STM1061
Low Power Voltage Detector
Features
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Figure 1.
Packages
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 OUT Assertion Down to V
CC
= 0.7V
Power Supply Transient Immunity
Available in SOT23-3 and SOT323-3 (SC70-3)
packages
Operating Temperature –40 to 85°C.
1. Contact local sales office for availability.
SOT323-3, SC70-3 (W)
(1)
SOT23-3 (WX)
July 2006
Rev 4
1/23
www.st.com
1
Contents
STM1061
Contents
1
2
Summary Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1
2.2
2.3
OUT (Open Drain) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
V
SS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1
3.2
Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Negative-Going V
CC
Transients and Undershoot . . . . . . . . . . . . . . . . . . . . 8
4
5
6
7
8
9
Typical Operating Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Maximum Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
DC and AC Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Package Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Part Numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2/23
STM1061
List of tables
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Signal Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Operating and AC Measurement Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
DC and AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
SOT23-3 – 3-lead Small Outline Transistor Package Mechanical Data . . . . . . . . . . . . . . . 18
SOT323-3 (SC70-3) – 3-lead Small Outline Transistor Package Mechanical Data . . . . . . 19
Ordering Information Scheme. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Factory-Trimmed Thresholds with Marking Description . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Document Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3/23
List of figures
STM1061
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Logic Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SOT23-3 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SOT323-3 (SC70-3) Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
N-Channel Open Drain Output Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
STM1061N Active-Low, Open Drain Hardware Hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Supply Current vs. Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Supply Current vs. Ambient Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Output Detect Delay Time vs. Ambient Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Output Release Delay Time vs. Ambient Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Maximum Transient Duration vs. Reset Threshold Overdrive . . . . . . . . . . . . . . . . . . . . . . 11
Detect, Release Voltage vs. Ambient Temperature for V
TH–
= 3.4V . . . . . . . . . . . . . . . . . 11
N-channel Driver Output Current vs. V
DS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
N-channel Driver Output Current vs. Input Voltage for V
DS
= 0.5V . . . . . . . . . . . . . . . . . . 12
AC Testing Input/Output Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Voltage Timing Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
SOT23-3 – 3-lead Small Outline Transistor Package Outline. . . . . . . . . . . . . . . . . . . . . . . 17
SOT323-3 (SC70-3) – 3-lead Small Outline Transistor Package Outline . . . . . . . . . . . . . . 19
4/23
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
CC
input and compares it with a specified voltage threshold condition. When V
CC
falls below a
specified trip point threshold, the output (OUT) is forced low and remains asserted as long
as the V
CC
input remains below V
TH–
+ hysteresis (V
HYST
). The STM1061 device is
guaranteed to output the correct logic state for V
CC
down to 0.7V. They are also designed to
ignore fast transients on V
CC
.
This small, low power device is ideal for portable applications and is available in space-
saving SOT23-3 and SOT323-3 (SC70-3) packages.
Figure 2.
Logic Diagram
V
CC
STM1061
OUT
V
SS
AI10477
Table 1.
OUT
V
CC
V
SS
Signal Names
Open Drain Active-Low Output
Supply Voltage
Ground
Figure 3.
SOT23-3 Connections
OUT
VSS
1
2
3
VCC
AI10478
5/23
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