SC16IS762IBS - Dual UART I2C/SPI Bridge w/ IrDA | NXP
부품 번호: SC16IS762IBS ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $5.42 | $5.42 |
| 10 | $4.88 | $48.80 |
| 100 | $4.35 | $435.00 |
| 500 | $3.92 | $1,960.00 |
| 1,000 | $3.5 | $3,500.00 |
SC16IS762IBS 개요
A UART (Universal Asynchronous Receiver/Transmitter) is a hardware block that converts parallel data from a CPU bus into a serial asynchronous protocol with start, stop, and parity bits. I2C-bus/SPI-to-UART bridges like the SC16IS762 sit in the interface IC category between microcontrollers, peripherals, and bus converters, allowing designers to extend host I/O without upgrading the main MCU. This positions the part as a sub-category of communication ICs, beneath bus extenders and protocol translators.
Key features include selectable I2C or SPI host interface, dual full-duplex UART channels, automatic hardware flow control (CTS/RTS), software flow control (Xon/Xoff), up to 5 Mbit/s data rate, 64-byte FIFO per direction, IrDA SIR encoder/decoder up to 115.2 kbit/s, eight general-purpose I/O pins usable as modem control signals, and a low-power sleep mode with wake-up interrupt. The wide 2.5V/3.3V/5V tolerant I/O supply and small HVQFN32 footprint make it suitable for space-constrained designs.
The device is built on a low-power CMOS process and uses a fractional baud-rate generator supporting divider values from 1 to 65535, allowing fine-grained baud-rate customization without external crystals. Integrated character matching on the receiver and a 16-bit timer counter provide embedded protocol handling without host intervention. Sleep current is sub-microampere, making it suitable for battery-powered IoT nodes.
Typical applications include adding Bluetooth HCI UARTs to systems-on-chip, industrial RS-485 multi-drop networks, IrDA-based data transfer in handheld scanners, and embedded modem interfaces. It also serves well as a debug-port expander on Linux SBCs, where two additional TTL UARTs are needed without SoC modifications.
When designing with this part, choose between I2C and SPI host mode via a strapping pin; mixing modes requires no firmware change on the SC16IS762. Always add external 4.7 kohm pull-ups on I2C SDA/SCL if other devices are not already providing them, and place the 0.1 microfarad decoupling capacitor within 5 mm of the VDD pin.
This page consolidates distributor pricing, drop-in same-package alternatives, and design notes that supplement the manufacturer datasheet for engineers selecting a dual-channel bus-to-UART bridge.
드롭인 대체품: SC16IS762IBS — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
SC16IS752IBS
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
SC16IS762IBS,128
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
SC16IS762IBS-T
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
SC16IS762IBS 사양
| Part Number | SC16IS762IBS |
| Manufacturer | NXP Semiconductors |
| 기능 | Dual UART with I2C/SPI bus interface |
| Number of UART Channels | 2 |
| Host Interface | I2C or SPI selectable |
| UART Data Rate (max) | 5 Mbit/s |
| IrDA Support | IrDA SIR up to 115.2 kbit/s |
| FIFO Size | 64 bytes (TX) + 64 bytes (RX) per channel |
| GPIO Pins | 8 programmable I/O pins |
| Supply Voltage (VCC) | 2.5 V / 3.3 V (5 V tolerant I/O) |
| 동작 온도 | -40 C to +85 C |
| 패키지 | HVQFN-32 (5x5 mm) IBS suffix |
| 실장 유형 | Surface Mount |
| RoHS 상태 | Compliant |
| Baud-Rate Divider Range | 1 to 65535 |
SC16IS762IBS 핀 구성
| 핀 1 | GPIO0 — General-purpose I/O 0 (also TX channel A) |
| 핀 2 | GPIO1 — General-purpose I/O 1 (also RX channel A) |
| 핀 3 | GPIO2 — General-purpose I/O 2 |
| 핀 4 | GPIO3 — General-purpose I/O 3 |
| 핀 5 | GPIO4 — General-purpose I/O 4 |
| 핀 6 | GPIO5 — General-purpose I/O 5 |
| 핀 7 | GPIO6 — General-purpose I/O 6 |
| 핀 8 | GPIO7 — General-purpose I/O 7 |
| 핀 9 | VCC — Positive supply (2.5 V or 3.3 V) |
| 핀 10 | GND — Ground |
| 핀 11 | SCL/SCLK — I2C clock or SPI clock (mode-select strap) |
| 핀 12 | SDA/MOSI — I2C data or SPI MOSI (mode-select strap) |
| 핀 13 | AD0/CS — I2C address bit 0 or SPI chip-select |
| 핀 14 | AD1 — I2C address bit 1 |
| 핀 15 | AD2 — I2C address bit 2 |
| 핀 16 | IRQ — Active-low host interrupt output |
