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June 2005 rev 0.3 2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer
Features
Output frequency range: 8.3MHz to 125MHz Input frequency range: 4.2MHz to 62.5MHz 2.5V or 3.3V operation Split 2.5V/3.3V outputs 14 Clock outputs: Drive up to 28 clock lines 1 Feedback clock output 2 LVCMOS reference clock inputs 150 pS max output-output skew PLL bypass mode `SpreadTrak' Output enable/disable Pin compatible with MPC9774 and CY29774AI. Industrial temperature range: -40C to +85C 52Pin 1.0mm TQFP package RoHS Compliance
ASM5I9774A
The ASM5I9774A features two reference clock inputs and provides 14 outputs partitioned in 3 banks of 5, 5, and 4 outputs. Bank A and Bank B divide the VCO output by 4 or 8 while Bank C divides by 8 or 12 per SEL(A:C) settings, see Functional Table. These dividers allow output to input ratios of 6:1, 4:1, 3:1, 2:1, 3:2, 4:3, 1:1, and 2:3. Each LVCMOS compatible output can drive 50 series or parallel terminated transmission lines. For series terminated transmission lines, each output can drive one or two traces giving the device an effective fanout of 1:28. The PLL is ensured stable given that the VCO is configured to run between 200 MHz to 500 MHz. This allows a wide range of output frequencies from 8.3 MHz to 125 MHz. For normal operation, the external feedback input, FB_IN, is connected to the feedback output, FB_OUT. The internal VCO is running at multiples of the input reference clock set by the feedback divider, see Frequency Table.
Functional Description
The ASM5I9774A is a low-voltage high-performance 125MHz PLL-based zero delay buffer designed for highspeed clock distribution applications.
When PLL_EN is LOW, PLL is bypassed and the reference clock directly feeds the output dividers. This mode is fully static and the minimum input clock frequency specification does not apply.
Block Diagram
VCO_SEL PLL_EN TCLK_SEL TCLK0 TCLK1 FB_IN SELA +2/+4 CLK STOP +2
PLL 200500MHZ
+2/+4 +4
CLK STOP
QA0 QA1 QA2 QA3 QA4 QB0 QB1 QB2 QB3 QB4
SELB
+4/+6 SELC CLK_STP#
CLK STOP
QC0 QC1 QC2 QC3 FB_OUT
+4/+6/+8/+12 FB_SEL(1.0) MR#/OE
Alliance Semiconductor 2575, Augustine Drive * Santa Clara, CA * Tel: 408.855.4900 * Fax: 408.855.4999 * www.alsc.com
Notice: The information in this document is subject to change without notice.
June 2005 rev 0.3
Pin Configuration
ASM5I9774A
VCO_SEL
VDDQC
VDDQC
QC1
QC2
QC3
VDDQB
VSS
VSS
VSS MR#/OE CLK_STP# SELB SELC PLL_EN SELA TCLK_SEL TCLK0 TCLK1 NC VDD AVDD
1 2 3 4 5 6 7 8 9 10 11 12 13
52 51 50 49 48 47 46 45 44 43 42 41 40
QC0
VSS
QB0 39 38 37 36 35 34 33 32 31 30 29 28 27
NC
VSS QB1 VDDQB QB2 VSS QB3 VDDQB QB4 FB_IN VSS FB_OUT VDDFB NC
ASM5I9774A
14 15 16 17 18 19 20 21 22 23 24 25 26
QA4
QA3
QA2
QA1
FB_SEL0
FB_SEL1
AVSS
VSS
VDDQA
VDDQA
VSS
QA0
2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer
Notice: The information in this document is subject to change without notice.
