PI7C9X754ZBE - 4-UART 64-Byte FIFO Controller | Diodes
N.º da peça: PI7C9X754ZBE ✗ Fim de vidaPI7C9X754ZBE Visão geral
A UART, or universal asynchronous receiver/transmitter, is an interface controller that converts parallel data from a host processor into serial data and converts incoming serial data back into parallel data. In the product hierarchy, the PI7C9X754ZBE is a UART interface controller within the broader UART transceiver and serial-interface IC category. Its four independently controlled channels reduce the number of external I/O components needed in multi-port data acquisition, industrial control, and embedded communication systems.
Key features include 64-byte transmit and receive FIFOs, programmable FIFO trigger levels, transmit and receive FIFO level counters, and separate control for each UART. The serial inputs accept 5 V logic, allowing communication with peripherals using a higher logic voltage than the controller core. A selectable Intel-or-Motorola data-bus interface supports adaptation to different host processor conventions, while programmable sleep mode with automatic wake-up helps control power consumption in intermittently active systems.
The listed device also supports RS485 controller and IrDA 1.1 interface applications, according to DigiKey and GlobalSpec listings. The 48-TQFN package is intended for compact surface-mount designs, and the exposed-pad construction supports improved heat transfer where multiple channels operate continuously. Because the part is listed as obsolete by GlobalSpec, engineers should confirm availability and lifecycle position before committing new production designs.
A key design consideration is that operating voltage, FIFO behavior, modem-control signals, interrupt architecture, and the selected bus protocol must be verified against the complete manufacturer datasheet before layout. Although the part provides a compact four-channel UART solution, legacy software drivers and register programming may require more effort than with a modern USB-bridge or isolated serial-interface device.
Alternativas drop-in para PI7C9X754ZBE — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Nenhuma alternativa drop-in disponível para este produto.
Solicitar alternativasPI7C9X754ZBE Classificações máximas e características elétricas
| Device Type | Quad UART interface controller |
| Number of UART Channels | 4 channels |
| Core Supply Voltage | 1.62 V to 3.6 V |
| Serial Input Tolerance | 5 V tolerant |
| Transmit FIFO | 64 bytes per UART |
| Receive FIFO | 64 bytes per UART |
| Register Compatibility | 16C550-compatible register set |
| Parallel Data Bus | Intel or Motorola selectable |
| FIFO Trigger Control | Programmable TX and RX FIFO trigger levels |
| FIFO Status | Transmit and receive FIFO level counters |
| Power Management | Programmable sleep mode with automatic wake-up |
| Supported Interface Applications | RS485 controller and IrDA 1.1 |
| Temperatura de operação | -40 °C to +85 °C |
| Encapsulamento | 48-TQFN (7 x 7 mm), exposed pad |
| Tipo de montagem | Surface mount |
| Shipping Package | Tray |
| ECCN | EAR99 |
Guia de Configuração de Pinos do PI7C9X754ZBE tray
Configuração de pinos para PI7C9X754ZBE (pacote tray). Este dispositivo de potência possui terminais de gate, drain e source. Para pacotes não polarizados, consulte o datasheet do fabricante para a orientação exata do pino 1 e detalhes do footprint. Aplicações comuns incluem projeto de fontes de alimentação, acionamento de motores e comutação de cargas.
Nenhum dado detalhado de pinagem disponível para PI7C9X754ZBE.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
PI7C9X754ZBE é adequado para 6 aplicaçãos: Industrial Multi-Port Data Acquisition, RS485-Connected Control System, IrDA 1.1 Infrared Data Link, Embedded Service Console, Instrumentation and Test Equipment, Legacy Communication Adapter.
Industrial Multi-Port Data Acquisition
The PI7C9X754ZBE fits industrial data-acquisition equipment that must collect several slow or medium-speed serial streams without dedicating a separate UART controller to each port. Its four independently controlled channels and 64-byte transmit and receive FIFOs absorb bursts of data and expose programmable trigger levels for DMA or interrupt servicing. Operating from 1.62 V to 3.6 V allows integration with low-voltage embedded processors, while 5 V-tolerant serial inputs can simplify connections to legacy sensor or instrument interfaces. The design must still confirm the channel-specific modem-control signals and electrical transceiver requirements.
Recomendado
RS485-Connected Control System
The PI7C9X754ZBE can serve as the host-side UART controller in a four-port RS485 control system because the verified part description identifies RS485 controller support. Each channel provides a 16C550-compatible register set, 64-byte FIFOs, and programmable trigger levels, allowing a processor to manage multiple transceiver-connected nodes with predictable interrupt behavior. The controller does not provide RS485 line drivers or termination; those functions remain in external transceivers. Bus-direction timing, isolation strategy, and channel-specific modem-control signals must be validated in the target system.
