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Micrel, Inc.
5V/3.3V /2, /4/6 CLOCK GENERATION CHIP
Precision Edge(R) SY10EL38/L Precision Edge(R) SY100EL38/L
SY10EL38/L SY100EL38/L
FEATURES
s s s s s 3.3V and 5V power supply options 50ps output-to-output skew Synchronous enable/disable Master Reset for synchronization Internal 75K input pull-down resistors Precision Edge(R)
DESCRIPTION
The SY10/100EL38/L are low skew /2, /4/6 clock generation chips designed explicitly for low skew clock generation applications. The internal dividers are synchronous to each other, therefore, the common output edges are all precisely aligned. The devices can be driven by either a differential or single-ended ECL or, if positive power supplies are used, PECL input signal. In addition, by using the VBB output, a sinusoidal source can be ACcoupled into the device. If a single-ended input is to be used, the VBB output should be connected to the CLK input and bypassed to ground via a 0.01F capacitor. The VBB output is designed to act as the switching reference for the input of the EL38/L under single-ended input conditions. As a result, this pin can only source/ sink up to 0.5mA of current. The common enable (EN) is synchronous so that the internal dividers will only be enabled/disabled when the internal clock is already in the LOW state. This avoids any chance of generating a runt clock pulse on the internal clock when the device is enabled/disabled as can happen with an asynchronous control. An internal runt pulse could lead to losing synchronization between the internal divider stages. The internal enable flip-flop is clocked on the falling edge of the input clock, therefore, all associated specification limits are referenced to the negative edge of the clock input. The Phase_Out output will go HIGH for one clock cycle whenever the /2 and the /4/6 outputs are both transitioning from a LOW to a HIGH. This output allows for clock synchronization within the system. Upon start-up, the internal flip-flops will attain a random state; the master reset (MR) input allows for the synchronization of the internal dividers, as well as for multiple EL38/Ls in a system.
s Available in 20-pin SOIC package
Precision Edge is a registered trademark of Micrel, Inc. M9999-031006 hbwhelp@micrel.com or (408) 955-1690
Rev.: G Amendment: /0
1
Issue Date: March 2006
Micrel, Inc.
Precision Edge(R) SY10EL38/L SY100EL38/L
PACKAGE/ORDERING INFORMATION
Ordering Information(1)
VCC /EN DIVSEL CLK /CLK VBB MR VCC PHASED_OUT /PHASED_OUT 1 2 3 4 5 6 7 8 9 10 20 VCC 19 Q0 18 /Q0 17 Q1 16 /Q1 15 Q2 14 /Q2 13 Q3 12 /Q3 11 VEE
Part Number SY10EL38LZC SY10EL38LZCTR(2) SY100EL38LZC SY100EL38LZCTR(2) SY10EL38LZI SY10EL38LZITR(2) SY100EL38LZI SY100EL38LZITR(2) SY10EL38LZG(3)
Package Type Z20-1 Z20-1 Z20-1 Z20-1 Z20-1 Z20-1 Z20-1 Z20-1 Z20-1 Z20-1 Z20-1 Z20-1
Operating Range Commercial Commercial Commercial Commercial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial
Package Marking SY10EL38LZC SY10EL38LZC SY100EL38LZC SY100EL38LZC SY10EL38LZI SY10EL38LZI SY100EL38LZI SY100EL38LZI
Lead Finish Sn-Pb Sn-Pb Sn-Pb Sn-Pb Sn-Pb Sn-Pb Sn-Pb Sn-Pb
SY10EL38LZG with Pb-Free Pb-Free bar-line indicator NiPdAu SY10EL38LZG with Pb-Free Pb-Free bar-line indicator NiPdAu SY100EL38LZG with Pb-Free Pb-Free bar-line indicator NiPdAu SY100EL38LZG with Pb-Free Pb-Free bar-line indicator NiPdAu
20-Pin SOIC (Z20-1)
SY10EL38LZGTR(2, 3) SY100EL38LZG(3) SY100EL38LZGTR(2, 3)
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.
M9999-031006 hbwhelp@micrel.com or (408) 955-1690
2
Micrel, Inc.
Precision Edge(R) SY10EL38/L SY100EL38/L
PIN NAMES
Pin CLK EN MR VBB Q0, Q1 Q2, Q3 DIVSEL Function Differential Clock Inputs Synchronous Enable Master Reset Reference Output Differential /2 Outputs Differential /4/6 Outputs Frequency Select Input
TRUTH TABLE
CLK Z ZZ X EN L H X MR L L H Function Divide Hold Q0-3 Reset Q0-3
NOTE: Z = LOW-to-HIGH transition ZZ = HIGH-to-LOW transition
DIVSEL 0 1
Q2, Q3 OUTPUTS Divide by 4 Divide by 6
DC ELECTRICAL CHARACTERISTICS(1)
VEE = VEE (Min.) to VEE (Max.); VCC = GND
TA = -40C Symbol IEE Parameter Power Supply Current 10EL 100EL Output Reference Voltage 10EL 100EL Input High Current Min. 35 35 -1.43 -1.38 -- Typ. 50 50 -- -- -- Max. 65 65 -1.30 -1.26 150 Min. 35 35 -1.38 -1.38 -- TA = 0C Typ. -- -- -- -- -- Max. 65 65 -1.27 -1.26 150 TA = +25C Min. 35 35 -1.35 -1.38 -- Typ. -- -- -- -- -- Max. 65 65 -1.25 -1.26 150 Min. 35 35 -1.31 -1.38 -- TA = +85C Typ. -- -- -- -- -- Max. 65 75 V -1.19 -1.26 150 A Unit mA
VBB
IIH
NOTE: 1. Parametric values specified at:
5 volt Power Supply Range 3 volt Power Supply Range
100EL38 Series: 10EL38 Series 10/100EL38L Series:
-4.2V to -5.5V. -4.75V to -5.5V. -3.0V to -3.8V.
