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MAX6832HXRD1-T [MAXIM]

Industrial Control IC ; 工业控制IC\n
MAX6832HXRD1-T
型号： MAX6832HXRD1-T
厂家： MAXIM INTEGRATED PRODUCTS    MAXIM INTEGRATED PRODUCTS
描述：

Industrial Control IC
工业控制IC\n
文件： 总11页 (文件大小：198K)
中文：  中文翻译
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19-2242; Rev 0; 10/01  
Ultra-Low-Voltage SC70 Voltage Detectors  
and µP Reset Circuits  
General Description  
Features  
ꢀ Factory-Set Reset Threshold Voltages for  
The MAX6832–MAX6840 are microprocessor (µP)  
supervisory circuits used to monitor low-voltage power  
supplies in µP and digital systems. They provide excel-  
lent circuit reliability and low cost by eliminating exter-  
nal components and adjustments when used with  
+1.2V to +1.8V powered circuits.  
Nominal Supplies from 1.2V to 1.8V  
ꢀ Low Power Consumption: 7.5µA (typ)  
ꢀ Space-Saving 3- and 4-Pin SC70 Packages  
ꢀ
2.5ꢀ Reset Threshold Accuracy ꢁver  
Temperature  
These devices assert a reset signal whenever the V  
CC  
supply voltage declines below a preset threshold or  
ꢀ Five Different Timeout Periods Available: 70µs  
whenever manual reset (MR) is asserted. Reset remains  
(voltage detector), 1.5ms, 30ms, 210ms, and 1.68s  
asserted for a fixed timeout delay after V  
has risen  
CC  
above the reset threshold or when manual reset is  
deasserted. Five different timeout periods are available:  
70µs (voltage detector), 1.5ms, 30ms, 210ms, and 1.68s.  
Reset thresholds suitable for operation with a variety of  
supply voltages are available.  
ꢀ Three Reset ꢁutput Configurations  
Push-Pull RESET  
Push-Pull RESET  
ꢁpen-Drain RESET  
ꢀ Guaranteed Reset Valid to V  
0.55V—Active-Low  
=
CC  
The MAX6832/MAX6835/MAX6838 have a push-pull  
active-low reset output (RESET). The MAX6833/  
MAX6836/MAX6839 have a push-pull active-high reset  
output (RESET) and the MAX6834/MAX6837/MAX6840  
have an open-drain active-low reset output (RESET). The  
open-drain active-low reset output requires a pullup resis-  
0.75V—Active-High  
ꢀ Adjustable Threshold Reset-In ꢁption  
ꢀ Manual Reset Input ꢁption  
tor that can be connected to a voltage higher than V  
.
CC  
ꢀ Immune to Short Negative V  
Transients  
CC  
The MAX6835/MAX6836/MAX6837 feature a debounced  
manual reset input (MR), while the MAX6838/MAX6839/  
MAX6840 provide a RESET-IN input allowing the user to  
externally adjust the reset threshold. The reset compara-  
ꢀ Pin Compatible with MAX803/MAX809/MAX810,  
MAX6711/MAX6712/MAX6713, and  
MAX6381–MAX6390 Series  
tor is designed to ignore fast transients on V  
.
CC  
Ordering Information  
Low supply current of 7.5µA makes the MAX6832–  
MAX6840 ideal for use in portable equipment. These  
devices are available in 3- and 4-pin SC70 packages.  
PART  
TEMP. RANGE  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
3 SC70-3  
3 SC70-3  
3 SC70-3  
4 SC70-4  
4 SC70-4  
4 SC70-4  
4 SC70-4  
4 SC70-4  
4 SC70-4  
MAX6832_XRD_-T  
MAX6833_XRD_-T  
MAX6834_XRD_-T  
MAX6835_XSD_-T*  
MAX6836_XSD_-T*  
MAX6837_XSD_-T*  
MAX6838XSD_-T  
MAX6839XSD_-T  
MAX6840XSD_-T  
Applications  
Computers  
Controllers  
Intelligent Instruments  
Critical µP and µC Power Monitoring  
Portable/Battery-Powered Equipment  
*Future product—contact factory for availability.  
