MK3233-01S [ICSI]

Handheld System Clock Synthesizer; 手持系统时钟合成器


型号：	MK3233-01S
厂家：	INTEGRATED CIRCUIT SOLUTION INC
描述：	Handheld System Clock Synthesizer 手持系统时钟合成器时钟
文件：	总4页 (文件大小：72K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

MK3233

Handheld System Clock Synthesizer

_{ICR O}C_{LOC K}

Description

Features

• Input crystal frequency of 32.768 kHz

• Lowest power solution available

The MK3233 is the smallest size, lowest power system

clock synthesizer available. It is the ideal way to

generate clocks for smart cell phones, PDAs, and other

devices where low power is required. Using analog

Phase-Locked Loop (PLL) techniques, the device

operates from a single 32.768 kHz crystal to produce

the 32.768 kHz, CPU, and serial communications

output clocks.

• Operating temperature of -20 to 70 °C

• Output clock frequencies up to 50 MHz

• Three output clocks

• 3.3 V or 5.0 V operation

The device has multiple power down modes for the

CPU, communications, and 32.768 kHz clocks.

• Duty cycle of 45/55

• Eight selectable CPU frequencies

• CPU or Communication clock power down

• Separate battery supply pin for 32 kHz runs to 2V

• IDD less than 4µA when 32 kHz running

• Serial port clocks of 1.8432 MHz (-01 version) or

3.6864 MHz (-02 version)

The MK3233 can save board space and cost even if it

only replaces the 32 kHz oscillator circuitry and one

additional surface mount crystal or oscillator. The

extremely low IDD, the ease of surface mounting, the

upgradeability of CPU frequencies, and the power

down capability are added benefits in using the part.

• Packaged in 16 pin narrow SOIC

Block Diagram

VDD GND

CPUS0

CPUS1

CPUS2

CPU

Output

Buffer

Clock Synthesis

and Control

Circuitry

CPUCLK

PDCPU

PDCOMM

Communications

Clock Synthesis

and Control

Output

Buffer

1.843 or

3.686 MHz

VDD32

Circuitry

32.768 kHz

crystal

Crystal

Oscillator

clock

Output

Buffer

32.768 kHz

MDS 3233 F

Revision 11070

Printed 11/16/00

Integrated Circuit Systems, Inc.• 525 Race Street• San Jose • CA • 95126• (408) 295-9800 tel • www.icst.com

MK3233

Handheld System Clock Synthesizer

_{ICR O}C_{LOC K}

Pin Assignment

CPU Clock Decoding

CPUS2 CPUS1 CPUS0 CPUCLK (MHz)

CPUS2

16 CPUS1

8.00

CPUS0

13.00

16.00

20.00

40.00

25.00

50.00

33.33

CPUCLK

VDD32

VDD

GND

VDD

GND

COMMCLK

32K

PDCPU

Frequency transitions will occur smoothly.

PDCOMM

Pin Descriptions

Number

Name

CPUS2

Type Description

Select 2 for CPUCLK frequencies. See Table above.

Crystal connection. Connect to 32.768 kHz crystal.

Separate power supply connection for 32.768 kHz clock. Will operate to 2.0 V.

Connect to +3.3 V or +5 V. Must be the same voltage as pin 13.

Connect to ground.

VDD32

VDD

GND

COMMCLK

32K

Serial communications (1.84 on -01 version, or 3.68MHz on -02 version) clock output.

32.768 kHz square wave clock output.

PDCOMM

PDCPU

Power Down serial Communications clock output (stops low) when low.

Power Down CPU clock output (stops low) when low.

Powers Down everything but 32 kHz oscillator internally. 32 kHz output buffer is off.

Connect to ground.

GND

VDD

Connect to +3.3 V or +5 V. Must be the same voltage as pin 5.

CPUCLK output. See Table above.

CPUCLK

CPUS0

CPUS1

Select 0 for CPUCLK frequencies. See Table above.

Select 1 for CPUCLK frequencies. See Table above.

Type: I = Input, O = output, P = power supply connection

Power Down status: Output clocks will stop in a low state when powered down

External Components

The MK3233 requires a minimum number of external components for proper operation. Decoupling

capacitors of 0.1µF should be connected between VDD and GND, and VDD32 and GND, as close to the

MK3233 as possible. A series resistor should be used on the VDD32 supply. A series termination resistor of

33Wmay be used for each clock output, except the 32.768 kHz. For tuning the real time clock output, use

a 32.768 kHz crystal with a load capacitance of 12.5pF, and connect a 20pF±5% (NPO dielectric)

capacitor between each crystal pin and ground. The 32.768 kHz crystal must be connected as close to the

chip as possible. Consult MicroClock for a recommended external circuit schematic.

