ASM5I2304A-2H-08-ST - Alliance Semiconductor

September 2005 ASM5P2304A

rev 1.4

Notice: The information in this document is subject to change without notice.

Alliance Semiconductor

2575 Augustine Drive •Santa Clara, CA •Tel: 408.855.4900 •Fax: 408.855.4999 •www.alsc.com

3.3V Zero Delay Buffer

Features

Zero input - output propagation delay, adjustable

by capacitive load on FBK input.

Multiple configurations - Refer “ASM5P2304A

Configurations Table”.

Input frequency range: 15MHz to 133MHz

Multiple low-skew outputs.

Output-output skew less than 200pS.

Device-device skew less than 500pS.

Two banks of four outputs.

Less than 200pS Cycle-to-Cycle jitter

(-1, -1H, -2, -2H).

Available in space saving, 8 pin 150-mil SOIC

packages.

3.3V operation.

Advanced 0.35<CMOS technology.

Industrial temperature available.

Functional Description

ASM5P2304A is a versatile, 3.3V zero-delay buffer

designed to distribute high-speed clocks in PC,

workstation, datacom, telecom and other high-performance

applications. It is available in 8 pin package. The part has

an on-chip PLL which locks to an input clock presented on

the REF pin. The PLL feedback is required to be driven to

FBK pin, and can be obtained from one of the outputs. The

input-to-output propagation delay is guaranteed to be less

than 250pS, and the output-to-output skew is guaranteed to

beless than 200pS.

The ASM5P2304A has two banks of two outputs each.

Multiple ASM5P2304A devices can accept the same input

clock and distribute it. In this case the skew between the

outputs of the two devices is guaranteed to be less than

500pS.

The ASM5P2304A is available in two different

configurations (Refer “ASM5P2304A Configurations Table).

The ASM5P2304A-1 is the base part, where the output

frequencies equal the reference if there is no counter in the

feedback path. The ASM5P2304A-1H is the high-drive

version of the -1 and the rise and fall times on this device

are much faster.

The ASM5P2304A-2 allows the user to obtain REF and

1/2X or 2X frequencies on each output bank. The exact

configuration and output frequencies depend on which

output drives the feedback pin.

Block Diagram

PLL

Extra Divider (

CLKA2

CLKA1

FBK

CLKB1

CLKB2

REF

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ASM5P2304A Configurations

Device Feedback From Bank A Frequency Bank B Frequency

ASM5P2304A-1 Bank A or Bank B Reference Reference

ASM5P2304A-1H Bank A or Bank B Reference Reference

ASM5P2304A-2 Bank A Reference Reference /2

ASM5P2304A-2 Bank B 2 X Reference Reference

ASM5P2304A-2H Bank A Reference Reference/2

ASM5P2304A-2H Bank B 2 X Reference Reference

Zero Delay and Skew Control

For applications requiring zero input-output delay, all outputs must be equally loaded.

To close the feedback loop of the ASM5P2304A, the FBK

pin can be driven from any of the four 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. This is shown in

the above graph.

For applications requiring zero input-output delay, all

outputs including the one providing feedback should be

equally loaded. If input-output delay adjustments are

required, use the above graph to calculate loading

differences between the feedback output and remaining

outputs. For zero output-output skew, be sure to load

outputs equally.

-30 -25 -20 -15 -10 -5 0510 15 20 25 30

-500

-1000

-1500

500

1000

1500

Output Load Difference: FBK Load - CLKA/CLKB Load (pF)

REF-Input to CLKA / CLKB Delay (pS)

REF Input to CLKA/CLKB Delay Vs Difference in Loading between FBK pin and CLKA/CLKB pins

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Pin Configuration

Pin Description for ASM5P2304A

Pin # Pin Name Description

1REF1Input reference frequency, 5V tolerant input

2CLKA12Buffered clock output, bank A

3CLKA22Buffered clock output, bank A

4GND Ground

5CLKB12Buffered clock output, bank B

6CLKB2 2Buffered clock output, bank B

7 VDD 3.3V supply

8FBK PLL feedback input

Notes:

1. Weak pull-down.

2. Weak pull-down on all outputs.

ASM5P

FBK

CLKB2

CLKB1

GND

CLKA1

REF

CLKA2

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Absolute Maximum Ratings

Parameter Min Max Unit

Supply Voltage to Ground Potential -0.5 +7.0 V

DC Input Voltage (Except REF) -0.5 VDD + 0.5 V

DC Input Voltage (REF) -0.5 7 V

Storage Temperature -65 +150 °C

Max. Soldering Temperature (10 sec) 260 °C

Junction Temperature 150 °C

Static Discharge Voltage

(As per JEDEC STD22- A114-B) 2000 V

Note: These are stress ratings only and functional usage is not implied. Exposure to absolute maximum ratings for prolonged periods can affect device

reliability.

Operating Conditions for ASM5P2304A Commercial Temperature Devices

Parameter Description Min Max Unit

VDD Supply Voltage 3.0 3.6 V

TAOperating Temperature (Ambient Temperature) 0 70 °C

CLLoad Capacitance, from 15MHz to 100MHz 30 pF

CLLoad Capacitance, from 100MHz to 133MHz 15 pF

CIN Input Capacitance37pF

Note:

3. Applies to both Ref Clock and FBK.

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Electrical Characteristics for ASM5P2304A Commercial Temperature Devices

Parameter Description Test Conditions Min Max Unit

VIL Input LOW Voltage 0.8 V

VIH Input HIGH Voltage 2.0 V

IIL Input LOW Current VIN = 0V 50.0 <A

IIH Input HIGH Current VIN = VDD 100.0 <A

VOL Output LOW Voltage

4IOL = 8mA (-1, -2)

IOH = 12mA (-1H, -2H) 0.4 V

VOH Output HIGH Voltage

4IOL = -8mA (-1, -2)

IOH = -12mA (-1H, -2H) 2.4 V

Unloaded outputs 100MHz REF,

Select inputs at VDD or GND 45.0

Unloaded outputs, 66MHz REF

(-1, -1H, -2, -2H) 32.0

IDD Supply Current

Unloaded outputs, 33MHz REF

(-1, -1H, -2, -2H) 18.0

Note:

4. Parameter is guaranteed by design and characterization. Not 100% tested in production.

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Switching Characteristics for ASM5P2304A Commercial Temperature Devices

Parameter Description Test Conditions Min Typ Max Unit

1/t1Output Frequency 30pF load, -1H, -2H devices 15 133 MHz

1/t1Output Frequency 15pF load, -1, -2 devices 15 133 MHz

Duty Cycle5=(t2/ t1) * 100

(-1, -2, -1H, -2H)

Measured at 1.4V, FOUT = 66.66MHz

30pF load 40.0 50.0 60.0 %

Duty Cycle5=(t2/ t1) * 100

(-1, -2,-1H, -2H)

Measured at 1.4V, FOUT = <50MHz

15 pF load 45.0 50.0 55.0 %

Output Rise Time5

(-1, -2)

Measured between 0.8V and 2.0V

30pF load 2.20 nS

Output Rise Time5

(-1, -2)

Measured between 0.8V and 2.0V

15pF load 1.50 nS

Output Rise Time5

(-1H, -2H)

Measured between 0.8V and 2.0V

30pF load 1.50 nS

Output Fall Time 5

(-1, -2)

Measured between 2.0V and 0.8V

30pF load 2.20 nS

Output Fall Time 5

(-1, -2)

Measured between 2.0V and 0.8V

15pF load 1.50 nS

Output Fall Time5

(-1H, -2H)

