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DS14C239WM Datasheet(PDF) 5 Page - National Semiconductor (TI) |
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DS14C239WM Datasheet(HTML) 5 Page - National Semiconductor (TI) |
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5 / 8 page  Parameter Measurement Information (Continued) TLF11283 – 8 FIGURE 5 Receiver Disable Load Circuit TLF11283 – 9 FIGURE 6 Receiver TRI-STATE Timing (tPHZ tPZH) TLF11283 – 10 FIGURE 7 Receiver TRI-STATE Timing (tPLZ tPZL) Pin Descriptions VCC (pin 4) Power supply pin for the device a5V (g10%) V a (pin 5) Positive supply for TIAEIA-232-E drivers Specified at 75V minimum and 132V maximum V b (pin 8) Negative supply for TIAEIA-232-E drivers Recommended external capacitor C2 e 10 mF (16V) This supply is not intended to be loaded externally C1 a C1 b (pins 6 7) External capacitor connection pins Recommended capacitor10 mF (16V) EN (pin 14) Controls the Receiver output TRI-STATE Cir- cuit A High level on this pin will disable the Receiver Out- put DIN 1–3 (pins 24 23 16) Driver input pins are TTLCMOS compatible Inputs of unused drivers may be left open an internal pull-up resistor (500 kX minimum typically 5 MX) pulls input to VCC Output will be LOW for open inputs DOUT 1–3 (pins 19 20 13) Driver output pins conform to TIAEIA-232-E levels RIN 1–5 (pins 2 21 18 12 9) Receiver input pins accept TIAEIA-232-E input voltages (g15V) Receivers feature a noise filter and guaranteed hysteresis of 100 mV Unused receiver input pins may be left open Internal input resistor (5 kX) pulls input LOW providing a failsafe HIGH output ROUT 1–5 (pins 1 22 17 11 10) Receiver output pins are TTLCMOS compatible Receiver output HIGH voltage is specified for both CMOS and TTL load conditions GND (pin 3) Ground pin http www nationalcom 5 |
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Similar Description - DS14C239WM |
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