My Inquiry
My Account
Diodes Incorporated PI7C9X760ACLEX
- Part No.:
- PI7C9X760ACLEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Controllers
- Package:
- -
- Datasheet:
-
PI7C9X760ACLEX.pdf
- Description:
- IC I2C/SPI TO UART BRIDGE 3K
- Quantity:
- Payment:
- Shipping:
Inventory:4,681
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PI7C9X760ACLEX from Diodes Incorporated is a single-channel I²C-bus/SPI-to-UART bridge controller with 64-byte TX/RX FIFOs, backward-compatible register mapping to the 16C450 UART, and support for hardware/software flow control, RS-485 direction control, and IrDA SIR up to 1.152 Mbps. It operates at 1.8V/2.5V/3.3V and targets embedded serial interface bridging in space-constrained industrial and mobile systems.
For engineers reviewing the PI7C9X760ACLEX datasheet, PI7C9X760ACLEX pinout, PI7C9X760ACLEX application, or PI7C9X760ACLEX equivalent, key selection considerations include its dual-interface flexibility (I²C or SPI host side), programmable FIFO trigger levels, auto RTS/CTS implementation, GPIO expandability, and compatibility with legacy 16C450 software stacks.
Technical Context
The PI7C9X760ACLEX implements a fully bidirectional protocol converter between I²C-bus (fast-mode, up to 400 kHz) or SPI (mode 0, slave-only, up to 33 MHz) and a UART supporting RS-232/RS-422/RS-485 physical layers. Its register set mirrors the 16C450 architecture while extending functionality via Enhanced Feature Registers (EFR), Transmission Control Register (TCR), and Trigger Level Register (TLR).
It integrates autonomous flow control logic: Auto-RTS deasserts when RX FIFO reaches a programmable halt level (TCR[3:0]), and reasserts upon falling below a resume level (TCR[7:4]); Auto-CTS gates transmission based on external CTS state, eliminating overrun errors without CPU intervention. The device also supports automatic RS-485 driver direction control via RTS polarity inversion and built-in IrDA encoder/decoder.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Interface Modes | I²C-bus (slave, fast-mode) or SPI (slave, mode 0); selected by I2C/SPI pin logic level |
| UART Data Rate | Up to 16 Mbps (4× sampling clock); fractional baud rate generator with 16-bit divisor |
| FIFO Depth | 64-byte transmit and receive buffers with error status tagging (RX FIFO) |
| GPIO Pins | Eight user-programmable I/O pins (GPIO0–GPIO7), configurable as modem control signals (DSR/DTR/CD/RI) |
| Supply Voltage | 1.8 V, 2.5 V, or 3.3 V operation; low standby current at 3.3 V |
| IrDA Support | SIR mode up to 115.2 kbps (standard) or 1.152 Mbps (optional); integrated encoder/decoder |
| Package | 24-contact TQFN (ZD), 4 mm × 4 mm, exposed thermal pad (VSS) |
Pinout & Package
The PI7C9X760ACLEX is housed in a 24-pin TQFN (ZD) package with an exposed center thermal pad that must be soldered to PCB ground for thermal and electrical integrity. Pin 1 index is marked by a dot or notch; pin numbering follows standard QFN convention (counterclockwise from index corner).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low asynchronous reset input; ≥40 ns pulse required to initialize registers and disable outputs |
| 2, 3 | XTAL1 / XTAL2 | Crystal oscillator inputs (24 MHz max) or external clock input (64 MHz max); internal oscillator circuit |
| 4, 16 | VDD / VSS | Primary power supply (1.8/2.5/3.3 V) and ground; center pad is VSS and must be connected to PCB ground plane |
| 5 | I2C/SPI | Interface select: HIGH = I²C mode, LOW = SPI mode; determines function of pins 6–10 |
| 6, 7 | CS/A0 / SI/A1 | In SPI mode: chip select (active-low) and data input; in I²C mode: address bits A0/A1 for 7-bit slave address |
| 8 | SO | SPI data output (tri-state); undefined (NC) in I²C mode |
| 9, 10 | SCL/SCLK / SDA | I²C clock/data (open-drain) or SPI clock/data input; SDA pulled high externally via 1 kΩ (3.3 V) or 1.5 kΩ (2.5 V) |
| 11 | IRQ | Open-drain interrupt output (active-low); requires external pull-up resistor to VDD |
| 12–15, 17–20 | GPIO0–GPIO3 / GPIO4–GPIO7 | Eight general-purpose I/Os; GPIO4–GPIO7 double-function as DSR/DTR/CD/RI modem control signals |
