SP3222EBEY-L/TR - 3V-5.5V RS-232 2-DRV/2-RCV Transceiver | MaxLinear
MPN: SP3222EBEY-L/TR ✓ Hoạt độngSP3222EBEY-L/TR Tóm tắt
An RS-232 transceiver is a line driver/receiver IC that translates between logic-level (TTL/CMOS) signals on a UART and the +/-5V to +/-15V bipolar swing required by the legacy RS-232 standard. Within the broader component hierarchy, RS-232 transceivers sit under interface ICs, which themselves belong to the integrated circuits family used for board-level data communication. These parts remain essential for industrial equipment, point-of-sale terminals, and legacy peripherals that still expose the DB-9 or RJ-style RS-232 port.
Key features include a 1 µA low-power shutdown mode with receivers kept active (SP3222EB), ESD protection of +/-15 kV Human-Body Model on the RS-232 bus pins, and interoperability with industry-standard RS-232 controllers. The 2-driver/2-receiver topology covers full-duplex DCE/DTE links, including hardware handshaking when both pairs are routed to RTS/CTS and DTR/DSR. The TSSOP-20 footprint and 4.40 mm body width suit compact portable designs such as laptop docking stations, hand-held terminals, and embedded serial ports on single-board computers.
Internally, the SP3222EB uses a regulated charge-pump doubler/inverter that generates the required +5.5V and -5.5V drivers from a single 3.0V to 5.5V supply, eliminating the historical need for a +/-12V rail. Receivers operate from the main 3.3V supply and accept true RS-232 levels regardless of VCC, making the part interoperable with any compliant RS-232 peer.
Typical applications include notebook and palmtop computers, industrial PLC programming ports, point-of-sale terminals, embedded serial debug headers, and any portable equipment that needs a compact, single-supply RS-232 link. Compared with larger 5V-only legacy parts, the SP3222EB cuts capacitor count and PCB area by roughly half while preserving the 250 kbps throughput engineers expect from the EIA/TIA-232-F standard.
When designing with this device, place the four 0.1 µF charge-pump capacitors as close to C1+/C1-/C2+/C2- as routing allows and keep the switched-capacitor traces short to limit radiated emissions. If a true RS-232 voltage swing is required at low VCC, confirm that the charge-pump regulator remains stable across the entire 3.0V to 5.5V input range.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving buyers and design engineers a single reference for sourcing and applying the SP3222EBEY-L/TR.
Bộ thay thế dễ dàng lắp đặt cho SP3222EBEY-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 SP3222EBEY-L/TR (cùng hình factor và footprint) — khác nhau ở Data Rate, Low-Power Shutdown Current, Package.
SP3222ECY-L/TR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SP3232ECT-L/TR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TRS3222EIPWR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX3222EIPWR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ST3222ECTR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SP3222EBEY-L/TR Thông số kỹ thuật
| Chức năng | RS-232 Transceiver (2 drivers / 2 receivers) |
| Protocol | RS-232 (EIA/TIA-232-F compliant) |
| Supply Voltage (VCC) | 3.0 V to 5.5 V |
| Tốc độ dữ liệu | 250 kbps (under load) |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Low-Power Shutdown Current | 1 µA (receivers active, SP3222EB) |
| Charge Pump Capacitors | 4 x 0.1 µF (3.3V operation) |
| Hộp | 20-TSSOP (Y), 4.40 mm body width |
| Kiểu lắp đặt | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Đông trùng haogen | Yes (per Future Electronics listing) |
| Trạng thái RoHS | Compliant |
Cấu hình chân SP3222EBEY-L/TR
| Chân 1 | C1+ — Charge-pump flying capacitor positive terminal |
| Chân 2 | V+ — Charge-pump generated +5.5V supply |
| Chân 3 | C1- — Charge-pump flying capacitor negative terminal |
| Chân 4 | C2+ — Charge-pump flying capacitor positive terminal |
| Chân 5 | C2- — Charge-pump flying capacitor negative terminal |
| Chân 6 | V- — Charge-pump generated -5.5V supply |
| Chân 7 | T1OUT — RS-232 driver 1 output |
| Chân 8 | T2OUT — RS-232 driver 2 output |
| Chân 9 | R1IN — RS-232 receiver 1 input |
| Chân 10 | R2IN — RS-232 receiver 2 input |
| Chân 11 | GND — Ground |
| Chân 12 | VCC — 3.0V to 5.5V supply input |
| Chân 13 | SHDN — Shutdown control (active low on SP3222EB) |
| Chân 14 | T1IN — TTL/CMOS driver 1 input |
| Chân 15 | T2IN — TTL/CMOS driver 2 input |
| Chân 16 | R1OUT — TTL/CMOS receiver 1 output |
| Chân 17 | R2OUT — TTL/CMOS receiver 2 output |
| Chân 18 | NC — Not connected (per datasheet) |
| Chân 19 | NC — Not connected (per datasheet) |
| Chân 20 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
SP3222EBEY-L/TR phù hợp cho 6 Áp dụngs: Notebook & Palmtop Serial Ports, Industrial PLC Programming & Debug Ports, Point-of-Sale (POS) Terminals, Embedded Single-Board Computer Debug Headers, Medical Device Service Ports, Networking Equipment Console Ports.
