MAX6745 Maxim, MAX6745 Datasheet
MAX6745
Manufacturer Part Number
MAX6745
Description
(MAX6736 - MAX6745) Low-Power Dual-/Triple-Voltage SC70 UP Supervisory Circuits
Manufacturer
Maxim
Datasheet
1.MAX6745.pdf
(16 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX6745XKVD3
Manufacturer:
MAXIM/美信
Quantity:
20 000
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 V
power-fail comparator.
The MAX6736–MAX6745 monitor I/O supply voltages
(V
(V
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
temperature range.
19-2531; Rev 1; 4/03
*Manual reset detect on RESET output.
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.
CC
CC
Portable/Battery-
Powered Equipment
Multivoltage Systems
Notebook Computers
MAX6736
MAX6737
MAX6738
PART
1) from 1.8V to 5.0V and core supply voltages
2) from 0.9V to 3.3V with factory-trimmed reset
CC
________________________________________________________________ Maxim Integrated Products
1 fixed, 1 adj
MONITORS
Low-Power Dual-/Triple-Voltage SC70 µP
supply and have an independent
VOLTAGE
2 fixed
2 fixed
General Description
Controllers
PDAs
GPS Equipment
POS Equipment
OPEN-DRAIN
Applications
RESET
—
X
X
PUSH-PULL
RESET
—
—
X
o Dual-/Triple-Supply Reset Voltage Monitors
o Precision Factory-Set Reset Thresholds for
o Adjustable Reset Input Down to 0.488V
o 150ms and 1200ms (min) Reset Timeout Period
o V
o Power-Fail Input/Power-Fail Output
o 6µA Supply Current
o Tiny SC70 Package
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 V
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.
MAX6736XK_ _D_-T
MAX6737XK_ _D_-T
Monitoring from 0.9V to 5.0V
Options
Sequencing Applications (MAX6741/MAX6744)
(MAX6742/MAX6745)
CC
MANUAL
RESET
Supervisory Circuits
1 Power-OK Output for Power-Supply
PART
X
X
X
TH
POWER-FAIL
1 = 4.625V, V
OUTPUT
INPUT/
—
—
—
Ordering Information
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
TH
2 = 3.075V, and a 150ms
Selector Guide
OUTPUT
POK
—
—
—
PIN-PACKAGE
5 SC70-5
5 SC70-5
Features
RSTIN
INPUT
—
—
X
1
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