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參數資料
型號: ADM13305-4ARZ-RL71
廠商: Analog Devices, Inc.
英文描述: Dual Processor Supervisors with Watchdog
中文描述: 雙處理器監控器,帶有看門狗
文件頁數: 1/12頁
文件大小: 214K
代理商: ADM13305-4ARZ-RL71
Dual Processor
Supervisors with Watchdog
ADM13305
FEATURES
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2007 Analog Devices, Inc. All rights reserved.
www.analog.com
Dual supervisory circuits
Supply voltage range of 2.7 V to 5.5 V
Pretrimmed threshold options: 1.8 V, 2.5 V, 3.3 V, and 5 V
Adjustable 0.6 V voltage reference
Maximum supply current of 40 μA
140 ms (minimum) reset timeout
Watchdog timer with 1.6 sec (typical) timeout
RESET valid from V
DD
≥ 1.1 V
Push-pull RESET and RESET outputs
8-lead, narrow body SOIC package
Temperature range: 40°C to +85°C
APPLICATIONS
Supervising DSPs/microcontrollers
Industrial and portable equipment
Wireless systems
Notebook/desktop computers
GENERAL DESCRIPTION
The ADM13305 is a dual voltage supervisor designed to
monitor two supplies and provide a reset signal to DSP and
microprocessor-based systems.
There are five models available, all of which feature a combination
of internally pretrimmed undervoltage threshold options for
monitoring 1.8 V, 2.5 V, 3.3 V, and 5 V supplies. There is also
an adjustable input option with an undervoltage threshold voltage
of 0.6 V
The ADM13305-18, ADM13305-25, and ADM13305-33 models
have two internally fixed thresholds. The ADM13305-4 and
ADM13305-5 offer one internally fixed threshold and one
externally programmable threshold via a resistor string. See
the Ordering Guide for a list of all available options.
During power-up, RESET is asserted when the supply voltage
exceeds 1.1 V. The device then monitors the SENSEv input pins
and holds the RESET output low as long as either of the SENSEv
inputs remains below the rising threshold voltage, V
IT+
.
Once the supplies monitored at the SENSEv inputs rise above
their associated thresholds, the reset signal remains low for
the reset timeout period before deasserting. Subsequently, if a
voltage monitored by the SENSEv pins falls below its associ-
ated falling threshold, V
IT
, the RESET output asserts. The
ADM13305 features both an active high RESET and an active
low RESET output.
FUNCTIONAL BLOCK DIAGRAMS
0
V
DD
14k
R1
R2
R3
R4
1.25V
RESET
LOGIC + TIMER
OSCILLATOR
TRANSITION
DETECTION
WATCHDOG
LOGIC + TIMER
RESET
ADM13305-33
ADM13305-25
ADM13305-18
SENSE1
SENSE2
GND
WDI
MR
RESET
Figure 1.
0
V
DD
14k
R1
R2
0.6V
RESET
LOGIC + TIMER
OSCILLATOR
TRANSITION
DETECTION
WATCHDOG
LOGIC + TIMER
RESET
ADM13305-4
ADM13305-5
SENSE1
SENSE2
WDI
MR
RESET
GND
Figure 2. .
As well as providing power-on reset signals, an on-chip watchdog
timer can reset the microprocessor if it fails to strobe within the
preset timeout period. A reset signal can also be asserted by an
external push button through the manual reset input pin.
The ADM13305 is available in an 8-lead, narrow body SOIC
package. The device operates over the extended industrial
temperature range of 40°C to +85°C.
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ADM13305-5ARZ 功能描述:IC SUPERVISR DUAL 2.5/ADJ 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 監控器 系列:- 其它有關文件:STM6717 View All Specifications 標準包裝:1 系列:- 類型:多壓監控器 監視電壓數目:2 輸出:開路漏極或開路集電極 復位:低有效 復位超時:最小為 600 ms 電壓 - 閥值:1.11V,3.075V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A,SOT-753 供應商設備封裝:SOT-23-5 包裝:Digi-Reel® 產品目錄頁面:1194 (CN2011-ZH PDF) 其它名稱:497-7019-6
ADM13305-5ARZ1 制造商:AD 制造商全稱:Analog Devices 功能描述:Dual Processor Supervisors with Watchdog
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