PIC16F1704-E/ML - 8-bit MCU, 7KB Flash, 32MHz, 16-QFN | Microchip
MPN: PIC16F1704-E/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.46 | $1.46 |
| 10 | $1.31 | $13.10 |
| 100 | $1.17 | $117.00 |
| 500 | $1.05 | $525.00 |
| 1,000 | $0.94 | $940.00 |
PIC16F1704-E/ML Overview
An 8-bit microcontroller (MCU) is a small, self-contained computing device built around an 8-bit data path, an ALU, on-chip program memory, RAM, and a rich set of peripherals. PIC microcontrollers from Microchip use a RISC-style modified Harvard architecture with Flash program memory and are widely adopted in embedded systems spanning consumer, industrial, and automotive applications. Within the broader taxonomy, PIC16F MCUs sit between smaller PIC10/PIC12 devices and larger PIC18/PIC24 families, offering a balance of footprint, cost, and peripheral integration.
Key features of the PIC16F1704-E/ML include eXtreme Low Power (XLP) technology for battery-friendly sleep currents, Peripheral Pin Select (PPS) for flexible signal routing, core-independent peripherals (CLC, COG, ZCD) that offload timing-critical tasks from the core, and a high-speed comparator with DAC reference. The combination of op amps, DAC, and 10-bit ADC makes the part a strong fit for sensor conditioning and closed-loop control applications. The 32 MHz internal oscillator provides 8 MIPS of computational throughput.
From an architecture perspective, the PIC16F1704 uses a 14-bit instruction word optimized for compiled C code density, with hardware stack and interrupt controller supporting prioritized events. The PPS module allows most digital peripherals to be remapped to multiple I/O pins, simplifying PCB layout. The 16-QFN package exposes a thermal pad, allowing dissipation of up to 800 mW in properly designed layouts.
Typical applications include LED lighting control (constant-current drivers using COG/PWM), TRIAC-based AC switching (using ZCD), battery-powered sensor nodes (leveraging XLP), fan and small motor control (with CCP/PWM + comparator), and consumer appliance user interfaces. For designers who need more memory or additional I/O, Microchip offers the PIC16F1705, PIC16F1708, and PIC16F1709 in compatible footprints.
Drop-in alternatives for PIC16F1704-E/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 PIC16F1704-E/ML (same form factor and footprint) — differing in ADC, Package, Comparators, Core Architecture, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1704-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1705-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1704-E/ST
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.02 / Unit
View Datasheet →PIC16F1509-I/ML
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →PIC16F1615-I/ML
✅ Drop-In✓ In Stock
$0.84 / Unit
View Datasheet →PIC16F15224-I/MG
✅ Drop-In✓ In Stock
$0.74 / Unit
View Datasheet →PIC16F1704-E/ML Maximum Ratings & Electrical Characteristics
| Product Family | PIC16F170X/171X |
| Core Architecture | PIC 8-bit (14-bit instruction word) |
| Program Memory (Flash) | 7 KB (4K x 14 words) |
| RAM | 512 bytes |
| Data EEPROM | 0 bytes |
| Maximum CPU Frequency | 32 MHz (8 MIPS) |
| ADC | 10-bit, up to 8 channels |
| DAC | 8-bit |
| Comparators | High-speed comparators with DAC reference |
| Op Amps | On-chip operational amplifiers |
| CCP/PWM Modules | Yes |
| Complementary Output Generator (COG) | Yes |
| Zero Cross Detect (ZCD) | Yes |
| Configurable Logic Cell (CLC) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| Communication | EUSART, I2C/SPI |
| Operating Temperature Range | -40C to +125C (E suffix) |
| Package | 16-QFN (4x4 mm) with exposed pad |
| Pin Count | 16 |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC16F1704-E/ML Pin Configuration
| Pin 1 | RA3/AN7/C1IN+/C2IN+/CLCIN1 — GPIO/Analog input/Comparator input/CLC input |
| Pin 2 | RA4/OPA1OUT/AN8/T0CKI — GPIO/Op amp 1 output/Analog input/Timer0 clock |
| Pin 3 | RA5/OPA1IN+/AN9 — GPIO/Op amp 1 non-inverting input/Analog input |
| Pin 4 | RA0/OPA1IN-/AN4/C1IN0- — GPIO/Op amp 1 inverting input/Analog input/Comparator 1 input |
| Pin 5 | RA1/OPA2IN-/C1IN0+/C2IN0-/AN5 — GPIO/Op amp 2 inverting input/Comparator inputs/Analog input |
| Pin 6 | RA2/OPA2OUT/AN6/DAC1OUT1 — GPIO/Op amp 2 output/Analog input/DAC1 output |
| Pin 7 | VDD — Positive supply voltage |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RC0/SOSCO/CLCIN0 — GPIO/SOSC oscillator output/CLC input |
| Pin 10 | RC1/SOSCI/CLCIN1 — GPIO/SOSC oscillator input/CLC input |
| Pin 11 | RC2/AN10/CCP1 — GPIO/Analog input/CCP1 PWM output |
| Pin 12 | RC3/AN11/CPP2/PPS — GPIO/Analog input/CCP2/PPS mapped |
| Pin 13 | RC4/AN12/PPS — GPIO/Analog input/PPS mapped |
| Pin 14 | RC5/AN13/PPS — GPIO/Analog input/PPS mapped |
| Pin 15 | RB4/SDA/SDI — GPIO/I2C data/SPI data in |
| Pin 16 | RB5/SCL/SCK — GPIO/I2C clock/SPI clock |
| Pin 17 | EP — Exposed thermal pad (must be soldered to PCB ground plane) |
Typical Applications
PIC16F1704-E/ML is suitable for 6 applications: LED Lighting Constant-Current Drivers, TRIAC-Based AC Dimmer Control, Battery-Powered Sensor Nodes (IoT), Small Fan and Pump Motor Control, Consumer Appliance User Interface, Industrial Sensor Signal Conditioning.
