General Description

The MAX7377 dual-speed silicon oscillator with reset is

a replacement for ceramic resonators, crystals, crystal

oscillator modules, and discrete reset circuits. The device

provides the primary and secondary clock source for

microcontrollers in 3V, 3.3V, and 5V applications. The

MAX7377 features a factory-programmed high-speed

oscillator, a 32.768kHz oscillator, and a clock selec-

tor input. The clock output can be switched at any time

between the high-speed clock and the 32.768kHz clock

for low-power operation. Switchover is synchronized inter-

nally to provide glitch-free clock switching.

Unlike typical crystal and ceramic resonator oscillator

circuits, the MAX7377 is resistant to vibration and EMI.

The high-output-drive current and absence of high-

impedance nodes make the oscillator less susceptible to

dirty or humid operating conditions. With a wide operating

temperature range as standard, the MAX7377 is a good

choice for demanding home appliance and industrial

environments.

The MAX7377 is available in factory-programmed fre-

quencies from 32.768kHz to 10MHz. See Table 1 for

standard frequencies and contact the factory for custom

frequencies.

The MAX7377 is available in a 5-pin SOT23 package.

Refer to the MAX7383 data sheet for frequencies ≥10MHz.

The MAX7377 standard operating temperature range is

-40°C to +125°C. See the Applications Information sec-

tion for the extended operating temperature range.

Applications

● White Goods

● Consumer Products

● Appliances and Controls

● Handheld Products

● Portable Equipment

● Microcontroller Systems

Features

● 2.7V to 5.5V Operation

● Accurate High-Speed 600kHz to 10MHz Oscillator

● Accurate Low-Speed 32kHz Oscillator

● Glitch-Free Switch Between High Speed and Low

Speed at Any Time

● ±10mA Clock-Output Drive Capability

● 2% Initial Accuracy

● ±50ppm/°C Temperature Coefficient

● 50% Duty Cycle

● 5ns Output Rise and Fall Time

● Low Jitter: 160ps(P-P) at 8MHz (No PLL)

● 3mA Fast-Mode Operating Current (8MHz)

● 13μA Slow-Mode Operating Current (32kHz)

● -40°C to +125°C Temperature Range

Typical Application Circuit appears at end of data sheet.

19-3474; Rev 4; 1/21

The first two letters are AX. See Table 1 at the end of the data

sheet for the two-letter code.

PART

TEMP RANGE

PIN-

PACKAGE

PKG

CODE

MAX7377AX_ _-T

-40°C to +125°C 5 SOT23-5

U5-2

GND

VCC

SPEED

1

5 E.C.

CLOCK

SOT23

TOP VIEW

2

3

4

MAX7377

Silicon Oscillator with Low-Power

Frequency Switching

MAX7377

Evaluation Kit

Available

Design

Resources

Tools

and Models

Support

One Analog Way, Wilmington, MA 01887 U.S.A. |

Tel: 781.329.4700

|

© 2021 Analog Devices, Inc. All rights reserved.

© 2021 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners.

Click here to ask an associate for production status of specific part numbers.

Pin Configuration

Ordering Information