NCP304, NCP305
Voltage Detector Series
The NCP304 and NCP305 series are second generation ultra−low
current voltage detectors. These devices are specifically designed for
use as reset controllers in portable microprocessor based systems
where extended battery life is paramount.
Each series features a highly accurate undervoltage detector with
hysteresis which prevents erratic system reset operation as the
comparator threshold is crossed.
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The NCP304 series consists of complementary output devices that
are available with either an active high or active low reset output. The
NCP305 series has an open drain N−Channel output with an active low
reset output.
The NCP304 and NCP305 device series are available in the
SC−82AB package with standard undervoltage thresholds. Additional
thresholds that range from 0.9 V to 4.9 V in 100 mV steps can
be manufactured.
4
1
SC−82AB
SQ SUFFIX
CASE 419C
PIN CONNECTIONS AND
MARKING DIAGRAM
Features
Reset
Output
• Quiescent Current of 1.0 mA Typical
• High Accuracy Undervoltage Threshold of 2.0%
• Wide Operating Voltage Range of 0.8 V to 10 V
• Complementary or Open Drain Reset Output
• Active Low or Active High Reset Output
• Pb−Free Packages are Available*
1
4
GND
V
in
2
3
N.C.
(Top View)
xxx = Specific Device Code
M
= Date Code
Typical Applications
G
= Pb−Free Package
• Microprocessor Reset Controller
• Low Battery Detection
• Power Fail Indicator
ORDERING INFORMATION
See detailed ordering and shipping information in the ordering
information section on page 20 of this data sheet.
• Battery Backup Detection
NCP305LSQxxT1
Open Drain Output Configuration
NCP304xSQxxT1
Complementary Output Configuration
2
2
1
Input
Input
Reset Output
1
*
Reset Output
V
ref
V
ref
4
4
GND
GND
This device contains 38 active transistors.
This device contains 37 active transistors.
* The representative block diagram depicts active low reset output ‘L’ suffix devices. The comparator
input is interchanged for the active high output ‘H’ suffix devices.
Figure 1. Representative Block Diagrams
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2005
1
Publication Order Number:
NCP304/D
March, 2005 − Rev. 16