STM690A STMicroelectronics, STM690A Datasheet

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... STM704 ✓ STM802L/M ✓ STM805L ✓ STM817L/M ✓ STM818L/M STM819L/M 1. All RST and RST outputs are push-pull. August 2010 STM690A, STM692A, STM703 5 V supervisor with battery switchover 1. Contact local ST sales office for availability. Manual Active- reset (1) RST high RST (1) input ✓ ...

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... Power-fail input/output (NOT available on STM818 2.9 Applications information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2.10 Using a SuperCap™ backup power source . . . . . . . . . . . . . . . . . . . 17 2.11 Negative-going V 2.12 Battery freshness seal (STM817/818/819 Typical operating characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 2/43 STM690A/692A/703/704/802/805/817/818/819 WDI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 RST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 RST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 V OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 V BAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 PFI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 PFO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 transients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 CC ...

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... STM690A/692A/703/704/802/805/817/818/819 6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 7 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Doc ID 10522 Rev 10 Contents 3/43 ...

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... Table 8. SO8 - 8-lead plastic small outline, 150 mils body width, package mechanical data . . . . . . 38 Table 9. TSSOP8 - 8-lead, thin shrink small outline body size, mechanical data . . . . . . 39 Table 10. Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Table 11. Marking description Table 12. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 4/43 STM690A/692A/703/704/802/805/817/818/819 Doc ID 10522 Rev 10 ...

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... STM690A/692A/703/704/802/805/817/818/819 List of figures Figure 1. Logic diagram (STM690A/692/802/805/817 Figure 2. Logic diagram (STM703/704/819 Figure 3. Logic diagram (STM818 Figure 4. STM690A/692A/802/805/817 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 5. STM703/704/819 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 6. STM818 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 7. Block diagram (STM690A/692A/802/805/817 Figure 8. Block diagram (STM703/704/819 Figure 9. Block diagram (STM818 Figure 10. Hardware hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Figure 11. ...

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... Description 1 Description The STM690A/692A/703/704/802/805/817/818/819 supervisors are self-contained devices which provide microprocessor supervisory functions with the ability to non-volatize and write-protect external LPSRAM. A precision voltage reference and comparator monitors the V input for an out-of-tolerance condition. When an invalid V CC output (RST) is forced low (or high in the case of RST). These devices also offer a watchdog timer (except for STM703/704/819) as well as a power-fail comparator (except for STM818) to provide the system with an early warning of impending power failure ...

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... E (1) E CON V OUT BAT PFI PFO STM818 Figure 4. STM690A/692A/802/805/817 connections 1. For STM805, reset output is active-high BAT WDI STM818 Push-button reset input Watchdog input Active-low reset output Active-high reset outpu Chip-enable input Conditioned chip-enable output Supply voltage output ...

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... logic low. It remains low for t threshold, the watchdog triggers a reset goes from low to high. 1.1.4 RST Pulses high for t rec threshold or when logic high. It remains high for t reset threshold, the watchdog triggers a reset goes from high to low. 8/43 STM690A/692A/703/704/802/805/817/818/819 SO8/TSSOP8 V 1 OUT ...

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... STM690A/692A/703/704/802/805/817/818/819 1.1.5 V OUT When V is above the switchover voltage (V CC channel MOSFET switch. When V 1.1.6 V BAT When V falls below V CC hysteresis, V OUT used. 1.1.7 E The input to the chip-enable gating circuit. Connect to ground if unused. 1.1.8 E CON E goes low only when E is low and reset is not asserted ...

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... Pin description Pin STM690A STM692A STM818 STM802 STM817 - - Figure 7. Block diagram (STM690A/692A/802/805/817 BAT WDI PFI 1. For STM805, reset output is active-high. 10/43 STM690A/692A/703/704/802/805/817/818/819 STM703 Name STM704 STM805 STM819 WDI 7 - RST - 7 RST OUT 2 ...

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... STM690A/692A/703/704/802/805/817/818/819 Figure 8. Block diagram (STM703/704/819 BAT MR PFI Figure 9. Block diagram (STM818 BAT RST WDI E COMPARE V SO COMPARE V RST V COMPARE PFI COMPARE COMPARE t rec WATCHDOG Generator TIMER E OUTPUT CON CONTROL Doc ID 10522 Rev 10 Description V OUT t rec RST Generator PFO ...

