MC34164, MC33164,
NCV33164
Micropower Undervoltage
Sensing Circuits
The MC34164 series are undervoltage sensing circuits specifically
designed for use as reset controllers in portable microprocessor based
systems where extended battery life is required. These devices offer
the designer an economical solution for low voltage detection with a
single external resistor. The MC34164 series features a bandgap
reference, a comparator with precise thresholds and built−in hysteresis
to prevent erratic reset operation, an open collector reset output
capable of sinking in excess of 6.0 mA, and guaranteed operation
down to 1.0 V input with extremely low standby current. The MC
devices are packaged in 3−pin TO−226AA, micro size TSOP−5, 8−pin
SOIC−8 and Micro8™ surface mount packages. The NCV device is
packaged in SOIC−8.
Applications include direct monitoring of the 3.0 V or 5.0 V
MPU/logic power supply used in appliance, automotive, consumer,
and industrial equipment.
•
Temperature Compensated Reference
•
Monitors 3.0 V (MC34164−3) or 5.0 V (MC34164−5) Power Supplies
•
Precise Comparator Thresholds Guaranteed Over Temperature
•
Comparator Hysteresis Prevents Erratic Reset
•
Reset Output Capable of Sinking in Excess of 6.0 mA
•
Internal Clamp Diode for Discharging Delay Capacitor
•
Guaranteed Reset Operation With 1.0 V Input
•
Extremely Low Standby Current: As Low as 9.0
mA
•
Economical TO−226AA, TSOP−5, SOIC−8 and Micro8 Surface
Mount Packages
•
NCV Prefix for Automotive and Other Applications Requiring Site
and Control Changes
•
Pb−Free Packages are Available
Input
Reset
http://onsemi.com
8
1
1
2
3
SOIC−8
D SUFFIX
CASE 751
5
8
1
Micro8
DM SUFFIX
CASE 846A
1
TSOP−5
SN SUFFIX
CASE 483
TO−226AA
P SUFFIX
CASE 29
PIN CONNECTIONS
Reset 1
Input 2
N.C. 3
Ground 4
(Top View)
8 N.C.
7 N.C.
6 N.C.
5 N.C.
TSOP−5
Pin 1.
2.
3.
4.
5.
Ground
Input
Reset
NC
NC
TO−226AA
Pin 1. Reset
2. Input
3. Ground
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
1.2 V
ref
= Sink Only
Positive True Logic
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 9 of this data sheet.
GND
Figure 1. Representative Block Diagram
This device contains 28 active transistors.
©
Semiconductor Components Industries, LLC, 2005
1
August, 2005 − Rev. 16
Publication Order Number:
MC34164/D
ONSEMI [ ON SEMICONDUCTOR ]
