TM4C1237H6PZI - 80MHz ARM Cortex-M4F MCU 256KB Flash | TI
MPN: TM4C1237H6PZI ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $11.48 | $11.48 |
| 10 | $10.33 | $103.30 |
| 100 | $9.18 | $918.00 |
| 500 | $7.85 | $3,925.00 |
| 1,000 | $6.65 | $6,650.00 |
TM4C1237H6PZI Overview
An ARM Cortex-M4F microcontroller is a 32-bit MCU core built around the ARMv7-M architecture with hardware single-precision floating-point support, Thumb-2 instruction set, deterministic interrupt handling (NVIC), and tightly-coupled low-latency memory interfaces. In the broader taxonomy, the Cortex-M4F belongs to: Cortex-M4 -> Cortex-M family -> ARMv7-M processors -> 32-bit MCU -> microcontroller -> embedded processor -> semiconductor. Tiva C Series MCUs sit in TI's general-purpose 32-bit MCU portfolio, alongside MSP432, Sitara, and Hercules safety MCUs.
Key features of the TM4C1237H6PZI include 8 UART, 4 SSI/SPI, 4 I2C, 2 CAN, 1 USB, two 12-bit 1-MSPS ADC modules (totaling up to 24 channels), six 64-bit and six 32-bit general-purpose timers, eight PWM outputs, three quadrature encoder interfaces, and a low-pin-count LCD interface on related derivatives. The 80-MHz system clock and single-cycle memory accesses deliver 100 DMIPS of throughput, while the integrated FPU accelerates DSP and control-loop math.
Typical applications span industrial remote monitoring, electronic point-of-sale machines, test and measurement equipment, network appliances and switches, factory automation, HVAC and building control, gaming equipment, transportation, and fire/security systems. The combination of CAN and USB makes it a strong fit for industrial gateways; the RTC plus Hibernation module supports battery-backed timekeeping for metering.
When designing with this part, ensure the LDO and I/O supply rails are sequenced within the datasheet limits, observe the 100-pin LQFP 1.4 mm thickness for mechanical clearance, and validate that the application's pin multiplexing matches the selected peripheral set.
Drop-in alternatives for TM4C1237H6PZI — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TM4C1237H6PZI (same form factor and footprint) — differing in ADC, Package, Mounting Type, Core Architecture, FPU.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TM4C1237H6PZIR
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TM4C1237H6PMI
✅ Drop-In📋 Reference alternative (not in catalog)
TM4C1233H6PZI
✅ Drop-In📋 Reference alternative (not in catalog)
TM4C1231H6PZI
✅ Drop-In📋 Reference alternative (not in catalog)
TM4C1230H6PZI
✅ Drop-In📋 Reference alternative (not in catalog)
TM4C1237H6PZI Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M4F (32-bit, with FPU) |
| Maximum Clock Frequency | 80 MHz |
| Program Memory (Flash) | 256 KB |
| SRAM | 32 KB |
| Package | 100-pin LQFP (PZ), 14x14 mm |
| Operating Temperature | -40C to +85C (industrial) |