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... Description Figure 10. Hardware hookup Regulator Unregulated V Voltage IN From Microprocessor For STM690A/692A/802/805/817/818. 2. For STM818 only. 3. Not available on STM818. 4. For STM703/704/819. 5. Active high on STM805. 12/43 STM690A/692A/703/704/802/805/817/818/819 OUT STM690A/692A/ 703/704/802/805/ 0.1 F 817/818/819 (1) WDI (2) ( CON (3) (3) PFI PFO (5) (4) MR RST Push-Button V BAT ...

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... STM690A/692A/703/704/802/805/817/818/819 2 Operation 2.1 Reset output The STM690A/692A/703/704/802/805/817/818/819 Supervisor asserts a reset signal to the MCU whenever V when the Push-button Reset Input (MR) is taken low. RST is guaranteed logic low (logic high for STM805) for 0V < V battery, RST is guaranteed valid down to V During power-up, once V ...

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... PFI PFO E E CON WDI MR RST RST V BAT 14/43 STM690A/692A/703/704/802/805/817/818/819 . With a backup battery installed with voltage V OUT CC Section 2.12. If the backup battery is not used, connect both V is the lesser of V and V BAT RST for as long as possible before switching over thereby maximizing the CC ensures that battery backup mode is entered ...

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... STM690A/692A/703/704/802/805/817/818/819 2.5 Chip-enable gating (STM818 only) Internal gating of the chip-enable (E) signal prevents erroneous data from corrupting the external CMOS RAM in the event of an undervoltage condition. The STM818 uses a series transmission gate from asserted), the E transmission gate is enabled and passes all E transitions. When reset is asserted, this path becomes disabled, preventing erroneous data from corrupting the CMOS RAM ...

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... V several milliseconds before the regulated V PFI STM690A/692A/703/704/802/805/817/818/819 Supervisor or before the microprocessor drops below the minimum operating voltage. This provides several milliseconds of advanced warning that power is about to fail. During battery backup, the power-fail comparator turns off and PFO goes (or remains) low ...

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... V RST V (or 2.4V) SO PFO (STM817/819) PFO follows PFI RST E (STM818) CON Figure 14. Power-fail comparator waveform (STM690A/692A/703/704/802/805 RST 2.4V ( PFO PFO follows PFI RST 2.10 Using a SuperCap™ backup power source SuperCaps™ are capacitors with extremely high capacitance values (e.g., 0.47 F) for their size ...

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... Operation 2.11 Negative-going V The STM690A/692A/703/704/802/805/817/818/819 Supervisors are relatively immune to negative-going V reset comparator overdrive (for which the STM690A/692A/703/704/802/805/817/818/819 will NOT generate a reset pulse). The graph was generated using a negative pulse applied starting indicated (comparator overdrive). The graph indicates the maximum pulse width a negative V transient can have without causing a reset pulse ...

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... STM690A/692A/703/704/802/805/817/818/819 2.12 Battery freshness seal (STM817/818/819) The battery freshness seal disconnects the backup battery from internal circuitry and V until it is needed. This allows an OEM to ensure that the backup battery connected to V will be fresh when the final product is put to use. To enable the freshness seal: 1 ...

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... Figure 18 on-resistance vs. temperature BAT OUT 160 140 120 100 –40 –20 20/43 STM690A/692A/703/704/802/805/817/818/819 = 25 ° Temperature (° Temperature (°C) Doc ID 10522 Rev 3. 4. 5.5V 80 100 120 AI10498 V BAT = 2.0V V BAT = 3.0V V BAT = 3.3V V BAT = 3.6V ...

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... STM690A/692A/703/704/802/805/817/818/819 Figure 19. Supply current vs. temperature (no load –40 –20 Figure 20. Battery current vs. temperature 1000 100 10 1 0.1 –40 – Temperature (°C) V BAT = 2.0V V BAT = 3.0V V BAT = 3. Temperature (°C) Doc ID 10522 Rev 10 Typical operating characteristics ...

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... Figure 22. Reset comparator propagation delay vs. temperature (other than STM817/818/819 –40 –20 22/43 STM690A/692A/703/704/802/805/817/818/819 Temperature (° Temperature (°C) Doc ID 10522 Rev 10 80 100 120 AI09142c 80 100 120 AI09143b ...

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... STM690A/692A/703/704/802/805/817/818/819 Figure 23. Reset comparator propagation delay vs. temperature (V 350 300 250 200 150 100 50 0 –40 –20 Figure 24. Power-up t vs. temperature REC 240 235 230 225 220 215 210 –40 – Temperature (° Temperature (°C) Doc ID 10522 Rev 10 Typical operating characteristics = 3.0 V ...

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... Typical operating characteristics Figure 25. Normalized reset threshold vs. temperature 1.004 1.002 1.000 0.998 0.996 –40 –20 Figure 26. Watchdog time-out period vs. temperature 1.90 1.85 1.80 1.75 1.70 1.65 1.60 –40 –20 24/43 STM690A/692A/703/704/802/805/817/818/819 Temperature (° Temperature (°C) Doc ID 10522 Rev 10 80 100 120 AI09145b 3. 4. 5.5V 80 ...

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... STM690A/692A/703/704/802/805/817/818/819 Figure 27 on-resistance vs. temperature CON –40 –20 Figure 28. PFI to PFO propagation delay vs. temperature 4.0 3.0 2.0 1.0 0.0 –40 – Temperature (° Temperature (°C) Doc ID 10522 Rev 10 Typical operating characteristics 100 5.5V ...

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... Typical operating characteristics Figure 29. Output voltage vs. load current (V 5.00 4.98 4.96 4. Figure 30. Output voltage vs. load current (V 2.80 2.78 2.76 2.74 2.72 2.70 2.68 2.66 0.0 26/43 STM690A/692A/703/704/802/805/817/818/819 = OUT (mA 0.2 0.4 0.6 I OUT (mA) Doc ID 10522 Rev °C) BAT 2 °C) BAT A 0.8 1.0 AI10496 AI10497 ...

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... STM690A/692A/703/704/802/805/817/818/819 Figure 31. RST output voltage vs. supply voltage Figure 32. RST output voltage vs. supply voltage Typical operating characteristics V RST V CC 500ms/div V RST V CC 500ms/div Doc ID 10522 Rev AI09149b AI09150b 27/43 ...

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... Typical operating characteristics Figure 33. RST response time (assertion RST Figure 34. RST response time (assertion 1V/div RST 1V/div 0V 28/43 STM690A/692A/703/704/802/805/817/818/819 5µs/div 5µs/div Doc ID 10522 Rev 10 1V/div 4V 4V 1V/div 0V AI09151b AI09152b ...

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... STM690A/692A/703/704/802/805/817/818/819 Figure 35. Power-fail comparator response time (assertion) 5V PFO 1.3V PFI Figure 36. Power-fail comparator response time (de-assertion) PFO 0V PFI 0V Typical operating characteristics 500ns/div 500ns/div Doc ID 10522 Rev 10 1V/div 0V 500mV/div 0V AI09153b 5V 1V/div 1.3V 500mV/div AI09154b 29/43 ...

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... Figure 38 propagation delay vs. temperature CON 4.0 3.0 2.0 1.0 0.0 –40 –20 30/43 STM690A/692A/703/704/802/805/817/818/819 Reset occurs above the curve Reset Comparator Overdrive, V RST Temperature (°C) Doc ID 10522 Rev 10 1 – 5.5V ...

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... STM690A/692A/703/704/802/805/817/818/819 4 Maximum ratings Stressing the device above the rating listed in the absolute maximum ratings table 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 the operating sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability ...

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... Input rise and fall times Input pulse voltages Input and output timing ref. voltages Figure 39 includes load capacitance and scope probe capacitance. L 32/43 STM690A/692A/703/704/802/805/817/818/819 conditions. Designers should check that the STM690A/692A/703/704/802/805/ Parameter ) A propagation delay test circuit CON ...

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... STM690A/692A/703/704/802/805/817/818/819 Figure 40. AC testing input/output waveforms Figure 41. MR timing waveform MR t MLRL (1) RST 1. RST for STM805. Figure 42. Watchdog timing V CC RST WDI 0. rec t MLMH t rec Doc ID 10522 Rev 10 DC and AC parameters 0.7V CC 0.3V CC AI02568 AI07837a t WD AI07891 33/43 ...

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... Input high voltage (WDI Input low voltage (MR Input low voltage (WDI) IL Output low voltage (PFO, RST, RST Output low voltage (E ) CON V Output low voltage (RST) OL 34/43 STM690A/692A/703/704/802/805/817/818/819 (1) Test condition T = –40 to +85 °C A Excluding I (V < 5.5 V) OUT CC Excluding 2.3 V, OUT BAT ...

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... BAT All other PFI falling versions ( STM802 PFO V RST Power-down (7)(8) V RST V RST Power-up V RST STM690A/703, STM8XXL (9) STM692A/704, STM8XXM STM817/818/819 Doc ID 10522 Rev 10 DC and AC parameters Min Typ 2 1.2 V, 0.8V BAT 0.8V BAT 1.20 1.25 1.225 1.250 2 0.1 0.75 > V ...

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... When V > V > BAT CC RST OUT 8. When V > V > RST CC BAT OUT 9. For V falling. CC 36/43 STM690A/692A/703/704/802/805/817/818/819 Test condition STM703/704 STM819 STM703/704 STM819 STM819 (max) < V RST CC V (max) < V RST (max) ...

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... STM690A/692A/703/704/802/805/817/818/819 6 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 10522 Rev 10 Package mechanical data ® ...

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... Figure 43. SO8 - 8-lead plastic small outline, 150 mils body width, package mechanical drawing A2 B Note: Drawing is not to scale. Table 8. SO8 - 8-lead plastic small outline, 150 mils body width, package mechanical data Symbol Typ ddd 38/43 STM690A/692A/703/704/802/805/817/818/819 A ddd Min Max - 1.35 1.75 - 0.10 0.25 - 0.33 0.51 - 0.19 0. ...

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... STM690A/692A/703/704/802/805/817/818/819 Figure 44. TSSOP8 - 8-lead, thin shrink small outline body size, outline A CP Note: Drawing is not to scale. Table 9. TSSOP8 - 8-lead, thin shrink small outline body size, mechanical data Symbol Typ 0. 3.00 e 0.65 E 4.90 E1 3.00 L 0. ...

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... Part numbering 7 Part numbering Table 10. Ordering information scheme Example: Device type STM690A/692A/703/704/802/805/817/818/819 Threshold voltage STM690A, STM703: blank: V STM692A, STM704: blank: V STM8xx RST M: V RST Package M = SO8 ( TSSOP8 Temperature range 6: –40 ° °C Shipping method ® ECOPACK package, tubes ® ...

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... STM690A/692A/703/704/802/805/817/818/819 Table 11. Marking description Part number STM690A STM692A STM703 STM704 STM802L STM802M STM805L STM817L STM817M STM818L STM818M STM819L STM819M Reset threshold Package 4.65 V SO8 4.40 V SO8 4.65 V SO8 4.40 V SO8 4.65 V SO8 4.40 V SO8 4.65 V SO8 SO8 4.65 V TSSOP8 SO8 4.40 V TSSOP8 SO8 4.65 V TSSOP8 SO8 4.40 V TSSOP8 SO8 4.65 V TSSOP8 SO8 4.40 V TSSOP8 ...

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... Revision Oct-2003 31-Oct-2003 22-Dec-2003 16-Jan-2004 08-Apr-2004 25-May-2004 05-Jul-2004 29-Sep-2004 01-Mar-2005 20-Jan-2006 21-Oct-2008 20-Nov-2009 18-Aug-2010 42/43 STM690A/692A/703/704/802/805/817/818/819 1 Initial release. 1.1 Update DC characteristics Reformatted; updated characteristics (cover page, 2 10, 11, 12, 13, 14, 16, Table Add typical characteristics 2.1 32, 33, 34, 35, 36, 37, 38). 2.2 Update characteristics (Figure Remove references to “open drain” (cover page ...

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... STM690A/692A/703/704/802/805/817/818/819 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. ...