DS1091LN-66+ - Maxim Integrated

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 DR

VCC

fOUT

DECOUPLING

CAPACITORS

5SEL0

VCC

N.C.

SEL1

GND

VCC

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.

DS1091L

Automotive Temperature Range

Spread-Spectrum EconOscillator™

2Maxim Integrated

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 ............................ -55°C to +125°C

Lead Temperature (soldering, 10s) ................................+300°C

Soldering Temperature (reflow) ......................................+260°C

ABSOLUTE MAXIMUM RATINGS

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-

tion of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute

maximum rating conditions for extended periods may affect device reliability.

RECOMMENDED OPERATING CONDITIONS

(TA = -40NC to +125NC, unless otherwise noted.)

DC ELECTRICAL CHARACTERISTICS

(VCC = +3.0V to +3.6V, TA = -40NC to +125NC, unless otherwise noted.)

*This voltage must not exceed 6.0V.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Voltage VCC (Note 1) 3.0 3.3 3.6 V

High-Level Input Voltage

(SEL0, SEL1, DR) VIH 0.7 x

VCC

VCC +

0.3 V

Low-Level Input Voltage

(SEL0, SEL1, DR) VIL -0.3 0.3 x

VCC V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

High-Level Output Voltage (OUT) VOH IOH = -4mA, VCC = 3.0V 2.4 V

Low-Level Output Voltage (OUT) VOL IOL = 4mA 0.4 V

High-Level Input Current

(SEL0, SEL1, DR) IIH VCC = 3.6V 1 FA

Low-Level Input Current

(SEL0, SEL1, DR) IIL VIL = 0V -1 FA

Supply Current (Active) ICC (Note 2) 16 mA

DS1091L

Automotive Temperature Range

Spread-Spectrum EconOscillator™

3Maxim Integrated

Note 1: All voltages are referenced to ground. Currents entering the IC are specified positive and currents exiting the IC are negative.

Note 2: Supply current measured with CL = 15pF, VCC = 3.6V, TA = +25°C, fOUT = 66.6MHz, no dither.

Note 3: No dither.

Note 4: Guaranteed by design.

Note 5: For aging characteristics, contact factory.

AC ELECTRICAL CHARACTERISTICS

(VCC = +3.0V to +3.6V, TA = -40NC to +125NC, unless otherwise noted.)

Typical Operating Characteristics

(VCC = 3.3V, TA = +25°C, unless otherwise noted.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Output Frequency Range fOUT (Note 3) 0.130 66.6 MHz

Output Center Frequency

Tolerance DfOUT

VCC = 3.3V, TA = +25NC-0.25 0 +0.25

%Across TA and VCC -1.75 +1.75

0NC to +70NC, across VCC -1.2 +1.2

Power-Up Time tPU (Note 4) 0.1 ms

Load Capacitance CL15 50 pF

Duty Cycle < 33.3MHz (Note 3) 50 %

R 33.3MHz (Note 3) 40 60

Jitter (RMS), 50MHz 0.3 %

7.4

7.8

7.6

8.4

8.2

8.0

9.0

8.8

8.6

9.2

-40 20-10 50 80 110

SUPPLY CURRENT vs. TEMPERATURE

DS1091L toc01

TEMPERATURE (°C)

ICC (mA)

VCC = 3.6V

VCC = 3.3V

VCC = 3.0V

-1.75

-0.75

-1.25

0.25

-0.25

1.25

0.75

1.75

-40 20 50-10 80 110

FREQUENCY VARIATION

vs. TEMPERATURE

DS1091L toc02

TEMPERATURE (°C)

FREQUENCY VARIATION (%)

VCC = 3.3V

NO DITHER

fOUT = 130kHz

fOUT = 66MHz

-0.25

-0.10

-0.15

-0.20

-0.05

0.00

0.05

0.10

0.15

0.20

0.25

3.0 3.23.1 3.3 3.4 3.5 3.6

FREQUENCY VARIATION

vs. VOLTAGE

DS1091L toc03

VCC (V)

FREQUENCY VARIATION (%)

fOUT = 66MHz

fOUT = 130kHz

NO DITHER

DS1091L

Automotive Temperature Range

Spread-Spectrum EconOscillator™

4Maxim Integrated

Typical Operating Characteristics (continued)

(VCC = 3.3V, TA = +25°C, unless otherwise noted.)