LED Lighting Constant-Current Drivers
The PIC16F1704-E/ML's on-chip op amps, 10-bit ADC, complementary output generator (COG), and configurable logic cell (CLC) make it a strong single-chip solution for constant-current LED drivers. The op amps can condition high-side current-sense signals from a shunt resistor, the ADC digitizes the feedback, and the COG generates complementary PWM outputs with programmable dead-band to drive high-side/low-side FETs in a synchronous buck topology. The CLC implements hardware fault shutoff within nanoseconds, independent of the core, ensuring LED protection under output short-circuit conditions. With 32 MHz / 8 MIPS throughput, the CPU can implement PID dimming loops or DALI/CCT communication stacks alongside the hardware-controlled power stage. The 16-QFN package with exposed pad supports efficient thermal dissipation for designs driving 1-5 A LED strings.
Recommended
TRIAC-Based AC Dimmer Control
The PIC16F1704-E/ML integrates Zero Cross Detect (ZCD) hardware that simplifies TRIAC-based AC dimming and synchronous switching control. The ZCD module directly senses AC mains zero-crossings through a current-limiting resistor and generates interrupts, allowing precisely timed TRIAC firing without external opto-couplers or zero-cross transformers in appropriate safety architectures. Per the Microchip PIC16F1704 product page, this feature reduces system cost and PCB area while improving EMI/EMC performance. The 10-bit ADC measures RMS line voltage for adaptive firing angle calculation, and the PWM modules generate the gate drive. The 8-bit DAC can provide programmable reference levels for leading-edge or trailing-edge dimming. Combined with XLP low-power technology, this enables compact wall-mounted dimmers and smart switches with sub-100 uW standby power.
Recommended
Battery-Powered Sensor Nodes (IoT)
The PIC16F1704-E/ML's XLP (eXtreme Low Power) technology makes it well-suited for battery-powered wireless sensor nodes. Sleep currents in the sub-1 uA range combined with on-chip op amps for sensor signal conditioning and a 10-bit ADC for measurement allow years of operation from a single coin cell. The CLC peripheral implements hardware event counting and threshold detection that wakes the core only when meaningful events occur, offloading routine wake/sleep decisions. The on-chip op amps can directly amplify thermocouple, photodiode, or Wheatstone-bridge signals, eliminating dedicated analog front-end ICs. With 7 KB Flash and 512 B RAM, the part can host lightweight sensor-fusion algorithms and BLE/Zigbee companion interfaces. The 16-QFN package suits space-constrained wearables and IoT endpoint designs.
Recommended
Small Fan and Pump Motor Control
The PIC16F1704-E/ML supports small BLDC, brushed-DC, and single-phase fan/pump motor control through its CCP/PWM modules, high-speed comparator, and 10-bit ADC. The high-speed comparator with DAC reference can implement sensorless BEMF zero-cross detection for low-cost BLDC designs, while the 32 MHz core handles PI speed loops and acceleration curves in real time. The on-chip op amps condition shunt-resistor current sense signals. The COG peripheral generates complementary PWM with programmable dead-band for safe half-bridge switching, a key requirement for motor drive efficiency and EMI. The 7 KB Flash is sufficient for lookup-table-based sinusoidal commutation. The -40C to +125C temperature range covers industrial fan, PC cooling, and appliance pump applications.
Recommended
Consumer Appliance User Interface
The PIC16F1704-E/ML fits consumer appliance user-interface (UI) designs, including washing-machine control panels, microwave keypads, and HVAC thermostats. The Configurable Logic Cell (CLC) implements hardware debouncing and state-machine logic that does not consume CPU cycles, freeing MIPS for backlight control, display driving, and capacitive-touch sensing. The Peripheral Pin Select (PPS) allows pin assignment flexibility, simplifying PCB layout for mixed signal-and-power boards. EUSART and I2C peripherals interface with LED drivers, segment displays, and Wi-Fi/BLE modules for connected appliances. The on-chip op amps and ADC support temperature, humidity, and pressure sensor inputs. The compact 16-QFN package suits sealed enclosures where PCB size is constrained.
