MAX6340UK28/V+T [MAXIM]

Power Supply Support Circuit,;
MAX6340UK28/V+T
型号: MAX6340UK28/V+T
厂家: MAXIM INTEGRATED PRODUCTS    MAXIM INTEGRATED PRODUCTS
描述:

Power Supply Support Circuit,

复位电路
文件: 总10页 (文件大小:240K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
19-2440; Rev 2; 10/02  
Low-Power, SC70/SOT µP Reset Circuits with  
Capacitor-Adjustable Reset Timeout Delay  
General Description  
Features  
The MAX6340/MAX6421–MAX6426 low-power micro-  
processor supervisor circuits monitor system voltages  
from 1.6V to 5V. These devices perform a single function:  
o Monitor System Voltages from 1.6V to 5V  
o Capacitor-Adjustable Reset Timeout Period  
o Low Quiescent Current (1.6µA typ)  
o Three RESET Output Options  
they assert a reset signal whenever the V  
supply volt-  
CC  
age falls below its reset threshold. The reset output  
remains asserted for the reset timeout period after V  
CC  
rises above the reset threshold. The reset timeout is exter-  
nally set by a capacitor to provide more flexibility.  
Push-Pull RESET  
Push-Pull RESET  
Open-Drain RESET  
The MAX6421/MAX6424 have an active-low, push-  
pull reset output. The MAX6422 has an active-high,  
push-pull reset output and the MAX6340/MAX6423/  
MAX6425/MAX6426 have an active-low, open-drain  
reset output. The MAX6421/MAX6422/MAX6423 are  
offered in 4-pin SC70 or SOT143 packages. The  
MAX6340/MAX6424/MAX6425/MAX6426 are available  
in 5-pin SOT23-5 packages.  
o Guaranteed Reset Valid to V  
= 1V  
CC  
o Immune to Short V  
Transients  
CC  
o Small 4-Pin SC70, 4-Pin SOT143, and 5-Pin SOT23  
Packages  
o MAX6340 Pin Compatible with LP3470  
o MAX6424/MAX6425 Pin Compatible with  
NCP300–NCP303, MC33464/MC33465,  
S807/S808/S809, and RN5VD  
Applications  
o MAX6426 Pin Compatible with PST92XX  
Portable Equipment  
Battery-Powered Computers/Controllers  
Automotive  
Ordering Information  
PART  
TEMP RANGE  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
PIN-PACKAGE  
5 SOT23-5  
4 SC70-4  
Medical Equipment  
Intelligent Instruments  
Embedded Controllers  
Critical µP Monitoring  
Set-Top Boxes  
MAX6340UK_ _-T  
MAX6421XS_ _-T  
MAX6421US_ _-T  
MAX6422XS_ _-T  
MAX6422US_ _-T  
MAX6423XS_ _-T  
MAX6423US_ _-T  
MAX6424UK_ _-T  
MAX6425UK_ _-T  
MAX6426UK_ _-T  
4 SOT143-4  
4 SC70-4  
4 SOT143-4  
4 SC70-4  
Computers  
4 SOT143-4  
5 SOT23-5  
5 SOT23-5  
5 SOT23-5  
Pin Configurations  
Note: The MAX6340/MAX6421–MAX6426 are available with fac-  
tory-trimmed reset thresholds from 1.575V to 5.0V in approxi-  
mately 0.1V increments. Insert the desired nominal reset  
threshold suffix (from Table 1) into the blanks. There are 50 stan-  
dard versions with a required order increment of 2500 pieces.  
Sample stock is generally held on standard versions only (see  
Standard Versions Table). Required order increment is 10,000  
pieces for nonstandard versions. Contact factory for availability.  
All devices are available in tape-and-reel only.  
TOP VIEW  
V
CC  
1
2
4
3
RESET  
(RESET)  
MAX6421X  
MAX6422X  
MAX6423X  
SRT  
GND  
SC70  
Typical Operating Circuit appears at end of data sheet.  
Selector Guide appears at end of data sheet.  
( ) ARE FOR THE MAX6422  
Pin Configurations continued at end of data sheet.  
