MOTOROLA MC34064, MC33064 Technical data

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The MC34064 is an undervoltage sensing circuit specifically designed for
use as a reset controller in microprocessor-based systems. It offers the
designer an economical solution for low voltage detection with a single
external resistor. The MC34064 features a trimmed-in-package bandgap
reference, and a comparator with precise thresholds and built-in hysteresis
to prevent erratic reset operation. The open collector reset output is capable
of sinking in excess of 10 mA, and operation is guaranteed down to 1.0 V
input with low standby current. These devices are packaged in 3-pin
TO-226AA, 8-pin SO–8 and Micro–8 surface mount packages.

Applications include direct monitoring of the 5.0 V MPU/logic power
supply used in appliance, automotive, consumer and industrial equipment.

• Trimmed-In-Package Temperature Compensated Reference

• Comparator Threshold of 4.6 V at 25°C

• Precise Comparator Thresholds Guaranteed Over Temperature

• Comparator Hysteresis Prevents Erratic Reset

• Reset Output Capable of Sinking in Excess of 10 mA

• Internal Clamp Diode for Discharging Delay Capacitor

• Guaranteed Reset Operation with 1.0 V Input

• Low Standby Current

• Economical TO–226AA, SO–8 and Micro–8 Surface Mount Packages

Order this document by MC34064/D

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UNDERVOLTAGE

SENSING CIRCUIT

SEMICONDUCTOR

TECHNICAL DATA

P SUFFIX

PLASTIC PACKAGE

CASE 29

(TO–226AA)

D SUFFIX

PLASTIC PACKAGE

CASE 751

(SO–8)

Pin 1. Reset

2. Input

1

2

3

3. Ground

8

1

Representative Block Diagram

Input

Pin numbers adjacent to terminals are for the 3–pin TO–226AA package.
Pin numbers in parenthesis are for the 8–lead packages.

2 (2)

1.2 V

ref

3 (4)

Gnd

=

This device contains 21 active transistors.

Reset

1 (1)

Sink Only
Positive True Logic

DM SUFFIX

PLASTIC PACKAGE

CASE 846A

(Micro–8)

1

Reset

2

Input

3

N.C.

4

Ground

(Top View)

8

1

8

N.C.

7

N.C.

6

N.C.

5

N.C.

ORDERING INFORMATION

Operating

Device

MC34064D–5
MC34064DM–5 Micro–8

MC34064P–5 TO–226AA
MC33064D–5 SO–8
MC33064DM–5 Micro–8
MC33064P–5 TO–226AA

Temperature Range

TA = 0° to +70°C

TA = – 40° to +85°C

Package

SO–8

MOTOROLA ANALOG IC DEVICE DATA

 Motorola, Inc. 1996 Rev 2

1

MAXIMUM RATINGS

Rating Symbol Value Unit

Power Input Supply Voltage V
Reset Output Voltage V
Reset Output Sink Current (Note 1) I

Clamp Diode Forward Current, Pin 1 to 2 (Note 1) I
Power Dissipation and Thermal Characteristics

P Suffix, Plastic Package

Maximum Power Dissipation @ TA = 25°C
Thermal Resistance, Junction–to–Air

D Suffix, Plastic Package

Maximum Power Dissipation @ TA = 25°C
Thermal Resistance, Junction–to–Air

DM Suffix, Plastic Package

Maximum Power Dissipation @ TA = 25°C

Thermal Resistance, Junction–to–Air
Operating Junction Temperature T
Operating Ambient Temperature

MC34064
MC33064

Storage Temperature Range T

NOTE: ESD data available upon request.

MC34064 MC33064

–1.0 to 10 V

10 V

Internally

Limited

100 mA

625
200

625
200

520
240

+150 °C

0 to +70

–40 to +85

–65 to +150 °C

Sink

P

R

P

R

P

R

F

θJA

θJA

θJA

T

stg

in
O

D

D

D

J

A

mA

mW

°C/W

mW

°C/W

mW

°C/W

°C

ELECTRICAL CHARACTERISTICS (For typical values T

= 25°C, for min/max values TA is the operating ambient temperature range

A

that applies [Notes 2 and 3] unless otherwise noted.)