Recomendado
IrDA 1.1 Infrared Data Link
The PI7C9X754ZBE suits legacy IrDA 1.1 equipment in which four serial channels are required and the controller core runs from a 1.62 V to 3.6 V supply. Its 64-byte FIFOs and independent per-UART control help organize bidirectional data movement, while the selectable Intel-or-Motorola parallel interface can simplify integration with a compatible host processor. An IrDA-compatible optical transceiver and its timing requirements remain external to the controller, so designers should verify baud rate, modulation timing, and supported IrDA signaling before committing the device.
Recomendado
Embedded Service Console
The PI7C9X754ZBE can consolidate several embedded service ports into one controller, reducing the host's pin and interrupt burden compared with four discrete UARTs. The four channels are independently controlled, and the 64-byte FIFOs permit burst buffering when a bootloader, sensor controller, or peripheral generates data asynchronously. Its 16C550-compatible register model is particularly useful when firmware already handles legacy UART peripherals. Because the part is obsolete, the design should include supply assurance and firmware verification for every register, interrupt, and wake-up condition before production release.
Recomendado
Instrumentation and Test Equipment
The PI7C9X754ZBE is appropriate for legacy instrumentation that needs several UART links to test fixtures, programmable instruments, or laboratory peripherals. Four independent channels reduce the number of controllers required, and the 64-byte FIFOs improve tolerance of burst traffic during automated test sequences. Its 5 V-tolerant serial inputs can simplify interfacing with established laboratory logic, while the 1.62 V to 3.6 V core supply works with modern embedded processors. Because the device is obsolete, new test platforms should compare an active controller before committing, and any firmware should preserve tested register and timing behavior.
Recomendado
Legacy Communication Adapter
The PI7C9X754ZBE can serve as the central serial engine in an adapter that bridges an embedded host to four legacy peripherals. The selectable Intel-or-Motorola data-bus interface allows the host-side software to follow either bus convention, and the 16C550-compatible register set eases driver portability from older UART designs. Programmable sleep mode with automatic wake-up may reduce power consumption in intermittently connected systems. A replacement strategy is essential because the device is obsolete, and bus timing, level shifting, and any RS485 or IrDA transceivers must be validated independently of the controller.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PI7C9X754ZBE — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | 48-TQFN (7 x 7 mm), exposed pad |
| UART Channels | 4 |
| Core Supply Voltage | 1.62 V to 3.6 V |
| Serial Input Tolerance | 5 V tolerant |
| Transmit FIFO | 64 bytes per UART |
| Receive FIFO | 64 bytes per UART |
| Register Set | 16C550-compatible |
| Data Bus Interface | Intel or Motorola selectable |
| Power Management | Programmable sleep mode with automatic wake-up |
| Interface Applications | RS485 controller and IrDA 1.1 |
| Operating Temperature | -40 °C to +85 °C |
| Lifecycle Status | Obsolete |
| Unit Price | Quotation required; no verified numeric price in supplied data as of 2026-10-28 |
Principais diferenciais
- Four independent UART channels with per-channel buffering (vs Single-channel generic UART controller)
- 16C550-compatible register architecture (vs Modern UART controller with a different register map)
- Selectable host data-bus convention (vs Fixed Intel-mode interface controller)
- Wide core range with higher-level serial inputs (vs Fixed-voltage UART interface)
- Low-power autonomous operation (vs Always-active UART controller)
Notas de projeto
Decouple the 1.62 V to 3.6 V core supply close to the device pins, and place bulk and high-frequency bypass capacitors according to the manufacturer datasheet layout. The 5 V-tolerant rating applies to the specified serial inputs; it does not authorize 5 V operation of the core supply or every I/O signal. Check the exact input and output voltage table before connecting legacy peripherals, and do not permit an unused serial input to float above the permitted level.
Route the compact 48-TQFN footprint with fanout that follows the datasheet land pattern, paying particular attention to the exposed thermal pad and its ground connection. Because a complete verified pin table was not present in the supplied sources, do not infer the pin map from a 48-pin count alone. Preserve pin compatibility only after comparing each UART, interrupt, modem-control, clock, and supply pad against the manufacturer package drawing and the proposed replacement part.
Treat obsolete status as a sourcing and lifecycle risk rather than merely a distributor listing. GlobalSpec lists the PI7C9X754ZBE as obsolete, so any continued supply should be backed by a documented quotation, traceability, remaining-life statement, and manufacturer position. Do not infer a drop-in replacement from the presence of four UART channels; drop-in qualification requires the same 48-TQFN pin map, compatible I/O levels, equivalent register behavior, and an acceptable supply roadmap.
Configure TX and RX FIFO trigger levels according to the worst-case host-service latency rather than using the maximum FIFO depth as the only design criterion. The 64-byte FIFOs absorb serial bursts, but they do not guarantee lossless operation if the host stalls indefinitely. Validate interrupt latency, DMA behavior, receive-overrun handling, and sleep-mode wake-up conditions in the assembled system, especially on long or noisy RS485 links.
Informações de conformidade
GlobalSpec identifies EAR99 classification, but the supplied verified data does not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. Automotive qualification data was not supplied, so AEC-Q100 status is treated as not applicable rather than qualified.
