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Texas Instruments NS16C2752TVS/NOPB
- Part No.:
- NS16C2752TVS/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 48-TQFP
- Datasheet:
-
NS16C2752TVS/NOPB.pdf
- Description:
- IC UART DUAL 64BYTE 48-TQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
NS16C2752TVS/NOPB from Texas Instruments is a dual-channel universal asynchronous receiver/transmitter (DUART) with independent 64-byte transmit/receive FIFOs per channel, 5 Mbit/s maximum data rate, 2.97–5.5 V supply operation, and industrial temperature range (–40°C to +85°C). It serves as a high-performance serial interface bridge in embedded communication controllers requiring robust flow control and legacy PC16552D compatibility.
For engineers reviewing the NS16C2752TVS/NOPB datasheet, NS16C2752TVS/NOPB pinout, NS16C2752TVS/NOPB application, or NS16C2752TVS/NOPB equivalent, key selection considerations include FIFO depth (64-byte vs. 16-byte), auto hardware/software flow control support, 5V-tolerant I/Os across full Vcc range, IrDA v1.0 encoding/decoding capability, and register-level compatibility with PC16552D and XR16L2752.
Technical Context
The NS16C2752TVS/NOPB implements two fully independent UART channels sharing only the CPU bus interface and crystal input. Each channel features a programmable baud generator dividing input clock by 1 to (2¹⁶ − 1) to produce a 16× sampling clock, supporting precise timing for high-speed serial links up to 5 Mbit/s.
It supports concurrent register access to both channels via CHSL pin, prioritized interrupt handling per channel (including RXRDY/TXRDY DMA signaling), and enhanced register set including EFR, XON/XOFF registers, and Alternate Function Register for MF pin reconfiguration (RXRDY/BAUDOUT/OUT2).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| FIFO Depth | 64 bytes per channel (Tx & Rx); enables burst transfers and reduces CPU interrupt load in high-throughput serial applications. |
| Max Data Rate | 5 Mbit/s; supports high-speed industrial and instrumentation serial links without external clock multiplication. |
| Supply Voltage | 2.97 V to 5.50 V; allows direct interfacing with 3.3 V or 5 V logic systems and mixed-voltage board designs. |
| I/O Tolerance | 5 V tolerant across full Vcc range; eliminates level-shifting requirements when connecting to legacy 5 V peripherals. |
| Temperature Range | –40°C to +85°C; qualified for industrial control, factory automation, and outdoor embedded equipment. |
| IrDA Support | Integrated IrDA v1.0 encoder/decoder; enables wireless infrared communication without external PHY components. |
| Flow Control | Auto hardware (CTS/RTS) and auto software (XON/XOFF) with configurable trigger levels; ensures reliable data integrity under variable load conditions. |
Pinout & Package
NS16C2752TVS/NOPB is housed in a 48-pin TQFP package (PFB0048A), RoHS-compliant and lead-free (NOPB suffix). Pin functions are defined per channel (1 or 2), with shared bus signals (D7–D0, A2–A0, CS, CHSL, RD, WR, MR) and dedicated serial I/O, MODEM control, and multi-function pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D7–D0 | Tri-state bidirectional data bus | Transfers register data, status, and control words between CPU and DUART; supports 8-bit parallel interface timing. |
| A2–A0 | Register address select | Selects one of eight internal registers per channel (e.g., RBR, THR, IER, LCR); DLAB bit determines divisor latch access. |
| TXRDY1/TXRDY2 | Transmit-ready output | Signals DMA controller when Tx FIFO is empty or below threshold; enables efficient zero-wait-state transmit buffering. |
| RXRDY1/RXRDY2 | Receive-ready output | Triggers DMA transfer when Rx FIFO reaches programmed trigger level or times out; minimizes latency in high-rate receive paths. |
| SOUT1/SOUT2 | Serial data output | Drives UART TX line or IrDA carrier-modulated output (MCR[6]=1); idle-high in UART mode, idle-low in IrDA mode. |
| SIN1/SIN2 | Serial data input | Accepts UART RX or IrDA demodulated input; requires 10 kΩ pull-up if unused in UART mode. |
| MF1/MF2 | Multi-function output | Configurable as OUT2 (general-purpose output), BAUDOUT (16× clock), or RXRDY (DMA request); selected via AFR bits. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent UART channels | Enables simultaneous RS-232/RS-485 or dual-serial peripheral interfaces on single IC-reducing BOM count and PCB footprint. |
