ATMEGAS64M1-KH-SV - 64KB Rad-Tolerant AVR MCU | Microchip
MPN: ATMEGAS64M1-KH-SV β Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ATMEGAS64M1-KH-SV Overview
A microcontroller (MCU) is a single-chip embedded computer integrating a processor core, program and data memory, and peripherals such as timers, communication interfaces, and converters. Within this hierarchy, the ATmegaS64M1 sits in the 8-bit AVR ATmega family, itself a member of the broader microcontroller and embedded processing semiconductor category used across aerospace, industrial, and consumer electronics.
Key features include near-1 MIPS-per-MHz throughput from the AVR enhanced RISC architecture, an integrated CAN controller for robust bus communication, a 10-channel 10-bit ADC and a 10-bit DAC, a 12-bit Power Stage Controller (PSC) for motor drive applications, plus SPI, UART, and 8-bit/16-bit timers with PWM. These peripherals allow a single low-power device to close control loops and communicate on vehicular or spacecraft buses without external companion ICs.
Technically, the ATmegaS64M1 is the radiation-tolerant version of the popular commercial ATmega64M1. It has been developed and manufactured according to the stringent requirements of MIL-PRF-38535 and aerospace specification AEQA0239, with quality and reliability verified through qualification compliant with MIL-PRF-38535 and MIL-STD-883. The ceramic CQFP package and space quality grade address enhanced radiation tolerance, extended temperature, and increased reliability for critical aerospace applications.
Typical applications include satellite motor control, remote terminal units, reaction wheel and valve control, CAN-based spacecraft subsystem communication, and other New Space missions that require a small footprint, low power, and rad-tolerant behavior at lower cost than rad-hard devices.
Design consideration: the 8 MHz maximum clock keeps throughput modest (roughly 8 MIPS), so algorithm-heavy workloads should be sized carefully, but the single-cycle instruction set and integrated PSC deliver excellent real-time motor-control latency at very low power.
This page synthesizes verified distributor data, drop-in family alternatives, and aerospace qualification context not found on distributor listings alone.
Drop-in alternatives for ATMEGAS64M1-KH-SV β 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 ATMEGAS64M1-KH-SV (same form factor and footprint) β differing in Flash Memory, Maximum Clock Frequency, Package, RoHS Status.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMEGAS64M1-KH-MQ
β Drop-Inπ Reference alternative (not in catalog)
ATMEGAS64M1-MA-HP
β Drop-Inπ Reference alternative (not in catalog)
ATMEGA64M1-AU
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$4.16 / Unit
View Datasheet βATMEGAS64M1-KH-SV Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit AVR RISC |
| Maximum Clock Frequency | 8 MHz |
| Flash Memory | 64 KB (64K x 8), ISP with read-while-write |
| EEPROM | 2 KB |
| SRAM | 4 KB |
| Supply Voltage Class | 3.3 V |
| ADC Resolution | 10-bit |
| DAC Resolution | 10-bit |
| Communication Interfaces | CAN, UART, SPI |
| Motor Control Peripheral | 12-bit PSC (Power Stage Controller) |
| Timers | 8-bit and 16-bit timer/counters with PWM |
| Package | 32-CQFP (32-LCQFP leaded ceramic QFP) |
| Mounting Type | Surface Mount |
| Quality Grade | Space Quality Grade, MIL-PRF-38535 / AEQA0239 |
| Radiation Characteristic | Radiation tolerant (version of ATmega64M1) |
| RoHS Status | RoHS3 Compliant (per distributor full-electronic.com) |
| Throughput | Approximately 1 MIPS per MHz |
ATMEGAS64M1-KH-SV 32-cqfp (32-lcqfp leaded ceramic qfp) Pin Configuration Guide
Pin configuration for ATMEGAS64M1-KH-SV (32-cqfp (32-lcqfp leaded ceramic qfp) 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 ATMEGAS64M1-KH-SV.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGAS64M1-KH-SV is suitable for 6 applications: Satellite Motor Control, Remote Terminal Units on CAN Bus, New Space Small Satellite Avionics, Industrial Motor Control Prototyping, Valve and Actuator Control, Telemetry Data Acquisition Nodes.
