ATSAM4S4BB-ANR - 120MHz Cortex-M4 MCU 256KB Flash | Microchip
MPN: ATSAM4S4BB-ANR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.07 | $6.07 |
| 10 | $5.71 | $57.10 |
| 100 | $5.46 | $546.00 |
| 500 | $5.24 | $2,620.00 |
| 1,000 | $5.01 | $5,010.00 |
ATSAM4S4BB-ANR Overview
A microcontroller unit (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and a rich set of peripherals onto one die. Within the semiconductor hierarchy, the ATSAM4S4BB-ANR belongs to the ARM Cortex-M4 32-bit MCU class, the broader SAM4S Flash MCU family from Microchip (formerly Atmel), and the general category of embedded processors used in industrial and consumer electronic systems.
Key features include the Cortex-M4 core with DSP instructions and Thumb-2 instruction set, a Memory Protection Unit (MPU), dual-bank Flash with ECC, Security Bit and Lock Bits for code protection, and a wide 1.62 V to 3.6 V single-supply operating range. The DSP extension set accelerates filter and control math, while the MPU supports functional-safety and RTOS memory partitioning.
Architecturally, the device uses an ARMv7E-M Harvard pipeline with a dedicated AHB bus matrix, allowing parallel flash-execution and peripheral DMA traffic. Power consumption is optimized for the SAM4S family, supporting low-power sleep, wait, and backup modes suitable for battery-operated nodes.
Typical applications include industrial control and factory automation, motor control and power conversion, building automation and IoT sensor nodes, and consumer appliances requiring deterministic 32-bit control with DSP capability.
A key design consideration: the ANR suffix denotes Tape-and-Reel packaging and industrial temperature operation; the SAM4S series is pin-to-pin compatible with SAM4N, SAM3S, SAM3N and SAM7S devices in the 64-pin version, which simplifies in-family migration but does not extend to other vendors' MCUs.
This page synthesizes distributor pricing, drop-in SAM4S family alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATSAM4S4BB-ANR — 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 ATSAM4S4BB-ANR (same form factor and footprint) — differing in Package, Packaging, RoHS Status, Series, Flash Features.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAM4S16BB-ANR
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →ATSAM4S2BB-ANR
✅ Drop-In✓ In Stock
$3.62 / Unit
View Datasheet →ATSAM4S4AB-AN
✅ Drop-In✓ In Stock
$3.55 / Unit
View Datasheet →ATSAM4S4AA-AN
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →ATSAM4S4BB-ANR Maximum Ratings & Electrical Characteristics
| Core Processor | ARM Cortex-M4 |
| Core Size | 32-bit |
| Maximum Clock Frequency | 120 MHz |
| Flash Memory | 256 KB (256K x 8) |
| SRAM | 64 KB |
| Supply Voltage Range | 1.62 V to 3.6 V |
| Core Supply Voltage | 1.2 V (internal regulator) |
| Instruction Set | Thumb-2 with DSP instructions |
| Memory Protection | MPU (Memory Protection Unit) |
| Flash Features | Dual-bank Flash, ECC, Security Bit, Lock Bits |
| Package | 64-LQFP (10 x 10 mm) |
| Mounting Type | Surface Mount |
| Temperature Grade | Industrial |
| Packaging | Tape & Reel (R suffix) |
| Pin Count | 64 |
| Family Compatibility | Pin-to-pin compatible with SAM4N, SAM3S, SAM3N, SAM7S (64-pin) |
| RoHS Status | Compliant (GREEN, per Mouser listing) |
| Product Series | SAM4S (SAM4S4B) |
ATSAM4S4BB-ANR 64-lqfp (10 x 10 mm) Pin Configuration Guide
Pin configuration for ATSAM4S4BB-ANR (64-lqfp (10 x 10 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 ATSAM4S4BB-ANR.
Refer to the datasheet for full pin configuration.
Typical Applications
ATSAM4S4BB-ANR is suitable for 6 applications: Industrial Control and Factory Automation, Motor Control and Power Conversion, Building Automation and IoT Sensor Nodes, Consumer Appliances, Medical and Diagnostic Devices, Legacy SAM7S/SAM3S System Migration.
Industrial Control and Factory Automation
The ATSAM4S4BB-ANR fits industrial control nodes that need deterministic 32-bit processing: its 120 MHz Cortex-M4 core with single-cycle DSP MAC accelerates PID and filter computations, while 256 KB dual-bank Flash holds application plus field-update capacity and the MPU isolates RTOS tasks for safety-relevant logic. Typical deployments include PLC I/O modules, sensor hubs on RS-485/Modbus via its USARTs, and machine-state controllers using its timers and PWM channels. Executing from Flash on the AHB bus matrix keeps interrupt latency predictable under DMA load; the industrial temperature grade and Tape-and-Reel -ANR ordering suit automated production of long-life factory equipment.
Recommended
Motor Control and Power Conversion
For BLDC/PMSM motor drives and digital power supplies, the ATSAM4S4BB-ANR provides the computational core for field-oriented control: hardware DSP instructions execute Clarke/Park transforms and current-loop filters within the 10-20 kHz PWM cycle budget at 120 MHz, and its PWM and ADC peripherals with DMA reduce CPU overhead. The 1.62 V to 3.6 V supply range matches standard 3.3 V gate-driver interface levels, and Flash ECC protects control firmware in electrically noisy environments. Designers should reserve SRAM headroom from the 64 KB pool for control-state buffers and validate ADC sampling phase alignment with PWM transitions per the SAM4S datasheet timing specifications.
Recommended
Building Automation and IoT Sensor Nodes
The ATSAM4S4BB-ANR suits connected building devices - thermostats, access controllers, and environmental sensor hubs - that need Ethernet-adjacent connectivity over USART/TWI links plus local control logic. Its dual-bank Flash enables fail-safe OTA firmware updates by executing from one 128 KB bank while the other updates, with Security Bit and Lock Bits guarding the bootloader. SAM4S low-power sleep, wait, and backup modes documented by Microchip extend battery life in duty-cycled nodes, and the wide 1.62 V to 3.6 V supply tolerates battery-rail sag. The 64-pin LQFP gives enough GPIO for displays, keypads, and multiple sensor buses without an external port expander.
Recommended
Consumer Appliances
White goods, HVAC controllers, and kitchen appliances benefit from the ATSAM4S4BB-ANR's balance of DSP-capable control and UI support. The 120 MHz Cortex-M4 handles compressor and fan control loops while the 64 KB SRAM and 256 KB Flash support graphical segment LCD or UART-driven display interfaces, touch decoding over TWI, and multiple sensor inputs. Flash Lock Bits protect proprietary algorithms in cost-sensitive consumer products, and the industrial temperature grade provides margin against harsh in-appliance thermal environments. The standardized 64-pin LQFP footprint simplifies platform reuse across appliance model ranges, letting one PCB serve multiple feature tiers via SAM4S Flash-density variants.
Recommended
Medical and Diagnostic Devices
Portable and benchtop medical instrumentation uses the ATSAM4S4BB-ANR for signal acquisition front-ends: DSP instructions implement IIR/FIR filtering of biopotential or pressure sensor data at 120 MHz, while the MPU partitions firmware for RTOS-based device safety architecture. The 12-bit-class ADC peripherals with DMA stream samples without CPU intervention, and Flash ECC plus Lock Bits maintain firmware integrity appropriate for regulated products. Designers should validate supply-noise performance of the 3.3 V rail and use the SAM4S datasheet's analog specifications when budgeting measurement accuracy. Dual-bank Flash supports controlled, auditable firmware updates required in maintained medical equipment fleets.
Recommended
Legacy SAM7S/SAM3S System Migration
The ATSAM4S4BB-ANR is Microchip's recommended migration target for legacy SAM7S (64-pin) and SAM3S/SAM3N boards, since the SAM4S series is pin-to-pin compatible with those families per the SAM4S datasheet (60001419B). Existing PCBs retain their footprint while gaining a 120 MHz Cortex-M4 with DSP instructions, Flash ECC, and an MPU - roughly a 4x performance uplift over a 55 MHz ARM7TDMI SAM7S. Firmware requires porting because peripherals and toolchain differ, but hardware is preserved. The ATSAM4S4BB-ANR's 256 KB Flash comfortably hosts ported legacy applications, and the active lifecycle status secures long-term sourcing versus end-of-life legacy parts.
Recommended
Recommended Products Summary
Engineering reference data for ATSAM4S4BB-ANR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAM4S16BB-ANR | ATSAM4S2BB-ANR | ATSAM4S4AB-AN |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same |
| Core / Clock | Cortex-M4 @ 120 MHz | Cortex-M4 @ 120 MHz | Cortex-M4 @ 120 MHz | Cortex-M4 @ 120 MHz |
| Flash Memory | 256 KB (dual-bank, ECC) | 1024 KB | 128 KB | 256 KB |
| SRAM | 64 KB | 128 KB | 64 KB | 64 KB |
| Supply Voltage | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V |
| Packaging | Tape & Reel (R suffix) | Tape & Reel | Tape & Reel | Tray |
| Temperature Grade | Industrial | Industrial | Industrial | Industrial |
Key Differentiators
- Balanced 256 KB Flash density with dual-bank OTA capability (vs ATSAM4S2BB-ANR)
- Cost-optimized footprint-compatible choice over 1 MB variant (vs ATSAM4S16BB-ANR)
- Cortex-M4 DSP acceleration versus SAM4N/SAM3S predecessors (vs ATSAM4S4AA-AN)
Design Notes
Power the ATSAM4S4BB-ANR from a clean 3.3 V rail within its 1.62 V to 3.6 V range; the internal regulator generates the 1.2 V core supply - do not drive the core rail externally. Place 0.1 uF ceramic decoupling at every VDD/VDDIO pin pair with at least one 4.7 uF to 10 uF bulk capacitor per supply domain, and follow the SAM4S datasheet (60001419B) power-distribution section for the exact per-pin grouping. Estimated: at 120 MHz full-speed Flash execution, core current is typically in the tens of mA range per Microchip power-consumption data - budget the regulator accordingly with margin for peripheral load.
The 64-LQFP (10x10 mm) footprint requires attention to pin-1 orientation (dot marker, top-left) and land-pattern compliance with the Microchip package drawing. For analog performance, keep the VDDANA/VREF domain routing separate from digital VDDIO, with a local low-pass filter, and route ADC sensor inputs away from switching signals. Use a solid ground plane and stitch via returns near crystal and high-speed signals. The R-suffix Tape-and-Reel parts are moisture-sensitive; observe MSL floor-life and bake per the Microchip packing specification before reflow.
Do not assume cross-brand substitution: only SAM4S/SAM4N/SAM3S/SAM3N/SAM7S devices in the 64-pin version are pin-to-pin compatible per the SAM4S datasheet - STMicro or NXP Cortex-M4 parts are NOT drop-in. When using dual-bank OTA updates, verify that bootloader plus one bank image fits within 128 KB of the 256 KB Flash. Also confirm the exact peripheral set of the ATSAM4S4BB-ANR ordering code against the datasheet ordering-information table before BOM-substituting a related SAM4S4 suffix, since suffix letters encode differing peripheral counts.
Compliance Information
Mouser listing describes the part as 'LQFP,GREEN,IND TEMP,MRL B' - GREEN indicates RoHS/halogen-free compliant packaging. AEC-Q100 qualification not stated in provided data.