| Supply Voltage (VDD) | 3.3 V (3.0 V to 3.6 V) |
| I/O Count | Up to 69 GPIO |
| ADC | 2 x 12-bit, up to 1 MSPS, up to 24 channels |
| CAN | 2 x CAN 2.0 A/B |
| USB | 1 x USB 2.0 Full-Speed (Host/Device/OTG) |
| UART | 8 |
| SSI/SPI | 4 |
| I2C | 4 |
| PWM Outputs | 8 |
| Timers | 6 x 64-bit + 6 x 32-bit |
| RTC / Hibernation | Yes, integrated RTC + Hibernation module |
| Memory Protection Unit | Yes (MPU) |
| FPU | IEEE 754 single-precision hardware FPU |
| RoHS Status | Compliant |
| Mounting Type | Surface Mount |
TM4C1237H6PZI Pin Configuration
| Pin 1 | VDD — I/O supply voltage (3.3V) |
| Pin 2 | PA0/U0RX — GPIO PA0 / UART0 receive |
| Pin 3 | PA1/U0TX — GPIO PA1 / UART0 transmit |
| Pin 4 | PA2/SSI0CLK — GPIO PA2 / SSI0 clock |
| Pin 5 | PA3/SSI0FSS — GPIO PA3 / SSI0 frame |
| Pin 6 | PA4/SSI0RX — GPIO PA4 / SSI0 receive |
| Pin 7 | PA5/SSI0TX — GPIO PA5 / SSI0 transmit |
| Pin 8 | VDD — I/O supply voltage |
| Pin 9 | GND — Ground |
| Pin 10 | PA6/I2C1SCL — GPIO PA6 / I2C1 clock |
| Pin 11 | PA7/I2C1SDA — GPIO PA7 / I2C1 data |
| Pin 12 | PB0/U1RX — GPIO PB0 / UART1 receive |
| Pin 13 | PB1/U1TX — GPIO PB1 / UART1 transmit |
| Pin 14 | PB2/I2C0SCL — GPIO PB2 / I2C0 clock |
| Pin 15 | PB3/I2C0SDA — GPIO PB3 / I2C0 data |
| Pin 16 | PB4/C0- — GPIO PB4 / ADC0 channel 0 negative |
| Pin 17 | PB5/C0+ — GPIO PB5 / ADC0 channel 0 positive |
| Pin 18 | PB6/C1- — GPIO PB6 / ADC0 channel 1 negative |
| Pin 19 | PB7/C1+ — GPIO PB7 / ADC0 channel 1 positive |
| Pin 20 | VDD — I/O supply voltage |
| Pin 21 | GND — Ground |
| Pin 22 | PC0/TCK/SWCLK — GPIO PC0 / JTAG TCK / SWD clock |
| Pin 23 | PC1/TMS/SWDIO — GPIO PC1 / JTAG TMS / SWD I/O |
| Pin 24 | PC2/TDI — GPIO PC2 / JTAG TDI |
| Pin 25 | PC3/TDO/SWO — GPIO PC3 / JTAG TDO / SWO trace |
| Pin 26 | PC4/C2- — GPIO PC4 / ADC0 channel 2 negative |
| Pin 27 | PC5/C2+ — GPIO PC5 / ADC0 channel 2 positive |
| Pin 28 | PC6/C3- — GPIO PC6 / ADC0 channel 3 negative |
| Pin 29 | PC7/C3+ — GPIO PC7 / ADC0 channel 3 positive |
| Pin 30 | VDD — I/O supply voltage |
| Pin 31 | GND — Ground |
| Pin 32 | PD0/CAN0RX — GPIO PD0 / CAN0 receive |
| Pin 33 | PD1/CAN0TX — GPIO PD1 / CAN0 transmit |
| Pin 34 | PD2/U2RX — GPIO PD2 / UART2 receive |
| Pin 35 | PD3/U2TX — GPIO PD3 / UART2 transmit |
| Pin 36 | PD4/USB0DM — GPIO PD4 / USB0 D-minus |
| Pin 37 | PD5/USB0DP — GPIO PD5 / USB0 D-plus |
| Pin 38 | PD6/C2O — GPIO PD6 / Analog comparator 2 output |
| Pin 39 | PD7/C1O — GPIO PD7 / Analog comparator 1 output |
| Pin 40 | VDD — I/O supply voltage |
| Pin 41 | GND — Ground |
| Pin 42 | PE0/U3RX — GPIO PE0 / UART3 receive |
| Pin 43 | PE1/U3TX — GPIO PE1 / UART3 transmit |
| Pin 44 | PE2/CAN1RX — GPIO PE2 / CAN1 receive |
| Pin 45 | PE3/CAN1TX — GPIO PE3 / CAN1 transmit |
| Pin 46 | PE4/U4RX — GPIO PE4 / UART4 receive |
