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DS1091L

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).

Applications

Automotive Infotainment

POS Terminals

LCD Displays

Printers

Industrial Control

Features

S Spread-Spectrum Clock Output from 130kHz to

66.6MHz

S -40°C to +125°C Operating Temperature Range

S ±1.75% Accuracy Across Temperature and Voltage

S Factory Trimmed

S Center-Dithered (DS1091LUA) or Down-Dithered

(DS1091LUB) Spread-Spectrum Output

S Pin-Selectable Center-Dither Magnitude of 0%,

±1%, ±2%, or ±4%

S Pin-Selectable Down-Dither Magnitude of 0%, -2%,

-4%, or -8%

S Pin-Selectable Dither Rate

S 3.0V to 3.6V Supply Operation

S Lead(Pb)-Free, 8-Pin µMAX Package

Custom Frequency Options

Custom frequency options are available. See the Ordering

Information or contact the factory by email at custom.

oscillators@maximintegrated.com for more information.

19-5768; Rev 3; 6/13

Ordering Information appears at end of data sheet.

EconOscillator is a trademark and µMAX is a registered trademark of Maxim Integrated Products, Inc.

Typical Operating Circuit

For related parts and recommended products to use with this part, refer to: www.maximintegrated.com/DS1091L.related

OUT

DECOUPLING

CAPACITORS

SEL0

N.C.

SEL1

GND

DS1091L

For pricing, delivery, and ordering information, please contact Maxim Direct at

1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.

Summary of content (9 pages)

PAGE 1
DS1091L 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.
PAGE 2
DS1091L Automotive Temperature Range Spread-Spectrum EconOscillator™ ABSOLUTE MAXIMUM RATINGS Voltage Range on VCC Relative to Ground..........-0.5V to +6.0V Voltage Range on DR, SEL0, SEL1 Relativeto Ground................................. -0.5V to (VCC + 0.5V)* Continuous Power Dissipation (TA = +70°C) µMAX (derate 4.5mW/°C above +70°C)......................362mW Operating Temperature Range......................... -40°C to +125°C Storage Temperature Range.............................
PAGE 3
DS1091L Automotive Temperature Range Spread-Spectrum EconOscillator™ AC ELECTRICAL CHARACTERISTICS (VCC = +3.0V to +3.6V, TA = -40NC to +125NC, unless otherwise noted.) PARAMETER SYMBOL Output Frequency Range fOUT Output Center Frequency Tolerance DfOUT Power-Up Time tPU Load Capacitance CL CONDITIONS MIN (Note 3) TYP 0.130 0 UNITS 66.6 MHz VCC = 3.3V, TA = +25NC -0.25 Across TA and VCC 0NC to +70NC, across VCC -1.75 +1.75 +0.25 -1.2 +1.2 (Note 4) < 33.3MHz (Note 3) % 0.
PAGE 4
DS1091L Automotive Temperature Range Spread-Spectrum EconOscillator™ Typical Operating Characteristics (continued) (VCC = 3.3V, TA = +25°C, unless otherwise noted.) DUTY CYCLE vs. SUPPLY VOLTAGE 49.5 50 fOUT = 130kHz 48 46 49.0 NO DITHER 42 48.0 3.0 3.1 3.2 3.3 3.4 3.5 3.6 40 0.0 -40 -15 10 35 60 85 110 TIME (ns) TEMPERATURE (°C) SPECTRUM ATTENUATION vs. FREQUENCY AT DIFFERENT DITHER AMPLITUDES OUTPUT FALL TIME 5 DS1091L toc07 3.5 FALL TIME = 1.13ns TYPICAL AT 12pF LOAD 2.5 2.
PAGE 5
DS1091L Automotive Temperature Range Spread-Spectrum EconOscillator™ Pin Configuration Pin Description TOP VIEW OUT 1 + 8 NAME 1 OUT Spread-Spectrum Clock Output FUNCTION 2 VCC Supply Voltage DR 3 GND Ground 4 SEL1 5 SEL0 Spread-Spectrum Dither Magnitude Select Inputs. Selects dither magnitude (see Table 1). 6, 7 N.C. No Connection 8 DR VCC 2 7 N.C. GND 3 6 N.C. SEL1 4 5 SEL0 DS1091L PIN µMAX Spread-Spectrum Dither Rate Selector. Selects dither rate (see Table 2).
PAGE 6
DS1091L Automotive Temperature Range Spread-Spectrum EconOscillator™ Detailed Description The DS1091L clock generator is capable of output frequencies from 130kHz to 66.6MHz over the full automotive temperature range (-40°C to +125°C). The device can also produce a spread-spectrum (dithered) squarewave output using four pin-selectable dither percentages. Both center (DS1091LUA) and down (DS1091LUB) dithering options are available. The device also features two selectable dither rates.
PAGE 7
DS1091L Automotive Temperature Range Spread-Spectrum EconOscillator™ Chip Information Applications 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.
PAGE 8
DS1091L Automotive Temperature Range Spread-Spectrum EconOscillator™ Ordering Information (continued) PART TEMP RANGE SPREAD SPECTRUM OUTPUT FREQUENCY (MHz) PIN-PACKAGE DS1091LUA-172/V+T -40NC to +125NC Center 1.7 8 FMAX DS1091LUA-190/V+ -40NC to +125NC Center 1.9 8 FMAX DS1091LUA-190/V+T -40NC to +125NC Center 1.9 8 FMAX DS1091LUA-200+ -40NC to +125NC Center 0.20 8 FMAX DS1091LUA-200+T -40NC to +125NC Center 0.20 8 FMAX DS1091LUA-200/V+ -40NC to +125NC Center 0.
PAGE 9
DS1091L Automotive Temperature Range Spread-Spectrum EconOscillator™ Revision History REVISION NUMBER REVISION DATE 0 9/06 Initial release 1 3/11 Added the continuous power dissipation numbers, lead temperature, and soldering temperature to the Absolute Maximum Ratings section; updated the custom frequency technical support information; updated the Ordering Information table; added the land pattern no.