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Micrel, Inc.
5V/3.3V PROGRAMMABLE FREQUENCY SYNTHESIZER (25MHz to 400MHz)
Precision Edge(R) SY89429V Precision Edge(R)
SY89429V
FEATURES
3.3V and 5V power supply options 25MHz to 400MHz differential PECL outputs 50ps peak-to-peak output jitter Minimal frequency over-shoot Synthesized architecture Serial 3-wire interface Parallel interface for power-on Internal quartz reference oscillator driven by quartz crystal Application Note (AN-07) for ease of design-ins Available in 28-pin PLCC and SOIC packages Precision Edge(R)
DESCRIPTION
The SY89429V is a general purpose, synthesized clock source targeting applications that require both serial and parallel interfaces. Its internal VCO will operate over a range of frequencies from 400MHz to 800MHz. The differential PECL output can be configured to be the VCO frequency divided by 2, 4, 8 or 16. With the output configured to divide the VCO frequency by 2, and with a 16MHz external quartz crystal used to provide the reference frequency, the output frequency can be specified in 1MHz steps. Data sheets and support documentation can be found on Micrel's web site at: www.micrel.com.
APPLICATIONS
Workstations Advanced communications High end consumer High-performance computing RISC CPU clock Graphics pixel clock Test equipment Other high-performance processor-based applications
Precision Edge is a registered trademark of Micrel, Inc. M9999-011106 hbwhelp@micrel.com or (408) 955-1690
Rev.: J Amendment: /0
1
Issue Date: January 2006
Micrel, Inc.
Precision Edge(R) SY89429V
PACKAGE/ORDERING INFORMATION
GND (TTL) GND VCC (TTL) VCC_OUT
Ordering Information(1)
Part Number SY89429VJC
18 17
FOUT /FOUT
TEST
Package Type J28-1 J28-1 Z28-1 Z28-1 J28-1 J28-1 Z28-1 Z28-1
Operating Range Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial
Package Marking SY89429VJC SY89429VJC SY89429VZC SY89429VZC
Lead Finish Sn-Pb Sn-Pb Sn-Pb Sn-Pb
25 24 23 22 21 20 19
S_CLOCK S_DATA S_LOAD VCC_QUIET LOOP_FILTER LOOP_REF XTAL1
26 27 28 1 2 3 4 5 6 7 8 9 10 11
PLCC TOP VIEW
16 15 14 13 12
N[1] N[0] M[8] M[7] M[6] M[5] M[4]
SY89429VJCTR(2) SY89429VZC SY89429VZCTR(2) SY89429VJZ(3) SY89429VJZTR(2, 3) SY89429VZH(3) SY89429VZHTR(2, 3)
SY89429VJZ with Matte-Sn Pb-Free bar line indicator Pb-Free SY89429VJZ with Matte-Sn Pb-Free bar line indicator Pb-Free SY89429VZH with NiPdAu Pb-Free bar line indicator Pb-Free SY89429VZH with NiPdAu Pb-Free bar line indicator Pb-Free
VCC1 /P_LOAD
M[1]
M[2]
28-PinPLCC (J28-1)
XTAL2
M[0]
M[3]
M[0] M[1] M[2] M[3] M[4] M[5] M[6] M[7] M[8] N[0] N[1] GND (TTL) TEST VCC (TTL)
1 2 3 4 5 6 7 8 9 10 11 12 13 14
TOP VIEW SOIC Z28-1
28 27 26 25 24 23 22 21 20 19 18 17 16 15
/P_LOAD VCC1 XTAL2 XTAL1 LOOP_REF LOOP_FILTER VCC_QUIET S_LOAD S_DATA S_CLOCK VCC_OUT FOUT /FOUT GND
Notes: 1. Contact factory for die availability. Dice are guaranteed at TA = 25C, DC Electricals only. 2. Tape and Reel. 3. Pb-Free package is recommended for new designs.
28-PinSOIC (Z28-1)
M9999-011106 hbwhelp@micrel.com or (408) 955-1690
2
Micrel, Inc.
