STM811 STMicroelectronics, STM811 Datasheet

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STM811

Manufacturer Part Number
STM811
Description
Active Low, Push-Pull
Manufacturer
STMicroelectronics
Datasheet

Specifications of STM811

Operating Temperature
–40 °C to 85 °C (industrial grade)

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Features
Table 1.
January 2010
Precision monitoring of 3 V, 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 to
V
Operating temperature:
–40 °C to 85 °C (industrial grade)
Lead-free, small SOT23 and SOT143 package
CC
STM809
STM810
STM811
STM812
= 1.0 V
Device summary
Active-low reset
Doc ID 9873 Rev 5
Active-high reset
Manual reset input
STM809, STM810
STM811, STM812
SOT143-4 (W1)
SOT23-3 (WX)
Reset circuit
SOT143-4
SOT143-4
Package
SOT23-3
SOT23-3
www.st.com
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STM811 Summary of contents

Page 1

... Lead-free, small SOT23 and SOT143 package Table 1. Device summary Active-low reset STM809 STM810 STM811 STM812 January 2010 Active-high reset ✔ ✔ ✔ ✔ Doc ID 9873 Rev 5 STM809, STM810 STM811, STM812 Reset circuit SOT23-3 (WX) SOT143-4 (W1) Manual reset input Package SOT23-3 SOT23-3 ✔ SOT143-4 ✔ SOT143-4 1/21 www.st.com 1 ...

Page 2

... Contents Contents 1 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 ...

Page 3

STM809/810/811/812 List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 4

... 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. ...

Page 5

... 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). Figure 1. Logic diagram (STM809/810) 1. For STM810 Figure 2. Logic diagram (STM811/812) 1 ...

Page 6

... 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) ...

Page 7

... Push-button reset input (STM811/812) A logic low on MR asserts RST. RST remains asserted while MR is low, and for t returns high. The MR input has an internal 20 kΩ pull-up resistor, allowing left open if not used ...

Page 8

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 ...

Page 9

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 ...

Page 10

Typical operating characteristics Figure 9. 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 –20 ...

Page 11

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 ...

Page 12

... 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. Refer also to the STMicroelectronics SURE Program and other relevant quality documents. Table 3. ...

Page 13

STM809/810/811/812 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 performed under the ...

Page 14

DC and AC parameters Table 5. DC and AC characteristics Alter- Sym Description native V Operating voltage supply current input high voltage input low voltage IL RST output low voltage ...

Page 15

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 ...

Page 16

Package mechanical data 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 ...

Page 17

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 ...

Page 18

... 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. ...

Page 19

... 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). Reset threshold Output 4.63 V Push-pull RST 4 ...

Page 20

Revision history 8 Revision history Table 10. Document revision history Date Revision 02-Sep-2003 03-Oct-2003 16-Oct-2003 17-Nov-2003 04-Dec-2003 09-Dec-2003 10-Feb-2004 19-Nov-2004 05-Jan-2010 20/21 1 First issue Update operating characteristics 1.1 Figure 10, Figure 11, Figure 1.2 Update characteristics (Table 1.3 Modified ...

Page 21

... 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. ...

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