NOT RECOMMENDED FOR NEW DESIGNS
SY10EL34/L SY100EL34/L
5V/3.3V ÷2, ÷4, ÷8 Clock Generation Chip Precision Edge®
General Description
The SY10/100EL34/L are low-skew ÷2, ÷4, ÷8 clock generation chips 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 VBB output is designed to act as the switching reference for the input of the EL34/L 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 divider stages. The internal enable flipflop 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 EL34/Ls in a system.
Data sheets and support documentation can be found on Micrel’s web site at: www.micrel.com.
Features
Precision Edge®
• 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 16-pin SOIC package
Pin Description
Pin Name CLK
EN MR VBB Q0 Q1 Q2
Pin Function Differential clock inputs.
Synchronous enable.
Master reset. Reference output. Differential ÷2 outputs. Differential ÷4 outputs. Differential ÷8 outputs.
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
December 2011
M9999-120611-I
[email protected] or (408) 955-1690
Micrel, Inc.
Ordering Information
Part Number SY10EL34LZG SY10EL34LZGTR(2) SY100EL34LZG SY100EL34LZGTR(2) SY10EL34ZG SY10EL34ZGTR(2) SY100EL34ZG SY100EL34ZGTR(2)
Package Type Z16-2 Z16-2 Z16-2 Z16-2 Z16-2 Z16-2 Z16-2 Z16-2
Operating Range Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial
Package Marking
SY10EL34LZG with Pb-Free Bar Line Indicator
SY10EL34LZG with Pb-Free Bar Line Indicator
SY100EL34LZG with Pb-Free Bar Line Indicator
SY100EL34LZG with Pb-Free Bar Line Indicator
SY10EL34ZG with Pb-Free Bar Line Indicator
SY10EL34ZG with Pb-Free Bar Line Indicator
SY100EL34ZG with Pb-Free Bar Line Indicator
SY100EL34ZG with Pb-Free Bar Line Indicator
Notes: 1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC electricals only. 2. Tape and reel.
Pin Configuration
Precision Edge® SY10EL34/L
SY100EL34/L
Lead Finish Pb-Free NiPdAu Pb-Free NiPdAu Pb-Free NiPdAu Pb-Free NiPdAu Pb-Free NiPdAu Pb-Free NiPdAu Pb-Free NiPdAu Pb-Free NiPdAu
December 2011
16-Pin Narrow SOIC (Z16-2)
3 M9999-120611-I
[email protected] or (408) 955-1690
Micrel, Inc.
DC Electrical Characteristics(1)
VEE = VEE (minimum) to VEE (maximum); VCC = GND.
Symbol
Parameter
TA = −40°C Power Supply Current
IEE
Output Reference Voltage VBB
IIH TA = 0°C
IEE
Input High Current Power Supply Current
Output Reference Voltage VBB
IIH TA = +25°C
IEE
Input High Current Power Supply Current
Output Reference Voltage VBB
IIH TA = +85°C
IEE
Input High Current Power Supply Current
Output Reference Voltage VBB
IIH Input High Current
Note: 1. Parametric values specified at:
− 5V Power Supply Range: 100EL34 Series: −4.2V to −5.5V 10EL34 Series: −4.75V to −5.5V
− 3V Power Supply Range: 10/100EL34L Series: −3.0V to −3.8V
10EL 100EL
10EL 100EL
10EL 100EL
10EL 100EL
10EL 100EL
10EL 100EL
10EL 100EL
10EL 100EL
Min.
− −
−1.43 −1.38
−
− −
−1.38 −1.38
−
− −
−1.35 −1.38
−
− −
−1.31 −1.38
−
Typ. − −
− − −
− − −
− − −
−
Precision Edge® SY10EL34/L
SY100EL34/L
Max.
49 49
−1.30 −1.26 150
49 49
−1.27 −1.26 150
49 49
−1.25 −1.26 150
49 54
−1.19 −1.26 150
Units mA V µA mA V µA mA V µA mA V µA
December 2011
4 M9999-120611-I
[email protected] or (408) 955-1690
Micrel, Inc.
AC Electr.