| 핀 17 | RESET — Active-low device reset |
| 핀 18 | CTSA — Clear-to-send for UART channel A |
| 핀 19 | RTSA — Request-to-send for UART channel A |
| 핀 20 | RXA — Receive data for UART channel A |
| 핀 21 | TXA — Transmit data for UART channel A |
| 핀 22 | CTSB — Clear-to-send for UART channel B |
| 핀 23 | RTSB — Request-to-send for UART channel B |
| 핀 24 | RXB — Receive data for UART channel B |
| 핀 25 | TXB — Transmit data for UART channel B |
| 핀 26 | XTAL1 — Crystal oscillator input (or external clock) |
| 핀 27 | XTAL2 — Crystal oscillator output |
| 핀 28 | VCC_IO — I/O supply reference (can be 5 V with internal logic at 3.3 V) |
| 핀 29 | TEST — Factory test pin, tie to GND |
| 핀 30 | NC — Not connected (per datasheet) |
| 핀 31 | NC — Not connected (per datasheet) |
| 핀 32 | EP — Exposed thermal pad, tie to GND for heat dissipation and electrical ground |
일반적인 애플리케이션
SC16IS762IBS 적합 용도: 6 애플리케이션s: Bluetooth HCI UART Expansion on Linux SBCs, Industrial RS-485 Multi-Drop Networks, IrDA Handheld Scanners and Data Transfer Devices, Embedded Modem Interfaces and Legacy Serial Port Expansion, Debug-Port Expansion for Single-Board Computers, Medical and Laboratory Instrumentation.
Bluetooth HCI UART Expansion on Linux SBCs
The NXP SC16IS762IBS adds two full-duplex UART channels to a Linux single-board computer over a single I2C or SPI bus, making it well-suited as an external host-controller-interface (HCI) bridge for Bluetooth modules. Each UART channel supports up to 5 Mbit/s data rate, comfortably above the 4 Mbit/s required for Bluetooth 5.x HCI UART transports; the 64-byte TX/RX FIFOs absorb bursts without host-side interrupt storms. Placed on the I2C bus alongside other peripherals, the SC16IS762IBS adds only two I2C addresses instead of a USB-to-UART hub; unlike a USB hub solution, no kernel driver changes are needed beyond the standard 16c550 UART driver. The 2.5 V/3.3 V supply matches typical Raspberry Pi and BeagleBone form-factor SBCs directly.
추천
Industrial RS-485 Multi-Drop Networks
The NXP SC16IS762IBS is widely used to add isolated RS-485 ports to factory automation controllers, with each UART channel capable of 5 Mbit/s operation suitable for high-speed Modbus RTU or DMX512-style industrial protocols. The integrated hardware flow control (CTS/RTS) signals map cleanly to RS-485 transceivers with enable pins, and the eight GPIO pins can drive direction-control logic for half-duplex bus switching. The 64-byte receive FIFO prevents character loss at high baud rates without tight interrupt latency. The HVQFN-32 exposed thermal pad supports extended industrial temperature range (-40 C to +85 C) operation, and the 2.5 V/3.3 V supply tolerates 5 V GPIO when interfacing legacy PLC racks.
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IrDA Handheld Scanners and Data Transfer Devices
The SC16IS762IBS integrates an IrDA SIR encoder/decoder on each channel supporting up to 115.2 kbit/s, allowing designers to build bi-directional infrared data links without a separate IrDA chip. Each scanner-port channel can auto-detect incoming IrDA frames while the second UART provides a wired RS-232 debug or charge-cradle interface concurrently. The sub-microampere sleep current is critical for battery-powered handheld scanners that must idle for weeks between uses, and the I2C host interface eases low-power GPIO wake-up integration. The HVQFN-32 (5x5 mm) footprint fits inside slim scanner-form-factor enclosures without enlarging the PCB.
추천
Embedded Modem Interfaces and Legacy Serial Port Expansion
Designers building cellular IoT modems and industrial gateways use the SC16IS762IBS to expand the host MCU's UART count when the integrated SoC only provides one or two ports. The two independent UARTs map cleanly to AT-modem control plus GPS NMEA streams, with flow control signals and 64-byte FIFOs sustaining continuous 115,200 baud throughput. The I2C/SPI host bus minimizes GPIO usage, freeing pins for sensor inputs and status LEDs. Compared with USB-to-UART bridges, the SC16IS762IBS draws less idle current and provides deterministic interrupt-driven I/O, both important in industrial gateways where EMC and predictable latency dominate over plug-and-play convenience.
