IDT2308A Integrated Device Technology, Inc., IDT2308A Datasheet

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IDT2308A

Manufacturer Part Number
IDT2308A
Description
3.3V Zero Delay Clock Multiplier
Manufacturer
Integrated Device Technology, Inc.
Datasheet

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FEATURES:
• Phase-Lock Loop Clock Distribution for Applications ranging
• Distributes one clock input to two banks of four outputs
• Separate output enable for each output bank
• External feedback (FBK) pin is used to synchronize the outputs
• Output Skew <200 ps
• Low jitter <200 ps cycle-to-cycle
• 1x, 2x, 4x output options (see table):
• No external RC network required
• Operates at 3.3V V
• Available in SOIC and TSSOP packages
FUNCTIONAL BLOCK DIAGRAM
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
IDT2308A
3.3V ZERO DELAY CLOCK MULTIPLIER
c
from 10MHz to 133MHz operating frequency
to the clock input
– IDT2308A-1 1x
– IDT2308A-2 1x, 2x
– IDT2308A-3 2x, 4x
– IDT2308A-4 2x
– IDT2308A-1H and -2H for High Drive
2004
Integrated Device Technology, Inc.
DD
REF
FBK
S2
S1
16
1
8
9
(-3, -4)
(-5)
2
2
3.3V ZERO DELAY CLOCK
MULTIPLIER
PLL
Control
Logic
1
(-2, -3)
DESCRIPTION:
designed to address high-speed clock distribution and multiplication applica-
tions. The zero delay is achieved by aligning the phase between the incoming
clock and the output clock, operable within the range of 10 to 133MHz.
select addresses. By proper selection of input addresses, both banks can be
put in tri-state mode. In test mode, the PLL is turned off, and the input clock
directly drives the outputs for system testing purposes. In the absence of an
input clock, the IDT2308A enters power down. In this mode, the device will
draw less than 12µA for Commercial Temperature range and less than 25µA
for Industrial temperature range, and the outputs are tri-stated.
scaling and multiplication of the Input REF Clock. (See available options
table.)
to control the delay between the input clock and the outputs.
tion.
The IDT2308A is a high-speed phase-lock loop (PLL) clock multiplier. It is
The IDT2308A has two banks of four outputs each that are controlled via two
The PLL is closed externally to provide more flexibility by allowing the user
The IDT2308A is characterized for both Industrial and Commercial opera-
The IDT2308A is available in six unique configurations for both pre-
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
2
10
11
7
6
2
3
14
15
CLKA1
CLKA2
CLKA3
CLKA4
CLKB1
CLKB2
CLKB3
CLKB4
IDT2308A
JULY 2004
DSC 6587/2

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IDT2308A Summary of contents

Page 1

... The zero delay is achieved by aligning the phase between the incoming clock and the output clock, operable within the range 133MHz. The IDT2308A has two banks of four outputs each that are controlled via two select addresses. By proper selection of input addresses, both banks can be put in tri-state mode ...

Page 2

... IDT2308A 3.3V ZERO DELAY CLOCK MULTIPLIER PIN CONFIGURATION 1 REF 2 CLKA1 3 CLKA2 GND 6 CLKB1 7 CLKB2 8 S2 SOIC/ TSSOP TOP VIEW PIN DESCRIPTION Pin Number Functional Description REF 1 Input Reference Clock, 5 Volt Tolerant Input (1) CLKA1 2 Clock Output for Bank A (2) CLKA2 3 Clock Output for Bank A ...

Page 3

... ZERO DELAY AND SKEW CONTROL To close the feedback loop of the IDT2308A, the FBK pin can be driven from any of the eight available output pins. The output driving the FBK pin will be driving a total load of 7pF plus any additional load that it drives. The relative loading of this output (with respect to the remaining outputs) can adjust the input-output delay ...

Page 4

... IDT2308A 3.3V ZERO DELAY CLOCK MULTIPLIER OPERATING CONDITIONS- COMMERCIAL Symbol Parameter V Supply Voltage DD T Operating Temperature (Ambient Temperature Load Capacitance below 100MHz L Load Capacitance from 100MHz to 133MHz C Input Capacitance (1) IN NOTE: 1. Applies to both REF and FBK. DC ELECTRICAL CHARACTERISTICS - COMMERCIAL Symbol Parameter ...

Page 5

... IDT2308A 3.3V ZERO DELAY CLOCK MULTIPLIER SWITCHING CHARACTERISTICS - COMMERCIAL Symbol Parameter t Output Frequency 1 t Output Frequency 1 t Output Frequency 1 ÷ t Duty Cycle = (-1, -2, -3, -4, -1H, -2H) ÷ t Duty Cycle = (-1, -2, -3, -4, -1H, -2H) t Rise Time (-1, -2, -3, - Rise Time (-1, -2, -3, -4) ...

Page 6

... IDT2308A 3.3V ZERO DELAY CLOCK MULTIPLIER OPERATING CONDITIONS- INDUSTRIAL Symbol Parameter V Supply Voltage DD T Operating Temperature (Ambient Temperature Load Capacitance below 100MHz L Load Capacitance from 100MHz to 133MHz C Input Capacitance (1) IN NOTE: 1. Applies to both REF and FBK. DC ELECTRICAL CHARACTERISTICS - INDUSTRIAL Symbol Parameter ...

Page 7

... IDT2308A 3.3V ZERO DELAY CLOCK MULTIPLIER SWITCHING CHARACTERISTICS - INDUSTRIAL Symbol Parameter t Output Frequency 1 t Output Frequency 1 t Output Frequency 1 ÷ t Duty Cycle = (-1, -2, -3, -4, -1H, -2H) ÷ t Duty Cycle = (-1, -2, -3, -4, -1H, -2H) t Rise Time (-1, -2, -3, - Rise Time (-1, -2, -3, -4) ...

Page 8

... IDT2308A 3.3V ZERO DELAY CLOCK MULTIPLIER SWITCHING WAVEFORMS Output COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES t1 t2 1.4V 1.4V Duty Cycle Timing 0.8V 0. All Outputs Rise/Fall Time 1.4V Output 1.4V Output t5 Output to Output Skew V 2 DD/ Input V 2 FBK DD/ t6 Input to Output Propagation Delay FBK Device 1 FBK, ...

Page 9

... IDT2308A 3.3V ZERO DELAY CLOCK MULTIPLIER TEST CIRCUITS TEST CIRCUIT CLK OUT 0.1µF OUTPUTS V DD 0.1µF GND GND Test Circuit for all Parameters Except t8 COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES 0.1µF C LOAD 0.1µF GND Test Circuit for t8, Output Slew Rate On -1H and -2H Devices ...

Page 10

... Device Type Package Process Ordering Code IDT2308A-1DC IDT2308A-1DCI IDT2308A-1HDC IDT2308A-1HDCI IDT2308A-1HPG IDT2308A-1HPGI IDT2308A-2DC IDT2308A-2DCI IDT2308A-2HDC IDT2308A-2HDCI IDT2308A-3DC IDT2308A-3DCI IDT2308A-4DC IDT2308A-4DCI NOTE: Contact factory for availability of green packages. CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES Blank Commercial (0 ...

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