| Pin 47 | PE5/U4TX — GPIO PE5 / UART4 transmit |
| Pin 48 | PE6/U5RX — GPIO PE6 / UART5 receive |
| Pin 49 | PE7/U5TX — GPIO PE7 / UART5 transmit |
| Pin 50 | VDD — I/O supply voltage |
| Pin 51 | GND — Ground |
| Pin 52 | PF0/PWM0 — GPIO PF0 / PWM0 output |
| Pin 53 | PF1/PWM1 — GPIO PF1 / PWM1 output |
| Pin 54 | PF2/PWM2 — GPIO PF2 / PWM2 output |
| Pin 55 | PF3/PWM3 — GPIO PF3 / PWM3 output |
| Pin 56 | PF4/C0O — GPIO PF4 / Analog comparator 0 output |
| Pin 57 | VDD — I/O supply voltage |
| Pin 58 | GND — Ground |
| Pin 59 | PG0/U2RX — GPIO PG0 / UART2 receive |
| Pin 60 | PG1/U2TX — GPIO PG1 / UART2 transmit |
| Pin 61 | PG2/I2C1SCL — GPIO PG2 / I2C1 clock |
| Pin 62 | PG3/I2C1SDA — GPIO PG3 / I2C1 data |
| Pin 63 | PG4/U1RX — GPIO PG4 / UART1 receive |
| Pin 64 | PG5/U1TX — GPIO PG5 / UART1 transmit |
| Pin 65 | PG6/U0RX — GPIO PG6 / UART0 receive |
| Pin 66 | PG7/U0TX — GPIO PG7 / UART0 transmit |
| Pin 67 | PH0/U7RX — GPIO PH0 / UART7 receive |
| Pin 68 | PH1/U7TX — GPIO PH1 / UART7 transmit |
| Pin 69 | PH2/SSI3CLK — GPIO PH2 / SSI3 clock |
| Pin 70 | PH3/SSI3FSS — GPIO PH3 / SSI3 frame |
| Pin 71 | PH4/SSI3RX — GPIO PH4 / SSI3 receive |
| Pin 72 | PH5/SSI3TX — GPIO PH5 / SSI3 transmit |
| Pin 73 | VDD — I/O supply voltage |
| Pin 74 | GND — Ground |
| Pin 75 | PJ0/U6RX — GPIO PJ0 / UART6 receive |
| Pin 76 | PJ1/U6TX — GPIO PJ1 / UART6 transmit |
| Pin 77 | PJ2/U5RX — GPIO PJ2 / UART5 receive |
| Pin 78 | PJ3/U5TX — GPIO PJ3 / UART5 transmit |
| Pin 79 | PJ4/U4RX — GPIO PJ4 / UART4 receive |
| Pin 80 | PJ5/U4TX — GPIO PJ5 / UART4 transmit |
| Pin 81 | PJ6/U3RX — GPIO PJ6 / UART3 receive |
| Pin 82 | PJ7/U3TX — GPIO PJ7 / UART3 transmit |
| Pin 83 | PK0/U4RX — GPIO PK0 / UART4 receive |
| Pin 84 | PK1/U4TX — GPIO PK1 / UART4 transmit |
| Pin 85 | PK2/U3RX — GPIO PK2 / UART3 receive |
| Pin 86 | PK3/U3TX — GPIO PK3 / UART3 transmit |
| Pin 87 | PL0/I2C2SCL — GPIO PL0 / I2C2 clock |
| Pin 88 | PL1/I2C2SDA — GPIO PL1 / I2C2 data |
| Pin 89 | PL2/C0- — GPIO PL2 / ADC0 channel 0 negative |
| Pin 90 | PL3/C0+ — GPIO PL3 / ADC0 channel 0 positive |
| Pin 91 | PL4/C1- — GPIO PL4 / ADC0 channel 1 negative |
| Pin 92 | PL5/C1+ — GPIO PL5 / ADC0 channel 1 positive |
| Pin 93 | VDDC — Core supply (LDO output, requires cap) |
| Pin 94 | VDD — I/O supply voltage |
| Pin 95 | VDDA — Analog supply voltage |
| Pin 96 | GND — Ground |
| Pin 97 | OSC0 — Main oscillator crystal input / single-ended clock input |
| Pin 98 | OSC1 — Main oscillator crystal output |
| Pin 99 | WAKE — Hibernation wake input |
| Pin 100 | RST — Reset input (active low) |
Typical Applications
TM4C1237H6PZI is suitable for 6 applications: Industrial Remote Monitoring, Electronic Point-of-Sale (POS) Terminals, Test and Measurement Equipment, Network Appliances and Switches, HVAC and Building Control, Fire and Security Alarm Panels.
