ST STM1061 User Manual

STM1061

Low Power Voltage Detector

Features

■ Factory-trimmed Voltage Thresholds in 0.1V

Increments from 1.6 to 5.5V

■ ±2% Voltage Threshold Accuracy

■ Operating Voltage 0.7 to 6.0V

■ Open Drain Output

■ Low Supply Current of 0.9µA (typ)

■

Guaranteed OU T Assertio n Down to VCC = 0.7V

■ Power Supply Transient Immunity

■ Available in SOT23-3 and SOT323-3 (SC70-3)

packages

■ Operating Temperature –40 to 85°C.

Figure 1. Packages

SOT23-3 (WX)

SOT323-3, SC70-3 (W)

1. Contact local sales office for availability.

(1)

July 20 0 6 Rev 4 1/23

www.st.com

1

Contents STM1061

Contents

1 Summary Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1 OUT (Open Drain) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2 V

2.3 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

CC

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

SS

3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.1 Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.2 Negative-Going V

Transients and Undershoot . . . . . . . . . . . . . . . . . . . . 8

CC

4 Typical Operating Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5 Maximum Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

6 DC and AC Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

7 Package Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

8 Part Numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

9 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2/23

STM1061 List of tables

List of tables

Table 1. Signal Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Table 2. Pin Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Table 3. Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Table 4. Operating and AC Measurem ent Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Table 5. DC and AC Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Table 6. SOT23-3 – 3-lead Small Outline Trans istor Pack age Mecha nical Data . . . . . . . . . . . . . . . 18

Table 7. SOT323-3 (SC70-3) – 3-lead Small Outline Transistor Package Mechani cal Data . . . . . . 19

Table 8. Ordering Information Scheme. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 9. Factory-Trimmed Thresholds with Marking Description . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 10. Document Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

3/23

List of figures STM1061

List of figures

Figure 1. Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2. Logic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 3. SOT23-3 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 4. SOT323-3 (SC70-3) Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 5. N-Channel Open Drain Output Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 6. STM1061N Active-Low, Open Drain Hardware Hookup. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 7. Supply Current vs. Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 8. Supply Current vs. Ambient Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 9. Output Detect Delay Time vs. Ambient Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 10. Output Release Delay Time vs. Ambient Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 11. Maximum Transient Duration vs. Reset Threshold Overdrive . . . . . . . . . . . . . . . . . . . . . . 11

Figure 12. Detect, Release Voltage vs. Ambient Temperature for V
Figure 13. N-channel Driver Output Current vs. V

Figure 14. N-channel Driver Output Current vs. Input Voltage for VDS = 0.5V . . . . . . . . . . . . . . . . . . 12

Figure 15. AC Testing Input/Output Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 16. Voltage Timing Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 17. SOT23-3 – 3-lead Small Outline Transistor Package Outline. . . . . . . . . . . . . . . . . . . . . . . 17

Figure 18. SOT323-3 (SC70-3) – 3-lead Small Outline Transistor Package Outline. . . . . . . . . . . . . . 19

DS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

= 3.4V . . . . . . . . . . . . . . . . . 11

TH–

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STM1061 Summary Description

1 Summary Description

The STM1061 low power voltage detector provides monitoring of battery , power-supply, and
regulated system voltages. A precision voltage reference and comparator monitors the V
input and compares it with a specified voltage threshold condition. When V
specified trip point threshold, the output (OUT
as the V

input remains below V

CC

+ hysteresis (V

TH–

guaranteed to output the correct logic state for V
ignore fast transients on V

CC

.

) is forced low and remains asserted as long

). The STM1061 device is

HYST

down to 0.7V. They are also designed to

CC

falls below a

CC

This small, low power device is ideal for portable applications and is availab le in space­saving SOT23-3 and SOT323-3 (SC70-3) packages.

Figure 2. Logic Diagram

V

CC

CC

Table 1. Signal Names

OUT Open Drain Active-Low Output

V

CC

V

SS

Supply Voltage
Ground

Figure 3. SOT23-3 Connections

OUT
V

STM1061

V

SS

SS

OUT

AI10477

1
2

V

3

CC

AI10478

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Summary Description STM1061

Figure 4. SOT323-3 (SC70-3) Connections

V

SS

OUT

1
2

V

3

CC

AI10479

Figure 5. N- Cha n ne l Open Drain Outp ut B lo ck Diag ra m

V

CC

R1

+
–

V

R2

R3

REF

OUT

V

SS

Figure 6. STM1061N Active-Low, Open Drain Hardware Hookup

DC/DC

Converter

OUT

OUT

Regulated 3V

R

V

OUT

V

MCU

Suspend

V

CC

SS

3.6V

V

IN

+

(Open Drain)

V

CC

V

V

SS

STM1061N

V

SS

AI10482

AI10484a

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STM1061 Pin Descriptions

2 Pin Descriptions

See Figure 2 on page 5 and Table 1 on page 5 for a brief overview of the signals connected
to this device.

2.1 OUT (Open Drain)

This is the Open Drain Output. It goes low when VCC drops below V
long as V

2.2 V

This is the Supply voltage and input for the Voltage Detector.

2.3 V

Ground, VSS, is the reference for the power supply. It must be connected to the system
ground.

T able 2. Pin Functions

is below V

CC

TH–

+ V

HYST

.

CC

SS

Pin

SOT23-3

1 2 OUT Active-Low Open Drain Output
33V
21V

SOT323-3

(SC70-3)

Name Function

Supply Voltage

CC

Ground

SS

, and remains low as

TH–

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