Texas Instruments TM4C123BH6ZRBI7R

Overview

TM4C123BH6ZRBI7R from Texas Instruments is an ARM Cortex-M4F-based microcontroller with 256 KB flash, 32 KB SRAM, and integrated peripherals including USB 2.0 OTG, 8× PWM generators, 12-bit ADC (1MSPS), and dual CAN 2.0A/B controllers - deployed in industrial motor control, smart sensor nodes, and USB-connected embedded gateways.

For engineers reviewing the TM4C123BH6ZRBI7R datasheet, TM4C123BH6ZRBI7R pinout, TM4C123BH6ZRBI7R application, or TM4C123BH6ZRBI7R equivalent, key selection criteria include its 80 MHz operation, hibernation module with RTC and battery-backed memory, JTAG/SWD debug interface, and QFN-64 package with 51 GPIOs supporting peripheral multiplexing and hardware-driven event routing.

Technical Context

The TM4C123BH6ZRBI7R integrates a single-core ARM Cortex-M4F CPU with hardware floating-point unit (FPU), memory protection unit (MPU), and nested vectored interrupt controller (NVIC) - enabling deterministic real-time execution for motion control and closed-loop feedback systems. It supports Thumb-2 instruction set, bit-band addressing, and low-latency exception handling with up to 224 interrupt vectors.

System-level integration includes a micro-DMA controller (32-channel), hibernation module with VBAT support and wake-on-RTC/external-pin, and clock management with PLL, internal oscillators (PIOSC, LFIOSC), and external crystal input (1–25 MHz). All peripherals are register-mapped into the AHB/APB bus matrix with configurable power gating.

Key Specifications

Pinout & Package

TM4C123BH6ZRBI7R uses a 64-pin QFN package (9 mm × 9 mm, 0.4 mm pitch) with exposed thermal pad. Pin functions are defined per TI SPMS370E datasheet Rev E (June 2014), with dedicated power, ground, clock, reset, debug, and multiplexed peripheral pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TM4C123GH6ZRBI7, the TM4C123BH6ZRBI7R trades extended temperature range for lower cost; compared with STM32F407VGT6, it delivers tighter system integration with on-die USB/CAN PHYs and smaller footprint - reducing bill-of-materials and PCB layer count.

Availability

TM4C123BH6ZRBI7R is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, and USB human interface devices requiring stable component supply across long-lifecycle embedded programs.

Supply support for TM4C123BH6ZRBI7R 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 for industrial, automotive, and consumer markets.

The Tiva C Series - including TM4C123BH6ZRBI7R - was designed for cost-sensitive, real-time embedded applications requiring high peripheral integration, low-power operation, and ARM Cortex-M4F performance with FPU acceleration.

FAQ

What is the maximum operating frequency of the TM4C123BH6ZRBI7R?

The TM4C123BH6ZRBI7R operates at a maximum system clock frequency of 80 MHz, achieved via its internal PLL driven by an external crystal (up to 25 MHz) or internal oscillator. This frequency is fully supported across all operating conditions specified in the datasheet, and all peripherals - including USB, CAN, and ADC - are rated for concurrent operation at this speed without timing violation.

Does the TM4C123BH6ZRBI7R include an integrated USB physical layer (PHY)?

Yes, the TM4C123BH6ZRBI7R integrates a full-speed USB 2.0 OTG physical layer (PHY) compliant with USB specification revision 2.0. This eliminates the need for an external USB transceiver, allowing direct connection of D+ and D− lines to a USB connector. The on-chip PHY supports both host and device modes and is accessible through the USB0 peripheral module in the TM4C123BH6ZRBI7R.

How many analog-to-digital converter (ADC) channels does the TM4C123BH6ZRBI7R support?

The TM4C123BH6ZRBI7R features a single 12-bit successive approximation register (SAR) ADC with up to 12 external input channels and one internal temperature sensor channel. It supports four independent sample sequencers, hardware averaging (up to 64 samples), and programmable trigger sources - enabling simultaneous sampling of multiple sensors with minimal CPU intervention.

What debug interfaces are supported by the TM4C123BH6ZRBI7R?

The TM4C123BH6ZRBI7R supports both JTAG and ARM Serial Wire Debug (SWD) interfaces via dedicated pins (TCK, TMS, TDI, TDO, nSRST, SWDIO, SWCLK). These interfaces provide full visibility into CPU state, memory, and peripherals during development and production testing, and are compatible with standard tools including TI's Code Composer Studio and third-party debug probes such as Segger J-Link.

Is the TM4C123BH6ZRBI7R pin-compatible with other Tiva C Series microcontrollers?

The TM4C123BH6ZRBI7R shares the same 64-pin QFN package and pinout with other TM4C123x variants in the ZRB suffix family (e.g., TM4C123GH6ZRBI7, TM4C123GH6ZRB), enabling drop-in replacement within the same temperature grade. However, it is not pin-compatible with TM4C129x or TM4C1230H6PM devices due to differing peripheral mappings and package sizes.