STM690 STMicroelectronics, STM690 Datasheet

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... STM704T/S/R STM795T/S/R STM802T/S/R STM804T/S/R STM805T/S/R STM806T/S/R Note: 1. All RST outputs push-pull (unless otherwise noted) 2. Open drain output. * Contact local ST sales office for availability. April 2006 STM690, STM704, STM795 3V Supervisor with Battery Switchover Figure 1. Packages Active- Active- Manual High (1) Reset Input RST ...

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... STM690/704/795/802/804/805/806 TABLE OF CONTENTS FEATURES SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Figure 1. Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Table 1. Device Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 SUMMARY DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Figure 2. Logic Diagram (STM690/802/804/805 Figure 3. Logic Diagram (STM704/806 Figure 4. Logic Diagram (STM795 Table 2. Signal Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Figure 5. STM690/802/804/805 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 6. STM704/806 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 7. STM795 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 3. Pin Description Figure 8 ...

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... Figure 40.TSSOP8 – 8-lead, Thin Shrink Small Outline, 3x3mm body size, Outline . . . . . . . . . . . 28 Table 9. TSSOP8 – 8-lead, Thin Shrink Small Outline, 3x3mm body size, Mechanical Data . . . . 28 PART NUMBERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Table 10. Ordering Information Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Table 11. Marking Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 REVISION HISTORY Table 12. Document Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 STM690/704/795/802/804/805/806 = 5V 2.8V 25°C BAT ...

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... LPSRAM. A precision voltage reference and com- parator monitors the V input for an out-of-toler- CC ance condition. When an invalid V occurs, the reset output (RST) is forced low (or high in the case of RST). These devices also offer Figure 2. Logic Diagram (STM690/802/804/805 BAT WDI STM690/ 802/804/ ...

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... Figure 5. STM690/802/804/805 Connections SO8/TSSOP8 OUT PFI 4 5 Note: 1. For STM804/805, reset output is active-high and open drain. Figure 6. STM704/806 Connections V BAT (1) RST(RST) WDI PFO AI08849 Figure 7. STM795 Connections STM690/704/795/802/804/805/806 SO8/TSSOP8 OUT BAT V RST ...

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... MR goes from high to low. PFI (Power-fail Input). When PFI is less than V or when V falls below V PFI CC goes low; otherwise, PFO remains high. Connect to ground if unused. Table 3. Pin Description Pin STM690 STM704 STM795 STM802 STM806 – – 6 – 6 – ...

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... Figure 8. Block Diagram (STM690/802/804/805 BAT WDI PFI Note: 1. For STM804/805, reset output is active-high and open drain. Figure 9. Block Diagram (STM704/806 BAT MR PFI V COMPARE SO COMPARE V RST WATCHDOG TIMER V COMPARE PFI COMPARE V SO COMPARE V RST V COMPARE PFI STM690/704/795/802/804/805/806 V OUT t rec (1) RST(RST) ...

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... STM690/704/795/802/804/805/806 Figure 10. Block Diagram (STM795 BAT E PFI Figure 11. Hardware Hookup Regulator Unregulated V Voltage IN From Microprocessor R1 R2 Note: 1. For STM690/802/804/805. 2. For STM795 only. 3. Not available on STM795. 4. For STM704/806. 8/32 V COMPARE SO COMPARE V RST E OUTPUT CON CONTROL V COMPARE PFI V CCSW STM690/704/ 0.1 F 795/802/804/ ...

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... OPERATION Reset Output The STM690/704/795/802/804/805/806 Supervi- sor asserts a reset signal to the MCU whenever V goes below the reset threshold (V CC watchdog time-out occurs, or when the Push-but- ton Reset Input (MR) is taken low. RST is guaran- teed logic low (logic high for STM804/805) for 0V < ...

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... STM690/704/795/802/804/805/806 Chip-Enable Gating (STM795 only) Internal gating of the chip enable (E) signal pre- vents erroneous data from corrupting the external CMOS RAM in the event of an undervoltage con- dition. The STM795 uses a series transmission gate from (see Figure 12). During nor- CON mal operation (reset not asserted), the E transmis- sion gate is enabled and passes all E transitions ...

