MAX7390

更新时间： 2024-11-08 11:14:55

品牌	Logo	应用领域
美信 - MAXIM		时钟发生器
页数	文件大小	规格书
10页	274K
描述
Speed-Switching Clock Generator with Power Fail

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数据手册

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MAX7390 数据手册

19-3981; Rev 0; 1/06

Speed-Switching Clock Generator

with Power Fail

General Description

The MAX7391 replaces ceramic resonators, crystals,

and supervisory functions for microcontrollers in 3.3V

and 5V applications.

Features

♦ Robust Microcontroller Clock and Supervisory

Functions in a Single Package

♦ Integrated Reset and Power-Fail Functions

♦ Speed Select

The MAX7391 provides a clock source, reset, and

power-fail functions. The programmable power-fail func-

tion provides early warning of power failure and is con-

♦ +2.7V to +5.5V Operation

figurable to detect either an external voltage or the V

supply to the device.

♦ Factory-Trimmed Oscillator

♦ Reset Valid Down to 1.1V Supply Voltage

♦ ±1ꢀmꢁ Clock-Output Drive Current

♦ ±±4 Total ꢁccuracy ꢂor -±ꢀ0C to +1250C

The clock output can be switched between normal and

half-speed operation. This functionality allows the micro-

controller to operate at reduced power and may be

used to extend the time available to perform house-

keeping tasks, such as writing data to flash during a

power failure. Connecting the power-fail output to the

SPEED input reduces clock speed automatically during

power-fail events.

♦ ±2.754 Total ꢁccurac ꢂor ꢀ0C to +ꢃ50C

♦ 5.5mꢁ Operating Current (12MHz Version)

♦ -±ꢀ0C to +1250C Temperature Range

♦ Surꢂace-Mount Package

The MAX7391 clock output is factory programmed to a

frequency in the 1MHz to 16MHz range. Four standard

frequencies are available. Other frequencies are avail-

able upon request. The maximum operating supply cur-

rent is 5.5mA (typ) with a clock frequency of 12MHz.

♦ 1MHz to 16MHz Factory Preset Frequency Range

Unlike typical crystal and ceramic resonator oscillator

circuits, the MAX7391 is resistant to EMI and vibration,

and operates 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.

Ordering Information

PKG

CODE

PꢁRT

TEMP RꢁNGE

PIN-PꢁCKꢁGE

MAX7391srff -40°C to +125°C 8 µMAX

U8-1

The MAX7391 is available in an 8-pin µMAX^®package.

The MAX7391 standard operating temperature range is

from -40°C to +125°C.

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

symbol found in Table 2 in the place of “s.” “r” is a placeholder

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

Table 1 in the place of “r.” “ff” is a placeholder for the nominal

output frequency. Insert the symbol found in Table 3 in the

place of “ff.” For example, MAX7391CMTP describes a device

with 4.38V reset level, open-collector RST output, and a clock

output frequency of 8MHz.

Applications

White Goods

Automotive

Appliances and Controls

Handheld Products

Portable Equipment

Microcontroller Systems

Pin Configuration

TOP VIEW

PFI

CLOCK

RST/RST

SPEED

PFO

MAX7391

Typical Application Circuit, Functional Diagram, and Selector

Guide appear at end of data sheet.

N.C.

GND

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

µMꢁX

________________________________________________________________ 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.

12 3 4 5 6 7...10

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与MAX7390相关器件

型号	品牌	获取价格	描述	数据表
MAX7390AQRD	MAXIM	获取价格	Power Supply Management Circuit, Adjustable, 1 Channel, BICMOS, PDSO8, MO-187CAA, UMAX-8
MAX7390ASVB	MAXIM	获取价格	Power Supply Management Circuit, Adjustable, 1 Channel, BICMOS, PDSO8, MO-187CAA, UMAX-8
MAX7390AXTP	MAXIM	获取价格	Power Supply Management Circuit, Adjustable, 1 Channel, BICMOS, PDSO8, MO-187CAA, UMAX-8
MAX7390BMVB	MAXIM	获取价格	Power Supply Management Circuit, Adjustable, 1 Channel, BICMOS, PDSO8, MO-187CAA, UMAX-8
MAX7390CMAC	MAXIM	获取价格	Power Supply Management Circuit, Adjustable, 1 Channel, BICMOS
MAX7390CMVB-T	MAXIM	获取价格	Power Supply Management Circuit, Adjustable, 1 Channel, BICMOS, PDSO8, MO-187CAA, UMAX-8
MAX7390CSAC	MAXIM	获取价格	Power Supply Management Circuit, Adjustable, 1 Channel, BICMOS
MAX7390CSRD	MAXIM	获取价格	Power Supply Management Circuit, Adjustable, 1 Channel, BICMOS, PDSO8, MO-187CAA, UMAX-8
MAX7390CSRD-T	MAXIM	获取价格	Power Supply Management Circuit, Adjustable, 1 Channel, BICMOS, PDSO8, MO-187CAA, UMAX-8
MAX7390CVVB	MAXIM	获取价格	暂无描述

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