Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsPMICsPMIC - system monitor Reset/power-on reset SOT 23 5

Table Of Contents

This is information on a product in full production.

June 2012 Doc ID 11110 Rev 12 1/31

STM6321, STM6322, STM6821, STM6822,

STM6823, STM6824, STM6825

5-pin supervisor with watchdog timer and push-button reset

Datasheet − production data

Features

■ Precision V

monitoring of 5, 3.3, 3, or 2.5 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

= 1.0 V

■ Operating temperature: –40 to +85 °C

(industrial grade)

■ RoHS compliance

Lead-free components are compliant with the

RoHS directive

SOT23-5 (WY)

Table 1. Device summary

Part number Watchdog input

Manual reset

input

Reset output

Active low

(push-pull)

Active high

(push-pull)

Active low

(open drain)

STM6321 ✔✔✔

STM6322 ✔✔✔

STM6821 ✔✔ ✔

STM6822 ✔✔ ✔

STM6823 ✔✔✔

STM6824 ✔✔✔

STM6825 ✔✔✔

www.st.com

Summary of content (31 pages)

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STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 5-pin supervisor with watchdog timer and push-button reset Datasheet −production data Features ■ Precision VCC monitoring of 5, 3.3, 3, or 2.5 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.
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Contents STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 Contents 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 2 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.
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STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 List of tables List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Table 10. Table 11. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin functions . . . . . . . . . . . . . . . . .
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List of figures STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Figure 17. Figure 18. Figure 19. Figure 20. Figure 21. Figure 22. Figure 23. Figure 24. Figure 25. Figure 26. Figure 27. Figure 28. 4/31 Logic diagram (STM6821/6822/6823) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 1 Description Description The STM6xxx supervisors are self-contained devices which provide microprocessor supervisory functions. A precision voltage reference and comparator monitors the VCC input for an out-of-tolerance condition. When an invalid VCC condition occurs, the reset output (RST) is forced low (or high in the case of RST). These devices also offer a watchdog timer (except for STM6322/6825) and/or a push-button (MR) reset input.
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Description STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 Figure 3. STM6822/6823 SOT23-5 connections SOT23-5 RST(1) VSS MR 1 2 3 5 VCC 4 WDI AI09130a 1. Open drain for STM6822. Figure 4. STM6821 SOT23-5 connections SOT23-5 RST(1) VSS MR 1 2 3 VCC 5 WDI 4 AI12285 1. Push-pull only. Figure 5. STM6322/6825 SOT23-5 connections SOT23-5 RST(1) VSS RST(2) 1 2 3 5 VCC 4 MR AI09131a 1. Open drain for STM6322. 2. Push-pull only. Figure 6.
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STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 Description 1.1 Pin descriptions 1.1.1 Active low, push-pull reset output (RST) - 6823/6824/6825 Pulses low when triggered, and stays low whenever VCC is below the reset threshold or when MR is a logic low. It remains low for trec after either VCC rises above the reset threshold, the watchdog triggers a reset, or MR goes from low to high. 1.1.
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Description STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 Figure 7. Block diagram (STM6821/6822/6823) 7$) TRANSITIONAL DETECTOR 7$) 6## 6## 7!4#($/' 4)-%2 6234 #/-0!2% TREC GENERATOR 234 234 -2 !) 6 1. Push-pull for STM6823, open drain for STM6822. 2. Active high (push-pull) for STM6821. Figure 8. Block diagram (STM6321/6824) 7$) TRANSITIONAL DETECTOR 7$) 6## 7!4#($/' 4)-%2 6234 #/-0!2% TREC GENERATOR 234 234 ! 6 3.
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STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 Description Figure 10. Hardware hookup 6## 6## 34- 888 &ROM MICROPROCESSOR 7$) 0USH BUTTON -2 234 234 234 4O MICROPROCESSOR RESET 4O MICROPROCESSOR RESET !) 6 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).
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Operation STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 2 Operation 2.1 Reset output The STM6xxx supervisor asserts a reset signal to the MCU whenever VCC goes below the reset threshold (VRST), a watchdog timeout occurs, or when the push-button reset input (MR) is taken low. Reset is guaranteed valid for VCC < VRST down to VCC =1 V for TA = 0 to 85 °C. During power-up, once VCC exceeds the reset threshold an internal timer keeps reset low for the reset timeout period, trec.
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STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 2.3 Operation 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 trec (see Figure 25 on page 19) after it returns high. The MR input has an internal 52 kΩ pull-up resistor, allowing it to be left open if not used. This input can be driven with TTL/CMOS-logic levels or with open drain/collector outputs.
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Operation STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 Figure 12. Ensuring RST valid to VCC = 0, (active low push-pull outputs) STM6XXX VCC VCC GND RST R1 AI09138 Figure 13. Ensuring RST valid to VCC = 0, (active high, push-pull outputs) VCC STM6XXX R1 VCC GND RST AI09139 1. This configuration does not work on open drain outputs of the STM6321/6322/6822. 2.
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STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 Typical operating charac- 3 Typical operating characteristics Figure 15. VCC-to-reset output delay vs. temperature n n !) 6 Figure 16. Supply current vs.
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Typical operating characteristics STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, Figure 17. MR-to-reset output delay vs. temperature n n !) 6 Figure 18. Normalized power-up trec vs.
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STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 Typical operating characFigure 19. Normalized reset threshold voltage vs. temperature n n !) 6 Figure 20.
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Typical operating characteristics STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, Figure 21. Voltage output low vs. ISINK 6## 6 !) 6 Figure 22. Voltage output high vs.
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STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 Typical operating characFigure 23. Maximum transient duration vs.
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Maximum ratings 4 STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 Maximum ratings Stressing the device above the rating listed in Table 4: Absolute maximum ratings may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indicated in Table 5: Operating and AC measurement conditions of this specification is not implied.
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STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 5 DC and AC parameters DC and AC parameters This section summarizes the operating measurement conditions, and the DC and AC characteristics of the device. The parameters in Table 6: DC and AC characteristic, are derived from tests performed under the measurement conditions summarized in Table 5: Operating and AC measurement conditions.
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DC and AC parameters STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 Figure 26.
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STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 Package mechanical data 6 Package mechanical data Table 6. DC and AC characteristic Symbol VCC ICC ILI Alternative Description Test condition(1) Min. Typ. 1.2 (2) Operating voltage Max. Unit 5.5 V VCC supply current (MR and WDI unconnected) T/S/R/Z/Y (VCC < 3.6 V) 4 12 µA L/M (VCC < 5.5 V) 6 17 µA VCC supply current (MR unconnected; STM6322/6825) T/S/R/Z/Y (VCC < 3.6 V) 3 8 µA L/M (VCC < 5.
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Package mechanical data STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 Table 6. Symbol DC and AC characteristic (continued) Alternative Description Output high voltage (RST) VOH Output high voltage (RST) Test condition(1) Min. VCC ≥ 2.7 V, ISOURCE = 500 µA, Reset not asserted 0.8 VCC V VCC ≥ 4.5 V, ISOURCE = 800 µA , Reset not asserted 0.8 VCC V VCC ≥ 1.0 V, ISOURCE = 1 µA, Reset asserted (0 °C to 85 °C) 0.8 VCC V VCC ≥ 1.5 V, ISOURCE = 100 µA, Reset asserted 0.
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STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 Package mechanical data Table 6. Symbol DC and AC characteristic (continued) Alternative Description Test condition(1) Min. Reset threshold temperature coefficient Typ. Max. Unit ppm/ C 40 Push-button reset input tMLMH tMR MR pulse width tMLRL tMRD MR to RST output delay 500 ns MR glitch immunity 100 ns 1 µs MR pull-up resistor 35 52 75 kΩ Watchdog timeout period 1.12 1.60 2.
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Package mechanical data STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 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 is an ST trademark.
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STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 Package mechanical data Figure 27. SOT23-5 – 5-lead small outline transistor package mechanical drawing ! % E $ $ " ! + # ! #0 & , 3/4 1. Drawing is not to scale. Table 7. SOT23-5 – 5-lead small outline transistor package mechanical data Dimensions Symbol A mm inches Typ. Min. Max. Typ. Min. Max. 1.20 0.90 1.45 0.047 0.035 0.057 A1 0.15 0.006 A2 1.05 0.90 1.30 0.041 0.035 0.051 B 0.40 0.35 0.
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Package mechanical data STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 Figure 28. Carrier tape for SOT23-5 package P0 E P2 D T A0 F TOP COVER TAPE W B0 P1 CENTER LINES OF CAVITY K0 USER DIRECTION OF FEED AM03073v1 Table 8. Carrier tape dimensions for SOT23-5 package Package W D SOT23-5 8.00 +0.30 –0.10 1.50 +0.10/ –0.00 26/31 E P0 P2 F 1.75 4.00 2.00 3.50 ±0.10 ±0.10 ±0.10 ±0.05 A0 B0 K0 P1 3.23 ±0.10 3.17 ±0.10 1.37 ±0.10 4.00 ±0.
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STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 8 Part numbering Part numbering Table 9. Ordering information scheme Example: STM6xxx L WY 6 E Device type STM6xxx Reset threshold voltage L: VRST = 4.514 to 4.746 V M: VRST = 4.270 to 4.490 V T: VRST = 3.000 to 3.150 V S: VRST = 2.850 to 3.000 V R: VRST = 2.564 to 2.696 V Z: VRST = 2.243 to 2.358 V Y: VRST = 1.950 to 2.
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Part numbering STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 Table 10. 28/31 Marking description Part number Reset threshold (V) Reset pulse width (ms) Topside marking(1) STM6321LWY6F 4.630 200 5AU or 5AUx STM6321MAWY6F 4.390 1.4 5CR or 5CRx STM6321MWY6F 4.390 200 5AV or 5AVx STM6321TWY6F 3.080 200 5AW or 5AWx STM6321SWY6F 2.930 200 5AX or 5AXx STM6321RWY6F 2.630 200 5AY or 5AYx STM6322LWY6F 4.630 200 5BA or 5BAx STM6322MWY6F 4.
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STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 Table 10. Part numbering Marking description (continued) Part number Reset threshold (V) Reset pulse width (ms) Topside marking(1) STM6824SWY6F 2.930 200 5CD or 5CDx STM6824RWY6F 2.630 200 5CE or 5CEx STM6825LWY6F 4.630 200 5CG or 5CGx STM6825MWY6F 4.390 200 5CH or 5CHx STM6825TWY6F 3.080 200 5CJ or 5CJx STM6825SWY6F 2.930 200 5CK or 5CKx STM6825RWY6F 2.630 200 5CL or 5CLx 1.
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Revision history 9 STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 Revision history Table 11.
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STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 Please Read Carefully: 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.