STM6825 STMicroelectronics, STM6825 Datasheet

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STM6825

Manufacturer Part Number
STM6825
Description
Reset + Manual Reset
Manufacturer
STMicroelectronics
Datasheet

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Features
a.
Table 1.
July 2011
Part number
Precision V
power supplies
RST outputs (active-low, push-pull or open
drain)
RST outputs (active-high, push-pull)
Reset pulse width of 1.4 ms, 200 ms and
240 ms (typ)
Watchdog timeout period of 1.6 s (typ)
Manual reset input (MR)
Low supply current - 3 µA (typ)
Guaranteed RST (RST) assertion down to
V
Operating temperature: –40 to +85 °C
(industrial grade)
RoHS compliance
Lead-free components are compliant with the
RoHS directive
Other t
offered. Minimum order quantities may
apply. Contact local sales office for
availability.
STM6321
STM6322
STM6821
STM6822
STM6823
STM6824
STM6825
CC
= 1.0 V
rec
5-pin supervisor with watchdog timer and push-button reset
Device summary
and watchdog timings are
CC
(a)
monitoring of 5, 3.3, 3, or 2.5 V
Watchdog input
Manual reset
STM6821/6822/6823/6824/6825
input
(a)
Doc ID 11110 Rev 11
(push-pull)
Active-low
SOT23-5 (WY)
Reset output
Active-high
(push-pull)
STM6321/6322
(open drain)
Active-low
www.st.com
1/29
1

Related parts for STM6825

STM6825 Summary of contents

Page 1

... Contact local sales office for availability. Table 1. Device summary Part number Watchdog input ✔ STM6321 STM6322 ✔ STM6821 ✔ STM6822 ✔ STM6823 ✔ STM6824 STM6825 July 2011 STM6821/6822/6823/6824/6825 (a) Manual reset Active-low input (push-pull) ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ Doc ID 11110 Rev 11 ...

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Contents Contents 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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STM6321/6322STM6821/6822/6823/6824/6825 List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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List of figures List of figures Figure 1. Logic diagram (STM6821/6822/6823 ...

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STM6321/6322STM6821/6822/6823/6824/6825 1 Description The STM6xxx supervisors are self-contained devices which provide microprocessor supervisory functions. A precision voltage reference and comparator monitors the V for an out-of-tolerance condition. When an invalid V (RST) is forced low (or high in the case ...

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Description Figure 3. STM6822/6823 SOT23-5 connections 1. Open drain for STM6822. Figure 4. STM6821 SOT23-5 connections 1. Push-pull only. Figure 5. STM6322/6825 SOT23-5 connections 1. Open drain for STM6322. 2. Push-pull only. Figure 6. STM6321/6824 SOT23-5 connections 1. Open drain ...

Page 7

... Active-high reset output (RST) Active-high, push-pull reset output; inverse of RST. Table 3. Pin functions STM6822 STM6821 STM6823 — after either V rec after either V rec Pin STM6321 STM6322 STM6824 STM6825 — — — Doc ID 11110 Rev 11 Description ...

Page 8

... Push-pull for STM6823, open drain for STM6822. 2. Active-high (push-pull) for STM6821. Figure 8. Block diagram (STM6321/6824) 3. Active-low (open drain) for STM6321, active-low (push-pull) for STM6824. 4. Push-pull only. Figure 9. Block diagram (STM6322/6825) 1. Active-low (open drain) for STM6322, active-low (push-pull) for STM6825. 2. Push-pull only. 8/29 STM6321/6322STM6821/6822/6823/6824/6825 Doc ID 11110 Rev 11 ...

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STM6321/6322STM6821/6822/6823/6824/6825 Figure 10. Hardware hookup 1. For STM6321/6821/6822/6823/6824. 2. For STM6322/6821/6822/6823/6825. 3. For STM6821/ (RST output only). 4. For STM6321/6322/6824/6825 (both RST and RST outputs). Doc ID 11110 Rev 11 Description 9/29 ...

Page 10

Operation 2 Operation 2.1 Reset output The STM6xxx supervisor asserts a reset signal to the MCU whenever V reset threshold (V (MR) is taken low. Reset is guaranteed valid for °C. During power-up, once V the reset ...

Page 11

STM6321/6322STM6821/6822/6823/6824/6825 2.3 Push-button reset input (STM6322/6821/6822/6823/6825) A logic low on MR asserts reset. Reset remains asserted while MR is low, and for t Figure 25 on page resistor, allowing left open if not used. This input can ...

