General Description
The MAX6730–MAX6735 single-/dual-/triple-voltage microprocessor (µP) supervisors feature a watchdog timer and manual ret capability. The MAX6730–MAX6735 offer factory-t ret thresholds for monitor-ing voltages from +0.9V to +5V and an adjustable ret input for monitoring voltages down to +0.63V. The com-bination of the features significantly improves system reliability and accuracy when compared to parate ICs or discrete components.
The active-low ret output asrts and remains asrted for the ret timeout period after all the monitored volt-ages exceed their respective thresholds. Multiple factory-t ret threshold combinations reduce the number of external components required. The MAX6730/MAX6731monitor a single fixed voltage, the MAX6732/MAX6733monitor two fixed voltages, and the MAX6734/MAX6735monitor two fixed voltages and one adjustable voltage. All devices are offered with six minimum ret timeout peri-ods ranging from 1.1ms to 1120ms.
The MAX6730–MAX6735 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 ret asrts allows system initialization during power-up. The watch-dog operates in norm
al mode with a 1.68s delay after initialization. The MAX6730/MAX6732/MAX6734 provide an active-low, open-drain watchdog output. The MAX6731/MAX6733/MAX6735 provide an active-low,push-pull watchdog output.
Other features include a manual ret input (MAX6730/MAX6731/MAX6734/MAX6735) and push-pull ret out-put (MAX6731/MAX6733/MAX6735) or open-drain ret output (MAX6730/MAX6732/MAX6734). The MAX6730–MAX6733 are offered in a tiny SOT23-6 package. The MAX6734/MAX6735 are offered in a space-saving SOT23-8 package. All devices are fully specified over the extended temperature range (-40°C to +85°C).
Applications
Multivoltage Systems
Telecom/Networking Equipment Computers/Servers
Portable/Battery-Operated Equipment Industrial Equipment Printer/Fax Set-Top Boxes
Features
o V CC 1 (Primary Supply) Ret Threshold Voltages from +1.575V to +4.63V o V CC 2 (Secondary Supply) Ret Threshold Voltages from +0.79V to +3.08V o Adjustable RSTIN Threshold for Monitoring
Voltages Down to +0.63V (MAX6734/MAX6735 Only)o Six Ret Timeout Options
o Watchdog Timer with Independent Watchdog Output
35s (min) Initial Watchdog Startup Period
1.12s (min) Normal Watchdog Timeout Period o Manual Ret Input
(MAX6730/MAX6731/MAX6734/MAX6735)o Guaranteed Ret Valid down to V CC 1 or V CC 2 = +0.8V
o Push-Pull RESET or Open-Drain RESET Output o Immune to Short V CC Transients o Low Supply Current: 14µA (typ) at +3.6V o Small 6-Pin and 8-Pin SOT23 Packages
MAX6730–MAX6735
Single-/Dual-/Triple-Voltage µP Supervisory Circuits with Independent Watchdog Output
________________________________________________________________Maxim Integrated Products
1
Ordering Information
19-2629; Rev 2; 1/03
For pricing, delivery, and ordering information,plea contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at
*Note:Inrt the threshold level suffixes for V CC 1 and V CC 2
(Table 1) after “UT” or “KA.” For the MAX6730/MAX6731, inrt only the V CC 1 threshold suffix after the “UT.” Inrt the ret timeout delay (Table 2) after “D” to complete the part number.For example, the MAX6732UTLTD3-T provides a V CC 1 threshold of +4.625V, a V CC 2 threshold of +3.075V, and a 210ms ret timeout period. Sample stock is generally held on standard ver-sions only (e the Standard Versions table). Standard versions have an order increment requirement of 2500 pieces.
Nonstandard versions have an order increment requirement of 10,000 pieces. Contact factory for availability.
猪蹄子怎么做好吃Typical Operating Circuit and Pin Configurations appear at end of data sheet.
