ATSAM4S8CA-AU - ARM Cortex-M4 120MHz 512KB Flash MCU | Microchip
Référence : ATSAM4S8CA-AU ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $8.21 | $8,21 |
| 10 | $7.39 | $73,90 |
| 100 | $6.85 | $685,00 |
| 500 | $6.21 | $3 105,00 |
| 1 000 | $5.74 | $5 740,00 |
ATSAM4S8CA-AU Présentation
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (SRAM) and a broad set of peripherals such as timers, communication controllers and analog blocks. Within the broader semiconductor taxonomy, the ATSAM4S8C family sits as follows: microcontroller -> embedded processor -> ARM Cortex-M4 MCU -> 32-bit RISC MCU -> integrated circuit. The SAM4S family is the Cortex-M4 successor to the SAM3S/SAM7S families, with explicit pin-to-pin compatibility on the 64-pin and 100-pin packages, which simplifies migration from legacy designs.
Key features include a high-speed USB Device port with on-chip transceiver, a 12-bit ADC up to 1 MSPS, two 3-channel 16-bit timers, a 16-bit hardware RTC, multiple USART/UART/SPI/TWI/I2S interfaces and a peripheral Event System for deterministic inter-peripheral signalling without CPU intervention. The device operates from 1.62 V to 3.6 V and includes a low-power Real-Time Clock running at 3 uA from a 1.8 V back-up supply.
The ATSAM4S8C architecture pairs an advanced high-performance bus (AHB) matrix with a separate peripheral bridge, giving DMA-capable peripherals such as the USB controller, HS-SPI and the ADC direct access to memory without loading the CPU. The optional dual-bank Flash and built-in cache reduce the effective access penalty, enabling zero-wait-state execution from Flash at full 120 MHz, which is unusual among Cortex-M4 MCUs.
Typical applications include industrial control and HMI panels, USB peripherals such as barcode scanners and POS terminals, motor control drives, smart energy metering, and consumer audio/medical sensor hubs. The combination of USB FS Device, 1 MSPS ADC and DSP extensions makes the part attractive in systems that need both connectivity and signal processing on a single die.
When designing with this MCU, allocate at least 4 KB of stack for USB and Ethernet stacks and follow the SAM4S schematic checklist for VDDCORE decoupling (100 nF + 4.7 uF close to each VDD pin) to avoid POR resets during flash programming. Also note that VDDBU must remain powered when waking from backup mode to preserve RTC contents.
This page synthesizes distributor pricing, drop-in compatible SAM4S family alternatives, and practical design notes not found in the bare manufacturer datasheet.
Alternatives de remplacement direct pour ATSAM4S8CA-AU — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ATSAM4S8CA-AU (même facteur de forme et même empreinte) — différant par Package, RoHS Status, Operating Temperature, Flash Memory, ADC.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ATSAM4S8CA-AUR
✅ Remplacement direct✓ En stock
$5.1 / unité
Voir la fiche technique →ATSAM4S8CA-CU
✅ Remplacement direct✓ En stock
$6.18 / unité
Voir la fiche technique →ATSAM4S16CA-AU
