General Description The MAX6381–MAX6390 microprocessor (µP) supervisory circuits monitor power-supply voltages from +1.8V to +5.0V while consuming only 3µA of supply current at +1.8V. Whenever V CC falls below the factory-t ret thresholds, the ret output asrts and remains asrt-ed for a minimum ret timeout period after V CC ris above the ret threshold. Ret thresholds are available from +1.58V to +4.63V, in approximately 100mV incre-ments. Seven minimum ret timeout delays ranging from 1ms to 1200ms are available.
The MAX6381/MAX6384/MAX6387 have a push-pull active-low ret output. The MAX6382/MAX6385/ MAX6388 have a push-pull active-high ret output, and the MAX6383/MAX6386/MAX6389/MAX6390 have an open-drain active-low ret output. The MAX6384/MAX6385/MAX6386 also feature a debounced manual ret input (with internal pullup resistor). The MAX6387/MAX6388/MAX6389 have an auxiliary input for monitoring a cond voltage. The MAX6390 offers a manual ret input with a longer V CC ret timeout period (1120ms or 1200ms) and a shorter manual ret timeout (140ms or 150ms).
The MAX6381/MAX6382/MAX6383 are available in 3-pin SC70 and6-pinµDFN packages and the MAX6384–MAX6390 are available in 4-pin SC70 and
Features
♦Factory-Set Ret Threshold Voltages Ranging
from +1.58V to +4.63V in Approximately 100mV
Increments
星期五的英语单词♦±2.5% Ret Threshold Accuracy Over
Temperature (-40°C to +125°C)
♦Seven Ret Timeout Periods Available: 1ms,
20ms, 140ms, 280ms, 560ms, 1120ms,
1200ms (min)
♦3 Ret Output Options
Active-Low Push-Pull
Active-High Push-Pull
Active-Low Open-Drain
♦Ret Output State Guaranteed Valid
Down to V CC= 1V
♦Manual Ret Input (MAX6384/MAX6385/MAX6386)
♦Auxiliary RESET IN
(MAX6387/MAX6388/MAX6389)
♦V CC Ret Timeout (1120ms or 1200ms)/Manual
Ret Timeout (140ms or 150ms) (MAX6390)
♦Negative-Going V CC Transient Immunity
♦Low Power Consumption of 6µA at +3.6V
and 3µA at +1.8V
北京澳际
♦Pin Compatible with
MAX809/MAX810/MAX803/MAX6326/MAX6327/
MAX6328/MAX6346/MAX6347/MAX6348,
and MAX6711/MAX6712/MAX6713
中文转换日文♦Tiny 3-Pin/4-Pin SC70 and 6-Pin µDFN Packages
MAX6381–MAX6390 SC70/µDFN, Single/Dual Low-Voltage,
Low-Power µP Ret Circuits ________________________________________________________________Maxim Integrated Products1
Pin Configurations
19-1839; Rev 4; 4/07
Ordering Information
Ordering Information continued at end of data sheet.
Typi cal Operati ng Ci rcui t appears at end of data sheet.
Selector Guide appears at end of data sheet.
after "XR", "XS", or "LT." Inrt ret timeout delay (e Ret
Timeout Delay table) after "D" to complete the part number.
Sample stock is generally held on standard versions only (e
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 of nonstandard versions.研究生复试英语口语
+Denotes a lead-free package.
For pricing, delivery, and ordering information,plea contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at
Computers
Controllers
Intelligent Instruments
Critical µP and µC
Power Monitoring
Portable/Battery-
Powered Equipment
Dual Voltage Systems
M A X 6381–M A X 6390
SC70/µDFN, Single/Dual Low-Voltage, Low-Power µP Ret Circuits
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V CC = full range, T A = -40°C to +125°C, unless otherwi specified. 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 .-0.3V to +6.0V RESET -0.3V to +6.0V RESET , RESET (push-pull output)..............-0.3V to (V CC + 0.3V)MR , -0.3V to (V CC + 0.3V)Input Current (V CC ).............................................................20mA Output Current (all pins).....................................................20mA
Continuous Power Dissipation (T A = +70°C)
3-Pin SC70 (derate 2.9mW/°C above +70°C)..............235mW 4-Pin SC70 (derate 3.1mW/°C above +70°C)..............245mW 6-Pin µDFN (derate 2.1mW/°C above +70°C)..........167.7mW Operating Temperature Range .........................-40°C to +125°C Storage -65°C to +150°C Lead Temperature (soldering, 10s).................................+300°C
英语作文经典句子
MAX6381–MAX6390
SC70/µDFN, Single/Dual Low-Voltage,
Low-Power µP Ret Circuits
_______________________________________________________________________________________3
M A X 6381–M A X 6390
SC70/µDFN, Single/Dual Low-Voltage, Low-Power µP Ret Circuits 4______________________________________________________________________________________
Typical Operating Characteristics
(T A = +25°C, unless otherwi noted.)