| 21 | RTS | UART request-to-send output (active-low); used for RS-485 direction control and hardware flow control |
| 22 | CTS | UART clear-to-send input (active-low); enables auto-CTS flow control when EFR[7] = 1 |
| 23, 24 | TX / RX | Full-duplex UART transmitter output and receiver input; loopback mode disables pins and routes internally |
Key Features
| Feature | Design Value |
|---|---|
| 16C450 register compatibility | Enables drop-in replacement in legacy UART driver stacks without firmware modification |
| Programmable FIFO trigger levels | Independent RX/TX interrupt thresholds via TLR register, reducing host CPU polling overhead |
| Auto RTS/CTS hardware flow control | Eliminates UART overrun errors by dynamically gating TX based on RX FIFO occupancy |
| RS-485 driver direction control | Automatic half-duplex bus control using RTS signal polarity and inversion capability |
| Dual Xon/Xoff software flow control | Supports two independent character pairs for transmit/receive flow management, enhancing protocol robustness |
| Built-in IrDA SIR transceiver | Removes need for external IrDA PHY; supports both standard (115.2 kbps) and high-speed (1.152 Mbps) modes |
Applications
| Industrial Automation Gateway | Mobile Point-of-Sale Terminal |
|---|---|
|
Use Scenario: Connecting legacy RS-485 field sensors to an I²C-based microcontroller in a PLC backplane. IC Role / Device Role / Timing Role: Protocol bridge converting I²C commands from MCU into UART frames for Modbus RTU over RS-485. Use Value: Enables deterministic communication using Auto-RTS to prevent buffer overflow during burst sensor reads, while GPIO pins monitor DSR/CD for device presence. |
Use Scenario: Integrating barcode scanner and thermal printer interfaces into a compact Android-based POS handheld. IC Role / Device Role / Timing Role: SPI-to-UART bridge allowing main SoC to manage multiple serial peripherals via shared SPI bus. Use Value: Reduces BOM count by consolidating UART peripherals; 64-byte FIFOs absorb timing jitter from Android OS scheduling delays. |
| Battery-Powered IoT Sensor Hub | Embedded Networking Appliance |
|
Use Scenario: Aggregating BLE and Zigbee sensor data and forwarding via UART to cellular modem in ultra-low-power edge node. IC Role / Device Role / Timing Role: Low-voltage UART bridge (1.8 V operation) with programmable sleep current and IRQ-driven wake-up. Use Value: Extends battery life via 3.3 V standby current specification and software reset capability-no external reset IC needed. |
Use Scenario: Adding isolated serial console access to a managed Ethernet switch using RS-232 debug port. IC Role / Device Role / Timing Role: I²C-to-UART interface enabling host CPU to expose serial console over system management bus. Use Value: Supports IrDA SIR for wireless console debugging; GPIOs repurposed as RI/DSR for modem handshake emulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar UART bridge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SC16IS752IPW | Two-channel I²C-to-UART with 64-byte FIFOs per channel; no SPI interface; no IrDA; 400 kHz I²C only | Lacks RS-485 direction control and GPIO flexibility; better suited for dual-peripheral bridging than single high-performance link | Select when dual UART channels are required and SPI host interface is unnecessary |
| MAX3107ETJ+ | Single-channel SPI-to-UART only; 128-byte FIFOs; no I²C option; no GPIOs; supports 230 kbps max UART rate | Higher FIFO depth but lower UART speed ceiling; no modem control pin mapping or RS-485 assist features | Select when SPI-only host interface suffices and maximum UART throughput < 230 kbps is acceptable |
Compared with SC16IS752IPW and MAX3107ETJ+, the PI7C9X760ACLEX uniquely combines dual-host-interface flexibility (I²C/SPI), RS-485 driver control, IrDA PHY integration, and full 16C450 register compatibility-making it optimal for cost-sensitive, space-constrained designs requiring interoperability with legacy drivers and multi-standard serial connectivity.
