PI7C9X1172BLE - I2C/SPI to Dual UART Bridge Controller | Diodes Inc
MPN: PI7C9X1172BLE ✓ פעילPI7C9X1172BLE סקירה
A UART bridge controller is a serial interface IC that translates a short-reach, chip-to-chip serial protocol into one or more asynchronous serial links. The PI7C9X1172 places an I2C-bus or SPI host port on one side and two independent UART channels on the other, so a microcontroller, SoC or FPGA can add two RS-232/RS-485-style serial ports over a bus it already has. In the wider hierarchy it sits as an interface controller between the embedded processing domain and the communications domain, alongside transceivers, level shifters and protocol converters.
Key features include dual UART channels operating up to 33 Mbps, 64-byte transmit and receive FIFOs per channel for host-burst tolerance, eight configurable GPIO that can be routed to interrupt or general use, and low operating and sleeping current for battery-powered designs. The I2C-bus interface is compliant with Standard-mode and Fast-mode specifications, and the SPI port offers an alternative host connection where higher clock rates or more pins are available.
Architecturally the device separates a synchronous host-side protocol engine from the two independent UART receivers and transmitters, each with its own FIFO, baud-rate generator and framing control. This lets a single host port service two full-duplex serial links simultaneously, and it is why the part fits compact handheld and battery-operated equipment where board area, standby current and cost dominate the design trade-off.
Typical applications include handheld POS and barcode terminals, industrial data-capture and test equipment, USB-to-dual-serial dongles, multifunction printers, and battery-powered portable instruments that need two legacy serial ports bridged onto an I2C or SPI host bus.
When designing around this device, keep the I2C pull-ups sized for the bus capacitance and the fastest mode you intend to run, confirm that the host firmware can service both FIFO interrupts, and note that the eight GPIO pins are shared resources that must be assigned in the pin-multiplexing configuration. Provide local decoupling close to the supply pins and respect the level-shift requirements of any external RS-232 or RS-485 transceiver.
This page consolidates the manufacturer interface specification, package and supply details, drop-in replacement options and applied design guidance in one place, giving engineers a faster path from part selection to a working schematic than the raw datasheet alone provides.
חלופות תחליף ישיר עבור PI7C9X1172BLE — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
PI7C9X1172BE
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
PI7C9X1172CM
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
PI7C9X1172BLT
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
PI7C9X1172BLE דירוגים מרביים ומאפיינים חשמליים
| Device Type | I2C-bus/SPI to dual-channel UART bridge controller |
| Number of UART Channels | 2 |
| Maximum Data Rate | 33 Mbps |
| FIFO Size | 64 bytes per channel (transmit and receive) |
| Programmable GPIO | 8 pins |
| מתח אספקה | 1.8 V, 2.5 V, 3.3 V |
| Host Protocol | I2C-bus (Standard-mode and Fast-mode compliant) or SPI |
| מארז / Case | 28-TSSOP (0.173 in, 4.40 mm width) |
| מספר פינים | 28 |
| סוג הרכבה | Surface Mount |
| Operating and Sleep Current | Low operating current and low sleeping current per the manufacturer product page |
| Data Lines | I2C SDA and SCL |
| סטטוס RoHS | Compliant (E-suffixed Pb-free ordering code) |
| Supplier Device Package | 28-TSSOP |
| Protocol | I2C / SPI to UART |
| Product Series | PI7C9X1172 |
מדריך תצורת פינים של PI7C9X1172BLE 28-tssop
תצורת פינים עבור PI7C9X1172BLE (מארזת 28-tssop). רכיב הספק זה כולל מסופי שער, ניקוז ומקור. במארזים לא מקוטבים, יש לעיין בגיליון הנתונים של היצרן לכיוון מדויק של פין 1 ולפרטי טביעת רגל. יישומים נפוצים כוללים תכנון ספקי כוח, הנעת מנועים והחלפת עומסים.
אין נתוני פריסת פינים מפורטים עבור PI7C9X1172BLE.
עיינו ב- גיליון נתונים עבור תצורת פינים מלאה.
