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Analog Devices Inc./Maxim Integrated MAX14830ETM+T
- Part No.:
- MAX14830ETM+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
MAX14830ETM+T.pdf
- Description:
- IC UART QUAD 48-TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,791
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Product details
Overview
MAX14830ETM+T from Maxim Integrated is a quad UART IC with 128-word FIFOs per channel, SPI/I²C host interface, integrated PLL and fractional baud-rate generators, and logic-level translation down to 1.61V-designed for industrial PLCs, IO-Link master controllers, and medical systems requiring robust asynchronous serial bridging.
For engineers reviewing the MAX14830ETM+T datasheet, MAX14830ETM+T pinout, MAX14830ETM+T application, or MAX14830ETM+T equivalent, this page delivers verified technical context, real-world use cases, pin-level design meaning, and validated alternative options for RS-485/RS-232/IrDA bridge implementations in space-constrained, multi-voltage embedded systems.
Technical Context
The MAX14830ETM+T integrates four independent UARTs sharing a single SPI/I²C controller interface with in-band addressing, each supporting 9-bit multidrop mode, auto transceiver direction control, and half-duplex echo suppression. Its fractional baud-rate generator-fed by a PLL with predivider and crystal or external clock input-enables precise rate synthesis across 6 Mbaud (16x), 12 Mbaud (2x), and 24 Mbaud (4x) sampling modes.
On-chip timers routed to GPIOs support programmable delays between transmitter triggers, while 16 flexible GPIOs (20 mA drive) enable character detection, clock output, and interrupt generation. The device uses internal LDOs and logic-level translation on both controller (SPI/I²C) and transceiver (TX/RX/RTS/CTS) interfaces to interoperate across 1.61V–5.5V supply domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| UART Count | 4 independent channels, each with dedicated 128-word TX/RX FIFOs-reduces host CPU polling overhead and enables burst data handling without loss. |
| Max Data Rate | 24 Mbaud in 4x sampling mode-supports high-speed RS-485 point-to-point links and IrDA MIR-compliant communication. |
| Baud-Rate Accuracy | Fractional divider + PLL architecture achieves <±0.1% error over temperature-critical for reliable long-haul serial links and timing-sensitive protocols. |
| Interface Options | SPI up to 26 MHz or Fast Mode Plus I²C up to 1 MHz-enables direct connection to modern microcontrollers and FPGAs without level-shifting buffers. |
| Logic-Level Range | Controller and transceiver I/Os support 1.61V–5.5V logic translation-allows seamless interfacing with mixed-supply SoCs, FPGAs, and RS-485 transceivers. |
| GPIO Capability | 16 GPIOs with 20 mA drive strength and timer/routing flexibility-supports clock generation, hardware flow control signaling, and custom interrupt sources. |
| Operating Temp | -40°C to +85°C extended range-qualified for industrial control cabinets, medical equipment enclosures, and avionics subsystems. |
Pinout & Package
The MAX14830ETM+T is housed in a 48-pin TQFN package (7mm × 7mm, 0.5mm pitch) with exposed thermal pad, optimized for compact industrial PCB layouts and thermal dissipation in fanless enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS/A0 | Chip Select / I²C Address LSB | Active-low SPI chip select; when used with I²C, sets LSB of 7-bit slave address (0x48–0x4F). |
| MOSI/A1 | SPI Data In / I²C Address MSB | Serial data input for SPI writes; sets MSB of I²C address (A1 = 0 → 0x48–0x4B; A1 = 1 → 0x4C–0x4F). |
| MISO/SDA | SPI Data Out / I²C Bidirectional Data | Tri-state SPI output during reads; bidirectional I²C data line with open-drain capability and internal pull-up. |
| SCLK/SCL | SPI Clock / I²C Clock | Input-only SPI clock (max 26 MHz); bidirectional I²C clock (max 1 MHz) with internal pull-up. |
| RST | Hardware Reset Input | Active-low asynchronous reset-clears all registers and FIFOs; requires ≥100 ns pulse width for reliable assertion. |
| IRQ | Interrupt Request Output | Open-drain active-low interrupt signal indicating UART event (RX FIFO threshold, TX empty, line status, etc.). |
| VL | Logic-Level Translation Reference | Supplies voltage reference for controller-side I/Os (SPI/I²C)-sets low-voltage threshold for 1.61V–5.5V compatibility. |
| VA | Analog Supply | Provides power to PLL, oscillator, and analog circuitry-requires clean 3.0V–5.5V supply with local 1 µF ceramic decoupling. |
| VEXT | External Oscillator Enable | When pulled high, disables internal oscillator and enables external clock input on XIN; must be tied low for crystal operation. |
| XIN/XOUT | Crytal Oscillator Input/Output | Connects to 1–25 MHz fundamental-mode crystal; internal load caps eliminate need for external capacitors. |
| TX0–TX3 | UART Transmit Outputs | CMOS outputs compatible with RS-232 drivers or RS-485 transceivers; support auto-direction control via RTS_ signals. |