48.0

48.5

49.0

49.5

50.0

50.5

51.0

51.5

52.0

3.0 3.23.1 3.3 3.4 3.5 3.6

DUTY CYCLE vs. SUPPLY VOLTAGE

DS1091L toc04

VCC (V)

DUTY CYCLE (%)

fOUT = 66MHz

fOUT = 130kHz

NO DITHER

-40 -15 10 35 60 85 110

DUTY CYCLE vs. TEMPERATURE

DS1091L toc05

TEMPERATURE (°C)

DUTY CYCLE (%)

fOUT = 66MHz

fOUT = 130kHz

NO DITHER

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

OUTPUT RISE TIME

DS1091L toc06

TIME (ns)

OUTPUT (V)

RISE TIME

= 1.02ns

TYPICAL

AT 12pF LOAD

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

OUTPUT FALL TIME

DS1091L toc07

TIME (ns)

OUTPUT (V)

FALL TIME

= 1.13ns

TYPICAL

AT 12pF LOAD

-35

-30

-25

-20

-15

-10

-5

31.9 32.932.4 33.4 33.9 34.4 34.9

SPECTRUM ATTENUATION vs. FREQUENCY

AT DIFFERENT DITHER AMPLITUDES

DS1091L toc08

FREQUENCY (MHz)

ATTENUATION (dB)

±1%

±2%

±4%

8dB 11dB 14dB

fOUT = 33.3MHz

RBW = 120kHz

CENTER DITHER

DS1091L

Automotive Temperature Range

Spread-Spectrum EconOscillator™

5Maxim Integrated

Pin Configuration Pin Description

Block Diagram

PIN NAME FUNCTION

1 OUT Spread-Spectrum Clock Output

2 VCC Supply Voltage

3 GND Ground

4 SEL1 Spread-Spectrum Dither Magnitude

Select Inputs. Selects dither

magnitude (see Table 1).

5 SEL0

6, 7 N.C. No Connection

8 DR Spread-Spectrum Dither Rate Selector.

Selects dither rate (see Table 2).

N.C.

SEL0SEL1

GND

VCC

OUT

µMAX

TOP VIEW

DS1091L

FACTORY-PROGRAMMED

MASTER OSCILLATOR

DITHER RATE DIVIDER TRIANGLE-WAVE GENERATOR

(DITHER %)

FACTORY-PROGRAMMED

PRESCALER

SEL0SEL1DR

OUT

fOUT

VCC

GND

fMOSC IS THE MASTER OSCILLATOR FREQUENCY.

fMOSC

fDITHER

fMOSC

DS1091L

Automotive Temperature Range

Spread-Spectrum EconOscillator™

6Maxim Integrated

Detailed Description

The DS1091L clock generator is capable of output fre-

quencies from 130kHz to 66.6MHz over the full automo-

tive temperature range (-40°C to +125°C). The device

can also produce a spread-spectrum (dithered) square-

wave output using four pin-selectable dither percent-

ages. Both center (DS1091LUA) and down (DS1091LUB)

dithering options are available. The device also features

two selectable dither rates.

The DS1091L is shipped from the factory programmed to

a customer-specified frequency.

Spread Spectrum

The DS1091L can reduce radiated emission peaks. The

dither percentage is controlled by the state of the SEL0

and SEL1 pins. The output frequency can be dithered

at 0%, ±1%, ±2%, and ±4%, centered around the pro-

grammed frequency (for the DS1091LUB this can be

down dithered by 0%, -2%, -4%, and -8%).

The two select pins SEL0 and SEL1 provide a means of

selecting the dither magnitudes as follows:

A triangle-wave generator injects a control signal into the

master oscillator to dither its output. The dither rate is a

function of the output frequency, fOUT, as well as the set-

ting of the DR pin (see the equation below). Figure 1A and

Figure 1B show a plot of the output frequency vs. time.

