PIC16CR74T-I/ML - 8-Bit PIC MCU, 7KB ROM, 44-VQFN | Microchip
MPN: PIC16CR74T-I/ML ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.4 | $164.00 |
| 100 | $14.2 | $1,420.00 |
| 500 | $12.05 | $6,025.00 |
| 1,000 | $10.75 | $10,750.00 |
PIC16CR74T-I/ML Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and peripheral interfaces on one die. The PIC family follows a RISC (Reduced Instruction Computer) architecture with a Harvard memory layout, where program and data memory use separate buses for predictable, deterministic instruction timing. PIC microcontrollers occupy the broader hierarchy of microcontroller -> embedded controller -> semiconductor IC, and the PIC16C sub-family in particular is positioned for general-purpose 8-bit embedded control with rich I/O and analog integration.
Key features include 7 KB on-chip ROM for firmware storage, 192 bytes of data RAM, 33 I/O lines supporting digital and analog functions, an integrated analog-to-digital converter, and operation up to 20 MHz from a wide 2.0 V to 6.0 V supply. The VQFN-44 (ML) 8×8 mm package with an exposed pad enables a low thermal resistance path and a compact PCB footprint suitable for space-constrained designs. The 'R' suffix in PIC16CR74 denotes a ROM-based device, while 'T' indicates tape-and-reel packaging and 'I' denotes the industrial temperature grade.
Technically, the device uses a 14-bit instruction word with a 35-instruction set, single-cycle instruction execution except for program branches, and an 8-level deep hardware stack. Peripherals include Capture/Compare/PWM (CCP) modules, a synchronous serial port (SSP) configurable for SPI or I²C, a USART, and an 8-channel 8-bit ADC, providing a complete control platform for embedded designs.
Typical applications include industrial control systems, automotive body electronics, sensor signal acquisition, motor control interfaces, and home appliance control boards. The wide operating voltage range and industrial-grade temperature tolerance make it well suited to harsh electrical environments.
When designing with this part, ensure the ROM-programmed variant matches your firmware - ROM parts cannot be reprogrammed in-circuit, so the code must be factory-masked. For field-upgradable designs, choose the Flash-based PIC16F74 equivalent in the same package.
Drop-in alternatives for PIC16CR74T-I/ML — 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 PIC16CR74T-I/ML (same form factor and footprint) — differing in I/O Pins, In-Circuit Programming, Operating Temperature, Package, Program Memory Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F74-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F74T-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C74B-20I/PT
✅ Drop-In✓ In Stock
$4.62 / Unit
View Datasheet →PIC16CR73T-I/ML
✅ Drop-In✓ In Stock
$2.89 / Unit
View Datasheet →PIC16F724-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CR74T-I/ML Maximum Ratings & Electrical Characteristics
| Series | PIC® 16C |
| Core Processor | PIC |
| Core Size | 8-Bit |
| Program Memory Size | 7 KB (4K × 14) |
| Program Memory Type | ROM |
| RAM Size | 192 B |
| Number of I/O Pins | 33 |
| Oscillator Type | External |
| Clock Frequency | 20 MHz |
| Supply Voltage Range | 2.0 V to 6.0 V |
| Operating Temperature | -40 °C to +85 °C |
| Package Type | 44-VQFN Exposed Pad (ML) |
| Mounting Type | Surface Mount |
| ADC Resolution | 8-bit, 8 channels |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Peripherals | Brown-out Detect, CCP, POR, PWM, WDT |
| Connectivity | I²C, SPI, UART/USART |
PIC16CR74T-I/ML 44-vqfn exposed pad (ml) Pin Configuration Guide
Pin configuration for PIC16CR74T-I/ML (44-vqfn exposed pad (ml) 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 PIC16CR74T-I/ML.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC16CR74T-I/ML is suitable for 6 applications: Industrial Process Automation, Automotive Body Electronics, Home Appliance Control, Sensor Signal Acquisition, Motor Control Interfaces, Smart Home Hub Devices.
Industrial Process Automation
The PIC16CR74T-I/ML fits industrial automation because its 7 KB ROM, 192 B RAM, 33 I/O, and integrated ADC provide deterministic control for sensor conditioning and actuator drive. Its 20 MHz clock supports fast loop times for PID-style regulators, and its 2.0 V to 6.0 V supply handles industrial 24 V rails when paired with a pre-regulator. The 44-VQFN package fits space-constrained DIN-rail control boards and its industrial temperature grade (-40 °C to +85 °C) tolerates factory-floor thermal stress. Pairs well with the MCP23S17 I/O expander for higher pin-count needs.
Recommended
Automotive Body Electronics
The PIC16CR74T-I/ML serves automotive body modules such as lighting controllers, seat controllers, and HVAC interfaces. The 33 I/O pins drive relays, MOSFET gates, and LED arrays directly, while the 8-channel ADC reads sensor inputs for temperature, position, and current feedback. The wide 2.0-6.0 V supply range tolerates load-dump transients when filtered externally, and the industrial temperature range covers most cabin environments. For under-hood AEC-Q100 work, however, designers should migrate to the AEC-Q100 qualified PIC16F88K20 family in the same VQFN footprint.
Recommended
Home Appliance Control
The PIC16CR74T-I/ML is widely used in washing machines, dishwashers, refrigerators, and microwave oven control boards. Its 7 KB ROM accommodates appliance firmware comfortably, while the 33 I/O drive keypads, displays (via 7-segment multiplex), triac interfaces, and motor direction relays. The integrated CCP/PWM modules control brushless DC or universal motors, and the ADC reads thermistor inputs for closed-loop temperature control. Cost-sensitive high-volume appliances benefit from the ROM-masked pricing model where firmware is fixed and verified.
