PI7C9X754ME - Quad UART with 64-Byte FIFO | Diodes
MPN: PI7C9X754ME ✓ AktifPI7C9X754ME Ringkasan
A universal asynchronous receiver/transmitter, or UART, is an interface controller that converts parallel data from a processor into serial transmissions and converts incoming serial data back into a parallel format. In the broader semiconductor hierarchy, this device belongs to interface ICs, where it sits between a host processor and serial communication links. Its four channels allow one controller to manage multiple independent data streams while sharing a common host interface.
Each UART includes a 64-byte transmit FIFO, a 64-byte receive FIFO, transmit and receive FIFO level counters, and programmable trigger levels. These functions support efficient DMA and interrupt-driven data transfer. The serial inputs accept 5 V levels even though the core supply range is 1.62 V to 3.6 V, allowing the device to interface with legacy peripheral signaling. Programmable sleep mode and automatic wake-up help reduce system activity when no data is being transferred.
The PI7C9X754ME uses a register-compatible 16C550 programming model while adding FIFO management and independent control of all four UART channels. Its 10 mA supply current, -40°C to +85°C operating-temperature range, and configurable Intel or Motorola bus interface make it suitable for embedded systems that require multiple protocol endpoints without allocating four separate UART controllers.
Typical applications include industrial RS485 controllers, IrDA-capable infrared links, multiport embedded data acquisition, serial concentrators, and communications equipment. In each case, the four independent FIFOs reduce the probability of receiver overrun and allow the host processor to service several channels through DMA or interrupts. The 100-MQFP package also provides ample routing and power-distribution flexibility on multilayer boards.
Designers should verify that the host bus voltage, interrupt structure, and serial-line interface match the target system. Because the operating supply is only 1.62 V to 3.6 V, external level-shifting or 5 V-tolerant interface components may still be required for connected peripherals. Power, ground, and signal routing must follow the datasheet recommendations to prevent data-integrity problems in simultaneous multi-channel traffic.
This product page combines verified manufacturer-family specifications, current distributor pricing, application guidance, and explicit data-gap disclosures. It also distinguishes confirmed characteristics from unavailable pin-level and drop-in replacement information so engineers can make sourcing and design decisions without relying on unverified claims.
Pilihan pengganti yang segera untuk PI7C9X754ME — sama paket, pin-pin kompatibel. Bahagian paket yang berbeza memerlukan kerja ulang PCB diasingkan.
Tiada pilihan pengganti yang segera untuk produk ini.
Minta AlternatifPI7C9X754ME Penilaian maksimum & Ciri-ciri Elektrik
| Device Type | Quad UART interface IC |
| Number of UART Channels | 4 channels |
| Supply Voltage Range | 1.62 V to 3.6 V |
| Arus Pemberi Arus | 10 mA |
| Serial Input Tolerance | 5 V tolerant |
| Transmit FIFO Capacity | 64 bytes per UART |
| Receive FIFO Capacity | 64 bytes per UART |
| Register Compatibility | 16C550-compatible |
| Data Bus Interface | Intel or Motorola selectable |
| RS485 Support | RS485 controller |
| Infrared Protocol Support | IrDA 1.1 |
| Power Management | Programmable sleep mode with automatic wake-up |
| FIFO Level Counters | Transmit and receive counters |
| FIFO Trigger Levels | Programmable for DMA and interrupt service |
| Gambaran Suhu Operasi | -40°C to +85°C |
| Kemasan | 100-MQFP (14 mm × 20 mm) |
| Jenis Pemasangan | Surface mount |
Panduan Konfigurasi Pin PI7C9X754ME 100-mqfp (14 mm × 20 mm)
Konfigurasi pin untuk PI7C9X754ME (100-mqfp (14 mm × 20 mm) pakai). Peranti kuasa ini mempunyai terminal kawat, buang, dan sumber. Untuk pakai non-polarized, rujuk dokumen pengeluar untuk orientasi pin 1 tepat dan perincian kebentuk.
Tiada data garisan pin yang diperoleh untuk PI7C9X754ME.
Rujuk kepada lembaran data untuk konfigurasi pin penuh.
Aplikasi Biasa
PI7C9X754ME patut untuk 6 aplikasis: Industrial RS485 Controller, IrDA Infrared Data Link, Multiport Serial Concentrator, Embedded Data-Acquisition System, Communications and Network Equipment, Low-Power Embedded Control Unit.
Industrial RS485 Controller
The PI7C9X754ME is suitable for an embedded controller that must manage several RS485 endpoints on one processor. Its four independently controlled UART channels reduce the need for separate interface ICs, while the 64-byte transmit and receive FIFOs reduce the frequency of processor interrupts during burst traffic. The verified 1.62 V to 3.6 V core supply is well suited to embedded 3.3 V systems. Because the device provides controller functionality rather than a complete physical layer, the design still needs suitable transceivers, protection components, bus termination, and protocol-specific timing checks.
IrDA Infrared Data Link
For IrDA 1.1 data exchange, the PI7C9X754ME provides four UART channels with IrDA 1.1 support and independent FIFO management. The 64-byte receive and transmit FIFOs can absorb short data bursts while the host handles protocol processing or DMA transfers, making the device useful in industrial handheld equipment, test systems, and short-range infrared controllers. Its selectable Intel or Motorola data-bus interface supports adaptation to different processor architectures. The physical infrared transmitter and receiver must be selected separately, and the complete link should be validated for optical, timing, and power-consumption requirements.
