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DS14C335 Datasheet(PDF) 5 Page - National Semiconductor (TI) |
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DS14C335 Datasheet(HTML) 5 Page - National Semiconductor (TI) |
5 / 9 page Parameter Measurement Information (Continued) Pin Descriptions V CC (Pin 3). Power supply pin for the device, +3.3V (±0.3V). V+ (Pin 1). Positive supply for TIA/EIA-232-E drivers. Rec- ommended external capacitor — 0.47 µF (16V). This supply is not intended to be loaded externally. V− (Pin 25). Negative supply for TIA/EIA-232-E drivers. Rec- ommended external capacitor — 0.47 µF (16V). This supply is not intended to be loaded externally. C1+, C1− (Pins 6, 24). External capacitor connection pins. Recommended capacitor — 0.47 µF (6.3V). C2+, C2− (Pins 2, 4). External capacitor connection pins. Recommended capacitor — 0.47 µF (16V). C3+, C3− (Pins 28, 26). External capacitor connection pins. Recommended capacitor — 0.47 µF (6.3V). SHUTDOWN (SD) (Pin 23). A High on the SHUTDOWN pin will lower the total I CC current to less than 10 µA, providing a low power state. In this mode receiver R5 remains active. The SD pin should be driven or tied low (GND) to disable the shutdown mode. D IN 1–3 (Pins 7, 8, 9). Driver input pins are JEDEC 3.3V standard compatible. D OUT 1–3 (Pins 22, 21, 20). Driver output pins conform to TIA/ElA-232 -E levels. R IN 1–5 (Pins 19, 18, 17, 16, 15). Receiver input pins accept TIA/EIA-232-E input voltages (±25V). Receivers guarantees hysteresis of TBD mV. Unused receiver input pins may be left open. Internal input resistor (5 k Ω) pulls input LOW, pro- viding a failsafe HIGH output. R OUT 1–5 (Pins 10, 11, 12, 13, 14). Receiver output pins are JEDEC 3.3V standard compatible. GND (Pin 27). Ground Pin. DS011734-8 FIGURE 6. Driver SHUTDOWN (SD) Delay Timing DS011734-9 FIGURE 7. Receiver SHUTDOWN (SD) Delay Test Circuit DS011734-10 FIGURE 8. Receiver SHUTDOWN (SD) Delay Timing www.national.com 5 |
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