sy100s838-l Micrel Semiconductor, sy100s838-l Datasheet

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sy100s838-l

Manufacturer Part Number
sy100s838-l
Description
Sy100s838 Sy100s838 Sy100s838l ?1, ?2/3 Or ?2, ?4/6 Clock Generation Chip
Manufacturer
Micrel Semiconductor
Datasheet
NOTES:
Z = LOW-to-HIGH transition
ZZ = HIGH-to-LOW transition
Micrel, Inc.
■ 3.3V and 5V power supply options
■ 50ps output-to-output skew
■ Synchronous enable/disable
■ Master Reset for synchronization
■ Internal 75K
■ Available in 20-pin SOIC package
Precision Edge is a registered trademark of Micrel, Inc.
M9999-113006
hbwhelp@micrel.com or (408) 955-1690
F
PIN NAMES
FEATURES
TRUTH TABLE
SEL
H
H
L
L
CLK
ZZ
X
Z
CLK
F
EN
MR
V
Q
Q
DIVSEL
SEL
BB
0,
2,
Pin
DIVSEL
Q
Q
1
3
H
H
L
L
input pull-down resistors
EN
H
X
L
Q
0,
Divide by 2
Divide by 2
Divide by 1
Divide by 1
Differential Clock Inputs
Function Select Input
Synchronous Enable
Master Reset
Reference Output
Differential ÷1 or ÷2 Outputs
Differential ÷2/3 or ÷4/6 Outputs
Frequency Select Input
Q
1
OUTPUTS
MR
H
L
L
Function
Q
Divide
Hold Q
Reset Q
2,
Divide by 4
Divide by 6
Divide by 2
Divide by 3
Q
Function
3
(
CLOCK GENERATION CHIP
OUTPUTS
÷
0–3
0–3
1,
÷
2/3) OR (
1
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 V
coupled into the device. If a single-ended input is to be
used, the V
input and bypassed to ground via a 0.01µF capacitor.
The V
reference for the input of the SY100S838/L under single-
ended input conditions. As a result, this pin can only
source/sink up to 0.5mA of current.
what clock generation chip function is. When FS
is LOW, SY100S838/L functions as a divide by 2 and by
4/6 clock generation chip. However, if FS
it functions as a divide by 1 and by 2/3 clock chip.
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.
state; the master reset (MR) input allows for the
synchronization of the internal dividers, as well as for
multiple SY100S838/Ls in a system.
DESCRIPTION
The SY100S838/L is a low skew (÷1, ÷2/3) or (÷2, ÷4/
The Function Select (F
The common enable (EN) is synchronous so that the
Upon start-up, the internal flip-flops will attain a random
÷
BB
2,
÷
output is designed to act as the switching
4/6)
BB
BB
output should be connected to the CLK
output, a sinusoidal source can be AC-
SEL
) input is used to determine
Precision Edge
Rev.: G
Issue Date: November 2006
SY100S838L
Precision Edge
EL
SY100S838
Precision Edge
input is HIGH,
SY100S838L
SY100S838
Amendment: /0
EL
input
®
®
®

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sy100s838-l Summary of contents

Page 1

... CLOCK GENERATION CHIP DESCRIPTION The SY100S838 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 ...

Page 2

... SY100S838LZC Commercial SY100S838LZC Industrial SY100S838ZI Industrial SY100S838ZI Industrial SY100S838LZI Industrial SY100S838LZI Industrial SY100S838ZG with Pb-Free bar-line indicator Pb-Free Industrial SY100S838ZG with Pb-Free bar-line indicator Pb-Free Industrial SY100S838LZG with Pb-Free bar-line indicator Pb-Free Industrial SY100S838LZG with Pb-Free bar-line indicator Pb-Free ® SY100S838 ...

Page 3

... Series: 100S838L Series 3 Precision Edge ° ° + + -1.26 -1.38 — -1.26 -1.38 — 150 — — 150 — — -4.2V to -5.5V. -3.0V to -3.8V. ® SY100S838 SY100S838L ° C Unit 75 mA -1.26 V 150 µA ...

Page 4

... V EE ® Precision Edge SY100S838 SY100S838L ° C Unit — MHz ps 1250 1300 900 50 ps 200 — ps — — ps — — mV -0.55 V 100 ps — ...

Page 5

... Micrel Products for use in life support appliances, devices or systems is at Purchaser’s own risk and Purchaser agrees to fully indemnify M9999-113006 hbwhelp@micrel.com or (408) 955-1690 + 1 (408) 474-1000 FAX WEB Micrel for any damages resulting from such use or sale. © 2006 Micrel, Incorporated. 5 Precision Edge Rev. 03 http://www.micrel.com ® SY100S838 SY100S838L ...

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