参数资料
型号: SY100S834LZG
厂商: Micrel Inc
文件页数: 1/8页
文件大小: 0K
描述: IC CLOCK GEN 3.3/5V 16-SOIC
标准包装: 48
系列: Precision Edge®
类型: 时钟发生器
PLL:
输入: ECL,PECL
输出: 时钟
电路数: 1
比率 - 输入:输出: 1:3
差分 - 输入:输出: 是/是
除法器/乘法器: 是/无
电源电压: 3 V ~ 3.8 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-SOIC(0.154",3.90mm 宽)
供应商设备封装: 16-SOIC
包装: 管件
产品目录页面: 1088 (CN2011-ZH PDF)
其它名称: 576-2012-5
SY100S834LZG-ND
SY100S834/SY100S834L
(
÷1, ÷2, ÷4) or (÷2, ÷4, ÷8) Clock
Generation Chip
Precision Edge
Precision Edge is a registered trademark of Micrel, Inc.
Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (
408) 944-0800 fax + 1 (408) 474-1000 http://www.micrel.com
June 2011
M9999-060911
hbwhelp@micrel.com
General Description
The SY100S834/L is low skew (÷1, ÷2, ÷4) or (÷2, ÷4, ÷8)
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 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 a 0.01F capacitor. The
VBB output is designed to act as the switching reference
for the input of the SY100S834/L under single-ended 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, SY100S834/L functions as a divide by 2, by 4 and
by 8 clock generation chip. However, if FSEL input is
HIGH, it functions as a divide by 1, by 2 and by 4 clock
generation chip. This latter feature will increase the clock
frequency by two folds.
or (408) 955-1690
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 SY100S834/Ls in a system.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Precision Edge
Features
3.3V (SY100S834L) and 5V (SY100S834) power
supply options
50ps output-to-output skew
Synchronous enable/disable
Master reset for synchronization
Internal 75K input pulldown resistors
Available in 16-pin SOIC package
Truth Table
CLK
EN
MR
Function
Z
L
Divide
ZZ
H
L
Hold Q02
X
H
Reset Q02
Notes:
Z = LOW-to-HIGH transition.
ZZ = HIGH-to-LOW transition.
FSEL
Q0 Outputs
Q1 Outputs
Q2 Outputs
L
Divide by 2
Divide by 4
Divide by 8
H
Divide by 1
Divide by 2
Divide by 4
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