IDT ICS83908AGI

PRELIMINARY
ICS83908I-02
LOW SKEW, 1-TO-8 CRYSTAL-TO-LVCMOS
FANOUT BUFFER
GENERAL DESCRIPTION
FEATURES
The ICS83908I-02 is a low skew, high performance
ICS
1-to-8 Crystal Oscillator/3.3V LVCMOS-to-3.3V
HiPerClockS™
LVCMOS fanout buffer and a member of the
HiPerClockS™ family of High Performance Clock
Solutions from IDT. The ICS83908I-02 has selectable
single ended clock or two crystal-oscillator inputs. There is an
output enable to disable the outputs by placing them into a highimpedance state.
• Eight LVCMOS/LVTTL outputs
(19Ω typical output impedance)
Guaranteed output and part-to-part skew characteristics make
the ICS83908I-02 ideal for those applications demanding well
defined performance and repeatability.
• Part to Part Skew: TBD
• Two Crystal oscillator input pairs
One LVCMOS/LVTTL clock input
• Crystal input frequencry range: 10MHz - 40MHz
• Output frequency: 200MHz (typical) CLK0
• Output Skew: TBD
• RMS phase jitter @ 25MHz (100Hz - 1MHz):
0.22ps (typical) VDD = VDDO = 3.3V
Offset
Noise Power
100Hz ............. -111.4 dBc/Hz
1kHz ............. -139.9 dBc/Hz
10kHz ............. -157.3 dBc/Hz
100kHz ............. -157.5 dBc/Hz
• Supply Voltage Modes:
(Core/Output)
3.3V/3.3V
3.3V/2.5V
3.3V/1.8V
2.5V/2.5V
2.5V/1.8V
• -40°C to 85°C ambient operating temperature
BLOCK DIAGRAM
OE
CLK_SEL0
• Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
Pullup
Pulldown
PIN ASSIGNMENT
CLK_SEL1 Pulldown
XTAL_IN0
OSC
0 0
XTAL_OUT0
Q0
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
GND
XTAL_IN1
XTAL_OUT1
VDDO
Q7
Q6
GND
Q5
Q4
VDDO
CLK_SEL1
OE
ICS83908I-02
XTAL_IN1
OSC
8 LVCMOS Outputs
0 1
XTAL_OUT1
Q7
CLK0
VDD
XTAL_IN0
XTAL_OUT0
VDDO
Q0
Q1
GND
Q2
Q3
VDDO
CLK_SEL0
CLK0
Pulldown
24-Lead, 173-MIL TSSOP
4.4mm x 7.8mm x 0.92mm
body package
G Package
Top View
1 0
1 1
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 specifications without notice.
IDT ™ / ICS™ LVCMOS FANOUT BUFFER
1
ICS83908AGI-02 REV. B JULY 24, 2007
ICS83908I-02
LOW SKEW, 1-TO-8 CRYSTAL-TO-LVCMOS FANOUT BUFFER
PRELIMINARY
TABLE 1. PIN DESCRIPTIONS
Number
Name
1
VDD
XTAL_IN0,
XTAL_OUT0
VDDO
Q0, Q1, Q2,
Q3, Q4, Q5,
Q6, Q7
GND
CLK_SEL0,
CLK_SEL1
CLK0
2, 3
4, 10, 15, 21
5, 6, 8,
9, 16, 17,
19, 20
7, 18, 24
11,
14
12
Type
Power
Description
Power
Core supply pin.
Crystal oscillator interface. XTAL_IN0 is the input.
XTAL_OUT0 is the output.
Output supply pins.
Output
Single-ended clock outputs. LVCMOS/LVTTL interface levels.
Input
Power
Power supply ground.
Clock select inputs. See Table 3, Input Reference Function Table.
Input Pulldown
LVCMOS / LVTTL interface levels.
Input Pulldown Single-ended clock input. LVCMOS/LVTTL interface levels.
Output enable. When LOW, outputs are in HIGH impedance state.
13
OE
Input
Pullup
When HIGH, outputs are active. LVCMOS / LVTTL interface levels.
