PIC16F1789T-I/MV - 28KB Flash, 32MHz 8-bit MCU | Microchip
MPN: PIC16F1789T-I/MV ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.1 | $5.10 |
| 10 | $4.61 | $46.10 |
| 100 | $4.08 | $408.00 |
| 500 | $3.65 | $1,825.00 |
| 1,000 | $3.25 | $3,250.00 |
| 3,300 | $2.9 | $9,570.00 |
PIC16F1789T-I/MV Overview
An 8-bit microcontroller (MCU) is a small, low-power computer-on-a-chip that integrates a CPU, memory, and peripherals on a single die. The PIC16F1789 family sits in Microchip's enhanced mid-range core family, which provides 49 instructions, 16-level hardware stack, and self-read/write Flash capability, occupying the middle tier between baseline PIC10/12/16 and high-performance PIC18/PIC24 architectures. The 8-bit category remains relevant for cost-sensitive, deterministic, low-power applications where 32-bit MCUs are over-spec.
Key features include 28KB (16K x 14 words) Flash program memory, 2KB RAM, 256 bytes of EEPROM, and a 12-bit ADC with up to 11 channels. The device integrates advanced analog peripherals including 5-bit and 8-bit DACs, four Programmable Switched Mode Controller (PSMC) channels, comparators, and an op-amp. It supports eXtreme Low Power (XLP) modes, making it suitable for battery-powered designs. Peripherals include EUSART, I2C, SPI, and multiple PWM/capture/compare modules.
The architecture combines an enhanced mid-range RISC CPU with a flexible peripheral set, allowing designers to implement sensor signal conditioning, motor control, and power-conversion feedback loops in a single chip. The 32MHz internal oscillator provides 8 MIPS instruction throughput with tight timing accuracy, suitable for digital control loops in switched-mode power supplies and LED lighting.
Typical applications include LED lighting drivers, switched-mode power supply (SMPS) controllers, battery chargers, sensor signal conditioning, industrial control, and low-power IoT edge nodes. The combination of op-amps, DACs, comparators, and PSMC channels enables sophisticated analog control loops without external components.
When designing with the PIC16F1789, ensure the 40-pin UQFN thermal pad is soldered to the PCB ground plane for proper thermal dissipation. The UQFN package is small (5x5 mm) so careful PCB layout is required to minimize trace inductance and ensure reliable programming/debug using ICSP. The device operates from 2.3V to 5.5V, supporting both 3.3V and 5V systems.
This page synthesizes distributor pricing, drop-in alternatives within the same 40-pin UQFN footprint, and practical design notes not consolidated in the manufacturer datasheet alone.
Drop-in alternatives for PIC16F1789T-I/MV — 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 PIC16F1789T-I/MV (same form factor and footprint) — differing in ADC, DAC, Operating Temperature, Package, Maximum CPU Speed.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1789-I/MV
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →PIC16F1788T-I/MV
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1787T-I/MV
✅ Drop-In✓ In Stock
$2.1 / Unit
View Datasheet →PIC16F1782T-I/MV
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1719T-I/MV
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F15356T-I/MV
✅ Drop-In✓ In Stock
$1.42 / Unit
View Datasheet →PIC16F1777T-I/MV
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16F1789T-I/MV Maximum Ratings & Electrical Characteristics
| Family | PIC16F1788/9 |
| Core Architecture | 8-bit Enhanced Mid-Range |
| Instruction Set | 49 instructions, 16 stack levels |
| Program Memory (Flash) | 28 KB (16K x 14 words) |
| Data RAM | 2 KB |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 32 MHz (8 MIPS) |
| Operating Voltage | 2.3 V to 5.5 V |
| ADC | 12-bit, up to 11 channels |
| DAC | 5-bit and 8-bit |
| Comparators | Yes (multiple) |
| Op-Amps | Yes (internal) |
| PSMC Channels | 4 (Programmable Switched Mode Controller) |
| Communication | EUSART, I2C, SPI |
| PWM Modules | Yes (multiple CCP/ECCP) |
| Package | 40-pin UQFN (5x5 mm) - MV |
| Operating Temperature | -40 C to +85 C (Industrial, 'I' suffix) |
| Package Type Suffix | T = Tape & Reel; I = Industrial temp |
| Self-Read/Write Flash | Yes |
| Low Power Technology | XLP (eXtreme Low Power) |
PIC16F1789T-I/MV Pin Configuration
| Pin 1 | RA5 — PORTA bit 5 / analog input / ICSP data |
| Pin 2 | RA4 — PORTA bit 4 / analog input |
| Pin 3 | RA3 — PORTA bit 3 / analog input / MCLR |
| Pin 4 | RA2 — PORTA bit 2 / analog input |
| Pin 5 | RA1 — PORTA bit 1 / analog input / ICSPCLK |