VDDQA
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Pin Description1 Pin
9 10 16, 18, 21, 23, 25 32, 34, 36, 38, 40 44, 46, 48, 50 29 31 2 3 6 8 52 7, 4, 5 20, 14 17, 22, 26 33, 37, 41 45, 49 28 13 12 15 1, 19, 24, 30, 35, 39, 43, 47, 51 11, 27, 42
ASM5I9774A
Name
TCLK0 TCLK1 QA(4:0) QB(4:0) QC(3:0) FB_OUT FB_IN MR#/OE CLK_STP# PLL_EN TCLK_SEL VCO_SEL SEL(A:C) FB_SEL(1,0) VDDQA VDDQB VDDQC VDDFB AVDD VDD AVSS VSS NC
I/O
I, PD I, PU O O O O I, PU I, PU I, PU I, PU I, PD I, PD I, PD I, PD Supply Supply Supply Supply Supply Supply Supply Supply
Type
LVCMOS LVCMOS LVCMOS LVCMOS LVCMOS LVCMOS LVCMOS LVCMOS LVCMOS LVCMOS LVCMOS LVCMOS LVCMOS LVCMOS VDD VDD VDD VDD VDD VDD Ground Ground
Description
LVCMOS/LVTTL reference clock input LVCMOS/LVTTL reference clock input Clock output bank A Clock output bank B Clock output bank C Feedback clock output. Connect to FB_IN for normal operation. Feedback clock input. Connect to FB_OUT for normal operation. This input should be at the same voltage rail as input reference clock. See Table 1. Output enable/disable input. See Table 2. Clock stop enable/disable input. See Table 2. PLL enable/disable input. See Table 2. Reference select input. See Table 2. VCO divider select input. See Table 2. Frequency select input, Bank (A:C). See Table 3. Feedback dividers select input. See Table 4. 2.5V or 3.3V Power supply for bank A output clocks2,3 2.5V or 3.3V Power supply for bank B output clocks2,3 2.5V or 3.3V Power supply for bank C output clocks2,3 2.5V or 3.3V Power supply for feedback output clock2,3 2.5V or 3.3V Power supply for PLL2,3 2.5V or 3.3V Power supply for core and inputs2,3 Analog Ground Common Ground No Connection
Note: 1.PU = Internal pull up, PD = Internal pull down. 2.A 0.1-F bypass capacitor should be placed as close as possible to each positive power pin (<0.2"). If these bypass capacitors are not close to the pins their high frequency filtering characteristics will be cancelled by the lead inductance of the traces. 3.AVDD and VDD pins must be connected to a power supply level that is at least equal or higher than that of VDDQA, VDDQB, VDDQC, and VDDFB power supply pins
2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer
Notice: The information in this document is subject to change without notice.
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`SpreadTrak'
Many systems being designed now utilize a technology called Spread Spectrum Frequency Timing Generation. ASM59774A is designed so as not to filter off the Spread Spectrum feature of the Reference Input, assuming it exists.
ASM5I9774A
When a zero delay buffer is not designed to pass the Spread Spectrum feature through, the result is a significant amount of tracking skew which may cause problems in the systems requiring synchronization.
Table 1. Frequency Table Feedback Output Divider
/8 /12 /16 /24 /32 /48
VCO
Input Clock * 8 Input Clock * 12 Input Clock * 16 Input Clock * 24 Input Clock * 32 Input Clock * 48
Input Frequency Range (AVDD = 3.3V)
25 MHz to 62.5 MHz 16.6 MHz to 41.6 MHz 12.5 MHz to 31.25 MHz 8.3 MHz to 20.8 MHz 6.25 MHz to 15.625 MHz 4.2 MHz to 10.4 MHz
Input Frequency Range (AVDD = 2.5V)
25 MHz to 50 MHz 16.6 MHz to 33.3 MHz 12.5 MHz to 25 MHz 8.3 MHz to 16.6 MHz 6.25 MHz to 12.5 MHz 4.2 MHz to 8.3 MHz
Table 2. Function Table (configuration controls) Control
TCLK_SEL VCO_SEL PLL_EN
Default
0 0 1 TCLK0
0
TCLK1 VCO/2 (high input frequency range) Bypass mode, PLL disabled. The input clock connects to the output dividers Outputs disabled (three-state) and reset of the device. During reset/output disable the PLL feedback loop is open and the VCO running at its minimum frequency. The device is reset by the internal power-on reset (POR) circuitry during power-up. QA, QB, and QC outputs disabled in LOW state. FB_OUT is not affected by CLK_STP#.
