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ADM1232AAN Folha de dados(PDF) 4 Page - Analog Devices |
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ADM1232AAN Folha de dados(HTML) 4 Page - Analog Devices |
4 / 6 page ADM1232A –4– REV. 0 PIN FUNCTION DESCRIPTIONS Mnemonic Function PB RESET Push Button Reset Input. This debounced input will ignore pulses of less than 1 ms and is guaranteed to re- spond to pulses greater than 20 ms. TD Time Delay Set allows the user to select the maximum amount of time the ADM1232A will allow the STROBE input to remain inactive (i.e., STROBE is not receiving any high-to-low transitions), without forcing the ADM1232A to generate a RESET pulse. (See STROBE specifications, Figure 4 and the note on STROBE timeout selection.) TOLERANCE Tolerance Input. This input will determine how much the supply voltage will be allowed to decrease (as a per- centage tolerance) before a RESET is asserted. Connect to VCC for 10% and GND for 5%. GND 0 V ground reference for all signals. RESET Active high logic output. Will be asserted when: 1. VCC decreases below the amount specified by the TOLERANCE input or, 2. PB RESET is forced low or, 3. If there are no high-to-low transitions within the limits set by TD at STROBE or, 4. During power-up. RESET Inverse of RESET, with an open drain output. STROBE The STROBE input is used to monitor the activity of a microprocessor. If there are no high-to-low transi- tions within the time specified by TD, a reset will be asserted. VCC Power supply input +5 V. PIN CONFIGURATIONS R-16 14 13 12 11 16 15 10 9 8 1 2 3 4 7 6 5 TOP VIEW (Not to Scale) ADM1232A NC = NO CONNECT NC NC TD NC TOLERANCE GND PB RESET NC STROBE NC NC NC NC RESET RESET VCC N-8 and R-8 1 2 3 4 8 7 6 5 TOP VIEW (Not to Scale) ADM1232A PB RESET RESET STROBE VCC TD TOLERANCE GND RESET RM-8 1 2 3 4 8 7 6 5 TOP VIEW (Not to Scale) ADM1232A PB RESET RESET STROBE VCC TD TOLERANCE GND RESET |
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