Crystal oscillator interface. XTAL_IN1 is the input.
XTAL_OUT1,
22, 23
Input
XTAL_OUT1 is the output.
XTAL_IN1
NOTE: Pullup and Pulldown refer to internal input resistors. See Table 2, Pin Characteristics, for typical values.
TABLE 2. PIN CHARACTERISTICS
Symbol
Parameter
CIN
Input Capacitance
Test Conditions
Minimum
Typical
4
Maximum
Units
pF
RPULLUP
Input Pullup Resistor
51
kΩ
RPULLDOWN
Input Pulldown Resistor
51
kΩ
VDDO = 3.465V
7
pF
CPD
Power Dissipation Capacitance
(per output)
VDDO = 2.625V
7
pF
VDDO = 2V
6
pF
VDDO = 3.3V ± 5%
19
Ω
VDDO = 2.5V ± 5%
21
Ω
VDDO = 1.8V ± 0.2V
32
Ω
ROUT
Output Impedance
TABLE 3. INPUT REFERENCE FUNCTION TABLE
Control Inputs
CLK_SEL1
CLK_SEL0
0
0
Reference
XTAL0 (default)
0
1
XTAL1
1
0
CLK0
1
1
CLK0
IDT ™ / ICS™ LVCMOS FANOUT BUFFER
2
ICS83908AGI-02 REV. B JULY 24, 2007
ICS83908I-02
LOW SKEW, 1-TO-8 CRYSTAL-TO-LVCMOS FANOUT BUFFER
PRELIMINARY
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
NOTE: Stresses beyond those listed under Absolute
Maximum Ratings may cause permanent damage to the
device. These ratings are stress specifications only. Functional operation of product at these conditions or any conditions beyond
those listed in the DC Characteristics or AC Characteristics is not
implied. Exposure to absolute maximum rating conditions for extended periods may affect product reliability.
Package Thermal Impedance, θJA 84.6°C/W (0 mps)
Storage Temperature, TSTG
-65°C to 150°C
TABLE 4A. POWER SUPPLY DC CHARACTERISTICS, VDD = VDDO = 3.3V±5%, TA = -40°C TO 85°C
Symbol
Parameter
Test Conditions
Minimum
Typical
Maximum
Units
VDD
Core Supply Voltage
3.135
3.3
3.465
V
VDDO
Output Supply Voltage
3.135
3.3
3.465
V
IDD
Power Supply Current
IDDO
Output Supply Current
No Load & XTALx selected
25
mA
No Load & CLK0 selected
0
mA
No Load & CLK0 selected
0
mA
TABLE 4B. POWER SUPPLY DC CHARACTERISTICS, VDD = 3.3V±5%, VDDO = 2.5V±5%, TA = -40°C TO 85°C
Symbol
Parameter
Minimum
Typical
Maximum
Units
VDD
Core Supply Voltage
3.135
3.3
3.465
V
VDDO
Output Supply Voltage
2.375
2. 5
2.625
I DD
Power Supply Current
IDDO
Output Supply Current
Test Conditions
V
No Load & XTALx selected
25
mA
No Load & CLK0 selected
0
mA
No Load & CLK0 selected
0
mA
TABLE 4C. POWER SUPPLY DC CHARACTERISTICS, VDD = 3.3V±5%, VDDO = 1.8V±0.2V, TA = -40°C TO 85°C
Symbol
Parameter
V DD
Core Supply Voltage
VDDO
Output Supply Voltage
IDD
Power Supply Current
IDDO
Output Supply Current
Test Conditions
Minimum
Typical
Maximum
Units
3.135
3.3
3.465
V
1.6
1.8
2.0
V
No Load & XTALx selected
25
mA
No Load & CLK0 selected
0
mA
No Load & CLK0 selected
0
mA
TABLE 4D. POWER SUPPLY DC CHARACTERISTICS, VDD = VDDO = 2.5V±5%, TA = -40°C TO 85°C
Symbol
