STM6519
Single-pin, push button Smart Reset™
Datasheet
-
production data
Applications
•
Mobile phones, smartphones, PDAs
•
e-books
•
MP3 players
•
Games
UDFN6 1.00 mm x 1.45 mm
•
Portable navigation devices
•
Any application that requires delayed reset
push-button response for improved system
stability
Features
•
Operating voltage range 2 V to 5.5 V
•
Low supply current 1
μA
•
Integrated test mode
•
Single Smart Reset™ push-button input with
fixed extended reset setup delay (t
SRC
) from
0.5 s to 10 s in 0.5 s steps (typ.), option with
internal input pull-up resistor
•
Push-button controlled reset pulse duration
•
Option 1: fully push-button controlled, no fixed
or minimum pulse width guaranteed
•
Option 2: defined output reset pulse duration
(t
REC
), factory-programmed
•
Single reset output
•
Active-low or active-high
•
Push-pull or open drain with optional pull-up
resistor
•
Fixed Smart Reset input logic voltage levels
•
Operating temperature: -40 °C to 85 °C
•
UDFN6 package 1.00 mm x 1.45 mm
•
ECOPACK
®
2
(RoHS compliant, Halogen-Free)
June 2016
This is information on a product in full production.
DocID022111 Rev 7
1/23
www.st.com
Contents
STM6519
Contents
1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1
1.2
1.3
Test mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2
3
Device overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1
3.2
3.3
3.4
3.5
3.6
Power supply (V
CC
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Power-up sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Ground (V
SS
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Smart Reset input (SR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Reset output (RST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
RST output undervoltage behavior (for open-drain option) . . . . . . . . . . . . 8
4
5
6
7
8
9
Typical application diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Timing diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Typical operating characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
9.1
9.2
UDFN6 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Tape and reel information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
10
11
12
Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Package marking information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2/23
DocID022111 Rev 7
STM6519
List of tables
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Operating and measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
DC and AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
UDFN6 mechanical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Package marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
DocID022111 Rev 7
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3
List of figures
STM6519
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.
STM6519 logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
UDFN6 pin connections (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
STM6519 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Typical application diagram - input, output and STM6519 device in one voltage domain . . 9
Typical application diagram - STM6519 device in a different voltage domain than input
and output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Typical application diagram in different voltage domains - SR input in V
BAT
domain like
V
CC
totally disables the test mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
RST output without t
REC
option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
RST output with t
REC
option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Supply current (I
CC
) vs. temperature (T
A
). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Smart Reset delay (t
SRC
) vs. temperature (T
A
), t
SRC
= 4.0 s (typ.) . . . . . . . . . . . . . . . . . . 12
Test mode entry voltage (V
TEST
) vs. temperature (T
A
). . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Initial test mode time (t
SRC-INI
) vs. temperature (T
A
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
UDFN6 package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
UDFN6 recommended footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Carrier tape . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Pin 1 orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Package marking (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
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DocID022111 Rev 7
STM6519
Description
1
Description
The Smart Reset
TM
devices provide a useful feature which ensures that inadvertent short
reset push-button closures do not cause system resets. This is done by implementing an
extended Smart Reset input delay time (t
SRC
), which ensures a safe reset and eliminates
the need for a specific dedicated reset button.
This reset configuration provides versatility and allows the application to distinguish
between a software generated interrupt and a hard system reset. When the input push-
button is connected to the microcontroller interrupt input, and is closed for a short time, the
processor can only be interrupted. If the system still does not respond properly, continuing
to keep the push-buttons closed for the extended setup time t
SRC
causes a hard reset of the
processor through the reset output.
The STM6519 has one Smart Reset input (SR) with preset delayed Smart Reset setup time
(t
SRC
). The reset output (RST) is asserted after the Smart Reset input is held active for the
selected t
SRC
delay time. The RST output remains asserted either until the SR input goes to
inactive logic level (i.e. neither fixed nor minimum reset pulse width is set) or the output
reset pulse duration is fixed for t
REC
(i.e. factory-programmed). The device fully operates
over a broad V
CC
range from 2.0 V to 5.5 V.
1.1
Test mode
After pulling SR up to V
TEST
(V
CC
+ 1.4 V) or above, the counter starts to count the initial
shortened t
SRC-INI
(42 ms, typ.). After t
SRC-INI
expires, the RST output either goes down for
t
REC
(if t
REC
option is used) or stays low as long as overvoltage on SR is detected (if t
REC
option is not used). This is feedback, and the user only knows that the device is locked in
test mode. Each time the SR input is connected to ground in test mode, a shortened
t
SRC-SHORT
(t
SRC
/128) is used instead of regular t
SRC
(0.5 s - 10 s). In this way the device
can be quickly tested without repeating test mode triggering. Return to normal mode is
possible by performing a new startup of the device (i.e. V
CC
goes to 0 V and back to its
original state).
The advantages of this solution are its high glitch immunity, user feedback regarding entry
into test mode, and testability within the full V
CC
range.
DocID022111 Rev 7
5/23
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