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XRT4000 Datasheet(PDF) 7 Page - Exar Corporation |
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XRT4000 Datasheet(HTML) 7 Page - Exar Corporation |
7 / 46 page XRT4000 Rev. 1.00 - 7 - PIN DESCRIPTION (CONT’D) Pin # Symbol DTE Mode DCE Mode Type Function 35 TR7 LLA LLA I/O DTE Mode - Transmitter 7 - Single Ended Data Output to line DCE Mode - Receiver 7 - Single Ended Data Input from line 36 TX76D D_LL D_DCD I Digital Input - Refer to Mode Control Table 37 TR6A DCDA DCDA I/O DTE Mode - Receiver 6 - Negative Data Differential Input from line DCE Mode - Transmitter 6 - Negative Data Differential Output to line 38 TR6B DCDB DCDB I/O DTE Mode - Receiver 6 - Positive Data Differential Input from line DCE Mode - Transmitter 6 - Positive Data Differential Output to line 39 DCE/DTE* LOW HIGH I DCE/DTE Select - Selects operating mode. Logic 0: DTE Mode. Logic 1: DCE Mode. Internal 20K Ω pull-up 40 RX67D D_DCD D_LL O Digital Output - Refer to Mode Control Table 41 RX5D D_DSR D_DTR O Receiver 5 - Digital Data Output to equipment 42 EC* I Enable Clock Mode - Active Low, Logic 0: Echoed Mode. Logic 1: Normal Mode. Internal 20K Ω pull-up 43 RX5B DSRB DTRB I Receiver 5 - Positive Data Differential Input from line 44 RX5A DSRA DTRA I Receiver 5 - Negative Data Differential Input from line 45 RX4A CTSA RTSA I Receiver 4 - Negative Data Differential Input from line 46 RX4B CTSB RTSB I Receiver 4 - Positive Data Differential Input from line 47 SLEW_ CNTL O Analog Output - Resistor connected between this pin and Ground controls transmitter output pulse rise and fall time in V.10 or V.28 mode as specified in Figures 15 and 16 respectively. 48 RX4D D_CTS D_RTS O Receiver 4 - Digital Data Output to equipment 49 GND Digital GND for Receiver 4, 5, 6 50 NC 51 NC 52 GND Analog GND for bias generator. 53 NC 54 VSS Analog Substrate - Connect to -6V 55 E_232H* I High Speed RS-232 Enable - Logic 0: Enables high speed RS-232 mode (drives 3K Ω in parallel with 1000pF at 256KHz). Internal 20K Ω pull-up 56 VDD Analog VDD for bias generation circuit; Connect to +5V 57 VPP VPP - Connect to +12V supply 58 NC 59 NC 60 NC 61 NC 62 VPP VPP - Connect to +12V supply 63 VR O VR - Internally generated +2.2V Reference (Sources 20 µA maximum) Note: An asterisk (*) following a pin symbol indicates that the pin is active low. Names begining with D_ are digital signals. Names ending with B and A are the positive and negative polarities of differential signals respectively |
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Similar Description - XRT4000 |
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