Parameter
Minimum
Typical
Maximum
Units
V DD
Core Supply Voltage
2.375
2. 5
2.625
V
VDDO
Output Supply Voltage
2.375
2.5
2.625
V
I DD
Power Supply Current
IDDO
Output Supply Current
IDT ™ / ICS™ LVCMOS FANOUT BUFFER
Test Conditions
No Load & XTALx selected
15
mA
No Load & CLK0 selected
0
mA
No Load & CLK0 selected
0
mA
3
ICS83908AGI-02 REV. B JULY 24, 2007
ICS83908I-02
LOW SKEW, 1-TO-8 CRYSTAL-TO-LVCMOS FANOUT BUFFER
PRELIMINARY
TABLE 4E. POWER SUPPLY DC CHARACTERISTICS, VDD = 2.5V±5%, VDDO = 1.8V±0.2V, TA = -40°C TO 85°C
Symbol
Parameter
Test Conditions
VDD
Core Supply Voltage
VDDO
Output Supply Voltage
IDD
Power Supply Current
IDDO
Output Supply Current
Minimum
Typical
Maximum
Units
2.375
2.5
2.625
V
1.6
1.8
2.0
V
No Load & XTALx selected
15
mA
No Load & CLK0 selected
0
mA
No Load & CLK0 selected
0
mA
TABLE 4F. LVCMOS/LVTTL DC CHARACTERISTICS, TA = -40°C TO 85°C
Symbol
Parameter
VIH
Input High Voltage
VIL
Input Low Voltage
IIH
Input High Current
IIL
VOH
VOL
Input Low Current
CLK0,
CLK_SEL0:1
OE
CLK0,
CLK_SEL0:1
OE
Output HighVoltage
Output Low Voltage
Test Conditions
Minimum
VDD = 3.3V ± 5%
VDD = 2.5V ± 5%
VDD = 3.3V ± 5%
VDD = 2.5V ± 5%
Typical
Maximum
Units
2.2
VDD + 0.3
V
1.6
VDD + 0.3
V
-0.3
1.3
V
-0.3
0.9
V
VDD = 3.3V or 2.5V ± 5%
150
µA
VDD = 3.3V or 2.5V ± 5%
5
µA
VDD = 3.3V or 2.5V ± 5%
-5
µA
VDD = 3.3V or 2.5V ± 5%
-150
µA
VDDO = 3.3V ± 5%; NOTE 1
2.6
V
VDDO = 2.5V ± 5%; NOTE 1
1.8
V
VDDO = 1.8V ± 0.2V; NOTE 1
1.2
V
VDDO = 3.3V ± 5%; NOTE 1
0.6
V
VDDO = 2.5V ± 5%; NOTE 1
0.5
V
VDDO = 1.8V ± 0.2V; NOTE 1
0. 4
V
NOTE 1: Outputs terminated with 50Ω to VDDO/2. See Parameter Measurement section, "Load Test Circuit" diagrams.
TABLE 5. CRYSTAL CHARACTERISTICS
Parameter
Test Conditions
Minimum
Mode of Oscillation / cut
Typical Maximum
Units
Fundamental
40
MHz
Equivalent Series Resistance (ESR)
Frequency
50
Ω
Shunt Capacitance
7
pF
Drive Level
1
mW
IDT ™ / ICS™ LVCMOS FANOUT BUFFER
10
4
ICS83908AGI-02 REV. B JULY 24, 2007
ICS83908I-02
LOW SKEW, 1-TO-8 CRYSTAL-TO-LVCMOS FANOUT BUFFER
PRELIMINARY
TABLE 6A. AC CHARACTERISTICS, VDD = VDDO = 3.3V ± 5%, TA = -40°C TO 85°C
Symbol Parameter
fMAX
tpLH
t sk(o)
t sk(pp)
t R / tF
Par t-to-Par t Skew; NOTE 2, 3
RMS Phase Jitter, Random;
NOTE 2, 4
Output Rise/Fall Time
odc
Output Duty Cycle
tEN
Output Enable Time; NOTE 5
t jit(Ø)
Test Conditions
w/External
Output Frequency XTAL
w/External CLK
Propagation Delay, Low-to-High;
NOTE 1
Output Skew; NOTE 2
Minimum
Typical
Maximum
Units
40
MHz
10
200
MHz
2
ns
TBD
ps
TBD
ps
25MHz, (100Hz - 1MHz)
0.22
ps
20% to 80%
457
ps
50
%
10
ns
8
ns
Maximum
Units
40
MHz
Output Disable Time; NOTE 5
tDIS
NOTE 1: Measured from VDD/2 of the input to VDDO/2 of the output.