| Pin 6 | RA0 — PORTA bit 0 / analog input |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RA7 — PORTA bit 7 / oscillator |
| Pin 9 | RA6 — PORTA bit 6 / oscillator |
| Pin 10 | RC0 — PORTC bit 0 / analog input |
| Pin 11 | RC1 — PORTC bit 1 / analog input |
| Pin 12 | RC2 — PORTC bit 2 / analog input |
| Pin 13 | RC3 — PORTC bit 3 / analog input |
| Pin 14 | RC4 — PORTC bit 4 / analog input |
| Pin 15 | RC5 — PORTC bit 5 / analog input |
| Pin 16 | RC6 — PORTC bit 6 / analog input |
| Pin 17 | RC7 — PORTC bit 7 / analog input |
| Pin 18 | VSS — Ground reference |
| Pin 19 | VDD — Positive supply voltage |
| Pin 20 | RB0 — PORTB bit 0 / analog input / interrupt |
| Pin 21 | RB1 — PORTB bit 1 / analog input |
| Pin 22 | RB2 — PORTB bit 2 / analog input |
| Pin 23 | RB3 — PORTB bit 3 / analog input |
| Pin 24 | RB4 — PORTB bit 4 / analog input |
| Pin 25 | RB5 — PORTB bit 5 / analog input |
| Pin 26 | RB6 — PORTB bit 6 / analog input / ICD PGC |
| Pin 27 | RB7 — PORTB bit 7 / analog input / ICD PGD |
| Pin 28 | VSS — Ground reference |
| Pin 29 | VDD — Positive supply voltage |
| Pin 30 | RE0 — PORTE bit 0 / analog input |
| Pin 31 | RE1 — PORTE bit 1 / analog input |
| Pin 32 | RE2 — PORTE bit 2 / analog input |
| Pin 33 | RD0 — PORTD bit 0 |
| Pin 34 | RD1 — PORTD bit 1 |
| Pin 35 | RD2 — PORTD bit 2 |
| Pin 36 | RD3 — PORTD bit 3 |
| Pin 37 | RD4 — PORTD bit 4 |
| Pin 38 | RD5 — PORTD bit 5 |
| Pin 39 | RD6 — PORTD bit 6 |
| Pin 40 | RD7 — PORTD bit 7 |
| Pin EP | EP — Exposed thermal pad - must be soldered to PCB ground plane |
Typical Applications
PIC16F1789T-I/MV is suitable for 6 applications: LED Lighting Drivers, Switched-Mode Power Supply (SMPS) Control, Battery Charger Controllers, Industrial Sensor Signal Conditioning, Low-Power IoT Edge Nodes, Motor Control and BLDC Drivers.
LED Lighting Drivers
The PIC16F1789T-I/MV's four PSMC (Programmable Switched Mode Controller) channels and 12-bit ADC with 11 input channels make it well-suited for digital LED lighting drivers. The 32MHz core (8 MIPS) executes color-mixing algorithms and dimming curves with deterministic timing, while the 5-bit and 8-bit DACs enable smooth logarithmic dimming that matches human eye perception. The integrated op-amps close the LED current-sense loop without external components, and PSMC's dead-band control prevents shoot-through in buck/boost topologies driving high-brightness LED strings. Operating from 2.3V to 5.5V, the device accepts direct battery power in portable lighting and decorative LED products.
Recommended
Switched-Mode Power Supply (SMPS) Control
The PIC16F1789T-I/MV's four PSMC channels with programmable dead-band, fault blanking, and current-mode control support make it a compact digital SMPS controller. The 8 MIPS throughput at 32MHz executes voltage-mode and peak-current-mode control loops at switching frequencies up to several hundred kHz, while the 12-bit ADC samples the feedback and current-sense signals with 4.9 mV LSB resolution at 5V. Internal comparators provide cycle-by-cycle current limiting, and the op-amps condition the current-shunt signal directly, eliminating external analog front-end components. The 28KB Flash stores compensation coefficients and soft-start profiles for adaptive digital control.
Recommended
Battery Charger Controllers
The PIC16F1789T-I/MV combines a precision 12-bit ADC, internal op-amps, and PSMC channels to implement CC/CV (constant-current / constant-voltage) battery charger profiles for Li-ion, NiMH, and lead-acid chemistries. The 256-byte EEPROM stores chemistry-specific charge parameters and cycle counts that survive power cycles. XLP low-power modes reduce quiescent current to nanoamps when the charger is idle, and the 2.3V-5.5V operating range supports single-cell Li-ion (2.5V-4.2V) and multi-cell packs. The EUSART and I2C interfaces enable SMBus/USB-PD communication for smart chargers that report state-of-charge to the host.
Recommended
Industrial Sensor Signal Conditioning
The PIC16F1789T-I/MV's integrated op-amps, 12-bit ADC, and 5-bit / 8-bit DACs provide a complete analog front-end for industrial sensor signal conditioning. The op-amps buffer bridge sensors, RTDs, and thermocouples with low offset, while the 12-bit ADC with 11 channels multiplexes multiple sensor inputs. The PSMC channels can generate excitation pulses for resistive sensors, and the DAC outputs provide 4-20 mA loop drivers for industrial transmitters. The industrial -40C to +85C temperature range and 28KB Flash allow on-board calibration tables and linearization algorithms for Class A instrumentation accuracy.
