2308-2DCGI Datasheet 2308-1DCGI8, 2308-1HPGG8, 2308-1DCG8 | P1-P3

COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES

IDT2308

3.3V ZERO DELAY CLOCK MULTIPLIER

OCTOBER 2016

2016 Integrated Device Technology, Inc. DSC 5173/12c

COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES

The IDT logo is a registered trademark of Integrated Device Technology, Inc.

FEATURES:

• Phase-Lock Loop Clock Distribution for Applications ranging

from 10MHz to 133MHz operating frequency

• 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

to the clock input

• Output Skew <200 ps

• Low jitter <200 ps cycle-to-cycle

• 1x, 2x, 4x output options (see table):

– IDT2308-1 1x

– IDT2308-2 1x, 2x

– IDT2308-3 2x, 4x

– IDT2308-4 2x

– IDT2308-1H, -2H, and -5H for High Drive

• No external RC network required

• Operates at 3.3V VDD

• Available in SOIC and TSSOP packages

FUNCTIONAL BLOCK DIAGRAM

DESCRIPTION:

The IDT2308 is a high-speed phase-lock loop (PLL) clock multiplier. It is

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.

The IDT2308 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. 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 IDT2308 enters power down, and the outputs are tri-stated. In

this mode, the device will draw less than 25μA.

The IDT2308 is available in six unique configurations for both pre-

scaling and multiplication of the Input REF Clock. (See available options

table.)

The PLL is closed externally to provide more flexibility by allowing the user

to control the delay between the input clock and the outputs.

The IDT2308 is characterized for both Industrial and Commercial operation.

IDT2308

3.3V ZERO DELAY

CLOCK MULTIPLIER

PLL

CLKA1

CLKA2

CLKA3

CLKA4

CLKB1

CLKB2

CLKB3

CLKB4

FBK

Control

Logic

REF

(-2, -3)

(-3, -4)

(-5)

COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES

IDT2308

3.3V ZERO DELAY CLOCK MULTIPLIER

PIN CONFIGURATION

SOIC/ TSSOP

TOP VIEW

REF

CLKA1

161

CLKA2

GND

CLKB1

FBK

CLKA4

GND

VDD

CLKB2

CLKB3

CLKB4

CLKA3

Symbol Rating Max. Unit

VDD Supply Voltage Range –0.5 to +4.6 V

(2)

Input Voltage Range (REF) –0.5 to +5.5 V

I Input Voltage Range –0.5 to V

(except REF) VDD+0.5

IIK (VI < 0) Input Clamp Current –50 mA

OK Terminal Voltage with Respect ±50 mA

(VO < 0 or VO > VDD) to GND (inputs VIH 2.5, VIL 2.5)

O Continuous Output Current ±50 mA

(VO = 0 to VDD)

VDD or GND Continuous Current ±100 mA

A = 55°C Maximum Power Dissipation 0.7 W

(in still air)

(3)

TSTG Storage Temperature Range –65 to +150 ° C

Operating Commercial Temperature 0 to +70 °C

Temperature Range

Operating Industrial Temperature -40 to +85 °C

Temperature Range

NOTES:

1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may

cause permanent damage to the device. This is a stress rating only and functional

operation of the device at these or any other conditions above those indicated in the

operational sections of this specification is not implied. Exposure to absolute maximum

rating conditions for extended periods may affect reliability.

2. The input and output negative-voltage ratings may be exceeded if the input and output

clamp-current ratings are observed.

3. The maximum package power dissipation is calculated using a junction temperature

of 150°C and a board trace length of 750 mils.

APPLICATIONS:

• SDRAM

• Telecom

• Datacom

• PC Motherboards/Workstations

• Critical Path Delay Designs

Pin Number Functional Description

REF 1 Input Reference Clock, 5 Volt Tolerant Input

CLKA1

(1)

2 Clock Output for Bank A

CLKA2

(1)

3 Clock Output for Bank A

VDD 4 3.3V Supply

GND 5 Ground

CLKB1

(1)

6 Clock Output for Bank B

CLKB2

(1)

7 Clock Output for Bank B

(2)

8 Select Input, Bit 2

(2)

9 Select Input, Bit 1

CLKB3

(1)

10 Clock Output for Bank B

CLKB4

(1)

11 Clock Output for Bank B

GND 12 Ground

VDD 13 3.3V Supply

CLKA3

(1)

14 Clock Output for Bank A

CLKA4

(1)

15 Clock Output for Bank A

FBK 16 PLL Feedback Input

NOTES:

1. Weak pull down on all outputs.

2. Weak pull ups on these inputs.

PIN DESCRIPTION

ABSOLUTE MAXIMUM RATINGS

(1)

COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES

IDT2308

3.3V ZERO DELAY CLOCK MULTIPLIER

Device Feedback From Bank A Frequency Bank B Frequency

IDT2308-1 Bank A or Bank B Reference Reference

IDT2308-1H Bank A or Bank B Reference Reference

IDT2308-2 Bank A Reference Reference/2

IDT2308-2 Bank B 2 x Reference Reference

IDT2308-2H Bank A Reference Reference/2

IDT2308-2H Bank B 2 x Reference Reference

IDT2308-3 Bank A 2 x Reference Reference or Reference

(1)

IDT2308-3 Bank B 4 x Reference 2 x Reference

IDT2308-4 Bank A or Bank B 2 x Reference 2 x Reference

IDT2308-5H Bank A or Bank B Reference/2 Reference/2

NOTE:

1. Output phase is indeterminant (0° or 180° from input clock).

AVAILABLE OPTIONS FOR IDT2308

S2 S1 CLK A CLK B Output Source PLL Shut Down

L L Tri-State Tri-State PLL Y

L H Driven Tri-State PLL N

H L Driven Driven REF Y

H H Driven Driven PLL N

FUNCTION TABLE

(1)

SELECT INPUT DECODING

NOTE:

1. H = HIGH Voltage Level

L = LOW Voltage Level

P1-P3 P4-P6 P7-P9 P10-P12 P13-P13

2308-2DCGI

Mfr. #:

Buy 2308-2DCGI

Manufacturer:

IDT

Description:

Clock Generators & Support Products 3.3V PLL ZERO DELAY CLOCK MULTIPLIER

Lifecycle:

New from this manufacturer.

Delivery:

DHL FedEx Ups TNT EMS

Payment:

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2308-2DCGI

2308-2DCGI

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