NOTE 2: This parameter is defined in accordance with JEDEC Standard 65.
NOTE 3: Defined as skew between outputs on different devices operating a the same supply voltages and
with equal load conditions. Using the same type of input on each device, the output is measured at VDDO/2.
NOTE 4: Phase jitter is dependent on the input source used.
NOTE 5: These parameters are guaranteed by characterization. Not tested in production.
TABLE 6B. AC CHARACTERISTICS, VDD = 3.3V ± 5%, VDDO = 2.5V ± 5%, TA = -40°C TO 85°C
Symbol Parameter
fMAX
tpLH
t sk(o)
t sk(pp)
t R / tF
Par t-to-Par t Skew; NOTE 2, 3
RMS Phase Jitter, Random;
NOTE 2, 4
Output Rise/Fall Time
odc
Output Duty Cycle
tEN
Output Enable Time; NOTE 5
t jit(Ø)
Test Conditions
w/External
Output Frequency XTAL
w/External CLK
Propagation Delay, Low-to-High;
NOTE 1
Output Skew; NOTE 2
Minimum
Typical
10
200
MHz
2.2
ns
TBD
ps
TBD
ps
25MHz, (100Hz - 1MHz)
0.21
ps
20% to 80%
463
ps
50
Output Disable Time; NOTE 5
tDIS
NOTE 1: Measured from VDD/2 of the input to VDDO/2 of the output.
NOTE 2: This parameter is defined in accordance with JEDEC Standard 65.
NOTE 3: Defined as skew between outputs on different devices operating a the same supply voltages and
with equal load conditions. Using the same type of input on each device, the output is measured at VDDO/2.
NOTE 4: Phase jitter is dependent on the input source used.
NOTE 5: These parameters are guaranteed by characterization. Not tested in production.
IDT ™ / ICS™ LVCMOS FANOUT BUFFER
5
%
10
ns
8
ns
ICS83908AGI-02 REV. B JULY 24, 2007
ICS83908I-02
LOW SKEW, 1-TO-8 CRYSTAL-TO-LVCMOS FANOUT BUFFER
PRELIMINARY
TABLE 6C. AC CHARACTERISTICS, VDD = 3.3V ± 5%, VDDO = 1.8V±0.2V, TA = -40°C TO 85°C
Symbol Parameter
fMAX
tpLH
t sk(o)
t sk(pp)
t R / tF
Par t-to-Par t Skew; NOTE 2, 3
RMS Phase Jitter, Random;
NOTE 2, 4
Output Rise/Fall Time
odc
Output Duty Cycle
tEN
Output Enable Time; NOTE 5
t jit(Ø)
Test Conditions
w/External
Output Frequency XTAL
w/External CLK
Propagation Delay, Low-to-High;
NOTE 1
Output Skew; NOTE 2
Minimum
Typical
Maximum
Units
40
MHz
10
200
MHz
2.5
ns
TBD
ps
TBD
ps
25MHz, (100Hz - 1MHz)
0.22
ps
20% to 80%
487
ps
50
%
10
ns
8
ns
Maximum
Units
40
MHz
Output Disable Time; NOTE 5
tDIS
NOTE 1: Measured from VDD/2 of the input to VDDO/2 of the output.
NOTE 2: This parameter is defined in accordance with JEDEC Standard 65.
NOTE 3: Defined as skew between outputs on different devices operating a the same supply voltages and
with equal load conditions. Using the same type of input on each device, the output is measured at VDDO/2.
NOTE 4: Phase jitter is dependent on the input source used.
NOTE 5: These parameters are guaranteed by characterization. Not tested in production.
