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參數資料
| 型號： | MAX6730A |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 單/雙/三電壓微處理器監(jiān)控電路，帶有獨立的看門狗輸出 |
| 中文描述： | 單/雙/三電壓微處理器監(jiān)控電路，帶有獨立的看門狗輸出 |
| 文件頁數： | 1/16頁 |
| 文件大小： | 460K |
| 代理商： | MAX6730A |
General Description
The MAX6730A–MAX6735A single-/dual-/triple-voltage
microprocessor (P) supervisors feature a watchdog
timer and manual reset capability. The MAX6730A–
MAX6735A offer factory-set reset thresholds for moni-
toring voltages from +0.9V to +5V and an adjustable
reset input for monitoring voltages down to +0.63V. The
combination of these features significantly improves
system reliability and accuracy when compared to sep-
arate ICs or discrete components.
The active-low reset output asserts and remains asserted
for the reset timeout period after all the monitored volt-
ages exceed their respective thresholds. Multiple factory-
set reset threshold combinations reduce the number of
external components required. The MAX6730A/
MAX6731A monitor a single fixed voltage, the MAX6732A/
MAX6733A monitor two fixed voltages, and the
MAX6734A/MAX6735A monitor two fixed voltages and one
adjustable voltage. All devices are offered with six mini-
mum reset timeout periods ranging from 1.1ms to 1120ms.
The MAX6730A–MAX6735A feature a watchdog timer
with an independent watchdog output. The watchdog
timer prevents system lockup during code execution
errors. A watchdog startup delay of 54s after reset
asserts allows system initialization during power-up.
The watchdog operates in normal mode with a 1.68s
delay after initialization. The MAX6730A/MAX6732A/
MAX6734A provide an active-low, open-drain watch-
dog output. The MAX6731A/MAX6733A/MAX6735A
provide an active-low, push-pull watchdog output.
Other features include a manual reset input (MAX6730A/
MAX6731A/MAX6734A/MAX6735A) and push-pull reset
output (MAX6731A/MAX6733A/MAX6735A) or open-
drain reset output (MAX6730A/MAX6732A/MAX6734A).
The MAX6730A–MAX6733A are offered in a tiny 6-pin
SOT23 package. The MAX6734A/MAX6735A are offered
in an 8-pin, space-saving SOT23 package. All devices
are fully specified over the extended -40°C to +125°C
temperature range.
Applications
Multivoltage Systems
Telecom/Networking Equipment
Computers/Servers
Portable/Battery-Operated Equipment
Industrial Equipment
Printer/Fax
Set-Top Boxes
Features
VCC1 (Primary Supply) Reset Threshold Voltages
from +1.575V to +4.63V
VCC2 (Secondary Supply) Reset Threshold
Voltages from +0.79V to +3.08V
Adjustable RSTIN Threshold for Monitoring Voltages
Down to +0.63V (MAX6734A/MAX6735A Only)
Six Reset Timeout Options
Watchdog Timer with Independent Watchdog Output
35s (min) Initial Watchdog Startup Period
1.12s (min) Normal Watchdog Timeout Period
Manual Reset Input (MAX6730A/MAX6731A/
MAX6734A/MAX6735A)
Guaranteed Reset Valid down to
VCC1 or VCC2 = +0.8V
Push-Pull RESET or Open-Drain RESET Output
Immune to Short VCC Transients
Low Supply Current: 14A (typ) at +3.6V
Small 6-Pin and 8-Pin SOT23 Packages
MAX6730A–MAX6735A
Single-/Dual-/Triple-Voltage P Supervisory
Circuits with Independent Watchdog Output
________________________________________________________________ Maxim Integrated Products
1
Ordering Information
19-0605; Rev 0; 8/06
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.
All devices specified over the -40°C to +125°C operating tem-
perature range.
PART*
PIN-PACKAGE
PKG CODE
MAX6730AUT_D_ -T
6 SOT23-6
U6-1
MAX6731AUT_D_ -T
6 SOT23-6
U6-1
MAX6732AUT_ _D_ -T
6 SOT23-6
U6-1
MAX6733AUT_ _D_ -T
6 SOT23-6
U6-1
MAX6734AKA_ _D_ -T
8 SOT23-8
K8S-3
MAX6735AKA_ _D_ -T
8 SOT23-8
K8S-3
Typical Operating Circuit and Pin Configurations appear at
end of data sheet.
*Note: Insert the threshold level suffixes for VCC1 and VCC2
(Table 1) after “UT” or “KA.” For the MAX6730A/MAX6731A,
insert only the VCC1 threshold suffix after the “UT.” Insert the
reset timeout delay (Table 2) after “D” to complete the part num-
ber. For example, the MAX6732AUTLTD3-T provides a VCC1
threshold of +4.625V, a VCC2 threshold of +3.075V, and a
210ms reset timeout period. Sample stock is generally held on
standard versions only (see the Standard Versions table).
Standard versions have an order increment requirement of 2500
pieces. Nonstandard versions have an order increment require-
ment of 10,000 pieces. Contact factory for availability.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “T” with “+T” when ordering.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX6730AUTLD1+T | 功能描述:監(jiān)控電路 Single uPower Supervisor RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數: 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6730AUTLD2+T | 功能描述:監(jiān)控電路 Single uPower Supervisor RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數: 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6730AUTLD3+ | 制造商:Maxim Integrated Products 功能描述:VOLT SUPERVISOR PWR SUPPLY 4.625V 6PIN SOT-23 - Cut Tape Product |
| MAX6730AUTLD3+T | 功能描述:監(jiān)控電路 Single uPower Supervisor RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數: 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6730AUTLD4+T | 功能描述:監(jiān)控電路 Single-/Dual-/Triple-Voltage N
|
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