SP3232EUCN-L - 1 Mbps Dual RS-232 Transceiver | MaxLinear
N.º da peça: SP3232EUCN-L ✓ AtivoSP3232EUCN-L Visão geral
An RS-232 transceiver is an interface IC that converts logic-level UART signals into RS-232 voltage levels and converts received RS-232 signals back into logic-compatible levels. The SP3232EUCN-L belongs to the RS-232 transceiver hierarchy, where transceiver ICs sit between host processors or microcontrollers and external D-sub or other RS-232 connectors. Its two driver and two receiver channels permit simultaneous bidirectional communication while reducing the external component count required for level conversion.
The device supports data transmission at up to 1000 kbps and operates from a 3.3 V supply. According to the manufacturer datasheet, its high-efficiency charge-pump supply requires only 0.1 uF capacitors for 3.3 V operation. This compact charge-pump arrangement supports compact portable designs while producing the bipolar voltage levels required by RS-232. The package also reduces board area compared with discrete driver and receiver implementations.
The SP3232EU family provides separate transmit and receive channels, allowing a system to send and receive RS-232 data through one interface IC. The receiver channels support integration with UART-based controllers, while the drivers connect to external RS-232 ports. Its 1000 kbps capability is suitable for moderate-speed diagnostic, configuration, control, and point-of-service interfaces rather than long-distance continuous high-bandwidth data links.
Typical uses include handheld test equipment, portable computers, serial adapters, point-of-sale terminals, industrial service interfaces, and embedded control systems that exchange configuration or diagnostic data through RS-232. The 16-pin SOIC package is particularly useful where a conventional through-hole or larger surface-mount footprint would be inconvenient.
When designing around the SP3232EUCN-L, place the charge-pump capacitors close to their designated pins and route the RS-232 driver outputs directly toward the connector. Keep logic-side traces away from the high-voltage transmit nets, provide the connector's normal ESD and surge-protection path, and verify that the connected UART baud rate and cable loading are compatible with 1000 kbps operation.
This page combines the manufacturer interface characteristics, package details, application guidance, verified drop-in alternatives, and practical PCB considerations to support faster component selection and implementation planning.
Alternativas drop-in para SP3232EUCN-L — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com SP3232EUCN-L (mesmo formato e footprint) — diferindo em Package, Supply Voltage.
SP3232EEY-L/TR
✅ Drop-InConsulte o preço
Ver ficha técnica →ADM3202ARNZ
✅ Drop-InConsulte o preço
Ver ficha técnica →ICL3232IBNZ
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
SP3232EUCN-L Especificações
| Product Type | RS-232 transceiver |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Maximum Data Rate | 1000 kbps |
| Tensão de alimentação | 3.3 V |
| Charge-Pump Capacitor Requirement | 0.1 uF in 3.3 V operation |
| Faixa de temperatura de operação | 0 C to 70 C |
| Encapsulamento | 16-pin SOIC |
| Tipo de montagem | Surface mount |
| Transceiver Configuration | 2/2 full RS-232 |
| Interface Standard | RS-232 |
| Logic Compatibility | 3.3 V UART interface |
| Power-Supply Architecture | High-efficiency charge-pump supply |
Configuração de pinos do SP3232EUCN-L
| Pino 1 | ON — Shutdown input |
| Pino 2 | R1IN — Receiver 1 input |
| Pino 3 | R1OUT — Receiver 1 output |
| Pino 4 | R2IN — Receiver 2 input |
| Pino 5 | R2OUT — Receiver 2 output |
| Pino 6 | GND — Ground |
| Pino 7 | V+ — Charge-pump positive output |
| Pino 8 | VCC — Supply voltage input |
| Pino 9 | V- — Charge-pump negative output |
| Pino 10 | T1IN — Driver 1 input |
| Pino 11 | T2IN — Driver 2 input |
| Pino 12 | T1OUT — Driver 1 output |
| Pino 13 | T2OUT — Driver 2 output |
| Pino 14 | C2+ — Charge-pump capacitor 2 positive terminal |
| Pino 15 | C2- — Charge-pump capacitor 2 negative terminal |
| Pino 16 | C1+ — Charge-pump capacitor 1 positive terminal |
Aplicações típicas
SP3232EUCN-L é adequado para 6 aplicaçãos: Portable Diagnostic Equipment, Point-of-Sale Terminal Interface, Industrial Service Console, Embedded Control and Test Interface, Portable Computer and Peripherals, Serial Adapter and Dongle.
Portable Diagnostic Equipment
The SP3232EUCN-L fits portable diagnostic tools that expose a service or configuration port through a 3.3 V UART. Its two drivers and two receivers support bidirectional RS-232 communication, while the 1000 kbps rate accommodates moderate-speed command and response traffic. The 16-pin SOIC package preserves board area in handheld enclosures, and the 0 C to 70 C commercial range suits controlled indoor operating environments. Use the integrated charge-pump circuit with the 0.1 uF capacitor arrangement specified for 3.3 V operation, and place those capacitors close to the IC to limit switching-current loops.
