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Data Sheet

FULL DATA SHEET (PDF, 296kB) Download   E-Mail

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 programmable and provides watchdog timeout values in the 16ms to 2048ms range. The MAX7389 provides a separate watchdog output that is used as a status indicator 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 perform housekeeping tasks, such as writing data to flash during a power failure. The MAX7389/MAX7390 clock outputs are factory programmed to a frequency in the 1MHz to 16MHz range. Four standard frequencies are available. Other frequencies 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, vibration, and operate reliably at high temperatures. 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.

Key Features		Applications/Uses
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) -40°C to +125°C Temperature Range 8-Pin µMAX Surface-Mount Package 1MHz to 16MHz Factory Preset Frequency		Appliances and Controls Automotive Handheld Products Microcontroller Systems Portable Equipment White Goods

Diagram

Typical Application Circuit

Application Notes

Application Note 3582: Replacing Crystals and Ceramic Resonators with Silicon Oscillators - MAX7389, MAX7390

Evaluation Kits

none

Design Guides

MICROPROCESSOR SUPERVISORY (PDF) SYSTEM TIMING & CONTROL (PDF)

Reliability Reports

Show FIT data for: MAX7389 MAX7390 Request Reliability Report for: MAX7389 MAX7390

Software/Models

none

Ordering Information
Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
Devices: 1-36 of 36
MAX7389	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX7389CMAC				-40°C to +125°C	See data sheet
MAX7389CSAC				-40°C to +125°C	See data sheet
MAX7389CSVB			uMAX;8 pin;16 mm² Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX7389CSWB-T				-40°C to +125°C	See data sheet
MAX7389CMRD			uMAX;8 pin;16 mm² Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX7389CMTP			uMAX;8 pin;16 mm² Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX7389CMVB			uMAX;8 pin;16 mm² Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX7389CMWB			uMAX;8 pin;16 mm² Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX7389CSRD-T				-40°C to +125°C	See data sheet
MAX7389CSVB-T				-40°C to +125°C	See data sheet
MAX7389CSTP-T				-40°C to +125°C	See data sheet
MAX7389CSTP			uMAX;8 pin;16 mm² Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX7389CSRD			uMAX;8 pin;16 mm² Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX7389CMWB-T				-40°C to +125°C	See data sheet
MAX7389CMVB-T				-40°C to +125°C	See data sheet
MAX7389CMTP-T				-40°C to +125°C	See data sheet
MAX7389CMRD-T				-40°C to +125°C	See data sheet
MAX7389CSWB			uMAX;8 pin;16 mm² Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX7390	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX7390CSAC				-40°C to +125°C	See data sheet
MAX7390CMAC				-40°C to +125°C	See data sheet
MAX7390CSWB			uMAX;8 pin;16 mm² Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX7390CSVB-T				-40°C to +125°C	See data sheet
MAX7390CSVB			uMAX;8 pin;16 mm² Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX7390CSTP-T				-40°C to +125°C	See data sheet
MAX7390CSTP			uMAX;8 pin;16 mm² Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX7390CSRD-T				-40°C to +125°C	See data sheet
MAX7390CSRD			uMAX;8 pin;16 mm² Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX7390CMRD			uMAX;8 pin;16 mm² Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX7390CMWB-T				-40°C to +125°C	See data sheet
MAX7390CMWB			uMAX;8 pin;16 mm² Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX7390CMVB-T				-40°C to +125°C	See data sheet
MAX7390CMVB			uMAX;8 pin;16 mm² Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX7390CMTP-T				-40°C to +125°C	See data sheet
MAX7390CMTP			uMAX;8 pin;16 mm² Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX7390CMRD-T				-40°C to +125°C	See data sheet
MAX7390CSWB-T				-40°C to +125°C	See data sheet

Related Products

MAX7391 Speed-Switching Clock Generator with Power Fail MAX7387, MAX7388 System Monitoring Oscillator with Watchdog and Power Fail MAX7389, MAX7390 Microcontroller Clock Generator with Watchdog

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