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GD75323DW Datasheet(PDF) 10 Page - Texas Instruments |
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GD75323DW Datasheet(HTML) 10 Page - Texas Instruments |
10 / 11 page GD75323 MULTIPLE RS-232 DRIVERS AND RECEIVERS SLLS213A – JANUARY 1996 – REVISED JUNE 1999 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION Diodes placed in series with the VDD and VSS leads protect the GD75323 in the fault condition in which the device outputs are shorted to VDD or VSS, and the power supplies are at low and provide low-impedance paths to ground (see Figure 15). VDD VSS ±15 V Output VDD VSS GD75323 GD75323 Figure 15. Power-Supply Protection to Meet Power-Off Fault Conditions of TIA / EIA-232-F 10 9 8 7 6 5 4 3 2 1 GND 5DA 3RY 4DA 2RY 1RY 3DA 2DA 1DA VCC VSS 5DY 3RA 4DY 2RA 1RA 3DY 2DY 1DY VDD 11 12 13 14 15 16 17 18 19 20 43 37 40 13 36 11 41 42 RI DTR CTS SO RTS SI DSR DCD RI DTR CTS TX RTS RX DSR DCD GD75323 5 V TL16C450 ACE 1 5 6 9 12 V – 12 V TIA/EIA-232-F DB9S Connector C2† C5† † See Figure 10 to select the correct values for the loading capacitors (C1, C2, C3, C4, and C5), which may be required to meet the RS-232 maximum slew-rate requirement of 30 V/ µs. The value of the loading capacitors required depends upon the line length and desired slew rate, but is typically 330 pF. NOTE C: To use the receivers only, VDD and VSS both must be powered or tied to ground. C4† C3† C1† Figure 16. Typical Connection |
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