יישומים טיפוסיים
PI7C9X1172BLE מתאים עבור 6 יישוםs: Handheld POS Terminals and Barcode Scanners, USB-to-Dual-Serial Dongle and Adapter, Industrial Data-Capture and Test Equipment, Battery-Powered Portable Instruments, Multifunction Printers and Label Printers, Serial Protocol Gateways and Converters.
Handheld POS Terminals and Barcode Scanners
The PI7C9X1172BLE lets a compact handheld terminal add two full serial ports without consuming two dedicated UART peripherals on the application processor. Because the device accepts an I2C-bus or SPI host connection, a Cortex-M based scanner can drive both channels over the bus it already uses, and the 64-byte FIFOs absorb burst traffic from a fast printer or a magnetic stripe reader. With a 28-TSSOP body only 4.40 mm wide and low sleeping current, the part suits battery-operated equipment where PCB area and standby drain dominate the design. The eight programmable GPIO can drive modem-control, reset or ready lines on the peripherals, removing discrete level-shifter logic.
מומלץ
USB-to-Dual-Serial Dongle and Adapter
A USB-to-dual-serial adapter normally needs a USB controller with two UART peripherals or an external bridge chip. The PI7C9X1172BLE provides the dual-channel UART side directly, supporting data rates up to 33 Mbps per channel with independent 64-byte transmit and receive FIFOs, so a small USB-to-UART IC can hand off both ports over SPI or I2C. The low operating and sleeping current keeps bus-powered dongles from drawing excess standby current from the USB port. Its 28-TSSOP package and small GPIO count make it equally suited to compact multi-port adapters, serial hubs and protocol gateways.
מומלץ
Industrial Data-Capture and Test Equipment
Industrial readers, barcode scanners and bench instruments often need to talk to legacy equipment over two RS-232 or RS-485 links while the controller itself runs a modern embedded OS. The PI7C9X1172BLE bridges that gap with two independent UART channels at up to 33 Mbps, and the 64-byte FIFOs isolate the host protocol from bursty serial traffic so the main processor is not stalled. Supply options of 1.8 V, 2.5 V and 3.3 V allow the bridge to run from the same rail family as the host SoC, while the eight GPIO support modem-control, RTS/CTS override or isolated reset signalling on the connected instruments.
מומלץ
Battery-Powered Portable Instruments
Portable measurement instruments - logic analysers, field meters and calibrators - often need to stream data to a host while also logging to an internal serial device. The PI7C9X1172BLE fits because the manufacturer specifically targets cost-efficient handheld and battery-powered designs with low operating and sleeping current, and it runs directly from a 1.8 V, 2.5 V or 3.3 V system rail. The 28-TSSOP package is only 4.40 mm wide, so it fits under a display or inside a probe body. Two channels with independent 64-byte FIFOs let one I2C link serve both a streaming path and a control path without head-of-line blocking.
מומלץ
Multifunction Printers and Label Printers
Printers and label applicators frequently need to talk to a print engine, a cutter, a RFID reader and a host PC at the same time. The PI7C9X1172BLE provides two dedicated UART channels so the printer controller can multiplex command traffic to the engine and status traffic to the host over a single I2C-bus or SPI link. Data rates up to 33 Mbps leave ample margin for high-resolution raster transfer to the print head, and the 64-byte FIFOs decouple burst printing from the host's bus traffic. The eight programmable GPIO can drive paper sensors, cutter strobes and motor-enable lines directly.