TABLE 6D. AC CHARACTERISTICS, VDD = VDDO = 2.5V ± 5%, TA = -40°C TO 85°C
Symbol Parameter
fMAX
tpLH
t sk(o)
t sk(pp)
t R / tF
Par t-to-Par t Skew; NOTE 2, 3
RMS Phase Jitter, Random;
NOTE 2, 4
Output Rise/Fall Time
odc
Output Duty Cycle
tEN
Output Enable Time; NOTE 5
t jit(Ø)
Test Conditions
w/External
Output Frequency XTAL
w/External CLK
Propagation Delay, Low-to-High;
NOTE 1
Output Skew; NOTE 2
Minimum
Typical
10
200
MHz
2.3
ns
TBD
ps
TBD
ps
25MHz, (100Hz - 1MHz)
0.29
ps
20% to 80%
470
ps
50
Output Disable Time; NOTE 5
tDIS
NOTE 1: Measured from VDD/2 of the input to VDDO/2 of the output.
NOTE 2: This parameter is defined in accordance with JEDEC Standard 65.
NOTE 3: Defined as skew between outputs on different devices operating a the same supply voltages and
with equal load conditions. Using the same type of input on each device, the output is measured at VDDO/2.
NOTE 4: Phase jitter is dependent on the input source used.
NOTE 5: These parameters are guaranteed by characterization. Not tested in production.
IDT ™ / ICS™ LVCMOS FANOUT BUFFER
6
%
10
ns
8
ns
ICS83908AGI-02 REV. B JULY 24, 2007
ICS83908I-02
LOW SKEW, 1-TO-8 CRYSTAL-TO-LVCMOS FANOUT BUFFER
PRELIMINARY
TABLE 6E. AC CHARACTERISTICS, VDD = 2.5V ± 5%, VDDO = 1.8V±0.2V, TA = -40°C TO 85°C
Symbol Parameter
fMAX
tpLH
t sk(o)
t sk(pp)
t R / tF
Par t-to-Par t Skew; NOTE 2, 3
RMS Phase Jitter, Random;
NOTE 2, 4
Output Rise/Fall Time
odc
Output Duty Cycle
tEN
Output Enable Time; NOTE 5
t jit(Ø)
Test Conditions
w/External
Output Frequency XTAL
w/External CLK
Propagation Delay, Low-to-High;
NOTE 1
Output Skew; NOTE 2
Minimum
Typical
Maximum
Units
40
MHz
10
200
MHz
2.6
ns
TBD
ps
TBD
ps
25MHz, (100Hz - 1MHz)
0.3
ps
20% to 80%
518
ps
50
%
Output Disable Time; NOTE 5
tDIS
NOTE 1: Measured from VDD/2 of the input to VDDO/2 of the output.
NOTE 2: This parameter is defined in accordance with JEDEC Standard 65.
NOTE 3: Defined as skew between outputs on different devices operating a the same supply voltages and
with equal load conditions. Using the same type of input on each device, the output is measured at VDDO/2.
NOTE 4: Phase jitter is dependent on the input source used.
NOTE 5: These parameters are guaranteed by characterization. Not tested in production.