Recommended
Industrial Sensor Signal Conditioning
The PIC16F1704-E/ML excels as a smart sensor signal-conditioning front end in industrial applications. Its on-chip op amps provide programmable gain and offset for thermocouple, RTD, strain-gauge, and 4-20 mA current-loop conditioning, while the 10-bit ADC digitizes the conditioned signal with selectable acquisition time. The CLC can implement hardware over/under-range detection independent of the CPU for safety-critical alarms. The PPS feature allows routing ADC inputs to specific op amp output pins, reducing PCB trace noise. The high-speed comparator can serve as a discrete threshold detector for fast fault signaling. With EUSART and I2C, the conditioned sensor data can be transmitted to a host PLC or industrial gateway. The -40C to +125C temperature range handles harsh industrial environments.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1704-E/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1704-I/ML | PIC16F1705-I/ML | PIC16F1509-I/ML | PIC16F1615-I/ML | PIC16F15224-I/MG |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 16-QFN (4x4 mm) | 16-QFN (4x4 mm) - same | 16-QFN (4x4 mm) - same | 16-QFN (4x4 mm) - same | 16-QFN (4x4 mm) - same | 16-QFN (4x4 mm) - same |
| Program Memory (Flash) | 7 KB | 7 KB - same | 14 KB | 14 KB | 14 KB | 7 KB |
| RAM | 512 bytes | 512 bytes - same | 1024 bytes | 512 bytes - same | 1024 bytes | 512 bytes - same |
| Maximum CPU Frequency | 32 MHz | 32 MHz - same | 32 MHz - same | 20 MHz | 32 MHz - same | 32 MHz - same |
| On-Chip Op Amps | Yes (2) | Yes (2) | Yes (2) | No | No | No |
| COG / CLC / ZCD Peripherals | All present | All present | All present | CLC only | CLC/ZCD only | CLC/ZCD only |
| Operating Temperature Range | -40C to +125C (E suffix) | -40C to +85C (I suffix) | -40C to +85C (I suffix) | -40C to +85C | -40C to +85C | -40C to +85C |
| Approx Unit Price (1000 pcs) | $0.94 | $0.94 | $1.05 | $1.10 | $1.20 | $1.00 |
Key Differentiators
- On-chip op amps and 8-bit DAC (vs PIC16F1509-I/ML)
- Comprehensive core-independent peripheral set (vs PIC16F1615-I/ML)
- Extended industrial temperature range (vs PIC16F1704-I/ML)
- Higher CPU throughput at same MIPS budget (vs PIC16F1509-I/ML)
Design Notes
The 16-QFN (4x4 mm) package exposes a thermal pad (pin 17/EP) that MUST be soldered to the PCB ground plane for mechanical reliability and thermal dissipation. Microchip recommends an array of thermal vias (typically 9-16 vias on 0.5 mm pitch) under the EP to a bottom-layer copper pour. Without proper EP soldering, thermal resistance theta_JA can exceed 100 C/W, drastically reducing allowable power dissipation. Estimated: with proper EP layout and 1 sq inch of copper, theta_JA falls below 40 C/W.
Place a 100 nF decoupling capacitor as close as possible to each VDD pin and a 10 uF bulk capacitor on the main supply rail. The PIC16F1704 datasheet recommends VDD rise time under a specified limit for proper Power-on Reset behavior; if your supply ramps too slowly, configure the BOR (Brown-out Reset) appropriately. For XLP battery applications, select the LFINTOSC during sleep to keep active current below 1 uA.
When migrating code from PIC16F1509 to PIC16F1704, verify that PPS register mapping is updated - PIC16F1704 uses a different PPS input/output mapping table than PIC16F1509. Also note that PIC16F1704 has no data EEPROM, so parameter storage must use Flash with wear-leveling or an external EEPROM. The on-chip op amps require configuration of the OPAxCON register before use; leaving them powered unnecessarily adds bias current.
Route the AC mains zero-cross detect (ZCD) input through a current-limiting resistor (typically 100 kohm) and place the resistor physically close to the MCU pin to minimize parasitic capacitance that can distort the zero-crossing waveform. For TRIAC drive circuits, place the snubber RC network (typically 100 ohm + 100 nF) directly at the TRIAC MT1/MT2 terminals. Keep high-current AC traces physically separated from low-level analog signal traces by at least 3 mm to prevent capacitive coupling of mains noise into ADC measurements.
Compliance Information
RoHS and lead-free compliance per Microchip product page. AEC-Q100 grade variants of the PIC16F1704 family may exist as separate order codes (e.g., PIC16F1704-E/MLVAO); the standard E/ML variant is industrial-grade, not automotive-qualified.