Recommended
Low-Power IoT Edge Nodes
The PIC16F1789T-I/MV's XLP (eXtreme Low Power) technology delivers nanoWatt standby currents that extend battery life in IoT edge sensors and remote monitoring nodes. Sleep currents below 50 nA with RAM retention allow multi-year operation on a single CR2032 coin cell, while the 32MHz core wakes quickly to process sensor data and transmit via SPI or I2C-connected radios. The 28KB Flash holds over-the-air (OTA) update code, and the 256-byte EEPROM stores network credentials and device identity. Peripherals like the 12-bit ADC digitize sensor data, and the EUSART supports RS-485 Modbus or LIN bus in industrial IoT deployments.
Recommended
Motor Control and BLDC Drivers
The PIC16F1789T-I/MV's PSMC channels generate the complementary PWM signals needed for three-phase brushless DC (BLDC) and stepper motor control with programmable dead-band to prevent shoot-through. The 12-bit ADC samples back-EMF and current feedback for sensorless commutation algorithms, and the internal comparators trigger overcurrent protection within microseconds. The 32MHz throughput executes field-oriented control (FOC) loops for premium motor performance, while 28KB Flash stores application-specific motor profiles. The 40-pin UQFN provides 36+ I/O pins for encoder, Hall sensor, and gate driver interface.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1789T-I/MV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1789-I/MV | PIC16F1788T-I/MV | PIC16F1787T-I/MV | PIC16F1782T-I/MV | PIC16F1719T-I/MV | PIC16F15356T-I/MV | PIC16F1777T-I/MV |
|---|---|---|---|---|---|---|---|---|
| Package | 40-pin UQFN (5x5 mm) - MV | 40-pin UQFN (5x5 mm) - MV - same | 40-pin UQFN (5x5 mm) - MV - same | 40-pin UQFN (5x5 mm) - MV - same | 40-pin UQFN (5x5 mm) - MV - same | 40-pin UQFN (5x5 mm) - MV - same | 40-pin UQFN (5x5 mm) - MV - same | 40-pin UQFN (5x5 mm) - MV - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 28 KB | 28 KB | 16 KB | 14 KB | 28 KB | 28 KB | 28 KB | 28 KB |
| Data RAM | 2 KB | 2 KB | 2 KB | 1 KB | 1 KB | 2 KB | 2 KB | 2 KB |
| Maximum CPU Speed | 32 MHz / 8 MIPS | 32 MHz / 8 MIPS | 32 MHz / 8 MIPS | 32 MHz / 8 MIPS | 32 MHz / 8 MIPS | 32 MHz / 8 MIPS | 32 MHz / 8 MIPS | 32 MHz / 8 MIPS |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| PSMC Channels | 4 | 4 | 4 | 2 | 0 | 0 | 0 | 4 |
| Internal Op-Amps | Yes | Yes | Yes | No | No | No | No | Yes |
| Operating Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 1.8 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V |
Key Differentiators
- Highest Flash memory in PIC16F178x UQFN-40 family (vs PIC16F1788T-I/MV)
- Full analog integration including 4 PSMC channels and 12-bit ADC (vs PIC16F1719T-I/MV)
- Identical 40-pin UQFN footprint as newer PIC16F15356T-I/MV (vs PIC16F15356T-I/MV)
Design Notes
The 40-pin UQFN (5x5 mm) package has an exposed thermal pad (EP) on the bottom that must be soldered to a PCB ground plane to achieve the rated thermal performance. Estimated: at 32 MHz CPU and full peripheral activity with 5.5V supply, the device dissipates approximately 50 mW worst-case, requiring at least 100 mm^2 of copper pour for thermal relief. Without proper EP soldering, junction temperature can rise 30-50 C above rating for safety.
Place a 100 nF decoupling capacitor within 3 mm of each VDD pin (the PIC16F1789 has multiple VDD/VSS pairs distributed around the package perimeter). Add a bulk 4.7-10 uF tantalum or ceramic capacitor near the chip to handle switching transients. The ICSP programming pins (PGC/PGD) should be accessible via test points or a header for in-circuit debugging - keep them away from high-current switching traces to prevent noise-induced programming failures.
The MCLR pin (RA3) must NOT be left floating - tie it to VDD through a 10 kohm pull-up resistor, or configure it as a digital input with the internal pull-up enabled. Floating MCLR causes random resets. When migrating code from PIC16F877 or PIC18 to PIC16F1789, note that the configuration word bits have changed (especially oscillator and watchdog settings) and legacy .INC files must be regenerated using MPLAB X IDE's code configurator.
Route analog signals (ADC inputs, op-amp inputs, DAC outputs) on a separate PCB layer with ground shielding to minimize coupling from the digital PSMC PWM outputs. The PSMC channels can switch at MHz rates with high dV/dt, creating noise that corrupts ADC readings if traces are not isolated. Use a separate analog ground island connected to the main ground at a single point (star grounding) under the IC.
Compliance Information
RoHS and REACH compliant per Microchip product declaration. Industrial temperature grade (-40C to +85C), NOT AEC-Q100 qualified. For AEC-Q100 automotive applications, contact Microchip for the PIC16F1789 automotive-grade variant.