Measured between 2.0V and 0.8V

30pF load 1.25 nS

Output-to-output skew on same bank (-1, -2)5All outputs equally loaded 200

Output-to-output skew (-1H, -2H) All outputs equally loaded 200

Output bank A -to- output bank B skew

(-1, -2H) All outputs equally loaded 200

Output bank A to output Bank B skew (-2) All outputs equally loaded 400

t6Delay, REF Rising Edge to FBK Rising Edge5Measured at VDD /2 0 ±250 pS

t7Device-to-Device Skew5Measured at VDD/2 on the FBK pins of the device 0 500 pS

t8Output Slew Rate5Measured between 0.8V and 2.0V using

Test Circuit #2 1V/nS

Measured at 66.67MHz, loaded outputs,

15pF load 175

Measured at 66.67MHz, loaded outputs,

30pF load 200

Cycle-to-cycle jitter 5

(-1, -1H, -2H)

Measured at 25MHz, loaded outputs,

15pF load 100

Measured at 66.67MHz, loaded outputs, 30pF load 400

Cycle-to-cycle jitter 5

(-2) Measured at 66.67MHz, loaded outputs,

15pF load 375

tLOCK PLL Lock Time

5Stable power supply, valid clock presented on REF

and FBK pins 1.0 mS

Note:

5. Parameter is guaranteed by design and characterization. Not 100% tested in production.

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Operating Conditions for ASM5I2304A Industrial Temperature Devices

Parameter Description Min Max Unit

VDD Supply Voltage 3.0 3.6 V

TAOperating Temperature (Ambient Temperature) -40 85 °C

CLLoad Capacitance, from 15MHz to 100MHz 30 pF

CLLoad Capacitance, from 100MHz to 133MHz 15 pF

CIN Input Capacitance67pF

Note:

6. Applies to both Ref Clock and FBK.

Electrical Characteristics for ASM5I2304A Industrial Temperature Devices

Parameter Description Test Conditions Min Max Unit

VIL Input LOW Voltage 0.8 V

VIH Input HIGH Voltage 2.0 V

IIL Input LOW Current VIN = 0V 50.0 <A

IIH Input HIGH Current VIN = VDD 100.0 <A

VOL Output LOW Voltage

7IOL = 8mA (-1, -2)

IOH = 12mA (-1H, -2H) 0.4 V

VOH Output HIGH Voltage

7IOL = -8mA (-1, -2)

IOH = -12mA (-1H, -2H) 2.4 V

Unloaded outputs 100MHz REF,

Select inputs at VDD or GND 45.0

Unloaded outputs, 66MHz REF

(-1, -2) 35.0

IDD Supply Current

Unloaded outputs, 33MHz REF

(-1, -2) 20.0

Note:

7. Parameter is guaranteed by design and characterization. Not 100% tested in production.

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Switching Characteristics for ASM5I2304A Industrial Temperature Devices

All parameters are specified with loaded outputs

Parameter Description Test Conditions Min Typ Max Unit

1/t1Output Frequency 30pF load, -1H, -2H devices 15 133 MHz

1/t1Output Frequency 15pF load, -1 and -2 devices 15 133 MHz

Duty Cycle8=(t2/ t1) * 100

(-1, -2, -1H, -2H)

Measured at 1.4V, FOUT = <66.66MHz

30pF load 40.0 50.0 60.0 %

Duty Cycle8=(t2/ t1) * 100

(-1, -2, -1H, -2H)

Measured at 1.4V, FOUT = <50 MHz

15pF load 45.0 50.0 55.0 %

Output Rise Time8

(-1, -2)

Measured between 0.8V and 2.0V

30pF load 2.50 nS

Output Rise Time8

(-1, -2)

Measured between 0.8V and 2.0V

15pF load 1.50 nS

Output Rise Time8

(-1H, -2H)

Measured between 0.8V and 2.0V

30pF load 1.50 nS

Output Fall Time8

(-1, -2)

Measured between 2.0V and 0.8V

30pF load 2.50 nS

Output Fall Time8

(-1, -2)

Measured between 2.0V and 0.8V

15pF load 1.50 nS

Output Fall Time8

(-1H, -2H)

