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STM6315MDW13F

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21
List of figures STM6315
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List of figures
Figure 1. Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. SOT143-4 connections (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 3. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 4. Hardware hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 5. Reset timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 6. Manual reset timing diagram, switch bounce/debounce. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 7. Supply current vs. supply voltage, V
RST
= 2.63V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 8. Supply current vs. temperature (no load), V
RST
= 2.63V . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 9. RST
output voltage vs. output current, V
CC
= 4.25V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 10. Normalized reset time-out period vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 11. Normalized reset threshold vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 12. Max. transient duration not causing reset pulse vs. reset threshold Overdrive . . . . . . . . . 11
Figure 13. AC testing input/output waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 14. SOT143-4 – 4-lead small outline transistor package outline . . . . . . . . . . . . . . . . . . . . . . . 17
STM6315 Summary description
5/21
1 Summary description
The STM6315 Microprocessor Reset Circuit is a low power supervisory device used to
monitor power supplies. It performs a single function: asserting a reset signal whenever the
V
CC
supply voltage drops below a preset value and keeping it asserted until V
CC
has risen
above the preset threshold for a minimum period of time (t
rec
). It also provides a manual
reset input (MR
). The open drain RST output can be pulled up to a voltage higher than V
CC
,
but less than 6V.
The STM6315 comes with standard factory-trimmed reset thresholds of 2.63V, 2.93V,
3.08V, 4.38V, and 4.63V. The STM6315 is available in the SOT143-4 package.
Figure 1. Logic diagram
Figure 2. SOT143-4 connections (top view)
Table 1. Signal names
Symbol Description
V
CC
Supply voltage
MR
Manual reset input
RST
Active-low open drain reset output
V
SS
Ground
AI11162
V
CC
STM6315
V
SS
RST
MR
1
RST
V
CC
V
SS
AI11163
2
3
4
MR
Summary description STM6315
6/21
Figure 3. Block diagram
Figure 4. Hardware hookup
1. Open drain RST output requires external pull-up resistor.
AI11164
V
RST
RST
COMPARE
t
rec
Generator
V
CC
MR
DEBOUNCE
AI11165
V
CC
V
CC
MR
STM6315 MCU
RST
(1)
RESET
Input
10k
V
CC
V
SS
V
SS
Manual
Reset
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21

STM6315MDW13F

Mfr. #:
Buy STM6315MDW13F
Manufacturer:
STMicroelectronics
Description:
Supervisory Circuits Open Drain Microprocessor Reset
Lifecycle:
New from this manufacturer.
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