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STM6904 bảng dữ liệu(PDF) 5 Page - STMicroelectronics |
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STM6904 bảng dữ liệu(HTML) 5 Page - STMicroelectronics |
5 / 21 page STM6904 Description 5/21 1 Description The STM6904 supervisor is a low voltage/low supply current processor supervisor, designed to monitor up to four system power supply voltages. This device is targeted at applications such as Set-Top Boxes (STBs), portable, battery-powered systems, networking and communication systems. The device supports a push-button type manual reset input (MR). Two of the four supply monitors (VCC and V2IN) have fixed (customer-selectable, factory-trimmed) thresholds (VRST1 and VRST2). The other two voltage monitor inputs (V3IN and V4IN) are monitored using externally adjustable threshold (0.600V internal reference) to meet specific level requirements. If any of the four monitored voltages drops below its factory-trimmed or adjustable thresholds, or if the MR is asserted to logic low, the reset output RST is asserted (driven low). Once asserted, RST is maintained Low for a minimum delay period (trec) after ALL monitored supplies rise above their respective thresholds and MR returns to High. This device is in the correct reset output logic state when VCC greater than 0.8V. The STM6904 is available in a standard 8-lead MSOP (TSSOP) package. Figure 1. Logic diagram Figure 2. MSOP/TSSOP-8 connections V4IN VCC STM6904 MR RST VSS TRSEL V2IN V3IN ai13976 1 V3IN VSS V4IN TRSEL VCC MR RST V2IN ai13977 2 3 4 8 7 6 5 |
Số phần tương tự - STM6904 |
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Mô tả tương tự - STM6904 |
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