stm706t-s-r STMicroelectronics, stm706t-s-r Datasheet

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... STM706T/S/R, STM706P, STM708T/S/R FEATURES SUMMARY PRECISION V MONITOR CC – STM706/708 T: 3.00V V 3.15V RST S: 2.88V V 3.00V RST R; STM706P: 2.59V RST AND RST OUTPUTS 200ms (TYP) t rec WATCHDOG TIMER - 1.6sec (TYP) MANUAL RESET INPUT (MR) POWER-FAIL COMPARATOR (PFI/PFO) LOW SUPPLY CURRENT - 40µA (TYP) GUARANTEED RST (RST) ASSERTION DOWN ...

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... Figure 4. STM706T/S/R and STM706P SO8 Connections Figure 5. STM706T/S/R and STM706P TSSOP8 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 6. STM708T/S/R SO8 Connections Figure 7. STM708T/S/R TSSOP8 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 3. Pin Description Figure 8. Block Diagram (STM706T/S/R and STM706P Figure 9. Block Diagram (STM708T/S/ Figure 10.Hardware Hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Reset Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Push-button Reset Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Watchdog Input (STM706T/S/R and STM706P) ...

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... Table 5. Operating and AC Measurement Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 27.AC Testing Input/Output Waveforms Figure 28.Power-fail Comparator Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 29.MR Timing Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Figure 30.Watchdog Timing (STM706T/S/R and STM706P Table 6. DC and AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 PACKAGE MECHANICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Figure 31.SO8 – 8-lead Plastic Small Outline, 150 mils body width, Package Mechanical Table 7. SO8 – ...

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... 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). Figure 2. Logic Diagram (STM706T/S/R and STM706P WDI STM706T/S/R, MR STM706P ...

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... Figure 4. STM706T/S/R and STM706P SO8 Connections SO8 PFI 4 5 Note: 1. For STM706P reset output is active-high. Figure 5. STM706T/S/R and STM706P TSSOP8 Connections TSSOP8 (1) RST(RST WDO Note: 1. For STM706P reset output is active-high. STM706T/S/R; STM706P; STM708T/S/R Figure 6 ...

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... STM706T/S/R; STM706P; STM708T/S/R Pin Descriptions MR. A logic low on MR asserts the reset output. Reset remains asserted as long low and for t after MR returns high. This active-low input rec has an internal pull-up. It can be driven from a TTL or CMOS logic line, or shorted to ground with a switch ...

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... Figure 8. Block Diagram (STM706T/S/R and STM706P) WDI WDI Transitional Detector PFI Note: 1. For STM706P only. Figure 9. Block Diagram (STM708T/S/ PFI STM706T/S/R; STM706P; STM708T/S/R WATCHDOG TIMER V COMPARE RST V COMPARE PFI COMPARE V RST V COMPARE PFI WDO t (1) rec RST(RST) ...

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... STM706T/S/R; STM706P; STM708T/S/R Figure 10. Hardware Hookup Unregulated Voltage R1 R2 Note: 1. For STM706T/S/R and STM706P. 2. For STM706P and STM708T/S/R. 8/26 Regulator STM706T/S/R; 0.1 F STM706P; STM708T/S/R (1) WDI From Microprocessor PFI MR Push-button (1) To Microprocessor IRQ WDO PFO To Microprocessor NMI RST To Microprocessor Reset (2) RST ...

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... MR may float tied to V when not used. CC Watchdog Input (STM706T/S/R and STM706P) The watchdog timer can be used to detect an out- of-control MCU. If the MCU does not toggle the Watchdog Input (WDI) within t Watchdog Output pin (WDO) is asserted. The in- ternal 1 ...

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... STM706T/S/R; STM706P; STM708T/S/R Interfacing to Microprocessors with Bi- directional Reset Pins Microprocessors with bi-directional reset pins can contend with the STM70x reset output. For exam- ple, if the reset output is driven high and the micro wants to pull it low, signal contention will result. To prevent this from occurring, connect a 4.7k resis- tor between the reset output and the micro’ ...

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... 3. 3.3V 1.255 3.6V 1.250 1.245 1.240 1.235 1.230 1.225 –40 –20 Figure 15. Reset Comparator Propagation Delay vs. Temperature –40 –20 STM706T/S/R; STM706P; STM708T/S Temperature ( Temperature ( 100 AI09142b 80 100 120 AI09143b 120 11/26 ...

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... STM706T/S/R; STM706P; STM708T/S/R Figure 16. Power-up t vs. Temperature rec 240 235 230 225 220 215 210 –40 –20 0 Figure 17. Normalized Reset Threshold vs. Temperature 1.004 1.002 1.000 0.998 0.996 –40 –20 12/ Temperature ( Temperature ( 3. 4. 5.5V 100 120 AI09144b ...

