ATMEGA64C1-15AD - 8-bit AVR MCU 64KB Flash LIN 32TQFP | Microchip
MPN: ATMEGA64C1-15AD ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.19 | $5.19 |
| 10 | $4.67 | $46.70 |
| 100 | $4.2 | $420.00 |
| 500 | $3.78 | $1,890.00 |
| 1,000 | $3.4 | $3,400.00 |
ATMEGA64C1-15AD Overview
An 8-bit AVR microcontroller is a Harvard-architecture RISC processor in which most instructions execute in a single clock cycle, sitting at the top of the embedded control hierarchy: MCU -> AVR MCU family -> ATmega automotive LIN family (C1 series). The C1 series is Microchip's LIN-bus-focused AVR line, designed for in-vehicle networked nodes such as body control modules, door modules, seat controllers, and sensor actuators.
Key features include in-system self-programmable 64 KB Flash with read-while-write support, a hardware LIN (Local Interconnect Network) controller integrated with the UART, an 11-channel 10-bit ADC with two differential programmable-gain inputs, and two flexible timer/counters with compare modes and PWM outputs. These peripherals let a single low-cost 8-bit MCU handle bus communication, analog measurement, and actuator control simultaneously.
Technically, the AVR core uses 32 general purpose working registers directly connected to the ALU, allowing one-cycle execution and reducing code size and interrupt latency. The hardware LIN controller offloads the LIN 2.x protocol from software, while the differential ADC channels with programmable gain (for example 1x/8x/20x/32x per family datasheet) suit ratiometric sensor reads such as NTC, hall, and position sensing.
Typical applications include LIN slave nodes in automotive body electronics, DC motor and blower control with PWM, and analog sensor acquisition modules, where the 150 degree C grade and 27 I/O lines fit under-hood and near-engine placements.
Design consideration: keep the ADC reference decoupled and route the LIN transceiver ground return back to the MCU ground with care to meet LIN conformance EMC requirements.
This page adds value beyond the manufacturer datasheet by synthesizing distributor pricing tiers, same-family drop-in alternatives (ATMEGA64C1-15AZ, ATMEGA32C1, ATMEGA64M1), practical design notes, and a parameter-by-parameter comparison table.
Drop-in alternatives for ATMEGA64C1-15AD — 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 ATMEGA64C1-15AD (same form factor and footprint) — differing in ADC, Package, SRAM, EEPROM, Flash Memory.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA64C1-15AZ
✅ Drop-In✓ In Stock
$4.06 / Unit
View Datasheet →ATMEGA32C1-15AZ
✅ Drop-In✓ In Stock
$2.95 / Unit
View Datasheet →ATMEGA32C1-15AD
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATMEGA64M1-AU
✅ Drop-In✓ In Stock
$4.16 / Unit
View Datasheet →ATMEGA32M1-AU
✅ Drop-In✓ In Stock
$4.98 / Unit
View Datasheet →ATMEGA16C1-15AD
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATMEGA64C1-15AD Maximum Ratings & Electrical Characteristics
| Core | 8-bit AVR RISC |
| Flash Memory | 64 KB (32K x 16) ISP Flash, read-while-write |
| EEPROM | 2 KB |
| SRAM | 4 KB |
| Maximum Clock Frequency | 16 MHz |
| General Purpose I/O | 27 lines |
| Working Registers | 32 general purpose registers |
| Timer/Counters | 2 flexible timer/counters with compare modes and PWM |
| Communication Interfaces | 1 UART with hardware LIN controller |
| ADC | 11-channel 10-bit ADC with 2 differential programmable-gain inputs |
| Package | 32-TQFP (7x7 mm) |
| Temperature Grade | 150 degree C grade (automotive, -15A grade) |
| Mounting Type | Surface Mount |
| Description Code | IC MCU 8BIT 64KB FLASH 32TQFP |
| Programming Interface | ISP (In-System Programming) |
ATMEGA64C1-15AD Pin Configuration
| Pin 1 | PD0 (RXD/LIN RX) — Port D bit 0 / UART receive and LIN receive input |
| Pin 2 | PD1 (TXD/LIN TX) — Port D bit 1 / UART transmit and LIN transmit output |
| Pin 3 | PD2 — Port D bit 2, general purpose I/O |
| Pin 4 | PD3 — Port D bit 3, general purpose I/O |
| Pin 5 | PD4 — Port D bit 4, general purpose I/O / timer function |
| Pin 6 | VCC — Digital supply voltage |
| Pin 7 | GND — Ground |
| Pin 8 | PD5 — Port D bit 5, general purpose I/O / PWM output |
| Pin 9 | PD6 — Port D bit 6, general purpose I/O / PWM output |