מומלץ
Serial Protocol Gateways and Converters
Protocol gateways bridge legacy serial equipment into modern networks, and they frequently need more than one serial port to run a management channel alongside a data channel. The PI7C9X1172BLE gives such gateways two UART channels at up to 33 Mbps, each with independent FIFOs, so a management console and a high-throughput data path can operate simultaneously without interfering. Its host-side flexibility - choose I2C-bus or SPI depending on the network SoC available - makes it easy to reuse one bridge design across several gateway platforms. The small 28-TSSOP footprint preserves space for the Ethernet or wireless section of the board.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור PI7C9X1172BLE — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | PI7C9X1172BE | PI7C9X1172CM | PI7C9X1172BLT |
|---|---|---|---|---|
| Package | 28-TSSOP (4.40 mm width) | 28-TSSOP (4.40 mm width) - same | 28-TSSOP (4.40 mm width) - same | 28-TSSOP (4.40 mm width) - same |
| Brand | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated |
| UART Channels | 2 | 2 | 2 | 2 |
| Maximum Data Rate | 33 Mbps per channel | 33 Mbps per channel | 33 Mbps per channel | 33 Mbps per channel |
| FIFO Buffer | 64 bytes (transmit and receive) | 64 bytes (transmit and receive) | 64 bytes (transmit and receive) | 64 bytes (transmit and receive) |
| Programmable GPIO | 8 pins | 8 pins | 8 pins | 8 pins |
| Supply Voltage Options | 1.8 V, 2.5 V, 3.3 V | 1.8 V, 2.5 V, 3.3 V | 1.8 V, 2.5 V, 3.3 V | 1.8 V, 2.5 V, 3.3 V |
| Host Protocol | I2C-bus (Standard-mode / Fast-mode compliant) or SPI | I2C-bus or SPI | I2C-bus or SPI | I2C-bus or SPI |
| Number of Pins | 28 | 28 | 28 | 28 |
| Low Power / Sleep Current | Low operating and sleeping current (manufacturer product page) | Low operating and sleeping current | Low operating and sleeping current | Low operating and sleeping current |
| RoHS / Lead-Free Status | Compliant (E-suffixed order code) | Compliant | Compliant | Compliant |
מבדילים עיקריים
- Two independent UART channels at up to 33 Mbps with per-channel FIFOs (לעומתsingle-channel general-purpose UART bridges)
- Host port selectable as I2C-bus or SPI (לעומתI2C-only UART expanders)
- Eight programmable GPIO integrated alongside the serial channels (לעומתPI7C9X1172BE sibling order codes (same die))
- Low operating and sleeping current for battery-powered products (לעומתlarger multi-port USB-to-serial bridges)
הערות תכנון
The 28-TSSOP body is only 4.40 mm wide, so fanout from the 0.65 mm pitch pads is tight. Keep the supply decoupling capacitor on the shortest possible path directly between the supply and ground pins, and reserve a via immediately under the IC for ground return. Route the I2C SDA and SCL nets as a length-matched pair away from the UART transmit edges, and place the pull-up network at the bus master end of the segment rather than at the bridge, so the pull-up strength matches the total bus capacitance.
Estimate the host-bus current before fixing the supply rail: the PI7C9X1172BLE operates from 1.8 V, 2.5 V or 3.3 V and is specified for low operating and sleeping current, but the exact quiescent and active figures should be taken from the manufacturer datasheet. On battery-powered designs, confirm that the sleep mode of the bridge does not back-power the host I/O lines. Use the low-voltage option closest to the host rail to keep I/O levels matched and avoid level shifters, and verify the ripple on that rail against the I2C and UART signalling thresholds.
The two UART channels and the eight GPIO pins share limited multiplexing resources. Assign every pin in the pin-multiplexing configuration table in the manufacturer datasheet before layout, and avoid assuming that a GPIO can be repurposed as a hardware handshake line after the fact without changing firmware. Firmware must also service both FIFO interrupt sources: at high baud rates a 64-byte FIFO can overflow if the host poll or interrupt latency becomes long, so validate worst-case interrupt latency on the target processor before locking the design.
UART links running at up to 33 Mbps are edge-rate sensitive even over short PCB traces. Keep TX and RX routing away from switching nodes and from any DC-DC converter inductor area, and provide a solid ground plane directly under the device. When the bridge sits between a host and an external RS-232 or RS-485 transceiver, place the transceiver close to the connector so that the long, unprotected run is kept outside the board, and confirm that the transceiver's isolation and level-shift requirements are met rather than relying on the bridge's 3.3 V CMOS levels alone.
מידע על תאימות
The E-suffixed order code PI7C9X1172BLE is the lead-free, RoHS-compliant ordering option listed by the manufacturer. AEC-Q100 qualification, REACH declaration status and conflict-minerals reporting are not stated on the cited product pages and are recorded as unknown.
