MC33064 / MC34064
PRODUCTION DATA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright © 1999
Rev. 1.4, 2006-12-14
2.1
WWW.Microsemi .COM
Undervoltage Sensing Circuit
TM ®
DESCRIPTION
The MC34064 is an undervoltage
sensing circuit designed specifically
for use as a reset controller in
microprocessor- based systems. It
offers the designer an economical,
space-efficient solution for low supply
voltage detection when used in
combination with a single pullup
resistor. Adding one capacitor offers
the functionality of a programmable
delay time after power returns. The
34064 consists of a temperature stable
reference comparator with hysteresis,
high-cur rent clampi ng di o de and open
collector output stage capable of
sinking up to 60mA. The MC34064's
RESET output is specified to be fully
functional at VIN=1V. A major
improvement over competing products
is the glitch-free supply current during
undervoltage detection. Competing
products demand a step function
increase in operating current during the
time that you least want or need it:
during power loss. See Product
Highlight below.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
PRODUCT HIGHLIGHT
KEY FEATURES
Monitors 5V Supplies (VT =
4.6V Typ.)
Outputs Fully Defined At VIN =
1V (See Figure 1)
Glitch-Free Supply Current
During Switching (See Product
Highlight)
Ultra-Low Supply Current
(500µA Max.)
Temperature Compensated
ICC For Extremely Stable
Current Consumption
µP Reset Function
Programmable With 1 External
Resistor And Capacitor
Comparator Hysteresis
Prevents Output Oscillation
Electrically Compatible With
Motorola MC34064
Pin-to-Pin Compatible With
Motorola MC34064 / MC34164
APPLICATIONS
All Microprocessor Or
Microcontroller Designs Using
5V Supplies
Simple 5V Undervoltage
Detection
PACKAGE ORDER INFO
DM Plastic SOIC
8-Pin LP Plastic TO-92
3-Pin PK Plastic SOT-89
3-Pin
TA (°C) RoHS / Pb-free
Transition DC: 0440
RoHS / Pb-free
Transition DC: 0509
RoHS / Pb-free
Transition DC: 0518
0 to 70 MC34064DM MC34064LP MC34064PK
-40 to 85 MC33064DM MC33064LP MC33064PK
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX34064DM-TR)
M
MC
C3
3X
X0
06
64
4