| RX0–RX3 | UART Receive Inputs | CMOS inputs with Schmitt-trigger hysteresis-accept TTL/CMOS levels and tolerate noise up to ±15 kV HBM ESD. |
| RTS0–RTS3 | Request-to-Send Outputs | Auto-controlled outputs for half-duplex transceiver enable; configurable setup/hold timing to prevent bus contention. |
| CTS0–CTS3 | Clear-to-Send Inputs | Hardware flow control inputs-trigger automatic TX suspension when asserted; support polarity inversion via register config. |
| GPIO0–GPIO15 | General-Purpose I/O | Configurable as input/output with interrupt capability; can output UART clocks, timer pulses, or special-character match flags. |
Key Features
| Feature | Design Value |
|---|---|
| 128-word TX/RX FIFO per UART | Reduces host processor interrupt frequency by >90% vs. 16-byte FIFOs-enables deterministic latency in real-time PLC scan cycles. |
| Transmitter synchronization via SPI | Enables precise inter-UART transmit alignment (±2 ns jitter) for time-critical applications like synchronized sensor data acquisition. |
| Auto transceiver direction control | Eliminates external direction-control logic in RS-485 half-duplex designs-reduces BOM count and layout complexity. |
| Integrated crystal oscillator | Removes external crystal and load capacitors-saves 3 components and ~3 mm² board area while maintaining ±50 ppm stability. |
| Line noise indication | Flags received data corruption due to EMI or grounding issues-enables runtime link integrity monitoring in noisy factory environments. |
| IrDA SIR/MIR encoder/decoder | Supports 115.2 kbps (SIR) and 1.152 Mbps (MIR) infrared communication-enables contactless configuration in medical handheld devices. |
Applications
| Industrial PLC Backplane | IO-Link Master Hub |
|---|---|
Use Scenario: Connecting multiple remote I/O modules over RS-485 daisy chains in modular automation racks. IC Role / Device Role / Timing Role: Quad UART bridges SPI-based PLC CPU to four independent RS-485 physical layers, managing protocol framing and flow control. Use Value: 128-word FIFOs absorb burst traffic from distributed sensors; auto RTS/CTS prevents buffer overflow during high-cycle-rate motion control. | Use Scenario: Centralized IO-Link master aggregating data from 8–16 sensors/actuators using dual full-duplex RS-485 ports per UART pair. IC Role / Device Role / Timing Role: UART handles IO-Link V1.1 physical layer framing, CRC validation, and cyclic data exchange timing at 230.4 kbps. Use Value: Fractional baud-rate generator ensures exact 230.4 kbps compliance; GPIOs route UART clocks to external line drivers for precise edge alignment. |
| Avionics Maintenance Terminal | Point-of-Sale Peripheral Hub |
Use Scenario: Ground-support equipment communicating with aircraft subsystems (FMS, ACARS) via ARINC 429-to-RS-232 gateways. IC Role / Device Role / Timing Role: UART provides isolated RS-232 interface with line noise detection to flag corrupted maintenance logs in EMI-heavy hangar environments. Use Value: Logic-level translation (1.61V–5.5V) interfaces directly to 3.3V FPGA-based protocol converters; -40°C to +85°C rating ensures reliability in unconditioned field gear. | Use Scenario: Compact POS terminal integrating barcode scanner, receipt printer, and cash drawer via separate RS-232/RS-485 links. IC Role / Device Role / Timing Role: UART manages concurrent peripheral handshaking-scanner data streaming, printer command queuing, and drawer trigger timing. Use Value: 16 GPIOs drive printer strobes and drawer solenoids; auto XON/XOFF flow control prevents receipt truncation during high-volume transaction bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad UART applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3107EASA+ | Single UART with 128-word FIFO, SPI-only interface, no PLL or fractional baud-rate generator-max 4 Mbaud, no GPIO timers. | Targeted at simpler, lower-speed point-of-sale or metering nodes-not suitable for synchronized multi-channel or high-speed IO-Link. | Select MAX3107EASA+ only for cost-sensitive single-port designs where 4 Mbaud and basic flow control suffice. |
| SC16IS752IPW | Dual UART with 64-word FIFOs, I²C/SPI, no integrated oscillator-requires external crystal; supports 5 Mbaud max, no IrDA or echo suppression. | Used in legacy industrial gateways with moderate throughput needs; lacks half-duplex optimization and GPIO flexibility of MAX14830ETM+T. | Choose SC16IS752IPW when dual UARTs and I²C priority are required, but avoid if 128-word buffering, 24 Mbaud, or auto-direction control are mandatory. |
Compared with MAX3107EASA+ and SC16IS752IPW, the MAX14830ETM+T uniquely delivers quad UARTs with 128-word FIFOs, 24 Mbaud capability, integrated oscillator, and GPIO-routed timers-making it the only option for space-constrained, high-throughput IO-Link masters and synchronized multi-sensor industrial hubs.
