My Inquiry
My Account
Texas Instruments LM3S1958-EQC50-A2
- Part No.:
- LM3S1958-EQC50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S1958-EQC50-A2.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,962
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM3S1958-EQC50-A2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated hibernation module, 12-bit ADC (up to 1 MSPS), and dual UARTs + I²C + SSI interfaces. It operates at 50 MHz and supports industrial motor control, sensor monitoring, and embedded HMI applications.
For engineers reviewing the LM3S1958-EQC50-A2 datasheet, LM3S1958-EQC50-A2 pinout, LM3S1958-EQC50-A2 application, or LM3S1958-EQC50-A2 equivalent, key selection criteria include hibernation-enabled low-power operation, on-chip RTC with battery-backed memory, and full peripheral set for real-time control without external timing or interface ICs.
Technical Context
The LM3S1958-EQC50-A2 implements the ARM Cortex-M3 core with NVIC, SysTick, and MPU, enabling deterministic interrupt handling and memory protection in safety-critical firmware. Its hibernation module integrates RTC, battery-backed RAM, and wake-up sources-supporting sub-µA sleep current with retained state.
Peripherals include a 12-bit, 8-channel ADC with hardware averaging and sequencer-based sampling, two UARTs with IrDA/SIR support, one I²C master/slave, one SSI controller, and eight PWM-capable general-purpose timers. All are clocked from a configurable PLL-driven system clock up to 50 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, Thumb-2 instruction set, 50 MHz max operation |
| Memory | 256 KB on-chip flash (programmable in-system), 64 KB SRAM |
| ADC | 12-bit resolution, 8-channel input, 1 MSPS sample rate, hardware averaging up to 64x |
| Hibernation Module | RTC with calendar, 2 KB battery-backed RAM, wake-on-RTC-match or external pin |
| Timers | 8 × 16/32-bit GPTMs; 2 × 32-bit timers support RTC mode; watchdog timer included |
| Communication | 2 × UART (IrDA/SIR), 1 × I²C (master/slave), 1 × SSI (SPI-compatible), JTAG debug interface |
| Package | 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, lead-free |
Pinout & Package
LM3S1958-EQC50-A2 is housed in a 100-pin LQFP package (Pb-free, RoHS-compliant) with 0.5 mm pitch and exposed thermal pad. Pinout supports full peripheral multiplexing across GPIO banks A–F, including dedicated analog inputs, UART TX/RX, I²C SCL/SDA, SSI CLK/FS/MO/MI, and hibernation control signals (HIB, RTCCLK, RTCEN).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | VDD (digital core), VDDA (analog), VDDC (hibernation domain); require separate decoupling |
| HIB, RTCCLK, RTCEN | Hibernation control | HIB enables hibernate mode; RTCCLK provides external clock source; RTCEN enables RTC oscillator |
| PA0–PA7, PB0–PB7, etc. | GPIO bank terminals | Configurable as digital I/O, analog input, or peripheral function (e.g., UART0RX on PA0) |
| U0RX, U0TX, U1RX, U1TX | UART data I/O | Dual asynchronous serial interfaces; U0 supports IrDA modulation; U1 supports SIR encoding |
| SSI0CLK, SSI0FSS, SSI0RX, SSI0TX | SSI interface signals | Full-duplex synchronous serial (SPI-compatible) with programmable bit rate and frame format |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation with RTC & battery-backed RAM | Enables ultra-low-power operation (<1 µA) while retaining timekeeping and 2 KB of critical state |
| Integrated 12-bit ADC with hardware averaging | Reduces firmware overhead for noise-sensitive sensor acquisition; supports burst sampling without CPU intervention |
| Dual UARTs with IrDA/SIR support | Allows direct infrared communication and legacy serial protocols without external transceivers |
| Peripheral multiplexing on all GPIO banks | Maximizes board-level flexibility: each pin supports ≥3 alternate functions (e.g., PWM, ADC, UART) |
| ARM Cortex-M3 with NVIC and MPU | Delivers deterministic real-time response (≤12 cycle interrupt latency) and memory isolation for robust firmware partitioning |
Applications
| Industrial Motor Control | Sensor Data Acquisition |
|---|---|
Use Scenario: Closed-loop BLDC motor drive with position feedback, current sensing, and thermal monitoring. IC Role / Device Role / Timing Role: Real-time controller executing FOC algorithms, managing PWM generation, ADC sampling, and fault shutdown logic. Use Value: On-chip hibernation allows safe power-down during idle periods; 12-bit ADC with hardware averaging ensures accurate current measurement under EMI. | Use Scenario: Remote environmental sensor node logging temperature, humidity, and pressure over extended intervals. IC Role / Device Role / Timing Role: System-on-chip host managing sensor interfaces, data preprocessing, and low-power wireless transmission scheduling. Use Value: Integrated RTC and battery-backed RAM enable time-stamped logging during main power loss; sub-µA hibernate extends battery life to years. |
| Embedded Human-Machine Interface | Programmable Logic Controller (PLC) I/O Module |
Use Scenario: Touch-button panel with LED indicators, buzzer feedback, and serial command interface to host MCU. IC Role / Device Role / Timing Role: Dedicated UI controller handling button debouncing, LED PWM dimming, and UART command parsing. Use Value: Eight GPTMs provide independent PWM channels for LED brightness control; dual UARTs allow simultaneous host comms and diagnostics port. | Use Scenario: DIN-rail mounted I/O expansion module with digital input filtering, relay driving, and Modbus RTU over RS-485. IC Role / Device Role / Timing Role: Protocol-aware peripheral manager handling Modbus framing, CRC calculation, and isolated I/O timing. Use Value: Hardware UART FIFOs prevent overrun during high-speed Modbus bursts; GPIO commit registers ensure glitch-free output updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S8962-IQC50-A2 | Same Cortex-M3 core, 256 KB flash, 64 KB SRAM, but lacks hibernation module and battery-backed RAM | Not suitable for battery-powered or ultra-low-power wake-on-event designs | Select when hibernation is unnecessary and cost optimization is prioritized |
| TM4C123GH6PM | Successor family with enhanced peripherals (USB, CAN), 80 MHz operation, and updated Cortex-M4F core with FPU | Requires PCB redesign due to 64-pin TQFP vs. 100-pin LQFP; supports floating-point math and USB device stack | Select for new designs needing higher performance, USB connectivity, or future-proofing beyond LM3S lifecycle |
Compared with LM3S8962-IQC50-A2, LM3S1958-EQC50-A2 adds hibernation capability essential for energy-constrained systems; compared with TM4C123GH6PM, it offers drop-in compatibility only in software-not hardware-and trades USB/CAN for lower BOM cost and proven industrial reliability in legacy deployments.
