Microsemi Corporation MC34064LP, MC34064DM, MC33064DM, MC33064LP Datasheet
MC33064/MC34064
U
NDERVOLTAGE SENSING CIRCUIT
T HE I NFINITE P OWER OF I NNOVATION
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,
collector output stage capable of
sinking up to 60mA. The MC34064's
RESET output is specified to be fully
functional at V
ment over competing products is the
=1V. A major improve-
IN
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.
high-current clamping diode and open
NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com.
PRODUCT HIGHLIGHT
SUPPLY CURRENT VS. INPUT VOLTAGE
400
385
RL = No Load
370
P RODUCTION DATA SHEET
KEY FEATURES
■ Monitors 5V Supplies (VT = 4.6V Typ.)
■ Outputs Fully Defined At V
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
■■
IN
= 1V (See
355
340
325
310
295
) Supply Current - ( A)
CC
(I
280
265
250
ACTIVE
REGION
-8 -4 -2
-10 -6 0
Input Voltage less Threshold Voltage - (mV)
MONITOR
REGION
SWITCHING REGION
246810
PACKAGE ORDER INFORMATION
T
(°C)
A
Plastic SOIC
DM
8-pin
Plastic TO-92
LP
3-pin
0 to 70 MC34064DM MC34064LP
-40 to 85 MC33064DM MC33064LP
-55 to 125 — —
Note: All surface-mount packages are available in Tape & Reel.
Append the letter "T" to part number. (i.e. MC34064DMT)
Copyright © 1999
Rev. 1.3 6/99
L INF INITY MICROELECTRONICS INC.
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570
1
PRODUCT DATABOOK 1996/1997
MC33064/MC34064
TRANSIENT IMMUNE UNDERVOLTAGE SENSING CIRCUIT
P RODUCTION DATA SHEET
ABSOLUTE MAXIMUM RATINGS (Note 1)
Input Supply Voltage (VIN) ............................................................................... -1V to 10V
RESET Output Voltage (V
Output Sink Current (I
Clamp Diode Forward Current (IF), Pin 1 to pin 2............................................... 100mA
) ..................................................................................... 10V
OUT
) ............................................................ Internally Limited (mA)
OL
Operating Junction Temperature
Plastic (DM, LP - Packages) .................................................................................. 150°C
Storage Temperature Range ...................................................................... -65°C to 150°C
Lead Temperature (Soldering, 10 seconds) ............................................................. 300°C
Note 1. Values beyond which damage may occur. All voltages are specified with respect to
ground, and all currents are positive into the specified terminal.
THERMAL DATA
DM PACKAGE:
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
θθ
θ
θθ
JA
165°C/W
LP PACKAGE:
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
θθ
θ
θθ
JA
156°C/W
Junction Temperature Calculation: TJ = TA + (PD x θJA).
The θJA numbers are guidelines for the thermal performance of the device/pc-board system.
All of the above assume no ambient airflow
BLOCK DIAGRAM
V
IN
PACKAGE PIN OUTS
RESET
V
N.C.
GROUND
18
27
IN
36
45
DM PACKAGE
(Top View)
3. GROUND
2. V
1. RESET
LP PACKAGE
(Top View)
N.C.
N.C.
N.C.
N.C.
IN
1.2 V
REF
GROUND
RESET
2
Copyright © 1999
Rev. 1.3 6/99
PRODUCT DATABOOK 1996/1997
MC33064/MC34064
U
NDERVOLTAGE SENSING CIRCUIT
P RODUCTION DATA SHEET
RECOMMENDED OPERATING CONDITIONS (Note 2)
Parameter
Symbol
Input Supply Voltage V
RESET Output Voltage V
Clamp Diode Forward Current I
IN
OUT
F
Recommended Operating Conditions
Min. Typ. Max.
1 6.5 V
6.5 V
50mA
Units
Operating Ambient Temperature Range:
MC34064 T
MC33064 T
A
A
070°C
-40 85 °C
Note 2. Range over which the device is functional.
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the operating ambient temperatures of 0°C ≤ TA ≤ 70°C for the MC34064 and -40°C ≤ TA ≤ 85°C
for the MC33064. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
Parameter
Symbol
Test Conditions Units
MC34064/MC33064
Min. Typ. Max.
Comparator Section
Threshold Voltage
High State Output V
Low State Output V
Hysteresis V
Increasing — 4V to 5V
T+VIN
VIN Decreasing — 5V to 4V
T-
H
4.5 4.61 4.7 V
4.5 4.59 4.7 V
0.01 0.02 0.05 V
RESET Output Section
Output Low Level Saturation Voltage VIN = 4.0V, IOL = 8.0mA
V
OLVIN
= 4.0V, IOL = 2.0mA
VIN = 1.0V, IOL = 0.1mA
Output Low Level Current I
Output Off-State Leakage I
VIN = V
VIN = V
OUT
OUT
= 4.0V
= 5.0V
OL
OH
Clamp Diode Forward Voltage VFPin 1 to pin 2, IF = 10mA
10 27 60 mA
0.02 0.5 µA
0.6 0.9 1.2 V
1.0 V
0.4 V
0.1 V
Total Device
Supply Current I
CC
VIN = 5.0V
390 500 µA
Copyright © 1999
Rev. 1.3 6/99
3
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