MC33064

Manufacturer Part NumberMC33064
Description(MC33064 / MC34064) UNDERVOLTAGE SENSING CIRCUIT
ManufacturerMicrosemi Corporation
MC33064 datasheet
 


1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
Page 1/10

Download datasheet (151Kb)Embed
Next
T
I
P
H E
N F I N I T E
O W E R
O F
D E S C R I P T I O N
The MC34064 is an undervoltage
sensing circuit designed specifically for
use as a reset controller in microproces-
sor-based systems. It offers 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
34064 consists of a temperature stable
reference comparator with hysteresis,
high-current clamping diode and open
NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com.
PRODUCT HIGHLIGHT
S
C
U P P LY
U R R E N T V S
400
R
= No Load
385
L
370
355
340
ACTIVE
REGION
325
310
295
280
265
250
-10
-8
-6
-4
Input Voltage less Threshold Voltage - (mV)
-40 to 85
-55 to 125
Note: All surface-mount packages are available in Tape & Reel.
L
I N
Copyright © 1999
11861 W
A
Rev. 1.3
6/99
ESTERN
U
N D E R V O L T A G E
I
P
N N O V A T I O N
collector output stage capable of
sinking up to 60mA. The MC34064's
RESET output is specified to be fully
functional at V
=1V. A major improve-
IN
ment 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.
. I
V
N P U T
O L TA G E
MONITOR
REGION
-2
0
2
4
6
8
10
PA C K A G E O R D E R I N F O R M A T I O N
Plastic SOIC
T
(°C)
DM
LP
A
8-pin
0 to 70
MC34064DM
MC33064DM
Append the letter "T" to part number. (i.e. MC34064DMT)
F
M
I N I T Y
I C R O E L E C T R O N I C S
, G
G
, CA. 92841, 714-898-8121, F
VENUE
ARDEN
ROVE
MC33064/MC34064
S
C
E N S I N G
I R C U I T
D
S
R O D U C T I O N
A T A
H E E T
K E Y F E AT U R E S
Monitors 5V Supplies (V
T
Outputs Fully Defined At V
Figure 1)
Glitch-Free Supply Current During
Switching (See Product Highlight)
! Ultra-Low Supply Current (500µA Max.)
! Temperature Compensated I
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
Plastic TO-92
3-pin
MC34064LP
MC33064LP
I
.
N C
: 714-893-2570
AX
= 4.6V Typ.)
= 1V (See
IN
For
CC
1

MC33064 Summary of contents

  • Page 1

    ... 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 Plastic TO-92 3-pin MC34064LP MC33064LP — 714-893-2570 AX = 4.6V Typ (See IN For CC 1 ...

  • Page 2

    ... MC33064/MC34064 T RANSIENT ABSOLUTE MAXIMUM RATINGS Input Supply Voltage (V ) ............................................................................... -1V to 10V IN RESET Output Voltage (V ) ..................................................................................... 10V OUT Output Sink Current (I ) ............................................................ Internally Limited (mA) OL Clamp Diode Forward Current (I ), Pin 1 to pin 2 ............................................... 100mA F Operating Junction Temperature Plastic (DM Packages) .................................................................................. 150° ...

  • Page 3

    ... Note 2. Range over which the device is functional. (Unless otherwise specified, these specifications apply over the operating ambient temperatures of 0°C for the MC33064. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.) Parameter ...

  • Page 4

    ... MC33064/MC34064 T RANSIENT GRAPH / CURVE INDEX Characteristic Curves FIGURE # 1. INPUT VOLTAGE and RESET OUTPUT VOLTAGE vs. TIME 2. POWER-UP RESET VOLTAGE 3. POWER-DOWN RESET VOLTAGE RESET OUTPUT VOLTAGE vs. INPUT VOLTAGE 4. 5. THRESHOLD VOLTAGE vs. TEMPERATURE THRESHOLD HYSTERESIS vs ...

  • Page 5

    ... FIGURE 2. — POWER-UP RESET VOLTAGE 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 1.2 1.4 1.6 1.8 2.0 0 FIGURE 4. — RESET OUTPUT VOLTAGE vs. INPUT VOLTAGE 1.2 1.6 2.0 MC33064/MC34064 10kohms RESET 0.4 0.8 1.2 1.6 (t) Time - (ms 10kohms 4.58 4.59 4.60 4.61 (V ...

  • Page 6

    ... MC33064/MC34064 T RANSIENT FIGURE 5. — THRESHOLD VOLTAGE vs. TEMPERATURE 4 increasing 4 decreasing 4 10kohms L 4.66 4. High Threshold Voltage 4.62 T+ 4.6 4. Low Threshold Voltage T- 4.56 4.54 4.52 4.5 -55 - Temperature - ( C) J FIGURE 7. — SUPPLY CURRENT vs. INPUT VOLTAGE ...

  • Page 7

    ... OUT 100 125 150 FIGURE 12. — CLAMP DIODE FORWARD VOLTAGE 1.2 1.1 1 0.9 0.8 0.7 0.6 0.5 75 100 125 150 MC33064/MC34064 vs. TEMPERATURE 8mA 2mA OL -55 - 100 (T ) Temperature - ( C) J vs. FORWARD CURRENT RESET = 0V ...

  • Page 8

    ... MC33064/MC34064 T RANSIENT FIGURE 13. — PROPAGATION DELAY — HIGH to LOW 5 5.0 4.5 4.0 5.0 3.0 1 100 150 200 (t) Time - (ns MMUNE NDERVOLTAGE ENSING ...

  • Page 9

    ... Overheating of the logic level power MOSFET due to insufficient gate voltage can be prevented with the above circuit. When the input signal is below the 4.6 volt threshold of the MC34064, its output grounds the gate of the L 2 MOSFET. MC33064/MC34064 BATTERY REACHES BELOW 4.3V V ...

  • Page 10

    ... MC33064/MC34064 T RANSIENT FIGURE 19. — LOW VOLTAGE MICROPROCESSOR RESET with ADDITIONAL HYSTERESIS POWER SUPPLY 1.2 V REF ...