IDT ™ / ICS™ LVCMOS FANOUT BUFFER
7
10
ns
8
ns
ICS83908AGI-02 REV. B JULY 24, 2007
ICS83908I-02
LOW SKEW, 1-TO-8 CRYSTAL-TO-LVCMOS FANOUT BUFFER
PRELIMINARY
25MHz
RMS Phase Jitter (Random)
100Hz to 1MHz = 0.22ps (typical)
-90
-100
-110
-120
-130
-140
-150
-160
Raw Phase Noise Data
➤
NOISE POWER dBc
Hz
TYPICAL PHASE NOISE AT 25MHZ @ 3.3V
0
-10
-20
-30
-40
-50
-60
-70
-80
-170
-180
-190
100
1k
10k
100k
1M
OFFSET FREQUENCY (HZ)
IDT ™ / ICS™ LVCMOS FANOUT BUFFER
8
ICS83908AGI-02 REV. B JULY 24, 2007
ICS83908I-02
LOW SKEW, 1-TO-8 CRYSTAL-TO-LVCMOS FANOUT BUFFER
PRELIMINARY
PARAMETER MEASUREMENT INFORMATION
1.65V±5%
2.05V±5%
1.25V±5%
SCOPE
VDD,
VDDO
SCOPE
VDD
Qx
VDDO
Qx
LVCMOS
GND
LVCMOS
GND
-1.65V±5%
-1.25V±5%
3.3V CORE/3.3V OUTPUT LOAD AC TEST CIRCUIT
3.3V CORE/2.5V OUTPUT LOAD AC TEST CIRCUIT
1.25V±5%
2.4V±0.065V
0.9V±0.1V
SCOPE
VDD,
VDDO
SCOPE
VDD
Qx
VDDO
LVCMOS
Qx
GND
GND
LVCMOS
-1.25V±5%
-0.9V±0.1V
2.5V CORE/2.5V OUTPUT LOAD AC TEST CIRCUIT
3.3V CORE/1.8V OUTPUT LOAD AC TEST CIRCUIT
1.6V±0.025V
0.9V±0.1V
PART 1
Qx
SCOPE
VDD
VDDO
Qx
PART 2
Qy
GND
LVCMOS
V
DDO
2
V
DDO
2
tsk(pp)
-0.9V±0.1V
2.5V CORE/1.8V OUTPUT LOAD AC TEST CIRCUIT
IDT ™ / ICS™ LVCMOS FANOUT BUFFER
PART-TO-PART SKEW
9
ICS83908AGI-02 REV. B JULY 24, 2007
ICS83908I-02
LOW SKEW, 1-TO-8 CRYSTAL-TO-LVCMOS FANOUT BUFFER
PRELIMINARY
80%
80%
CLK0
Clock
Outputs
VDD
VDD
2
2
20%
20%
tR
VDDO
Q0:Q7
tF
2
tpLH
VDDO
2
tpHL
PROPAGATION DELAY
OUTPUT RISE/FALL TIME
V
DDO
2
Q0:Q7
t PW
t
odc =
PERIOD
t PW
x 100%
t PERIOD
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
IDT ™ / ICS™ LVCMOS FANOUT BUFFER
10
ICS83908AGI-02 REV. B JULY 24, 2007
ICS83908I-02
LOW SKEW, 1-TO-8 CRYSTAL-TO-LVCMOS FANOUT BUFFER
PRELIMINARY
APPLICATION INFORMATION
CRYSTAL INPUT INTERFACE
quencies with accuracy suitable for most applications. Additional
accuracy can be achieved by adding two small capacitors C1
and C2 as shown in Figure 1. Typical results using parallel 18pF
crystals are shown in Table 5.
A crystal can be characterized for either series or parallel mode
operation. The ICS83908I-02 has a built-in crystal oscillator
circuit. This interface can accept either a series or parallel
cr ystal without additional components and generate fre-
XTAL_OUT
C1
15p
X1
18pF Parallel Crystal
XTAL_IN
C2
15p
FIGURE 1. Crystal Input Interface
LVCMOS TO XTAL INTERFACE
impedance of the driver (Ro) plus the series resistance (Rs) equals
the transmission line impedance. In addition, matched termination
at the crystal input will attenuate the signal in half. This can be
done in one of two ways. First, R1 and R2 in parallel should equal
the transmission line impedance. For most 50Ω applications, R1
and R2 can be 100Ω. This can also be accomplished by removing
R1 and making R2 50Ω.
