MAX7378

Features:

`2.7V to 5.5V Operation
`Accurate High-Speed Oscillator: 600kHz to 10MHz
`Accurate Low-Speed 32kHz Oscillator
`Glitch-Free Switch Between High Speed and Low Speed at Any Time
`Reset Output Holds the C in Reset for 100s After Clock Startup
` ±10mA Clock-Output Drive Capability
`2% Initial Accuracy
`±50ppm/°C Temperature Coefficient
`50% ±7% Output Duty Cycle
` 5ns Output Rise and Fall Time
`Low Jitter: 160ps (Peak-to-Peak) at 8MHz
`2.4mA Fast-Mode Operating Current (8MHz)
`11A Slow-Mode Operating Current (32kHz)
`-40°C to +125°C Temperature Range


Application

`White Goods
`Automotive
`Consumer Products
`Appliances and Controls
`Handheld Products
`Portable Equipment
`Microcontroller (C) Systems


Specifications

VCC to GND ...................................................................-0.3V to +6V
All Other Pins to GND .......................................-0.3V to (VCC + 0.3V)
CLOCK Current ......................................................................±10mA
Continuous Power Dissipation (T_A = +70°C)
8-Pin MAX (derate 4.5mW/°C above +70°C)...........362mW (U8-1)
Operating Temperature Range .............................-40°C to +135°C
Junction Temperature ...........................................................+150°C
Storage Temperature Range.................................-60°C to +150°C
Lead Temperature (soldering, 10s).......................................+300°C

Description

The MAX7378 dual-speed silicon oscillator with reset, is a replacement for ceramic resonators, crystals, crystaloscillator modules, and discrete reset circuits. The MAX7378 provides the primary and secondary clock source and reset function for microcontrollers in 3V, 3.3V, and 5V applications. The MAX7378 features a factory-programmed high-speed oscillator, a 32.768kHz oscillator, a clock selector input, and a microprocessor (P) power-on-reset (POR) supervisor. The clock output of MAX7378 can be switched at any time between the high-speed clock and the 32.768kHz clock for lowpower operation. Switchover is synchronized internally to provide glitch-free clock switching.

Unlike typical crystal and ceramic resonator oscillator circuits, the MAX7378 is resistant to vibration and EMI. The high-output-drive current and absence of highimpedance nodes make the oscillator less susceptible to dirty or humid operating conditions. With a wide operating temperature range as standard, the MAX7378 is a good choice for demanding home appliance, industrial, and automotive environments.

The MAX7378 is available in an 8-pin MAX® package. Refer to the MAX7384 data sheet for frequencies 10MHz. The MAX7378 standard operating temperature range is -40°C to +125°C. See the Applications Information section for the extended operating temperature range.