DS14C335 datasheet(5/9 Pages) NSC

Part #	DS14C335

Description	3.3V Supply TIA/EIA-232 3 x 5 Driver/Receiver

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Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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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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