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... Figure 18. Watchdog Time-out Period vs. Temperature 1.90 1.85 1.80 1.75 1.70 1.65 1.60 –40 –20 Figure 19. PFI to PFO Propagation Delay vs. Temperature 4.0 3.0 2.0 1.0 0.0 –40 –20 STM706T/S/R; STM706P; STM708T/S Temperature ( Temperature ( 100 AI09146b 100 120 AI09148b 120 13/26 ...

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... STM706T/S/R; STM706P; STM708T/S/R Figure 20. Output Voltage vs. Load Current (V 5.00 4.98 4.96 4.94 0 Figure 21. Output Voltage vs. Load Current (V 2.80 2.78 2.76 2.74 2.72 2.70 2.68 2.66 0.0 14/ BAT OUT (mA BAT 0.2 0.4 I OUT (mA) = 2.8V 25° AI10496 = 2.8V 25°C) A 0.6 0.8 AI10497 50 1.0 ...

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... Figure 22. RST Output Voltage vs. Supply Voltage Figure 23. RST Output Voltage vs. Supply Voltage STM706T/S/R; STM706P; STM708T/S/R V RST V CC 500ms/div V RST V CC 500ms/div AI09149b AI09150b 15/26 ...

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... STM706T/S/R; STM706P; STM708T/S/R Figure 24. Power-fail Comparator Response Time (Assertion) 5V PFO 1.3V PFI Figure 25. Power-fail Comparator Response Time (De-Assertion) PFO 0V PFI 0V 16/26 500ns/div 500ns/div 1V/div 0V 500mV/div 0V AI09153b 5V 1V/div 1.3V 500mV/div AI09154b ...

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... O P Power Dissipation D Note: 1. Reflow at peak temperature of 255°C to 260°C for < 30 seconds (total thermal budget not to exceed 180°C for between 90 to 150 seconds). STM706T/S/R; STM706P; STM708T/S/R Reset occurs above the curve. 0.01 0.1 Reset Comparator Overdrive, V plied. Exposure to Absolute Maximum Rating con- ditions for extended periods may affect device reliability ...

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... STM706T/S/R; STM706P; STM708T/S/R DC AND AC PARAMETERS This section summarizes the operating measure- ment conditions, and the DC and AC characteris- tics of the device. The parameters in the DC and AC characteristics Tables that follow, are derived from tests performed under the Measurement Table 5. Operating and AC Measurement Conditions ...

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... Figure 29. MR Timing Waveform MR tMLRL (1) RST Note: 1. RST for STM706P and STM708T/S/R. Figure 30. Watchdog Timing (STM706T/S/R and STM706P trec RST WDI WDO Table 6. DC and AC Characteristics Alter- Sym Description native V Operating Voltage Supply Current CC CC Input Leakage Current (WDI) ...

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... Push-button Reset Input Pulse Width MLMH RST Output Delay MLRL MRD Watchdog Timer (STM706T/S/R and STM706P) t Watchdog Timeout Period WD WDI Pulse Width Note: 1. Valid for Ambient Operating Temperature (min) = 1.0V for T = 0°C to +85° For V falling ...

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... Note: Drawing is not to scale. Table 7. SO8 – 8-lead Plastic Small Outline, 150 mils body width, Package Mechanical Data Symb Typ A – A1 – B – C – D – ddd – E – e 1.27 H – h – L – – N STM706T/S/R; STM706P; STM708T/S/R 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 ...

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... STM706T/S/R; STM706P; STM708T/S/R Figure 32. TSSOP8 – 8-lead, Thin Shrink Small Outline, 3x3mm body size, Outline Note: Drawing is not to scale. Table 8. TSSOP8 – 8-lead, Thin Shrink Small Outline, 3x3mm body size, Mechanical Data Symb Typ A – A1 – A2 0.85 b – c – ...

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... RST R, STM706P: 2.59V V 2.70V RST Package M = SO8 DS = TSSOP8 Temperature Range 6 = –40 to 85°C Shipping Method E = Tubes F = Tape & Reel For other options, or for more information on any aspect of this device, please contact the ST Sales Office nearest you. STM706T/S/R; STM706P; STM708T/S/R STM706 23/26 ...

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... STM706T/S/R; STM706P; STM708T/S/R Table 10. Marking Description Part Number STM706P STM706T STM706S STM706R STM708T STM708S STM708R 24/26 Reset Threshold 2.63V 3.08V 2.93V 2.63V 3.08V 2.93V 2.63V Package Topside Marking SO8 706P TSSOP8 SO8 706T TSSOP8 SO8 706S TSSOP8 SO8 706R TSSOP8 SO8 708T ...

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... STM706T/S/R; STM706P; STM708T/S/R Revision Details First Issue Reformatted; update characteristics (Figure 10, 28, 29, 30; Table Add Typical Operating Characteristics (Figure 13, 14, 15, 16, 17, 18, 19, 22, 23, 24, 25, 26) Reformatted; update characteristics (Figure 15, 19, 22, 23, 26; Table 6) Update characteristics (Table 3, 6) Datasheet promoted ...

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... STM706T/S/R; STM706P; STM708T/S/R 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 ...