Slkor SL232E: 2.0‑6.0 V Supply SOP‑16 Dual‑Channel RS‑232 Interface Transceiver

1. Core Product Parameters

1. Power supply parameters: Operating supply voltage range 2.0-6.0 V, recommended operating supply voltage range 4.5-5.5 V; maximum static consumption current 14.0 mA.
2. Signal level parameters: Receiver inputs accept RS-232 levels with an input voltage tolerance range of -30 V to 30 V. Receiver outputs and transmitter inputs adopt TTL/CMOS levels. Transmitter outputs provide RS-232 levels. Receiver input resistance ranges from 3.0 kΩ to 7.0 kΩ.
3. Current parameters: Maximum input low current 10.0 μA; maximum input high current 10.0 μA; output current 24 mA; minimum latching current 450 mA at 25 ℃; maximum transmitter short-circuit output current ±60 mA.
4. Static-potential tolerance parameter: Minimum tolerable static potential 2000 V.
5. Rate and timing parameters: Maximum information transmission rate 120 kbit/s; maximum receiver signal propagation delay 10 μs; maximum transmitter signal propagation delay 6.0 μs.
6. Temperature parameters: Recommended operating ambient temperature -40 ℃ to 85 ℃; absolute maximum ambient temperature -60 ℃ to 150 ℃.
7. Package: SOP-16.

2. Core Product Features

1. Operates from a single power supply. The internal voltage multiplier circuit generates positive and negative voltages required by the RS-232 interface without external positive-negative power supplies.
2. Dual-channel transceiving paths, including 2 transmitters and 2 receivers, supporting two groups of bidirectional level conversion between RS-232 and TTL/CMOS.
3. CMOS-compatible input levels; outputs can interface with CMOS, NMOS and TTL integrated circuits, matching IO ports of mainstream main-control chips.
4. Hysteresis characteristic on receivers to improve anti-interference performance for communication.
5. Short-circuit protection; transmitter outputs can sustain continuous short-circuit conditions.
6. High electrostatic-discharge resistance with minimum 2000 V static-potential tolerance to enhance field-application reliability.
7. Low input current; input current can reach 0.1 μA at 25 ℃ and reduces load consumption for preceding driving circuits.
8. Supports maximum 120 kbit/s communication rate to meet rate requirements of conventional RS-232 serial communication.

3. Main Application Fields

1. Industrial-control equipment: RS-232 serial-communication interfaces for industrial controllers and field measurement-and-control devices.
2. High-performance information-processing systems: Serial-port expansion modules for embedded devices and industrial computers.
3. Instruments and meters: Serial-port data-exchange interfaces for measuring and testing equipment.
4. Consumer and commercial communication peripherals: Serial-port conversion modules and serial-port debugging adapters.
5. General-purpose control devices: Hardware circuits requiring bidirectional conversion between TTL and RS-232 levels.

4. Engineering Design Recommendations

1. Power-supply circuit: Keep the supply voltage on the VCC pin within 2.0-6.0 V; 4.5-5.5 V is preferred in practical engineering. Place a 0.1 μF power-supply filter capacitor close to the VCC pin and connect the GND pin reliably to the system ground plane.
2. Charge-pump external capacitors: Pins C1+, C1-, C2+, C2-, V+ and V- must be connected to 0.1 μF external capacitors for the voltage multiplier unit. Place capacitors as close to corresponding chip pins as possible and shorten trace lengths to ensure normal positive-negative-voltage output of the charge pump.
3. Signal-interface processing: For RS-232 receiver-input pins R1IN and R2IN, 5 kΩ pull-down resistors can be applied referring to reference schematic to optimize receiver operating status. Connect TTL/CMOS transmitter-input pins T1IN and T2IN directly to main-control IO ports. Connect receiver-output pins R1OUT and R2OUT to main-control receiving IO ports.
4. Layout design: Separate RS-232 signal traces from TTL digital-signal traces appropriately to reduce crosstalk between high-voltage and low-voltage signals. Add extra protective components for external RS-232 interfaces to suppress external surge interference.
5. Operating-condition control: Maintain chip ambient temperature within the recommended range of -40 ℃ to 85 ℃. Avoid long-term operation exceeding transmitter short-circuit-current specifications to prevent device damage.
6. Rate matching: Do not exceed the maximum 120 kbit/s communication rate in actual deployment. Keep load capacitance within datasheet limits to guarantee signal timing quality.

5. Product Summary

SL232E is a SOP-16 packaged dual-channel RS-232 transceiver chip. It realizes bidirectional level conversion between TTL/CMOS and RS-232 with a single power supply. Only a small number of external capacitors are needed to build a complete serial-port conversion circuit. Featuring wide operating-voltage range, electrostatic resistance, short-circuit endurance and hysteresis-based anti-interference capability, this chip works within industrial-grade temperature range. It fits RS-232 serial-circuit design for industrial equipment, instruments and embedded systems, and serves as a practical device for general-purpose serial-port level conversion.

About Slkor：

Slkor has research and development offices in Busan, South Korea, Beijing, China, and Suzhou, China. Most of the wafer manufacturing and packaging and testing are carried out within China. The company employs and collaborates with individuals and organizations worldwide, with a laboratory for product performance and reliability testing and a central warehouse located at its headquarters in Shenzhen. Slkor has filed for over a hundred invention patents, offers more than 2,000 product models, and serves over ten thousand customers globally. Its products are exported to countries and regions including Europe, the Americas, Southeast Asia, and the Middle East, making it one of the rapidly growing semiconductor companies in recent years. With well-established management systems and streamlined workflows, Slkor has rapidly enhanced the brand awareness and reputation of its "SLKOR" brand through its outstanding quality and standardized services. Its product range includes three major series: diodes, transistors, and power devices, with recent introductions of new products such as Hall elements and analog devices, expanding its presence in sensors, Risc-v microcontrollers, and other product categories.

SL232ETo Product Page