General Description
The MAX6736–MAX6745 are low-power dual-/triple-voltage microprocessor (µP) supervisors. The devices asrt a ret if any monitored supply falls below its factory-trimmed or adjustable threshold and maintain ret for a minimum timeout period after all supplies ri above their thresholds. The integrated dual/triple supervisory circuits significantly reduce size and power compared to parate ICs or discrete com-ponents. The low supply current of 6µA makes the devices ideal for portable equipment.
The MAX6736/MAX6737 are dual fixed-voltage µP supervisors with a manual ret input. The MAX6738/MAX6739 have one fixed and one adjustable ret threshold and a manual ret input. The MAX6740/MAX6743 are triple-voltage µP supervisors with two fixed and one ur-adjustable ret threshold inputs.The MAX6741/MAX6744 are dual-voltage µP supervi-sors with a power-OK (POK) output ideal for power-supply quencing. The MAX6742/MAX6745 monitor the primary V CC supply and have an independent power-fail comparator.
The MAX6736–MAX6745 monitor I/O supply voltages (V CC 1) from 1.8V to 5.0V and core supply voltages (V CC 2) from 0.9V to 3.3V with factory-trimmed ret threshold voltage options (Table 1). An external adjustable RSTIN input option allows monitoring volt-ages down to 0.5V.
A variety of push-pull or open-drain ret outputs along with manual ret input and power-fail input/output fea-tures are available (e the Selector Guide ). The MAX6736–MAX6745 are offered in a space-saving 5-pin SC70 package and operate over the -40°C to +85°C temperature range.
Applications
Features
o Dual-/Triple-Supply Ret Voltage Monitors o Precision Factory-Set Ret Thresholds for Monitoring from 0.9V to 5.0V
o Adjustable Ret Input Down to 0.488V
o 150ms and 1200ms (min) Ret Timeout Period Options
o V CC 1 Power-OK Output for Power-Supply
Sequencing Applications (MAX6741/MAX6744)o Power-Fail Input/Power-Fail Output (MAX6742/MAX6745)o 6µA Supply Current o Tiny SC70 Package
MAX6736–MAX6745
Low-Power Dual-/Triple-Voltage SC70 µP
Supervisory Circuits
________________________________________________________________Maxim Integrated Products
1
Selector Guide
职称英语真题Ordering Information
19-2531; Rev 1; 4/03
For pricing, delivery, and ordering information,plea contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at
Note:The first “_ _” or “_” are placeholders for the threshold voltage levels of the devices. Desired threshold levels are t by the part number suffix found in Tables 1 and 2. The “_” after the D is a placeholder for the ret timeout period suffix found in Table 3. For example, the MAX6736XKLTD3-T is a dual-volt-age supervisor V TH 1 = 4.625V, V TH 2 = 3.075V, and a 150ms minimum ret timeout period. All devices are available in tape-and-reel only. There is a 2500-piece minimum order
increment for standard versions (e Table 1). Sample stock is typically held on standard versions only. Nonstandard versions require a minimum order increment of 10,000 pieces. Contact factory for availability.
Portable/Battery-Powered Equipment Multivoltage Systems Notebook Computers
Controllers PDAs
GPS Equipment POS Equipment
Ordering Information continued at end of data sheet.Selector Guide continued at end of data sheet.Pin Configurations appear at end of data sheet.
Typical Application Circuits appear at end of data sheet.Functional Diagram appears at end of data sheet.
M A X 6736–M A X 6745
Low-Power Dual-/Triple-Voltage SC70 µP Supervisory Circuits 2_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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, POK1 -0.3V to +6V Open-Drain RESET , PFO -0.3V to +6V Push-Pull RESET -0.3V to (V CC 1 + 0.3V)MR , RSTIN, PFI -0.3V to (V CC 1 + 0.3V)Input/Output Current, 20mA Continuous Power Dissipation (T A = +70°C)
5-Pin SC70 (derate 3.1mW/°C above +70°C)..............247mW
Operating Temperature Range ...........................-40°C to +85°C +150°C Storage
.-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°C
MAX6736–MAX6745
Low-Power Dual-/Triple-Voltage SC70 µP
Supervisory Circuits
_______________________________________________________________________________________3
ELECTRICAL CHARACTERISTICS (continued)
M A X 6736–M A X 6745
Low-Power Dual-/Triple-Voltage SC70 µP Supervisory Circuits 4_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)mysterious的意思
MAX6736–MAX6745
Low-Power Dual-/Triple-Voltage SC70 µP
Supervisory Circuits
_______________________________________________________________________________________5
ELECTRICAL CHARACTERISTICS (continued)
(V CC = 1.2V to 5.5V, T A = -40°C to +85°C, unless otherwi noted. Typical values are at T A = +25°C.) (Note 1)
Note 3:t RD timeout period begins after POK1 timeout period (t POKP ) and V CC 2 ≥V TH 2 (max) (MAX6741/MAX6744).Note 4:Refers to the manual ret function obtained by forcing the RESET out
put low.Note 5:V CC 1 ≥1.6V.
Typical Operating Characteristics
(T A = +25°C, unless otherwi noted.)
SUPPLY CURRENT vs. TEMPERATURE
TEMPERATURE (°C)S U P P L Y C U R R E N T (µA
)
6040200-20123456789100-40
80SUPPLY CURRENT vs. TEMPERATURE
TEMPERATURE (°C)S U P P L Y C U R R E N T
(µA )
6040200-20123456789100
-4080
SUPPLY CURRENT vs. TEMPERATURE
TEMPERATURE (°C)
S U P P L Y C U R R E N T (µA )
60
40
20
-20
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80
M A X 6736–M A X 6745
th
Low-Power Dual-/Triple-Voltage SC70 µP Supervisory Circuits 6_______________________________________________________________________________________
NORMALIZED V CC /POK1/MR TIMEOUT PERIOD vs. TEMPERATURE
M A X 6736-45 t o c 04
TEMPERATURE (°C)
N O R M A L I Z E D V C C /P O K 1/M R R E S E T T I M E O U T P E R I O D
60
40
20
-20
0.9890.9940.9991.0041.0091.0141.0190.984
-40
fanti80
MAXIMUM V CC 1/V CC 2 TRANSIENT DURATION
vs. RESET THRESHOLD OVERDRIVE
RESET THRESHOLD OVERDRIVE (mV)
M A X I M U M V C C 1/V C C 2 T R A N S I E N T D U R A T I O N (µs )
100
10
100
1000
10,000
010
1000
NORMALIZED V CC RESET THRESHOLD
vs. TEMPERATURE
TEMPERATURE (°C)
N O R M A L I Z E D V C C R E S E T T H R E S H O L D
60
40200
-
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0.993
0.998
1.003
1.0080.988走遍美国mp3下载
-40
80
V CC TO RESET OUTPUT DELAY
vs. TEMPERATURE
TEMPERATURE (°C)
V C C T O R E S E T O U T P U T D E L A Y (µs )
60
下午的英文
40200
-20
33.5
38.5
43.5
48.5
28.5
-40
80
RESET INPUT TO RESET OUTPUT DELAY
vs. TEMPERATURE
TEMPERATURE (°C)
R S T I N T O R E S E T O U T P U T D E L A Y (µs )
60
40200i3d
-20
25
30
3520-40
80
POWER-FAIL INPUT TO POWER-FAIL OUTPUT DELAY vs. TEMPERATURE
TEMPERATURE (°C)
翻译器英文翻中文
P F I T O P F O D E L A Y (µs )
60
40200
-20
29
3944
4924-40
80
34Typical Operating Characteristics (continued)
(T A = +25°C, unless otherwi noted.)