Page 12

Operation Figure 12. Ensuring RST valid to V Figure 13. Ensuring RST valid This configuration does not work on open drain outputs of the STM6321/6322/6822. 2.6 Interfacing to microprocessors with bidirectional reset pins Microprocessors with bidirectional reset ...

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STM6321/6322STM6821/6822/6823/6824/6825 3 Typical operating characteristics Figure 15 Figure 16. Supply current vs. temperature -to-reset output delay vs. temperature Doc ID 11110 Rev 11 Typical operating characteristics 13/29 ...

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Typical operating characteristics Figure 17. MR-to-reset output delay vs. temperature Figure 18. Normalized power-up t 14/29 STM6321/6322STM6821/6822/6823/6824/6825 vs. temperature rec Doc ID 11110 Rev 11 ...

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STM6321/6322STM6821/6822/6823/6824/6825 Figure 19. Normalized reset threshold voltage vs. temperature Figure 20. Normalized power-up watchdog timeout period Typical operating characteristics Doc ID 11110 Rev 11 15/29 ...

Page 16

Typical operating characteristics Figure 21. Voltage output low vs. I Figure 22. Voltage output high vs. I 16/29 STM6321/6322STM6821/6822/6823/6824/6825 SINK SOURCE Doc ID 11110 Rev 11 ...

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STM6321/6322STM6821/6822/6823/6824/6825 Figure 23. Maximum transient duration vs. reset threshold overdrive Typical operating characteristics Doc ID 11110 Rev 11 17/29 ...

Page 18

... These are stress ratings only and operation of the device at these or any other conditions above those indicated in the operating sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Refer also to the STMicroelectronics documents. Table 4. ...

Page 19

STM6321/6322STM6821/6822/6823/6824/6825 5 DC and AC parameters This section summarizes the operating measurement conditions, and the DC and AC characteristics of the device. The parameters in the DC and AC characteristics tables that follow, are derived from tests performed under the ...

Page 20

Package mechanical data 6 Package mechanical data Table 6. DC and AC characteristic Sym- Alter- Description bol native V Operating voltage CC V supply current CC (MR and WDI unconnected supply current CC (MR unconnected; STM6322/6825) Input ...

Page 21

STM6321/6322STM6821/6822/6823/6824/6825 Table 6. DC and AC characteristic (continued) Sym- Alter- Description bol native Output high voltage (RST Output high voltage (RST) Reset thresholds (5) V Reset threshold RST Reset threshold hysteresis V to RST delay CC (V – ...

Page 22

Package mechanical data Table 6. DC and AC characteristic (continued) Sym- Alter- Description bol native Reset threshold temperature coefficient Push-button reset input pulse width MLMH RST output delay MLRL MRD MR glitch ...

Page 23

STM6321/6322STM6821/6822/6823/6824/6825 7 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ...

Page 24

Package mechanical data Figure 27. SOT23-5 – 5-lead small outline transistor package mechanical drawing 1. Drawing is not to scale. Table 7. SOT23-5 – 5-lead small outline transistor package mechanical data Symbol ...

Page 25

STM6321/6322STM6821/6822/6823/6824/6825 Figure 28. Carrier tape for SOT23-5 package T TOP COVER TAPE K 0 Table 8. Carrier tape dimensions for SOT23-5 package Package 8.00 1.50 1.75 SOT23-5 +0.30 +0.10/ ±0.10 –0.10 –0. ...

Page 26

Part numbering 8 Part numbering Table 9. Ordering information scheme Example: Device type STM6xxx Reset threshold voltage 4.514 to 4.746 V RST 4.270 to 4.490 V RST 3.000 to 3.150 V ...

Page 27

... STM6823RWY6F STM6823ZWY6F STM6824LWY6F STM6824MWY6F STM6824TWY6F STM6824SWY6F STM6824RWY6F STM6825LWY6F STM6825MWY6F STM6825TWY6F STM6825SWY6F STM6825RWY6F 1. Where “x” = assembly work week (A to Z), such that “A” = WW01-02, “B” = WW03-04, and so forth. Reset threshold (V) Reset pulse width (ms) 4.630 4.390 4.390 3.080 2.930 2.630 4.630 4 ...

Page 28

Revision history 9 Revision history Table 11. Document revision history Date 25-Aug-2004 15-Dec-2004 10-Mar-2005 17-Jun-2005 11-Apr-2006 11-Aug-2006 25-May-2007 03-Jun-2008 09-Apr-2009 06-Jan-2011 14-Jul-2011 28/29 STM6321/6322STM6821/6822/6823/6824/6825 Revision 1 First draft 2 Update characteristics 3 Document promoted to Datasheet status 4 Package marking ...

Page 29

... STM6321/6322STM6821/6822/6823/6824/6825 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...

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