Characteristics Symbol Min Typ Max Unit

COMPARATOR

Threshold Voltage

High State Output (Vin Increasing)
Low State Output (Vin Decreasing)
Hysteresis

V

IH

V

IL

V

H

0.01

RESET OUTPUT

Output Sink Saturation

(Vin = 4.0 V, I
(Vin = 4.0 V, I
(Vin = 1.0 V, I

Sink
Sink
Sink

= 8.0 mA)
= 2.0 mA)

= 0.1 mA)
Output Sink Current (Vin, Reset = 4.0 V) I
Output Off-State Leakage (Vin, Reset = 5.0 V) I
Clamp Diode Forward Voltage, Pin 1 to 2 (IF = 10 mA) V

V

OL

Sink

OH

F

TOTAL DEVICE

Operating Input Voltage Range V
Quiescent Input Current (Vin = 5.0 V) I

NOTES: 1. Maximum package power dissipation limits must be observed.

2.Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.

3.T

=0°C for MC34064 T

low

–40°C for MC33064 +85°C for MC33064

= +70°C for MC34064

high

in

in

1.0 to 6.5 – – V

4.5

4.5

4.61

4.59

0.02

4.7

4.7

0.05

V

V

–
–
–

0.46

0.15
–

1.0

0.4

0.1

10 27 60 mA

– 0.02 0.5 µA

0.6 0.9 1.2 V

– 390 500 µA

2

MOTOROLA ANALOG IC DEVICE DATA

MC34064 MC33064

Figure 1. Reset Output Voltage versus

Input Voltage

1

RL = 10 k to V

0

TA = 25

8.0

6.0

4.0

, OUTPUT VOL TAGE (V)

O

2.0

V

0

0 2.0 4.0 6.0 8.0 1

in

°

C

Vin, INPUT VOLTAGE (V)

Figure 3. Comparator Threshold V oltage

versus T emperature

4.630

4.620

4.610

4.600

4.590

, THRESHOLD VOLTAGE (V)

th

4.580

V

RL = 10 k to V

in

Upper Threshold

High State Output

Lower Threshold

Low State Output

Figure 2. Reset Output Voltage versus

Input Voltage

5.0
RL = 10 k to V
TA = 25

4.0

3.0

2.0

, OUTPUT VOL TAGE (V)

O

1.0

V

0

0

4.56
0

in

°

C

4.58
0

Vin, INPUT VOLTAGE (V)

4.60
0

4.62
0

4.64
0

Figure 4. Input Current versus Input Voltage

1.0

0.8

0.6

0.4

, INPUT CURRENT (mA)

0.2

in

I

TA = +25

°

C

+85

°

C

TA = +25°C

–40°C

°

C

–40

+85°C

4.570
–55 –25 0 25 50 75 100 125

TA, AMBIENT TEMPERATURE (

Figure 5. Reset

Output Saturation versus

°

C)

Sink Current

2.0
V

= 4.0 V

in

1.5

1.0

, OUTPUT SA TURATION (V)

0.5

OL

V

0

010203040

TA = 85

°

C

I

, SINK CURRENT (mA)

Sink

TA = 25

°

C

TA = –40

°

C

90%

5.0 V –

4.0 V –

10%

0

0 2.0 4.0 6.0 8.0 10

Vin, INPUT VOLTAGE (V)

Delay Time

10k

Reset

200 ns/DIV

Vin = 5.0 V to 4.0 V
RL = 10 k

°

C

TA = 25

5.0V

4.0V

Figure 6. Reset

Reset

V

in

V

in

REF

MOTOROLA ANALOG IC DEVICE DATA

3