M A X 6730–M A X 6735
Single-/Dual-/Triple-Voltage µP Supervisory Circuits with Independent Watchdog Output 2_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V CC 1 = V CC 2 = +0.8V to +5.5V, T A = -40°C to +85°C, unless otherwi noted. Typical values are at T A = +25°C.) (Note 1)
Stress beyond tho listed under “Absolute Maximum Ratings” may cau permanent damage to the device. The are stress ratings only, and functional operation of the device at the or any other conditions beyond tho indicated in the operational ctions of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
V CC 1, V CC 2, RSTIN, MR , WDI -0.3V to +6V RST , WDO to GND (open drain)...............................-0.3V to +6V RST , WDO to GND (push-pull).................-0.3V to (V CC 1 + 0.3V)Input Current/Output Current (all pins)...............................20mA Continuous Power Dissipation (T A = +70°C)
6-Pin SOT23-6 (derate 8.7mW/°C above +70°C)........696mW 8-Pin SOT23-8 (derate 8.9mW/°C above +70°C)........714mW
Operating Temperature Range ...........................-40°C to +85°C Storage -65°C to +150°C +150°C Lead Temperature (soldering, 10s).................................+300°C
MAX6730–MAX6735
Single-/Dual-/Triple-Voltage µP Supervisory Circuits with Independent Watchdog Output
_______________________________________________________________________________________3
ELECTRICAL CHARACTERISTICS (continued)
(V CC 1 = V CC 2 = +0.8V to +5.5V, T A = -40°C to +85°C, unless otherwi noted. Typical values are at T A = +25°C.) (Note 1)
M A X 6730–M A X 6735
Single-/Dual-/Triple-Voltage µP Supervisory Circuits with Independent Watchdog Output 4_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V CC 1 = V CC 2 = +0.8V to +5.5V, T A = -40°C to +85°C, unless otherwi noted. Typical values are at T A = +25°C.) (Note 1)
Note 1:Devices tested at T A = +25°C. Overtemperature limits are guaranteed by design and not production tested.
Note 2:Parameter guaranteed by design.
MAX6730–MAX6735
Single-/Dual-/Triple-Voltage µP Supervisory Circuits with Independent Watchdog Output
_______________________________________________________________________________________5
042108616141218-40
10
-15
35
60
85SUPPLY CURRENT vs. TEMPERATURE
(V CC 1 = +5V, V CC 2 = +3.3V)
TEMPERATURE (°C)S U P P L Y C U R R E N T (µA )
42108616141218-4010-15356085SUPPLY CURRENT vs. TEMPERATURE
(V CC 1 = +3.3V, V CC 2 = +2.5V)
TEMPERATURE (°C)S U P P L Y C U R R E N T (µA )
42108616141218
-4010-15356085
SUPPLY CURRENT vs. TEMPERATURE
(V CC 1 = +2.5V, V CC
2 = +1.8V)
TEMPERATURE (°C)
S U P P L Y C U R R E N T (µA )
042108616141218-40
10
-15
35
60
85SUPPLY CURRENT vs. TEMPERATURE
(V CC 1 = +1.8V, V CC
2 = +1.2V)
TEMPERATURE (°C)S U P P L Y C U R R E N T (µA )
NORMALIZED THRESHOLD VOLTAGE
vs. TEMPERATURE
佛教圣地五台山
M A X 6730-35 t o c 05
TEMPERATURE (°C)
N O R M A L I Z E D T H R E S H O L D V O L T A G E 603510-150.9920.9940.9960.9981.0001.0021.0041.0061.0081.010
0.990
-4085
Typical Operating Characteristics
(V CC 1 = +5V, V CC 2 = +3.3V, T A = +25°C, unless otherwi noted.)
M A X 6730–M A X 6735
Single-/Dual-/Triple-Voltage µP Supervisory Circuits with Independent Watchdog Output 6_______________________________________________________________________________________
Typical Operating Characteristics (continued)
当兵怎么报名
(V CC 1 = +5V, V CC 2 = +3.3V, T A = +25°C, unless otherwi noted.)
12141618202224262830
10
RSTIN TO RESET OUTPUT DELAY
vs. TEMPERATURE
M A X 6730-35 t o c 10
TEMPERATURE (°C)
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R S T I N T O R E S E T O U T P U T D E L A Y (µs )
6035-1510-4585
MAXIMUM V CC_ TRANSIENT DURATION vs. RESET THRESHOLD OVERDRIVE
RESET THRESHOLD OVERDRIVE (mV)
甘愿造句M A X I M U M V C C _ T R A N S I E N T D U R A T I O N (µs )
10
100
安全保卫工作总结
100
1000
10,000
10
1
1000
MR TO RESET OUTPUT DELAY
MAX6730-35 toc08
40ns/div
攫的读音MR 2V/div
RST 2V/div
V CC_ TO RESET OUTPUT DELAY vs. TEMPERATURE (100mV OVERDRIVE)
M A X 6730-35 t o c 09
TEMPERATURE (°C)V C C _ T O R E S E T O U T P U T D E L A Y (µs )
发朋友圈句子60
35
-15
10
455055606570758040-45
85NORMALIZED TIMEOUT PERIOD
vs. TEMPERATURE
M A X 6730-35 t o c 06
TEMPERATURE (°C)
N O R M A L I Z E D T I M E O U T P E R I O D 60
35
10
-15
0.99951.00001.00051.00101.00151.00201.00251.00301.00351.00400.9990
-
40
85