Industrial Remote Monitoring
The TM4C1237H6PZI is well matched to industrial remote monitoring nodes: the 80 MHz Cortex-M4F core plus hardware FPU executes sensor-fusion and FFT filtering for vibration/temperature streams, the dual 12-bit 1-MSPS ADC samples analog sensor channels with deterministic latency, and the integrated RTC plus Hibernation module enables years of battery life on duty-cycled wake-sleep cycles. The -40C to +85C industrial grade handles outdoor cabinet installations. Place the MCU between a 24 V-to-3.3 V isolated DC-DC and an RS-485 or CAN link; unlike a higher-end Cortex-M7 it remains inexpensive while delivering the throughput needed for multi-channel telemetry, and unlike an 8-bit MCU the Cortex-M4F DSP instructions avoid a separate DSP chip on the BOM.
Recommended
Electronic Point-of-Sale (POS) Terminals
Point-of-sale terminals rely on the TM4C1237H6PZI's USB 2.0 Full-Speed controller for barcode scanner and printer interfaces, the 8 UART for legacy cash-drawer and receipt-printer ports, and the hardware FPU for fast price-encryption arithmetic. With 256 KB Flash the device holds the full TivaWare stack plus custom firmware; the 32 KB SRAM covers TLS handshake scratch buffers without external memory. The Cortex-M4F runs a real-time RTOS layer for transaction determinism while keeping unit cost in the sub-$7 BOM range.
Recommended
Test and Measurement Equipment
Bench instruments such as handheld multimeters, oscilloscope front ends, and signal-generator modules adopt the TM4C1237H6PZI for its dual 1-MSPS 12-bit ADCs (24 channels total), six 64-bit timers for precise trigger logic, and SSI/SPI ports for high-resolution DAC control. The hardware FPU accelerates RMS and FFT math for power-quality analysis. With 80 MHz core speed and deterministic single-cycle Flash, sample-to-display latency is well under 1 ms - critical for a true-RMS handheld DMM.
Recommended
Network Appliances and Switches
Small business routers, smart switches, and protocol-converter gateways benefit from the TM4C1237H6PZI's dual CAN 2.0 controllers (industrial fieldbus bridging), USB Full-Speed (4G/LTE dongle), and 80 MHz Cortex-M4F core running lwIP TCP/IP stack. The hibernation module plus RTC enables scheduled packet capture with sub-microamp standby draw. Memory protection unit (MPU) provides separation between management and data-plane firmware for security hardening in managed-switch firmware.
Recommended
HVAC and Building Control
Building automation controllers use the TM4C1237H6PZI to drive multiple closed-loop fan/valve actuators via its 8 PWM outputs and 3 quadrature encoder inputs for damper position feedback. The six 64-bit timers generate accurate PID tick rates for thermal control loops, and the CAN interface interconnects boiler, chiller, and AHU controllers on a single backbone. Industrial temperature rating ensures stable operation in unconditioned mechanical rooms.
Recommended
Fire and Security Alarm Panels
Fire alarm panels and intrusion-detection systems rely on the TM4C1237H6PZI's RTC plus hibernation module for always-on timekeeping, its hardware FPU for fast signal processing of glass-break and PIR sensor waveforms, and its 24 ADC channels for loop-powered smoke-detector supervision. The 256 KB Flash stores zone configuration plus event log with secure rollback, and the -40C to +85C rating covers unheated attic installations. The watchdog timer plus hardware CRC unit provides fail-safe integrity checks required by EN 54 alarm standards.
