DS14C238WM National Semiconductor, DS14C238WM Datasheet - Page 4

• Manufacturer Part Number: DS14C238WM
• Manufacturer: National Semiconductor

Specifications of DS14C238WM

• Data Rate: 120Kbps
• Interface Circuit Standard 1: EIA/TIA-232-E/V.28
• Number Of Receivers: 4
• Number Of Transmitters: 4
• Number Of Transceivers: 1
• Data Transmission Topology: Point-to-Point
• Receiver Signal Type: Single-Ended
• Transmitter Signal Type: Single-Ended
• Single Supply Voltage (typ): 5V
• Single Supply Voltage (min): 4.5V
• Single Supply Voltage (max): 5.5V
• Dual Supply Voltage (typ): Not RequiredV
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Supply Current: 10mA
• Power Supply Requirement: Single
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 24
• Package Type: SOIC W
• Lead Free Status / Rohs Status: Not Compliant

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Parameter Measurement Information
Pin Descriptions
V
+5V (
V+ (pin 11) — Positive supply for TIA/EIA-232-E drivers. Recommended external capacitor: C4 = 1.0 µF (6.3V). This supply is not
intended to be loaded externally.
V− (pin 15) — Negative supply for TIA/EIA-232-E drivers. Recommended external capacitor: C3 = 1.0 µF (16V). This supply is not
intended to be loaded externally.
C1+, C1− (pins 10 and 12) — External capacitor connection pins. Recommended capacitor – 1.0 µF (6.3V).
C2+, C2− (pins 13 and 14) — External Capacitor connection pins. Recommended capacitor – 1.0 µF (16V).
D
internal pull-up resistor (500 kΩ minimum, typically 5 MΩ) pulls input to V
D
R
filter and guaranteed hysteresis of 200 mV. Unused receiver input pins may be left open. Internal input resistor (5 kΩ) pulls input
LOW, providing a failsafe HIGH output.
R
for both CMOS and TTL load conditions.
GND (pin 8) — Ground Pin.
CC
IN
OUT
IN1
OUT
1–4 (pins 5, 18, 19, and 21) — Driver input pins are TTL/CMOS compatible. Inputs of unused drivers may be left open, an
(pin 9) — Power supply pin for the device,
1–4 (pins 3, 7, 23, and 16) — Receiver input pins accept TIA/EIA-232-E input voltages (
±
1–4 (pins 4, 6, 22, and 17) — Receiver output pins are TTL/CMOS compatible. Receiver output HIGH voltage is specified
1–4 (pins 2, 1, 24, and 20) — Driver output pins conform to TIA/EIA-232-E levels.
10%).
FIGURE 4. Receiver Propagation Delays and Noise Rejection
4
(Continued)
CC
. Output will be LOW for open inputs.
±
15V). Receivers feature a noise
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