DS14C232TMX National Semiconductor, DS14C232TMX Datasheet - Page 6

• Manufacturer Part Number: DS14C232TMX
• Description: Dual Transmitter/Receiver RS-232 16-Pin SOIC N T/R
• Manufacturer: National Semiconductor

Specifications of DS14C232TMX

• Package: 16SOIC N
• Data Transmission Topology: Point-to-Point
• Interface Standards: EIA/TIA-232-E|RS-232|V.28
• Data Rate: 20(Max) Kbps
• Function: Line Transmitter/Receiver
• Number Of Transceivers: 1
• Number Of Transmitters: 2
• Transmitter Signal Type: Single-Ended
• Transmitter Communication Type: RS-232
• Typical Single Supply Voltage: 5 V

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Parameter Measurement Information
Pin Descriptions
V
Power supply pin for the device, +5V (
V+ (Pin 2)
Positive supply for TIA/EIA-232-E drivers. Recommended
external capacitor: C4-1.0 µF (6.3V). Capacitor value should
be larger than 1 µF. This supply is not intended to be loaded
externally.
V− (Pin 6)
Negative supply for TIA/EIA-232-E drivers. Recommended
external capacitor: C3-1.0 µF (16V). Capacitor value should
be larger than 1 µF. This supply is not intended to be loaded
externally.
C1+, C1− (Pins 1, 3)
External capacitor connection pins. Recommended capaci-
tor: 1.0 µF (6.3V). Capacitor value should be larger than
1 µF.
C2+, C2− (Pins 4, 5)
External capacitor connection pins. Recommended capaci-
tor: 1.0 µF (16V). Capacitor value should be greater than
1 µF.
CC
(Pin 16)
FIGURE 4. Receiver Propagation Delays and Noise Rejection (Note 4)
±
10%).
01074405
FIGURE 3. Receiver Load Circuit
01074406
6
(Continued)
D
Driver input pins are TTL/CMOS compatible. Inputs of un-
used drivers may be left open, an internal active pull-up
resistor (500 kΩ minimum, typically 5 MΩ) pulls input HIGH.
Output will be LOW for open inputs.
D
Driver output pins conform to TIA/EIA-232-E levels.
R
Receiver input pins accept TIA/EIA-232-E input voltages
(
hysteresis of 100 mV. Unused receiver input pins may be left
open. Internal input resistor 4.7 kΩ pulls input low, providing
a failsafe high output.
R
Receiver output pins are TTL/CMOS compatible. Receiver
output HIGH voltage is specified for both CMOS and TTL
load conditions.
GND (Pin 15)
Ground Pin.
±
IN
OUT
IN
OUT
25V). Receivers feature a noise filter and guaranteed
1, D
1, R
1, D
1, R
IN
IN
2 (Pins 11, 10)
2 (Pins 13, 8)
OUT
OUT
2 (Pins 14, 7)
2 (Pins 12, 9)