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... V input to the STM690/704/795/802/ CC 804/805/806 or the microprocessor drops below the minimum operating voltage. During battery back-up, the power-fail comparator is turned off and PFO goes (or remains) low (see Figure 14. Power-fail Comparator Waveform (STM690/704/802/804/805/806 RST V SW (2.4V) PFO PFO follows PFI RST STM690/704/795/802/804/805/806 Figure 14 ...

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... To external SRAM CC OUT STMXXX V RST To µP BAT GND 12/32 Negative-Going V The STM690/704/795/802/804/805/806 Supervi- sors are relatively immune to negative-going V transients (glitches). erated using a negative pulse applied to V starting at V supply. threshold by the magnitude indicated (comparator CC while V is above overdrive). The graph indicates the maximum ...

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... On-Resistance vs. Temperature CC OUT 5.0 4.0 3.0 2.0 1.0 0.0 –40 –20 Figure 17. V -to-V On-Resistance vs. Temperature BAT OUT 160 140 120 100 –40 –20 = 25° Temperature ( Temperature ( C) STM690/704/795/802/804/805/806 100 120 AI10498 V BAT = 2.0V V BAT = 3.0V V BAT = 3.3V V BAT = 3. 100 120 AI09140b 13/32 ...

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... STM690/704/795/802/804/805/806 Figure 18. Supply Current vs. Temperature (no load –40 –20 Figure 19. Battery Current vs. Temperature 1000 100 10 1 0.1 –40 –20 14/ Temperature ( C) V BAT = 2.0V V BAT = 3.0V V BAT = 3. Temperature ( 100 AI09141b 60 80 100 120 120 AI10499 ...

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... 2.5V 1.260 3. 3.3V 1.255 3.6V 1.250 1.245 1.240 1.235 1.230 1.225 –40 –20 Figure 21. Reset Comparator Propagation Delay vs. Temperature –40 – Temperature ( Temperature ( C) STM690/704/795/802/804/805/806 60 80 100 AI09142b 80 100 120 AI09143b 120 15/32 ...

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... STM690/704/795/802/804/805/806 Figure 22. Power-up t vs. Temperature rec 240 235 230 225 220 215 210 –40 –20 0 Figure 23. Normalized Reset Threshold vs. Temperature 1.004 1.002 1.000 0.998 0.996 –40 –20 16/ Temperature ( Temperature ( 3. 4. 5.5V 100 120 AI09144b 80 100 120 ...

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... Figure 24. Watchdog Time-out Period vs. Temperature 1.90 1.85 1.80 1.75 1.70 1.65 1.60 –40 –20 Figure 25 On-Resistance vs. Temperature CON –40 – Temperature ( Temperature ( C) STM690/704/795/802/804/805/806 100 AI09146b 100 120 120 AI09147b 17/32 ...

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... STM690/704/795/802/804/805/806 Figure 26. PFI to PFO Propagation Delay vs. Temperature 4.0 3.0 2.0 1.0 0.0 –40 –20 Figure 27. Output Voltage vs. Load Current (V 5.00 4.98 4.96 4.94 0 18/ Temperature ( BAT OUT ( 100 AI09148b = 2.8V 25° AI10496 120 50 ...

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... Figure 28. Output Voltage vs. Load Current (V 2.80 2.78 2.76 2.74 2.72 2.70 2.68 2.66 0.0 Figure 29. RST Output Voltage vs. Supply Voltage 0V BAT 0.2 0.4 I OUT (mA) 500ms/div STM690/704/795/802/804/805/806 = 2.8V 25°C) A 0.6 0.8 AI10497 V RST V CC AI09149b 1 19/32 ...

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... STM690/704/795/802/804/805/806 Figure 30. RST Output Voltage vs. Supply Voltage Figure 31. Power-fail Comparator Response Time (Assertion) 5V PFO 1.3V PFI 20/32 V RST V CC 500ms/div 500ns/div AI09150b 1V/div 0V 500mV/div 0V AI09153b ...

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... Figure 32. Power-fail Comparator Response Time (De-Assertion) PFO 0V PFI 0V Figure 33. Maximum Transient Duration vs. Reset Threshold Overdrive 6000 5000 4000 3000 2000 1000 0 0.001 500ns/div Reset occurs above the curve. 0.01 0.1 Reset Comparator Overdrive, V STM690/704/795/802/804/805/806 5V 1V/div 1.3V 500mV/div AI09154b 1 – V (V) RST CC AI09156b 10 21/32 ...

