Datasheet
Table Of Contents
- Table 1. Device summary
- 1 Description
- Figure 1. Logic diagram (STM6821/6822/6823)
- Figure 2. Logic diagram (STM6321/6322/6824/6825)
- Table 2. Signal names
- Figure 3. STM6822/6823 SOT23-5 connections
- Figure 4. STM6821 SOT23-5 connections
- Figure 5. STM6322/6825 SOT23-5 connections
- Figure 6. STM6321/6824 SOT23-5 connections
- 1.1 Pin descriptions
- 2 Operation
- 3 Typical operating characteristics
- Figure 15. VCC-to-reset output delay vs. temperature
- Figure 16. Supply current vs. temperature
- Figure 17. MR-to-reset output delay vs. temperature
- Figure 18. Normalized power-up trec vs. temperature
- Figure 19. Normalized reset threshold voltage vs. temperature
- Figure 20. Normalized power-up watchdog timeout period
- Figure 21. Voltage output low vs. ISINK
- Figure 22. Voltage output high vs. ISOURCE
- Figure 23. Maximum transient duration vs. reset threshold overdrive
- 4 Maximum ratings
- 5 DC and AC parameters
- 6 Package mechanical data
- 7 Package mechanical data
- 8 Part numbering
- 9 Revision history
Contents STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825
2/31 Doc ID 11110 Rev 12
Contents
1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1.1 Active low, push-pull reset output (RST) - 6823/6824/6825 . . . . . . . . . . . 7
1.1.2 Active low, open drain reset output (RST
) - STM6321/6322/6822 . . . . . . 7
1.1.3 Push-button reset input (MR
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1.4 Watchdog input (WDI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1.5 Active high reset output (RST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1 Reset output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 Open drain RST
output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3 Push-button reset input (STM6322/6821/6822/6823/6825) . . . . . . . . . . . 11
2.4 Watchdog input (STM6321/6821/6822/6823/6824) . . . . . . . . . . . . . . . . . 11
2.5 Applications information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.5.1 Watchdog input current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.5.2 Ensuring a valid reset output down to V
CC
= 0 V . . . . . . . . . . . . . . . . . . 11
2.6 Interfacing to microprocessors with bidirectional reset pins . . . . . . . . . . . 12
3 Typical operating characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5 DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30