OUT

DITHER RATE

where n is defined in Table 2 as a function of output

frequency. For example, for an output frequency of

27.0MHz, the dither rate would be 13.2kHz for DR = 1

and 6.6kHz for DR = 0.

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 ini-

tial power-up.

DS1091L Frequency Spreading Profile as a Function of Dither %

Figure 1A. Center Dithered Figure 1B. Down Dithered

Table 1. Dither Magnitude

Table 2. Value of n w.r.t. Output Frequency

SEL1

LOGIC

LEVEL

SEL0

LOGIC

LEVEL

DITHER MAGNITUDE (%)

DS1091LUA DS1091LUB

0 0 No dither No dither

0 1 Q1-2

1 0 Q2-4

1 1 Q4-8

OUTPUT FREQUENCY fOUT

(MHz) n

fOUT (min) fOUT (max) DR = LOGIC

LEVEL 1

DR = LOGIC

LEVEL 0

0.130 0.260 4 5

0.261 0.521 5 6

0.522 1.042 6 7

1.043 2.083 7 8

2.084 4.167 8 9

4.168 8.333 9 10

8.334 16.667 10 11

16.668 33.333 11 12

33.334 66.667 12 13

TIME

DITHER FREQ

PROGRAMMED fOUT+

(1%, 2%, OR 4% OF fOUT)

PROGRAMMED fOUT-

(1%, 2%, OR 4% OF fOUT)

PROGRAMMED fOUT

DITHER

AMOUNT

(±1%, ±2%,

OR ±4%)

IF DITHER AMOUNT = 0%

fOUT

TIME

DITHER FREQ

PROGRAMMED fOUT

PROGRAMMED fOUT-

(2%, 4%, OR 8% OF fOUT)

DITHER

AMOUNT

(-2%, -4%,

OR -8%)

IF DITHER AMOUNT = 0%

fOUT

DS1091L

Automotive Temperature Range

Spread-Spectrum EconOscillator™

7Maxim Integrated

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.

Chip Information

SUBSTRATE CONNECTED TO GROUND

Package Information

For the latest package outline information and land patterns (foot-

prints), go to www.maximintegrated.com/packages. Note that a

“+”, “#”, or “-” in the package code indicates RoHS status only.

Package drawings may show a different suffix character, but the

drawing pertains to the package regardless of RoHS status.

Ordering Information

Ordering Information continued on next page.

/V denotes an automotive qualified part.

+Denotes a lead(Pb)-free/RoHS-compliant package.

T = Tape and reel.

PACKAGE

TYPE

PACKAGE

CODE

OUTLINE

NO.

LAND

PATTERN NO.

