Skip to main content
Log in
Texas Instruments LM3S9790-IQC80-C5T — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S9790-IQC80-C5T Stellaris ARM Cortex-M3 MCU, 80MHz

MPNLM3S9790-IQC80-C5T
Obsolete

Stellaris® ARM® Cortex®-M3S 9000 series 32-Bit Single-Core MCU, LM3S9790-IQC80-C5T, 80MHz, 128KB Flash, 64K x 8 RAM, 60 I/O, Ethernet, CAN, USB OTG, 100-LQFP, -40°C~85°C.

$7.7100Ref. price · indicative, final on quote
Texas Instruments LM3S9790-IQC80-C5T datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S9790-IQC80-C5T specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 9000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.235V ~ 1.365V
Operating temperature-40°C~85°C(TA)
Speed80MHz
PackageTape & Reel (TR)
RAM size64K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
ConnectivityCANbus, EBI/EMI, Ethernet, I²C, IrDA, LINbus, Microwire, SPI, SSI, UART/USART, USB OTG
Number of i (O)60
Core processorARM® Cortex®-M3
Case100-LQFP
Data convertersA/D 16x10b
Program memory size128KB (128K x 8)

Product details

The LM3S9790-IQC80-C5T is officially obsolete per the manufacturer's product status. No last-time-buy window remains open. For any BOM line that still calls this order code, supply runs through the independent surplus and broker channel.

The 80 MHz core speed places this MCU in the mid-range Cortex-M3 performance band — fast enough to handle a real-time control loop with Ethernet stack and CAN messaging simultaneously, without needing an external protocol coprocessor. For designs that require deterministic response under interrupt load, the 80 MHz clock and the DMA controller (listed among peripherals) keep bus contention manageable.

Connectivity and I/O

Ethernet support is built in — no external PHY needed. The part also integrates CAN, USB OTG, and multiple serial interfaces (UART, I²C, SPI, SSI, Microwire, IrDA, LIN).

Supply voltage and power management

The core supply range is 1.235 V to 1.365 V.

Frequently asked questions

Is LM3S9790-IQC80-C5T obsolete or end of life?

Yes, it is obsolete. The manufacturer has discontinued this part with no last-time-buy window remaining. Sourcing is through independent surplus and broker channels; we can quote it to order against an RFQ.

What is the replacement for LM3S9790-IQC80-C5T?

No official replacement order code is listed in the lifecycle record. For a pin-compatible alternative within the Stellaris family, a cross-reference search against the base product number LM3S9790 may yield a functional equivalent. We can assist with a validated second-source search upon RFQ.

Does LM3S9790-IQC80-C5T support Ethernet?

Yes, the connectivity list includes Ethernet, along with CAN, USB OTG, I²C, SPI, UART, and others. The Ethernet MAC+PHY is integrated on-chip.

Where can I buy LM3S9790-IQC80-C5T?

This obsolete part is available through independent distribution. We source and quote it to order against an RFQ; availability and current pricing are confirmed at quote time.

What is the pinout of LM3S9790-IQC80-C5T?

The pinout is documented in the official datasheet for the LM3S9790 base product number. The part is in a 100-pin LQFP package (14x14 mm body, 0.5 mm pitch).

What is LM3S9790-IQC80-C5T's listed speed?

The core is rated at 80 MHz.