PT7M1818 Datasheet, PDF (1/6 Pages) Pericom Semiconductor Corporation – Supervisory Circuit

PT7M1818/1813
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Supervisory Circuit
Features
 Highly accurate: 1.5% (25°C)
 Accurate power monitoring: 2.5V, 2.9V, 3.0V
(PT7M1818), and 4.1, 4.3, 4.6V (PT7M1813)
 Operating voltage range: 1.0V ~ 5.5V
 Operating temperature range: -40°C to + 85°C
 Detect voltage temperature characteristics: 2.5% 
TYP
 Efficient open-drain output with internal 5k pull-up
resistor
 Maintains reset for 200ms after V_CC returns to an in-
tolerance condition
Description
The series are designed to monitor power supplies in µP
and digital systems. It provides excellent circuit
reliability and low cost by eliminating external
components and adjustments.
This device performs a single function: it asserts a reset
signal whenever the V_CC supply voltage falls below a
preset threshold. Reset remains asserted for 200ms after
V_CC has risen above the reset threshold.
PT7M1818/1813 are bidirectional output, allowing it to
be directly connected to µP with bidirectional reset
inputs.
Pin Configuration
PT7M1818/1813
1 _RST
GND 3
2 VCC
SOT23-3
Pin Description
Name
Type
RST
I/O
GND
P
V_CC
P
Description
Reset Output and Pushbutton Input: RST is asserted when V_CC drops below voltage threshold
V_TH-. Active low. When other devices pull RST low, the reset condition occurs and will remain a
reset timeout period after the external signal is off.
Ground
Supply Voltage.
2014-08-0010
PT0190-7
09/11/14
1