| 64-byte FIFO per channel | Reduces CPU interrupt frequency by >75% compared to 16-byte FIFO (NS16C2552), critical for real-time deterministic response. |
| Auto hardware/software flow control | Eliminates data loss during transient overruns via automatic CTS/RTS assertion or XON/XOFF character generation-no firmware polling required. |
| PC16552D and XR16L2752 register compatibility | Allows drop-in replacement in legacy designs using standard 16550-family drivers and BIOS initialization sequences. |
| IrDA v1.0 integrated encoder/decoder | Supports 115.2 kbit/s infrared communication without external transceiver IC-simplifies remote HMI and diagnostic port design. |
Applications
| Industrial PLC Serial Gateway | Medical Device Dual-Port Interface |
|---|---|
Use Scenario: Connects PLC CPU to multiple fieldbus modules (Modbus RTU, ASCII) and HMI terminals via isolated RS-485/RS-232 links. IC Role / Device Role / Timing Role: Dual UART bridges parallel bus to two independent serial protocols with synchronized baud generation and hardware flow control. Use Value: 64-byte FIFOs absorb burst traffic from motion controllers; 5V-tolerant I/Os interface directly with legacy 5 V isolation transceivers. |
Use Scenario: Enables simultaneous ECG waveform streaming (RS-232) and Bluetooth module configuration (UART debug port) in portable diagnostics equipment. IC Role / Device Role / Timing Role: Provides two isolated, interrupt-prioritized serial channels with independent baud rates and error reporting for concurrent data streams. Use Value: Auto XON/XOFF prevents buffer overflow during high-priority waveform capture; IrDA support enables secure wireless firmware updates. |
| POS Terminal Multi-Peripheral Hub | Test Equipment Communication Controller |
Use Scenario: Aggregates serial data from barcode scanner, receipt printer, and magnetic stripe reader into a single ARM-based payment terminal. IC Role / Device Role / Timing Role: Acts as a centralized serial I/O concentrator with DMA-capable RXRDY/TXRDY signaling to offload CPU bandwidth. Use Value: Concurrent write capability to both channel registers allows synchronized command dispatch; 2.97–5.5 V operation matches wide-input power rails. |
Use Scenario: Controls GPIB-to-serial translation, DMM readout, and calibration signal generation in automated test racks. IC Role / Device Role / Timing Role: Serves as deterministic timing-critical UART engine with loopback diagnostics, break detection, and precise 16× oversampling. Use Value: Internal diagnostic registers (LSR, MSR) enable real-time link health monitoring; industrial temp rating ensures reliability in rack-mounted enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-UART applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NS16C2552TVS/NOPB | 16-byte FIFO per channel; identical pinout and register map but lower buffer depth and no Tx FIFO trigger level control. | Suitable for lower-bandwidth legacy systems where CPU overhead is acceptable and burst traffic is infrequent. | Select NS16C2552TVS/NOPB only when 64-byte FIFO is unnecessary and cost sensitivity outweighs throughput headroom. |
| XR16L2752IL48-F | Pin-compatible; identical 64-byte FIFO and IrDA support, but uses different default reset states for EFR and lacks TI-specific AFR configuration flexibility. | Valid for drop-in replacement in most NS16C2752TVS/NOPB designs, though firmware may require minor EFR initialization adjustment. | Choose XR16L2752IL48-F when sourcing diversification is required and register initialization sequence can be verified against EXAR's errata. |
Compared with NS16C2552TVS/NOPB, the NS16C2752TVS/NOPB delivers 4× deeper FIFO buffering and advanced Tx trigger control-critical for deterministic real-time serial throughput-while XR16L2752IL48-F offers functional equivalence with minor initialization differences, making it a validated second-source option.
Availability
NS16C2752TVS/NOPB is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, point-of-sale terminals, and automated test equipment requiring stable component supply and long-term obsolescence management.
Supply support for NS16C2752TVS/NOPB 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
Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and industrial-grade qualification.
The NS16C2752TVS/NOPB belongs to TI's legacy communications interface portfolio, designed specifically for robust, pin-compatible upgrades of PC16552D-based systems in industrial and medical applications demanding extended temperature operation and enhanced FIFO performance.
