STMicroelectronics STM809
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 VCC supply voltage drops below a preset value and keeping it asserted until VCC has risen above the preset threshold for a minimum period of time (trec). The STM811/812 also provide a push-button reset input (MR).| Part No. | STM809 |
|---|---|
| Datasheet | STM809 Download |
| Manufacturer |  STMicroelectronics |
| Description | Reset circuit |
| Buy | Stock & Price |
FEATURES
● 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 VCC = 1.0 V
● Operating temperature: –40 °C to 85 °C (industrial grade)
● Lead-free, small SOT23 and SOT143 package STM809, STM810 STM811, STM812 Reset circuit SOT23-3 (WX) SOT143-4 (W1) Table 1. Device summary Active-low reset STM809 ✔ STM810 STM811 ✔ STM812 Active-high reset Manual reset input ✔ ✔ ✔ ✔ Package SOT23-3 SOT23-3 SOT143-4 SOT143-4 January 2010 Doc ID 9873 Rev 5 1/21 1 STM809/810/811/812 1
DESCRIPTION
DESCRIPTION
Figure 1. Logic diagram (STM809/810) VCC STM809/810 RST (RST)(1) 1. For STM810 VSS Figure 2. Logic diagram (STM811/812) VCC MR STM811/812 RST (RST)(1) AI07832 VSS 1. For STM812 Table 2. VSS RST RST(1) Signal names Ground Active-low reset output Active-high reset output VCC MR(2) Supply voltage Manual reset input 1.