________________________________________________________________ Maxim Integrated Products  
1
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.  
Low-Power, SC70/SOT µP Reset Circuits with  
Capacitor-Adjustable Reset Timeout Delay  
ABSOLUTE MAXIMUM RATINGS  
All Voltages Referenced to GND  
Continuous Power Dissipation (T = +70°C)  
A
V
........................................................................-0.3V to +6.0V  
4-Pin SC70 (derate 3.1ꢀW/°C above +70°C)..............245ꢀW  
4-Pin SOT143 (derate 4ꢀW/°C above +70°C).............320ꢀW  
5-Pin SOT23 (derate 7.1ꢀW/°C above +70°C)............571ꢀW  
Operating Teꢀperature Range .........................-40°C to +125°C  
Storage Teꢀperature Range.............................-65°C to +150°C  
Junction Teꢀperature......................................................+150°C  
Lead Teꢀperature (soldering, 10s) .................................+300°C  
CC  
SRT, RESET, RESET (push-pull).................-0.3V to (V  
+ 0.3V)  
CC  
RESET (open drain)...............................................-0.3V to +6.0V  
Input Current (all pins)...................................................... 20ꢀA  
Output Current (RESET, RESET) ...................................... 20ꢀA  
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional  
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to  
absolute maximum rating conditions for extended periods may affect device reliability.  
ELECTRICAL CHARACTERISTICS  
(V  
= 1V to 5.5V, T = T  
A
to T  
, unless otherwise specified. Typical values are at V  
= 5V and T = +25°C.) (Note 1)  
CC A  
CC  
MIN  
MAX  
PARAMETER  
SYMBOL  
CONDITIONS  
MIN  
TYP  
MAX  
5.5  
UNITS  
Supply Voltage Range  
V
1.0  
V
CC  
V
V
V
5.0V  
3.3V  
2.0V  
2.5  
1.9  
1.6  
4.2  
CC  
CC  
CC  
Supply Current  
I
3.4  
µA  
CC  
2.5  
T
T
= +25°C  
V
V
- 1.5%  
V
+ 1.5%  
+ 2.5%  
A
A
TH  
TH  
TH  
TH  
V
Reset Threshold Accuracy  
V
TH  
V
CC  
= -40°C to +125°C  
- 2.5%  
4 x V  
V
Hysteresis  
to Reset Delay  
V
ꢀV  
µs  
HYST  
TH  
V
t
V
falling at 1ꢀV/µs  
80  
CC  
RD  
CC  
C
C
= 1500pF  
= 0  
3.00  
4.375  
0.275  
240  
5.75  
SRT  
SRT  
SRT  
Reset Tiꢀeout Period  
t
ꢀs  
RP  
V
V
Raꢀp Current  
I
V
V
V
V
V
V
V
V
V
= 0 to 0.65V; V = 1.6V to 5V  
nA  
V
SRT  
SRT  
RAMP  
CC  
Raꢀp Threshold  
V
= 1.6V to 5V (V rising)  
RAMP  
0.65  
33  
TH-RAMP  
CC  
RAMP Threshold Hysteresis  
falling threshold  
ꢀV  
RAMP  
1.0V, I  
= 50µA  
0.3  
0.3  
0.4  
CC  
CC  
CC  
CC  
CC  
CC  
SINK  
SINK  
SINK  
RESET Output Voltage Low  
V
V
2.7V, I  
4.5V, I  
1.8V, I  
= 1.2ꢀA  
= 3.2ꢀA  
V
OL  
= 200µA  
= 500µA  
0.8 x V  
0.8 x V  
0.8 x V  
SOURCE  
CC  
CC  
CC  
RESET Output Voltage High,  
Push-Pull  
V
2.25V, I  
OH  
SOURCE  
4.5V, I  
= 800µA  
SOURCE  
RESET Output Leakage Current,  
Open-Drain  
I
V
> V , reset not asserted  
1.0  
µA  
LKG  
CC  
TH  
V
V
V
V
V
V
V
1.0V, I  
1.8V, I  
2.7V, I  
4.5V, I  
1.8V, I  
2.7V, I  
4.5V, I  
= 1µA  
0.8 x V  
0.8 x V  
0.8 x V  
0.8 x V  
CC  
CC  
CC  
CC  
CC  
CC  
CC  
SOURCE  
SOURCE  
SOURCE  
SOURCE  
CC  
CC  
CC  
CC  
= 150µA  
= 500µA  
= 800µA  
RESET Output Voltage High  
RESET Output Voltage Low  
V
V
V
OH  
= 500µA  
0.3  
0.3  
0.4  
SINK  
SINK  
SINK  
V
= 1.2ꢀA  
= 3.2ꢀA  
OL  