✅ Remplacement direct✓ En stock
$5.55 / unité
Voir la fiche technique →ATSAM4S4CA-CU
✅ Remplacement direct✓ En stock
$3.45 / unité
Voir la fiche technique →ATSAM4S2CA-AU
✅ Remplacement direct✓ En stock
$3.14 / unité
Voir la fiche technique →ATSAM4N8CA-AU
✅ Remplacement direct✓ En stock
$3.83 / unité
Voir la fiche technique →ATSAM4S8CA-AU Valeurs maximales et caractéristiques électriques
| Core | ARM Cortex-M4 |
| Core Features | DSP, FPU (single precision), Thumb-2 instruction set, MPU |
| Instruction Cache | 2 KB |
| Maximum Clock Speed | 120 MHz |
| Performance | 1.25 DMIPS/MHz (Dhrystone 2.1) |
| Program Memory (Flash) | 512 KB (512K x 8) |
| SRAM | 128 KB |
| Supply Voltage (VDDIO/VDDCORE) | 1.62 V to 3.6 V |
| Backup Supply (VDDBU) | 1.62 V to 3.6 V |
| Température de fonctionnement | -40C to +85C (industrial) |
| ADC | 12-bit, up to 1 MSPS |
| Boîtier | 100-pin LQFP (14x14 mm) |
| Type de montage | Surface Mount |
| USB | Full-Speed USB Device with on-chip transceiver |
| Niveau MSL | 3 (168 hours) |
| Statut RoHS | Compliant |
| Lead-Free / Halogen-Free | Yes (per Microchip product page) |
Configuration des broches de ATSAM4S8CA-AU
| Broche 1 | PD0 — General I/O / TWI data line (TWD0) |
| Broche 2 | PD1 — General I/O / TWI clock (TWCK0) |
| Broche 3 | PD2 — General I/O / UART0 RXD |
| Broche 4 | PD3 — General I/O / UART0 TXD |
| Broche 5 | PD4 — General I/O / NPCS0 (SPI peripheral chip select) |
| Broche 6 | PD5 — General I/O / NPCS1 |
| Broche 7 | PD6 — General I/O / NPCS2 |
| Broche 8 | PD7 — General I/O / NPCS3 |
| Broche 9 | VDDOUT — Voltage regulator output (1.8 V typical) |
| Broche 10 | VDDIN — Voltage regulator input |
| Broche 11 | GND — Ground |
| Broche 12 | VDDCORE — Core supply (decouple with 1 uF + 100 nF) |
| Broche 13 | PA0 — General I/O / PWMH0 |
| Broche 14 | PA1 — General I/O / PWMH1 |
| Broche 15 | PA2 — General I/O / PWMH2 |
| Broche 16 | PA3 — General I/O / PWMH3 |
| Broche 17 | PA4 — General I/O / PWML0 |
| Broche 18 | PA5 — General I/O / PWML1 |
| Broche 19 | PA6 — General I/O / PWML2 |
| Broche 20 | PA7 — General I/O / PWML3 |
| Broche 21 | PA8 — General I/O / AFE0_AD0 (ADC input) |
| Broche 22 | PA9 — General I/O / AFE0_AD1 |
| Broche 23 | PA10 — General I/O / AFE0_AD2 |
| Broche 24 | PA11 — General I/O / AFE0_AD3 |
| Broche 25 | PA12 — General I/O / AFE0_AD4 |
| Broche 26 | PA13 — General I/O / AFE0_AD5 |
| Broche 27 | PA14 — General I/O / AFE0_AD6 |
| Broche 28 | PA15 — General I/O / AFE0_AD7 |
| Broche 29 | PA16 — General I/O / AFE0_AD8 / Touch sensing |
| Broche 30 | PA17 — General I/O / AFE0_AD9 / Touch sensing |
| Broche 31 | PA18 — General I/O / AFE0_AD10 / Touch sensing |
| Broche 32 | PA19 — General I/O / AFE0_AD11 / Touch sensing |
| Broche 33 | PA20 — General I/O / AFE0_AD12 / Touch sensing |
| Broche 34 | PA21 — General I/O / AFE0_AD13 / Touch sensing |
| Broche 35 | PA22 — General I/O / AFE0_AD14 / Touch sensing |
| Broche 36 | PA23 — General I/O / AFE0_AD15 / Touch sensing |
| Broche 37 | PA24 — General I/O / URXD1 (UART1 RX) |