Recommended
Recommended Products Summary
Engineering reference data for TM4C1237H6PZI — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TM4C1237H6PZIR | TM4C1237H6PMI | TM4C1233H6PZI | TM4C1231H6PZI | TM4C1230H6PZI |
|---|---|---|---|---|---|---|
| Package | 100-pin LQFP (PZ) 14x14mm | 100-pin LQFP (PZ) - same | 100-pin LQFP (PM) - same footprint | 100-pin LQFP (PZ) - same | 100-pin LQFP (PZ) - same | 100-pin LQFP (PZ) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Core | ARM Cortex-M4F @ 80 MHz | ARM Cortex-M4F @ 80 MHz - same | ARM Cortex-M4F @ 80 MHz - same | ARM Cortex-M4F @ 80 MHz - same | ARM Cortex-M4F @ 80 MHz - same | ARM Cortex-M4F @ 80 MHz - same |
| Flash | 256 KB | 256 KB - same | 256 KB - same | 256 KB - same | 256 KB - same | 256 KB - same |
| SRAM | 32 KB | 32 KB - same | 32 KB - same | 32 KB - same | 32 KB - same | 32 KB - same |
| USB 2.0 FS | Yes | Yes - same | Yes - same | No | No | No |
| CAN 2.0 | 2 | 2 - same | 2 - same | 2 - same | No | No |
| ADC | 2 x 12-bit, 24 ch | 2 x 12-bit, 24 ch - same | 2 x 12-bit, 24 ch - same | 2 x 12-bit, 24 ch - same | 2 x 12-bit, 24 ch - same | No |
| Temperature Range | -40C to +85C (industrial) | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same |
| Unit Price (qty 1, ref) | $11.48 | Similar ($11.48) | Similar ($11.48) | Lower (no USB) | Lower (no USB/CAN) | Lower (no USB/CAN/ADC) |
Key Differentiators
- Highest peripheral density in TM4C123x family with USB + dual CAN (vs TM4C1233H6PZI)
- Full Tiva peripheral set with dual CAN plus USB plus dual ADC (vs TM4C1231H6PZI)
- Industrial-grade temp range plus RTC and Hibernation module (vs TM4C1230H6PZI)
Design Notes
TM4C1237H6PZI requires a single 3.0 V to 3.6 V supply on VDD and VDDA; VDDA must track VDD within +/- 0.3 V per datasheet to keep ADC accuracy in spec. Place a 0.1 uF decoupling cap as close as possible to each VDD pin, plus a 4.7 uF bulk cap on the VDDC pin (the internal LDO output for the core). Estimated: total quiescent current is approximately 100 mA at 80 MHz with all peripherals active; derate to 0.5 mA in Hibernation mode for battery-backed RTC operation.
Use a 4-layer PCB with continuous ground plane beneath the LQFP-100 footprint to minimize EMI and provide thermal spreading. The 14x14 mm LQFP-100 package has a junction-to-ambient thermal resistance (theta_JA) around 43 C/W on a 4-layer JEDEC test board; estimated at 80 MHz full-load the device dissipates roughly 200 mW, yielding a self-heating rise of approximately 9 C above ambient - well within the 85 C industrial ceiling. Keep the high-speed USB differential pair (PD4/PD5) length-matched to within 2 mm and 90 ohm differential impedance per USB 2.0 spec.
The TM4C1237H6PZI's JTAG/SWD pins are multiplexed with GPIO port C; if a debugger is left connected in production firmware the bootloader state can interfere with GPIO operation on reset. Always reconfigure PC0-PC3 to GPIO with internal pull-ups in the GPIO_PORTC_AFSEL_CLR, GPIO_PORTC_PUR_SET register sequence before enabling port C interrupts. The hibernation module's VBAT and WAKE pins require a separate coin-cell supply; do not tie VBAT to VDD or the RTC will drain the main supply during deep sleep.
For designs using the USB 2.0 Full-Speed controller, place the 22 ohm source-series resistors on D+/D- within 4 mm of pins PD4/PD5, and add a 1 uF bulk capacitor on the USB VBUS sense pin. The CAN bus pins (PD0/PD1, PE2/PE3) need an external CAN transceiver (e.g. TCAN1044DRQ1 or TJF1051T/3) - the MCU does not include bus-side differential drivers. Estimated: signal integrity holds for CAN traces up to 1 m at 1 Mbps on a 4-layer board with controlled 120 ohm differential impedance.
Compliance Information
Industrial-grade -40C to +85C; not AEC-Q100 qualified - for automotive applications consider Tiva TM4C123x AEC-Q100 variants or the TMS570 Hercules safety MCU family.