Insert the desired suffix letter from the Threshold Suffix Guide  
(MAX6832–MAX6837) and the Active Timeout Period Guide  
tables into the blanks to complete the part number. Sample  
stock is generally available on standard versions only (see  
Standard Versions table). Standard versions require a minimum  
order increment of 2.5k units. Nonstandard versions must be  
ordered in 10k unit increments. Contact factory for availability.  
All parts are offered in tape-and-reel only.  
Pin Configurations appear at end of data sheet.  
Typical Operating Circuit apears at end of data sheet.  
Selector Guide appears 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.  
Ultra-Low-Voltage SC70 Voltage Detectors  
and µP Reset Circuits  
ABSOLUTE MAXIMUM RATINGS  
Terminal Voltage (with respect to GND)  
Continous Power Dissipation (T = +70°C)  
A
V
........................................................................-0.3V to +6.0V  
3-Pin SC70 (derate 2.9mW/°C above +70°C)...............235mW  
4-Pin SC70 (derate 3.1mW/°C above +70°C)...............245mW  
Operating Temperature Range ...........................-40°C to +85°C  
Junction Temperature......................................................+150°C  
Storage Temperature Range.............................-65°C to +150°C  
Lead Temperature (soldering, 10s) .................................+300°C  
CC  
Open-Drain RESET, MR .......................................-0.3V to +6.0V  
RESET-IN, Push-Pull RESET  
and RESET ..............................................-0.3V to (V  
+ 0.3V)  
CC  
Input/Output Current (all pins) ............................................20mA  
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  
= +0.55V to +3.6V, T = T  
A
to T  
, unless otherwise noted. Typical values are at T = +25°C.) (Note 1)  
MAX A  
CC  
MIN  
PARAMETER  
SYMBOL  
CONDITIONS  
= -40°C to +85°C  
MIN  
TYP  
MAX  
UNITS  
T
A
MAX6832/MAX6835/MAX6838  
0.55  
3.6  
MAX6834/MAX6837/MAX6840  
Supply Voltage Range  
Supply Current  
V
V
CC  
T
= -40°C to +85°C  
A
0.85  
0.75  
3.6  
3.6  
MAX6833/MAX6836/MAX6839  
T
= 0°C to +85°C  
A
MAX6833/MAX6836/MAX6839  
V
V
V
= 1.2V, no load, reset not asserted  
= 1.8V, no load, reset not asserted  
= 3.6V, no load, reset not asserted  
7.5  
9
13  
16  
CC  
CC  
CC  
I
µA  
V
CC  
16  
25  
W
V
I
1.620  
1.530  
1.350  
1.275  
1.080  
1.020  
-2.5%  
-3.0%  
-25  
1.665  
1.575  
1.388  
1.313  
1.110  
1.050  
444  
1.710  
1.620  
1.425  
1.350  
1.140  
1.080  
+2.5%  
+3.0%  
+25  
Reset Threshold  
V
TH  
H
G
F (Note 2)  
1.1V ≤ V  
1.1V ≤ V  
≤ 3.3V, 0°C to +85°C  
≤ 3.3V, -40°C to +85°C  
CC  
CC  
RESET-IN Threshold  
V
mV  
nA  
RSTIN  
444  
RESET-IN Leakage Current  
Reset Threshold Hysteresis  
I
RSTIN  
V
0.75  
60  
