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NXP Semiconductors SC16C754BIBM,157
- Part No.:
- SC16C754BIBM,157
- Manufacturer:
- NXP Semiconductors
- Package:
- 64-LQFP
- Datasheet:
-
SC16C754BIBM,157.pdf
- Description:
- IC UART QUAD 64BYTE 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,618
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Product details
Overview
SC16C754BIBM from NXP Semiconductors is a quad UART IC with 64-byte transmit/receive FIFOs, hardware/software flow control, and up to 5 Mbit/s data rate at 3.3 V or 5 V. It serves as a high-density serial interface controller in industrial communication gateways, multi-port terminal servers, and embedded systems requiring concurrent RS-232/RS-485 channel management.
For engineers reviewing the SC16C754BIBM datasheet, SC16C754BIBM pinout, SC16C754BIBM application, or SC16C754BIBM equivalent, key selection criteria include FIFO trigger programmability, auto-RTS/CTS timing behavior, 4-channel interrupt prioritization, and LQFP64 package compatibility with legacy SC16C654 designs.
Technical Context
The SC16C754BIBM implements four independent UART channels sharing an 8-bit parallel bus (D0–D7), address decoding (A0–A2), and individual chip-select lines (CSA–CSD). Each channel supports full modem control (RTS/CTS/DSR/DTR/RI/CD) and features dedicated interrupt outputs (INTA–INTD) with six-level prioritization.
Its enhanced architecture includes a Transmission Control Register (TCR) for independent RX FIFO halt/resume thresholds, a FIFO Ready register for consolidated TXRDY/RXRDY status, and an Enhanced Feature Register (EFR) enabling Xon/Xoff programmability, auto-flow control, and special character detection - all accessible via standard 16C550-compatible register mapping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 4 independent UARTs with fully isolated FIFOs and modem control logic |
| Data Rate | Up to 5 Mbit/s at 3.3 V or 5 V; 3 Mbit/s maximum at 2.5 V operation |
| FIFO Depth | 64-byte TX and RX FIFOs per channel, with error flags stored in RX FIFO |
| Flow Control | Hardware (auto-RTS/auto-CTS) and software (Xon/Xoff) with programmable thresholds |
| Supply Voltage | Supports 2.5 V, 3.3 V, and 5 V operation; 5 V tolerant on D0–D7 inputs only |
| Temperature Range | Industrial grade: −40 °C to +85 °C ambient operating range |
| Baud Rate Generator | Programmable divisor (1 to 65535) with optional prescaler divide-by-4 function |
Pinout & Package
LQFP64 package (7 × 7 × 1.4 mm body, SOT414-1); 64-pin quad flat lead frame with exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D7 | 8-bit bidirectional data bus | Transfers register contents between CPU and UART; D0 = LSB, used for all channel register access |
| A0–A2 | Address select inputs | Select internal register offset (0–7) within each UART channel's address space |
| CSA–CSD | Individual channel chip selects | Enable register access to UART A, B, C, or D independently; active LOW |
| TXA–TXD | Serial transmit outputs | Asynchronous TTL-level serial output per channel; disabled during local loopback |
| RXA–RXD | Serial receive inputs | TTL-level serial input per channel; internally disconnected during local loopback |
| RTSA–RTSD | Request-to-Send outputs | Active LOW RTS signals controlled by MCR[1] or auto-RTS logic based on RX FIFO level |
| CTSA–CTSD | Clear-to-Send inputs | Active LOW CTS signals enabling transmission when auto-CTS is enabled in EFR[7] |
| INTA–INTD | Channel-specific interrupt outputs | Active HIGH interrupts with priority encoding; high-impedance after reset |
| IOR / IOW | Read/write strobes | Control register read (IOR) or write (IOW) cycles; both active LOW |
| RESET | Global asynchronous reset | Active HIGH signal initializing registers and disabling TX/RX; latches CLKSEL state |
Key Features
| Feature | Design Value |
|---|---|
| Programmable FIFO trigger levels | Independent RX/TX FIFO interrupt and DMA trigger thresholds per channel via FCR and TLR registers |
| Auto-RTS/CTS flow control | Hardware-managed RTS assertion/deassertion tied to RX FIFO fill level; CTS monitoring halts TX without CPU intervention |
| Xon/Xoff software flow control | Configurable dual-character pairs (Xon1/Xoff1, Xon2/Xoff2) with optional "Xon Any" resume mode |