Multiport Serial Concentrator
The PI7C9X754ME fits a serial concentrator that combines four communication ports into a single host interface. Each UART has independent 64-byte FIFOs, level counters, and programmable trigger levels, allowing the processor to service active and inactive channels efficiently. The four-channel architecture reduces component count and simplifies software scheduling compared with four unrelated controller ICs. In a compact embedded design, however, the 100-MQFP package requires careful routing and adequate board area. Firmware must also handle channel-specific baud rates, parity, flow control, interrupts, and simultaneous traffic without corrupting FIFO boundaries.
Embedded Data-Acquisition System
A data-acquisition controller can use the PI7C9X754ME to collect data from four independent serial instruments or sensors. The large FIFOs provide temporary storage when several devices transmit simultaneously, while the -40°C to +85°C rated operating range supports industrial environments. The 16C550-compatible programming model can simplify driver development for legacy controller software. Signal conditioning, isolation, surge protection, and appropriate baud rates remain external design requirements. Engineers should test worst-case simultaneous receive traffic because FIFO capacity reduces overrun risk but does not guarantee unlimited burst handling or eliminate the need for flow control.
Communications and Network Equipment
The PI7C9X754ME can support multiple management, status, or service ports in communications equipment. Its 1.62 V to 3.6 V operation allows integration with low-voltage digital processors, and the 5 V-tolerant serial inputs ease compatibility with legacy equipment. Programmable sleep mode with automatic wake-up is useful in equipment where idle serial activity must not prevent a low-power state. The Intel or Motorola bus selection offers processor-interface flexibility, although firmware initialization must match the chosen mode. Production designs should confirm clocking, reset, interrupt sharing, and thermal performance for the final 100-MQFP layout.
Low-Power Embedded Control Unit
The PI7C9X754ME is appropriate for a control unit that needs multiple serial endpoints but cannot justify four separate UARTs. Programmable sleep mode and automatic wake-up can reduce activity when channels are idle, while the four-channel organization keeps software and board organization manageable. Its verified 10 mA supply-current figure provides a baseline for power-budget analysis, but actual consumption depends on operating mode, clock activity, and enabled interfaces. Designers should compare the complete system power budget, use shutdown paths where appropriate, and verify that wake-up behavior meets the product's latency requirements.
Data referensi kejuruteraan untuk PI7C9X754ME — perbandingan, panduan rancangan, dan maklumat kesediaan
Panduan Pilihan
Perbandingan dengan Gantian
| Parametr | Produk Ini |
|---|---|
| UART Channels | 4 |
| Supply Voltage Range | 1.62 V to 3.6 V |
| Supply Current | 10 mA |
| Transmit FIFO | 64 bytes per UART |
| Receive FIFO | 64 bytes per UART |
| Protocol Support | RS485 controller and IrDA 1.1 |
| Data Bus Interface | Intel or Motorola selectable |
| Package | 100-MQFP (14 mm × 20 mm) |
| Brand | Diodes Incorporated |
| Operating Temperature Range | -40°C to +85°C |
Penyeberangsung Jelas
- Four independently controlled serial channels (vsSingle-channel UART controller)
- FIFO depth on every channel (vsBasic 16C550 without FIFO)
- Programmable FIFO thresholds and counters (vsBasic 16C550-compatible implementation)
- Multiple interface and protocol options (vsSingle-protocol serial controller)
Catatan Desain
Power the PI7C9X754ME from a supply within its verified 1.62 V to 3.6 V range and place the minimum required bypass capacitors close to the supply and ground pins according to the manufacturer layout guidance. The listed 10 mA supply current is useful for an initial budget, but the final estimate should include the selected clock, enabled channels, sleep behavior, and I/O loading. Do not operate the supply above 3.6 V even though the serial inputs are specified as 5 V tolerant.
Treat the 100-MQFP footprint as a complete high-pin-count routing task and follow the manufacturer package drawing and recommended land pattern rather than approximating it from a generic 100-pin symbol. Keep serial and host-bus routing away from noisy power stages, maintain continuous ground planes, and verify signal integrity at the highest supported data rate. Because no complete verified pin table was present in the supplied web results, confirm every pin name and no-connect assignment directly against the datasheet before layout release.
Do not assume that any quad UART with the same number of channels is a drop-in replacement. Firmware can depend on 16C550-compatible register offsets, FIFO trigger-level behavior, interrupt sources, bus timing, modem-control signals, and clock configuration. A substitute must also use the same 100-MQFP pin assignments. Because no verified cross-brand or same-brand pin-compatible candidate was supplied, treat any proposed equivalent as a new design until its schematic, timing, and software requirements are compared.
Configure each of the four channels independently and validate worst-case simultaneous receive traffic. The 64-byte FIFOs improve burst tolerance, but they do not eliminate overruns when the host cannot service a channel quickly enough. Use the documented interrupt or DMA trigger behavior, apply flow control where available, and include FIFO-empty, FIFO-full, overrun, timeout, and error handling in the driver. Incorrect threshold programming can cause excessive interrupt traffic or missed service intervals.
Maklumat Kesediaan
The supplied verified web results do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. No compliance claims have been inferred from the distributor listings.