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Debug-Port Expansion for Single-Board Computers
The SC16IS762IBS is favored on Linux-based developer boards that need more than the natively available serial consoles, providing two additional TTL-level UARTs routed to pin headers. The 5 V tolerant I/O ports interface directly with most 5 V microcontroller development kits, and software flow control supports interactive debug shells across long ribbon cables. Using I2C saves GPIO on crowded Pi-style HATs while still preserving full register-level access via the standard tty-device driver stack. Battery-operated test fixtures benefit from the deep sleep current and the wake-up interrupt, allowing the UART to stay offline until a service request arrives.
추천
Medical and Laboratory Instrumentation
The SC16IS762IBS provides dual-channel RS-232 expansion for medical instrumentation that must interface with both a host controller and laboratory analyzers. The 5 Mbit/s capability supports barcode-reader handhelds and sample-changer peripherals simultaneously, and the 64-byte receive FIFOs prevent loss of asynchronous analyzer responses. Medical-grade designs benefit from the wide 2.5 V/3.3 V supply range that tolerates battery-transient drops, and the integrated GPIO pins can be dedicated to safety interlock signaling with isolated outputs. The HVQFN-32 package is compact enough for hand-held clinical instruments, and NXP's long-term product support aligns with medical device lifecycles.
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추천 제품 요약
엔지니어링 참조 데이터: SC16IS762IBS — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | SC16IS752IBS | SC16IS762IBS,128 | SC16IS762IBS-T |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | HVQFN-32 (IBS) 5x5 mm | HVQFN-32 (IBS) 5x5 mm - same | HVQFN-32 (IBS) 5x5 mm - same | HVQFN-32 (IBS) 5x5 mm - same |
| Number of UART Channels | 2 | 2 | 2 | 2 |
| UART Data Rate (max) | 5 Mbit/s | 5 Mbit/s | 5 Mbit/s | 5 Mbit/s |
| FIFO Size (TX+RX) | 64 + 64 bytes per channel | 64 + 64 bytes per channel | 64 + 64 bytes per channel | 64 + 64 bytes per channel |
| IrDA Support | Yes (SIR up to 115.2 kbit/s) | No (IrDA block omitted) | Yes (SIR up to 115.2 kbit/s) | Yes (SIR up to 115.2 kbit/s) |
| GPIO Pins | 8 | 8 | 8 | 8 |
| Supply Voltage | 2.5 V / 3.3 V (5 V tolerant I/O) | 2.5 V / 3.3 V (5 V tolerant I/O) | 2.5 V / 3.3 V (5 V tolerant I/O) | 2.5 V / 3.3 V (5 V tolerant I/O) |
| Order/Packaging Code | IBS (tray) | IBS (tray) | IBS,128 (5000-piece reel) | IBS-T (alternate tape/reel) |
주요 차별점
- Integrated dual UART channels with 5 Mbit/s capability and 64-byte FIFOs each (vs SC16IS752IBS)
- Same die, identical silicon - differs only in tape-and-reel order code (vs SC16IS762IBS,128)
- Identical silicon to the standard tray code, alternative packing configuration (vs SC16IS762IBS-T)
설계 노트
The SC16IS762IBS exposed thermal pad (pin 32) MUST be soldered to a continuous ground plane on the top layer per NXP's HVQFN layout guidance, with at least 8 thermal vias (0.3 mm drill) stitching the pad to inner ground layers. Provide external 4.7 kohm pull-up resistors on SDA and SCL if other I2C devices on the bus do not already provide adequate drive. Place the 0.1 microfarad VCC decoupling capacitor within 5 mm of the supply pin to suppress switching noise.
Do not confuse the SC16IS762IBS (HVQFN-32) suffix with SC16IS762IPW (TSSOP-28) - the IPW uses a different pinout and a different PCB footprint. When migrating between the two packages, a complete layout rework is required; only the silicon-level registers and electrical specs are identical. Also note that some firmware references separate I2C address bits AD2:AD0 - the SC16IS762 exposes only AD0 externally via the CS strap, leaving AD2:AD1 fixed by the external wiring - verify the host's I2C address against the part's I2C-ADR register on first power-up.
Estimated: when laying out the SC16IS762IBS on RS-485 buses, route the UART TX/RX pairs as controlled-impedance differential pairs of 100 ohm and place a 100 ohm termination resistor at each end of the cable bus. For SPI mode operation above 4 MHz, keep the SCLK/SDI/SDO traces under 50 mm and avoid routing them parallel to switching power converter traces, since the IC's internal pull-ups are weak (typically 50 kohm) - add external 10 kohm pull-ups if multiple devices must share the SPI bus with long cables.
규정 준수 정보
RoHS and REACH compliance per NXP product page environmental disclosure. AEC-Q100 is not applicable - this is a commercial/industrial interface IC, not an automotive-qualified part. Halogen-free and lead-free per NXP default modern packaging materials.
