DS1099U-BC+T - Maxim Integrated - Datasheet.Directory

General Description

The DS1099 is a low-cost, low-power, low-frequency

silicon oscillator that generates two square-wave out-

puts with frequencies between 0.25Hz and 1.048MHz.

Individual output enables allow both outputs to be

enabled/disabled independently. Both outputs are

capable of sinking 16mA, allowing them to directly

interface to light-emitting diodes (LEDs) as well as other

external circuitry. The DS1099 operates over a wide

supply voltage, making it suitable for both 3V and 5V

systems. The device is shipped from the factory custom

programmed and calibrated, ready to be inserted into

the end application.

Contact the factory for custom frequencies or require-

ments.

Applications

●Flashing LED Status Indicators

●Consumer Appliances

●Servers

●Printers

●Switch-Mode Power Supplies

Features

●Low-Cost, Low-Frequency EconOscillator™ with

Dual Outputs

●Factory Programmed

●Output Frequencies Independently Programmable

from 0.25Hz to 1.048MHz

●2.7V to 5.5V Single-Supply Operation

●No External Timing Components Required

●Independent Output Enables

●CMOS/TTL-Compatible Outputs

●Oscillator Outputs Capable of Sinking 16mA to

Directly Drive LEDs

●Relieves Microprocessor of Periodic Interrupt

●Low-Power Consumption

●Operating Temperature Range: -40°C to +125°C

●±100ppm/°C Temp Drift (max)

19-7629; Rev 2; 5/15

EconOscillator is a trademark of Maxim Integrated Products, Inc.

Ordering information is continued on the last page.

*Where α 0 and α 1 specify the factory-programmed divider

settings for OUT0 and OUT1, respectively.

PART TEMP RANGE PIN-PACKAGE

DS1099U- a O a 1 -40°C to +125°C 8 µSOP

Ordering Information

OUT0

OUT1

GND

OE0

VCC

OE1

N.C.

OE1 CAN INSTEAD

BE TIED TO VCC

IF OUT1 IS NOT USED.

OUTPUTS CAPABLE OF

SINKING 16mA

DS1099

OE1

OEOGND

N.C.

N.C.OUT0

VCC

OUT1

µSOP

TOP VIEW

DS1099

Pin CongurationTypical Operating Circuit

DS1099 Low-Frequency Dual EconOscillator

Voltage Range on VCC Relative to Ground .........-0.5V to +6.0V

Voltage Range on OE0 and OE1

Relative to Ground .................................. -0.5V to (VCC + 0.5V),

not to exceed 6.0V

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

Storage Temperature Range ............................ -55°C to +125°C

Soldering Temperature ......................................See IPC/JEDEC

J-STD-020A Specification

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

(VCC = +2.7V to +5.5V, TA = -40°C to +125°C, unless otherwise noted.)

(TA = -40°C to +125°C)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Standby Supply Current ISTBY OE0 = OE1 = VCC 145 275 µA

Active Supply Current (Note 2) ICC

CL = 15pF per output,

OE0 = OE1 = GND,

VCC = 3.3V

1.048MHz (both) 323

µA4kHz (both) 146

1Hz (both) 145

High-Level Output Voltage

(OUT0, OUT1) VOH IOH = -1mA, VCC = MIN 2.4 V

Low-Level Output Voltage

(OUT0, OUT1) VOL

IOL = 16mA (-40°C to +85°C)

IOL = 12mA (-40°C to +125°C) 0.4 V

High-Level Input Current

(OE0, OE1)IIH VIH = VCC +1.0 µA

Low-Level Input Current

(OE0, OE1)IIL VIL = 0.0V -1.0 µA

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Voltage VCC (Note 1) 2.7 5.5 V

Input Logic 1 (OE0, OE1) VIH

0.7 x

VCC

VCC +

0.3 V

Input Logic 0 (OE0, OE1) VIL -0.3 +0.3 x

VCC

DC Electrical Characteristics

Recommended DC Operating Conditions

Absolute Maximum Ratings

DS1099 Low-Frequency Dual EconOscillator

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│

(VCC = +5.0V, TA = +25°C, unless otherwise noted.)

Note 1: All voltages referenced to ground.

Note 2: Active supply current combines the standby current with the output current. The output current is defined by

I = (CLOAD + 12pF ) x VCC x fOUT for each output when enabled.

Note 3: This is the change observed in output frequency due to changes in temperature or voltage.

Note 4: This parameter is guaranteed by design.