%V  
TH  
HYS  
V
falling, step signal from  
CC  
V
or RESET-IN to Reset Delay  
µs  
CC  
(V + 100mV) to (V - 100mV)  
TH  
TH  
D0  
0.07  
1.5  
D1  
D2  
D3  
D4  
1
2
Reset Active Timeout Period  
t
20  
30  
40  
ms  
RP  
140  
1120  
210  
1680  
280  
2240  
2
_______________________________________________________________________________________  
Ultra-Low-Voltage SC70 Voltage Detectors  
and µP Reset Circuits  
ELECTRICAL CHARACTERISTICS (continued)  
(V  
= +0.55V to +3.6V, T = T  
A
to T  
, unless otherwise noted. Typical values are at T = +25°C.) (Note 1)  
MAX A  
CC  
MIN  
PARAMETER  
SYMBOL  
CONDITIONS  
rising, step signal  
MIN  
TYP  
70  
MAX  
UNITS  
µs  
V
CC  
Propagation Delay (D0 only)  
Startup Time (D0 only)  
MR Input Voltage  
t
P
from (V - 100mV) to (V + 100mV)  
TH  
TH  
V
rising from 0 to 1.1V (t < 1µs)  
150  
µs  
CC  
R
V
0.3 x V  
CC  
IL  
V
V
0.7 x V  
1
IH  
CC  
MR Minimum Input Pulse Width  
MR Glitch Rejection  
MR driven from V  
MR driven from V  
MR driven from V  
to 0  
to 0  
to 0  
µs  
ns  
ns  
kΩ  
CC  
CC  
CC  
100  
500  
20  
MR to Reset Delay  
MR Pullup Resistance To V  
14  
26  
CC  
V
V
V
≥ 0.55V, I  
=15µA, reset asserted  
0.15  
0.15  
0.2  
CC  
CC  
CC  
SINK  
Open-Drain RESET Output  
Voltage  
V
≥ 1.0V, I  
≥ 1.5V, I  
= 80µA, reset asserted  
= 200µA, reset asserted  
V
OL  
SINK  
SINK  
Open-Drain RESET Output  
Leakage Current  
I
V
> V reset not asserted  
TH,  
1.0  
µA  
LKG  
CC  
V
V
V
≥ 0.55V, I  
= 15µA, reset asserted  
0.2 x V  
CC  
CC  
CC  
SINK  
CC  
CC  
CC  
V
≥ 1.0V, I  
≥ 1.5V, I  
≥ 1.1V, I  
= 80µA, reset asserted  
= 200µA, reset asserted  
0.2 x V  
0.2 x V  
OL  
SINK  
SINK  
Push-Pull RESET Output  
Voltage  
V
= 50µA, reset not  
CC  
SOURCE  
0.8 x V  
0.8 x V  
0.8 x V  
CC  
CC  
CC  
asserted  
V
V
OH  
V
≥1.5V, I = 150µA, reset asserted  
SOURCE  
CC  
V
V
≥ 0.75V, I  
= 10µA, reset asserted  
CC  
SOURCE  
(Note 2)  
V
V
V
V
V
≥ 0.85V, I  
= 10µA, reset asserted 0.8 x V  
CC  
CC  
CC  
CC  
CC  
SOURCE  
CC  
CC  
CC  
OH  
Push-Pull RESET Output  
Voltage  
≥ 1.0V, I  
≥ 1.5V, I  
≥ 1.1V, I  
≥ 1.5V, I  
= 50µA, reset asserted  
0.8 x V  
SOURCE  
= 150µA, reset asserted 0.8 x V  
SOURCE  
= 80µA, reset not asserted  
= 200µA, reset not asserted  
0.2 x V  
0.2 x V  
SINK  
SINK  
CC  
CC  
V
OL  
Note 1: 100% production tested at +25°C. Over temperature limits are guaranteed by design.  
Note 2: Temperature range is from 0°C to +85°C.  
_______________________________________________________________________________________  
3
Ultra-Low-Voltage SC70 Voltage Detectors  
and µP Reset Circuits  
Typical Operating Characteristics  
(V  
= full range and T = -40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C).  