1
VCO/4 (low input frequency range) PLL enabled. The VCO output connects to the output dividers
MR#/OE
1
Outputs enabled
CLK_STP#
1
Outputs enabled
Table 3. Function Table (Bank A, B and C) VCO_SEL
0 0 1 1
SELA
0 1 0 1
QA(4:0)
/4 /8 /8 /16
SELB
0 1 0 1
QB(4:0)
/4 /8 /8 /16
SELC
0 1 0 1
QC(3:0)
/8 /12 /16 /24
2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer
Notice: The information in this document is subject to change without notice.
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Table 4. Function Table (FB_OUT) VCO_SEL
0 0 0 0 1 1 1 1
ASM5I9774A
FB_SEL1
0 0 1 1 0 0 1 1
FB_SEL0
0 1 0 1 0 1 0 1
FB_OUT
/8 /16 /12 /24 /16 /32 /24 /48
Absolute Maximum Conditions Parameter
VDD VDD VIN VOUT VTT LU RPS TS TA TJ OJC OJA ESDH FIT
Description
DC Supply Voltage DC Operating Voltage DC Input Voltage DC Output Voltage Output termination Voltage Latch Up Immunity Power Supply Ripple Temperature, Storage Temperature, Operating Ambient Temperature, Junction Dissipation, Junction to Case Dissipation, Junction to Ambient ESD Protection (Human Body Model) Failure in Time
Condition
Functional Relative to VSS Relative to VSS Functional Ripple Frequency < 100 kHz Non Functional Functional Functional Functional Functional Manufacturing test
Min
-0.3 2.375 -0.3 -0.3 200 -65 -40 2000 10
Max
5.5 3.465 VDD+ 0.3 VDD+ 0.3 VDD /2 150 +150 +85 150 23 55 -
Unit
V V V V V mA mVp-p C C C C/W C/W Volts ppm
2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer
Notice: The information in this document is subject to change without notice.
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DC Electrical Specifications (VDD = 2.5V 5%, TA = -40C to +85C) Parameter
VIL VIH VOL VOH IIL IIH IDDA IDDQ IDD CIN ZOUT
ASM5I9774A
Description
Input Voltage, Low Input Voltage, High Output Voltage, Low1 Output Voltage, High1 Input Current, Low2 Input Current, High2 PLL Supply Current Quiescent Supply Current Dynamic Supply Current Input Pin Capacitance Output Impedance
Condition
LVCMOS LVCMOS IOL= 15mA IOH= -15mA VIL= VSS VIL= VDD AVDD only All VDD pins except AVDD Outputs loaded @ 100 MHz
Min
1.7 1.8 14
Typ
5 135 4 18
Max
0.7 VDD+0.3 0.6 -100 100 10 8 22
Unit
V V V V A A mA mA mA pF
Note: 1. Driving one 50parallel-terminated transmission line to a termination voltage of VTT. Alternatively, each output terminated transmission lines 2. Inputs have pull-up or pull-down resistors that affect the input current.
drives up to two 50 series-
DC Electrical Specifications (VDD= 3.3V 5%, TA= -40C to +85C) Parameter
VIL VIH VOL VOH IIL IIH IDDA IDDQ IDD CIN ZOUT
Description
Input Voltage, Low Input Voltage, High Output Voltage, Low1 Output Voltage, High1 Input Current, Low2 Input Current, High2 PLL Supply Current Quiescent Supply Current Dynamic Supply Current Input Pin Capacitance Output Impedance
Condition
LVCMOS LVCMOS IOL= 24 mA IOL= 12 mA IOH= -24 mA VIL= VSS VIL= VDD AVDD only All VDD pins except AVDD Outputs loaded @ 100 MHz
Min
2.0 2.4 12
Typ
5 225 4 15
Max
0.8 VDD + 0.3 0.55 0.30 -100 100 10 8 18
Unit
V V V V A A mA mA mA pF
Note: 1. Driving one 50parallel-terminated transmission line to a termination voltage of VTT. Alternatively, each output terminated transmission lines 2. Inputs have pull-up or pull-down resistors that affect the input current.
drives up to two 50 series-
2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer
Notice: The information in this document is subject to change without notice.
