|
|
PDF SY100S839V Data sheet ( Hoja de datos )
| Número de pieza | SY100S839V | |
| Descripción | Pecl Clock Generation | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de SY100S839V (archivo pdf) en la parte inferior de esta página. Total 5 Páginas | ||
|
No Preview Available !
÷2/4, ÷4/5/6 CLOCK
GENERATION CHIP
ClockWorks™
SY100S839V
FINAL
FEATURES
DESCRIPTION
s 3.3V and 5V power supply option
The SY100S839V is a low skew ÷2/4, ÷4/5/6 clock
s 50ps output-to-output skew
s 50% duty cycle outputs
s Synchronous enable/disable
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
s Master Reset for synchronization
by either a differential or single-ended ECL/LVECL or, if
s Internal 75KΩ input pull-down resistors
s Available in 20-pin SOIC package
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 single-
ended input is to be used, the VBB output should be
connected to the /CLK input and bypassed to ground via
PIN CONFIGURATION/BLOCK DIAGRAM
a 0.01µF capacitor. The VBB output is designed to act as
the switching reference for the input of the S839V under
VCC Q0
Q0
Q1
Q1 Q2 Q2
Q3
20 19 18 17 16 15 14 13
Q3 VEE
12 11
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
TOP VIEW
SOIC
Z20-1
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
www.DataSheet4U.com
the internal divider stages. The internal enable flip-flop is
1 2 3 4 5 6 7 8 9 10
clocked on the falling edge of the input clock, therefore,
VCC EN
CLK CLK VBB MR VCC
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
TRUTH TABLE
asserted to ensure synchronization. For systems which
only use one S839V, the MR pin need not be exercised
CLK /EN MR
Function
as the internal divider designs ensures synchronization
between the ÷2/4, and the ÷4/5/6 outputs of a single
Z L L Divide
device.
ZZ H L Hold Q0–3
X X H Reset Q0–3
NOTE:
Z = LOW-to-HIGH transition
ZZ = HIGH-to-LOW transition
PIN NAMES
DIVSELa
0
1
Q0, Q1 OUTPUTS
Divide by 2
Divide by 4
Pin
CLK
/EN
Function
Differential Clock Inputs
Synchronous Enable
DIVSELb1
DIVSELb0
Q2, Q3 OUTPUTS
MR
Master Reset
0 0 Divide by 4 VBB Reference Output
0
1
Divide by 6
Q0, Q1
Differential ÷2/4 Outputs
1
0
Divide by 5
Q2, Q3
Differential ÷4/5/6 Outputs
1
1
Divide by 5
DIVSEL
Frequency Select Input
Rev.: A
Amendment: /0
1 Issue Date: May, 1999
1 page  
Micrel
20 LEAD SOIC .300" WIDE (Z20-1)
ClockWorks™
SY100S839V
Rev. 03
MICREL-SYNERGY 3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA
TEL + 1 (408) 980-9191 FAX + 1 (408) 914-7878 WEB http://www.micrel.com
This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or
other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc.
© 2000 Micrel Incorporated
5
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet SY100S839V.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| SY100S839V | Pecl Clock Generation | Micrel Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |