SP3232EBER-L/TR - 250kbps RS-232 Transceiver | MaxLinear
MPN: SP3232EBER-L/TR ✓ Hoạt độngSP3232EBER-L/TR Tóm tắt
An RS-232 transceiver is a level-shifting interface IC that converts between logic-level CMOS/TTL signals and the bipolar +/- voltage swings defined by the RS-232 (EIA-232) standard. The SP3232EB/SP3222EB family belongs to the interface IC hierarchy: transceiver -> RS-232 interface -> serial transceiver -> integrated circuit. Because RS-232 uses inverting logic and elevated voltages, a transceiver is required between a host UART and a cable-attached peripheral, and the chip also supplies the biasing voltages the standard demands.
Key features of this device include an integrated high-efficiency charge-pump power supply that needs only 0.1 uF capacitors when operated from 3.3V, true RS-232 levels from a single low-voltage supply, low-power operation suited to battery-powered equipment, integrated charge-pump capacitors in most qualified variants, and 15 kV ESD protection on the driver and receiver pins. The receiver hysteresis of 300 mV gives noise immunity against slow-moving bus edges in industrial cables.
Technically the part replaces the older MAX232-style architecture by combining the charge-pump inverter, the dual driver bank and the dual receiver bank into one 16-QFN device. Because the on-chip charge pump operates continuously, the internal supply rails move only slightly with input voltage, so the transceiver behaves as a true single-supply RS-232 solution from 3V to 5V. The exposed pad under the QFN provides a low-impedance thermal and ground path, which matters when the package is used in compact handheld enclosures.
Typical applications include point-of-sale terminals, barcode scanners, handheld test and measurement instruments, industrial serial cables, USB-to-serial adapters, medical and diagnostic equipment, and notebook or palmtop computer serial ports. The 250 kbaud data rate comfortably covers legacy RS-232 peripherals, while the 5x5 mm footprint suits space-constrained handheld and portable designs.
When designing with the SP3232EBER-L/TR, place the charge-pump capacitors and the RS-232 line-side protection network close to the pins, route the driver outputs and receiver inputs as a matched, tightly coupled pair, and keep the analog ground return continuous under the device. Pay attention to the exposed-pad solder and thermal requirements, and confirm the cable-side ESD margin when connecting to externally accessible ports.
Bộ thay thế dễ dàng lắp đặt cho SP3232EBER-L/TR — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với SP3232EBER-L/TR (cùng hình factor và footprint) — khác nhau ở Maximum Data Rate, Package, Mounting Type, Charge-Pump Capacitor Value, Device Type.
SP3232EEY-L/TR
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →SP3232ECY-L/TR
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →SP3232EEN-L/TR
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →SP3232EBER-L
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SP3232EBER-L/TR Thông số kỹ thuật
| Device Type | RS-232 transceiver (2 driver / 2 receiver) |
| Number of Drivers/Receivers | 2/2 |
| Duplex | Full duplex |
| Protocol | RS-232 (EIA-232) |
| Supply Voltage Range | 3 V to 5 V |
| Maximum Data Rate | 250 kbaud |
| ESD Protection | 15 kV |
| Receiver Hysteresis | 300 mV |
| Internal Charge Pump | Yes, high-efficiency charge-pump supply |
| Charge-Pump Capacitor Value | 0.1 uF in 3.3 V operation |
| Supply Topology | Single-supply, true RS-232 levels |
| Hộp | 16-QFN (5x5 mm) with exposed pad |
| Packaging | Tape & Reel (TR) |
| Product Status | Active |
| Kiểu lắp đặt | Surface mount |
| Data Rate (Alternate Marking) | SP3232E series specified at 250 kbaud |
Hướng dẫn cấu hình chân SP3232EBER-L/TR 16-qfn (5x5 mm) with exposed pad
Cấu hình chân cho SP3232EBER-L/TR (16-qfn (5x5 mm) with exposed pad gói). Số thứ tự chân, chức năng và sơ đồ kết nối được xác định trong tài liệu thông số kỹ thuật của nhà sản xuất. Tham khảo nó để biết footprint và hướng dẫn hàn chính xác.
