Crystal-less™ Configurable Two Output Clock Generator
Specifications
(Unless specified otherwise: T=25° C,
VDD =3.3V)
Parameter
Supply Voltage
1
Condition
V
DD
I
DD
EN pin low – outputs are disabled
Includes frequency variations due
to initial tolerance, temp. and
power supply voltage
1 year @25°C
T=25°C
Min.
2.25
Typ.
21
Max.
3.6
23
±25
±50
±5
5
Unit
V
mA
ppm
ppm
ms
V
ns
ns
kΩ
Supply Current
2
Frequency Stability
6
Δf
Δf
t
SU
V
IH
V
IL
t
DA
t
EN
Aging
Startup Time
3
Input Logic Levels
Input logic high
Input logic low
Output Disable Time
4
Output Enable Time
Pull-Up Resistor
2
Output Logic Levels
Output logic high
Output logic low
Output Transition time
4
Rise Time
Fall Time
Frequency
Output Duty Cycle
Period Jitter
5
Integrated Phase Noise
Notes:
1.
2.
3.
4.
5.
6.
0.75xV
DD
-
-
0.25xV
DD
5
20
40
Pull-up exists on all digital IO
V
OH
V
OL
t
R
t
F
f
0
SYM
J
PER
J
CC
I=±6mA
20% to 80%
C
L
=15pf
Commercial/Industrial temp range
Automotive temp range
F
O1
=F
O2
=25 MHz
200kHz to 20MHz @ 25 MHz
100kHz to 20MHz @ 25 MHz
12kHz to 20MHz @ 25 MHz
2.3
45
0.9xV
DD
-
-
0.1xV
DD
1.1
1.4
2
2
170
100
55
V
ns
MHz
%
ps
RMS
ps
RMS
3
0.3
0.38
1.7
2
Pin 4 V
DD
should be filtered with 0.01uf capacitor.
Output is enabled if Enable pad is floated or not connected. Operating current = Discabled Current + ΔIDD from Fout1 + ΔIDD from Fout2. See Current Consumption
graph on next page.
t
su
is time to 100PPM stable output frequency after V
DD
is applied and outputs are enabled.
Output Waveform and Test Circuit figures below define the parameters.
Period Jitter includes crosstalk from adjacent output.
Crystal-less™ Configurable Two Output Clock Generator
Ordering
Information
DSC2311
Package
K: 2520 QFN package
Temp Range
E: -20 to 70
I: -40 to 85
L: -40 to 105
M: -55 to 125
Stability
1: ±50ppm
2: ±25ppm
K I 2 - R0001 T
Packing
T: Tape & Reel
: Tube
Frequency Code
Rxxxx: Custom
Output Clock Frequencies
Output frequencies are factory configured to individual customer and product requirements, subject
to output control and divider limitations. Contact sales with your custom frequency needs.
Frequency Code
R0001
R0002
Fout1 MHz
127
25
Fout2 MHz
127
125
Disclaimer:
Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This information
is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry, specifications and
descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted
by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability whatsoever, and Micrel disclaims
any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties relating to fitness for a particular purpose,
merchantability, or infringement of any patent, copyright or other intellectual property right.
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 a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any
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