Measured between 2.0V and 0.8V

30pF load 1.25 nS

Output-to-output skew on same bank (-1, -2)8All outputs equally loaded 200

Output-to-output skew

(-1H, -2H) All outputs equally loaded 200

Output bank A -to- output bank B skew (-1, -2H) All outputs equally loaded 200

Output bank A -to- output bank B skew (-2) All outputs equally loaded 400

t6Delay, REF Rising Edge to FBK Rising Edge8Measured at VDD /2 0 ±250 pS

t7Device-to-Device Skew8Measured at VDD/2 on the FBK pins of the

device 0 500 pS

t8Output Slew Rate8Measured between 0.8V and 2.0V using

Test Circuit #2 1V/nS

Measured at 66.67MHz, loaded outputs,

15pF load 180

Measured at 66.67MHz, loaded outputs,

30pF load 200

Cycle-to-cycle jitter 8

(-1, -1H, -2H)

Measured at 25MHz, loaded outputs,

15pF load 100

Measured at 66.67MHz, loaded outputs,

30pF load 400

Cycle-to-cycle jitter8

(-2)

Measured at 66.67MHz, loaded outputs,

15pF load 380

tLOCK PLL Lock Time8Stable power supply, valid clock presented

on REF and FBK pins 1.0 mS

Note:

8. Parameter is guaranteed by design and characterization. Not 100% tested in production.

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Switching Waveforms

Duty Cycle Timing

All Outputs Rise/Fall Time

Output - Output Skew

Input - Output Propagation Delay

Device - Device Skew

1.4 V 1.4 V 1.4 V

2.0 V

0.8 V

3.3 V

0 V

2.0 V

0.8 V

1.4 V

DD /2

INPUT

DD /2

CLKOUT, Device 1

CLKOUT, Device 2

OUTPUT1

OUTPUT2

OUTPUT

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Test Circuits

VDD

GND

CLKOUT

CLOAD

OUTPUT

TEST CIRCUIT # 1

0.1uF

VDD

GND

10pF

OUTPUT

TEST CIRCUIT # 2

0.1uF

1KO

For parameter t8(output skew rate) on -1H devices

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Package Information

8-lead (150-mil) SOIC Package



Dimensions

Inches Millimeters

Symbol

Min Max Min Max

A1 0.004 0.010 0.10 0.25

A0.053 0.069 1.35 1.75

A2 0.049 0.059 1.25 1.50

B0.012 0.020 0.31 0.51

C0.007 0.010 0.18 0.25

D0.193 BSC 4.90 BSC

E0.154 BSC 3.91 BSC

e0.050 BSC 1.27 BSC

H0.236 BSC 6.00 BSC

L0.016 0.050 0.41 1.27

Q0° 8° 0° 8°

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Ordering Codes

Ordering Code Marking Package Type Operating Range

ASM5P2304A-1-08-SR 5P2304A-1 8-pin 150-mil SOIC-TAPE & REEL Commercial

ASM5P2304A-1-08-ST 5P2304A-1 8-pin 150-mil SOIC-TUBE Commercial

ASM5I2304A-1-08-SR 5I2304A-1 8-pin 150-mil SOIC-TAPE & REEL Industrial

ASM5I2304A-1-08-ST 5I2304A-1 8-pin 150-mil SOIC-TUBE Industrial

ASM5P2304A-1H-08-SR 5P2304A-1H 8-pin 150-mil SOIC-TAPE & REEL Commercial

ASM5P2304A-1H-08-ST 5P2304A-1H 8-pin 150-mil SOIC-TUBE Commercial

ASM5I2304A-1H-08-SR 5I2304A-1H 8-pin 150-mil SOIC-TAPE & REEL Industrial

ASM5I2304A-1H-08-ST 5I2304A-1H 8-pin 150-mil SOIC-TUBE Industrial

ASM5P2304A-2-08-SR 5P2304A-2 8-pin 150-mil SOIC-TAPE & REEL Commercial

ASM5P2304A-2-08-ST 5P2304A-2 8-pin 150-mil SOIC-TUBE Commercial

ASM5I2304A-2-08-SR 5I2304A-2 8-pin 150-mil SOIC-TAPE & REEL Industrial

ASM5I2304A-2-08-ST 5I2304A-2 8-pin 150-mil SOIC-TUBE Industrial

ASM5P2304A-2H-08-SR 5P2304A-2H 8-pin 150-mil SOIC-TAPE & REEL Commercial

ASM5P2304A-2H-08-ST 5P2304A-2H 8-pin 150-mil SOIC-TUBE Commercial

ASM5I2304A-2H-08-SR 5I2304A-2H 8-pin 150-mil SOIC-TAPE & REEL Industrial

ASM5I2304A-2H-08-ST 5I2304A-2H 8-pin 150-mil SOIC-TUBE Industrial

ASM5P2304AF-1-08-SR 5P2304AF-1 8-pin 150-mil SOIC-TAPE & REEL, Pb free Commercial

ASM5P2304AF-1-08-ST 5P2304AF-1 8-pin 150-mil SOIC-TUBE, Pb free Commercial

ASM5I2304AF-1-08-SR 5I2304AF-1 8-pin 150-mil SOIC-TAPE & REEL, Pb free Industrial

ASM5I2304AF-1-08-ST 5I2304AF-1 8-pin 150-mil SOIC-TUBE, Pb free Industrial

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Ordering Codes (Contd…)

Ordering Code Marking Package Type Operating Range

ASM5P2304AF-1H-08-SR 5P2304AF-1H 8-pin 150-mil SOIC-TAPE & REEL, Pb free Commercial

ASM5P2304AF-1H-08-ST 5P2304AF-1H 8-pin 150-mil SOIC-TUBE, Pb free Commercial

ASM5I2304AF-1H-08-SR 5I2304AF-1H 8-pin 150-mil SOIC-TAPE & REEL, Pb free Industrial

ASM5I2304AF-1H-08-ST 5I2304AF-1H 8-pin 150-mil SOIC-TUBE, Pb free Industrial

ASM5P2304AF-2-08-SR 5P2304AF-2 8-pin 150-mil SOIC-TAPE & REEL, Pb free Commercial

ASM5P2304AF-2-08-ST 5P2304AF-2 8-pin 150-mil SOIC-TUBE, Pb free, Pb free Commercial

ASM5I2304AF-2-08-SR 5I2304AF-2 8-pin 150-mil SOIC-TAPE & REEL, Pb free Industrial

ASM5I2304AF-2-08-ST 5I2304AF-2 8-pin 150-mil SOIC-TUBE, Pb free Industrial

ASM5P2304AF-2H-08-SR 5P2304AF-2H 8-pin 150-mil SOIC-TAPE & REEL, Pb free Commercial

ASM5P2304AF-2H-08-ST 5P2304AF-2H 8-pin 150-mil SOIC-TUBE, Pb free Commercial

ASM5I2304AF-2H-08-SR 5I2304AF-2H 8-pin 150-mil SOIC-TAPE & REEL, Pb free Industrial

ASM5I2304AF-2H-08-ST 5I2304AF-2H 8-pin 150-mil SOIC-TUBE, Pb free Industrial

ASM5P2304AG-1-08-SR 5P2304AG-1 8-pin 150-mil SOIC-TAPE & REEL, Green Commercial

ASM5P2304AG-1-08-ST 5P2304AG-1 8-pin 150-mil SOIC-TUBE, Green Commercial

ASM5I2304AG-1-08-SR 5I2304AG-1 8-pin 150-mil SOIC-TAPE & REEL, Green Industrial

ASM5I2304AG-1-08-ST 5I2304AG-1 8-pin 150-mil SOIC-TUBE, Green Industrial

ASM5P2304AG-1H-08-SR 5P2304AG-1H 8-pin 150-mil SOIC-TAPE & REEL, Green Commercial

ASM5P2304AG-1H-08-ST 5P2304AG-1H 8-pin 150-mil SOIC-TUBE, Green Commercial

ASM5I2304AG-1H-08-SR 5I2304AG-1H 8-pin 150-mil SOIC-TAPE & REEL, Green Industrial

ASM5I2304AG-1H-08-ST 5I2304AG-1H 8-pin 150-mil SOIC-TUBE, Green Industrial

ASM5P2304AG-2-08-SR 5P2304AG-2 8-pin 150-mil SOIC-TAPE & REEL, Green Commercial

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Notice: The information in this document is subject to change without notice.