The XTAL_IN input can accept a single-ended LVCMOS signal
through an AC coupling capacitor. A general interface diagram is
shown in Figure 2. The XTAL_OUT pin can be left floating. The
input edge rate can be as slow as 10ns. For LVCMOS inputs, it is
recommended that the amplitude be reduced from full swing to
half swing in order to prevent signal interference with the power
rail and to reduce noise. This configuration requires that the output
VDD
VDD
R1
Ro
.1uf
Rs
Zo = 50
Zo = Ro + Rs
XTAL_IN
R2
XTAL_OUT
FIGURE 2. GENERAL DIAGRAM FOR LVCMOS DRIVER TO XTAL INPUT INTERFACE
IDT ™ / ICS™ LVCMOS FANOUT BUFFER
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ICS83908I-02
LOW SKEW, 1-TO-8 CRYSTAL-TO-LVCMOS FANOUT BUFFER
PRELIMINARY
RECOMMENDATIONS FOR UNUSED INPUT AND OUTPUT PINS
INPUTS:
OUTPUTS:
CLK INPUT
For applications not requiring the use of the test clock, it can be
left floating. Though not required, but for additional protection, a
1kΩ resistor can be tied from the CLK input to ground.
LVCMOS OUTPUTS
All unused LVCMOS output can be left floating. There should be
no trace attached.
CRYSTAL INPUTS
For applications not requiring the use of the crystal oscillator
input, both XTAL_IN and XTAL_OUT can be left floating. Though
not required, but for additional protection, a 1kΩ resister can be
tied from XTAL_IN to ground.
LVCMOS CONTROL PINS
All control pins have internal pull-ups or pull-downs; additional
resistance is not required but can be added for additional
protection. A 1kΩ resistor can be used.
IDT ™ / ICS™ LVCMOS FANOUT BUFFER
12
ICS83908AGI-02 REV. B JULY 24, 2007
ICS83908I-02
LOW SKEW, 1-TO-8 CRYSTAL-TO-LVCMOS FANOUT BUFFER
PRELIMINARY
RELIABILITY INFORMATION
TABLE 7. θJAVS. AIR FLOW TABLE
FOR
24 LEAD TSSOP
θJA by Velocity (Meters per Second)
0
Multi-Layer PCB, JEDEC Standard Test Boards
84.6°C/W
1
2.5
80.3°C/W
78.1°C/W
TRANSISTOR COUNT
The transistor count for ICS83908I-02 is: 277
IDT ™ / ICS™ LVCMOS FANOUT BUFFER
13
ICS83908AGI-02 REV. B JULY 24, 2007
ICS83908I-02
LOW SKEW, 1-TO-8 CRYSTAL-TO-LVCMOS FANOUT BUFFER
PRELIMINARY
PACKAGE OUTLINE - G SUFFIX FOR 24 LEAD TSSOP
TABLE 8. PACKAGE DIMENSIONS
SYMBOL
Millimeters
Minimum
N
A
Maximum
24
--
1.20
A1
0.05
0.15
A2
0.80
1.05
b
0.19
0.30
c
0.09
0.20
D
7.70
7.90
E
E1
6.40 BASIC
4.30
e
4.50
0.65 BASIC
L
0.45
0.75
α
0°
8°
aaa
--
0.10
REFERENCE DOCUMENT: JEDEC PUBLICATION 95, MO-153
IDT ™ / ICS™ LVCMOS FANOUT BUFFER
14
ICS83908AGI-02 REV. B JULY 24, 2007
ICS83908I-02
LOW SKEW, 1-TO-8 CRYSTAL-TO-LVCMOS FANOUT BUFFER
PRELIMINARY
TABLE 9. ORDERING INFORMATION
Part/Order Number
Marking
Package
Shipping Packaging
Temperature
ICS83908AGI-02
TBD
24 Lead TSSOP
tube
-40°C to 85°C
ICS83908AGI-02T
TBD
24 Lead TSSOP
2500 tape & reel
-40°C to 85°C
ICS83908AGI-02LF
ICS83908AI02L
24 Lead "Lead-Free" TSSOP
tube
-40°C to 85°C
ICS83908AGI-02LFT
ICS83908AI02L
24 Lead "Lead-Free" TSSOP
2500 tape & reel
-40°C to 85°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.
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 and
industrial applications. Any other applications such as those requiring 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.
IDT ™ / ICS™ LVCMOS FANOUT BUFFER
15
ICS83908AGI-02 REV. B JULY 24, 2007
ICS83908I-02
LOW SKEW, 1-TO-8 CRYSTAL-TO-LVCMOS FANOUT BUFFER
PRELIMINARY
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