STM6821 STMicroelectronics, STM6821 Datasheet
STM6821
Available stocks
Related parts for STM6821
STM6821 Summary of contents
Page 1
... 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 STM6321/6322 SOT23-5 (WY) ...
Page 2
... Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 8 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 2/29 STM6321/6322STM6821/6822/6823/6824/6825 Active-low, push-pull reset output (RST) - 6823/6824/6825 . . . . . . . . . . 7 Active-low, open drain reset output (RST) - STM6321/6322/6822 . . . . . 7 Push-button reset input (MR Watchdog input (WDI Active-high reset output (RST Watchdog input current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Ensuring a valid reset output down to V Doc ID 11110 Rev ...
Page 3
... STM6321/6322STM6821/6822/6823/6824/6825 List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Table 2. Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Table 3. Pin functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Table 4. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Table 5. Operating and AC measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Table 6. DC and AC characteristic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Table 7. SOT23-5 – 5-lead small outline transistor package mechanical data Table 8. Carrier tape dimensions for SOT23-5 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Table 9 ...
Page 4
... List of figures List of figures Figure 1. Logic diagram (STM6821/6822/6823 Figure 2. Logic diagram (STM6321/6322/6824/6825 Figure 3. STM6822/6823 SOT23-5 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 4. STM6821 SOT23-5 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 5. STM6322/6825 SOT23-5 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 6. STM6321/6824 SOT23-5 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 7. Block diagram (STM6821/6822/6823 Figure 8. Block diagram (STM6321/6824 Figure 9. Block diagram (STM6322/6825 Figure 10. ...
Page 5
... RST). These devices also offer a watchdog timer (except for STM6322/6825) and/or a push-button (MR) reset input. These devices are available in a standard 5-pin SOT23 package. Figure 1. Logic diagram (STM6821/6822/6823) 1. For STM6821 only. Figure 2. Logic diagram (STM6321/6322/6824/6825) 1. For STM6321/6824. Table 2. ...
Page 6
... 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 for STM6321. 2. Push-pull only. 6/29 STM6321/6322STM6821/6822/6823/6824/6825 SOT23 RST ...
Page 7
... The internal watchdog timer clears while reset is asserted or when WDI sees a rising or falling edge. The watchdog function CAN be disabled if WDI is left unconnected or is connected to a tri-state buffer output. 1.1.5 Active-high reset output (RST) Active-high, push-pull reset output; inverse of RST. Table 3. Pin functions STM6822 STM6821 STM6823 — after either V ...
Page 8
... Description Figure 7. Block diagram (STM6821/6822/6823) 1. 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. ...
Page 9
... 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
... A 10 kΩ pull-up resistor is sufficient in most applications. Figure 11. STM6321/6322/6822 open drain RST output with multiple supplies 1. STM6322/6822. 2. STM6321/6822. 3. STM6321/6322. 10/29 STM6321/6322STM6821/6822/6823/6824/6825 ), a watchdog timeout occurs, or when the push-button reset input RST exceeds the reset threshold an internal timer keeps reset low for CC . After this interval reset is de-asserted. rec Figure 11) ...
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 be driven with TTL/CMOS-logic levels or with open drain/collector outputs. Connect a normally open momentary switch from MR to GND to create a manual reset function ...
Page 12
... For example, if the reset output is driven high and the microprocessor wants to pull it low, signal contention will result. To prevent this from occurring, connect a 4.7 kΩ resistor between the reset output and the microprocessor’s reset I Figure Figure 14. Interfacing to microprocessors with bidirectional reset I/O 12/29 STM6321/6322STM6821/6822/6823/6824/6825 = 0, (active-low push-pull outputs) CC STM6XXX V CC GND ...
Page 13
... 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 ...
Page 14
... 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 ...
Page 15
... 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 ...
Page 17
... 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
... I Output current O P Power dissipation D 1. Reflow at peak temperature of 260 °C (total thermal budget not to exceed 245 °C for greater than 30 seconds). 18/29 STM6321/6322STM6821/6822/6823/6824/6825 Table 4 may cause permanent damage to the SURE Program and other relevant quality ™ Parameter off) CC Doc ID 11110 Rev 11 ...
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 measurement conditions summarized in Table 5. Designers should check that the operating conditions in their circuit match the operating conditions when relying on the quoted parameters ...
Page 20
... IH V Input high voltage (WDI Input low voltage (MR Input low voltage (WDI) IL Output low voltage (RST; push-pull or open drain Output low voltage (RST; push-pull only) 20/29 STM6321/6322STM6821/6822/6823/6824/6825 (1) Test condition T/S/R/Z/Y (V < 3 L/M (V < 5 T/S/R/Z/Y (V < 3 L/M (V < 5 ...
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 – 100 mV, V RST CC falling at 1 mV/µs) (6) t Reset pulse width ...
Page 22
... The leakage current measured on the RST pin is tested with the reset asserted (output high impedance). 6. Other t and watchdog timings are offered. Minimum order quantities may apply. Contact local sales office for availability. rec 7. For V < 3 (min) = 100 ns 22/29 STM6321/6322STM6821/6822/6823/6824/6825 (1) Test condition (7) ≥ 3 – ° 4.5 to 5.5 V for “L/M” versions ...
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. ® ECOPACK trademark. Doc ID 11110 Rev 11 Package mechanical data ® ...
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 24/29 STM6321/6322STM6821/6822/6823/6824/6825 mm Typ Min Max 1.20 0.90 1.45 0.15 1.05 0.90 1.30 0.40 0.35 0.50 0.15 0.09 0.20 2.90 2.80 3.00 1.90 2.80 2.60 3.00 0.95 1.60 1.50 1.75 0° 10° 0.35 0.10 0.60 Doc ID 11110 Rev 11 ...
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. CENTER LINES OF CAVITY USER DIRECTION OF FEED 4.00 2.00 3.50 3.23 3.17 ±0.10 ±0.10 ±0.05 ± ...
Page 26
... Contact local sales office for availability. Other t quantities may apply. Contact local sales office for availability. For other options, or for more information on any aspect of this device, please contact the ST sales office nearest you. 26/29 STM6321/6322STM6821/6822/6823/6824/6825 STM6xxx (1) and watchdog timings are offered. Minimum order rec ...
Page 27
... STM6321/6322STM6821/6822/6823/6824/6825 Table 10. Marking description Part number STM6321LWY6F STM6321MAWY6F STM6321MWY6F STM6321TWY6F STM6321SWY6F STM6321RWY6F STM6322LWY6F STM6322MWY6F STM6322TWY6F STM6322SWY6F STM6322RWY6F STM6821LWY6F STM6821MWY6F STM6821TWY6F STM6821SWY6F STM6821RWY6F STM6822LWY6F STM6822MWY6F STM6822TWY6F STM6822SWY6F STM6822RWY6F STM6822ZWY6F STM6822YWY6F STM6823LWY6F STM6823MWY6F STM6823TJWY6F STM6823TWY6F STM6823SJWY6F STM6823SWY6F STM6823RJWY6F STM6823RWY6F STM6823ZWY6F STM6824LWY6F STM6824MWY6F STM6824TWY6F ...
Page 28
... 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 update Update characteristics, Lead-free text, availability and 9; Table and 10) 6 ...
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. ...