PI7C9X1172CLE - 33Mbps Dual UART Bridge | Diodes Incorporated
MPN: PI7C9X1172CLE ✓ نشطPI7C9X1172CLE نظرة عامة
A protocol bridge is an interface IC that translates commands and data between unlike communication buses. The PI7C9X1172 belongs to the interface-controller hierarchy, connecting an I2C-bus or SPI controller on the host side to two independent UART channels on the peripheral side. This arrangement allows a compact embedded system to use a serial processor interface while supporting two conventional serial ports, RS-485 links, or other UART-based equipment.
The PI7C9X1172's principal advantages include support for data rates as high as 33 Mbps, separate hardware and software flow-control mechanisms, and automatic control of RS-485 transmitter direction. Its eight programmable GPIO pins provide additional discrete digital signals without requiring a separate general-purpose I/O expander. A low-power operating mode is useful in battery-powered and handheld equipment where continuous high-speed operation would increase energy consumption.
Internally, the controller supports fractional baud-rate generation, allowing the programmed UART baud rate to be represented more precisely than with integer-only divider schemes. Hardware flow control uses modem-control signals, while software flow control can be handled through the bridge protocol. Automatic RS-485 direction control simplifies half-duplex transceiver implementations by reducing the amount of host software required to manage the transmit and receive intervals. An internal loopback and self-test mode can assist board bring-up and fault isolation.
Typical applications include industrial serial gateways, battery-powered data loggers, portable test equipment, RS-485 concentrators, embedded data-acquisition systems, and host adapters that must expose two UART channels through an I2C or SPI processor bus. These uses benefit from the device's combination of dual-channel UART connectivity, high supported data rate, programmable GPIO resources, and low-voltage operation.
Designers should account for signal integrity, voltage levels, flow-control timing, and the electrical requirements of attached UART transceivers when assigning the device. The 28-TSSOP footprint supports compact PCB layouts, but the bridge cannot directly drive a long RS-485 cable; an appropriate line transceiver remains required. Review the manufacturer datasheet for the complete pin-description table, electrical limits, register definitions, and recommended application circuit before releasing a design.
This product page combines the manufacturer's architecture and feature information with package details, interface-use guidance, practical design notes, and sourcing support for engineers evaluating the PI7C9X1172CLE. Use the Request a Quote form on this page for current commercial availability and lead-time information.
بدائل مباشرة لـ PI7C9X1172CLE — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
لا تتوفر بدائل متوافقة تمامًا لهذا المنتج.
اطلب بدائلPI7C9X1172CLE الحدود القصوى والخصائص الكهربائية
| Device Type | I2C-bus/SPI to dual-channel UART bridge controller |
| Maximum Data Rate | 33 Mbps |
| Supply Voltage Range | 1.62 V to 3.63 V |
| تيار التغذية | 6 mA |
| UART Channels | 2 channels |
| Host Interface | I2C-bus and SPI |
| Programmable GPIO | Up to 8 pins |
| Hardware Flow Control | Supported |
| Software Flow Control | Supported |
| Baud Rate Generation | Fractional baud-rate generator |
| RS-485 Direction Control | Automatic |
| Diagnostic Function | Internal loopback and self-test mode |
| Power Management | Low-power mode and low sleeping current |
| Reset Function | Soft reset |
| نطاق درجة حرارة التشغيل | -40 °C to 85 °C |
| العلبة | 28-pin TSSOP |
| نوع التركيب | Surface mount |
| Tube Quantity | 50 pieces |
دليل تكوين أطراف PI7C9X1172CLE 28-pin tssop
تكوين الأطراف لـ PI7C9X1172CLE (حزمة 28-pin tssop). يتميز جهاز الطاقة هذا بأطراف البوابة والمصرف والمصدر. بالنسبة للحزم غير المستقطبة، راجع ورقة بيانات الشركة المصنعة لمعرفة الاتجاه الدقيق للطرف 1 وتفاصيل البصمة. تشمل التطبيقات الشائعة تصميم مصادر الطاقة وتشغيل المحركات وتبديل الأحمال.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ PI7C9X1172CLE.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
PI7C9X1172CLE مناسب لـ 6 التطبيقs: Industrial Serial Gateway, Battery-Powered Data Logger, Portable Test and Measurement Equipment, RS-485 Concentrator, Embedded Data-Acquisition System, Handheld Accessory and Dongle.
Industrial Serial Gateway
The PI7C9X1172CLE is well suited to an industrial serial gateway because it connects one I2C or SPI host bus to two UART channels capable of operating at rates up to 33 Mbps. Each channel can serve a local controller, modem, or service interface while the host communicates through a common embedded processor bus. Hardware and software flow control support helps prevent overrun on busy links, while automatic RS-485 direction control simplifies half-duplex transceiver sequencing. The 28-TSSOP package also supports compact gateway hardware.