Recomendado
Point-of-Sale Terminal Interface
Point-of-sale terminals commonly combine a low-power host interface with an RS-232 path for peripherals, scales, or service equipment. The SP3232EUCN-L provides two transmit and two receive channels from a 3.3 V supply, reducing the need for discrete level-shifters. Its 1000 kbps capability is well above the throughput normally needed for short configuration commands and transaction-status exchanges. The 16-pin SOIC footprint is suitable for compact controller boards, although the commercial 0 C to 70 C rating should be checked against the terminal's internal temperature environment and display-induced heat.
Recomendado
Industrial Service Console
The SP3232EUCN-L can connect a service controller or embedded module to a legacy RS-232 equipment port for configuration, diagnostics, and firmware-service commands. Two receiver channels allow status or handshake signals to accompany one transmit channel, while two driver channels support command output and control signaling. The device's 1000 kbps maximum data rate supports common serial service protocols, while the actual UART baud rate should remain conservative enough for the cable and connector arrangement. Validate industrial temperature requirements separately because this ordering option is listed for 0 C to 70 C operation.
Recomendado
Embedded Control and Test Interface
Embedded controllers often need a robust way to communicate with external equipment through RS-232 while operating from a 3.3 V rail. The SP3232EUCN-L integrates two drivers and two receivers, a 1000 kbps interface rate, and the charge-pump circuitry required to generate RS-232 voltage levels in a 16-pin SOIC package. This is useful in automated test fixtures, board-level controllers, and service adapters. Keep the UART side and logic-ground return protected from connector transients, and verify the receiver's logic-level thresholds against the selected microcontroller before finalizing the interface.
Recomendado
Portable Computer and Peripherals
The original SP3232EU family targets portable and handheld equipment, and the SP3232EUCN-L retains that 3.3 V, low-component-count architecture. A system can use the transmitter channels for command output and the receiver channels for responses or control signals from a peripheral. The 1000 kbps capability supports high-speed relative to conventional RS-232 service links, while the compact SOIC package reduces connector-adapter area. The integrated charge pump needs only 0.1 uF capacitors in 3.3 V operation, but these components should still be placed close to their pins to minimize noise and startup-transient effects.
Recomendado
Serial Adapter and Dongle
A compact serial adapter can use the SP3232EUCN-L to translate between a 3.3 V UART from a controller and an external RS-232 connector. Two drivers and two receivers provide enough channels for data plus control signals without duplicating the interface circuit. Its 16-pin SOIC package and 1000 kbps capability suit compact data-transfer and configuration dongles, while the 0 C to 70 C range covers typical indoor accessory environments. The connector interface still needs appropriate transient protection, controlled return-current routing, and validation across the full cable length and selected baud rate.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para SP3232EUCN-L — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | SP3232EEY-L/TR | ADM3202ARNZ | ICL3232IBNZ |
|---|---|---|---|---|
| Brand | MaxLinear | MaxLinear | Analog Devices | Renesas Electronics |
| Package | 16-pin SOIC | 16-pin SOIC | 16-pin SOIC | 16-pin SOIC |
| Product Type | RS-232 transceiver | RS-232 transceiver | RS-232 transceiver | RS-232 transceiver |
| Number of Drivers | 2 | 2 | 2 | 2 |
| Number of Receivers | 2 | 2 | 2 | 2 |
| Interface Standard | RS-232 | RS-232 | RS-232 | RS-232 |
Principais diferenciais
- Documented 1000 kbps interface performance (vs ADM3202ARNZ)
- Low 3.3 V charge-pump capacitor requirement (vs ICL3232IBNZ)
- Commercial temperature coverage for indoor equipment (vs SP3232EEY-L/TR)
Notas de projeto
Place the 0.1 uF charge-pump capacitors directly between their assigned C1 and C2 pins using the shortest possible traces. The charge-pump current circulates through these components, so excessive loop area can increase radiated noise, reduce effective operating margin, and couple switching energy into adjacent UART traces. Follow the exact capacitor polarity and connection arrangement shown in the MaxLinear manufacturer datasheet.
Do not treat the suffix change from SP3232EUCN-L to a similarly numbered alternative as proof of interchangeability. Confirm the complete 16-pin pinout, 3.3 V electrical limits, receiver thresholds, shutdown pin behavior, charge-pump capacitor arrangement, and temperature grade. A package drawing match alone does not prove that every function or operating limit is identical.
Keep RS-232 driver outputs and connector-side return paths away from UART logic and sensitive analog traces. Route the two transmit nets directly toward the connector through the intended protection network, and preserve a controlled ground connection to the cable. Add connector-side transient protection appropriate to the installation environment rather than relying on the transceiver's internal level-conversion circuitry for connector surge protection.
Check the 3.3 V rail for the charge pump's pulsed current demand and place local high-frequency bypass capacitance near the VCC pin. The integrated charge-pump design reduces external capacitor count, but it still switches charge between the V+ and V- nodes. Validate the regulator's transient response and ensure ground-current paths do not create logic noise on the UART interface.
Informações de conformidade
RoHS, REACH, lead-free, halogen-free, and conflict-minerals status were not identified for this exact ordering option. The commercial 0 C to 70 C specification does not establish AEC-Q100 qualification.