© Semiconductor Components Industries, LLC, 2000

April, 2000 – Rev. 2

1

Publication Order Number:

MC34161/D

MC34161, MC33161

Universal Voltage Monitors

The MC34161/MC33161 are universal voltage monitors intended

for use in a wide variety of voltage sensing applications. These devices

offer the circuit designer an economical solution for positive and

negative voltage detection. The circuit consists of two comparator

channels each with hysteresis, a unique Mode Select Input for channel

programming, a pinned out 2.54 V reference, and two open collector

outputs capable of sinking in excess of 10 mA. Each comparator

channel can be configured as either inverting or noninverting by the

Mode Select Input. This allows over, under, and window detection of

positive and negative voltages. The minimum supply voltage needed

for these devices to be fully functional is 2.0 V for positive voltage

sensing and 4.0 V for negative voltage sensing.

Applications include direct monitoring of positive and negative

voltages used in appliance, automotive, consumer, and industrial

equipment.

Negative Voltage Sensing

Simplified Block Diagram

(Positive Voltage Window Detector Application)

VCC

6

1

7

VS

2

3

+

1.27V

+

1.27V

+

2.8V

+

0.6V

+

–

8

5

2.54V

Reference

–

+

–

+

+

–

4

Device

Package

Shipping

ORDERING INFORMATION

MC34161D

SO–8

98 Units/Rail

MC34161P

PDIP–8

MC33161D

SO–8

PDIP–8

P SUFFIX

CASE 626

1

8

http://onsemi.com

50 Units/Rail

98 Units/Rail

SO–8

D SUFFIX

CASE 751

1

8

MC33161DR2

SO–8

2500 Tape & Reel

MC34161DR2

SO–8

2500 Tape & Reel

MC33161P

PDIP–8

50 Units/Rail

MARKING

DIAGRAMS

x

= 3 or 4

A

= Assembly Location

WL, L

= Wafer Lot

YY, Y

= Year

WW, W = Work Week

PIN CONNECTIONS

Vref

Input 1

Input 2

Gnd

VCC

Mode Select

Output 1

Output 2

1

2

3

4

8

7

6

5

(TOP VIEW)

ALYW

3x161

1

8

AWL

MC3x161P

1

8

YYWW