Note 1: Devices production tested at +25°C. Overteꢀperature liꢀits are guaranteed by design.  
2
_______________________________________________________________________________________  
Low-Power, SC70/SOT µP Reset Circuits with  
Capacitor-Adjustable Reset Timeout Delay  
Typical Operating Characteristics  
(V  
= 5V, C  
= 1500pF, T = +25°C, unless otherwise noted.)  
CC  
SRT  
A
SUPPLY CURRENT  
vs. SUPPLY VOLTAGE  
RESET TIMEOUT PERIOD  
vs. TEMPERATURE  
RESET TIMEOUT PERIOD vs. C  
SRT  
4.30  
4.25  
4.20  
4.15  
4.10  
4.0  
10,000  
1000  
100  
10  
C
= 1500pF  
SRT  
3.5  
3.0  
2.5  
2.0  
1.5  
1.0  
0.5  
0
T
= +125°C  
A
T
= +25°C  
A
T
= -40°C  
A
1
0.1  
0
1
2
3
4
5
6
-50 -25  
0
25  
50  
75 100 125  
1000  
100  
0.001 0.01  
0.1  
1
10  
SUPPLY VOLTAGE (V)  
TEMPERATURE (°C)  
C
(nF)  
SRT  
RESET TIMEOUT PERIOD  
vs. TEMPERATURE  
MAXIMUM TRANSIENT DURATION  
vs. RESET THRESHOLD OVERDRIVE  
V
TO RESET DELAY  
CC  
vs. TEMPERATURE (V FALLING)  
CC  
600  
550  
500  
450  
400  
175  
150  
125  
100  
75  
160  
150  
140  
130  
120  
V
FALLING AT 1mVµs  
CC  
C
= 0  
SRT  
RESET OCCURS  
ABOVE THE CURVE  
350  
300  
110  
100  
50  
25  
250  
200  
90  
80  
V
= 2.95V  
800  
TH  
0
-50 -25  
0
25  
50  
75 100 125  
0
200  
400  
600  
1000  
-50 -25  
0
25  
75 100 125  
50  
TEMPERATURE (°C)  
RESET THRESHOLD OVERDRIVE (mV)  
TEMPERATURE (°C)  
POWER-UP/POWER-DOWN  
CHARACTERISTIC  
NORMALIZED RESET THRESHOLD  
vs. TEMPERATURE  
1.006  
V
= 1.6V  
TH  
V
CC  
1.004  
1.002  
1.000  
0.998  
0.996  
0.994  
1V/div  
1V/div  
RESET  
400µs/div  
-50 -25  
0
25  
50  
75 100 125  
TEMPERATURE (°C)  
_______________________________________________________________________________________  
3
Low-Power, SC70/SOT µP Reset Circuits with  
Capacitor-Adjustable Reset Timeout Delay  
Pin Description  
PIN  
MAX6421  
MAX6422  
MAX6423  
MAX6424  
MAX6425  
MAX6340  
SOT23  
MAX6426 NAME  
SOT23  
FUNCTION  
SOT143  
SC70  
SOT23  
Set Reset Tiꢀeout Input. Connect a capacitor between SRT  
and ground to set the tiꢀeout period. Deterꢀine the period as  
1
3
3
5
1
SRT  
follows: t = 2.73 106 C  
+ 275µs with t in seconds  
RP  
RP  
SRT  
and C  
in farads.  
SRT  
2
3
4
1
2
2
1
3
4
2
2, 3  
5
GND  
N.C.  
Ground  
Not Internally Connected. Can be connected to GND.  
Supply Voltage and Reset Threshold Monitor Input  
V
CC  
RESET changes froꢀ high to low whenever V  
drops below  
CC  
the selected reset threshold voltage. RESET reꢀains low for  
5
1
4
RESET  
the reset tiꢀeout period after V  
threshold.  
exceeds the reset  
CC  
4
4
RESET changes froꢀ low to high whenever V  
drops below  
CC  
the selected reset threshold voltage. RESET reꢀains high for  
RESET  
the reset tiꢀeout period after V  
threshold.  
exceeds the reset  
CC  
Detailed Description  
3.3V  
Reset Output  
V
CC  
The reset output is typically connected to the reset input  
of a µP. A µPs reset input starts or restarts the µP in a  
known state. The MAX6340/MAX6421MAX6426 µP  
supervisory circuits provide the reset logic to prevent  
code-execution errors during power-up, power-down,  
and brownout conditions (see Typical Operating  
Characteristics).  
5.0V  
LASER-TRIMMED  
RESISTORS  
10k  
V
REF  
RESET  
N
5V  
SYSTEM  