Satellite Motor Control
The ATMEGAS64M1-KH-SV fits satellite motor control because its integrated 12-bit Power Stage Controller generates high-resolution complementary PWM with dead-time insertion, while the 10-bit ADC closes current and position feedback loops on-chip. Microchip's application overview (document 00002500) explicitly names motor control as a target space application for this device. In a typical reaction wheel or gimbal drive, the MCU reads hall or encoder feedback through the ADC or digital inputs, computes the control loop at up to 8 MHz, and drives the power stage directly from PSC outputs. The radiation-tolerant construction and MIL-PRF-38535 / AEQA0239 qualification make it acceptable for LEO and New Space missions where full rad-hard devices would dominate cost.
Recommended
Remote Terminal Units on CAN Bus
For remote terminal units (RTUs) distributed across a spacecraft or industrial bus, the ATMEGAS64M1-KH-SV provides an integrated CAN controller, eliminating an external CAN IC and its associated board area and failure points. Each RTU can sample analog sensors through the 10-bit ADC, store calibration constants in the 2KB EEPROM, and report over CAN at bus rates standard for vehicular and aerospace networks. The 4KB SRAM and 64KB flash accommodate protocol stacks and local control logic without external memory. Because the device is radiation tolerant and space quality graded under MIL-PRF-38535 and AEQA0239, it is suitable for telemetry/command nodes in satellites, while the low-power AVR core keeps quiescent consumption appropriate for power-limited orbits.
Recommended
New Space Small Satellite Avionics
Small satellite and CubeSat developers choose the ATMEGAS64M1-KH-SV to obtain space-appropriate reliability at New Space cost points. Microchip positions its plastic/ceramic rad-tolerant MCU family as balancing cost, reliability, and radiation resistance for New Space (doEEEt application note). The device's 3.3V supply class matches modern low-voltage avionics rails, and the single-chip integration of CAN, ADC, DAC, and timers reduces part count, a critical mass and reliability driver on small platforms. Designers should size algorithms to the 8 MHz / 8 MIPS ceiling and use the 8-bit and 16-bit timers for housekeeping tasks, reserving the PSC for actuator control. The 32-CQFP ceramic package supports the screening flow required for flight programs.
Recommended
Industrial Motor Control Prototyping
The ATmegaS64M1 inherits its peripheral set from the ATmega64M1, which Microchip designed specifically for motor control; consequently the space device is an excellent fit for ground-based industrial motor drive development that later migrates to flight hardware. The 12-bit PSC produces center-aligned or edge-aligned PWM with programmable dead time, the 10-bit ADC with multiple channels samples phase currents, and the analog comparators support overcurrent protection trips. Because code written for the commercial ATmega64M1 runs unchanged on the ATmegaS64M1, teams can prototype with ATMEGA64M1-AU plastic parts costing far less, then port to the ATMEGAS64M1-KH-SV for radiation-tolerant flight builds with minimal software rework and identical peripheral register maps.
Recommended
Valve and Actuator Control
Spacecraft valve and actuator control benefits from the ATMEGAS64M1-KH-SV combination of robust digital drive and analog feedback. The PSC outputs drive H-bridge or half-bridge power stages for stepper and brushed DC actuators with hardware dead-time protection, while the 10-bit ADC monitors actuator position potentiometers and current sense resistors for stall detection. The 2KB EEPROM retains calibration and cycle-count data across power cycles without battery backup. Its CAN interface lets a central avionics computer command valve sequences over a single bus, and the rad-tolerant qualification addresses the cumulative-dose environment where valves operate throughout mission life. Extended-temperature characterization in the datasheet supports use near propulsion modules.
Recommended
Telemetry Data Acquisition Nodes
Distributed telemetry acquisition nodes use the ATMEGAS64M1-KH-SV to digitize analog health data and stream it over CAN or UART to a spacecraft controller. The 10-bit ADC captures thermistor, strain gauge, and bus-voltage channels, while the 10-bit DAC provides analog reference or control outputs where needed. Read-while-write flash operation allows in-service parameter updates and logging into flash without stalling execution, and the 4KB SRAM buffers burst data between sampling windows. Radiation tolerance and MIL-STD-883-compliant qualification give confidence for nodes that must operate continuously for multi-year missions, and the 8 MHz AVR core performs averaging, filtering, and packetization with ample headroom at very low power draw.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGAS64M1-KH-SV β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGAS64M1-KH-MQ | ATMEGAS64M1-MA-HP | ATMEGA64M1-AU |
|---|---|---|---|---|
| Package | 32-CQFP | 32-CQFP - same | 32-CQFP (MA package option) | TQFP-32 (plastic) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Clock | 8-bit AVR, 8 MHz | 8-bit AVR, 8 MHz | 8-bit AVR, 8 MHz | 8-bit AVR, 16 MHz |
| Flash / EEPROM / SRAM | 64KB / 2KB / 4KB | 64KB / 2KB / 4KB | 64KB / 2KB / 4KB | 64KB / 2KB / 4KB |
| Radiation Tolerance | Yes (rad tolerant) | Yes (rad tolerant) | Yes (rad tolerant) | No |
| Space Qualification | MIL-PRF-38535 / AEQA0239, MIL-STD-883 | MIL-PRF-38535 / AEQA0239 (different flow) | MIL-PRF-38535 family (HP screening) | None (commercial/automotive grade) |
| Peripherals | CAN, UART, SPI, 10-bit ADC, 10-bit DAC, 12-bit PSC | Identical peripheral set | Identical peripheral set | Identical peripheral set |
| Primary Use Case | Flight software / space motor control | Flight software (alternate flow) | Flight software (alternate package option) | Industrial motor control / prototyping |
Key Differentiators
- Space qualification at rad-tolerant cost (vs ATMEGA64M1-AU)
- Ceramic 32-CQFP package (vs ATMEGA64M1-AU)
- Trade-off: lower clock than commercial part (vs ATMEGA64M1-AU)
Design Notes
Do not assume drop-in interchangeability between the 32-CQFP space package and the commercial ATmega64M1 TQFP-32 footprint. Although the die function and register map are identical, the ceramic CQFP lead geometry and pin-1 indexing differ from plastic TQFP, so flight PCBs must use the CQFP land pattern from the Microchip ATmegaS64M1 datasheet (DS60001506). Verify the exact screening suffix (KH-SV vs KH-MQ vs MA-HP) on the purchase order, since traceability and flow documentation differ per variant.
The ATmegaS64M1 is a 3.3V-class device; when porting designs from 5V ATmega boards, rescale ADC references, comparator thresholds, and any direct-drive outputs. Estimated: at 8 MHz the AVR core consumption is in the low-mA range typical of ATmega parts, which suits battery- and solar-limited spacecraft budgets, but always confirm the exact active, idle, and power-down currents against the characterization tables in the manufacturer datasheet rather than using commercial ATmega64M1 figures.
When driving motor power stages from the 12-bit PSC, route PSC outputs away from the 10-bit ADC input traces and provide a star-ground or solid ground plane to keep switching noise out of analog measurements. Use the integrated analog comparators for hardware overcurrent trips so protection latency does not depend on software execution time. On CAN lines, terminate per the bus standard used by the spacecraft harness and validate with the Microchip ATmegaS64M1 evaluation ecosystem built on the mature ATmega tools.
Compliance Information
ROHS3 Compliant per distributor full-electronic.com listing. Space quality grade per MIL-PRF-38535 and AEQA0239; MIL-STD-883-compliant qualification per Microchip datasheet. REACH, lead-free, halogen-free, and conflict-minerals declarations not found in provided data - request certificate of conformance.