Không có dữ liệu chân cụ thể sẵn có cho SP3232EBER-L/TR.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
SP3232EBER-L/TR phù hợp cho 6 Áp dụngs: USB-to-RS-232 Serial Adapters, Point-of-Sale Terminals and Barcode Scanners, Handheld Test and Measurement Instruments, Industrial and Building Control Panels, Medical and Diagnostic Equipment, Portable and Battery-Powered Terminals.
USB-to-RS-232 Serial Adapters
The SP3232EBER-L/TR fits compact USB-to-serial dongles because it runs from a single 3.3 V or 5 V rail while still delivering true RS-232 bipolar levels to the connector. The on-chip high-efficiency charge pump needs only 0.1 uF capacitors in 3.3 V operation, which keeps the external component count and board area low. At 250 kbaud maximum data rate, the interface handles legacy DB-9 peripherals such as printers, scanners and programming cables without risk of overdriving the bus. The 15 kV ESD rating on the line-side pins protects the dongle when the user plugs in an unprotected cable, while the 16-QFN (5x5 mm) footprint leaves room for the USB bridge and connector mechanics.
Được đề xuất
Point-of-Sale Terminals and Barcode Scanners
Point-of-sale hardware still relies on RS-232 for legacy peripherals such as receipt printers, magnetic-stripe readers and handheld barcode scanners. The SP3232EBER-L/TR provides the two drivers and two receivers needed to cover a printer port plus a scanner port in a single device, with full-duplex operation on both channels. Its 3 V to 5 V single-supply operation shares the rail with the transaction-processing electronics, and the 250 kbaud data rate matches the signalling speed of this class of equipment. The 16-QFN (5x5 mm) package is small enough for compact scanner handles, and 15 kV ESD protection is valuable because these ports are frequently exposed to user-handled cables in retail environments.
Được đề xuất
Handheld Test and Measurement Instruments
Handheld meters, oscilloscopes and process calibrators frequently offer an RS-232 port for PC-based data logging and instrument control. The SP3232EBER-L/TR suits these instruments because it runs from a 3 V to 5 V battery-derived rail, requires only 0.1 uF charge-pump capacitors in 3.3 V operation, and adds negligible bulk to a handheld enclosure. The 250 kbaud data rate is well above the throughput needed for command-and-response instrument protocols, while the receiver hysteresis of 300 mV keeps the link reliable when the instrument is connected via long or poorly shielded field leads. The 16-QFN (5x5 mm) footprint also leaves board area for the display driver and front-end signal chain.
Được đề xuất
Industrial and Building Control Panels
Building automation controllers, HVAC panels and industrial control units often retain RS-232 ports for configuration tools and legacy field equipment. The SP3232EBER-L/TR gives such panels true RS-232 levels from a single 3 V to 5 V rail, avoiding the separate negative rail a discrete charge-pump design would need. The 2/2 channel configuration maps naturally onto a configuration port plus an auxiliary service port, and the 250 kbaud rate comfortably exceeds the 9600 to 115200 baud rates typical of controller protocols. The 300 mV receiver hysteresis improves noise immunity in electrically noisy panels, and 15 kV ESD protection is a practical requirement when field technicians connect service cables to the unit.
Được đề xuất
Medical and Diagnostic Equipment
Diagnostic analysers and laboratory instruments often expose an RS-232 service port for laboratory information system integration. The SP3232EBER-L/TR allows a single low-voltage rail to feed both the logic side and the RS-232 line side, which simplifies isolation and power-supply design in compact benchtop and cart-mounted equipment. Its 15 kV ESD protection rating is a meaningful advantage when the port connects to patient-adjacent or shop-floor peripherals through long cables. The 250 kbaud rate matches typical ASTM-style serial transfer rates for instrument data output, and the 16-QFN (5x5 mm) package keeps the analog front end and display electronics together on a crowded board.
Được đề xuất
Portable and Battery-Powered Terminals
Notebook-class and palmtop computer serial accessories, mobile data-collection terminals and battery-powered payment devices need RS-232 capability without a second supply rail. The SP3232EB family was designed specifically for portable and hand-held applications, and the SP3232EBER-L/TR implements that architecture with an integrated high-efficiency charge pump requiring only 0.1 uF capacitors in 3.3 V operation. Running from 3 V to 5 V means the transceiver can share the battery-derived system rail, which reduces quiescent current and simplifies power management. The 16-QFN (5x5 mm) tape-and-reel package suits automated assembly of high-volume handheld products and leaves maximum board area for the radio and display subsystem.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho SP3232EBER-L/TR — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | SP3232EEY-L/TR | SP3232ECY-L/TR | SP3232EEN-L/TR | SP3232EBER-L |
|---|---|---|---|---|---|
| Package | 16-QFN (5x5) | 16-QFN (5x5) - same | 16-QFN (5x5) - same | 16-QFN (5x5) - same | 16-QFN (5x5) - same |
| Brand | MaxLinear, Inc. | MaxLinear, Inc. | MaxLinear, Inc. | MaxLinear, Inc. | MaxLinear, Inc. |
| Device Type | RS-232 transceiver (2/2) | RS-232 transceiver (2/2) | RS-232 transceiver (2/2) | RS-232 transceiver (2/2) | RS-232 transceiver (2/2) |
| Supply Voltage Range | 3 V to 5 V | 3 V to 5 V | 3 V to 5 V | 3 V to 5 V | 3 V to 5 V |
| Charge-Pump Capacitor (3.3 V) | 0.1 uF | 0.1 uF | 0.1 uF | 0.1 uF | 0.1 uF |
| Duplex | Full duplex | Full duplex | Full duplex | Full duplex | Full duplex |
| Packaging | Tape & Reel (TR) | Tape & Reel (TR) | Tape & Reel (TR) | Tape & Reel (TR) | Non tape-and-reel packing |
Bảo phân biệt quan trọng
- Single 3 V to 5 V supply delivering true RS-232 levels (vsSP3232ECY-L/TR)
- Higher data-rate ceiling within the same 16-QFN footprint (vsSP3232ECY-L/TR)
- 15 kV ESD protection on externally accessible line pins (vsSP3232EEN-L/TR)
- Tape-and-reel 16-QFN (5x5) packing for automated assembly (vsSP3232EBER-L)
Ghi chú thiết kế
Keep the charge-pump capacitors and the RS-232 line-side components as close to the device pins as the 16-QFN (5x5) land pattern allows. Place the 0.1 uF charge-pump capacitors directly across their designated pins with a short, symmetric return path, and route the two TX outputs and two RX inputs as a tightly coupled differential-style pair so that the driver edge rate does not radiate into adjacent sensitive traces. Keep the exposed pad soldered to a solid, uninterrupted ground pour; it is both the device ground reference and the primary thermal path.
Do not treat the SP3232EBER-L/TR as a logic-level RS-232 substitute for TTL serial links on the line side. The driver outputs swing to positive and negative RS-232 voltages, so the connector side needs the correct polarity mapping relative to the UART's TX/RX lines, and the receiver inputs must never be exposed to voltages beyond the absolute maximum ratings. Also remember that the 250 kbaud figure is the family data-rate limit for the SP3232EB, and that the ES rating applies to the interface pins rather than to the logic-side pins.
RS-232 drivers use a slew rate that can radiate harmonics into adjacent circuitry. In a mixed-signal handheld or panel design, place the transceiver near the connector, keep the TX/RX traces short, and avoid running them parallel to sensitive analog or high-speed clock nets over long spans. If the port is user-accessible, add a dedicated chassis-ground reference and consider an external TVS/protection network on the line side, since the 15 kV ESD rating on the IC alone does not substitute for cable-level protection and proper discharge paths.
Estimated: with the charge-pump supply running continuously in a 3.3 V system, the supply current drawn by the SP3232EBER-L/TR sets a floor on battery life for handheld designs. Multiply the datasheet typical and maximum supply-current figures by the duty cycle of the serial link to obtain the average consumption, then confirm the host regulator can source the peak value during charge-pump startup. Placing the 0.1 uF capacitors close to the pins also limits inrush on the rail during power-up sequencing.
Thông tin tuân thủ
The device is listed as an active product by MaxLinear, Inc. in a 16-QFN (5x5) tape-and-reel package. RoHS, REACH, lead-free and halogen-free declarations are not stated in the product listings, so they are recorded as unknown rather than assumed. This part is an interface transceiver rather than an automotive-qualified product, so AEC-Q100 does not apply.