Precision Edge(R) SY89429V
BLOCK DIAGRAM
+3.3V or +5.0V
FREF /8
PHASE DETECTOR
PLL
VCO
10-25MHz Fundamental Crystal
PECL /N FOUT
OSC
/M
400 - 800MHz
3 WIRE INTERFACE
SERIAL PARALLEL
INTERFACE LOGIC
TEST
CONFIG INFO
DETAILED BLOCK DIAGRAM
150 2 LOOP_FILTER FREF
3300pF 3
0.47F
+3.3V or +5.0V 1 VCC_QUIET
+3.3V or +5.0V 6, 21 VCC1
LOOP_REF
/
8
PHASE DETECTOR VCO 400 - 800 MHz T110
/N (2,4,8,16)
+3.3V or +5.0V VCC_OUT 25 24 23 FOUT /FOUT
4 1025MHz Fundamental Crystal
XTAL1 OSC XTAL2
L = LATCH H = Transparent
1
0
5
10pF
9-BIT / M COUNTER
S_LOAD /P_LOAD
28 7
LATCH
FOUT O 4 N 7
LATCH
S_CLOCK O M N 6
LATCH 0 1
0 1
LOW N 5 FOUT N 4 OMN 3 FREF N 2 HIGH N 1
20
TEST
S_DATA S_CLOCK
27 26
9-BIT SR
2-BIT SR
3-BIT SR
0
8 -> 16
9 M[8:0]
17,18
2 N[1:0]
19,22
NOTE: Pin numbers reference PLCC pinout. M9999-011106 hbwhelp@micrel.com or (408) 955-1690
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Micrel, Inc.
Precision Edge(R) SY89429V
PIN DESCRIPTIONS
INPUTS XTAL1, XTAL2 These pins form an oscillator when connected to an external crystal. The crystal is series resonant. See "AN-07" for Crystal Interface Guideline. S_LOAD This TTL pin loads the configuration latches with the contents of the shift registers. The latches will be transparent when this signal is HIGH; thus, the register data must be stable on the HIGH-to-LOW transition of S_LOAD for proper operation. S_DATA This TTL pin is the input to the serial configuration shift registers. S_CLOCK This TTL pin clocks the serial configuration shift registers. On the rising edge of this signal, data from S_DATA is sampled. /P_LOAD This TTL pin loads the configuration latches with the contents of the parallel inputs. The latches will be transparent when this signal is LOW: Thus, the parallel data must be stable on the LOW-to-HIGH transition of /P_LOAD for proper operation. During power up, hold /P_LOAD low with a valid M count on M[0] - M[8] until supplies have stabilized. M[8:0] These TTL pins are used to configure the PLL loop divider. They are sampled on the LOW-to-HIGH transition of /P_LOAD. M[8] is the MSB, M[0] is the LSB. The binary count on the M pins equates to the divide-by value for the PLL. N[1:0] These TTL pins are used to configure the output divider modulus. They are sampled on the LOW-to-HIGH transition of /P_LOAD.
N[1:0] 00 01 10 11 Output Division 2 4 8 16
OUTPUTS FOUT, /FOUT These differential positive-referenced ECL signals (PECL) are the output of the synthesizer. TEST The function of this TTL output is determined by the serial configuration bits T[2:0]. POWER VCC1 This is the positive supply for the chip and is normally connected to +3.3V or +5.0V. VCC_OUT This is the positive reference for the PECL outputs, FOUT and /FOUT. It is constrained to be less than or equal to VCC1. VCC_QUIET This is the positive supply for the PLL and should be as noisefree as possible for low-jitter operation. GND These pins are the negative supply for the chip and are normally all connected to ground. OTHER LOOP_FILTER This is an analog I/O pin that provides the loop filter for the PLL. LOOP_REF This is an analog I/O pin that provides a reference voltage for the PLL.
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Micrel, Inc.
Precision Edge(R) SY89429V
WITH 16MHZ INPUT
VCO Frequency (MHz) 400 402 404 406 * * * 794 796 798 800 M Count 200 201 202 203 * * * 397 398 399 400 256 M8 0 0 0 0 * * * 1 1 1 1 128 M7 1 1 1 1 * * * 1 1 1 1 64 M6 1 1 1 1 * * * 0 0 0 0 32 M5 0 0 0 0 * * * 0 0 0 0 16 M4 0 0 0 0 * * * 0 0 0 1 8 M3 1 1 1 1 * * * 1 1 1 0 4 M2 0 0 0 0 * * * 1 1 1 0 2 M1 0 0 1 1 * * * 0 1 1 0 1 M0 0 1 0 1 * * * 1 0 1 0
FUNCTIONAL DESCRIPTION
The internal oscillator uses the external quartz crystal as the basis of its frequency reference. The output of the reference oscillator is divided by eight before being sent to the phase detector. With a 16MHz crystal, this provides a reference frequency of 2MHz. The VCO, within the PLL, operates over a range of 400- 800MHz. Its output is scaled by a divider that is configured by either the serial or parallel interfaces. The output of this loop divider is also applied to the phase detector. The phase detector and loop filter force the VCO output frequency to be M times the reference frequency by adjusting the VCO control voltage. Note that for some values of M (either too high or too low) the PLL will not achieve loop lock. External loop filter components are utilized to allow for optimal phase jitter performance. The output of the VCO is also passed through an output divider before being sent to the PECL output driver. The output divider is configured through either the serial or the parallel interfaces and can provide one of four divider ratios (2, 4, 8 or 16). This divider extends the performance of the part while providing a 50% duty cycle. The output driver is driven differentially from the output divider and is capable of driving a pair of transmission lines terminated in 50 to VCC -2 volts. The positive reference for the output driver is provided by a dedicated power pin (VCC_OUT) to reduce noise induced jitter. The configuration logic has two sections: serial and parallel. The parallel interface uses the values at the M[8:0] and N[1:0] inputs to configure the internal counters. Normally, upon system reset, the /P_LOAD input is held LOW until some time after power becomes valid. With S_LOAD held LOW, on the LOW-to-HIGH transition of /P_LOAD, the parallel inputs are captured. The parallel interface has priority over the serial interface. Internal pull-up resistors are provided on the M[8:0] and N[1:0] inputs to reduce component count. The serial interface logic is implemented with a 14-bit shift register scheme. The register shifts once per rising edge of the S_CLOCK input. The serial input S_DATA must meet set-up and hold timing as specified in the AC parameters section of this datasheet. With /P_LOAD held HIGH, the configuration latches will capture the value in the shift register on the HIGH-to-LOW edge of the S_LOAD input. See the programming section for more information. The TEST output reflects various internal node values and is controlled by the T[2:0] bits in the serial data stream. See the programming subsection of this data sheet for more information.