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June 2005 rev 0.3
AC Electrical Specifications (VDD = 2.5V 5%, TA = -40C to +85C)1 Parameter
fVCO
ASM5I9774A
Description
VCO Frequency
Condition
/8 Feedback /12 Feedback /16 Feedback
Min
200 25 16.6 12.5 8.3 6.3 4.2 0 25
Typ
0.5 -1.0 -
Max
400 50 33.3 25 16.6 12.5 8.3 200 75 1.0 100 50 33.3 25 16.6 55 0.75 100 150 150
Unit
MHz
fin
Input Frequency
/24 Feedback /32 Feedback /48 Feedback Bypass mode (PLL_EN = 0)
MHz
frefDC t r, t f
Input Duty Cycle TCLK Input Rise/FallTime 0.7V to 1.7V /4 Output /8 Output
% nS
- 50 25 16.6 12.5 8.3 45
fMAX
Maximum Output Frequency
/12 Output /16 Output /24 Output
MHz
DC t r, t f t() tsk(O) tsk(B) tPLZ, HZ tPZL, ZH BW tJIT(CC) tJIT(PER) tJIT() tLOCK
Output Duty Cycle Output Rise/Fall times Propagation Delay (static phase offset) Output-to-Output Skew Bank-to-Bank Skew Output Disable Time Output Enable Time PLL Closed Loop Bandwidth (-3 dB) Cycle-to-Cycle Jitter Period Jitter I/O Phase Jitter Maximum PLL Lock Time Same frequency Multiple frequencies 0.7V to 1.8V TCLK to FB_IN, does not include jitter Skew within Bank Banks at same frequency Banks at different frequency
% nS pS pS pS
0.1 -100 -
200 10 10 100 250 100 125 1 nS nS MHz pS pS pS mS
Note: 1. AC characteristics apply for parallel output termination of 50 to VTT. Outputs are at same supply voltage unless otherwise stated. Parameters are guaranteed by characterization and are not 100% tested.
2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer
Notice: The information in this document is subject to change without notice.
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June 2005 rev 0.3
AC Electrical Specifications (VDD = 3.3V 5%, TA = -40C to +85C)1 Parameter
fVCO fin
ASM5I9774A
Description
VCO Frequency Input Frequency
Condition
/8 Feedback /12 Feedback /16 Feedback /24 Feedback /32 Feedback /48 Feedback Bypass mode (PLL_EN = 0)
Min
200 25 16.6 12.5 8.3 6.25 4.2 0 25
Typ
-
Max
500 62.5 41.6 31.25 20.8 15.625 10.4 200 75 1.0 125 62.5 41.6 31.25 20.8 55 1.0
Unit
MHz
MHz
frefDC t r, t f fMAX
Input Duty Cycle TCLK Input Rise/FallTime Maximum Output Frequency 0.8V to 2.0V /4 Output /8 Output /12 Output /16 Output /24 Output
% nS
50 25 16.6 12.5 8.3 45 0.1 -100 -
MHz
DC tr, tf t() tsk(O) tsk(B)
Output Duty Cycle Output Rise/Fall times Propagation Delay (static phase offset) Output-to-Output Skew Bank-to-Bank Skew 0.8V to 2.4V TCLK to FB_IN, same VDD, does not include jitter Skew within Bank Banks at same voltage, same frequency Banks at same voltage, different frequency Banks at different voltage
% nS pS pS
0.5 - 1.0 -
100 150 150 225 250 10 10 150 300 100 150 1
pS
tPLZ, HZ tPZL, ZH BW tJIT(CC)
Output Disable Time Output Enable Time PLL Closed Loop Bandwidth (-3dB) Cycle-to-Cycle Jitter
nS nS MHz pS pS pS mS
Same frequency Multiple frequencies
-
tJIT(PER) tJIT() tLOCK
Period Jitter I/O Phase Jitter Maximum PLL Lock Time I/O at same VDD
Note: 1. AC characteristics apply for parallel output termination of 50 to VTT. Outputs are at same supply voltage unless otherwise stated. Parameters are guaranteed by characterization and are not 100% tested.