Availability
PI7C9X760ACLEX is available at Aetrix Electronics and suitable for industrial automation gateways, mobile point-of-sale terminals, and battery-powered IoT sensor hubs requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for PI7C9X760ACLEX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and integrated circuits, specializing in high-performance analog, logic, and interface solutions for industrial, computing, and consumer markets.
The PI7C9X760ACLEX belongs to Diodes' serial interface bridge product line, designed specifically to simplify migration from legacy UART-based systems to modern I²C- or SPI-based host architectures while preserving software investment and enabling compact, low-power implementations.
FAQ
What host interface protocols does the PI7C9X760ACLEX support?
The PI7C9X760ACLEX supports two mutually exclusive host-side interfaces: I²C-bus (fast-mode, up to 400 kHz, slave-only) or SPI (mode 0, slave-only, up to 33 MHz). Interface selection is determined by the logic level on the I2C/SPI pin at power-on; no runtime switching is supported. Both interfaces share identical UART register access behavior and interrupt handling.
How does the PI7C9X760ACLEX implement RS-485 half-duplex control?
The PI7C9X760ACLEX uses its RTS output pin to control RS-485 driver direction: RTS goes active-low when transmitting and inactive-high when receiving. It supports RTS polarity inversion via the Enhanced Feature Register (EFR[3]) to match driver enable logic (active-high or active-low). This eliminates need for external logic or delay timers in RS-485 transceiver control.
Can the GPIO pins be used simultaneously as modem control signals and general-purpose I/O?
No-GPIO4 through GPIO7 are multiplexed: they operate either as general-purpose I/Os or as dedicated modem control signals (DSR/DTR/CD/RI), selected via the GPIO Control Register (GCR). Once configured as modem pins, their I/O functionality is disabled. GPIO0–GPIO3 remain fully programmable I/Os regardless of modem configuration.
What is the role of the center thermal pad in the TQFN package?
The exposed center pad on the PI7C9X760ACLEX's 24-pin TQFN package is electrically and thermally connected to VSS. It must be soldered to a PCB copper pour tied to system ground to ensure proper thermal dissipation and stable reference potential for internal analog blocks-including the oscillator and IrDA transceiver-especially under sustained UART transmission loads.
PI7C9X760ACLEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- -
- Programmable:
- Not Verified
- Protocol:
- I2C
- Function:
- Bridge, I2C/SPI to UART
- Interface:
- UART
- Standards:
- -
- Voltage - Supply:
- -
- Current - Supply:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- -
- Grade:
- -
- Qualification:
- -
PI7C9X760ACLEX FAQ
1.How can I place an order for PI7C9X760ACLEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI7C9X760ACLEX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for PI7C9X760ACLEX reliable?
The price and inventory of PI7C9X760ACLEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI7C9X760ACLEX is usually 5 days.
3.What payment methods are accepted for PI7C9X760ACLEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI7C9X760ACLEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI7C9X760ACLEX?
PI7C9X760ACLEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI7C9X760ACLEX order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for PI7C9X760ACLEX?
For technical support, including PI7C9X760ACLEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI7C9X760ACLEX requirements.
6.How does Aetrix verify that PI7C9X760ACLEX is sourced from the original manufacturer or authorized distributors?
All PI7C9X760ACLEX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PI7C9X760ACLEX meets industry standards.
7.What is the process for return or replacement of PI7C9X760ACLEX?
All PI7C9X760ACLEX units undergo pre-shipment inspection (PSI). If there is an issue with PI7C9X760ACLEX, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The PI7C9X760ACLEX part is unused and in its original packaging.
Return procedure for PI7C9X760ACLEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PI7C9X760ACLEX Tags
-
PTN5150AHXMP
NXP USA Inc.
-
USB3740B-AI9-TR
Microchip Technology
-
USB3740B-AI2-TR
Microchip Technology
-
USB3300-EZK-TR
Microchip Technology
-
USB3300-EZK
Microchip Technology
-
FUSB340TMX
onsemi
-
FUSB302BMPX
onsemi
-
DP83826IRHBR
Texas Instruments
-
MCP2518FDT-E/QBB
Microchip Technology
-
FUSB302MPX
onsemi
-
MCP2518FDT-E/SL
Microchip Technology
-
FT260Q-R
FTDI, Future Technology Devices International Ltd
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