CC  
A
A
POWER-DOWN RESET DELAY  
vs. TEMPERATURE  
SUPPLY CURRENT vs. TEMPERATURE  
16  
14  
12  
10  
8
300  
250  
200  
150  
100  
50  
V
= OVERDRIVE (mV)  
V
= 3.6V  
OD  
CC  
V
= 3.0V  
CC  
V
= 2.5V  
CC  
V
= 1.8V  
V
= 10mV  
CC  
OD  
V
= 1.5V  
CC  
V
= 20mV  
OD  
V
6
4
V
= 100mV  
OD  
2
0
V
= 0.55V  
20  
CC  
= 200mV  
0
OD  
0
-40  
-20  
0
60  
80  
40  
-40 -20  
20  
40  
60  
80  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
NORMALIZED POWER-UP RESET  
TIMEOUT vs. TEMPERATURE  
NORMALIZED RESET THRESHOLD  
vs. TEMPERATURE  
1.003  
1.002  
1.001  
1.000  
0.999  
0.998  
0.997  
0.996  
0.995  
0.994  
1.06  
1.04  
1.02  
1.00  
0.98  
0.96  
0.94  
V
= 1.665V  
TH  
D1 OPTION  
D2 OPTION  
-40  
-20  
0
20  
40  
60  
80  
-40  
-20  
0
20  
40  
60  
80  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
4
_______________________________________________________________________________________  
Ultra-Low-Voltage SC70 Voltage Detectors  
and µP Reset Circuits  
Pin Description—MAX6832–MAX6837  
PIN  
MAX6832/  
MAX6834  
SC70-3  
MAX6835/  
MAX6837  
SC70-4  
NAME  
FUNCTION  
MAX6833  
SC70-3  
MAX6836  
SC70-4  
1
1
1
1
GND  
Ground  
Reset Output, Open-Drain or Push-Pull, Active-Low. RESET  
changes from HIGH to LOW when V drops below the  
CC  
—
2
—
2
RESET  
selected reset threshold or MR is pulled low. RESET remains  
LOW for the reset timeout period after V exceeds the device  
CC  
reset threshold and MR is released high.  
Reset Output, Push-Pull, Active-High. RESET changes from  
LOW to HIGH when the V input drops below the selected  
CC  
2
—
2
—
RESET  
reset threshold or MR is pulled low. RESET remains HIGH for  
the reset timeout period after V  
exceeds the device reset  
CC  
threshold and MR is released high.  
Active-Low Manual Reset Input. Internal 20kΩ pullup to V  
.
CC  
Pull LOW to force a reset. Reset remains active as long as MR is  
LOW and for the reset timeout period after MR goes HIGH.  
—
—
3
4
3
4
MR  
Leave unconnected or connect to V  
if unused.  
CC  
3
3
V
Supply Voltage and Monitored Supply  
CC  
Pin Description—MAX6838/MAX6839/MAX6840  
PIN  
MAX6838/  
MAX6840  
SC70-4  
NAME  
FUNCTION  
MAX6839  
SC70-4  
Adjustable Reset Threshold Input. High-impedance input for reset comparator. Connect  
this pin to an external resistive-divider network to set the reset threshold voltage; the  
1
1
RESET-IN  
typical threshold is 444mV. Reset is asserted when RESET-IN is below the threshold (V  
is not monitored).  
CC  
2
3
2
3
V
Supply Voltage (1.1V to 3.3V)  
Ground  
CC  
GND  
Reset Output, Push-Pull, Active-High. RESET changes from LOW to HIGH when the  
4
—
RESET  
RESET-IN input drops below the typical reset threshold (444mV). RESET remains HIGH for  
the reset timeout period after RESET-IN exceeds the reset threshold.  
Reset Output, Open-Drain or Push-Pull, Active-Low. RESET changes from HIGH to LOW  
when RESET-IN drops below the typical reset threshold (444mV). RESET remains LOW for  
the reset timeout period after RESET-IN exceeds the reset threshold.  
