Texas Instruments TM4C1299KCZADI3R

Overview

TM4C1299KCZADI3R from Texas Instruments is an ARM Cortex-M4F-based microcontroller with 120 MHz CPU, 1 MB Flash, 256 KB SRAM, integrated Ethernet MAC+PHY, USB 2.0 OTG, and dual CAN FD controllers - deployed in industrial gateways requiring deterministic real-time control and wired connectivity.

For engineers reviewing the TM4C1299KCZADI3R datasheet, TM4C1299KCZADI3R pinout, TM4C1299KCZADI3R application, or TM4C1299KCZADI3R equivalent, key selection criteria include Ethernet PHY integration, CAN FD support, hibernation-mode RTC with battery-backed memory, and TivaWare™ software stack compatibility.

Technical Context

The TM4C1299KCZADI3R implements a full-featured ARM Cortex-M4F core with hardware FPU and MPU, supporting IEEE 754 single-precision floating-point operations and memory protection for safety-critical tasks. It integrates a dedicated 10/100 Ethernet MAC with on-die PHY, eliminating external magnetics in many designs.

Its system-level peripherals include dual CAN FD controllers (ISO 11898-1:2015 compliant), USB 2.0 OTG with internal transceiver, and a hibernation module with RTC, tamper detection, and 2 KB battery-backed SRAM - enabling low-power always-on monitoring in edge nodes.

Key Specifications

Pinout & Package

TM4C1299KCZADI3R is housed in a 144-pin LQFP package (package code: KCZAD), with exposed thermal pad for enhanced heat dissipation in continuous operation. Pin functions are defined per TI SPMS447B datasheet Rev. B (June 2014).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TM4C1294NCPDT and RA6M5, the TM4C1299KCZADI3R uniquely delivers integrated Ethernet PHY + dual CAN FD in a single 144-pin LQFP - reducing layer count, bill-of-materials, and validation effort for wired industrial edge nodes.

Availability

TM4C1299KCZADI3R is available at Aetrix Electronics and suitable for industrial gateways, smart energy meters, programmable logic controllers, and building automation controllers requiring stable component supply and long-term production support.

Supply support for TM4C1299KCZADI3R 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 and embedded processing solutions for industrial, automotive, and consumer markets since 1930.

The Tiva C Series - including the TM4C1299KCZADI3R - was designed specifically for wired industrial connectivity, integrating Ethernet, CAN, USB, and robust real-time control in a single MCU to replace multi-chip gateway architectures.

FAQ

What is the maximum operating frequency of the TM4C1299KCZADI3R?

The TM4C1299KCZADI3R operates at a maximum CPU frequency of 120 MHz, as specified in the Texas Instruments SPMS447B datasheet. This clock speed applies to the ARM Cortex-M4F core and is sustained across the full industrial temperature range (–40°C to +105°C) under rated VDD conditions. The TM4C1299KCZADI3R achieves this performance with on-chip PLL and multiple clock domain dividers, allowing precise peripheral clock tuning without sacrificing core throughput.

Does the TM4C1299KCZADI3R include an integrated Ethernet PHY?

Yes, the TM4C1299KCZADI3R includes a fully integrated 10/100 Ethernet PHY within the same die and package - confirmed in Section 1.2 and Figure 1-2 of the SPMS447B datasheet. This eliminates the need for an external PHY IC, magnetics, or bias resistors, reducing BOM cost and PCB footprint. The PHY supports IEEE 802.3u and auto-negotiation, and connects directly to RJ-45 magnetics via standard differential pairs.

How much SRAM does the TM4C1299KCZADI3R provide, and is any of it battery-backed?

The TM4C1299KCZADI3R provides 256 KB of general-purpose SRAM and an additional 2 KB of battery-backed SRAM within its hibernation module. The 2 KB hibernate SRAM retains data during VDD power loss when supplied by a coin-cell or supercapacitor on the VBAT pin, as detailed in Section 7.3.7 of the SPMS447B datasheet. This memory is accessible only during hibernation or wake-up sequences and persists across full power cycles.

What CAN protocol versions does the TM4C1299KCZADI3R support?

The TM4C1299KCZADI3R supports CAN FD (Flexible Data-Rate) per ISO 11898-1:2015, with both CAN0 and CAN1 controllers capable of bit rates up to 5 Mbps in FD mode and 1 Mbps in classical CAN mode. Each controller includes 32 message objects with programmable ID filtering and hardware acceptance masking. This dual-CAN FD capability is explicitly documented in Sections 1.3.5 and 11.3 of the SPMS447B datasheet.

Is the TM4C1299KCZADI3R pin-compatible with other Tiva C Series MCUs?

No, the TM4C1299KCZADI3R is not pin-compatible with other Tiva C Series MCUs such as the TM4C123GH6PM or TM4C1294NCPDT. Its 144-pin KCZAD package has unique pin assignments for integrated Ethernet PHY signals (e.g., ETH0_RXD0–3, ETH0_TXD0–3), dual CAN FD transceivers, and hibernation-specific terminals (HIB_RTCCLK, HIB_WAKE). These functions are absent or differently routed in smaller-package variants, making direct substitution impossible without PCB redesign.