MC34064D-5G Datasheet, PDF (1/11 Pages) ON Semiconductor – Undervoltage Sensing Circuit

MC34064, MC33064,
NCV33064
Undervoltage Sensing
Circuit
The MC34064 is an undervoltage sensing circuit specifically
designed for use as a reset controller in microprocessor−based
systems. It offers the designer an economical solution for low voltage
detection with a single external resistor. The MC34064 features a
trimmed−in−package bandgap reference, and a comparator with
precise thresholds and built-in hysteresis to prevent erratic reset
operation. The open collector reset output is capable of sinking in
excess of 10 mA, and operation is guaranteed down to 1.0 V input with
low standby current. The MC devices are packaged in 3−pin TO-92,
micro size TSOP−5, 8−pin SOIC−8 and Micro8t surface mount
packages. The NCV device is packaged in SOIC−8 and TO−92.
Applications include direct monitoring of the 5.0 V MPU/logic
power supply used in appliance, automotive, consumer and industrial
equipment.
Features
• Trimmed−In−Package Temperature Compensated Reference
• Comparator Threshold of 4.6 V at 25°C
• Precise Comparator Thresholds Guaranteed Over Temperature
• Comparator Hysteresis Prevents Erratic Reset
• Reset Output Capable of Sinking in Excess of 10 mA
• Internal Clamp Diode for Discharging Delay Capacitor
• Guaranteed Reset Operation with 1.0 V Input
• Low Standby Current
• Economical TO−92, 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
1.2 V_ref
GND
=
Sink Only
Positive True Logic
This device contains 21 active transistors.
Figure 1. Representative Block Diagram
© Semiconductor Components Industries, LLC, 2008
1
August, 2008 − Rev. 18
http://onsemi.com
8
1
8
1
5
1
SOIC−8
D SUFFIX
CASE 751
Micro8
DM SUFFIX
CASE 846A
TSOP−5
SN SUFFIX
CASE 483
Pin 1. Ground
2. Input
3. Reset
4. NC
5. NC
TO−92
P SUFFIX
CASE 29
123
STRAIGHT LEAD
BULK PACK
1
2
3
BENT LEAD
TAPE & REEL
AMMO PACK
Pin 1. Reset
2. Input
3. Ground
PIN CONNECTIONS
Reset 1
Input 2
N.C. 3
Ground ⁴
8 N.C.
7 N.C.
6 N.C.
5 _N.C.
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 6 of this data sheet.
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 7 of this data sheet.
Publication Order Number:
MC34064/D