Note 5: This indicates the time between power-up and the outputs becoming active.

(VCC = +2.7V to +5.5V, TA = -40°C to +125°C, unless otherwise noted.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Master Oscillator Frequency fMOSC 1.048 MHz

Nominal Output Frequency fOUT0,

fOUT1

0.25 1,048,000 Hz

Output Frequency Tolerance ∆fOUT TA = +25°C, VCC = 4.1V -1.0 +1.0 %

Voltage Frequency Variation

(Note 3) ∆fOUT

TA = +25°C 3300 ppm/V

2.7V to 5.5V, TA = +25°C -2.0 +2.5 %

Temperature Frequency Variation ∆fOUT (Notes 3, 4) -100 +100 ppm/°C

Output Duty Cycle 45 55 %

Power-Up Time tPU (Note 5) 10 ms

Output Rise/Fall Time tR, tFCL = 15pF (both) 20 ns

SUPPLY CURRENT vs. OUTPUT LOAD

(BOTH OUTPUTS LOADED EQUALLY), TA = +25°C

DS1099 toc03

CL (pF)

SUPPLY CURRENT (mA)

40302010

0.2

0.4

0.6

0.8

1.0

1.2

0 50

VCC = 5.5V

VCC = 4.0V

VCC = 2.7V

SUPPLY CURRENT vs. TEMPERATURE

VCC = 5.5V, CL = 15pF

DS1099 toc02

TEMPERATURE (°C)

SUPPLY CURRENT (µA)

603510-15

100

200

300

400

500

600

700

-40 85

OUT0 = OUT1 = 1MHz

OUT0 = OUT1 = 0.25Hz

OUT0 =1MHz,

OUT1 = 0.25Hz

SUPPLY CURRENT vs. SUPPLY VOLTAGE

CL = 15pF, TA = +25°C

DS1099 toc01

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (µA)

4.84.13.4

100

200

300

400

500

600

700

2.7 5.5

OUT0 = OUT1 = 1MHz

OUT0 = OUT1 = 0.25Hz

OUT0 =1MHz,

OUT1 = 0.25Hz

Typical Operating Characteristics

AC Electrical Characteristics

DS1099 Low-Frequency Dual EconOscillator

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│

(VCC = +5.0V, TA = +25°C, unless otherwise noted.)

Typical Operating Characteristics (continued)

PIN NAME FUNCTION

1OUT1 Oscillator Outputs. Each output is forced high when the corresponding OE is high.

2OUT0

3 VCC Positive Supply Terminal

4 GND Ground

5OE0 Output Enable for OUT0 and OUT1, respectively. When low, the outputs are enabled. When high, the

corresponding output is disabled (forced high).

6OE1

7, 8 N.C. No Connection

OUTPUT VOLTAGE HIGH vs. OUTPUT CURRENT

DS1099 toc09

IOH (mA)

VOH (V)

-1-2-3-4

2.3

2.4

2.5

2.6

2.7

2.8

2.2

-5 0

VCC = 2.7V, TA = +25°C

OUT0

OUT1

OUTPUT VOLTAGE LOW vs. OUTPUT CURRENT

DS1099 toc08

IOL (mA)

VOLTAGE (V)

15105

0.1

0.2

0.3

0.4

0.5

0 20

VCC = 2.7V, TA = +25°C

OUT0

OUT1

FREQUENCY CHANGE vs. TEMPERATURE

fOUT = 1MHz, VCC = 4.0V, CL = 15pF

DS1099 toc07

TEMPERATURE (°C)

FREQUENCY (% CHANGE)

603510-15

-0.5

0.5

1.0

-1.0

-40 85

FREQUENCY CHANGE vs. SUPPLY VOLTAGE

fOUT = 1MHz, TA = +25°C, CL = 15pF

DS1099 toc06

SUPPLY VOLTAGE (V)

FREQUENCY (% CHANGE)

4.84.13.4

-0.5

0.5

1.0

-1.0

2.7 5.5

DUTY CYCLE vs. SUPPLY VOLTAGE

OUT0 = OUT1 = 1MHz, CL = 15pF

DS1099 toc05

SUPPLY VOLTAGE (V)

DUTY CYCLE (% CHANGE)

4.84.13.4

49.0

50.0

51.0

52.0

48.0

2.7 5.5

TA = -40°C

TA = +25°C

TA = +85°C

SUPPLY CURRENT vs. VOLTAGE

OEO = OE1 = VCC

DS1099 toc04

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (µA)

