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DP83910A Datasheet(PDF) 6 Page - Texas Instruments |
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DP83910A Datasheet(HTML) 6 Page - Texas Instruments |
6 / 14 page 60 Pin Descriptions 24-Pin DIP 28-Pin PCC Name IO Description 1 1 COL O COLLISION DETECT OUTPUT Generates an active high signal when 10 MHz collision signal is detected 2 2 RXD O RECEIVE DATA OUTPUT NRZ data output from the PLL This signal must be sampled on the rising edge of receive clock 3 3 CRS O CARRIER SENSE Asserted on the first valid high-to-low transition on the RXg pair Remains active until 15 bit times after the last bit in data 4 4 RXC O RECEIVE CLOCK The receive clock from the Manchester data after the PLL has locked Remains active 5 bit times after deasserting CRS 5 5 SEL I MODE SELECT When high transmita and transmitb are the same voltage in the idle state When low transmita is positive with respect to transmitb in the idle state at the transformer’s primary 67 VSS GROUND PIN 8VSS 9VSS 7 10 LBK I LOOPBACK When high the loopback mode is enabled 811 X1 I CRYSTAL OR EXTERNAL OSCILLATOR INPUT 912 X2 O CRYSTAL FEEDBACK OUTPUT Used in crystal connections only Connected to ground when using an external oscillator 10 13 TXD I TRANSMIT DATA INPUT NRZ data input from the controller The data is combined with the transmit clock to produce Manchester data TXD is sampled on the rising edge of transmit clock 11 14 TXC O TRANSMIT CLOCK The 10 MHz clock derived from the 20 MHz oscillator 12 15 TXE I TRANSMIT ENABLE The encoder begins operation when this input is asserted high 13 16 TXb O TRANSMIT OUTPUT Differential line driver which sends the encoded data to the transceiver The outputs are source followers which require 14 17 TXa 270X pull-down resistors 15 6 NC NO CONNECTION This may be tied to VSS for the PLCC version to be compatible with the DP8391 16 18 NC NO CONNECTION 17 19 TEST I FACTORY TEST INPUT Used to check the chip’s internal functions May be tied low or have a 001 mf bypass capacitor to ground (for compatibility with the bipolar DP8391) during normal operation 18 20 VDD POWER CONNECTION 19 21 VDD 22 VDD 23 VDD 20 24 NC NO CONNECTION 21 25 RXb I RECEIVE INPUT Differential receive input pair from the transceiver 22 26 RXa 23 27 CDb I COLLISION INPUT Differential collision pair input from the transceiver 24 28 CDa 5 |
Similar Part No. - DP83910A_11 |
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Similar Description - DP83910A_11 |
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