Recommended
Sensor Signal Acquisition
The PIC16CR74T-I/ML suits multi-channel data acquisition systems where 8 analog inputs must be read, filtered, and processed locally. The 8-channel 8-bit ADC supports thermistor arrays, photocells, potentiometers, and 4-20 mA loop sensors when scaled with external amplifiers. With 20 MHz clock and deterministic instruction timing, the firmware can implement moving-average filters and linearization tables in real time. The serial USART/SPI/I²C ports stream data to a host controller, and the 44-VQFN small footprint enables compact sensor hubs. Pairs naturally with external op-amps such as MCP6002 for high-impedance buffering.
Recommended
Motor Control Interfaces
The PIC16CR74T-I/ML controls stepper motors, DC brushed motors, and small BLDC fans via PWM outputs from its CCP modules. Its 20 MHz instruction rate supports commutation loops for sensorless or Hall-sensor BLDC drives at low RPM, and its 33 I/O interface with opto-isolated H-bridge drivers for high-voltage systems. The 8-channel ADC reads back EMF, current, and position feedback for closed-loop regulation, and the on-chip PWM units handle soft-start and synchronous rectification timing. The 44-VQFN footprint suits BLDC fan controller PCBs where board area is limited.
Recommended
Smart Home Hub Devices
The PIC16CR74T-I/ML fits smart-home edge nodes such as wall switches, dimmers, and HVAC thermostats that require reliable fixed-function control with minimal firmware maintenance. Its 33 I/O drive triac dimmers, character LCDs, capacitive touch via the analog channels, and serial links to wireless modules. The 2.0-6.0 V supply works directly from rectified mains after regulation, and the integrated ADC reads temperature, humidity, and light sensors. The ROM-based firmware model suits large-volume shipping devices where the code is finalized. Pair with a sub-GHz or BLE transceiver for wireless connectivity.
Recommended
Recommended Products Summary
Engineering reference data for PIC16CR74T-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F74-I/ML | PIC16F74T-I/ML | PIC16C74B-20I/PT | PIC16CR73T-I/ML | PIC16F724-I/ML |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-VQFN (ML) | 44-VQFN (ML) - same | 44-VQFN (ML) - same | 44-TQFP (PT) - same pin family | 44-VQFN (ML) - same | 44-VQFN (ML) - same |
| Program Memory Type | ROM (mask) | Flash | Flash | EPROM (windowed) | ROM (mask) | Flash |
| Program Memory Size | 7 KB (4K × 14) | 7 KB | 7 KB | 7 KB | 7 KB | 7 KB |
| RAM Size | 192 B | 192 B | 192 B | 192 B | 192 B | 192 B |
| Number of I/O Pins | 33 | 33 | 33 | 33 | 28 | 36 |
| Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Supply Voltage Range | 2.0 V to 6.0 V | 2.0 V to 6.0 V | 2.0 V to 6.0 V | 2.0 V to 6.0 V | 2.0 V to 6.0 V | 1.8 V to 5.5 V |
| Lifecycle Status | NRND | Active | Active | NRND / EOL | NRND | Active |
Key Differentiators
- Factory-masked ROM for very low per-unit cost at high volume (vs PIC16F74-I/ML)
- Industrial temperature grade included (vs Generic PIC16C commercial-grade parts)
- 44-VQFN compact package with 33 I/O (vs PIC16CR73T-I/ML (28 I/O))
Design Notes
The PIC16CR74T-I/ML requires a clean 2.0 V to 6.0 V supply; place a 100 nF decoupling capacitor as close as possible to VDD pins and a bulk 10 µF tantalum or ceramic at the regulator output. For battery-powered designs, account for brown-out reset thresholds and configure the BOR voltage in configuration bits to avoid spurious resets during discharge.
Estimated: the VQFN-44 (ML) exposed pad is the primary thermal dissipation path. Solder the EP to a continuous ground copper pour with thermal vias to inner ground planes to keep junction temperature below +85 °C. At maximum 20 MHz operation and typical 5 V supply, the device dissipates roughly 100 mW internally, which the EP handles comfortably if properly soldered.
For the 44-pin VQFN (ML) 8×8 mm package with 0.5 mm pitch, follow IPC-7351 land pattern guidelines. Use a 4-layer PCB where possible to provide adjacent ground and power planes that reduce EMI and provide controlled impedance for the SPI/I²C lines. Keep oscillator traces short and surround the crystal with a ground guard ring for noise immunity.
PIC16CR74 is a ROM-based device - firmware is factory-masked into the device and cannot be erased or reprogrammed in-circuit. Confirm the firmware is fully validated before placing a production mask order; ROM tooling fees and lead times are substantial. If you need field updates, use the Flash-based PIC16F74 in the same 44-VQFN package instead.
When using the USART, SPI, or I²C peripherals at the upper 20 MHz instruction rate, configure the GPIO pins as digital inputs (set TRIS, ADCON1, and CMCON appropriately) to disable analog functions that could otherwise load the digital signals. Use series resistors on USART lines for long cable connections, and ensure the I²C bus has proper pull-ups (typically 4.7 kΩ at 400 kHz).
Compliance Information
RoHS and lead-free per Microchip product page; not AEC-Q100 qualified (industrial grade only); halogen-free status not stated in available data.
