TRSF3222CPW - 3V-5.5V RS-232 Transceiver, 2/2 Drivers | TI TSSOP-20
MPN: TRSF3222CPW ✓ Hoạt độngTRSF3222CPW Tóm tắt
A line transceiver is an interface device that bridges a logic-level UART (universal asynchronous receiver/transmitter) on a host microcontroller with the RS-232 standard, which swings between +12V and -12V on the bus side. It sits within the Interface IC hierarchy (RS-232 transceiver -> line transceiver -> interface IC -> integrated circuit) and converts TTL/CMOS logic levels to TIA/EIA-232-F compliant voltage levels while protecting the host from ESD events on the cable side.
The TRSF3222CPW integrates a dual charge-pump that generates the required +5.5V and -5.5V rails from a single 3.3V supply using four small 0.1 uF external capacitors. Standby current is typically 1 uA, supporting low-power portable designs. The receivers remain active in shutdown, allowing wake-up characters to be detected without waking the host. ESD protection exceeds +/-15 kV HBM on the bus pins.
Typical applications include industrial point-of-sale terminals, factory automation equipment, portable diagnostic instruments, and battery-powered barcode scanners where 3.3V logic must communicate with legacy RS-232 peripherals. The wide 3.0V-5.5V supply range also makes the part suitable for USB-to-serial bridges and embedded computing modules.
When designing with this device, place the four charge-pump capacitors as close to the IC as possible to minimize loop inductance. The TSSOP-20 footprint requires standard surface-mount assembly with a maximum reflow temperature per JEDEC J-STD-020. Decouple VCC with a 0.1 uF ceramic plus a bulk tantalum if the supply impedance is high.
Bộ thay thế dễ dàng lắp đặt cho TRSF3222CPW — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
TRSF3222ECPWR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TRSF3222IPWRG4
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TRSF3232EIPWR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TRSF3221ECPWR
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
TRSF3222CPW Thông số kỹ thuật
| Chức năng | Line Transceiver |
| Number of Drivers/Receivers | 2/2 |
| Protocol | RS-232 |
| Tốc độ dữ liệu | 1 Mbit/s (max) |
| Supply Voltage (VCC) | 3.0 V to 5.5 V |
| External Capacitors Required | 4 x 0.1 uF |
| Standby Current | 1 uA (typ) |
| ESD Protection (HBM, bus pins) | +/-15 kV |
| Logic Input Compatibility | 5-V logic input with 3.3-V VCC |
| Nhiệt độ hoạt động | 0 C to +70 C (commercial grade) |
| Hộp | 20-TSSOP (0.173 in / 4.40 mm body width) |
| Kiểu lắp đặt | Surface Mount |
| Terminal Form | Gull Wing |
| Cấp MSL | 1 |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân TRSF3222CPW
| Chân 1 | C1+ — Charge-pump capacitor 1 positive terminal |
| Chân 2 | V+ — Charge-pump generated +5.5V supply |
| Chân 3 | C1- — Charge-pump capacitor 1 negative terminal |
| Chân 4 | C2+ — Charge-pump capacitor 2 positive terminal |
| Chân 5 | C2- — Charge-pump capacitor 2 negative terminal |
| Chân 6 | V- — Charge-pump generated -5.5V supply |
| Chân 7 | DOUT2 — RS-232 driver 2 output (bus side) |
| Chân 8 | RIN2 — RS-232 receiver 2 input (bus side) |
| Chân 9 | ROUT2 — TTL/CMOS receiver 2 output (logic side) |
| Chân 10 | DIN2 — TTL/CMOS driver 2 input (logic side) |
| Chân 11 | DIN1 — TTL/CMOS driver 1 input (logic side) |
| Chân 12 | ROUT1 — TTL/CMOS receiver 1 output (logic side) |
| Chân 13 | RIN1 — RS-232 receiver 1 input (bus side) |
| Chân 14 | DOUT1 — RS-232 driver 1 output (bus side) |
| Chân 15 | GND — Ground |
| Chân 16 | VCC — 3.0V to 5.5V supply input |
| Chân 17 | FORCEOFF — Force shutdown control (active low, drives drivers to high-Z) |
| Chân 18 | INVALID — Valid RS-232 signal indicator output |
| Chân 19 | FORCEON — Force on control (active low, overrides auto-shutdown) |
| Chân 20 | READY — Ready output indicating charge pump is settled |
Ứng dụng tiêu biểu
TRSF3222CPW phù hợp cho 6 Áp dụngs: Industrial Point-of-Sale (POS) Terminals, Factory Automation and PLC Communication Ports, Portable Battery-Powered Diagnostic Instruments, USB-to-Serial Bridge Dongles, Embedded Computing Modules and Single-Board Computers, Barcode Scanners and Retail Handhelds.
Industrial Point-of-Sale (POS) Terminals
The TRSF3222CPW provides the RS-232 voltage translation between the 3.3V host MCU and legacy POS peripherals such as receipt printers, cash drawers, and barcode scanners. Its 1 Mbit/s data rate supports modern printer firmware update streams, while the +/-15 kV HBM ESD rating on the bus pins protects against static discharge from operators repeatedly plugging cables into the RJ-45 jack. The 3.0V to 5.5V supply range allows direct connection to either a Li-ion battery stack or a 5V regulated rail, simplifying power tree design in space-constrained countertop terminals. The TSSOP-20 footprint fits within the keep-out zone of the RJ-45 connector shield.
Được đề xuất
Factory Automation and PLC Communication Ports
In factory-floor PLCs and HMI panels, the TRSF3222CPW bridges the 3.3V UART of the industrial MCU to RS-232 programming ports and legacy equipment. Its 1 Mbit/s throughput exceeds the 115.2 kbit/s required for Siemens S7 and Allen-Bradley DF1 protocols, providing headroom for diagnostic and firmware-download streams. The wide 3.0V-5.5V input range tolerates the noisy 24V-to-5V rails typical of industrial power supplies. The TSSOP-20 package is compatible with automated optical inspection and is reflow-processable per JEDEC J-STD-020, suiting high-volume panel-builder production.
