ICST ICS840AM-125 125mhz, lvcmos/lvttl oscillator replacement Datasheet

ICS840-125
Integrated
Circuit
Systems, Inc.
125MHZ, LVCMOS/LVTTL
OSCILLATOR REPLACEMENT
GENERAL DESCRIPTION
FEATURES
The ICS840-125 is a Gigabit Ethernet Oscillator
Replacement and a member of the
HiPerClockS™
HiPerClocks TM family of high perfor mance
devices from ICS. The ICS840-125 uses a
25MHz crystal to synthesize 125MHz. The
ICS840-125 has excellent jitter perfor mance. The
ICS840-125 is packaged in a small 8-pin TSSOP, making
it ideal for use in systems with limited board space.
• One LVCMOS/LVTTL output, 15Ω output impedance
ICS
• Crystal oscillator interface designed for 25MHz,
18pF parallel resonant crystal
• Output frequency: 125MHz
• Random jitter: 3.7ps (typical)
• Deterministic jitter: 0.1ps (typical)
• 3.3V operating supply
• 0°C to 70°C ambient operating temperature
• Available in both standard and lead-free RoHS-compliant
packages
BLOCK DIAGRAM
OE
PIN ASSIGNMENT
Pullup
VDD
XTAL_OUT
XTAL_IN
OE
25MHz
XTAL_IN
Clock
Synthesizer
125MHz
1
2
3
4
8
7
6
5
nc
Q
VDDO
GND
ICS840-125
Q
8-Lead TSSOP
4.40mm x 3.0mm x 0.925mm package body
G Package
Top View
XTAL_OUT
ICS840-125
8-Lead SOIC
3.90mm x 4.92mm x 1.37mm body package
M Package
Top View
840AG-125
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1
REV. A FEBRUARY 3, 2006
ICS840-125
Integrated
Circuit
Systems, Inc.
125MHZ, LVCMOS/LVTTL
OSCILLATOR REPLACEMENT
TABLE 1. PIN DESCRIPTIONS
Number
Name
1
VDD
XTAL_OUT,
XTAL_IN
Power
4
OE
Input
5
GND
Power
6
VDDO
Power
7
Q
Output
8
nc
Unused
2, 3
Type
Description
Input
Pullup
Power supply pin.
Crystal oscillator interface. XTAL_IN is the input,
XTAL_OUT is the output.
Output enable pin. When HIGH, Q output is enabled. When LOW,
forces Q output to HiZ state. LVCMOS/LVTTL interface levels.
Power supply ground.
Output supply pin.
Single-ended clock output. LVCMOS/LVTTL interface levels.
15Ω output impedance.
No connect
NOTE: Pullup refers to internal input resistors. See Table 2, Pin Characteristics, for typical values.
TABLE 2. PIN CHARACTERISTICS
Symbol
Parameter
Test Conditions
Minimum
Typical
Maximum
Units
CIN
Input Capacitance
4
pF
RPULLUP
Input Pullup Resistor
51
kΩ
ROUT
Output Impedance
15
Ω
TABLE 3. CONROL FUNCTION TABLE
Control Inputs
Output
OE
Q
840AG-125
0
Hi-Z
1
Active
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2
REV. A FEBRUARY 3, 2006
ICS840-125
Integrated
Circuit
Systems, Inc.
125MHZ, LVCMOS/LVTTL
OSCILLATOR REPLACEMENT
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VDD
4.6V
Inputs, VI
-0.5V to VDD + 0.5 V
Outputs, VO
-0.5V to VDDO + 0.5V
device. These ratings are stress specifications only. Functional operation of product at these conditions or any condi-
Package Thermal Impedance, θJA
8 Lead TSSOP
101.7°C/W (0 mps)
tions beyond those listed in the DC Characteristics or AC
Characteristics is not implied. Exposure to absolute maxi-
8 Lead SOIC
112.7°C/W (0 lfpm)
Storage Temperature, TSTG
-65°C to 150°C
mum rating conditions for extended periods may affect product reliability.