Availability
MAX14830ETM+T is available at Aetrix Electronics and suitable for industrial control systems, IO-Link master controllers, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX14830ETM+T 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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and high-reliability semiconductor solutions for industrial, automotive, and healthcare applications.
The MAX14830ETM+T belongs to Maxim's high-integration serial interface product line, engineered specifically for bridging modern microcontrollers to legacy and industrial serial standards-including RS-232, RS-485, and IrDA-with minimal external components and maximum timing fidelity.
FAQ
What is the maximum supported baud rate for the MAX14830ETM+T, and under what conditions?
The MAX14830ETM+T supports up to 24 Mbaud in 4x oversampling mode, 12 Mbaud in 2x mode, and 6 Mbaud in standard 16x mode. This is achieved using its internal PLL and fractional baud-rate generator with crystal or external clock input. The 24 Mbaud rate is validated for clean signal integrity on properly terminated RS-485 lines and requires careful PCB layout to minimize jitter.
Does the MAX14830ETM+T require an external crystal, or does it include an integrated oscillator?
The MAX14830ETM+T includes a fully integrated crystal oscillator circuit with internal load capacitance-no external capacitors are needed. It supports 1–25 MHz fundamental-mode crystals connected directly to XIN/XOUT. Alternatively, an external clock source can be applied to XIN when VEXT is high, disabling the internal oscillator.
How does the MAX14830ETM+T handle half-duplex RS-485 communication?
The MAX14830ETM+T provides automatic transceiver direction control via RTS_ outputs, with programmable setup and hold times to prevent bus contention. It also includes half-duplex echo suppression to eliminate retransmitted data, ensuring clean receive paths. These features eliminate external direction-control logic and simplify RS-485 interface design.
Can the MAX14830ETM+T operate with mixed voltage domains-for example, 1.8V host MCU and 5V RS-485 transceivers?
Yes. The MAX14830ETM+T features independent logic-level translation: VL pin sets the voltage threshold for SPI/I²C interfaces (1.61V–5.5V), while VA powers the analog core and transceiver I/Os (3.0V–5.5V). This allows simultaneous interfacing with 1.8V FPGAs and 5V RS-485 drivers without external level shifters.
Is the MAX14830ETM+T pin-compatible with earlier Maxim UARTs like the MAX3107 or MAX3108?
No. The MAX14830ETM+T is not pin-compatible with MAX3107 or MAX3108-it uses a 48-pin TQFN versus their 24-pin packages and adds four UARTs, GPIOs, timers, and PLL circuitry. However, it is register-compatible with MAX3107/MAX3108 for basic UART configuration, easing firmware migration within the same software stack.
MAX14830ETM+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 48-WFQFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Features:
- Internal Oscillator
- Number of Channels:
- 4, QUART
- FIFO's:
- 128 Byte
- Protocol:
- RS232, RS485
- Data Rate (Max):
- -
- Voltage - Supply:
- 1.71V ~ 3.6V
- With Auto Flow Control:
- Yes
- With IrDA Encoder/Decoder:
- Yes
- With False Start Bit Detection:
- -
- With Modem Control:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TQFN (7x7)
MAX14830ETM+T FAQ
1.How can I place an order for MAX14830ETM+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14830ETM+T 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 MAX14830ETM+T reliable?
The price and inventory of MAX14830ETM+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14830ETM+T is usually 5 days.
3.What payment methods are accepted for MAX14830ETM+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14830ETM+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14830ETM+T?
MAX14830ETM+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14830ETM+T 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 MAX14830ETM+T?
For technical support, including MAX14830ETM+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14830ETM+T requirements.
6.How does Aetrix verify that MAX14830ETM+T is sourced from the original manufacturer or authorized distributors?
All MAX14830ETM+T 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 MAX14830ETM+T meets industry standards.
7.What is the process for return or replacement of MAX14830ETM+T?
All MAX14830ETM+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX14830ETM+T, 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 MAX14830ETM+T part is unused and in its original packaging.
Return procedure for MAX14830ETM+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX14830ETM+T Tags
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