RESET changes froꢀ high to low whenever V  
drops  
CC  
RESET  
TIMEOUT  
SRT  
below the threshold voltage. Once V  
exceeds the  
CC  
MAX6340  
MAX6423  
MAX6425  
MAX6426  
C
SRT  
threshold voltage, RESET reꢀains low for the capacitor-  
adjustable reset tiꢀeout period.  
GND  
The MAX6422 active-high RESET output is the inverse  
logic of the active-low RESET output. All device outputs  
are guaranteed valid for V  
> 1V.  
CC  
Figure 1. MAX6340/MAX6423/MAX6425/MAX6426 Open-Drain  
The MAX6340/MAX6423/MAX6425/MAX6426 are open-  
drain RESET outputs. Connect an external pullup resis-  
tor to any supply froꢀ 0 to 5.5V. Select a resistor value  
large enough to register a logic low when RESET is  
asserted and sꢀall enough to register a logic high  
while supplying all input current and leakage paths  
connected to the RESET line. A 10kto 100kpullup  
is sufficient in ꢀost applications.  
RESET Output Allows Use with Multiple Supplies  
Selecting a Reset Capacitor  
The reset tiꢀeout period is adjustable to accoꢀꢀodate  
a variety of µP applications. Adjust the reset tiꢀeout  
period (t ) by connecting a capacitor (C  
) between  
RP  
SRT  
SRT and ground. Calculate the reset tiꢀeout capacitor  
as follows:  
4
_______________________________________________________________________________________  
Low-Power, SC70/SOT µP Reset Circuits with  
Capacitor-Adjustable Reset Timeout Delay  
C
= (t - 275µs) / (2.73 106)  
SRT  
RP  
Applications Information  
Interfacing to Other Voltages for Logic  
Compatibility  
where t is in seconds and C  
is in farads.  
RP  
SRT  
The reset delay tiꢀe is set by a current/capacitor-con-  
trolled raꢀp coꢀpared to an internal 0.65V reference.  
An internal 240nA raꢀp current source charges the  
external capacitor. The charge to the capacitor is  
cleared when a reset condition is detected. Once the  
reset condition is reꢀoved, the voltage on the capacitor  
The open-drain outputs of the MAX6340/MAX6423/  
MAX6425/MAX6426 can be used to interface to µPs with  
other logic levels. As shown in Figure 1, the open-drain  
output can be connected to voltages froꢀ 0 to 5.5V. This  
allows for easy logic coꢀpatibility to various µPs.  
raꢀps according to the forꢀula: dV/dt = I/C. The C  
SRT  
capacitor ꢀust raꢀp to 0.65V to deassert the reset.  
ꢀust be a low-leakage (<10nA) type capacitor;  
Wired-OR Reset  
To allow auxiliary circuitry to hold the systeꢀ in reset,  
an external open-drain logic signal can be connected  
to the open-drain RESET of the MAX6340/MAX6423/  
MAX6425/MAX6426, as shown in Figure 2. This config-  
uration can reset the µP, but does not provide the reset  
tiꢀeout when the external logic signal is released.  
C
SRT  
ceraꢀic is recoꢀꢀended.  
Operating as a Voltage Detector  
The MAX6340/MAX6421MAX6426 can be operated in a  
voltage detector ꢀode by floating the SRT pin. The reset  
delay tiꢀes for V  
rising above or falling below the  
CC  
threshold are not significantly different. The reset output is  
deasserted sꢀoothly without false pulses.  
Negative-Going V Transients  
CC  
In addition to issuing a reset to the µP during power-up,  
power-down, and brownout conditions, these supervisors  
are relatively iꢀꢀune to short-duration negative-going  
