STM809 STMicroelectronics, STM809 Datasheet

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... Features ■ Precision monitoring 3.3 V, and 5 V supply voltages ■ Two output configurations – Push-pull RST output (STM809/811) – Push-pull RST output (STM810/812) ■ 140 ms reset pulse width (min) ■ Low supply current - 6 µA (typ) ■ Guaranteed RST/RST assertion down ...

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... Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1 Reset output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2 Push-button reset input (STM811/812 2.3 Negative-going V 2.4 Valid RST output down Typical operating characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 7 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 2/21 transients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Doc ID 9873 Rev 5 STM809/810/811/812 ...

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... STM809/810/811/812 List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Table 2. Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Table 3. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Table 4. Operating and AC measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Table 5. DC and AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Table 6. SOT23-3 – 3-lead small outline transistor package mechanical data Table 7. SOT143-4 – 4-lead small outline transistor package mechanical data Table 8 ...

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... List of figures List of figures Figure 1. Logic diagram (STM809/810 Figure 2. Logic diagram (STM811/812 Figure 3. SOT23-3 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 4. SOT143-4 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 5. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 6. Hardware hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 7. Supply current vs. temperature, L/M/R/S/T (no load Figure 8. Power-down reset delay vs. temperature - V Figure 9. Power-down reset delay vs. temperature - V Figure 10. ...

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... STM809/810/811/812 1 Description The STM809/810/811/812 microprocessor reset circuits are low-power supervisory devices used to monitor power supplies. They perform a single function: asserting a reset signal whenever the has risen above the preset threshold for a minimum period of time (t CC STM811/812 also provide a push-button reset input (MR). ...

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... Description Figure 3. SOT23-3 connections Figure 4. SOT143-4 connections Figure 5. Block diagram ( STM811/812 only 2. RST for STM810/812 Figure 6. Hardware hookup V CC Push-button RESET 1. STM809/811 only (RST for STM810/812) 2. STM811/812 only 6/ RST (RST) (For STM810 RST (RST) (For STM812) ...

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... Negative-going V The STM809/810/811/812 are relatively immune to negative-going V Figure 12 on page 11 (for which the STM809/810/811/812 will NOT generate a reset pulse). The graph was generated using a negative pulse applied to V threshold and ending below it by the magnitude indicated (comparator overdrive). The graph indicates the maximum pulse width a negative V reset pulse ...

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... Operation 2.4 Valid RST output down to V When V falls below 1 V, the RST (STM809/811) output no longer sinks current, but CC becomes an open circuit. In most systems this is not a problem, as most MCUs do not operate below 1 V. However, in applications where RST output must be valid down pull-down resistor may be added to hold the RST output low ...

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... STM809/810/811/812 3 Typical operating characteristics Note: Typical values are at T and V = 3.0 V for R versions. CC Figure 7. Supply current vs. temperature, L/M/R/S/T (no load) Figure 8. Power-down reset delay vs. temperature - V 140.00 120.00 100.00 80.00 60.00 40.00 20. ° for L/M versions 8.0 6.0 4.0 2.0 0.0 –40 – Temperature (°C) 0.00 –40 – Temperature (°C) ...

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... Power-down reset delay vs. temperature - V 100.00 80.00 60.00 40.00 20.00 Figure 10. Power-up t 250.00 240.00 230.00 220.00 210.00 200.00 10/21 0.00 –40 – Temperature (°C) vs. temperature rec –40 – Temperature (°C) Doc ID 9873 Rev 5 STM809/810/811/812 = V – V (R/S/ 20mV 125mV 200mV L/M R/S AI07878 AI07881 ...

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... STM809/810/811/812 Figure 11. Normalized reset threshold vs. temperature Figure 12. Max transient duration NOT causing reset pulse vs. reset comparator overdrive 1.003 1.002 1.001 1.000 0.999 0.998 0.997 0.996 0.995 0.994 0.993 –40 – Temperature (°C) 700.00 600.00 500.00 400.00 300.00 200.00 100.00 0. ...

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... Supply voltage CC I Output current O P Power dissipation D 1. Reflow at peak temperature of 260 °C. The time above 255 °C must not exceed 30 seconds. 12/21 Parameter off) CC Doc ID 9873 Rev 5 STM809/810/811/812 Value Unit –55 to 150 °C 260 °C –0 +0 –0 ...

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... Input and output timing ref. voltages Figure 13. AC testing input/output waveforms Figure 14. MR timing waveform MR (1) RST 1. RST for STM810/812 Parameter ) A 0.8V CC 0.2V CC tMLRL trec tMLMH Doc ID 9873 Rev 5 DC and AC parameters STM809/810/811/812 Unit 1.0 to 5.5 V – °C ≤ 0 0 0.7V CC 0.3V CC AI02568 ...

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... STM8XXT – °C 25 °C STM8XXS – °C 25 °C STM8XXR – ° 3 STM8XXL RST (V – 100 mV) STM8XXR/S/T RST Doc ID 9873 Rev 5 STM809/810/811/812 Min Typ Max Unit 1.2 5.5 V 1.0 5.5 V 5.5 10 µ µA 2 0.8 V 0.25 V ...

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... STM809/810/811/812 Alter- Sym Description native Push-button reset input pulse width MLMH RST output t t MLRL MRD (3) delay MR glitch immunity MR pull-up resistance t RST pulse width rec 1. Valid for ambient operating temperature For active high (RST (max) CC RST 3. RST output for STM810/812 4. “ ...

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... Typ Min Max 0.89 1.12 0.01 0.10 0.88 1.02 0.30 0.50 0.08 0.20 2.80 3.04 2.10 2.64 1.20 1.40 0.89 1.03 1.78 2.05 0.54 0.40 0.60 0° 8° 3 Doc ID 9873 Rev 5 STM809/810/811/812 0. inches Typ Min Max 0.035 0.044 0.001 0.004 0.035 0.042 0.012 0.020 0.003 0.008 0.110 0.120 0.083 0.104 0.047 0.055 0.035 0.041 0.070 0.081 0.021 0.016 0.024 0° ...

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... STM809/810/811/812 Figure 16. SOT143-4 – 4-lead small outline transistor package outline Note: Drawing is not to scale. Table 7. SOT143-4 – 4-lead small outline transistor package mechanical data Symbol Θ ...

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... V to 3.15 V RST 2. 3.00 V RST 2. 2.70 V RST Package WX = SOT23-3 (STM809, STM810 SOT143-4 (STM811, STM812) Temperature range 6 = – °C Shipping method ® ECOPACK package, tape & reel For a list of available options (e.g., speed, package) or for further information on any aspect of this device, please contact the ST sales office nearest to you. ...

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... STM809/810/811/812 Table 9. Marking description Part number STM809L STM809M STM809T STM809S STM809R STM810L STM810M STM810T STM810S STM810R STM811L STM811M STM811T STM811S STM811R STM812L STM812M STM812T STM812S STM812R letter assigned to indicate assembly work week (i.e WW01 and WW02 WW03 and WW04 WW05 and WW06..., Z = WW51, WW52, and WW53). ...

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... Modified with JEDEC timing symbols 2 Reformatted; promoted; updated 2.1 Correct timing label, combine characteristics 3 Clarify package; update DC characteristics 4 Update dimensions (Table Table Updated footnote in 5 mechanical data, added footnote to Doc ID 9873 Rev 5 STM809/810/811/812 Changes 7, Figure 8, Figure (Figure 12) 5); modify illustration 12) (Figure (Figure 14;Table 5) 14; Table 5, 6) (Figure 10 ...

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... STM809/810/811/812 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. ...