STM818L/M STMicroelectronics, STM818L/M Datasheet

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... STM690A ✓ STM692A STM703 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 ...

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Contents Contents 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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

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List of tables List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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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 ...

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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 ...

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STM690A/692A/703/704/802/805/817/818/819 Figure 3. Logic diagram (STM818) Table 2. Signal names MR WDI RST RST (1) E (1) E CON V OUT BAT PFI PFO STM818 Figure 4. STM690A/692A/802/805/817 connections 1. For STM805, reset output ...

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Description Figure 5. STM703/704/819 connections Figure 6. STM818 connections 1.1 Pin descriptions 1.1 logic low on MR asserts the reset output. Reset remains asserted as long low and for t after MR returns high. This ...

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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. ...

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Description Table 3. Pin description Pin STM690A STM692A STM818 STM802 STM817 - - Figure 7. Block diagram (STM690A/692A/802/805/817) ...

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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 ...

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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 ...

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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 ...

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Operation 2.4 Backup battery switchover In the event of a power failure, it may be necessary to preserve the contents of external SRAM through V automatically switch the SRAM to the backup supply when V Note: When the battery is ...

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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 ...

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Operation Figure 12. Chip-enable waveform RST V BAT E CON RST E 2.8 Power-fail input/output (NOT available on STM818) The Power-fail Input (PFI) is compared to an internal reference voltage (independent from the V comparator). If PFI ...

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STM690A/692A/703/704/802/805/817/818/819 Figure 13. Power-fail comparator waveform (STM817/818/819 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 ...

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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 at ...

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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 ...

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Typical operating characteristics 3 Typical operating characteristics Note: Typical values are at T Figure 17 on-resistance vs. temperature CC OUT 5.0 4.0 3.0 2.0 1.0 0.0 –40 –20 Figure 18 on-resistance vs. temperature BAT ...

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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 ...

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Typical operating characteristics Figure 21. V threshold vs. temperature PFI 1.270 1.265 3.0V 1.260 4. 4.75V 1.255 5.5V 1.250 1.245 1.240 1.235 1.230 1.225 –40 –20 Figure 22. ...

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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 – ...

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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 ...

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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 (°C) ...

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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 = ...

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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 ...

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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 ...

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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 ...

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Typical operating characteristics Figure 37. Maximum transient duration vs. reset threshold overdrive 6000 5000 4000 3000 2000 1000 Figure 38 propagation delay vs. temperature CON 4.0 3.0 2.0 1.0 0.0 –40 ...

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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 ...

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DC and AC parameters 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 ...

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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 ...

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DC and AC parameters Table 7. DC and AC characteristics Alter- Sym Description native Operating voltage (2) V BAT V supply current supply current battery backup mode V supply current in ...

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STM690A/692A/703/704/802/805/817/818/819 Table 7. DC and AC characteristics (continued) Alter- Sym Description native Output high voltage (RST, RST) Output high voltage CON Output high voltage (PFO) V Output high voltage OH V battery backup OH (RST, RST) ...

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DC and AC parameters Table 7. DC and AC characteristics (continued) Alter- Sym Description native t RST pulse width REC Push-button reset input (STM703/704/819 pulse width MLMH RST output delay MLMR MRD ...

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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. ...

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Package mechanical data 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 ...

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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, ...

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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 ...

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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 ...

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Revision history 8 Revision history Table 12. Document revision history Date 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 ...

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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. ...