transients (glitches). The graph Maxiꢀuꢀ Transient  
Duration vs. Reset Threshold Overdrive in the Typical  
Operating Characteristics shows this relationship.  
The area below the curve of the graph is the region in  
which these devices typically do not generate a reset  
pulse. This graph was generated using a negative-  
V
going pulse applied to V , starting above the actual  
CC  
CC  
reset threshold (V ) and ending below it by the ꢀagni-  
TH  
tude indicated (reset-threshold overdrive). As the ꢀag-  
nitude of the transient decreases (farther below the  
reset threshold), the ꢀaxiꢀuꢀ allowable pulse width  
V
DD  
10k  
MAX6340  
decreases. Typically, a V  
transient that goes 100ꢀV  
CC  
below the reset threshold and lasts 50µs or less does  
not cause a reset pulse to be issued.  
MAX6423  
MAX6425  
MAX6426  
µP  
Ensuring a Valid RESET or RESET  
RESET  
RESET  
Down to V  
CC  
= 0  
When V  
falls below 1V, RESET/RESET current-sink-  
CC  
N
ing (sourcing) capabilities decline drastically. In the  
case of the MAX6421/MAX6424, high-iꢀpedance  
CMOS-logic inputs connected to RESET can drift to  
undeterꢀined voltages. This presents no probleꢀs in  
ꢀost applications, since ꢀost µPs and other circuitry  
GND  
do not operate with V  
below 1V.  
CC  
OPEN-DRAIN  
LOGIC  
In those applications where RESET ꢀust be valid down  
to zero, adding a pulldown resistor between RESET  
and ground sinks any stray leakage currents, holding  
RESET low (Figure 3). The value of the pulldown resis-  
tor is not critical; 100kis large enough not to load  
RESET and sꢀall enough to pull RESET to ground. For  
applications using the MAX6422, a 100kpullup resis-  
N
Figure 2. Wired-OR Reset Circuit  
_______________________________________________________________________________________  
5
Low-Power, SC70/SOT µP Reset Circuits with  
Capacitor-Adjustable Reset Timeout Delay  
Table 1. Reset Threshold Voltage Suffix  
V
CC  
SUFFIX  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
47  
48  
49  
50  
MIN  
TYP  
MAX  
1.614  
1.707  
1.845  
1.948  
2.050  
2.153  
2.243  
2.371  
2.460  
2.563  
2.691  
2.768  
2.870  
2.998  
3.075  
3.152  
3.280  
3.383  
3.485  
3.558  
3.690  
3.793  
3.895  
3.998  
4.100  
4.203  
4.305  
4.408  
4.484  
4.613  
4.741  
4.818  
4.920  
5.023  
5.125  
1.536  
1.623  
1.755  
1.853  
1.950  
2.048  
2.133  
2.313  
2.340  
2.438  
2.559  
2.633  
2.730  
2.852  
2.925  
2.998  
3.120  
3.218  
3.315  
3.413  
3.510  
3.608  
3.705  
3.803  
3.900  
3.998  
4.095  
4.193  
4.266  
4.388  
4.509  
4.583  
4.680  
4.778  
4.875  
1.575  
1.665  
1.800  
1.900  
2.000  
2.100  
2.188  
2.313  
2.400  
2.500  
2.625  
2.700  
2.800  
2.925  
3.000  
3.075  
3.200  
3.300  
3.400  
3.500  
3.600  
3.700  
3.800  
3.900  
4.000  
4.100  
4.200  
4.300  
4.375  
4.500  
4.625  
4.700  
4.800  
4.900  
5.000  
V
CC  
MAX6421  
MAX6424  
RESET  
100kΩ  
GND  
Figure 3. Ensuring RESET Valid to V  
= 0  
CC  
V
CC  
100kΩ  
V
CC  
MAX6422  
RESET  
GND  
Figure 4. Ensuring RESET Valid to V  
= 0  
CC  
tor between RESET and V  
holds RESET high when  
falls below 1V (Figure 4). Open-drain RESET ver-  
sions are not recoꢀꢀended for applications requiring  
valid logic for V down to zero.  
CC  
V
CC  
CC  
Layout Consideration  