2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer
Notice: The information in this document is subject to change without notice.
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June 2005 rev 0.3
Zo = 50 ohm Pulse Generator Z = 50 ohm RT = 50 ohm
ASM5I9774A
VTT
VTT
Figure 1. LVCMOS_CLK AC Test Reference for VDD = 3.3V/2.5V
VDD LVCMOS_CLK VDD/2 GND VDD VDD/2
t()
GND
Figure 2. LVCMOS Propagation Delay t(), Static Phase Offset
VDD VDD/2
tP T0
GND
DC = tP / T0 x 100% Figure 3. Output Duty Cycle (DC)
VDD VDD/2 GND VDD VDD/2
tSK(0)
GND
Figure 4. Output-to-Output Skew, tsk(O)
2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer
Notice: The information in this document is subject to change without notice.
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June 2005 rev 0.3
Package Information 52-lead TQFP Package
ASM5I9774A
SECTION A-A
Dimensions Symbol
A A1 A2 D D1 E E1 L L1 T T1 b b1 R0 a e
Inches Min Max
.... 0.0020 0.0374 0.4646 0.3898 0.4646 0.3898 0.0177 0.0035 0.0038 0.0102 0.0106 0.0031 0 0.0472 0.0059 0.0413 0.4803 0.3976 0.4803 0.3976 0.0295 0.0079 0.0062 0.0150 0.0130 0.0079 7
Millimeters Min Max
... 0.05 0.95 11.8 9.9 11.8 9.9 0.45 0.09 0.097 0.26 0.27 0.08 0 1.2 0.15 1.05 12.2 10.1 12.2 10.1 0.75 0.2 0.157 0.38 0.33 0.2 7
0.03937 REF
1.00 REF
0.0256 BASE
0.65 BASE
2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer
Notice: The information in this document is subject to change without notice.
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June 2005 rev 0.3
Ordering Information Part Number
ASM5I9774A-52-ET ASM5I9774A-52-ER ASM5I9774AG-52-ET ASM5I9774AG-52-ER
ASM5I9774A
Marking
ASM5I9774A ASM5I9774A ASM5I9774AG ASM5I9774AG
Package Type
52-pin TQFP, Tray 52-pin TQFP - Tape and Reel 52-pin TQFP, Tray, Green 52-pin TQFP - Tape and Reel, Green
Operating Range
Industrial Industrial Industrial Industrial
Device Ordering Information
ASM5I9774AG-52-ET
R = Tape & reel, T = Tube or Tray O = SOT S = SOIC T = TSSOP A = SSOP V = TVSOP B = BGA Q = QFN DEVICE PIN COUNT F = LEAD FREE AND RoHS COMPLIANT PART G = GREEN PACKAGE PART NUMBER X= Automotive I= Industrial P or n/c = Commercial (-40C to +125C) (-40C to +85C) (0C to +70C) 1 = Reserved 2 = Non PLL based 3 = EMI Reduction 4 = DDR support products 5 = STD Zero Delay Buffer 6 = Power Management 7 = Power Management 8 = Power Management 9 = Hi Performance 0 = Reserved U = MSOP E = TQFP L = LQFP U = MSOP P = PDIP D = QSOP X = SC-70
ALLIANCE SEMICONDUCTOR MIXED SIGNAL PRODUCT
Licensed under US patent #5,488,627, #6,646,463 and #5,631,920.
2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer
Notice: The information in this document is subject to change without notice.
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June 2005 rev 0.3
ASM5I9774A
Alliance Semiconductor Corporation 2575, Augustine Drive, Santa Clara, CA 95054 Tel# 408-855-4900 Fax: 408-855-4999 www.alsc.com
Copyright (c) Alliance Semiconductor All Rights Reserved Part Number: ASM5I9774A Document Version: 0.3
Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to Alliance Semiconductor, dated 11-11-2003
(c) Copyright 2003 Alliance Semiconductor Corporation. All rights reserved. Our three-point logo, our name and Intelliwatt are 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.
2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer
Notice: The information in this document is subject to change without notice.
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