MICREL SY100S838LZI

(÷1, ÷2/3) OR (÷2, ÷4/6)
CLOCK GENERATION CHIP
Micrel, Inc.
Precision Edge®
Precision SY100S838
Edge®
SY100S838L
SY100S838
SY100S838L
FEATURES
■
■
■
■
■
■
3.3V and 5V power supply options
50ps output-to-output skew
Synchronous enable/disable
Master Reset for synchronization
Internal 75KΩ input pull-down resistors
Available in 20-pin SOIC package
Precision Edge®
DESCRIPTION
The SY100S838/L is a low skew (÷1, ÷2/3) or (÷2, ÷4/
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 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 0.01µF capacitor.
The V BB output is designed to act as the switching
reference for the input of the SY100S838/L under singleended input conditions. As a result, this pin can only
source/sink up to 0.5mA of current.
The Function Select (FSEL) input is used to determine
what clock generation chip function is. When FSEL input
is LOW, SY100S838/L functions as a divide by 2 and by
4/6 clock generation chip. However, if FSEL input is HIGH,
it functions as a divide by 1 and by 2/3 clock chip.
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 allows for the
synchronization of the internal dividers, as well as for
multiple SY100S838/Ls in a system.
TRUTH TABLE
CLK
EN
MR
Function
Z
L
L
Divide
ZZ
H
L
Hold Q0–3
X
X
H
Reset Q0–3
NOTES:
Z = LOW-to-HIGH transition
ZZ = HIGH-to-LOW transition
FSEL
DIVSEL
Q0, Q1 OUTPUTS
Q2, Q3 OUTPUTS
L
L
Divide by 2
Divide by 4
L
H
Divide by 2
Divide by 6
H
L
Divide by 1
Divide by 2
H
H
Divide by 1
Divide by 3
PIN NAMES
Pin
Function
CLK
Differential Clock Inputs
FSEL
Function Select Input
EN
Synchronous Enable
MR
Master Reset
VBB
Reference Output
Q0, Q1
Differential ÷1 or ÷2 Outputs
Q2, Q3
Differential ÷2/3 or ÷4/6 Outputs
DIVSEL
Frequency Select Input
Precision Edge is a registered trademark of Micrel, Inc.
M9999-113006
[email protected] or (408) 955-1690
Rev.: G
1
Amendment: /0
Issue Date: November 2006
Precision Edge®
SY100S838
SY100S838L
Micrel, Inc.
PACKAGE/ORDERING INFORMATION
Ordering Information
Sn-Pb
SY100S838LZC
Z20-1
Commercial
SY100S838LZC
Sn-Pb
SY100S838LZCTR(1)
Z20-1
Commercial
SY100S838LZC
Sn-Pb
SY100S838ZI
Z20-1
Industrial
SY100S838ZI
Sn-Pb
SY100S838ZITR(1)
Z20-1
Industrial
SY100S838ZI
Sn-Pb
SY100S838LZI
Z20-1
Industrial
SY100S838LZI
Sn-Pb
SY100S838LZITR(1)
Z20-1
Industrial
SY100S838LZI
Sn-Pb
13
SY100S838ZG(2)
Z20-1
Industrial
SY100S838ZG with
NiPdAu
Pb-Free bar-line indicator Pb-Free
12
Q3
SY100S838ZGTR(1, 2)
Z20-1
Industrial
11
VEE
SY100S838ZG with
NiPdAu
Pb-Free bar-line indicator Pb-Free
SY100S838LZG(2)
Z20-1
Industrial
SY100S838LZG with
NiPdAu
Pb-Free bar-line indicator Pb-Free
SY100S838LZGTR(1, 2)
Z20-1
Industrial
SY100S838LZG with
NiPdAu
Pb-Free bar-line indicator Pb-Free
14
20-Pin SOIC (Z20-1)
Q2
10
SY100S838ZC
15
F SEL
Commercial
Q2
9
Z20-1
16
NC
Sn-Pb
Q1
8
SY100S838ZC
17
VCC
Commercial
Q1
7
MR
Z20-1
SY100S838ZCTR(1)
18
6
VBB
TOP VIEW
SOIC
Z20-1
5
SY100S838ZC
Q0
4
CLK
Lead
Finish
19
3
DIVSEL CLK
Package
Marking
Q0
2
EN
Operating
Range
Q3
20
VCC
1
VCC
Package
Type
Part Number
Notes:
1. Tape and Reel.
2. Pb-Free package is recommended for new designs.
M9999-113006
[email protected] or (408) 955-1690
2
Precision Edge®
SY100S838
SY100S838L
Micrel, Inc.