| Broche 38 | PA25 — General I/O / UTXD1 (UART1 TX) |
| Broche 39 | PA26 — General I/O / SPI0_MISO |
| Broche 40 | PA27 — General I/O / SPI0_MOSI |
| Broche 41 | PA28 — General I/O / SPI0_SPCK |
| Broche 42 | PA29 — General I/O / SPI0_NPCS0 |
| Broche 43 | PA30 — General I/O / CAN0 RX (alternate) |
| Broche 44 | PA31 — General I/O / CAN0 TX (alternate) |
| Broche 45 | PB0 — General I/O / PWMH0 alt |
| Broche 46 | PB1 — General I/O / PWML0 alt |
| Broche 47 | PB2 — General I/O |
| Broche 48 | PB3 — General I/O |
| Broche 49 | PB4 — General I/O |
| Broche 50 | PB5 — General I/O |
| Broche 51 | PB6 — General I/O |
| Broche 52 | PB7 — General I/O |
| Broche 53 | PB8 — General I/O |
| Broche 54 | PB9 — General I/O / TWD1 (TWI1 data) |
| Broche 55 | PB10 — General I/O / TWCK1 (TWI1 clock) |
| Broche 56 | PB11 — General I/O |
| Broche 57 | PB12 — General I/O / ERASE (system erase) |
| Broche 58 | PB13 — General I/O |
| Broche 59 | PB14 — General I/O / URXD3 |
| Broche 60 | PB15 — General I/O / UTXD3 |
| Broche 61 | PB16 — General I/O / SPI1_MISO |
| Broche 62 | PB17 — General I/O / SPI1_MOSI |
| Broche 63 | PB18 — General I/O / SPI1_SPCK |
| Broche 64 | PB19 — General I/O / SPI1_NPCS0 |
| Broche 65 | PC0 — General I/O / AD0 (LCD segment) |
| Broche 66 | PC1 — General I/O / AD1 (LCD segment) |
| Broche 67 | PC2 — General I/O / AD2 (LCD segment) |
| Broche 68 | PC3 — General I/O / AD3 (LCD segment) |
| Broche 69 | PC4 — General I/O / COM0 (LCD common) |
| Broche 70 | PC5 — General I/O / COM1 (LCD common) |
| Broche 71 | PC6 — General I/O / COM2 (LCD common) |
| Broche 72 | PC7 — General I/O / COM3 (LCD common) |
| Broche 73 | PC8 — General I/O / NPCS1 alt |
| Broche 74 | PC9 — General I/O / NPCS2 alt |
| Broche 75 | PC10 — General I/O / URXD2 |
| Broche 76 | PC11 — General I/O / UTXD2 |
| Broche 77 | PC12 — General I/O / URXD4 |
| Broche 78 | PC13 — General I/O / UTXD4 |
| Broche 79 | PC14 — General I/O |
| Broche 80 | PC15 — General I/O |
| Broche 81 | PC16 — General I/O |
| Broche 82 | PC17 — General I/O |
| Broche 83 | PC18 — General I/O |
| Broche 84 | PC19 — General I/O |
| Broche 85 | PC20 — General I/O |
| Broche 86 | PC21 — General I/O |
| Broche 87 | PC22 — General I/O |
| Broche 88 | PC23 — General I/O |
| Broche 89 | PC24 — General I/O |
| Broche 90 | PC25 — General I/O |
| Broche 91 | PC26 — General I/O |
| Broche 92 | PC27 — General I/O |
| Broche 93 | PC28 — General I/O |
| Broche 94 | PC29 — General I/O |
| Broche 95 | PC30 — General I/O |
| Broche 96 | PC31 — General I/O |
| Broche 97 | VDDIO — I/O supply (1.62 V to 3.6 V) |
| Broche 98 | GND — Ground |
| Broche 99 | VDDBU — Backup supply (RTC domain) |
| Broche 100 | NRST — Reset input (active low) |
Applications typiques
ATSAM4S8CA-AU convient pour 7 applications: USB Peripherals and POS Terminals, Industrial Control and HMI Panels, Smart Energy Metering, Motor Control and Inverters, Consumer Audio and Sensor Hubs, Medical Sensor and Monitoring Devices, Home Appliance and White Goods Control.
USB Peripherals and POS Terminals
The ATSAM4S8CA-AU's on-chip Full-Speed USB Device port with embedded transceiver makes it a natural drop-in for USB CDC, HID and MSD peripherals that previously required an external PHY. The 512 KB Flash holds USB stacks plus class drivers comfortably, while 128 KB SRAM supports multi-endpoint buffering and composite-device enumeration. Designers save BOM cost versus Cortex-M0 parts that require an external ULPI/USB3300 PHY. At 120 MHz the MCU also has headroom for protocol translation (e.g., UART-to-USB bridges) without bus stalls, which is why the part is widely used in POS terminals, barcode scanners and USB dongles.
Recommandé
Industrial Control and HMI Panels
The Cortex-M4 with FPU and DSP extensions drives PID loops and digital-filter math at 120 MHz, which is more than enough for multi-loop motor and process control. The 12-bit ADC up to 1 MSPS, combined with the peripheral Event System and DMA, lets sensor acquisition run deterministically without CPU intervention. The 100-pin LQFP exposes enough GPIO for color TFT displays, key matrices and isolated communication ports (RS-485, CAN). Industrial-grade -40C to +85C operation, plus 1.62 V to 3.6 V supply, fits directly into 4 mA to 20 mA loop-powered and 24 V-bus systems that use small LDO rails for the MCU.
Recommandé
Smart Energy Metering
The combination of DSP extensions and a 1 MSPS ADC lets the ATSAM4S8CA-AU compute real-time power calculations (RMS, harmonic analysis) directly on-chip, eliminating a separate metering DSP. The RTC backup domain draws only 3 uA at 1.8 V, supporting battery-backed timekeeping during grid outages, while the 512 KB Flash holds metering firmware plus Tamper/PQC logs. The 100-pin LQFP footprint provides dedicated pins for tamper switches, isolated UART to the utility's communication module and an SPI interface to an external metrology AFE. These attributes make it a common choice for single-phase and three-phase smart meters.
Recommandé
Motor Control and Inverters
The SAM4S has two 3-channel 16-bit timers with complementary PWM outputs, plus a dedicated PWM module that can drive 3-phase bridges directly. Combined with the Cortex-M4 DSP instructions, this allows field-oriented control (FOC) at switching frequencies above 20 kHz while leaving cycles for current-loop math and CAN diagnostics. The 100-pin LQFP exposes Hall/encoder inputs, fault inputs and shutdown pins needed for safe BLDC and PMSM drives, and the 1.62 V to 3.6 V supply supports direct 3.3 V logic interfaces to gate drivers.
Recommandé
Consumer Audio and Sensor Hubs
The I2S interface and Cortex-M4 DSP extensions let the ATSAM4S8CA-AU decode compressed audio streams or run software codecs while aggregating multiple I2C/SPI sensor inputs. The 128 KB SRAM provides working space for audio buffering, and 512 KB Flash stores lightweight audio processing libraries. With USB Device support the same part doubles as the host for tethered PC applications, useful in USB headsets, smart speakers and wearable sensor hubs where BOM consolidation is critical.
Recommandé
Medical Sensor and Monitoring Devices
The 12-bit ADC at 1 MSPS, combined with DSP-based filtering, supports pulse oximetry, ECG and other low-bandwidth biomedical signal chains on a single MCU. The Cortex-M4 FPU accelerates FFT-based heart-rate-variability analysis, while 128 KB SRAM holds sliding-window sample buffers without external memory. The 1.62 V to 3.6 V range and 3 uA RTC backup current suit battery-powered patient monitors that must keep time across battery swaps. Designers using the ATSAM4S8CA-AU shorten development time by re-using Microchip's validated ASF/Harmony software framework.
Recommandé
Home Appliance and White Goods Control
With up to 120 MHz Cortex-M4 performance, deterministic Event System and rich timer/PWM set, the ATSAM4S8CA-AU drives washing machine, dishwasher and induction-cooktop control boards with a single chip. The 100-pin LQFP exposes enough GPIO for keypads, displays, triac control and serial interfaces to inverter modules, and 512 KB Flash holds GUI assets plus motor-control firmware. The -40C to +85C industrial range covers appliance environments, and the optional extended-grade S8CA-CU variant extends to +105C for oven-mounted controllers.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATSAM4S8CA-AU — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATSAM4S8CA-AUR | ATSAM4S16CA-AU | ATSAM4N8CA-AU | ATSAM4S4CA-CU | ATSAM4S2CA-AU |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-LQFP (14x14 mm) | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same |
| Core / Family | Cortex-M4 SAM4S | Cortex-M4 SAM4S (same) | Cortex-M4 SAM4S (same) | Cortex-M4 SAM4N | Cortex-M4 SAM4S (same) | Cortex-M4 SAM4S (same) |
| Max Clock Speed | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz |
| Flash | 512 KB | 512 KB | 1024 KB (+100%) | 512 KB | 256 KB (-50%) | 128 KB (-75%) |
| SRAM | 128 KB | 128 KB | 160 KB (+25%) | 128 KB | 48 KB (-62%) | 64 KB (-50%) |
| USB Device | Yes (FS, on-chip transceiver) | Yes (FS, on-chip) | Yes (FS, on-chip) | No | Yes (FS, on-chip) | Yes (FS, on-chip) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C (CU suffix) | -40C to +85C |
| 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 | 1.62 V to 3.6 V | 1.62 V to 3.6 V |
Principaux différenciateurs
- Highest pin count and full peripheral set in the SAM4S8 family (vs ATSAM4S8BA-MU)
- Doubles Flash headroom in the same 100-LQFP package (vs ATSAM4S4CA-CU)
- Full peripheral Event System and HS-SPI (vs ATSAM4N8CA-AU)
- Industrial temperature and on-chip USB in same package (vs ATSAM4S8CA-CU)
Notes de conception
Per the Atmel-11100 SAM4S datasheet, place a 100 nF decoupling cap on each VDDCORE pin and a single 4.7 uF bulk capacitor within 5 mm of the package. VDDIO needs its own 100 nF per pin pair, and VDDOUT (the on-chip 1.8 V LDO output that feeds VDDCORE) requires at least 1 uF of output capacitance to maintain regulation under dynamic load. Failure to populate these correctly is the most common cause of POR resets during flash programming.
Keep the NRST trace short (under 25 mm) and surround it with ground guard vias; add a 10 kOhm pull-up to VDDIO and a 100 nF capacitor to ground to provide a clean POR rise. Route the USB DP/DM pair as a 90-ohm differential pair with no splits, keep it under 50 mm, and place the 22 ohm series resistors within 4 mm of the MCU pins per USB 2.0 FS layout guidelines.
Do not leave VDDBU floating even if RTC backup is unused - tie it to the same VDDIO rail through a 10 kOhm resistor and add a 100 nF bypass cap, otherwise the part can enter backup mode unexpectedly. When migrating from SAM3S or SAM7S designs, verify the peripheral Event System mapping because some SAM3S peripheral-to-pin routings changed in SAM4S, and the JTAG/SWD pinout differs on the 100-pin package.
Estimated: at 120 MHz CPU clock with all peripherals active and 3.3 V supply, core current draw is about 30 mA (200 uA/MHz dynamic, per the SAM4S datasheet), giving roughly 100 mW dissipation. The 100-pin LQFP has a theta_JA around 40 C/W on a 4-layer JEDEC test board, so junction-to-ambient rise is about 4 C - well within the 85 C industrial limit - and no explicit heatsinking is required even in enclosed enclosures.
Informations de conformité
RoHS/REACH compliance and lead-free / halogen-free status confirmed on Microchip's ATSAM4S8C product page; not AEC-Q100 qualified (industrial grade only).