NOTE: Stresses beyond those listed under Absolute
Maximum Ratings may cause permanent damage to the
TABLE 4A. POWER SUPPLY DC CHARACTERISTICS, VDD = VDDO = 3.3V±0.3V, TA = 0°C TO 70°C
Symbol
Parameter
VDD
Power Supply Voltage
VDDO
Output Supply Voltage
IDD
Power Supply Current
IDDO
Output Supply Current
Test Conditions
Minimum
Typical
Maximum
Units
3.0
3.3
3.6
V
3.0
3.3
3.6
V
96
mA
24
mA
Maximum
Units
OE = VDD (output enabled)
TABLE 4B. LVCMOS/LVTTL DC CHARACTERISTICS, VDD = VDDO = 3.3V±0.3V, TA = 0°C TO 70°C
Symbol
Parameter
Test Conditions
Minimum
Typical
VIH
Input High Voltage
2
VDD + 0.3
V
VIL
Input Low Voltage
-0.3
0.8
V
IIH
Input High Current
VDD = VIN = 3.6V
5
µA
IIL
Input Low Current
VDD = 3.6V, VIN = 0V
VOH
Output High Voltage; NOTE 1
-150
µA
2.6
V
Output Low Voltage; NOTE 1
VOL
NOTE 1: Outputs terminated with 50Ω to VDDO/2. See Parameter Measurement Information Section,
"3.3V Output Load Test Circuit".
0.5
V
Maximum
Units
TABLE 5. CRYSTAL CHARACTERISTICS
Parameter
Test Conditions
Minimum
Mode of Oscillation
Typical
Fundamental
Frequency
25
MHz
Shunt Capacitance
7
pF
Drive Level
1
mW
840AG-125
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3
REV. A FEBRUARY 3, 2006
ICS840-125
Integrated
Circuit
Systems, Inc.
125MHZ, LVCMOS/LVTTL
OSCILLATOR REPLACEMENT
TABLE 6. AC CHARACTERISTICS, VDD = VDDO = 3.3V±0.3V, TA = 0°C TO 70°C
Symbol
Parameter
fOUT
Output Frequency
Test Conditions
Minimum
Typical
Maximum
125
Units
MHz
tDJ
Deterministic Jitter ; NOTE 1
0.1
ps
tRJ
Random Jitter ; NOTE 1
RMS of Total Distribution (σ);
NOTE 1
Peak-to-Peak Jitter ; NOTE 1
3.7
ps
3.7
ps
30
ps
tRMS
tp-p
tOSC
Oscillation Star t Up Time
t R / tF
Output Rise/Fall Time
Time at minimum operating voltage
to be 0 s
20% to 80%
250
odc
Output Duty Cycle
48
Outputs terminated with 50Ω to VDDO/2. See Parameter Measurement Information Section,
"3.3V Output Load Test Circuit".
NOTE 1: Measured using Wavecrest SIA-3000.
840AG-125
www.icst.com/products/hiperclocks.html
4
10
ms
900
ps
52
%
REV. A FEBRUARY 3, 2006
ICS840-125
Integrated
Circuit
Systems, Inc.
125MHZ, LVCMOS/LVTTL
OSCILLATOR REPLACEMENT
PARAMETER MEASUREMENT INFORMATION
1.65V ± 0.15V
V
DDO
SCOPE
VDD,
VDDO
2
Q
t PW
Qx
LVCMOS
t
GND
odc =
PERIOD
t PW
x 100%
t PERIOD
-1.65V ± 0.15V
3.3V OUTPUT LOAD AC TEST CIRCUIT
80%
Clock
Outputs
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
80%
20%
20%
tR
tF
OUTPUT RISE/FALL TIME
840AG-125
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5
REV. A FEBRUARY 3, 2006
ICS840-125
Integrated
Circuit
Systems, Inc.
125MHZ, LVCMOS/LVTTL
OSCILLATOR REPLACEMENT
APPLICATION INFORMATION
CRYSTAL INPUT INTERFACE
lel resonant crystal and were chosen to minimize the ppm
error. The optimum C1 and C2 values can be slightly adjusted
for different board layouts.
