MAX6315US31D2 Datasheet, PDF (1/7 Pages) Maxim Integrated Products – Open-Drain SOT μP Reset Circuit

19-2000; Rev 3; 12/05
Open-Drain SOT µP Reset Circuit
________________General Description
The MAX6315 low-power CMOS microprocessor (µP)
supervisory circuit is designed to monitor power sup-
plies in µP and digital systems. It provides excellent cir-
cuit reliability and low cost by eliminating external
components and adjustments. The MAX6315 also pro-
vides a debounced manual reset input.
This device performs a single function: it asserts a reset
signal whenever the V_CC supply voltage falls below a
preset threshold or whenever manual reset is asserted.
Reset remains asserted for an internally programmed
interval (reset timeout period) after V_CC has risen above
the reset threshold or manual reset is deasserted. The
MAX6315’s open-drain RESET output can be pulled up
to a voltage higher than V_CC.
The MAX6315 comes with factory-trimmed reset thresh-
old voltages in 100mV increments from 2.5V to 5V.
Preset timeout periods of 1ms, 20ms, 140ms, and
1120ms (min) are also available. The device comes in a
SOT143 package.
For microcontrollers (µCs) and µPs with bidirectional
reset pins, see the MAX6314 data sheet.
________________________Applications
Computers
Controllers
Intelligent Instruments
Critical µP and µC Power Monitoring
Portable/Battery-Powered Equipment
Pin Configuration
TOP VIEW
GND 1
MAX6315
4 V_CC
RESET 2
3 MR
SOT143
____________________________Features
♦ Small SOT143 Package
♦ Open-Drain RESET Output Can Exceed V_CC
♦ Precision, Factory-Set V_CC Reset Thresholds:
100mV Increments from 2.5V to 5V
♦ Four Reset Timeout Periods Available:
1ms, 20ms, 140ms, or 1120ms (minimum)
♦ Immune to Short V_CC Transients
♦ 5µA Supply Current
♦ Pin-Compatible with MAX811
♦ Guaranteed Over Temperature
______________Ordering Information
PART^†
MAX6315US50D1-T
NOMINAL MIN t_RP
V_TH (V)
(ms)
5.00
1
TOP
MARK^††
FX_ _
†_{The MAX6315 is available in a SOT143 package, -40°C to}
+125°C temperature range.
††_{The first two letters in the package top mark identify the part,}
while the remaining two letters are the lot tracking code.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
Note: All devices available in tape-and-reel only. Contact fac-
tory for availability.
Ordering Information continued at end of data sheet.
__________Typical Operating Circuit
VCC
VCC
LASER-
TRIMMED
RESISTORS
RESET
MR CIRCUITRY
MAX6315
GND
RESET
µP
RESET
________________________________________________________________ Maxim Integrated Products 1
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