| Modem interface support | Full set of modem control signals (RTS/CTS/DSR/DTR/RI/CD) with status reporting in Modem Status Register (MSR) |
| Internal loopback diagnostics | Local loopback mode connects TX output to RX input internally, enabling self-test without external wiring |
| Sleep mode | Low-power sleep state with wake-on-RX activity or interrupt; retains register context |
Applications
| Industrial Terminal Server | Multi-Port Serial Gateway |
|---|---|
Use Scenario: Aggregating serial data from 4 PLCs, HMIs, and sensors into a single Ethernet-connected host. IC Role / Device Role / Timing Role: Quad UART handles concurrent full-duplex RS-232 links with independent baud rates and flow control per port. Use Value: 64-byte FIFOs reduce interrupt load by >90% vs. 16-byte FIFO UARTs at 115.2 kbps, enabling deterministic real-time response. |
Use Scenario: Bridging legacy RS-485 fieldbus devices to modern USB or TCP/IP networks in factory automation. IC Role / Device Role / Timing Role: Acts as serial protocol translator with hardware flow control preventing buffer overrun across mixed-speed links. Use Value: Auto-RTS/CTS coordination eliminates packet loss during burst transfers from high-throughput barcode scanners or weigh scales. |
| Embedded Communication Controller | Medical Device Interface Module |
Use Scenario: Providing four isolated serial ports in a Linux-based edge compute module for IoT sensor aggregation. IC Role / Device Role / Timing Role: Parallel-bus UART offloads CPU from bit-banging; supports Linux ttyS driver stack with standard ioctl() interface. Use Value: Programmable baud generator with 16-bit divisor enables precise 1.000 Mbps CAN-to-serial conversion without external clock synthesis. |
Use Scenario: Interfacing ECG monitors, infusion pumps, and lab analyzers to central nursing station via RS-232. IC Role / Device Role / Timing Role: Ensures reliable, low-latency serial handshaking under strict IEC 62304 safety requirements. Use Value: Complete status reporting (line break, framing, parity, FIFO overflow) enables real-time error logging and fail-safe channel disable. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad UART applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SC16C654IA68 | Pin-compatible but lacks TCR, FIFO Ready register, and enhanced EFR features; 16-byte FIFOs | Lower interrupt overhead tolerance; no auto-RTS/CTS or Xon/Xoff programmability | Choose for cost-sensitive legacy upgrades where enhanced flow control is unnecessary |
| TL16C754IPM | TI part with identical pinout and register map; supports same 5 Mbit/s rate but no 2.5 V operation | Requires 3.3 V or 5 V supply only; no industrial temp guarantee beyond −40 °C to +85 °C | Prefer when sourcing from TI-authorized channels or requiring TI-specific support documentation |
Compared with SC16C654IA68 and TL16C754IPM, the SC16C754BIBM delivers higher FIFO depth, finer-grained flow control, and broader voltage flexibility - making it optimal for new designs demanding robust multi-channel serial throughput and deterministic latency.
Availability
SC16C754BIBM is available at Aetrix Electronics and suitable for industrial terminal servers, multi-port serial gateways, and embedded communication controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SC16C754BIBM 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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications.
The SC16C754BIBM belongs to NXP's legacy high-performance UART product line, designed specifically for industrial-grade multi-serial-port systems requiring reliability, configurability, and backward compatibility with 16C550-family software stacks.
FAQ
What is the maximum data rate supported by the SC16C754BIBM?
The SC16C754BIBM supports up to 5 Mbit/s at 3.3 V or 5 V supply voltages. At 2.5 V operation, the maximum data rate is reduced to 3 Mbit/s. This performance is achieved using the internal baud rate generator with 16-bit divisor and optional prescaler, allowing precise timing for high-speed serial protocols without external clock components. The SC16C754BIBM maintains full functionality including FIFO buffering and flow control at all supported rates.
