NM232DDC
| Parameters | |
|---|---|
| RoHS Status | RoHS Compliant |
| Package / Case | 24-DIP (0.667", 16.95mm) |
| Mfr | Murata Power Solutions Inc. |
| Mounting Type | Through Hole |
| Operating Temperature | 0°C ~ 70°C |
| Type | Transceiver |
| Data Rate | 9.6kbps |
| Receiver Hysteresis | 500 mV |
| Supplier Device Package | 24-DIP |
| Voltage - Supply | 4.5V ~ 5.5V |
| Protocol | RS232 |
| Number of Drivers/Receivers | 2/2 |
| Duplex | Full |
| Package | Tube |
| Product Status | Obsolete |
| Base Product Number | NM232 |
| REACH Status | REACH Unaffected |
| Other Names | 811-1444-5 |
| Standard Package | 15 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
| Series | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
NM232DDC Murata isolated RS-232 transceiver
The NM232DDC, originally developed by C&D Technologies and now supported by Murata Power Solutions, is a fully isolated dual EIA-232-D line transceiver designed to provide robust serial communication in electrically noisy environments . Housed in a low-profile 24-pin DIP package (through-hole mounting), this device integrates two transmitters and two receivers on a single chip, eliminating the need for external DC/DC converters or additional isolation components . A single 5V supply powers both sides of the isolation barrier, simplifying system design while delivering 1.5kVrms isolation protection that effectively breaks ground loops and suppresses common-mode noise across the interface . The NM232DDC complies fully with EIA-232-D, EIA-232-E, and CCITT V.28 standards at the interface boundary while presenting TTL/CMOS compatibility at logic connections, making it an ideal drop-in solution for industrial control systems, medical equipment, and PLC communication ports requiring galvanic isolation .
NM232DDC Technical Specifications
Engineered for reliable operation across a standard 4.5V to 5.5V supply range, the NM232DDC consumes a typical operating current of 53mA while delivering a data rate of 9.6kbps, suitable for most legacy RS-232 applications such as modem interfaces and serial instrumentation . The device features Schmitt trigger inputs with built-in hysteresis, providing 500mV of receiver hysteresis for improved noise immunity on the RS-232 lines . Propagation delays measure 10µs from logic to RS-232 and 1.2µs from RS-232 to logic, ensuring predictable timing for half-duplex or full-duplex communication protocols . The device operates reliably from 0°C to 70°C and is RoHS compliant with matte tin terminal finish .
Alternative RS-232 transceivers
1. MAX233ACPP+G36 – Maxim Integrated's 5V-powered, 2-driver/2-receiver RS-232 transceiver in 20-pin DIP with internal charge pump capacitors, offering 120kbps data rate without requiring external capacitors.
2. LT1280ACN#PBF – Analog Devices' 5V-powered, 2-driver/2-receiver RS-232 transceiver in 18-pin DIP with 250kbps data rate and 0.1µF external capacitors for space-saving designs.
3. MAX3235EEWP+G36 – Maxim's 5V dual RS-232 transceiver in 20-pin wide SOIC (SMD) with 250kbps data rate and enhanced ESD protection for surface-mount applications.