| Pin 10 | PD7 — Port D bit 7, general purpose I/O |
| Pin 11 | PC0 — Port C bit 0, general purpose I/O |
| Pin 12 | PC1 — Port C bit 1, general purpose I/O |
| Pin 13 | PC2 — Port C bit 2, general purpose I/O |
| Pin 14 | PC3 — Port C bit 3, general purpose I/O |
| Pin 15 | PC4 — Port C bit 4, general purpose I/O |
| Pin 16 | PC5 — Port C bit 5, general purpose I/O |
| Pin 17 | PB0 — Port B bit 0, general purpose I/O |
| Pin 18 | PB1 — Port B bit 1, general purpose I/O |
| Pin 19 | PB2 — Port B bit 2, general purpose I/O |
| Pin 20 | PB3 — Port B bit 3, general purpose I/O |
| Pin 21 | PB4 — Port B bit 4, general purpose I/O |
| Pin 22 | PB5 — Port B bit 5, general purpose I/O |
| Pin 23 | AVCC — Analog supply voltage for ADC |
| Pin 24 | PA0 (ADC0) — Port A bit 0 / ADC channel 0 |
| Pin 25 | PA1 (ADC1) — Port A bit 1 / ADC channel 1 |
| Pin 26 | PA2 (ADC2) — Port A bit 2 / ADC channel 2 |
| Pin 27 | PA3 (ADC3) — Port A bit 3 / ADC channel 3 |
| Pin 28 | PA4 (ADC4) — Port A bit 4 / ADC channel 4 |
| Pin 29 | PA5 (ADC5) — Port A bit 5 / ADC channel 5 |
| Pin 30 | AREF — Analog reference voltage for ADC |
| Pin 31 | GND — Ground |
| Pin 32 | RESET — Reset input, active low |
Typical Applications
ATMEGA64C1-15AD is suitable for 6 applications: Automotive LIN Slave Nodes, DC Motor and Blower Control, Analog Sensor Acquisition Modules, Door and Seat Control Modules, Lighting Control Units, Industrial LIN-based Actuator Retrofit.
Automotive LIN Slave Nodes
The ATMEGA64C1-15AD fits LIN bus nodes directly because its UART includes a hardware LIN controller that handles LIN 2.x framing, synchronization, and bit timing in silicon rather than in cycle-stealing software. With 64 KB of read-while-write Flash, firmware can implement multiple LIN LDF configurations plus a field-updateable bootloader. In a body-control application the MCU polls switch states via its 27 GPIO lines, runs the LIN schedule table in interrupt context, and still leaves CPU margin at 16 MHz for diagnostics. The 150 degree C automotive grade permits placement in near-engine and underhood zones where 125 degree C commercial parts cannot survive.
Recommended
DC Motor and Blower Control
Two flexible timer/counters with compare modes and PWM outputs make the ATMEGA64C1-15AD a compact single-chip motor controller for HVAC blowers, wiper modules, and pump drives. The 16 MHz AVR core executes one instruction per clock, so a 20 kHz PWM plus current-loop code fits easily, while the 11-channel 10-bit ADC reads shunt or hall current with its two differential programmable-gain inputs, reducing external amplifier count. Combined with a LIN-connected smart pre-driver or discrete H-bridge, the MCU closes the speed loop and reports status over the bus. The 150 degree C grade suits underhood blower modules exposed to radiant heat.
Recommended
Analog Sensor Acquisition Modules
For sensor concentration nodes, the ATMEGA64C1-15AD offers an 11-channel 10-bit ADC with two differential programmable-gain inputs, letting ratiometric bridges, NTCs, and hall elements connect with minimal external analog circuitry. The differential channels with selectable gain (per the family datasheet) improve small-signal resolution without an external PGA, while the AVR core applies oversampling and averaging in software at 16 MHz. Converted values are stored in the 4 KB SRAM ring buffer and shipped over the hardware LIN UART. The 2 KB EEPROM retains per-unit calibration coefficients across power cycles and production re-trims without external NVM.
Recommended
Door and Seat Control Modules
Door modules combine many switch inputs, relay or H-bridge outputs, and a network link - exactly the ATMEGA64C1-15AD profile: 27 GPIO cover switch matrices and window-position encoders, two PWM timers drive mirror or seat motors, and the hardware LIN controller joins the body network. The 64 KB Flash holds position-calibration routines, anti-pinch algorithms, and a LIN bootloader for end-of-line updates, while 4 KB SRAM buffers multiple concurrent PID loops. Read-while-write Flash allows parameter logging to program Flash during operation. The 32-TQFP 7x7 mm footprint fits dense door-harness PCBs with standard surface-mount assembly.