Được đề xuất
Portable Battery-Powered Diagnostic Instruments
Battery-powered diagnostic tools such as multimeters, oscilloscopes, and medical analyzers benefit from the TRSF3222CPW's 1 uA typical standby current and 3.0V minimum supply, both directly compatible with two-cell alkaline or single-cell Li-ion stacks. The TI part lets the host MCU enter deep sleep while the receiver stage remains active, so an incoming RS-232 trigger byte wakes the system without a separate ring-indicator circuit. The TSSOP-20 footprint occupies only 4.4 mm by 6.5 mm of board area, leaving room for the larger LCD, keypad, and isolated probe front-end typical of handheld instruments.
Được đề xuất
USB-to-Serial Bridge Dongles
USB-to-RS232 adapter cables pair a USB controller IC with the TRSF3222CPW to deliver a legacy DB9 port from any modern laptop that lacks native RS-232. The TI device's 1 Mbit/s ceiling exceeds the typical 921.6 kbit/s baud used by embedded firmware tools, ensuring transparent throughput without flow-control bottlenecks. Its small 0.1 uF charge-pump capacitors fit inside the dongle housing alongside the DB9 shell, and the commercial 0 C to +70 C grade is sufficient for indoor and field-service use. Designers prefer the TI part for proven second-source availability over Maxim equivalents.
Được đề xuất
Embedded Computing Modules and Single-Board Computers
Many SoM (system-on-module) and SBC (single-board computer) designs expose a UART header that needs RS-232 level translation to drive external modems or industrial sensors. The TRSF3222CPW slots between the 3.3V SoC UART pins and a DB9 or RJ-45 connector on the carrier board, providing +/-15 kV ESD protection at the user-accessible connector. Its TSSOP-20 form factor is compatible with hand-rework and reflow profiles used by hobby and industrial module makers, and the 1 Mbit/s data rate enables fast firmware-update downloads without flow-control handshaking.
Được đề xuất
Barcode Scanners and Retail Handhelds
Handheld barcode scanners and inventory terminals typically run from a single-cell Li-ion battery at 3.6V to 4.2V, with a 3.3V regulated rail for the host MCU and display. The TRSF3222CPW integrates cleanly into that 3.3V domain while providing RS-232 voltage swings needed to communicate with legacy warehouse-management system (WMS) cradles. Its 1 uA standby current extends shelf life between charges, and the TSSOP-20 package survives the drop-test and vibration profiles typical of retail-handheld qualification.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho TRSF3222CPW — 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 | TRSF3222ECPWR | TRSF3222IPWRG4 | TRSF3232EIPWR | TRSF3221ECPWR |
|---|---|---|---|---|---|
| Package | 20-TSSOP | 20-TSSOP - same | 20-TSSOP - same | 20-TSSOP - same | 20-TSSOP - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Drivers / Receivers | 2 / 2 | 2 / 2 | 2 / 2 | 3 / 5 | 1 / 1 |
| 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 |
| Data Rate | 1 Mbit/s | 1 Mbit/s | 1 Mbit/s | 1 Mbit/s | 1 Mbit/s |
| ESD (HBM, bus pins) | +/-15 kV | +/-15 kV (enhanced) | +/-15 kV | +/-15 kV | +/-15 kV |
| External Capacitors | 4 x 0.1 uF | 4 x 0.1 uF | 4 x 0.1 uF | 4 x 0.1 uF | 4 x 0.1 uF |
| Operating Temperature | 0 C to +70 C (commercial) | 0 C to +70 C | -40 C to +85 C (industrial) | -40 C to +85 C | 0 C to +70 C |
| Automotive Grade (AEC-Q100) | No | No | No | No | No |
Bảo phân biệt quan trọng
- Higher 1 Mbit/s data rate versus typical 250 kbit/s RS-232 (vsMAX3232)
- Charge pump uses 0.1 uF caps instead of 1 uF (vsMAX3232)
- Drop-in compatible with newer E variant for field upgrades (vsTRSF3222ECPWR)
Ghi chú thiết kế
Place the four 0.1 uF charge-pump capacitors (C1, C2, C3, C4) within 2 mm of the C1+/C1-/C2+/C2- pins to minimize switching-loop inductance. The TI datasheet typical-application circuit shows these caps connected to VCC, V+, GND, and V- with short, wide traces. A ground plane directly under the TSSOP-20 footprint reduces charge-pump radiated noise that could otherwise couple into adjacent analog stages.
Do not exceed the absolute maximum VCC of 6.0 V; even brief transients above 6 V can damage the charge-pump switches. Also avoid using capacitors larger than 0.47 uF on the charge-pump nodes - larger values slow the power-on ramp and may prevent the part from exiting shutdown properly. The TRSF3222CPW differs from the MAX3232 family in capacitor value, and swapping designs between vendors without re-evaluating the BOM is a common error.
Estimated: at full 1 Mbit/s data rate with 5.5V VCC driving a typical 5 kohm RS-232 load, internal dissipation is well under 50 mW and the TSSOP-20 package (theta_JA approximately 90 C/W on a 4-layer JEDEC test board) yields a junction rise of only 4-5 C above ambient. No heatsink is required; designers should still confirm thermal performance in sealed enclosures without forced airflow.
Thông tin tuân thủ
RoHS and lead-free per Vyrian listing and TI product page. Commercial temperature grade only; AEC-Q100 qualification not available in this family. Halogen-free status not explicitly stated in provided data.
