STM6321LAWY6F STMICROELECTRONICS [STMicroelectronics], STM6321LAWY6F Datasheet
STM6321LAWY6F
Related parts for STM6321LAWY6F
STM6321LAWY6F Summary of contents
Page 1
Features ■ Precision V monitoring power supplies ■ RST outputs (active-low, push-pull or open drain) ■ RST outputs (active-high, push-pull) ■ Reset pulse width ...
Page 2
Contents 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 3
List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 4
List of figures Figure 1. Logic diagram (STM6821/6822/6823 ...
Page 5
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 of ...
Page 6
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 ...
Page 7
Pin descriptions 1.1.1 Active-low, push-pull reset output (RST) - STM6822/6823/6824/6825 Pulses low when triggered, and stays low whenever V when logic low. It remains low for t threshold, the watchdog triggers a reset goes ...
Page 8
Figure 7. Block diagram (STM6821/6822/6823) WDI Push-pull for STM6823, open drain for STM6822. 2. Active-high (push-pull) for STM6821. Figure 8. Block diagram (STM6321/6824) WDI Active-low (open drain) for STM6321, active-low (push-pull) for STM6824. ...
Page 9
Figure 10. Hardware hookup V 0.1μF From Microprocessor Push-button 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 STM6XXX (1) WDI (2) MR (3) RST (RST) ...
Page 10
Operation 2.1 Reset output The STM6xxx Supervisor asserts a reset signal to the MCU whenever V reset threshold (V RST (MR) is taken low. Reset is guaranteed valid for V to 85°C. During power-up, once V for the reset ...
Page 11
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 ...
Page 12
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 pins ...
Page 13
Typical operating characteristics Figure 15. V -to-reset output delay vs. temperature –40 Figure 16. Supply current vs. temperature –40 – ...
Page 14
Figure 17. MR-to-reset output delay vs. temperature 600 500 400 300 200 100 0 –40 Figure 18. Normalized power-up t 1.05 1.04 1.03 1.02 1.01 1.00 0.99 14/28 – Temperature (˚C) vs. temperature rec –40 – ...
Page 15
Figure 19. Normalized reset threshold voltage vs. temperature 1.05 1.04 1.03 1.02 1.01 1.00 0.99 0.98 0.97 0.96 0.95 –40 –20 Figure 20. Normalized power-up watchdog time-out period 1.05 1.04 1.03 1.02 1.01 1.00 0.99 –40 – ...
Page 16
Figure 21. Voltage output low vs. I 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00 0 Figure 22. Voltage output high vs. I 2.92 2.90 2.88 2.86 2.84 2.82 2.80 2.78 2.76 2.74 0.0 0.1 16/28 SINK ...
Page 17
Figure 23. Maximum transient duration vs. reset threshold overdrive 100 120 140 160 Reset Threshold Overdrive (mV 180 200 AI09637a 17/28 ...
Page 18
Maximum ratings Stressing the device above the rating listed in device. 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 ...
Page 19
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 ...
Page 20
Table 6. DC and AC characteristic Alter- Sym Description native V Operating voltage CC V supply current CC (MR and WDI unconnected supply current CC (MR unconnected; STM6322/6825) Input leakage current I Input leakage current LI (3) ...
Page 21
Table 6. DC and AC characteristic (continued) Alter- Sym Description 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
Table 6. DC and AC characteristic (continued) Alter- Sym Description native Reset threshold temperature coefficient Push-button Reset Input pulse width MLMH RST output delay MLRL MRD MR glitch immunity MR pull-up resistor ...
Page 23
Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK packages. These packages have a Lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner ...
Page 24
Table 7. SOT23-5 – 5-lead small outline transistor package mechanical data Symb Typ A 1. 1.05 B 0.40 C 0.15 D 2.90 D1 1.90 E 2.80 e 0. 0.35 24/28 mm Min Max Typ ...
Page 25
Part numbering Table 8. 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 RST S: ...
Page 26
Table 9. 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 STM6824LWY6F STM6824MWY6F STM6824TWY6F ...
Page 27
Revision history Table 10. 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 Revision 1 First draft 2 Update characteristics (Figure 3 Document promoted to Datasheet status 4 Package marking update Update characteristics, Lead-free text, availability ...
Page 28
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 ...