8 µMAX U8+1 21-0036 90-0092

PART TEMP RANGE SPREAD SPECTRUM OUTPUT FREQUENCY (MHz) PIN-PACKAGE

DS1091LUA-027+ -40NC to +125NCCenter 27.0 8 FMAX

DS1091LUA-027+T -40NC to +125NCCenter 27.0 8 FMAX

DS1091LUA-030/V+ -40NC to +125NCCenter 30.0 8 FMAX

DS1091LUA-030/V+T -40NC to +125NCCenter 30.0 8 FMAX

DS1091LUA-033+ -40NC to +125NCCenter 33.3 8 FMAX

DS1091LUA-033+T -40NC to +125NCCenter 33.3 8 FMAX

DS1091LUA-033/V+ -40NC to +125NCCenter 33.3 8 FMAX

DS1091LUA-033/V+T -40NC to +125NCCenter 33.3 8 FMAX

DS1091LUA-040+ -40NC to +125NCCenter 40.0 8 FMAX

DS1091LUA-040+T -40NC to +125NCCenter 40.0 8 FMAX

DS1091LUA-040/V+ -40NC to +125NCCenter 40.0 8 FMAX

DS1091LUA-040/V+T -40NC to +125NCCenter 40.0 8 FMAX

DS1091LUA-055/V+ -40NC to +125NCCenter 55.4 8 FMAX

DS1091LUA-055/V+T -40NC to +125NCCenter 55.4 8 FMAX

DS1091LUA-066+ -40NC to +125NCCenter 66.6 8 FMAX

DS1091LUA-066+T -40NC to +125NCCenter 66.6 8 FMAX

DS1091LUA-066/V+ -40NC to +125NCCenter 66.6 8 FMAX

DS1091LUA-066/V+T -40NC to +125NCCenter 66.6 8 FMAX

DS1091LUA-10A/V+ -40NC to +125NCCenter 10.38 8 FMAX

DS1091LUA-10A/V+T -40NC to +125NCCenter 10.38 8 FMAX

DS1091LUA-172/V+ -40NC to +125NCCenter 1.7 8 FMAX

DS1091L

Automotive Temperature Range

Spread-Spectrum EconOscillator™

8Maxim Integrated

Ordering Information (continued)

/V denotes an automotive qualified part.

+Denotes a lead(Pb)-free/RoHS-compliant package.

T = Tape and reel.

xxx Denotes factory-programmed custom frequencies. Email custom.oscillators@maximintegrated.com for more information.

PART TEMP RANGE SPREAD SPECTRUM OUTPUT FREQUENCY (MHz) PIN-PACKAGE

DS1091LUA-172/V+T -40NC to +125NCCenter 1.7 8 FMAX

DS1091LUA-190/V+ -40NC to +125NCCenter 1.9 8 FMAX

DS1091LUA-190/V+T -40NC to +125NCCenter 1.9 8 FMAX

DS1091LUA-200+ -40NC to +125NCCenter 0.20 8 FMAX

DS1091LUA-200+T -40NC to +125NCCenter 0.20 8 FMAX

DS1091LUA-200/V+ -40NC to +125NCCenter 0.20 8 FMAX

DS1091LUA-200/V+T -40NC to +125NCCenter 0.20 8 FMAX

DS1091LUA-330+ -40NC to +125NCCenter 33.0 8 FMAX

DS1091LUA-330+T -40NC to +125NCCenter 33.0 8 FMAX

DS1091LUA-330/V+ -40NC to +125NCCenter 33.0 8 FMAX

DS1091LUA-330/V+T -40NC to +125NCCenter 33.0 8 FMAX

DS1091LUA-xxx+ -40NC to +125NCCenter Custom (contact factory) 8 FMAX

DS1091LUB-008+T -40NC to +125NCDown 8.0 8 FMAX

DS1091LUB-016/V+ -40NC to +125NCDown 16.6 8 FMAX

DS1091LUB-016/V+T -40NC to +125NCDown 16.6 8 FMAX

DS1091LUB-019/V+ -40NC to +125NCDown 19.9 8 FMAX

DS1091LUB-019/V+T -40NC to +125NCDown 19.9 8 FMAX

DS1091LUB-025/V+ -40NC to +125NCDown 25.0 8 FMAX

DS1091LUB-025/V+T -40NC to +125NCDown 25.0 8 FMAX

DS1091LUB-027+ -40NC to +125NCDown 27.0 8 FMAX

DS1091LUB-027+T -40NC to +125NCDown 27.0 8 FMAX

DS1091LUB-027/V+ -40NC to +125NCDown 27.0 8 FMAX

DS1091LUB-027/V+T -40NC to +125NCDown 27.0 8 FMAX

DS1091LUB-033+ -40NC to +125NCDown 33.3 8 FMAX

DS1091LUB-033+T -40NC to +125NCDown 33.3 8 FMAX

DS1091LUB-066+ -40NC to +125NCDown 66.6 8 FMAX

DS1091LUB-066+T -40NC to +125NCDown 66.6 8 FMAX

DS1091LUB-xxx+ -40NC to +125NCDown Custom (contact factory) 8 FMAX

DS1091L

Automotive Temperature Range

Spread-Spectrum EconOscillator™

Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent

licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and

max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.

Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 9

Revision History

REVISION

NUMBER

REVISION

DATE DESCRIPTION PAGES

CHANGED

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. to the Package Information table

1, 2, 7

2 9/11 Updated the Ordering Information table 7

3 6/13 Updated the Ordering Information table (adding rows) 7, 8