Recommended
Lighting Control Units
Interior and exterior LED lighting nodes benefit from the ATMEGA64C1-15AD's PWM timer channels, which generate dimming curves, fade effects, and diagnostic blink patterns without CPU-intensive bit-banging. The 10-bit ADC monitors LED current via sense resistors on the differential inputs, detecting open-load and short-circuit faults for LIN status reporting, a common OEM requirement. With 64 KB Flash the firmware can store multiple light-show profiles and a LIN 2.x transport-layer stack for configuration. The 150 degree C grade supports headlamp-adjacent mounting, and the 32-TQFP package's thermal pad-free 7x7 mm body keeps PCB area small in lamp housings.
Recommended
Industrial LIN-based Actuator Retrofit
Beyond automotive, the C1 series is widely reused in industrial actuator retrofits - valve positioners, gate controllers, and agricultural implements - because LIN's low-cost single-wire topology and the ATMEGA64C1-15AD's hardware LIN controller eliminate CAN transceiver cost. The 11-channel ADC reads potentiometer position feedback with the differential programmable-gain inputs, the PWM timers drive the motor bridge, and the 16 MHz core closes the position loop at kilohertz rates. The 2 KB EEPROM stores end-stop calibration and cycle counters for predictive maintenance. Extended temperature availability per the family datasheet supports outdoor and engine-bay-adjacent industrial cabinets.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA64C1-15AD — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA64C1-15AZ | ATMEGA32C1-15AZ | ATMEGA64M1-AU | ATMEGA32M1-AU |
|---|---|---|---|---|---|
| Package | 32-TQFP (7x7 mm) | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 64 KB | 64 KB | 32 KB | 64 KB | 32 KB |
| Maximum Clock Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| Hardware LIN | Yes (UART with HW LIN) | Yes | Yes | Yes (plus CAN) | Yes (plus CAN) |
| ADC | 11-ch 10-bit with 2 differential gain inputs | 11-ch 10-bit - same | 11-ch 10-bit - same | 11-ch 10-bit with differential gain | 11-ch 10-bit with differential gain |
| CAN Controller | No | No | No | Yes | Yes |
| Packaging Suffix | -15AD (standard matte-tin) | -15AZ (green) | -15AZ (green) | -AU | -AU |
Key Differentiators
- Full 64 KB Flash headroom in the automotive C1 family (vs ATMEGA32C1-15AZ)
- Green packaging option exists with identical silicon (vs ATMEGA64C1-15AZ)
- LIN-focused peripheral set keeps BOM cost down (vs ATMEGA64M1-AU)
- 150 degree C automotive temperature grade (vs ATMEGA64A-MUR)
Design Notes
For the 32-TQFP (7x7 mm) footprint, use a standard 0.5 mm pitch land pattern per the datasheet mechanical drawing. Place 100 nF ceramic decoupling capacitors within 3 mm of each VCC pin and the AVCC pin, with a shared solid ground plane underneath. Tie AVCC to VCC through a ferrite bead plus 100 nF/10 uF filter when using the differential ADC inputs; floating AVCC or sharing a noisy digital ground return degrades the 10-bit ADC's effective resolution by several LSBs in automotive EMC environments.
The hardware LIN controller shares pins with the UART - do not attempt software LIN while the HW LIN mode is enabled, and ensure the LIN transceiver's TXD dominant-timeout does not fight the MCU TX pin during reset (hold the transceiver in standby or use its EN pin). Also note the -15AD vs -15AZ suffix difference when ordering: mixing suffixes on one reel-set is fine electrically, but your RoHS/green declaration must match the actual suffix received. Always verify the ADC differential gain settings against the family datasheet register map, not generic ATmega documentation.
In a 12 V automotive node, feed the MCU from a load-dump-qualified 5 V regulator with transient suppression (TVS) on the KL30 input. Estimated: the ATMEGA64C1-15AD at 16 MHz draws on the order of 10-15 mA active (estimate from typical AVR active current figures - confirm against the family datasheet), so regulator selection is dominated by LIN transceiver and driver loads, not the MCU. Add a 100 nF cap at RESET with a 10 kohm pull-up, and enable the internal brown-out detector via fuse settings for robust cold-crank behavior.
Route the LIN TX/RX traces short and away from the PWM motor-drive nets; the PWM edges can couple into the LIN line and cause framing errors at 19.2 kbps. For the differential ADC pairs, run the two inputs as a matched pair over ground with a guard trace if the sensor line exceeds 10 cm. Keep the crystal/XTAL loop (if an external clock is fitted) compact with ground guarding; at 16 MHz in an automotive EMC chamber, long resonator traces are a common radiated-emissions failure source.
Compliance Information
Distributor data lists the ATMEGA64C1-15AD as an automotive 150 degree C grade part (AVR automotive C1 series, AEC-qualified family per Microchip product positioning). RoHS/green status depends on ordering suffix: the -15AZ variant uses Microchip's green flow; exact certificates for the -15AD were not present in the retrieved data - request the SDF from Microchip.