SRT is a precise current source. When developing the  
layout for the application, be careful to ꢀiniꢀize board  
capacitance and leakage currents around this pin.  
Traces connected to SRT should be kept as short as  
possible. Traces carrying high-speed digital signals  
and traces with large voltage potentials should be rout-  
ed as far froꢀ SRT as possible. Leakage current and  
stray capacitance (e.g., a scope probe) at this pin  
could cause errors in the reset tiꢀeout period. When  
evaluating these parts, use clean prototype boards to  
ensure accurate reset periods.  
6
_______________________________________________________________________________________  
Low-Power, SC70/SOT µP Reset Circuits with  
Capacitor-Adjustable Reset Timeout Delay  
Standard Versions Table  
PART*  
OUTPUT STAGE  
Open-Drain RESET  
Open-Drain RESET  
Open-Drain RESET  
Open-Drain RESET  
Open-Drain RESET  
Open-Drain RESET  
Open-Drain RESET  
Open-Drain RESET  
Open-Drain RESET  
Open-Drain RESET  
Push-Pull RESET  
TOP MARK  
KADC  
ADUF  
KADU  
ADUK  
KADW  
ADUM  
KADX  
ADUN  
KAEA  
PART*  
OUTPUT STAGE  
Open-Drain RESET  
Open-Drain RESET  
Open-Drain RESET  
Open-Drain RESET  
Open-Drain RESET  
Push-Pull RESET  
Push-Pull RESET  
Push-Pull RESET  
Push-Pull RESET  
Push-Pull RESET  
Push-Pull RESET  
Push-Pull RESET  
Push-Pull RESET  
Push-Pull RESET  
Push-Pull RESET  
Push-Pull RESET  
Push-Pull RESET  
Push-Pull RESET  
Push-Pull RESET  
Push-Pull RESET  
Push-Pull RESET  
Push-Pull RESET  
Push-Pull RESET  
Push-Pull RESET  
Push-Pull RESET  
TOP MARK  
AEBE  
AEBG  
AEBI  
MAX6340UK16-T  
MAX6340UK22-T  
MAX6340UK26-T  
MAX6340UK29-T  
MAX6340UK46-T  
MAX6421US16-T  
MAX6421XS16-T  
MAX6421US22-T  
MAX6421XS22-T  
MAX6421US26-T  
MAX6421XS26-T  
MAX6421US29-T  
MAX6421XS29-T  
MAX6421US46-T  
MAX6421XS46-T  
MAX6422US16-T  
MAX6422XS16-T  
MAX6422US22-T  
MAX6422XS22-T  
MAX6422US26-T  
MAX6422XS26-T  
MAX6422US29-T  
MAX6422XS29-T  
MAX6422US46-T  
MAX6422XS46-T  
MAX6423US16-T  
MAX6423XS16-T  
MAX6423US22-T  
MAX6423XS22-T  
MAX6423US26-T  
MAX6423XS26-T  
MAX6423US29-T  
MAX6423XS29-T  
MAX6423US46-T  
MAX6423XS46-T  
MAX6424UK16-T  
MAX6424UK22-T  
MAX6424UK26-T  
MAX6424UK29-T  
MAX6424UK46-T  
MAX6425UK16-T  
MAX6425UK22-T  
MAX6425UK26-T  
MAX6425UK29-T  
MAX6425UK46-T  
MAX6426UK16-T  
MAX6426UK22-T  
MAX6426UK26-T  
MAX6426UK29-T  
MAX6426UK46-T  
AEBJ  
AEBM  
KADA  
ACU  
KADE  
ACY  
KADG  
ADA  
ADUQ  
ADUF  
ADUK  
ADUM  
ADUN  
ADUQ  
ADUG  
ADUS  
ADUU  
ADUV  
ADUY  
ADUH  
ADVA  
ADVC  
ADVD  
ADVG  
KADH  
ADB  
Push-Pull RESET  
Push-Pull RESET  
Push-Pull RESET  
KADK  
ADE  
Push-Pull RESET  
Open-Drain RESET  
Open-Drain RESET  
Open-Drain RESET  
Open-Drain RESET  
Open-Drain RESET  
Open-Drain RESET  
Open-Drain RESET  
Open-Drain RESET  
Open-Drain RESET  
Open-Drain RESET  
KABD  
ACV  
KADM  
ADG  
KADO  
ADI  
KADP  
ADJ  
KADS  
ADM  
*Sample stock is generally held on all standard versions. Contact  
factory for availability of nonstandard versions.  
Typical Operating Circuit  
V
CC  
V
CC  
LASER-TRIMMED  
RESISTORS  
µP  
V
REF  
RESET  
RESET  
RESET  
TIMEOUT  
SRT  
C
SRT  
MAX6421  
MAX6424  
GND  
_______________________________________________________________________________________  
7