Ordering Codes (Contd…)

Ordering Code Marking Package Type Operating Range

ASM5P2304AG-2-08-ST 5P2304AG-2 8-pin 150-mil SOIC-TUBE, Green Commercial

ASM5I2304AG-2-08-SR 5I2304AG-2 8-pin 150-mil SOIC-TAPE & REEL, Green Industrial

ASM5I2304AG-2-08-ST 5I2304AG-2 8-pin 150-mil SOIC-TUBE, Green Industrial

ASM5P2304AG-2H-08-SR 5P2304AG-2H 8-pin 150-mil SOIC-TAPE & REEL, Green Commercial

ASM5P2304AG-2H-08-ST 5P2304AG-2H 8-pin 150-mil SOIC-TUBE, Green Commercial

ASM5I2304AG-2H-08-SR 5I2304AG-2H 8-pin 150-mil SOIC-TAPE & REEL, Green Industrial

ASM5I2304AG-2H-08-ST 5I2304AG-2H 8-pin 150-mil SOIC-TUBE, Green Industrial

Device Ordering Information

ASM5P2304AF-08-SR

Licensed under US patent #5,488,627, #6,646,463 and #5,631,920.

O = SOT

U = MSOP

S = SOIC E = TQFP

T = TSSOP L = LQFP

A = SSOP U = MSOP

V = TVSOP P = PDIP

B = BGA D = QSOP

Q = QFN

X = SC

DEVICE PIN COUNT

X= Automotive I= Industrial P or n/c = Commercial

(-40C to +125C) (-40C to +85C) (0C to +70C)

1 = Reserved 6 = Power Management

2 = Non PLL based 7 = Power Management

3 = EMI Reduction 8 = Power Management

4 = DDR support products 9 = Hi Performance

5 = STD Zero Delay Buffer

0 = Reserved

ALLIANCE SEMICONDUCTOR MIXED SIGNAL PRODUCT

PART NUMBER

F = LEAD FREE AND

RoHS COMPLIANT PART

G = GREEN PACKAGE

R = Tape & reel, T = Tube or Tray

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trademarks or registered trademarks of Alliance. All other brand and product names may be the trademarks of their

respective companies. Alliance reserves the right to make changes to this document and its products at any time without

notice. Alliance assumes no responsibility for any errors that may appear in this document. The data contained herein

represents Alliance's best data and/or estimates at the time of issuance. Alliance reserves the right to change or correct this

data at any time, without notice. If the product described herein is under development, significant changes to these

specifications are possible. The information in this product data sheet is intended to be general descriptive information for

potential customers and users, and is not intended to operate as, or provide, any guarantee or warrantee to any user or

customer. Alliance does not assume any responsibility or liability arising out of the application or use of any product

described herein, and disclaims any express or implied warranties related to the sale and/or use of Alliance products

including liability or warranties related to fitness for a particular purpose, merchantability, or infringement of any intellectual

property rights, except as express agreed to in Alliance's Terms and Conditions of Sale (which are available from Alliance).

All sales of Alliance products are made exclusively according to Alliance's Terms and Conditions of Sale. The purchase of

products from Alliance does not convey a license under any patent rights, copyrights; mask works rights, trademarks, or any

other intellectual property rights of Alliance or third parties. Alliance does not authorize its products for use as critical

components in life-supporting systems where a malfunction or failure may reasonably be expected to result in significant

injury to the user, and the inclusion of Alliance products in such life-supporting systems implies that the manufacturer

assumes all risk of such use and agrees to indemnify Alliance against all claims arising from such use.

Alliance Semiconductor Corporation

2575 Augustine Drive,

Santa Clara, CA 95054

Tel# 408-855-4900

Fax: 408-855-4999

www.alsc.com

Part Number: ASM5P2304A

Document Version: 1.4

Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to Alliance Semiconductor, dated 11-11-2003