MC33164-3/MC34164-3
3 V U
N D E RV O LTA G E
S
E N S I N G
C
I R C U I T
T
H E
I
N F I N I T E
P
O W E R
O F
I
N N O VA T I O N
P
R O D U C T I O N
D
A T A
S
H E E T
DESCRIPTION
The MC33164-3 and MC34164-3 are
undervoltage sensing circuits designed
specifically for use as reset controllers in
microprocessor-based systems. They
offer the designer an economical, space
efficient solution for low supply voltage
detection when used in combination
with a single pull-up resistor. Adding
one capacitor offers the functionality of
a programmable delay time after power
returns. The MC33164-3 and MC34164-3
consist of a temperature stable reference
comparator with hysteresis, high-current
clamping diode and an open collector
output stage capable of sinking more
than 6mA over the full temperature
range. The MC33164-3 and MC34164-3's
RESET output is specified to be fully
functional at V
IN
≥
1V. See Product
Highlight below.
K E Y F E AT U R E S
s
Monitors +3.3V Supplies
(V
T
= 2.7V Typ)
s
Outputs Fully Defined At V
IN
≥
1V
(See
Product Highlight)
s
Ultra-Low Supply Current
(13µA Max.)
!
Temperature Compensated I
CC
For
Extremely Stable Current Consumption
!
µP Reset Delay Programmable With 1
External Resistor And Capacitor
!
Comparator Hysteresis Prevents Output
Oscillation (60mV Typ.)
!
Electrically Compatible With Motorola
MC34164-3
!
Pin-to-Pin Compatible With Motorola
MC34064 / MC34164
NOTE:
For current data & package dimensions, visit our web site:
http://www.linfinity.com.
PRODUCT HIGHLIGHT
RESET O
UTPUT VS
. I
N P U T
V
O L TA G E
10
APPLICATIONS
s
All Microprocessor Or Microcontroller
Designs Using 3V/3.3V Supplies
3
RESET Output Voltage - (V)
s
Simple 3V/3.3V Undervoltage Detection
2
1
Undefined
0
0
1
2
3
10
Input Voltage - (V)
PA C K A G E O R D E R I N F O R M A T I O N
T
A
(°C)
0 to 70
-40 to 85
DM
Plastic SOIC
8-pin
MC34164-3DM
MC33164-3DM
LP
Plastic TO-92
3-pin
MC34164-3LP
MC33164-3LP
Note: All surface-mount packages are available in Tape & Reel.
Append the letter "T" to part number. (i.e. MC34164-3DMT)
Copyright © 1999
Rev. 1.2 6/99
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
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