Availability
LM3S1958-EQC50-A2 is available at Aetrix Electronics and suitable for industrial motor control, sensor data acquisition, embedded HMI, and PLC I/O modules requiring stable component supply across long-lifecycle production programs.
Supply support for LM3S1958-EQC50-A2 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 leader delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The Stellaris LM3S series was designed as the first ARM Cortex-M3-based microcontroller family for cost-sensitive, real-time embedded applications demanding integrated analog, communication, and low-power features without external support ICs.
FAQ
What is the maximum operating frequency of the LM3S1958-EQC50-A2?
The LM3S1958-EQC50-A2 operates at a maximum system clock frequency of 50 MHz, achieved via an internal PLL that multiplies the crystal or external clock input. This frequency applies to the CPU core, bus matrix, and all synchronous peripherals-including the ADC, UARTs, and timers-ensuring deterministic real-time performance across the full feature set of the LM3S1958-EQC50-A2.
Does the LM3S1958-EQC50-A2 support hardware debugging?
Yes, the LM3S1958-EQC50-A2 includes a standard ARM JTAG debug interface compliant with IEEE 1149.1, supporting full boundary-scan testing, real-time tracing via TPIU, and integrated SWD-compatible debug access. Development tools such as TI's ICDI-based debuggers and third-party JTAG adapters fully support the LM3S1958-EQC50-A2 for breakpoint setting, register inspection, and flash programming.
Can the LM3S1958-EQC50-A2 operate in hibernate mode with the RTC running?
Yes, the LM3S1958-EQC50-A2 supports hibernate mode with the RTC active using either the internal 32.768 kHz oscillator or an external crystal. In this state, the device draws less than 1 µA while maintaining calendar time, storing up to 2 KB of data in battery-backed RAM, and waking on RTC match or external pin assertion-enabling long-term autonomous operation in battery-powered LM3S1958-EQC50-A2 deployments.
What ADC resolution and sampling rate does the LM3S1958-EQC50-A2 provide?
The LM3S1958-EQC50-A2 integrates a 12-bit successive-approximation ADC with up to 1 MSPS conversion rate and hardware-supported averaging (up to 64 samples per result). It supports eight analog input channels, sequencer-based triggering, and differential sampling modes-making it suitable for precision sensor interfacing in applications where signal integrity and noise rejection are critical for the LM3S1958-EQC50-A2.
Is the LM3S1958-EQC50-A2 pin-compatible with other Stellaris LM3S devices?
No, the LM3S1958-EQC50-A2 is not pin-compatible with most other LM3S variants due to its unique 100-pin LQFP package and specific peripheral mapping-particularly the hibernation module signals (HIB, RTCCLK, RTCEN) and expanded GPIO count. While some smaller-pin-count LM3S parts share functional similarities, direct PCB replacement requires verification of pin assignment, power domain routing, and thermal pad layout for the LM3S1958-EQC50-A2.
LM3S1958-EQC50-A2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 1000
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- I2C, IrDA, Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 52
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 64K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.25V ~ 2.75V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S1958-EQC50-A2 FAQ
1.How can I place an order for LM3S1958-EQC50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1958-EQC50-A2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM3S1958-EQC50-A2 reliable?
The price and inventory of LM3S1958-EQC50-A2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S1958-EQC50-A2 is usually 5 days.
3.What payment methods are accepted for LM3S1958-EQC50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1958-EQC50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S1958-EQC50-A2?
LM3S1958-EQC50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1958-EQC50-A2 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM3S1958-EQC50-A2?
For technical support, including LM3S1958-EQC50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1958-EQC50-A2 requirements.
6.How does Aetrix verify that LM3S1958-EQC50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S1958-EQC50-A2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM3S1958-EQC50-A2 meets industry standards.
7.What is the process for return or replacement of LM3S1958-EQC50-A2?
All LM3S1958-EQC50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1958-EQC50-A2, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM3S1958-EQC50-A2 part is unused and in its original packaging.
Return procedure for LM3S1958-EQC50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3S1958-EQC50-A2 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