M9999-031006 hbwhelp@micrel.com or (408) 955-1690
3
Micrel, Inc.
Precision Edge(R) SY10EL38/L SY100EL38/L
AC ELECTRICAL CHARACTERISTICS(1)
VEE = VEE (Min.) to VEE (Max.); VCC = GND
TA = -40C Symbol fMAX tPD Parameter Maximum Toggle Frequency Propagation Delay to Output CLK Output (Diff.) CLK Output (S.E.) MR Output Within-Device Skew(2) Q0 -- Q3 All Part-to-Part tS tH VPP VCMR tRR tPW tr tf Set-up Time Hold Time Q0 -- Q3 (Diff.) All EN CLK DIVSEL CLK CLK EN CLK DIVSEL CLK Range(4) Min. 1000 950 900 600 -- -- -- -- 300 300 400 400 250 -- CLK MR Q 800 700 280 -- -- -- -- -- -- -- -- 150 -- 150 200 -- -- -- -- -- -- -- 1150 1200 900 50 75 200 240 -- -- -- -- -- -0.4 100 -- -- 550 TA = 0C 1000 950 900 600 -- -- -- -- -- -- 400 400 250 -1.4 -- 800 700 280 -- -- -- -- -- -- -- -- 150 -- 150 200 -- -- -- -- -- -- -- 1150 1200 900 50 75 200 240 -- -- -- -- -- -0.4 100 -- -- 550 TA = +25C 1000 970 920 600 -- -- -- -- -- -- 400 400 250 -1.4 -- 800 700 280 -- -- -- -- -- -- -- -- 150 -- 150 200 -- -- -- -- -- -- -- TA = +85C Min. 1000 Typ. Max. Unit -- -- -- -- -- -- -- -- 150 -- 150 200 -- -- -- -- -- -- -- 1250 1300 900 50 75 200 240 -- -- -- -- -- -0.4 100 -- -- 550 ps ps mV V ps ps ps ps MHz ps 1170 1050 1220 1000 900 600 50 75 200 240 -- -- -- -- -- -0.4 100 -- -- 550 -- -- -- -- -- -- 400 400 250 -1.4 -- 800 700 280 Typ. Max. Min. Typ. Max. Min. Typ. Max.
tskew
Minimum Input Swing(3) Common Mode Reset Recovery Time Minimum Pulse Width Output Rise/Fall Times (20% --80%)
CLK -1.3
NOTES: 1. Parametric values specified at:
5 volt Power Supply Range
3 volt Power Supply Range 2. Skew is measured between outputs under identical transitions. 3. Minimum input swing for which AC parameters are guaranteed. The device will function reliably with differential inputs down to 100mV. 4. The CMR range is referenced to the most positive side of the differential input signal. Normal operation is obtained if the HIGH level falls within the specified range and the peak-to-peak voltage lies between VPP min. and 1V. The lower end of the CMR range varies 1:1 with VEE. The numbers in the spec table assume a nominal VEE = -3.3V. Note for PECL operation, the VCMR (min) will be fixed at 3.3V - IVCMR (min)I.
100EL38 Series: 10EL38 Series 10/100EL38L Series:
-4.2V to -5.5V. -4.75V to -5.5V. -3.0V to -3.8V.
M9999-031006 hbwhelp@micrel.com or (408) 955-1690
4
Micrel, Inc.
Precision Edge(R) SY10EL38/L SY100EL38/L
LOGIC DIAGRAM
(/ 2) CLK CLK R
Q0 Q0 Q1 Q1
EN R R MR DIVSEL Phase Out Logic R
(/ 4/6)
Q2 Q2 Q3 Q3
Phased_Out Phased_Out
TIMING DIAGRAMS
CLK
Q (/ 2)
Q (/ 4)
Q (/ 6)
Phase_Out(/ 4)
Phase_Out(/ 6)
M9999-031006 hbwhelp@micrel.com or (408) 955-1690
5
Micrel, Inc.
Precision Edge(R) SY10EL38/L SY100EL38/L
20-PIN SOIC .300" WIDE (Z20-1)
Rev. 03
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131
TEL
USA
+ 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. M9999-031006 hbwhelp@micrel.com or (408) 955-1690
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