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
• 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
GND
N.C.
3
4
xxx M G
G
1
2
Reset
Output
V
in
(Top View)
Typical Applications
• Microprocessor Reset Controller
• Low Battery Detection
xxx
M
G
= Specific Device Code
= Date Code
= Pb−Free Package
• Power Fail Indicator
(Note: Microdot may be in either location)
• Battery Backup Detection
ORDERING INFORMATION
See detailed ordering and shipping information in the ordering
information section on page 19 of this data sheet.
NCP305LSQxxT1
NCP304xSQxxT1
Open Drain Output Configuration
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
© Semiconductor Components Industries, LLC, 2006
1
Publication Order Number:
May, 2006 − Rev. 18
NCP304/D