BLOCK DIAGRAM
CLK
÷1
CLK
Q0
1
0
Q0
÷2
Q1
Q1
EN
÷ 2 or
÷3
R
Q2
1
0
÷ 4 or
÷6
MR
Q2
FSEL
Q3
DIVSEL
Q3
DC ELECTRICAL CHARACTERISTICS(1)
VEE = VEE (Min.) to VEE (Max.); VCC = GND
TA = –40°C
Symbol
Parameter
Power Supply Current
VBB
Output Reference Voltage
IIH
Input High Current
M9999-113006
[email protected] or (408) 955-1690
TA = +25°C
TA = +85°C
Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.
IEE
Note:
1. Parametric values specified at:
TA = 0°C
35
50
-1.38
—
—
—
5 volt Power Supply Range
3 volt Power Supply Range
65
35
-1.26 -1.38
150
—
50
—
—
100S838 Series:
100S838L Series
3
65
35
-1.26 -1.38
150
—
-4.2V to -5.5V.
-3.0V to -3.8V.
50
—
—
65
35
-1.26 -1.38
150
—
Unit
54
75
mA
—
-1.26
V
—
150
µA
Precision Edge®
SY100S838
SY100S838L
Micrel, Inc.
AC ELECTRICAL CHARACTERISTICS(1)
VEE = VEE (Min.) to VEE (Max.); VCC = GND
TA = –40°C
Symbol
Parameter
TA = 0°C
TA = +25°C
TA = +85°C
Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.
Unit
MHz
fMAX
Maximum Toggle Frequency
1000
—
—
1000
—
—
1000
—
tPLH
tPHL
Propagation Delay to Output
CLK ➝ Output (Diff.)
CLK ➝ Output (S.E.)
MR ➝ Q
950
900
600
—
—
—
1150
1200
900
950
900
600
—
—
—
1150
1200
900
970
920
600
—
—
—
tskew
Within-Device Skew(2) Q0 — Q3
—
—
50
—
—
50
—
—
50
—
—
50
Part-to-Part
Q0 — Q3 (Diff.)
—
—
200
—
—
200
—
—
200
—
—
200
tS
Set-up Time
EN ➝ CLK
DIVSEL ➝ CLK
300
300
150
—
—
—
300
300
150
—
—
—
300
300
150
—
—
—
300
300
150
—
—
—
ps
tH
Hold Time
CLK ➝ EN
CLK ➝ DIVSEL
400
400
150
200
—
—
400
400
150
200
—
—
400
400
150
200
—
—
400
400
150
200
—
—
ps
VPP
Minimum Input Swing(3)
CLK
250
—
—
250
—
—
250
—
—
250
—
—
mV
CLK
(4)
—
-0.55
(4)
—
-0.55
(4)
—
-0.55
(4)
—
-0.55
V
—
—
100
—
—
100
—
—
100
—
—
100
ps
CLK
MR
800
700
—
—
—
—
800
700
—
—
—
—
800
700
—
—
—
—
800
700
—
—
—
—
ps
Q
280
—
550
280
—
550
280
—
550
280
—
550
ps
Range(4)
VCMR
Common Mode
tRR
Reset Recovery Time
tPW
Minimum Pulse Width
tr
tf
Output Rise/Fall Times
(20% —80%)
—
1000
—
—
1170 1050
1220 1000
900 600
—
—
—
1250
1300
900
ps
Notes:
1. Parametric values specified at:
ps
5 volt Power Supply Range 100S838 Series:
-4.2V to -5.5V.
3 volt Power Supply Range 100S838L Series -3.0V to -3.8V.
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 1.0V. The lower end of the CMR range is dependent on VEE and is equal to VEE +1.65V.
TIMING DIAGRAM
CLK
Q (÷1)
Q (÷2)
Q (÷3)
Q (÷4)
Q (÷6)
M9999-113006
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Precision Edge®
SY100S838
SY100S838L
Micrel, Inc.
20-PIN SOIC .300" WIDE (Z20-1)
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.
© 2006 Micrel, Incorporated.
M9999-113006
[email protected] or (408) 955-1690
5