Texas Instruments TM4C1237H6PZI

Overview

TM4C1237H6PZI from Texas Instruments is an ARM Cortex-M4F-based microcontroller with 256 KB Flash, 32 KB SRAM, and integrated analog peripherals including 12-bit ADC (up to 1MSPS), PWM, UART, I²C, SPI, USB 2.0, and hibernation module; it operates at up to 80 MHz and supports industrial temperature range (–40°C to +105°C) in a 100-pin LQFP package for embedded control applications requiring real-time processing and low-power operation.

For engineers reviewing the TM4C1237H6PZI datasheet, TM4C1237H6PZI pinout, TM4C1237H6PZI application, or TM4C1237H6PZI equivalent, key selection considerations include its integrated USB PHY, hibernation mode with RTC and battery-backed memory, FPU-enabled floating-point performance, and support for TivaWare™ software ecosystem and TI's Code Composer Studio™ IDE.

Technical Context

The TM4C1237H6PZI integrates an ARM Cortex-M4F core with single-precision FPU, enabling deterministic floating-point math for motor control and sensor fusion. It features a 32-bit bus architecture, 80 MHz system clock, and on-chip PLL with internal oscillator bypass capability.

Its peripheral set includes four 16/32-bit general-purpose timers (GPTM), two watchdog timers, eight UARTs (one with full modem handshake), four I²C modules, four SPI modules, and a dedicated USB controller with integrated PHY supporting device/host/OTG modes - all accessible via configurable GPIO with slew-rate control and programmable pull-up/down.

Key Specifications

Pinout & Package

TM4C1237H6PZI is housed in a 100-pin LQFP (PZ) package with exposed thermal pad. Pin functions are fully defined in TI SPMS362E datasheet Section 1.4 and Table 1-1 (Pin Assignments). All pins support multiple peripheral mappings via GPIO AFSEL registers.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TM4C1294NCPDT and STM32F407VGT6, the TM4C1237H6PZI delivers optimized low-power operation through its hibernation module and integrated USB PHY, making it uniquely suitable for battery-constrained, USB-connected, and RTC-dependent embedded systems where peripheral integration reduces design complexity and bill-of-materials cost.

Availability

TM4C1237H6PZI is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, automotive body electronics, and IoT sensor hub designs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for TM4C1237H6PZI 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 TM4C1237H6PZI belongs to TI's Tiva C Series microcontroller family, designed specifically for cost-sensitive, real-time embedded applications demanding high integration, low-power operation, and broad software compatibility via TivaWare™ and CMSIS standards.

FAQ

What is the maximum operating frequency of the TM4C1237H6PZI?

The TM4C1237H6PZI operates at a maximum system clock frequency of 80 MHz, achieved via its on-chip PLL with support for external crystal or internal oscillator input. This frequency is fully supported across the entire industrial temperature range (–40°C to +105°C) and enables deterministic execution of real-time control tasks with predictable interrupt latency and timer resolution.

Does the TM4C1237H6PZI include an integrated USB physical layer (PHY)?

Yes, the TM4C1237H6PZI includes a full-speed USB 2.0 PHY integrated into the die, supporting device, host, and OTG modes without requiring external transceivers. It provides dedicated VBUS sensing, ID pin detection, and internal 3.3-V regulator for USB I/O - confirmed in Section 1.3.4 and Figure 1-2 of the SPMS362E datasheet.

What low-power modes does the TM4C1237H6PZI support, and what is its lowest current draw?

The TM4C1237H6PZI supports multiple low-power states including Sleep, Deep-Sleep, and Hibernate. In Hibernate mode with RTC active and 2 KB battery-backed RAM retained, it draws as little as 1.7 µA (typical) - verified in Section 7.3.7 of the SPMS362E datasheet. Wake-up sources include external pins, RTC match, and hibernate GPIO interrupts.

Is the TM4C1237H6PZI pin-compatible with other Tiva C Series microcontrollers?

No, the TM4C1237H6PZI is not pin-compatible with other Tiva C Series devices such as the TM4C1294 or TM4C123GH6PM. Its 100-pin LQFP (PZ) package has a unique pin assignment optimized for its peripheral set, including dedicated USB, hibernation, and analog signal routing - detailed in Table 1-1 of SPMS362E.

What development tools and software support are available for the TM4C1237H6PZI?

The TM4C1237H6PZI is fully supported by Texas Instruments' TivaWare™ Peripheral Driver Library, Code Composer Studio™ IDE, and Energia Arduino-compatible framework. TI also provides reference designs, evaluation kits (e.g., TM4C123GXL LaunchPad), and application notes covering USB device stacks, motor control, and low-power implementation - all accessible via ti.com/tm4c.