
packages
HiPerClockSTM
ICS
ICS843-75
8-Lead TSSOP
4.40mm x 3.0mm x 0.925mm
package body
G Package
Top View
V
CC
XTAL_IN
XTAL_OUT
V
EE
1
2
3
4
Q1
nQ1
V
CCO
Q0
8
7
6
5
B
LOCK
D
IAGRAM
P
IN
A
SSIGNMENT
Clock
Synthesizer
XTAL_IN
XTAL_OUT
Q0
25MHz
LVCMOS
75MHz
Q1
nQ1
LVPECL
75MHz
ICS843-75
8-Lead SOIC
3.90mm x 4.92mm x 1.37mm body package
M Package
Top View
843AG-75
www.icst.com/products/hiperclocks.html
REV. A JANUARY 9, 2006
2
Integrated
Circuit
Systems, Inc.
ICS843-75
75MH
Z
, LVCMOS, LVPECL
D
UAL
O
UTPUT
O
SCILLATOR
T
ABLE
2. P
IN
C
HARACTERISTICS
T
ABLE
1. P
IN
D
ESCRIPTIONS
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843AG-75
www.icst.com/products/hiperclocks.html
REV. A JANUARY 9, 2006
3
Integrated
Circuit
Systems, Inc.
ICS843-75
75MH
Z
, LVCMOS, LVPECL
D
UAL
O
UTPUT
O
SCILLATOR
T
ABLE
3A. P
OWER
S
UPPLY
DC C
HARACTERISTICS
,
V
CC
= V
CCO
= 3.3V0.3V, T
A
= 0C
TO
70C
A
BSOLUTE
M
AXIMUM
R
ATINGS
Supply Voltage, V
CC
4.6V
Inputs, V
I
-0.5V to V
CC
+ 0.5 V
Outputs, V
O
(LVCMOS)
-0.5V to V
CCO
+ 0.5V
Outputs, I
O
(LVPECL)
Continuous Current
50mA
Surge Current
100mA
Package Thermal Impedance,
JA
8 Lead TSSOP
101.7C/W (0 mps)
8 Lead SOIC
112.7C/W (0 lfpm)
Storage Temperature, T
STG
-65C to 150C
NOTE: Stresses beyond those listed under Absolute
Maximum Ratings may cause permanent damage to the
device. These ratings are stress specifications only. Func-
tional operation of product at these conditions or any condi-
tions beyond those listed in the
DC Characteristics
or
AC
Characteristics
is not implied. Exposure to absolute maxi-
mum rating conditions for extended periods may affect prod-
uct reliability.
T
ABLE
3B. LVCMOS/LVTTL DC C
HARACTERISTICS
,
V
CC
= V
CCO
= 3.3V0.3V, T
A
= 0C
TO
70C
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843AG-75
www.icst.com/products/hiperclocks.html
REV. A JANUARY 9, 2006
4
Integrated
Circuit
Systems, Inc.
ICS843-75
75MH
Z
, LVCMOS, LVPECL
D
UAL
O
UTPUT
O
SCILLATOR
T
ABLE
4. C
RYSTAL
C
HARACTERISTICS
(NOTE 1)
T
ABLE
5. AC C
HARACTERISTICS
,
V
CC
= V
CCO
= 3.3V0.3V, T
A
= 0C
TO
70C
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843AG-75
www.icst.com/products/hiperclocks.html
REV. A JANUARY 9, 2006
5
Integrated
Circuit
Systems, Inc.
ICS843-75
75MH
Z
, LVCMOS, LVPECL
D
UAL
O
UTPUT
O
SCILLATOR
P
ARAMETER
M
EASUREMENT
I
NFORMATION
LVPECL O
UTPUT
D
UTY
C
YCLE
/P
ULSE
W
IDTH
/P
ERIOD
LVPECL O
UTPUT
R
ISE
/F
ALL
T
IME
3.3V LVCMOS O
UTPUT
L
OAD
AC T
EST
C
IRCUIT
SCOPE
Qx
LVCMOS
1.65V 0.15V
-1.65V 0.15V
Clock
Outputs
20%
80%
80%
20%
t
R
t
F
t
PERIOD
t
PW
t
PERIOD
odc =
V
CC
2
t
PW
x 100%
Q0
GND
V
CC,
V
CCO
LVCMOS O
UTPUT
D
UTY
C
YCLE
/P
ULSE
W
IDTH
/P
ERIOD
LVCMOS O
UTPUT
R
ISE
/F
ALL
T
IME
Q1
nQ1
Clock
Outputs
20%
80%
80%
20%
t
R
t
F
V
SW I N G
t
PW
t
PERIOD
t
PW
t
PERIOD
odc =
x 100%
3.3V LVPECL O
UTPUT
L
OAD
AC T
EST
C
IRCUIT
SCOPE
Qx
nQx
LVPECL
2V
-1.3V 0.3V
V
EE
V
CC,
V
CCO
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