FAQ
What is the FIFO depth of the NS16C2752TVS/NOPB, and how does it differ from the NS16C2552?
The NS16C2752TVS/NOPB provides 64-byte transmit and receive FIFOs per channel, quadrupling the buffer capacity of the NS16C2552TVS/NOPB (16-byte FIFOs). This larger depth significantly reduces CPU interrupt frequency during high-throughput serial transfers and improves data integrity under bursty traffic conditions. The NS16C2752TVS/NOPB also adds programmable Tx FIFO trigger levels-a feature absent in the NS16C2552TVS/NOPB-enabling fine-grained DMA control.
Is the NS16C2752TVS/NOPB pin-compatible with the PC16552D and other industry-standard DUARTs?
Yes, the NS16C2752TVS/NOPB is pin-to-pin compatible with TI's PC16552D and functionally compatible with EXAR ST16C2552, XR16C2552, XR16L2552, and Philips SC16C2552B. Its 48-TQFP footprint matches these legacy devices, and its default register configuration replicates PC16552D behavior on power-up-enabling seamless hardware replacement without PCB redesign.
Does the NS16C2752TVS/NOPB support IrDA communication, and what version is implemented?
Yes, the NS16C2752TVS/NOPB integrates full IrDA v1.0-compliant encoder/decoder functionality. When enabled via MCR[6], SOUT outputs modulated 3/16-carrier IR signals and SIN accepts demodulated input-eliminating the need for external IrDA PHY ICs. This supports standard 115.2 kbit/s infrared data exchange for remote configuration and diagnostics.
What voltage levels are supported on the I/O pins of the NS16C2752TVS/NOPB?
The NS16C2752TVS/NOPB features 5 V-tolerant I/Os across its entire 2.97 V to 5.50 V VCC operating range. This means all serial (SIN/SOUT), MODEM (RTS/CTS/DTR/DSR), and bus (D7–D0, A2–A0) pins safely accept 5 V logic signals-even when VCC is powered at 3.3 V-removing the need for external level shifters in mixed-voltage systems.
How does the NS16C2752TVS/NOPB handle interrupt prioritization and DMA signaling?
The NS16C2752TVS/NOPB implements per-channel interrupt prioritization via the IIR register, with seven distinct interrupt sources ranked by urgency (e.g., LSR errors > RXRDY > TXRDY > MSR). It provides dedicated TXRDY1/TXRDY2 and RXRDY1/RXRDY2 outputs for DMA handshaking, supporting both single-transfer (Mode 0) and multi-burst (Mode 1) DMA operations controlled by FCR[3].
NS16C2752TVS/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 48-TQFP
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Active
- Features:
- -
- Number of Channels:
- 2, DUART
- FIFO's:
- 64 Byte
- Protocol:
- -
- Data Rate (Max):
- 5Mbps
- Voltage - Supply:
- 2.97V ~ 5.5V
- With Auto Flow Control:
- Yes
- With IrDA Encoder/Decoder:
- Yes
- With False Start Bit Detection:
- -
- With Modem Control:
- Yes
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TQFP (7x7)
NS16C2752TVS/NOPB FAQ
1.How can I place an order for NS16C2752TVS/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for NS16C2752TVS/NOPB 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 NS16C2752TVS/NOPB reliable?
The price and inventory of NS16C2752TVS/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NS16C2752TVS/NOPB is usually 5 days.
3.What payment methods are accepted for NS16C2752TVS/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NS16C2752TVS/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NS16C2752TVS/NOPB?
NS16C2752TVS/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NS16C2752TVS/NOPB 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 NS16C2752TVS/NOPB?
For technical support, including NS16C2752TVS/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NS16C2752TVS/NOPB requirements.
6.How does Aetrix verify that NS16C2752TVS/NOPB is sourced from the original manufacturer or authorized distributors?
All NS16C2752TVS/NOPB 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 NS16C2752TVS/NOPB meets industry standards.
7.What is the process for return or replacement of NS16C2752TVS/NOPB?
All NS16C2752TVS/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with NS16C2752TVS/NOPB, 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 NS16C2752TVS/NOPB part is unused and in its original packaging.
Return procedure for NS16C2752TVS/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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