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... STM690/704/795/802/804/805/806 Figure 34 Propagation Delay vs. Temperature CON 4.0 3.0 2.0 1.0 0.0 –40 –20 MAXIMUM RATING Stressing the device above the rating listed in the Absolute Maximum Ratings” table may cause per- manent damage to the device. These are stress ratings only and operation of the device at these or ...

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... BAT 3.6V STM690/704/ 795/802/804/ 805/806 25 Equivalent Source Impedance Cable 50 GND 0.7V CC 0.3V CC AI02568 STM690/704/795/802/804/805/806 STM690/704/795/ 802/804/805/806 1.0 to 5.5 – 0.2 to 0.8V CC 0 CON (1) 50pF C L AI08854 Unit V ° 23/32 ...

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... STM690/704/795/802/804/805/806 Figure 37. MR Timing Waveform MR tMLRL (1) RST Note: 1. RST for STM805. Figure 38. Watchdog Timing V CC trec RST WDI Table 7. DC and AC Characteristics Alter- Sym Description native Operating Voltage (2) V BAT V Supply Current Supply Current in CC Battery Back-up Mode ...

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... V (max) CC RST I = 100µA, SOURCE 2.8V CC BAT I = 75µA, SOURCE ) CON 2.8V CC BAT STM802/ 804/806 PFI Falling (V < 3.6V) CC STM690/ 704/805 PFI Rising (V < 3.6V 3.6V, PFO = > V BAT SW Power-down V < V BAT SW (8,9) V > V BAT SW Power-up V < V BAT SW Min ...

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... The reset threshold tolerance is wider for V oscillation. 26/32 Test Condition STM690T 704T/795T 805T V STM802T/ CC 804T/806T V CC STM690S 704S/795S/ V 805S CC V STM802S/ CC 804S/806S V CC STM690R 704R/795R/ V 805R STM802R/ 804R/806R < 3. (max) < V RST CC V (max) < V RST (max) CC RST V ...

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... N A ddd Min Max 1.35 1.75 0.10 0.25 0.33 0.51 0.19 0.25 4.80 5.00 – 0.10 3.80 4.00 – – 5.80 6.20 0.25 0.50 0.40 0.90 0° 8° 8 STM690/704/795/802/804/805/806 h x 45˚ SO-A inches Typ Min – 0.053 – 0.004 – 0.013 – 0.007 – 0.189 – – – 0.150 0.050 – – 0.228 – 0.010 – 0.016 – 0° ...

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... STM690/704/795/802/804/805/806 Figure 40. TSSOP8 – 8-lead, Thin Shrink Small Outline, 3x3mm body size, Outline Note: Drawing is not to scale. Table 9. TSSOP8 – 8-lead, Thin Shrink Small Outline, 3x3mm body size, Mechanical Data Symb Typ A – A1 – A2 0.85 b – c – CP – D 3. ...

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... Table 10. Ordering Information Scheme Example: Device Type STM690/704/795/802/804/805/806 Reset Threshold Voltage T = STM690/704/795/805 = V RST STM802/804/806 = V = 3.00V to 3.12V RST S = STM690/704/795/805 = V RST STM802/804/806 = V = 2.88V to 3.00V RST R = STM690/704/795/805 = V RST STM802/804/806 = V = 2.59V to 2.70V RST Package M = SO8 ( TSSOP8 Temperature Range 6 = –40 to 85°C Shipping Method E = Tubes F = Tape & Reel Note: 1 ...

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... STM690/704/795/802/804/805/806 Table 11. Marking Description Part Number STM690T STM690S STM690R STM704T STM704S STM704R STM795T STM795S STM795R STM802T STM802S STM802R STM804T STM804S STM804R STM805T STM805S STM805R STM806T STM806S STM806R 30/32 Reset Threshold 3.075 2.925 2.625 3.075 2.925 2.625 3.075 2.925 2.625 3.075 2.925 2.625 3 ...

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... Update package availability, pin description; promote document (Figure 1, 14; Table 3, 10) Clarify root part numbers, pin descriptions, update characteristics (Figure 10, 11, 13, 14, 35; Table 10) Update Characteristics (Figure 11, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35; Table 7) Update characteristics (Figure 13) STM690/704/795/802/804/805/806 31/32 ...

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... STM690/704/795/802/804/805/806 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice ...