ATSAM4LS8BA-AU - Cortex-M4 48MHz 512KB MCU | Microchip
MPN: ATSAM4LS8BA-AU ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.84 | $5.84 |
| 10 | $5.42 | $54.20 |
| 100 | $4.92 | $492.00 |
| 500 | $4.61 | $2,305.00 |
| 1,000 | $4.34 | $4,340.00 |
ATSAM4LS8BA-AU Overview
A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip. Within the semiconductor hierarchy, the ATSAM4LS8BA-AU sits at: ARM Cortex-M4 MCU -> 32-bit microcontroller -> SAM4L family -> embedded processing -> semiconductor device. MCUs are the core building blocks of embedded systems, controlling sensors, actuators, and communication interfaces in everything from consumer gadgets to industrial equipment.
Key differentiating features include the Cortex-M4 core with DSP instructions, an integrated USB 2.0 device controller, a Peripheral Event System that routes signals between peripherals without CPU intervention, and the proprietary SleepWalking technology that lets peripherals operate autonomously while the core sleeps. These attributes make it exceptionally well suited to battery-powered and energy-harvesting designs that still require substantial processing throughput.
The SAM4L architecture also integrates a flash accelerator for zero-wait-state execution at full speed, multiple low-power sleep modes, an AES/DES cryptographic option on sibling parts, and analog peripherals including a 12-bit ADC and DAC. The wide 1.62V to 3.6V operating supply range supports direct operation from single-cell lithium and 3.3V industrial rails.
Typical applications include portable medical instruments, battery-powered metering, IoT sensor nodes, consumer appliance control, and industrial monitoring where long battery life is a design requirement. The 48 MHz Cortex-M4 with hardware divide and single-cycle MAC handles digital filtering and control loops efficiently.
A key design consideration is power budgeting: exploit the SleepWalking peripheral system and fast wake-up to remain in the deepest possible sleep mode between events, since active current dominates the energy profile in duty-cycled systems.
This page synthesizes distributor pricing from multiple sources, drop-in family alternatives, and practical design guidance not found in the manufacturer datasheet alone. Pricing references are as of 2026-09-20.
Drop-in alternatives for ATSAM4LS8BA-AU — 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 ATSAM4LS8BA-AU (same form factor and footprint) — differing in Package, Packaging, Series, Core Processor, Flash Memory.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAM4LC8BA-UUR
✅ Drop-In✓ In Stock
$3.95 / Unit
View Datasheet →ATSAM4LC8BA-AUR
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAM4LS8BA-AUR
✅ Drop-In✓ In Stock
$4.72 / Unit
View Datasheet →ATSAM4LS8CA-AU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$12.45 / Unit
View Datasheet →ATSAM4LS4BA-AU
✅ Drop-In✓ In Stock
$6.02 / Unit
View Datasheet →ATSAM4LS8BA-AU Maximum Ratings & Electrical Characteristics
| Core Processor | ARM Cortex-M4 |
| Core Size | 32-bit |
| Maximum Clock Frequency | 48 MHz |
| Flash Memory Size | 512KB (512K x 8) |
| SRAM Size | 64KB |
| Supply Voltage Range | 1.62 V to 3.6 V |
| Operating Supply Voltage | 1.8 V / 2.5 V / 3.3 V |
| Active Mode Current | 90 uA/MHz |
| Sleep Mode Current | 1.5 uA |
| Wake-up Time | down to 1.5 us |
| Package | 64-TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Temperature Grade | Industrial |
| Connectivity | USB Device |
| Series | SAM4L |
| Packaging | Tray |
| Terminal Form | Gull Wing |
ATSAM4LS8BA-AU 64-tqfp (10x10 mm) Pin Configuration Guide
Pin configuration for ATSAM4LS8BA-AU (64-tqfp (10x10 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for ATSAM4LS8BA-AU.
Refer to the datasheet for full pin configuration.
Typical Applications
ATSAM4LS8BA-AU is suitable for 6 applications: Battery-Powered Metering, Portable Medical Instruments, IoT Sensor Nodes, Consumer Appliance Control, Industrial Condition Monitoring, USB Consumer Peripherals.
Battery-Powered Metering
Smart water, gas, and electricity meters must run for 10-15 years on a single battery, making the ATSAM4LS8BA-AU's 90 uA/MHz active current, 1.5 uA sleep current, and 1.5 us wake-up ideal. The SleepWalking system lets the MCU poll the flow sensor and accumulate pulses via the peripheral event system while the Cortex-M4 core stays asleep, multiplying battery life versus designs that wake the CPU for every event. Placed on a 3.0V lithium thionyl chloride rail directly, it eliminates an LDO quiescent penalty. The 512KB flash stores metering firmware, calibration tables, and a bootloader for OTA updates over the meter communication link.
Recommended
Portable Medical Instruments
Handheld blood-pressure monitors, glucose meters, and pulse oximeters need both signal processing throughput and long battery run time. The ATSAM4LS8BA-AU's Cortex-M4 core with DSP instructions executes digital filtering on ADC samples at 48 MHz while drawing only 90 uA/MHz, and its 12-bit ADC captures physiological signals directly. SleepWalking allows continuous sensor monitoring with scheduled CPU wake-ups, extending operation across multiple patient shifts on a rechargeable cell. The 64KB SRAM buffers waveform data for on-screen display, and the USB device port provides data offload to clinical systems without a separate interface chip.
Recommended
IoT Sensor Nodes
Wireless sensor nodes spend most of their life asleep, waking briefly to sample, process, and transmit. The ATSAM4LS8BA-AU's 1.5 uA sleep current and 1.5 us wake-up minimize the energy cost of these duty cycles, while the Cortex-M4 core runs protocol stacks and sensor-fusion algorithms that 8-bit MCUs cannot handle. The Peripheral Event System routes timer and ADC events without core intervention, and the 512KB flash accommodates a full TCP/UDP or BLE host stack plus application code and OTA bootloader. Running from 1.8V to 3.6V, it pairs directly with single-cell lithium or boost-regulated supplies.
Recommended
Consumer Appliance Control
Washing machines, rice cookers, and HVAC controls require motor sequencing, user-interface handling, and sensor acquisition at low unit cost. The ATSAM4LS8BA-AU provides 48 MHz Cortex-M4 performance for PID control loops, ample 512KB flash for multi-language UI assets and update-safe dual-image firmware, and industrial temperature rating for appliance environments. The gull-wing 64-TQFP (10x10 mm) footprint supports two-layer control boards with cost-effective assembly. Its 1.62-3.6V supply range and low standby consumption help products meet standby-power regulations, while fast wake-up keeps touch sensing responsive from deep sleep.
Recommended
Industrial Condition Monitoring
Vibration and temperature monitoring nodes on factory machinery sample accelerometers continuously and run FFT analysis locally. The ATSAM4LS8BA-AU's Cortex-M4 DSP instructions (single-cycle MAC, hardware divide) accelerate spectral analysis, while the 64KB SRAM holds sample windows for batch processing. SleepWalking allows the ADC and timers to capture data on schedule with the core asleep between windows, and the industrial temperature grade suits cabinet-mounted electronics. The USB device interface enables field diagnostics from a laptop, and 512KB flash stores logging firmware plus a failsafe image for recovery after power interruptions.
Recommended
USB Consumer Peripherals
Devices such as payment terminals, barcode scanners, and audio accessories benefit from the ATSAM4LS8BA-AU's integrated USB 2.0 device controller, which removes the need for a separate USB interface chip. The 48 MHz Cortex-M4 processes endpoint traffic and application logic concurrently, the 512KB flash holds descriptors, class drivers, and application firmware with room for field updates, and the flash accelerator ensures zero-wait-state execution during bus transactions. Low sleep current supports suspend-mode compliance, keeping standby draw within USB specification while allowing remote wake-up in 1.5 us from the bus resume event.
Recommended
Recommended Products Summary
Engineering reference data for ATSAM4LS8BA-AU — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAM4LC8BA-UUR | ATSAM4LC8BA-AUR | ATSAM4LS8BA-AUR | ATSAM4LS4BA-AU |
|---|---|---|---|---|---|
| Package | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Clock | ARM Cortex-M4, 48 MHz | ARM Cortex-M4, 48 MHz | ARM Cortex-M4, 48 MHz | ARM Cortex-M4, 48 MHz | ARM Cortex-M4, 48 MHz |
| Flash Memory | 512KB | 512KB | 512KB | 512KB | 256KB |
| SRAM | 64KB | 64KB | 64KB | 64KB | 64KB |
| Hardware Crypto (AES/DES) | No | Yes | Yes | No | No |
| Packaging | Tray | Tape & Reel | Tape & Reel | Tape & Reel | Tray |
Key Differentiators
- Lowest-power Cortex-M4 in its class (vs ATSAM4S8BA-AU (SAM4S series))
- No crypto engine trade-off (vs ATSAM4LC8BA-UUR)
- Double the flash at same footprint (vs ATSAM4LS4BA-AU)
Design Notes
Design the power tree around the 1.62-3.6V supply window. For battery products, connect the cell directly or through a low-Iq LDO and place 100 nF ceramic decoupling at every VDD/VDDIO pin pair plus bulk 10 uF near the supply entry. Exploit the low-power modes: budget energy against the 90 uA/MHz active figure, meaning a 48 MHz continuous task draws roughly 4.3 mA. Duty-cycle the core aggressively and use SleepWalking so peripherals run while the core sleeps at 1.5 uA.
The 64-TQFP (10x10 mm) land pattern follows the standard TQFP-64 footprint with 0.5 mm pitch. Keep the USB D+/D- traces as a matched-length 90-ohm differential pair routed away from clock lines, and place the 1.5 kOhm pull-up on D+ per the USB full-speed spec as directed in the manufacturer datasheet. Decouple the VDDUSB pin separately from the core rails. Provide solid ground pour under the chip and connect all GND pins directly to it.
Do not assume the SAM4L register map matches the SAM4S series; peripheral names and clock-gating differ, and code ported between them needs review. Verify flash erase/program voltage margins during in-application programming: flash writes require adequate supply headroom per the manufacturer datasheet. When selecting the crypto-equipped ATSAM4LC8BA as a substitute, remember to also update the device header and enable the crypto clocks in your firmware, since the AES/DES controller is present only on the LC variant.
Compliance Information
Distributor listings describe the part as 'TQFP, GREEN, IND TEMP, MRL A', indicating lead-free green packaging per Microchip conventions; formal RoHS/REACH declarations should be obtained from Microchip product documentation.