Notebook & Palmtop Serial Ports
The SP3222EBEY-L/TR is purpose-built for portable computing serial ports where a single 3.3V supply must deliver true EIA/TIA-232-F +/-5V swings. With 250 kbps data rate, 2 drivers, and 2 receivers, it covers full hardware-handshake DB-9 links from a laptop or palmtop without needing a bipolar rail. The 1 µA shutdown with active receivers lets a sleeping host wake on incoming characters, extending battery life in suspend mode. Charge-pump capacitors are only 0.1 µF, so the entire transceiver fits in roughly half the PCB area of legacy 5V-only RS-232 parts.
Được đề xuất
Industrial PLC Programming & Debug Ports
The SP3222EBEY-L/TR serves as the RS-232 transceiver on industrial PLCs, HMI panels, and motor-drive debug headers that need a single-supply 3.3V or 5V link. Its 250 kbps rate and 2/2 driver/receiver topology support full hardware handshaking (RTS/CTS, DTR/DSR), which legacy PLC firmware still expects. The 20-TSSOP body (4.40 mm wide) and tape-and-reel packaging suit automated SMT lines, while +/-15 kV HBM ESD on the bus pins protects against field-service technician surges and cable-charging transients.
Được đề xuất
Point-of-Sale (POS) Terminals
POS terminals, receipt printers, and barcode scanners often retain RS-232 for cash-drawer kick-out, legacy scale interfaces, and firmware-update cables. The SP3222EBEY-L/TR delivers compliant RS-232 levels from a single 3.3V rail, fits the compact mainboards typical of POS hardware, and offers 1 µA shutdown current to extend standby time between customer transactions. Its 20-TSSOP footprint is interchangeable with the TI TRS3222E and MAX3222E, simplifying dual-sourcing for high-volume POS OEMs.
Được đề xuất
Embedded Single-Board Computer Debug Headers
Many Raspberry-Pi-class and industrial SBC designs expose a 3-pin TTL header plus a full RS-232 DB-9 for legacy peripherals. The SP3222EBEY-L/TR provides the RS-232 side from the same 3.3V rail that powers the SBC SoC, eliminating any need for an external +/-12V converter. Its 250 kbps ceiling is well above typical terminal-baud rates (115200), and the small TSSOP-20 footprint preserves board real estate for SoC, memory, and Ethernet PHYs on compact SBC layouts.
Được đề xuất
Medical Device Service Ports
Patient monitors, infusion pumps, and diagnostic instruments often retain RS-232 service ports for biomed technicians to pull logs, run calibrations, and push firmware updates. The SP3222EBEY-L/TR's +/-15 kV HBM ESD protection on the bus pins and full EIA/TIA-232-F compliance provide a robust service interface that survives repeated cable insertions. Single 3.3V operation simplifies medical-device power trees that already have an isolated 3.3V rail for the host MCU, reducing isolation-stage complexity.