MDS 3233 F

Revision 11070

Printed 11/16/00

Integrated Circuit Systems, Inc.• 525 Race Street• San Jose • CA • 95126• (408) 295-9800 tel • www.icst.com

MK3233

Handheld System Clock Synthesizer

_{ICR O}C_{LOC K}

Electrical Specifications

Parameter

Conditions

Minimum

Typical

Maximum

Units

ABSOLUTE MAXIMUM RATINGS (note 1)

Supply Voltage, VDD

Referenced to GND

VDD+0.5

Inputs and Clock Outputs

Ambient Operating Temperature

Soldering Temperature

Storage Temperature

Referenced to GND

Max of 10 seconds

-0.5

-20

°C

260

-65

150

DC CHARACTERISTICS (at 5.0 V unless otherwise noted)

Operating Voltage, VDD

3.0

2.0

5.5

Operating Voltage, VDD32

Input High Voltage, VIH

VDD=5 V

Input Low Voltage, VIL

VDD=5 V

0.8

0.4

Output High Voltage, VOH

Output Low Voltage, VOL

Input High Voltage, VIH

VDD=5 V, IOH=-25mA

VDD=5 V, IOL=25mA

VDD=3.3 V

2.4

1.9

2.4

Input Low Voltage, VIL

VDD=3.3 V

Output High Voltage, VOH

Output Low Voltage, VOL

IDD Operating Supply Current, 5 V

IDD32 with only 32 kHz running, 5 V

IDD Operating Supply Current, 3.3 V

VDD=3.3 V, IOH=-8mA

VDD=3.3 V, IOL=8mA

No Load, 50MHz

No Load

3.5

6.5

2.5

µA

No Load, 50MHz

IDD32 with only 32 kHz output running, 3.3 V No Load

IDD32, only 32 kHz osc. running, 3.3 V, note 2 32kHz output off. PD=0

Short Circuit Current, 5 V

Input Capacitance

32 kHz output

CPU output

±30

±100

AC CHARACTERISTICS (at 5.0 V unless otherwise noted)

Input Frequency

32.768

kHz

Output Clock Rise and Fall Time, 0.2 to 0.8VDD

Output Clock Duty Cycle, all MHz clocks

32.768 kHz Clock Duty Cycle

At VDD/2

49 to 51

At VDD32/2

20 to 50 MHz

Absolute Clock Period Jitter, CPU clock

-500

500

Power up time, CPU off to 50 MHz, 32k running VDD=3.3 or 5 V

Transition time, 8 MHz to 50 MHz

VDD=3.3 or 5 V

Transition time, 50 MHz to 8 MHz

2.5

500

Power on time,VDD32=0 V to all clocks stable

Power on time, all power down pins taken high

32.768kHz crystal with ESR £25kW

1000

32.768kHz oscillator running

Note 1: Stresses beyond those listed under Absolute Maximum Ratings could cause permanent damage to the device. Prolonged

exposure to levels above the operating limits but below the Absolute Maximums may affect device reliability.

Note 2: When PD=0 (low) and VDD32 is greater than 2.0V, then the 32kHz oscillator will continue to run on the chip, but the

output is turned off. This allows for a quick power-up (<20ms), while the chip is only consuming approximately 1µA.

MDS 3233 F

Revision 11070

Printed 11/16/00

Integrated Circuit Systems, Inc.• 525 Race Street• San Jose • CA • 95126• (408) 295-9800 tel • www.icst.com

MK3233

Handheld System Clock Synthesizer

_{ICR O}C_{LOC K}

Package Outline and Package Dimensions

(For current dimensional specifications, see JEDEC Publication No. 95.)

16 pin SOIC narrow

Inches

Min

Millimeters

Symbol

Max

Min

1.35

0.10

0.33

0.19

9.80

3.80

1.27 BSC

5.80

0.25

0.41

Max

0.0532 0.0688

0.0040 0.0098

0.0130 0.0200

0.0075 0.0098

0.3859 0.3937

0.1497 0.1574

.050 BSC

1.75

0.24

0.51

0.24

10.00

4.00

INDEX

AREA

0.2284 0.2440

0.0099 0.0195

0.0160 0.0500

6.20

0.50

1.27

h x 45°

Ordering Information

Part/Order Number

Marking

Communications Clock

Package

Temperature

MK3233-01S

MK3233-02S

MK3233-01S

MK3233-02S

MK3233-01S

MK3233-02S

1.843 MHz

3.686 MHz

1.843 MHz

3.686 MHz

16 pin SOIC

-20 to 70 °C

MK3233-01STR

MK3233-02STR

Add Tape & Reel -20 to 70 °C

While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems, Incorporated (ICS) assumes no responsibility for either its

use or for the infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is

intended for use in normal commercial applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary

environmental requirements are not recommended without additional processing by ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does

not authorize or warrant any ICS product for use in life support devices or critical medical instruments.

MDS 3233 F

Revision 11070

Printed 11/16/00

Integrated Circuit Systems, Inc.• 525 Race Street• San Jose • CA • 95126• (408) 295-9800 tel • www.icst.com

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