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Micrel, Inc.
Precision Edge(R) SY89429V
PROGRAMMING INTERFACE
Programming the device is accomplished by properly configuring the internal dividers to produce the desired frequency at the outputs. The output frequency can be represented by this formula: The TEST output provides visibility for one of several internal nodes (as determined by the T[1:0] bits in the serial configuration stream). It is not configurable through the parallel interface. Although it is possible to select the node that represents FOUT, the TTL output may not be able to toggle fast enough for some of the higher output frequencies. The T2, T1, T0 configuration latches are preset to 000 when /P_LOAD is low, so that the FOUT outputs are as jitter-free as possible. The serial configuration port can be used to select one of the alternate functions for this pin. The Test register is loaded with the first three bits, the N register with the next two and the M register with the final eight bits of the data stream on the S_DATA input. For each register, the most significant bit is loaded first (T2, N1 and M8). When T[2:0] is set to 100 the SY89429V is placed in PLL bypass mode. In this mode the S_CLOCK input is fed directly into the M and N dividers. The N divider drives the FOUT differential pair and the M counter drives the TEST output pin. In this mode the S_CLOCK input could be used for low speed board level functional test or debug. Bypassing the PLL and driving FOUT directly gives the user more control on the test clocks sent through the clock tree (See detailed Block Diagram). Because the S_CLOCK is a TTL level the input frequency is limited to 250MHz or less. This means the fastest the FOUT pin can be toggled via the S_CLOCK is 125MHz as the minimum divide ratio of the N counter is 2. Note that the M counter output on the TEST output will not be a 50% duty cycle due to the way the divider is implemented.
FOUT = (
M FXTAL 8 )x N
Where FXTAL is the crystal frequency, M is the loop divider modulus, and N is the output divider modulus. Note that it is possible to select values of M such that the PLL is unable to achieve loop lock. To avoid this, always ensure that M is selected to be 200 M 400 for a 16MHz input reference. M[8:0] and N[1:0] are normally specified once at power-on, through the parallel interface, and then possibly again through the serial interface. This approach allows the designer to bring up the application at one frequency and then change or finetune the clock, as the ability to control the serial interface becomes available. To minimize transients in the frequency domain, the output should be varied in the smallest step size possible.
T2
0 0 0 0 1 1 1 1
T1
0 0 1 1 0 0 1 1
T0
0 1 0 1 0 1 0 1 HIGH FREF
TEST
Data Out - Last Bit SR
FOUT / /FOUT FVCO / N FVCO / N FVCO / N FVCO / N FVCO / N FVCO / N S_CLOCK / N FVCO / N
M Counter Output FOUT LOW S_CLOCK / M FOUT / 4
S_CLOCK S_DATA S_LOAD M[8:0] N[1:0] /P_LOAD M,N T 2 T1 T0 N1 N0 M8 M7 M6 M5 M4 First Bit Last Bit
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Micrel, Inc.
Precision Edge(R) SY89429V
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VCC VI IOUT TLEAD Tstore TA
NOTE:
1. Permanent device damage may occur if absolute maximum ratings are exceeded. This is a stress rating only and functional operation is not implied at conditions other than those detailed in the operational sections of this data sheet. Exposure to absolute maximum ratlng conditions for extended periods may affect device reliability.
