Texas Instruments TM4C1231D5PMT

Overview

TM4C1231D5PMT from Texas Instruments is an ARM Cortex-M4F-based microcontroller with 80 MHz operation, 256 KB flash, 32 KB SRAM, integrated USB 2.0 OTG, two CAN 2.0A/B controllers, and 12-bit ADC with 12 channels - deployed in industrial motor control, smart sensor nodes, and USB-connected embedded gateways.

For engineers reviewing the TM4C1231D5PMT datasheet, TM4C1231D5PMT pinout, TM4C1231D5PMT application, or TM4C1231D5PMT equivalent, key selection criteria include USB PHY integration, CAN bus timing tolerance, hibernation current (1.7 µA), FPU-enabled real-time math, and QFN-64 package thermal performance for convection-cooled designs.

Technical Context

The TM4C1231D5PMT implements a full-featured ARM Cortex-M4F core with hardware floating-point unit (FPU), supporting single-precision IEEE 754 operations and DSP instructions. It integrates dual CAN 2.0A/B controllers with programmable bit timing and message filtering, plus USB 2.0 OTG with on-chip PHY and 1 kB of dedicated RAM.

System-level integration includes μDMA with 32-channel support, hibernation module with RTC and battery-backed memory, and analog subsystem with temperature sensor, 12-bit ADC (1 MSPS), and four analog comparators - all managed via a unified clock gating and power control architecture compliant with ARM CoreSight debug standards.

Key Specifications

Pinout & Package

TM4C1231D5PMT uses a 64-pin QFN package with exposed thermal pad (package code: PMP). Pin functions are defined per TI SPMS334E datasheet Rev E, with dedicated JTAG/SWD debug pins, dual CAN transceiver I/Os, USB D+/D− differential pair, and GPIOs multiplexed across 16 peripheral modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with TM4C1231D5PMT, TM4C1294NCPDT trades CAN for Ethernet and scales flash/CPU but increases package complexity, while STM32F407VGT6 delivers higher clock speed and flash density at the cost of hibernation capability and dual-CAN integration - making TM4C1231D5PMT optimal for compact, dual-bus, battery-aware industrial nodes.

Availability

TM4C1231D5PMT is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, USB-connected gateways, and automotive diagnostic tools requiring stable component supply, long-term lifecycle support, and qualified production lots.

Supply support for TM4C1231D5PMT 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 company headquartered in Dallas, Texas, delivering analog, embedded processing, and wireless technologies since 1930.

The TM4C123x product line was designed specifically for cost-sensitive, real-time industrial and automotive applications requiring mixed-signal integration, low-power hibernation, and robust communication peripherals including USB and CAN.

FAQ

Does TM4C1231D5PMT include an integrated USB physical layer?

Yes, TM4C1231D5PMT integrates a full-speed USB 2.0 OTG physical layer (PHY) with dedicated 1 kB RAM, eliminating the need for an external USB transceiver. This enables direct connection to USB connectors in device, host, or OTG configurations - a key differentiator from many competing Cortex-M4 MCUs that require external PHY ICs.

What is the lowest power state supported by TM4C1231D5PMT with RTC functionality active?

The TM4C1231D5PMT supports hibernation mode with RTC active and 256 bytes of battery-backed RAM retained at 1.7 µA typical current. This mode uses the hibernation module's dedicated oscillator and power domain, allowing precise timekeeping and wake-up events without waking the main CPU or flash/SRAM domains.

How many CAN interfaces does TM4C1231D5PMT provide, and are they fully independent?

TM4C1231D5PMT provides two fully independent CAN 2.0A/B controllers, each with its own message RAM (32 message objects), bit timing registers, and interrupt vector. They operate concurrently without resource contention, enabling simultaneous communication on separate CAN networks - essential for redundancy or multi-domain vehicle systems.

Is the floating-point unit in TM4C1231D5PMT IEEE 754-compliant and enabled by default?

Yes, the TM4C1231D5PMT includes a hardware floating-point unit compliant with IEEE 754 single-precision standard. It is disabled at reset and must be explicitly enabled via the CPACR register; once enabled, it accelerates trigonometric, exponential, and division operations with deterministic latency - critical for real-time motor control algorithms running on TM4C1231D5PMT.

What package type and thermal characteristics define TM4C1231D5PMT's board-level integration?

TM4C1231D5PMT uses a 64-pin QFN package (9 mm × 9 mm, 0.5 mm pitch) with exposed thermal pad. Its θ_JA is 40.3°C/W (JEDEC standard board), enabling reliable operation up to 105°C ambient when properly heatsinked - making it suitable for enclosed industrial enclosures without forced airflow.