STM6510
Dual push-button Smart Reset
TM
with capacitor-adjustable delays
Features
■
Dual Smart Reset™ push-button inputs with
capacitor-adjustable extended reset setup
delay (t
SRC
)
Capacitor-adjustable reset pulse duration
(t
REC
)
Power-on reset
– RST active-low, open-drain
Factory-programmable thresholds to monitor
V
CC
in the range of 1.575 to 4.625 V typ.
Operating voltage 1.0 V (active-low output
valid) to 5.5 V
Low supply current (1.4 µA)
Operating temperature: industrial grade –40 °C
to +85 °C
TDFN8 package: 2 mm x 2 mm x 0.75 mm
RoHS compliant
TDFN8 (DG)
2 mm x 2 mm
■
■
■
■
■
■
■
■
Applications
■
■
■
■
■
■
Mobile phones, smartphones
e-books
MP3 players
Games
Portable navigation devices
Any application that requires delayed reset
push-button(s) response for improved system
stability
February 2010
Doc ID 16788 Rev 2
1/26
www.st.com
1
Contents
STM6510
Contents
1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1
1.2
1.3
Smart Reset™ devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
STM6510 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.3.1
1.3.2
1.3.3
1.3.4
1.3.5
1.3.6
Power supply (V
CC
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Ground (V
SS
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Smart Reset™ push-button inputs (SR0, SR1) . . . . . . . . . . . . . . . . . . . . 9
Adjustable delay of Smart Reset™ input (SRC pin) . . . . . . . . . . . . . . . . 9
Reset output (RST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Adjustable reset timeout (TREC
ADJ
pin) . . . . . . . . . . . . . . . . . . . . . . . . 10
2
3
4
5
6
7
8
Typical operating characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Package marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2/26
Doc ID 16788 Rev 2
STM6510
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.
Table 11.
Table 12.
Table 13.
Table 14.
Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
tSRC programmed by an ideal external capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
tREC programmed by an ideal external capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Operating and measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
DC and AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Possible VCC voltage thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
TDFN – 8-lead 2 x 2 x 0.75 mm, 0.5 mm pitch package mechanical data . . . . . . . . . . . . . 18
Parameter for landing pattern - TDFN – 8-lead 2 x 2 mm package . . . . . . . . . . . . . . . . . . 19
Carrier tape dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Reel dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Package marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Doc ID 16788 Rev 2
3/26
List of figures
STM6510
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.
Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Single-button Smart Reset™ typical hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Dual-button Smart Reset™ typical hookup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Timing waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Supply current (I
CC
) vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Smart Reset™ delay (t
SRC
) vs. temperature, C
SRC
= 0.56 µF . . . . . . . . . . . . . . . . . . . . . . 11
Reset timeout period (t
REC
) vs. temperature, C
tREC
= 0.01 µF . . . . . . . . . . . . . . . . . . . . . 12
Reset threshold (V
RST
) vs. temperature, “S” threshold option, V
CC
falling. . . . . . . . . . . . . 12
AC testing input/output waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
TDFN – 8-lead 2 x 2 x 0.75 mm, 0.5 mm pitch package outline . . . . . . . . . . . . . . . . . . . . . 18
Landing pattern - TDFN – 8-lead 2 x 2 mm without thermal pad . . . . . . . . . . . . . . . . . . . . 19
Carrier tape . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Reel dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Tape trailer/leader. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Pin 1 orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Package marking, top view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4/26
Doc ID 16788 Rev 2
STM6510
Description
1
1.1
Description
Smart Reset™ devices
The Smart Reset™ device family STM65xx provides a useful feature that ensures
inadvertent short reset push-button closures do not cause system resets. This is done by
implementing an extended Smart Reset™ input delay (t
SRC
). Once the valid Smart Reset™
input levels and setup delay are met, the device generates an output reset pulse with user-
programmable timeout period (t
REC
).
The typical application hookup shows that the dual Smart Reset™ inputs can be also
connected to the applications interrupt to allow the control of both the interrupt pin and the
hard reset functions. If the push-buttons are closed for a short time, the processor is only
interrupted. If the system still does not respond properly, holding the push-buttons for the
extended setup time (t
SRC
) causes a hard reset of the processor through the reset output.
The Smart Reset™ feature helps significantly increase system stability.
The STM65xx family of Smart Reset™ devices consists of low-current microprocessor reset
circuits targeted at applications such as MP3 players, portable navigation devices or mobile
phones, generally any application that requires delayed reset push-button(s) response for
improved system stability. The STM65xx devices feature single or dual Smart Reset™
inputs (SRx). The delayed Smart Reset™ setup time (t
SRC
) options are adjustable by
adding an external capacitor on the SRC pin or selectable by three-state logic. The delayed
setup period ignores switch closures shorter than t
SRC
, thus preventing undesired resets.
The STM65xx devices have active-low (optionally active-high) open-drain reset (RST)
output(s) with or without an internal pull-up resistor or push-pull as output options, with or
without the power-on reset function.
Some devices also have an undervoltage monitoring feature: the reset output is also
asserted when the monitored supply voltage V
CC
drops below the specified threshold. The
reset output remains asserted for the reset timeout period (t
REC
) after the monitored supply
voltage goes above the specified threshold.
1.2
STM6510
The STM6510 has two combined Smart Reset™ inputs (SR0 and SR1) with Smart Reset™
setup delay (t
SRC
) programmed by an external capacitor on the SRC pin. An additional
STM6510 feature is adjustable output reset pulse time t
REC
by adding an external capacitor
(C
tREC
).
Additionally, the V
CC
is monitored and if it drops below the selected V
RST
threshold, the
reset output goes active and remains active while V
CC
is below the V
RST
threshold, plus the
defined duration of the reset pulse t
REC
.
Doc ID 16788 Rev 2
5/26
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