—
4
RESET  
_______________________________________________________________________________________  
5
Ultra-Low-Voltage SC70 Voltage Detectors  
and µP Reset Circuits  
Functional Diagrams  
MR (MAX6835/MAX6836/MAX6837 ONLY)  
V
CC  
V
CC  
MR  
PULLUP  
MANUAL  
RESET  
DETECT  
RESET-IN  
RESET  
TIMEOUT  
PERIOD  
RESET/  
RESET  
RESET  
OUTPUT  
RESET  
RESET/  
RESET  
RESET  
OUTPUT  
TIMEOUT  
PERIOD  
MAX6838/  
MAX6839/  
MAX6840  
V
REF  
= 444mV  
MAX6832–  
V
= 444mV  
MAX6837  
REF  
GND  
GND  
MR is driven from long cables or if the device is used in  
a noisy environment, connecting a 0.1µF capacitor from  
MR to ground provides additional noise immunity.  
Detailed Description  
Reset Output  
A microprocessor’s (µP’s) reset input starts the µP in a  
known state. The MAX6832–MAX6840 assert a reset to  
prevent code-execution errors during power-up, power-  
down, or brownout conditions. They also assert a reset  
RESET-IN Information  
The MAX6838/MAX6839/MAX6840 feature a RESET-IN  
input for monitoring supply voltages down to 0.44V. An  
external resistive-divider network can be used to set  
voltage monitoring thresholds as shown in Figure 1. As  
the monitored voltage falls, the voltage at RESET-IN  
decreases and asserts a reset when it falls below the  
signal whenever the V  
supply voltage falls below a  
CC  
preset threshold (MAX6832–MAX6837) or RESET-IN  
falls below the adjustable threshold (MAX6838/  
MAX6839/MAX6840), keeping reset asserted for a fixed  
RESET-IN threshold (V  
). The low-leakage current  
RSTIN  
timeout delay (Table 2) after V  
or RESET-IN has risen  
CC  
above the reset threshold. The MAX6832/MAX6835/  
MAX6838 use a push-pull active-low output, the  
MAX6833/MAX6836/MAX6839 have a push-pull active-  
high output, and the MAX6834/MAX6837/MAX6840  
have an open-drain active-low output stage. Connect a  
pullup resistor on the MAX6834/MAX6837/MAX6840’s  
RESET output to any supply between 0 and 6V.  
V
MONITORED  
R1  
V
CC  
MAX6838/  
MAX6839/  
MAX6840  
Manual Reset Input  
Many µP-based systems require manual reset capabili-  
ty, allowing the operator, a test technician, or external  
logic circuitry to initiate a reset. Reset remains asserted  
while MR is low, and for a fixed timeout delay after MR  
returns high. This input has an internal 20kΩ pullup  
resistor, so it can be left open if it is not used. MR can  
be driven with CMOS logic level, or with open-drain/col-  
lector outputs. To create a manual reset function, con-  
nect a normally open momentary switch from MR to  
ground; external debounce circuitry is not required. If  
RESET  
RESET-IN  
(RESET)  
R2  
GND  
( ) ARE FOR MAX6839  
R1 = R2 [(V  
/V ) -1]  
MONITORED REF  
WHERE V  
REF  
IS THE DESIRED TRIP LEVEL,  
MONITORED  
= 444mV  
V
Figure 1. Setting the Adjustable Threshold Externally  
6
_______________________________________________________________________________________  
Ultra-Low-Voltage SC70 Voltage Detectors  
and µP Reset Circuits  
at RESET-IN allows for relatively large-value resistors to  
be used, which reduce power consumption. For exam-  
ple, for a 0.6V monitored trip level, if R2 = 200kΩ, then  
can drift to undetermined voltages. This presents no  
problem in most applications since most µP and other  
circuitry are inoperative with V  
lower than 0.55V.  
CC  
R1 = 70.3kΩ. Note that the minimum V  
of 1.1V is  
However, in applications where RESET must be valid  
down to 0, adding a pulldown resistor to RESET causes  
any stray leakage currents to flow to ground, holding  
RESET low (Figure 3). R3’s value is not critical; 100kΩ  
is large enough not to load RESET and small enough to  
pull RESET to ground.  
CC  
required to guarantee the RESET-IN threshold accura-  
cy (see Electrical Characteristics table).  
