19-2531; Rev 1; 4/03
Low-Power Dual-/Triple-Voltage SC70 µP
The MAX6736–MAX6745 are low-power dual-/triple-
voltage microprocessor (µP) supervisors. These
devices assert a reset if any monitored supply falls
below its factory-trimmed or adjustable threshold and
maintain reset for a minimum timeout period after all
supplies rise above their thresholds. The integrated
dual/triple supervisory circuits significantly reduce size
and power compared to separate ICs or discrete com-
ponents. The low supply current of 6µA makes these
devices ideal for portable equipment.
The MAX6736/MAX6737 are dual fixed-voltage µP
supervisors with a manual reset input. The MAX6738/
MAX6739 have one fixed and one adjustable reset
threshold and a manual reset input. The MAX6740/
MAX6743 are triple-voltage µP supervisors with two
fixed and one user-adjustable reset threshold inputs.
The MAX6741/MAX6744 are dual-voltage µP supervi-
sors with a power-OK (POK) output ideal for power-
supply sequencing. The MAX6742/MAX6745 monitor
the primary VCC supply and have an independent
The MAX6736–MAX6745 monitor I/O supply voltages
(VCC1) from 1.8V to 5.0V and core supply voltages
(VCC2) from 0.9V to 3.3V with factory-trimmed reset
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 reset outputs along
with manual reset input and power-fail input/output fea-
tures are available (see 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
o Dual-/Triple-Supply Reset Voltage Monitors
o Precision Factory-Set Reset Thresholds for
Monitoring from 0.9V to 5.0V
o Adjustable Reset Input Down to 0.488V
o 150ms and 1200ms (min) Reset Timeout Period
o VCC1 Power-OK Output for Power-Supply
Sequencing Applications (MAX6741/MAX6744)
o Power-Fail Input/Power-Fail Output
o 6µA Supply Current
o Tiny SC70 Package
TEMP RANGE PIN-PACKAGE
MAX6736XK_ _D_-T -40°C to +85°C 5 SC70-5
MAX6737XK_ _D_-T -40°C to +85°C 5 SC70-5
Note: The first “_ _” or “_” are placeholders for the threshold
voltage levels of the devices. Desired threshold levels are set
by the part number suffix found in Tables 1 and 2. The “_” after
the D is a placeholder for the reset timeout period suffix found
in Table 3. For example, the MAX6736XKLTD3-T is a dual-volt-
age supervisor VTH1 = 4.625V, VTH2 = 3.075V, and a 150ms
minimum reset timeout period. All devices are available in
tape-and-reel only. There is a 2500-piece minimum order
increment for standard versions (see 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.
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.
1 fixed, 1 adj
*Manual reset detect on RESET output.
________________________________________________________________ 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.