4.84.13.4

110

120

130

140

150

160

170

180

100

2.7 5.5

TA = +25°C

Pin Description

DS1099 Low-Frequency Dual EconOscillator

Maxim Integrated

│

www.maximintegrated.com

Detailed Description

The DS1099 consists of a fixed-frequency 1.048MHz

master oscillator followed by two independent facto-

ry-programmable dividers. The two divider outputs

are connected to pins OUT0 and OUT1, which are

independently enabled/disabled using the output-enable

pins, OE0 and OE1, respectively. When the output-en-

able pins are active (low), the corresponding outputs are

enabled. If either output-enable pin is tied to its inactive

state (high), then the corresponding output is disabled

and forced high immediately. The output- enable pins only

disable the corresponding output driver(s) and do not shut

down the master oscillator or the dividers.

Since the master oscillator frequency, fMOSC, is fixed, the

frequency of OUT0 and OUT1 is determined by DIVIDER

0 and DIVIDER 1, respectively. And since each output

has its own divider, fOUT0 and fOUT1 can be programmed

independent of each other.

The frequency of the outputs are calculated as follows:

fOUT0 = fMOSC/2X0 = 1.048MHz/2X0

fOUT1 = fMOSC/2X1 = 1.048MHz/2X1

where X0 is the DIVIDER 0 setting and X1 is the DIVIDER

1 setting. Valid values for X0 and X1 are integers 0 to 22

(dec).

Table 1 shows output frequencies and divider values for

the range of divider settings.

Table 1. Divider Settings and Output

Frequencies

DIVIDER SETTING

X0 OR X1

DIVISOR fOUT0 OR fOUT1

0 1 1.048MHz

1 2 0.524MHz

2 4 0.262MHz

3 8 0.131MHz

4 16 65.50kHz

5 32 32.75kHz

———

19 524,288 2Hz

20 1,048,576 1Hz

21 2,097,152 0.5Hz

22 4,194,304 0.25Hz

GND

MASTER

OSCILLATOR

1.048MHz

DIVIDER 0

DIVIDE BY 2X

(X = X0 = 0...22)

DIVIDER 1

DIVIDE BY 2X

(X = X1 = 0...22)

VCC

OE1

OE0

OUT0

OUT1

fOUT0

fOUT1

fMOSC

FACTORY-

PROGRAMMED

EEPROM

OUTPUT

DRIVER

OUTPUT

DRIVER

DS1099

Functional Diagram

DS1099 Low-Frequency Dual EconOscillator

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│

The divider settings, X0 and X1, are factory pro-

grammed. When placing an order for the DS1099, it is

required to specify X0 and X1. If only one output is used,

it is recommended that the unused output be disabled.

The oscillator outputs are asynchronous. Since the

master oscillator and dividers are free running, even

when both outputs are disabled, the state of the output

when OE becomes active is unknown for up to half an

fOUT period. When OE is brought low, the output is

enabled instantaneously. Likewise, if the output is dis-

abled while outputting the low half of a cycle, the out-

put instantaneously is forced high before the current

cycle is completed.

Applications Information

Power-Supply Decoupling

To achieve best results, it is highly recommended that

a decoupling capacitor is 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.

aDIVISOR fOUT

A 201.048MHz

B 210.524MHz

C 220.262MHz

D 230.131MHz

E 2465.50kHz

F 2532.750kHz

G 2616.375kHz

H 278.187kHz

J 284.093kHz

K 292.046kHz

L 210 1.023kHz

M 211 511.7Hz

N 212 255.8Hz

P 213 127.9Hz

Q 214 63.96Hz

R 215 31.98Hz

S 216 16Hz

T 217 8Hz

U 218 4Hz

W 219 2Hz

X 220 1Hz

Y 221 0.5Hz

Z 222 0.25Hz

Package Information

For the latest package outline information and land patterns

(footprints), 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.

Branding Information

The package branding includes a0 and a1 on the top of

the package next to or below 1099.

Ordering Information (continued) Chip Topology

SUBSTRATE CONNECTED TO Ground

DS1099 Low-Frequency Dual EconOscillator

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REVISION

NUMBER

REVISION

DATE DESCRIPTION PAGES

CHANGED

1 9/07 — 1, 2, 3, 5, 6

2 5/15 Remove automotive reference from data sheet 1

Revision History

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 and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.

DS1099 Low-Frequency Dual EconOscillator

│

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.

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