Applications Information  
Negative-Going V  
CC  
Transients  
A 100kΩ pullup resistor to V  
is also recommended  
for the MAX6833/MAX6836/MAX6839 if RESET is  
required to remain valid for V < 0.85V.  
In addition to issuing a reset to the µP during power-up,  
power-down, and brownout conditions, the MAX6832–  
MAX6840 are relatively immune to short-duration nega-  
CC  
CC  
tive-going V  
transients (glitches).  
CC  
Figure 2 shows typical transient duration vs. reset com-  
parator overdrive, for which the MAX6832–MAX6840 do  
not generate a reset pulse. The graph was generated  
V
CC  
using a negative-going pulse applied to V , starting  
CC  
MAX6832  
MAX6835  
MAX6838  
0.1V above the actual reset threshold and ending  
below it by the magnitude indicated (reset comparator  
overdrive). The graph indicates the maximum pulse  
RESET  
R3  
100kΩ  
width a negative-going V  
transient can have without  
CC  
GND  
causing a reset pulse. As the magnitude of the tran-  
sient increases (goes farther below the reset threshold),  
the maximum allowable pulse width decreases. A 0.1µF  
bypass capacitor mounted as close as possible to the  
Figure 3. RESET Valid to V  
= Ground Circuit  
CC  
V
CC  
pin provides additional transient immunity.  
Interfacing to µPs with Bidirectional  
Reset Pins  
Ensuring a Valid Reset Output  
Down to V  
CC  
= 0  
Since the RESET output on the MAX6834/MAX6837/  
MAX6840 is open-drain, these devices interface easily  
with µPs that have bidirectional reset pins. Connecting  
the µP supervisor’s RESET output directly to the µP’s  
RESET pin with a single pullup resistor allows either  
device to assert a reset (Figure 4).  
When V  
falls below 0.55V, the MAX6832/MAX6835/  
CC  
MAX6838 push-pull RESET output no longer sinks cur-  
rent—it becomes an open circuit. Therefore, high-  
impedance CMOS logic inputs connected to RESET  
MAXIMUM TRANSIENT DURATION  
vs. OVERDRIVE  
900  
800  
700  
600  
V
CC  
V
V
CC  
CC  
RESET OCCURS  
ABOVE THIS  
LINE  
500  
400  
300  
200  
100  
0
BIDIRECTIONAL  
MAX6834  
MAX6837  
MAX6840  
µP  
RESET  
INPUT  
RESET  
GND  
GND  
1
10  
OVERDRIVE V - V (mV)  
100  
TH  
CC  
Figure 2. Maximum Transient Duration Without Causing a  
Reset Pulse vs. Reset Comparator Overdrive  
Figure 4. Interfacing to µPs with Bidirectional Reset I/O  
_______________________________________________________________________________________  
7
Ultra-Low-Voltage SC70 Voltage Detectors  
and µP Reset Circuits  
Using The MAX6834/MAX6837/MAX6840  
Selector Guide  
Open-Drain RESET Output  
with Multiple Supplies  
Table 1. Threshold Suffix Guide  
Generally, the pullup connected to the MAX6834/  
MAX6837/MAX6840 will connect to the supply voltage  
SUFFIX  
RESET THRESHOLD (V)  
that is being monitored at the IC’s V  
pin. However,  
W
V
I
1.665  
1.575  
1.388  
1.313  
1.110  
1.050  
CC  
some systems may use the open-drain output to level-  
shift from the monitored supply to reset circuitry pow-  
ered by some other supply (Figure 5). Note that as the  
H
G
F
MAX6834/MAX6837/MAX6840’s V  
decreases, so  
CC  
does the IC’s ability to sink current at RESET. Also, with  
any pullup, RESET will be pulled high as V declines  
CC  
toward 0. The voltage where this occurs depends on  
the pullup resistor value and the voltage to which it is  
connected.  
