MC33064 / MC34064
U
NDERVOLTAGE
S
ENSING
C
IRCUIT
T
H E
I
N F I N I T E
P
O W E R
O F
I
N N O V A T I O N
P
R O D U C T I O N
D
A T A
S
H E E T
DESCRIPTION
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
KEY FEATURES
All Microprocessor Or
Microcontroller Designs
Using 5V Supplies
Simple 5V Undervoltage
Detection
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-current clamping
diode 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
T
A
(°C)
0 to 70
-40 to 85
DM
PACKAGE ORDER INFO
Plastic SOIC
Plastic TO-92
LP
3-Pin
8-Pin
RoHS / Pb-free
Transition DC: 0509
PK
Plastic SOT-89
3-Pin
RoHS / Pb-free
Transition DC: 0440
RoHS / Pb-free
Transition DC: 0518
MC34064DM
MC33064DM
MC34064LP
MC33064LP
MC34064PK
MC33064PK
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. MC34064DM-TR)
Copyright
©
1999
Rev. 1.3a,2005-03-01
L
IN
F
INITY
M
ICROELECTRONICS
I
NC
.
11861 W
ESTERN
A
VENUE
, G
ARDEN
G
ROVE
, CA. 92841, 714-898-8121, F
AX
: 714-893-2570
1
MICROSEMI [ MICROSEMI CORPORATION ]