The ICS840-125 has been characterized with 18pF parallel
resonant crystals. The capacitor values, C1 and C2, shown in
Figure 1 below were determined using a 25MHz, 18pF paral-
XTAL_OUT
C1
12p
X1
18pF Parallel Cry stal
XTAL_IN
C2
12p
Figure 1. CRYSTAL INPUt INTERFACE
840AG-125
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6
REV. A FEBRUARY 3, 2006
ICS840-125
Integrated
Circuit
Systems, Inc.
125MHZ, LVCMOS/LVTTL
OSCILLATOR REPLACEMENT
RELIABILITY INFORMATION
TABLE 7A. θJAVS. AIR FLOW TABLE FOR 8 LEAD TSSOP
θJA by Velocity (Meters per Second)
Multi-Layer PCB, JEDEC Standard Test Boards
0
1
2.5
101.7°C/W
90.5°C/W
89.8°C/W
TABLE 7B. θJAVS. AIR FLOW TABLE 8 LEAD SOIC
θJA by Velocity (Linear Feet per Minute)
Single-Layer PCB, JEDEC Standard Test Boards
Multi-Layer PCB, JEDEC Standard Test Boards
0
200
500
153.3°C/W
112.7°C/W
128.5°C/W
103.3°C/W
115.5°C/W
97.1°C/W
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 ICS840-125 is: 2423
840AG-125
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7
REV. A FEBRUARY 3, 2006
ICS840-125
Integrated
Circuit
Systems, Inc.
PACKAGE OUTLINE - G SUFFIX
125MHZ, LVCMOS/LVTTL
OSCILLATOR REPLACEMENT
FOR
8 LEAD TSSOP
PACKAGE OUTLINE - M SUFFIX FOR 8 LEAD SOIC
TABLE 8A. PACKAGE DIMENSIONS
SYMBOL
Millimeters
Minimum
N
A
SYMBOL
Maximum
8
Millimeters
MINIMUM
N
--
1.20
A
MAXIMUM
8
1.35
1.75
A1
0.05
0.15
A1
0.10
0.25
A2
0.80
1.05
B
0.33
0.51
b
0.19
0.30
C
0.19
0.25
c
0.09
0.20
D
4.80
5.00
D
2.90
3.10
E
3.80
4.00
4.50
H
5.80
6.20
E
E1
6.40 BASIC
4.30
e
840AG-125
TABLE 8B. PACKAGE DIMENSIONS
e
0.65 BASIC
1.27 BASIC
h
0.25
0.50
L
0.45
0.75
L
0.40
1.27
α
0°
8°
α
0°
8°
aaa
--
0.10
Reference Document: JEDEC Publication 95, MS-012
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8
REV. A FEBRUARY 3, 2006
ICS840-125
Integrated
Circuit
Systems, Inc.
125MHZ, LVCMOS/LVTTL
OSCILLATOR REPLACEMENT
TABLE 9. ORDERING INFORMATION
Part/Order Number
Marking
Package
Shipping Packaging
Temperature
ICS840AG-125
AG125
8 lead TSSOP
tube
0°C to 70°C
ICS840AG-125T
AG125
8 lead TSSOP
2500 tape & reel
0°C to 70°C
ICS840AG-125LF
TBD
8 lead "Lead-Free" TSSOP
tube
0°C to 70°C
ICS840AG-125LFT
TBD
8 lead "Lead-Free" TSSOP
2500 tape & reel
0°C to 70°C
ICS840AM-125
840AM125
8 lead SOIC
tube
0°C to 70°C
ICS840AM-125T
840AM125
8 lead SOIC
2500 tape & reel
0°C to 70°C
ICS840AM-125LF
TBD
8 lead "Lead-Free" SOIC
tube
0°C to 70°C
ICS840AM-125LFT
TBD
8 lead "Lead-Free" SOIC
2500 tape & reel
0°C to 70°C
NOTE: Par ts that are ordered with an "LF" suffix to the par t number are the Pb-Free configuration and are RoHS compliant.
The aforementioned trademark, HiPerClockS is a trademark of Integrated Circuit Systems, Inc. or its subsidiaries in the United States and/or other countries.
While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems, Incorporated (ICS) 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. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are
not recommended without additional processing by ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize or warrant any ICS
product for use in life support devices or critical medical instruments.
840AG-125
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9
REV. A FEBRUARY 3, 2006
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