MAX7390CSWB-T datasheet, PDF - EEWORLD Datasheet

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MAX7390CSWB-T: DescriptionClock Generators u0026 Support Products; CategoryPower/power management The power supply circuit; File Size284KB，11 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html

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MAX7390CSWB-T Overview

Clock Generators u0026 Support Products

MAX7390CSWB-T Parametric

Parameter Name	Attribute value
Is it Rohs certified?	incompatible
Maker	Maxim
Parts packaging code	TSSOP
package instruction	TSSOP,
Contacts	8
Reach Compliance Code	compliant
ECCN code	EAR99
Adjustable threshold	YES
Analog Integrated Circuits - Other Types	POWER SUPPLY MANAGEMENT CIRCUIT
JESD-30 code	S-PDSO-G8
JESD-609 code	e0
length	3 mm
Humidity sensitivity level	1
Number of channels	1
Number of functions	1
Number of terminals	8
Maximum operating temperature	125 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	TSSOP
Package shape	SQUARE
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	240
Certification status	Not Qualified
Maximum seat height	1.1 mm
Maximum supply voltage (Vsup)	5.5 V
Minimum supply voltage (Vsup)	2.7 V
Nominal supply voltage (Vsup)	5 V
surface mount	YES
technology	BICMOS
Temperature level	AUTOMOTIVE
Terminal surface	TIN LEAD
Terminal form	GULL WING
Terminal pitch	0.65 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	30
width	3 mm

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19-3897; Rev 1; 2/06

Microcontroller Clock Generator with

Watchdog

General Description

The MAX7389/MAX7390 replace ceramic resonators,

crystals, and supervisory functions for microcontrollers

in 3.3V and 5V applications.

The MAX7389/MAX7390 provide a clock source, reset,

and watchdog functions. The watchdog timer is pin pro-

grammable and provides watchdog timeout values in

the 16ms to 2048ms range. The MAX7389 provides a

separate watchdog output that is used as a status indi-

cator or to control safety-critical system elements.

The MAX7390 features a clock-speed select that

reduces the output frequency by half. This functionality

allows the microcontroller to operate at reduced power

and may be used to extend the time available to per-

form housekeeping tasks, such as writing data to flash

during a power failure.

The MAX7389/MAX7390 clock outputs are factory pro-

grammed to a frequency in the 1MHz to 16MHz range.

Four standard frequencies are available. Other frequen-

cies are available upon request. The maximum operating

supply current is 5.5mA with a clock frequency of 12MHz.

Unlike typical crystal and ceramic resonator oscillator

circuits, the MAX7389/MAX7390 are resistant to EMI

and vibration, and operate reliably at high tempera-

tures. The high-output drive current and absence of

high-impedance nodes make the oscillator invulnerable

to dirty or humid operating conditions.

The MAX7389/MAX7390 are available in an 8-pin µMAX

package. The MAX7389/MAX7390 standard operating

temperature range is from -40°C to +125°C.

♦

Features

♦

Robust Microcontroller Clock and Supervisor in a

Single Package

Integrated Reset and Watchdog Functions

Pin-Programmable Watchdog Timeout

Speed Select

+2.7V to +5.5V Operation

Factory-Trimmed Oscillator

Reset Valid Down to 1.1V Supply Voltage

±10mA Clock-Output Drive Current

±4% Total Accuracy for -40°C to +125°C

±2.75% Total Accuracy for 0°C to +85°C

5.5mA Operating Current (12MHz Version)

MAX7389/MAX7390

♦

-40°C to +125°C Temperature Range

♦

8-Pin µMAX Surface-Mount Package

♦

1MHz to 16MHz Factory Preset Frequency

Ordering Information

PART

MAX7389srff

MAX7390srff

TEMP RANGE

-40

C to +125

-40 C to +125 C

PIN-

PACKAGE

8 µMAX

PKG

CODE

U8-1

Applications

White Goods

Automotive

Appliances and Controls

Handheld Products

Portable Equipment

Microcontroller Systems

Note:

“s” is a placeholder for the reset output type. Insert the

symbol found in Table 3 in the place of “s.” “r” is a placeholder

for the power-on reset (POR) voltage. Insert the symbol found in

Table 2 in the place of “r.” “ff” is a placeholder for the nominal

output frequency. Insert the symbol found in Table 4 in the

place of “ff.” For example, MAX7389CMTP describes a device

with 4.38V reset level, open-collector

RST

output, and a clock

output frequency of 8MHz.

Typical Application Circuit, Functional Diagram, and Selector

Guide appear at end of data sheet.

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

Pin Configurations

TOP VIEW

WDS1

WDS2

CLOCK

RST/RST

WDI

WDO

TOP VIEW

CLOCK

RST/RST

WDI

SPEED

MAX7389

GND 4

WDS1 2

MAX7390

WDS2

GND 4

µMAX

________________________________________________________________

Maxim Integrated Products

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.

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