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DS1091L Schematic ( PDF Datasheet ) - Maxim Integrated Products

Teilenummer DS1091L
Beschreibung Automotive Temperature Range Spread Spectrum Econoscillator
Hersteller Maxim Integrated Products
Logo Maxim Integrated Products Logo 




Gesamt 6 Seiten
DS1091L Datasheet, Funktion
www.DataSheet4U.com
Rev 0; 9/06
Automotive Temperature Range
Spread-Spectrum Econoscillator
General Description
The DS1091L is a low-cost clock generator that is factory-
trimmed to output frequencies from 130kHz to 66.6MHz
with a nominal accuracy of ±0.25%. The device can also
produce a center- or down-dithered spread-spectrum
output with pin-selectable dither magnitude and rate.
Assembled in an 8-pin µMAX package, the DS1091L is
designed to operate with a 3.0V to 3.6V power supply
over the automotive temperature range (-40°C to
+125°C).
Automotive Infotainment
POS Terminals
LCD Displays
Printers
Industrial Control
Applications
Features
Spread-Spectrum Clock Output from 130kHz to
66.6MHz
Operating Temperature Range of -40°C to +125°C
Accuracy of ±1.75% Across Temperature and
Voltage
Factory Trimmed
Center-Dithered (DS1091LA) or Down-Dithered
(DS1091LB) Spread-Spectrum Output
Pin-Selectable Center-Dither Magnitude of 0%,
±1%, ±2%, or ±4%
Pin-Selectable Down-Dither Magnitude of 0%, -2%,
-4%, or -8%
Pin-Selectable Dither Rate
3.0V to 3.6V Supply Operation
Lead-Free 8-Pin µMAX Package
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE SPREAD SPECTRUM OUTPUT FREQUENCY (MHz)
DS1091LUA+027
-40°C to +125°C
8 µMAX
Center
27.0
DS1091LUA+033
-40°C to +125°C
8 µMAX
Center
33.3
DS1091LUA+066
-40°C to +125°C
8 µMAX
Center
66.6
DS1091LUA+xxx
-40°C to +125°C
8 µMAX
Center
Custom (Contact Factory)
DS1091LUB+027
-40°C to +125°C
8 µMAX
Down
27.0
DS1091LUB+033
-40°C to +125°C
8 µMAX
Down
33.3
DS1091LUB+066
-40°C to +125°C
8 µMAX
Down
66.6
DS1091LUB+xxx
-40°C to +125°C
8 µMAX
Down
Custom (Contact Factory)
+Denotes lead-free package.
xxx Denotes factory-programmed custom frequencies.
Email [email protected] for information/questions concerning custom frequencies.
Typical Operating Circuit
Pin Configuration
fOUT
VCC
DECOUPLING
CAPACITORS
OUT 1
VCC 2
GND
3
SEL1 4
DS1091L
VCC
DR
8
N.C.
7
6 N.C. VCC
5 SEL0
TOP VIEW
OUT 1
VCC 2
GND 3
SEL1 4
DS1091L
µμMAX
8 DR
7 N.C.
6 N.C.
5 SEL0
88 µμMAXX
______________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
DataSheet4 U .com






DS1091L Datasheet, Funktion
www.DataSheet4U.com
Automotive Temperature Range
Spread-Spectrum Econoscillator
PROGRAMMED fOUT+
(1%, 2%, OR 4% OF fOUT)
PROGRAMMED fOUT
PROGRAMMED fOUT-
(1%, 2%, OR 4% OF fOUT)
IF DITHER AMOUNT = 0%
DITHER
AMOUNT
(±1%, ±2%,
OR ±4%)
1
DITHER FREQ
Figure 1A. Center Dithered
TIME
Power-Up
Upon the application of power, the DS1091L output is
held in the low state until tPU has elapsed. This
removes any possibility of erroneous output transitions
during initial power-up.
DS1091L Frequency Spreading Profile as a
Function of Dither %
Application Information
Power-Supply Decoupling
To achieve best results, it is highly recommended that
decoupling capacitors are used on the IC power-supply
pins. Typical values of decoupling capacitors are 0.01µF
and 0.1µF. Use a high-quality, ceramic, surface-mount
capacitor, and mount it as close as possible to the VCC
and GND pins of the IC to minimize lead inductance.
Requesting Custom Frequencies
information/questions concerning custom frequencies.
Chip Topology
TRANSISTOR COUNT: 4887
SUBSTRATE CONNECTED TO GROUND
Package Information
For the latest package outline information, go to
www.maxim-ic.com/DallasPackInfo.
PROGRAMMED fOUT
PROGRAMMED fOUT-
(2%, 4%, OR 8% OF fOUT)
1
DITHER FREQ
IF DITHER AMOUNT = 0%
DITHER
AMOUNT
(-2%, -4%,
OR -8%)
Figure 1B. Down Dithered
TIME
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2006 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
is a registered trademark of Dallas Semiconductor Corporation.
Springer
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