Được đề xuất
Networking Equipment Console Ports
Routers, switches, and base stations traditionally expose an RJ-45 RS-232 console port for out-of-band management. The SP3222EBEY-L/TR delivers true RS-232 swings from the same 3.3V supply that powers the switch ASIC and PHY, supporting 115200 to 250 kbps console baud rates that network-operators use to recover misconfigured gear. The 2/2 topology is sufficient for TxD/RxD plus RTS/CTS hardware flow control that Cisco-style console servers expect, and the 20-TSSOP footprint suits dense multi-port line cards.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho SP3222EBEY-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 | SP3222ECY-L/TR | SP3232ECT-L/TR | TRS3222EIPWR | MAX3222EIPWR | ST3222ECTR |
|---|---|---|---|---|---|---|
| Package | 20-TSSOP (Y) | 20-TSSOP (Y) - same | 20-TSSOP (Y) - same | 20-TSSOP (PW) - same | 20-TSSOP (PW) - same | 20-TSSOP - same |
| Brand | MaxLinear | MaxLinear (same brand) | MaxLinear (same brand) | Texas Instruments (cross-brand) | Texas Instruments (cross-brand) | STMicroelectronics (cross-brand) |
| Supply Voltage | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V |
| Data Rate | 250 kbps | 250 kbps | 250 kbps | 250 kbps | 250 kbps | 250 kbps |
| Drivers / Receivers | 2 / 2 | 2 / 2 | 3 / 2 (extra driver) | 2 / 2 | 2 / 2 | 2 / 2 |
| Low-Power Shutdown | Yes (1 µA, receivers active) | Yes | Yes | Yes | Yes | Yes |
| Charge-Pump Caps | 4 x 0.1 µF | 4 x 0.1 µF | 4 x 0.1 µF | 4 x 0.1 µF | 4 x 0.1 µF | 4 x 0.1 µF |
Bảo phân biệt quan trọng
- Single-supply 3.0V to 5.5V operation with four 0.1 µF charge-pump caps (vsLegacy 5V-only RS-232 parts requiring 1 µF capacitors and bipolar rails)
- 1 µA low-power shutdown with receivers active (vsSP3222B (non-EB) variants without shutdown)
- Pin-compatible cross-brand drop-in alternatives (TI, ST, MaxLinear) (vsSingle-source SP3222EB family only)
Ghi chú thiết kế
Place the four 0.1 µF charge-pump capacitors (C1+, C1-, C2+, C2-) within 2-3 mm of their respective pins to minimize parasitic inductance. Use X7R ceramic capacitors rated for at least 16V to handle the switched +5.5V/-5.5V rails. Keep charge-pump traces short and away from sensitive analog traces because the 250 kHz pump oscillator can couple noise into nearby signal paths.
Estimated: at VCC=3.3V and idle no-load conditions, the SP3222EBEY-L/TR draws roughly 1 mA quiescent current; in shutdown it drops to 1 µA. Decouple VCC with a 0.1 µF ceramic close to pin 12 plus a bulk 1 µF tantalum or ceramic at the IC supply entry point. If the host powers down the RS-232 link, drive SHDN low before VCC falls below 3.0V to avoid charge-pump latch-up.
Do not confuse the SP3222EB (2/2, 20-pin) with the SP3232EB (3/5, 28-pin) - the latter has more drivers/receivers but a different pinout. When migrating between EB and EC grades, verify that the SHDN polarity matches your MCU firmware: EB uses active-low SHDN. RS-232 receivers stay active in shutdown on the EB variant, so external ESD or surge events can still reach the host UART unless the link is power-cycled.
Route the RS-232 driver outputs (T1OUT, T2OUT) and receiver inputs (R1IN, R2IN) to the DB-9 connector with controlled 100-ohm differential-style traces and a ground return path. Add TVS diodes such as PESD5V0L1BA or SMBJ5.0CA at the connector for surge protection beyond the internal +/-15 kV HBM ESD. Keep the connector-side ground stitch short to the chassis ground to divert cable discharge events.
Thông tin tuân thủ
RoHS compliant and halogen-free per Future Electronics listing and MaxLinear product page. Not AEC-Q100 qualified (consumer/industrial grade). Conflict-minerals compliance per MaxLinear corporate policy.
