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Micrel, Inc.
/2/4, /4/5/6 CLOCK
GENERATION CHIP
Precision Edge(R) SY100S839V Precision Edge(R)
SY100S839V
FEATURES
s s s s s s s 3.3V and 5V power supply option 50ps output-to-output skew 50% duty cycle outputs Synchronous enable/disable Master Reset for synchronization Internal 75K input pull-down resistors Available in 20-pin SOIC package Precision Edge(R)
DESCRIPTION
The SY100S839V is a low skew /2/4, /4/5/6 clock generation chip 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 device can be driven by either a differential or single-ended ECL/LVECL or, if positive power supplies are used, PECL/LVPECL input signal. In addition, by using the VBB output, a sinusoidal source can be AC-coupled into the device. If a singleended 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 S839V 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. Upon start-up, the internal flip-flops will attain a random state; the master reset (MR) input must be asserted to ensure synchronization. For systems which only use one S839V, the MR pin need not be exercised as the internal divider designs ensures synchronization between the /2/4, and the /4/5/6 outputs of a single device.
Precision Edge is a registered trademark of Micrel, Inc. M9999-032206 hbwhelp@micrel.com or (408) 955-1690
Rev.: B Amendment: /0
1
Issue Date: March 2006
Micrel, Inc.
Precision Edge(R) SY100S839V
PACKAGE/ORDERING INFORMATION
Ordering Information
VCC /EN DIVSELb0 CLK /CLK VBB MR VCC DIVSELb1 1 2 3 4 5 6 7 8 9 20 VCC 19 Q0 18 /Q0 17 Q1 16 /Q1 15 Q2 14 /Q2 13 Q3 12 /Q3 11 VEE
Part Number SY100S839VZC SY100S839VZCTR(1) SY100S839VZG(2) SY100S839VZGTR(1, 2)
Package Type Z20-1 Z20-1 Z20-1 Z20-1
Operating Range Commercial Commercial Industrial Industrial
Package Marking SY100S839VZC SY100S839VZC SY100S839VZG with Pb-Free bar-line indicator SY100S839VZG with Pb-Free bar-line indicator
Lead Finish Sn-Pb Sn-Pb Pb-Free NiPdAu Pb-Free NiPdAu
DIVSELa 10
Notes: 1. Tape and Reel. 2. Pb-Free package is recommended for new designs.
20-Pin SOIC (Z20-1)
TRUTH TABLE
CLK Z ZZ X /EN L H X MR L L H Function Divide Hold Q0-3 Reset Q0-3
PIN NAMES
Pin CLK /EN MR VBB Q0, Q1 Q2, Q3 Q0, Q1 OUTPUTS Divide by 2 Divide by 4 Function Differential Clock Inputs Synchronous Enable Master Reset Reference Output Differential /2/4 Outputs Differential /4/5/6 Outputs Frequency Select Input
Note: Z = LOW-to-HIGH transition ZZ = HIGH-to-LOW transition
DIVSELa 0 1 DIVSELb1 0 0 1 1
DIVSEL
DIVSELb0 0 1 0 1
Q2, Q3 OUTPUTS Divide by 4 Divide by 6 Divide by 5 Divide by 5
M9999-032206 hbwhelp@micrel.com or (408) 955-1690
2
Micrel, Inc.
Precision Edge(R) SY100S839V
DC ELECTRICAL CHARACTERISTICS(1)
VEE = VEE (min) to VEE (max); VCC = GND
TA = -40C Symbol IEE VBB IIH VOH VOL VOHA VOLA VIH VIL IIL Parameter Power Supply Current Output Reference Voltage Input High Current Output HIGH Voltage(2) Output LOW Voltage(2) Output HIGH Voltage(3) Output LOW Voltage(3) Input HIGH Voltage Input LOW Voltage Input LOW Current(4) Min.
-- -1.38 --
TA = 0C Min.
-- -1.38 -- -1025
TA = +25C Max.
95 -1.26 150 -880
TA = +85C Min.
-- -1.38 -- -1025
Typ.
50 -- --
Max.
95 -1.26 150 -880
Typ.
50 -- -- -955
Min.
-- -1.38 -- -1025
Typ.
50 -- -- -955
Max.
95 -1.26 150 -880
Typ.
54 -- -- -955
Max.
95 -1.26 150 -880
Unit mA V A mV mV mV mV mV mV A
-1085 -1005
-1830 -1695 -1555 -1810 -1705 -1620 -1810 -1705 -1620 -1810 -1705 -1620 -1095 -- -1165 -1810 0.5 -- -- -- -- -- -- -1555 -880 -1035 -- -1165 -- -- -- -- -- -- -1610 -880 -1035 -- -1165 -- -- -- -- -- -- -1610 -880 -1035 -- -1165 -- -- -- -- -- -- -1610 -880 -1475 --
-1475 -1810 -- 0.5
-1475 -1810 -- 0.5
-1475 -1810 -- 0.5
Note: 1. Parametric values specified at: -3.0V to -3.8V or -4.2V to -5.5V. 2. VIN = VIH(Max) or VIL(Min): Loading with 50 to -2.0V. 3. VIN = VIH(Min) or VIL(Max): Loading with 50 to -2.0V. 4. VIN = VIL(Min).
M9999-032206 hbwhelp@micrel.com or (408) 955-1690
3
Micrel, Inc.
Precision Edge(R) SY100S839V
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 Part-to-Part tS tH VPP VCMR Set-up Time Hold Time Q0 -- Q3 (Diff.) /EN /CLK DIVSEL CLK /CLK /EN CLK DIVSEL CLK Range(4), (5) TA = 0C TA = +25C TA = +85C Unit MHz ps 725 675 600 -- -- 250 400 100 150 250 -1.6 -- CLK MR Q 500 700 280 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 925 975 900 50 200 -- -- -- -- -- -0.4 100 -- -- 550 725 675 600 -- -- 250 400 100 150 250 -1.7 -- 500 700 280 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 925 975 900 50 200 -- -- -- -- -- -0.4 100 -- -- 550 725 675 610 -- -- 250 400 100 150 250 -1.7 -- 500 700 280 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 925 975 910 50 200 -- -- -- -- -- -0.4 100 -- -- 550 725 675 630 -- -- 250 400 100 150 250 -1.7 -- 500 700 280 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 925 975 930 50 200 -- -- -- -- -- -0.4 100 -- -- 550 ps ps mV V ps ps ps ps Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. 1000 -- -- 1000 -- -- 1000 -- -- 1000 -- --
tskew
Minimum Input Swing(3) Common Mode
tRR
tPW tr
Reset Recovery Time Minimum Pulse Width Output Rise/Fall Times (20% --80%)
tf
Notes: 1. Parametric values specified at: -3.0V to -3.8V or -4.2V to -5.5V. 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. 5. Duty Cycle: (Min. 48%; Max. 52%) } over temp.
M9999-032206 hbwhelp@micrel.com or (408) 955-1690
4
Micrel, Inc.
Precision Edge(R) SY100S839V
LOGIC DIAGRAM
DIVSELa (/ 2/4) CLK CLK R
Q0 Q0 Q1 Q1
EN
(/4/5/6)
Q2 Q2 Q3
VBB
R
MR DIVSELb0 DIVSELb1
Q3
TIMING DIAGRAMS
CLK
Q (/ 2)
Q (/ 4)
Q (/ 5)
Q (/ 6)
M9999-032206 hbwhelp@micrel.com or (408) 955-1690
5
Micrel, Inc.
Precision Edge(R) SY100S839V
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. M9999-032206 hbwhelp@micrel.com or (408) 955-1690
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