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4 / 18 page STM809/810/811/812 4/18 SUMMARY DESCRIPTION The STM809/810/811/812 MICROPROCESSOR RESET Circuits are low-power supervisory devic- es used to monitor power supplies. They perform a single function: asserting a reset signal whenev- er 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). Figure 2. Logic Diagram (STM809/810) Note: 1. For STM810 Figure 3. Logic Diagram (STM811/812) Note: 1. For STM812 Table 2. Signal Names Note: 1. STM810/812 only 2. STM811/812 only Figure 4. SOT23-3 Connections Figure 5. SOT143-4 Connections Figure 6. Block Diagram Note: 1. STM811/812 only 2. RST for STM810/812 AI07832 VCC STM809/810 VSS RST (RST) (1) AI07831 VCC STM811/812 VSS RST (RST) (1) MR VSS Ground RST Active-Low RESET Output RST(1) Active-High RESET Output VCC Supply Voltage MR(2) Manual Reset Input AI07833 2 3 1 RST (RST) VSS (For STM810) VCC AI07834 2 4 3 1 RST (RST) VSS (For STM812) VCC MR AI07835 COMPARE VRST VCC DEBOUNCE trec Generator MR (1) RST (2) |
Số phần tương tự - STM812TWX6F |
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Mô tả tương tự - STM812TWX6F |
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