MAX6315 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – Open-Drain SOT μP Reset Circuit

19-2000; Rev 1; 1/99
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 (minimum) 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
____________________________Features
o Small SOT143 Package
o Open-Drain RESET Output Can Exceed V_CC
o Precision, Factory-Set V_CC Reset Thresholds:
100mV Increments from 2.5V to 5V
o ±1.8% Reset Threshold Accuracy at T_A = +25°C
o ±2.5% Reset Threshold Accuracy Over Temp.
o Four Reset Timeout Periods Available:
1ms, 20ms, 140ms, or 1120ms (minimum)
o Immune to Short V_CC Transients
o 5µA Supply Current
o Pin-Compatible with MAX811
Ordering and Marking Information appear at end of
data sheet.
__________Typical Operating Circuit
VCC
VCC
LASER-
TRIMMED
RESISTORS
RESET
MR CIRCUITRY
RESET
µP
RESET
RESET 2
3 MR
SOT143
MAX6315
GND
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