Table 2. Active Timeout Period Guide  
TYPICAL RESET ACTIVE  
SUFFIX  
TIMEOUT PERIOD (ms)  
+5.0V  
+1.2V  
D0  
D1  
D2  
D3  
D4  
0.07  
1.5  
30  
V
V
CC  
CC  
210  
1680  
R
PULLUP  
5V SYSTEM  
MAX6834  
MAX6837  
MAX6840  
RESET  
INPUT  
RESET  
Table 3. Standard Versions  
DEVICE  
TOP MARK  
AIQ  
MAX6832VXRD0  
MAX6832VXRD3  
MAX6832HXRD0  
MAX6832HXRD3  
MAX6832FXRD0  
MAX6832FXRD3  
MAX6833VXRD0  
MAX6833VXRD3  
MAX6833HXRD0  
MAX6833HXRD3  
MAX6833FXRD0  
MAX6833FXRD3  
MAX6834VXRD0  
MAX6834VXRD3  
MAX6834HXRD0  
MAX6834HXRD3  
MAX6834FXRD0  
MAX6834FXRD3  
MAX6835VXSD0  
GND  
GND  
AIR  
AIS  
AIT  
Figure 5. Using The MAX6834/MAX6837/MAX6840 Open-Drain  
RESET Output with Multiple Supplies  
AIU  
AIV  
Chip Information  
TRANSISTOR COUNT: 681  
AHJ  
AIW  
AIX  
PROCESS: BiCMOS  
AIY  
AIZ  
AJA  
AJB  
AJC  
AJD  
AJE  
AJF  
AJG  
AEX  
8
_______________________________________________________________________________________  
Ultra-Low-Voltage SC70 Voltage Detectors  
and µP Reset Circuits  
Pin Configurations  
TOP VIEW  
GND  
V
4
3
CC  
4
3
RESET (RESET)  
GND  
1
GND  
1
2
RESET-IN  
1
2
MAX6832  
MAX6833  
MAX6834  
MAX6835  
MAX6836  
MAX6837  
MAX6838  
MAX6839  
MAX6840  
V
CC  
3
MR  
2
V
CC  
RESET (RESET)  
RESET (RESET)  
SC70-3  
SC70-4  
SC70-4  
( ) ARE FOR MAX6836  
( ) ARE FOR MAX6833  
( ) ARE FOR MAX6839  
Typical Operating Circuit  
Selector Guide (continued)  
Table 3. Standard Versions (continued)  
V
IN  
3.3V  
1.2V  
DEVICE  
TOP MARK  
DC/DC  
CONVERTER  
MAX6835VXSD3  
MAX6835HXSD0  
MAX6835HXSD3  
MAX6835FXSD0  
MAX6835FXSD3  
MAX6836VXSD0  
MAX6836VXSD3  
MAX6836HXSD0  
MAX6836HXSD3  
MAX6836FXSD0  
MAX6836FXSD3  
MAX6837VXSD0  
MAX6837VXSD3  
MAX6837HXSD0  
MAX6837HXSD3  
MAX6837FXSD0  
MAX6837FXSD3  
MAX6838XSD0  
MAX6838XSD3  
MAX6839XSD0  
MAX6839XSD3  
MAX6840XSD0  
MAX6840XSD3  
AFF  
CORE  
SUPPLY  
I/O  
SUPPLY  
V
CC  
AFG  
AFH  
AFI  
RESET  
RESET  
µP  
GND  
AFJ  
MAX6834G/F  
AFK  
AFL  
GND  
AFM  
AFN  
AFO  
AFP  
AFQ  
AFR  
AFS  
AFT  
AFU  
AFC  
AFW  
AFV  
AFX  
AEZ  
AFY  
AFZ  
_______________________________________________________________________________________  
9
Ultra-Low-Voltage SC70 Voltage Detectors  
and µP Reset Circuits  
Package Information  
10 ______________________________________________________________________________________  
Ultra-Low-Voltage SC70 Voltage Detectors  
and µP Reset Circuits  
Package Information (continued)  
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.  
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11  
© 2001 Maxim Integrated Products  
Printed USA  
is a registered trademark of Maxim Integrated Products.  

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