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LTC1383CN Datasheet(PDF) 4 Page - Linear Technology |
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LTC1383CN Datasheet(HTML) 4 Page - Linear Technology |
4 / 8 page 4 LTC1383 1383fa TYPICAL PERFOR A CE CHARACTERISTICS VCC Supply Current vs Temperature TEMPERATURE (°C) 0 0 2 6 8 10 40 18 LTC1383 • TPC04 4 20 10 50 30 60 70 12 14 16 2 DRIVERS LOADED RL = 3k 1 DRIVER LOADED RL = 3k Driver Output Waveforms Receiver Output Waveforms INPUT LTC1383 • TPC05 RECEIVER OUTPUT CL = 51pF INPUT LTC1383 • TPC06 VCC: 5V Input Supply Pin. This pin should be decoupled with a 0.1µF ceramic capacitor. GND: Ground Pin. V+: Positive Supply Output (RS232 Drivers). V+ ≅ 2VCC – 2V. This pin requires an external capacitor C = 0.1µF for charge storage. The capacitor may be tied to ground or VCC. With multiple devices, the V + and V – pins may share a common capacitor. For large numbers of devices, in- creasing the size of the shared common storage capaci- tors is recommended to reduce ripple. V–: Negative Supply Output (RS232 Drivers). V – ≅ – (2VCC – 2V). This pin requires an external capacitor C = 0.1µF for charge storage. C1+, C1–, C2+, C2–: Commutating Capacitor Inputs. These pins require two external capacitors C = 0.1µF: one from C1+ to C1– and another from C2+ to C2 –. To maintain charge pump efficiency, the capacitor’s effective series resistance should be less than 2Ω. TR IN: RS232 Driver Input Pins. Inputs are TTL/CMOS compatible. The inputs of unused drivers can be left unconnected since 300k input pull-up resistors to VCC are included on chip. TR OUT: Driver Outputs at RS232 Voltage Levels. The driver outputs are protected against ESD to ±10kV for human body model discharges. RX IN: Receiver Inputs. These pins can be forced to ±25V without damage. The receiver inputs are protected against ESD to ±10kV for human body model discharges. Each receiver provides 0.4V of hysteresis for noise immunity. RX OUT: Receiver Outputs with TTL/CMOS Voltage Levels. DRIVER OUTPUT RL = 3k CL = 2500pF DRIVER OUTPUT RL = 3k 5µs/DIV 5µs/DIV PI FU CTIO S |
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