موصى به
Battery-Powered Data Logger
A battery-powered data logger can use the PI7C9X1172CLE to add two serial connections without dedicating multiple UART peripherals to the host processor. Its 1.62 V to 3.63 V operating range supports low-voltage embedded systems, and the low-power mode allows the bridge to remain inactive between acquisition intervals. Up to eight programmable GPIO pins can handle triggers, status indicators, or sensor-enable signals. Low sleeping current helps preserve battery life when combined with similarly efficient external transceivers and peripherals.
موصى به
Portable Test and Measurement Equipment
The PI7C9X1172CLE can expand a portable instrument that communicates through a short internal I2C or SPI link while driving two external UART ports. One channel may connect to a service interface and another to a sensor or legacy peripheral, reducing the need for separate bridge devices. Its loopback and self-test mode can help verify serial paths during production. Fractional baud-rate generation and flow-control support improve flexibility across instruments that use nonstandard or flow-controlled serial links.
موصى به
RS-485 Concentrator
In an RS-485 concentrator, the PI7C9X1172CLE can bridge a processor-side I2C or SPI bus to two UART channels, each associated with an RS-485 transceiver. Automatic RS-485 direction control reduces the host-side logic needed for half-duplex bus management, while the two-channel architecture supports compact multiport equipment. Flow control and programmable GPIO pins add supervisory functions such as link-state inputs or transceiver-enable signaling. The final design must account for isolation, surge protection, and termination outside the bridge IC.
موصى به
Embedded Data-Acquisition System
The PI7C9X1172CLE can connect two acquisition peripherals to a central embedded controller through UART while configuration and commands travel over I2C or SPI. The controller supports data rates up to 33 Mbps, allowing it to bridge high-speed local serial links without occupying multiple direct UART channels on the host. Flow control can protect slower peripherals, and programmable GPIO pins can provide ready, fault, or trigger signals. Designers should match transceiver levels and timing to each attached peripheral.
موصى به
Handheld Accessory and Dongle
A handheld accessory or interface dongle can use the PI7C9X1172CLE to provide dual-UART connectivity from a compact host module. The 28-TSSOP footprint preserves board area, and the low-voltage supply range supports embedded portable systems. Two UART channels can connect accessories such as a printer, configuration tool, or legacy peripheral without separate host bridges. Low-power operation is valuable when the product spends most of its time idle, although the complete accessory must also budget power for its line drivers and user interface.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PI7C9X1172CLE — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج |
|---|---|
| Device Type | I2C/SPI to dual-UART bridge controller |
| Brand | Diodes Incorporated |
| Package | 28-pin TSSOP |
| Maximum Data Rate | 33 Mbps |
| Supply Voltage Range | 1.62 V to 3.63 V |
| Supply Current | 6 mA |
| UART Channels | 2 |
| Programmable GPIO | Up to 8 pins |
| Flow Control | Hardware and software flow control |
| RS-485 Direction Control | Automatic |
| Operating Temperature Range | -40 °C to 85 °C |
ملاحظات التصميم
Route the I2C or SPI host signals and both UART channels as short, controlled-impedance traces where practical. Place the device close to the host processor to minimize host-bus capacitance and ringing, and position UART protection components near the external connectors. Follow the manufacturer pin-description table and recommended layout because signal assignments, supply pins, and exposed routing requirements must be matched to the exact package.
Use clean references and short return paths for the 1.62 V to 3.63 V supply rail, and decouple the device near its supply pins with the capacitance recommended by the manufacturer. For I2C, confirm pull-up values against bus capacitance and speed. For SPI, account for signal direction at each controller and host connection. UART signals should use an appropriate transceiver or level shifter when the attached equipment uses a different voltage domain.
The PI7C9X1172CLE is a UART bridge, not an RS-485 physical-layer transceiver. Do not connect a differential RS-485 bus directly to the UART pins; add a suitable line transceiver and verify direction-control timing. Also distinguish the bridge's supported data rate from the complete link's sustainable rate, which may be limited by cable length, transceiver speed, grounding, protection components, and the selected protocol.
The bridge's stated 6 mA supply current does not represent total application power. Include line drivers, pull resistors, isolation, protection, and attached peripherals in the power budget. For battery operation, use the low-power mode only after confirming wake-up behavior and bus-state expectations. Estimate average consumption from the active-current and sleep-current values in the manufacturer electrical data, plus the measured load attached to the GPIO and UART circuitry.
معلومات الامتثال
No explicit compliance declarations for the exact PI7C9X1172CLE ordering code were identified. Confirm RoHS, REACH, lead-free, halogen-free, conflict-minerals, and automotive qualification status from the manufacturer product documentation before production release.