215436789-40-105-25203550658095110125
SUPPLY CURRENT vs. TEMPERATURE
(NO LOAD)
TEMPERATURE (°C)
S U P P L Y C U R R E N T (µA )
25
292735333137394143
-40-105-2520355065
8095110125
POWER-DOWN RESET DELAY
vs. TEMPERATURE
TEMPERATURE (°C)
P O W E R -D O W N R E S E T D E L A Y (µs )
0.94
0.980.961.021.001.061.041.08-40-10520-253550658095110125
NORMALIZED POWER-UP RESET TIMEOUT
vs. TEMPERATURE
M A X 6381/90 t o c 03
TEMPERATURE (°C)
N O R M A L I Z E D R E S E T T I M E O U T P E R I O D
0.990
0.985
1.0150.9950.9901.0001.0051.0101.020-40-10520-253550958011065125
M A X 6381/90 t o c 04
TEMPERATURE (°C)
N O R M A L I Z E D R E S E T T
H R E S H O L D NORMALIZED RESET THRESHOLD
vs. TEMPERATURE
00.40.20.8
2011高考成绩查询0.6
1.01.20
63
英孚英语培训费用9
12
OUTPUT-VOLTAGE LOW vs. SINK CURRENT
I SINK (mA)
V O L (V )
01.0
0.52.01.52.53.00
500
750
250
1000
1250
1500
OUTPUT-VOLTAGE HIGH vs. SOURCE CURRENT
I SOURCE (µA)
V O H (V )
4500
1
1000100
10
MAXIMUM TRANSIENT DURATION vs. RESET COMPARATOR OVERDRIVE
15050350250500
200100400300RESET COMPARATOR OVERDRIVE, V TH - V CC (mV)
M A X I M U M T R A N S I E N T D U R A T I O N (µs )
3.5
3.93.7
4.54.34.14.74.9
5.35.15.5
英文版童话-40-105-25203550658095110125
RESET IN TO RESET DELAY
vs. TEMPERATURE
M A X 6381/90 t o c 08
TEMPERATURE (°C)
R E S E T I N D E L A Y (µs )
MAX6381–MAX6390
音频小说
SC70/µDFN, Single/Dual Low-Voltage,
Low-Power µP Ret Circuits
Pin Description
M A X 6381–M A X 6390
SC70/µDFN, Single/Dual Low-Voltage, Low-Power µP Ret Circuits 6_______________________________________________________________________________________
Detailed Description
RESET Output
A µP ret input starts the µP in a known state. The µP supervisory circuits asrt ret to prevent code execution errors during power-up, power-down, or brownout conditions.
Ret asrts when V CC is below the ret threshold;once V CC exceeds the ret threshold, an internal timer keeps the ret output asrted for the ret timeout period. After this interval, ret output deasrts. Ret output is guaranteed to be in the correct logic state for V CC ≥1V.
Manual Ret Input (MAX6384/MAX6385/MAX6386/MAX6390)
Many µP-bad products require manual ret capabil-ity, allowing the operator, a test technician, or external logic circuitry to initiate a ret. A logic low on MR asrts ret. Ret remains asrted while MR is low,and for the ret active timeout period (t RP ) after MR returns high. This input has an internal 63k Ωpullup resistor (1.56k Ωfor MAX6390), so it can be left uncon-nected if it is not ud.雅思听力标准
MR can be driven with TTL or CMOS logic levels, or with open-drain/collector outputs.Connect a normally open momentary switch from MR to G ND to create a manual-ret function; external debounce circuitry is not required. If MR is driven from long cables or if the device is ud in a noisy environ-ment, connecting a 0.1µF capacitor from MR to G ND provides additional noi immunity.
RESET IN Comparator
(MAX6387/MAX6388/MAX6389)
RESET IN is compared to an internal +1.27V reference.If the voltage at RESET IN is less than 1.27V, ret asrts. U the RESET IN comparator as a ur-adjustable ret detector or as a condary power-sup-ply monitor by implementing a resistor-divider at RESET IN (shown in Figure 1). Ret asrts when either V CC or RESET IN falls below its respective threshold volt-age. U the following equation to t the threshold:
V INTH = V THRST (R1/R2 + 1)where V THRST = +1.27V. To simplify the resistor lec-tion, choo a value of R2 and calculate R1:
R1 = R2 [(V INTH /V THRST ) - 1]
Since the input current at RESET IN is 50nA (max),large values can be ud for R2 with no significant loss in accuracy.
___________Applications Information
Negative-Going V CC Transients
In addition to issuing a ret to the µP during power-up,power-down, and brownout conditions, the MAX6381–MAX6390 are relatively immune to short dura-tion negative-going V CC transients (glitches).
The Typical Operating Characteristics ction shows the Maximum Transient Durations vs. Ret Comparator Overdrive, for which the MAX6381–MAX6390 do not generate a ret pul. This graph was generated using