Low-Power, SC70/SOT µP Reset Circuits with  
Capacitor-Adjustable Reset Timeout Delay  
Pin Configurations (continued)  
TOP VIEW  
SRT  
1
2
3
5
4
RESET  
RESET  
1
2
3
5
4
SRT  
N.C.  
MAX6340  
MAX6424  
MAX6425  
GND  
N.C.  
V
CC  
V
GND  
CC  
SOT23  
SOT23  
SRT  
1
2
3
5
4
V
GND  
1
2
4
3
RESET  
CC  
(RESET)  
MAX6421U  
MAX6422U  
MAX6423U  
MAX6426  
GND  
GND  
V
SRT  
CC  
RESET  
SOT143  
SOT23  
Selector Guide  
PART  
PUSH-PULL RESET  
PUSH-PULL RESET  
OPEN-DRAIN RESET  
PIN-PACKAGE  
5 SOT23  
MAX6340  
MAX6421  
MAX6422  
MAX6423  
MAX6424  
MAX6425  
4 SOT143/SC70  
4 SOT143/SC70  
4 SOT143/SC70  
5 SOT23  
5 SOT23  
Chip Information  
TRANSISTOR COUNT: 295  
PROCESS: BiCMOS  
8
_______________________________________________________________________________________  
Low-Power, SC70/SOT µP Reset Circuits with  
Capacitor-Adjustable Reset Timeout Delay  
Package Information  
(The package drawing(s) in this data sheet ꢀay not reflect the ꢀost current specifications. For the latest package outline inforꢀation,  
go to www.maxim-ic.com/packages.)  
_______________________________________________________________________________________  
9
Low-Power, SC70/SOT µP Reset Circuits with  
Capacitor-Adjustable Reset Timeout Delay  
Package Information (continued)  
(The package drawing(s) in this data sheet ꢀay not reflect the ꢀost current specifications. For the latest package outline inforꢀation,  
go to www.maxim-ic.com/packages.)  
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are  
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.  
10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600  
© 2002 Maxiꢀ Integrated Products  
Printed USA  
is a registered tradeꢀark of Maxiꢀ Integrated Products.  

相关型号:

SI9130DB

5- and 3.3-V Step-Down Synchronous Converters

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY

SI9135LG-T1

SMBus Multi-Output Power-Supply Controller

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY

SI9135LG-T1-E3

SMBus Multi-Output Power-Supply Controller

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY

SI9135_11

SMBus Multi-Output Power-Supply Controller

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY

SI9136_11

Multi-Output Power-Supply Controller

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY

SI9130CG-T1-E3

Pin-Programmable Dual Controller - Portable PCs

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY

SI9130LG-T1-E3

Pin-Programmable Dual Controller - Portable PCs

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY

SI9130_11

Pin-Programmable Dual Controller - Portable PCs

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY

SI9137

Multi-Output, Sequence Selectable Power-Supply Controller for Mobile Applications

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY

SI9137DB

Multi-Output, Sequence Selectable Power-Supply Controller for Mobile Applications

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY

SI9137LG

Multi-Output, Sequence Selectable Power-Supply Controller for Mobile Applications

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY

SI9122E

500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification Drivers

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY