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LTC4302-2 Datasheet(PDF) 5 Page - Linear Technology |
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LTC4302-2 Datasheet(HTML) 5 Page - Linear Technology |
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5 / 20 page  LTC4302-1/LTC4302-2 5 sn430212 430212fs PI FU CTIO S SDAIN (Pin 1): Serial Data Input. Connect this pin to the SDA bus on the backplane. Do not float. SCLIN (Pin 2): Serial Clock Input. Connect this pin to the SCL bus on the backplane. Do not float. CONN (Pin 3): Register Reset and Connection Sense Input. Driving this pin low resets the registers to their default state: GPIOs in output open-drain high impedance mode, rise time accelerators disabled and the input-to- output connection disabled. Communication with the LTC4302-1/LTC4302-2 is disabled when CONN is low. When CONN is brought back high, the registers remain in the default state and communication is enabled. ADDRESS (Pin 4): 2-Wire Address Programming Input. The 2-wire address is programmed by connecting ADDRESS to a resistive divider between VCC and ground. The voltage on ADDRESS is converted by an internal analog-to-digital (A/D) converter into a 5-bit digital word. This resulting digital code represents the least significant five bits of the 2-wire address. 1% resistors must be used to ensure accurate address programming. 32 unique addresses are possible. See Table 1 for 1% resistor values and corresponding addresses. Care must also be taken to minimize capacitance on ADDRESS. Resistors must be placed close to the LTC4302-1/LTC4302-2’s VCC, GND and ADDRESS pins. GND (Pin 5): Ground. Connect this pin to a ground plane for best results. GPIO1 (Pin 6): General Purpose Input/Output (GPIO1). GPIO1 can be used as an input, an open-drain output or a push-pull output. The N-Channel MOSFET pulldown de- vice is capable of driving LEDs. When used in input or open-drain output mode, the I/O pin can be pulled up to a supply voltage ranging from 2.2V to 5.5V independent of the VCC voltage. GPIO2 (Pin 7, LTC4302-1): General Purpose Input/Out- put. GPIO2 can be used as an input, an open-drain output, or a push-pull output. The N-Channel MOSFET pulldown device is capable of driving LED’s. When used in input or open-drain output mode, the I/O pin can be pulled up to a supply voltage ranging from 2.2V to 5.5V independent of the VCC voltage. VCC2 (Pin 7, LTC4302-2): Card Side Supply Voltage. This pin is a power supply pin for the card side busses. Connect VCC2 to the card’s VCC and connect a bypass capacitor of at least 0.01 µF directly between VCC2 and GND for best results. VCC (Pin 8): Main Input Power Supply from Backplane. Connect a bypass capacitor of at least 0.01 µF directly between VCC and GND for best results. SCLOUT (Pin 9): Serial Clock Output. Connect this pin to the SCL bus on the I/O card. Do not float. SDAOUT (Pin 10): Serial Data Output. Connect this pin to the SDA bus on the I/O card. Do not float. tSU, DAT tSU,STO tSU,STA tBUF tHD,STA tSP tSP tHD,DATO, tHD,DATI tHD,STA tf START CONDITION STOP CONDITION REPEATED START CONDITION START CONDITION 4302 TD01 SDA SCL TI I G DIAGRA |
Similar Part No. - LTC4302-2 |
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Similar Description - LTC4302-2 |
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