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SMM764FR6 데이터시트(PDF) 5 Page - Summit Microelectronics, Inc. |
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SMM764FR6 데이터시트(HTML) 5 Page - Summit Microelectronics, Inc. |
5 / 33 page SMM764 Preliminary Information Summit Microelectronics, Inc 2098 1.1 6/29/2005 5 PIN DESCRIPTIONS Pin Number Pin Type Pin Name Pin Description 1 DATA SDA SDA (Serial Data) is an open drain bi-directional pin used as the I 2C data line. 2 CLK SCL SCL (Serial Clock) is an open drain input pin used as the I 2C Clock line. 3 IN A2 The A2 (Address bit 2) pin is biased either to VDD_CAP or GND. When communicating with the SMM764 over the 2-wire I 2C bus, A2 provides a mechanism for assigning a unique bus address. 4 IN MR# MR# (Manual Reset) is an active low input. When asserted the RST# output will become active. When de-asserted the RST# output will go inactive immediately after a reset timeout period (tRTO) if there are no RST# trigger sources active. This timeout period makes it suitable to use as a pushbutton for manual reset purposes. 5 I/O PWR_ON PWR_ON (Power On) is an open drain bi-directional pin. On the rising edge of PWR_ON the part will sequence the supplies on, during the falling edge the part will sequence the supplies off. This pin must be tied high through an external pull-up resistor. Note: The SMM764 does not monitor for faults during power-on/off sequencing. 6 I/O FS# FS# (Force Shutdown) is an open drain active low bi-directional pin. FS# is used to immediately turn off all converter enable signals (PUP outputs) when a fault is detected. Whenever FS# is asserted PWR_ON will automatically be pulled low as well. This pin must be tied high through an external pull-up resistor. 7 OUT FAULT# The FAULT# pin is an active low open drain output. Active when a programmed fault condition exists on AIN1, AIN2, or the internal temperature sensor. When used, FAULT# should be pulled high through an external pull- up resister. 8 OUT HEALTHY HEALTHY is an active high open drain output. Active when all programmed power supply inputs and monitored inputs are within OV and UV limits and ADOC has begun. When used, HEALTHY should be pulled high through an external pull-up resistor. 9 OUT RST# RST# (Reset) is an active low open drain output pin. Active when a programmed fault condition exists on any power supply inputs or monitored inputs, when MR# is active, or when ADOC is not ready. RST# has a programmable timeout period with options for 0.64ms, 25ms, 100ms and 200ms. When used, RST# should be pulled high through an external pull-up resistor. 10 IN AIN1 AIN1 (Analog Input 1) is a general-purpose monitored analog input. 11 IN AIN2 AIN2 (Analog Input 2) is a general-purpose monitored analog input. 12,19, 24 GND GND Ground. |
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