Parameter Power Supply Voltage Input Voltage Output Source Continuous Surge
Value -0.5 to +7.0 -0.5 to +7.0 50 100 +260 -65 to +150 -0 to +75
Unit V V mA C C C
Lead Temperature (soldering 20sec.) Storage Temperature Operating Temperature
100H ECL DC ELECTRICAL CHARACTERISTICS
VCC1 = VCC_QUIET = VCC_TTL = VCC_OUT = +3.3V to +5.0V 5%; TA = 0C to +75C
Symbol VOH VOL Parameter Output HIGH Voltage Output LOW Voltage Min. VCC_OUT -1.075 VCC_OUT -1.860 Max. VCC_OUT -0.830 VCC_OUT -1.570 Unit V V Condition 50 to VCC_OUT -2V 50 to VCC_OUT -2V
TTL DC ELECTRICAL CHARACTERISTICS
VCC1 = VCC_QUIET = VCC_TTL = VCC_OUT = +3.3V to +5.0V 5%; TA = 0C to +75C
TA = 0C Symbol VIH VIL IIH IIL VIK VOH VOL IOS ICC1 Parameter Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current Input Clamp Voltage Output HIGH Voltage Output LOW Voltage Output Short Circuit Current Supply Current Typical % of ICC1 VCC1 VCC_OUT VCC_QUIET VCC_TTL Min. 2.0 -- -- -- -- -- -- -- 33% 9% 14% 44% Max. -- 0.8 50 -0.6 -1.2 2.0 0.5 190 TA = +25C Min. 2.0 -- -- -- -- -- -- -- 33% 9% 14% 44% Max. -- 0.8 50 -0.6 -1.2 2.0 0.5 190 TA = +75C Min. 2.0 -- -- -- -- -- -- -- 33% 9% 14% 44% Max. -- 0.8 50 -0.6 -1.2 2.0 0.5 190 Unit V V A mA V V V mA mA mA Condition -- -- VIN = 2.7V VIN = 0.5V IIN = -12mA IOH = -2.0mA IOL = 8mA VOUT = 0V 5.0V 5% 3.3V 5%
-100 (Typ.)
-100 (Typ.)
-100 (Typ.)
0.89X of 5V Val. 0.89X of 5V Val. 0.89X of 5V Val.
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Micrel, Inc.
Precision Edge(R) SY89429V
AC ELECTRICAL CHARACTERISTICS
VCC1 = VCC_QUIET = VCC_TTL = VCC_OUT = +3.3V to +5.0V 5%; TA = 0C to +75C
TA = 0C Symbol fMAXI fMAXO tLOCK tjitter tS Parameter Maximum Input Frequency Note 1 S_CLOCK Xtal Oscillator Min. -- 10 400 25 -- -- 20 20 20 20 20 20 50 50 45 FOUT 300 Max. 10 25 800 400 10 50 -- -- -- -- -- -- -- -- 55 800 TA = +25C Min. -- 10 400 25 -- -- 20 20 20 20 20 20 50 50 45 300 Max. 10 25 800 400 10 50 -- -- -- -- -- -- -- -- 55 800 TA = +75C Min. -- 10 400 25 -- -- 20 20 20 20 20 20 50 50 45 300 Max. 10 25 800 400 10 50 -- -- -- -- -- -- -- -- 55 800 Unit MHz MHz ms ps ns Test output static Condition Fundamental Cyrstal
Maximum Output Frequency VCO (Internal) FOUT Maximum PLL Lock Time Cycle-to-Cycle Jitter (Peak-to-Peak) Setup Time S_DATA to S_CLOCK S_CLOCK to S_LOAD M, N to /P_LOAD S_DATA to S_CLOCK S_CLOCK to S_LOAD M, N to /P_LOAD S_LOAD /P_LOAD
tH
Hold Time
ns
tpw(MIN) tDC tr tf
Minimum Pulse Width FOUT Duty Cycle Output Rise/Fall 20% to 80%
ns % ps
NOTE: 1. 10MHz is the maximum frequency to load the feedback divide registers. S_CLOCK can be switched at high frequencies when used as a test clock in TEST_MODE 6.
TIMING DIAGRAM
S_DATA S_CLOCK tSET-UP S_LOAD M[8:0] N[1:0] /P_LOAD tSET-UP tHOLD tSET-UP
tHOLD
M9999-011106 hbwhelp@micrel.com or (408) 955-1690
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Micrel, Inc.
Precision Edge(R) SY89429V
28-PIN SOIC .300" WIDE (Z28-1)
M9999-011106 hbwhelp@micrel.com or (408) 955-1690
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Micrel, Inc.
Precision Edge(R) SY89429V
28-PIN PLCC (J28-1)
Rev. 03
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL
+ 1 (408) 944-0800
FAX
+ 1 (408) 474-1000
WEB
http://www.micrel.com
The information furnished by Micrel in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser's use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser's own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. (c) 2006 Micrel, Incorporated. M9999-011106 hbwhelp@micrel.com or (408) 955-1690
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