Does the SC16C754BIBM support hardware flow control on all four UART channels?
Yes, the SC16C754BIBM supports independent hardware flow control (auto-RTS/auto-CTS) on all four UART channels. Each channel has dedicated RTS and CTS pins (RTSA–RTSD, CTSA–CTSD), and the Enhanced Feature Register (EFR) allows per-channel enable/disable of auto-RTS (EFR[6]) and auto-CTS (EFR[7]). The Transmission Control Register (TCR) stores separate halt/resume thresholds for each channel's RX FIFO, enabling precise coordination of data flow without CPU intervention.
How does the SC16C754BIBM handle interrupt prioritization across its four channels?
The SC16C754BIBM implements a six-level prioritized interrupt system with dedicated INTA–INTD outputs per channel. Interrupt sources include receiver line status errors, RX time-out, RHR ready, THR empty, modem status changes, and Xoff detection. Priority is fixed per source type (e.g., Xoff interrupt = level 5, CTS/RTS change = level 6), not per channel - meaning simultaneous events across channels are resolved by source type priority, not channel number. The Interrupt Identification Register (IIR) reports pending interrupt type and channel context.
Can the SC16C754BIBM operate at 2.5 V, and what limitations apply?
Yes, the SC16C754BIBM supports 2.5 V operation, but with a reduced maximum data rate of 3 Mbit/s (vs. 5 Mbit/s at 3.3 V or 5 V). All other features - including 64-byte FIFOs, auto-flow control, software flow control, and modem signaling - remain fully functional. The device maintains industrial temperature range (−40 °C to +85 °C) and 5 V tolerance on D0–D7 inputs at 2.5 V supply. No configuration changes are required; voltage selection is handled automatically by internal regulation.
What package type is used for the SC16C754BIBM, and are pin-compatible alternatives available?
The SC16C754BIBM uses the LQFP64 package (7 × 7 × 1.4 mm, SOT414-1). It is pin-compatible with SC16C654IA68 and TL16C754, though those variants use PLCC68 or LQFP80 packages. The LQFP64 footprint allows direct drop-in replacement in existing SC16C654 layouts, provided PCB land patterns match SOT414-1 mechanical dimensions. Key differences include absence of CLKSEL and INTSEL pins on LQFP64 (internally tied to VCC/GND), which simplifies routing versus larger packages.
SC16C754BIBM,157 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 64-LQFP
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Obsolete
- Features:
- -
- Number of Channels:
- 4, QUART
- FIFO's:
- 64 Byte
- Protocol:
- -
- Data Rate (Max):
- 5Mbps
- Voltage - Supply:
- 2.5V, 3.3V, 5V
- With Auto Flow Control:
- Yes
- With IrDA Encoder/Decoder:
- -
- With False Start Bit Detection:
- Yes
- With Modem Control:
- Yes
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-LQFP (7x7)
SC16C754BIBM,157 FAQ
1.How can I place an order for SC16C754BIBM,157 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC16C754BIBM,157 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 SC16C754BIBM,157 reliable?
The price and inventory of SC16C754BIBM,157 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC16C754BIBM,157 is usually 5 days.
3.What payment methods are accepted for SC16C754BIBM,157?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC16C754BIBM,157 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC16C754BIBM,157?
SC16C754BIBM,157 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC16C754BIBM,157 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 SC16C754BIBM,157?
For technical support, including SC16C754BIBM,157 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC16C754BIBM,157 requirements.
6.How does Aetrix verify that SC16C754BIBM,157 is sourced from the original manufacturer or authorized distributors?
All SC16C754BIBM,157 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 SC16C754BIBM,157 meets industry standards.
7.What is the process for return or replacement of SC16C754BIBM,157?
All SC16C754BIBM,157 units undergo pre-shipment inspection (PSI). If there is an issue with SC16C754BIBM,157, 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 SC16C754BIBM,157 part is unused and in its original packaging.
Return procedure for SC16C754BIBM,157:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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