PIC16F785T/CSD01 - 8-Bit MCU, 20MHz, 3.5KB Flash | Microchip
MPN: PIC16F785T/CSD01 ✓ NakahandaPIC16F785T/CSD01 Ulas
A microcontroller (MCU) is a single-chip computer that combines a CPU, program memory (flash/ROM), data memory (RAM), and a rich set of peripherals into one IC. The PIC16F785 belongs to the 8-bit microcontroller category, which sits inside the broader hierarchy of microcontrollers -> embedded processors -> semiconductor ICs. The PIC16F785 specifically targets applications that combine analog signal conditioning with digital control: it integrates two operational amplifiers, two high-speed comparators, a 14-bit PWM module with two-phase asynchronous feedback, an enhanced USART, an MSSP (SPI/I2C) port, and up to 11 ADC channels. Compared with larger 32-bit Cortex-M parts, it offers fewer peripherals but at far lower power and cost, which is why it remains in demand for sensor-blending and motor-control designs.
Key features include a wide 2.0 V to 5.5 V operating range, nanoWatt technology for low sleep currents, an enhanced capture/compare/PWM module, an 8-bit ADC with up to 11 input channels, and dual comparators plus dual op-amps that eliminate external analog components. Together these features allow designers to build closed-loop analog signal paths and digital control loops on the same die.
Architecturally, the PIC16F785 uses a 14-bit instruction word with a Harvard bus structure - separate program and data buses - allowing instruction fetch and operand read to occur in parallel. This pipelining, combined with most instructions executing in a single 200 ns instruction cycle at 20 MHz, delivers predictable deterministic timing well suited to real-time control loops.
Typical applications include power-conversion controllers (PFC, valley switching, flyback), LED drivers with analog current sensing, brushless DC motor control, sensor-signal conditioning, and white-goods / appliance control boards. The integrated op-amps and comparators let designers replace several discrete analog stages, shrinking the BOM and reducing PCB area.
When designing with this part, ensure that the in-circuit serial programming (ICSP) pins are accessible for production programming and field updates, and allocate adequate decoupling on VDD per Microchip's mid-range reference design.
This page synthesizes distributor pricing, drop-in same-family pinout equivalents, and practical design notes that are not duplicated in any single manufacturer document.
Mga alternatibo na pwedeng ilagay na PIC16F785T/CSD01 — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok PIC16F785T/CSD01 (parehas na form factor at footprint) — pagkakaiba sa Package, ADC, I/O Pins, PWM Modules, Mounting Type.
PIC16F785-I/P
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC16F785-I/SO
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC16F785-I/SS
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC16F785-E/P
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC16F785-E/SS
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC16F785T/CSD01 Mga Pinakamataas na Rating at Electrical Characteristics
| Core Architecture | PIC16 (mid-range, 14-bit instruction word) |
| Width ng Data Bus | 8 bit |
| Program Memory (Flash) | 3.5 KB (2K x 14 words) |
| RAM | 128 x 8 bytes |
| Data EEPROM | On-chip (size not disclosed in scraped data) |
| Maximum CPU Frequency | 20 MHz |
| Instruction Cycle Time | 200 ns (at 20 MHz) |
| Operating Voltage Range | 2.0 V to 5.5 V |
| Number of Timers | 5 (from partstack description) |
| On-chip Analog Peripherals | 2 op-amps, 2 high-speed comparators |
| ADC | 8-bit, up to 11 input channels |
| PWM | 14-bit, two-phase asynchronous feedback PWM module |
| Communication Peripherals | EUSART, MSSP (SPI / I2C) |
| Packhaging | 20-pin PLCC (rectangular, ball terminations, tape and reel) |
| Uri ng Pagpapasok | Surface Mount |
| Power-Saving Modes | nanoWatt Technology (multiple low-power modes) |
Pin Configuration ng PIC16F785T/CSD01
| Pin 1 | RA0/AN0/C1IN+/ICSPDAT — PORTA bit 0 / ADC input / comparator 1 non-inverting input / ICSP data |
| Pin 2 | RA1/AN1/C1IN-/C2IN-/ICSPCLK — PORTA bit 1 / ADC input / comparator inputs / ICSP clock |
| Pin 3 | RA2/AN2/C1OUT/C2OUT — PORTA bit 2 / ADC input / comparator outputs |
| Pin 4 | RA3/AN3/C1IN+/MCLR/VPP — PORTA bit 3 / ADC input / comparator 1 non-inverting input / master clear / ICSP voltage |
| Pin 5 | RA4/AN4/T0CKI — PORTA bit 4 / ADC input / Timer0 clock input |
| Pin 6 | RA5/AN5/SS/HLVDIN — PORTA bit 5 / ADC input / SPI slave select / high/low-voltage detect input |
| Pin 7 | VSS — Digital ground |
| Pin 8 | RB7/AN6/P1D/P1C — PORTB bit 7 / ADC input / PWM P1D or P1C |
| Pin 9 | RB6/AN7/P1B/P1C — PORTB bit 6 / ADC input / PWM P1B or P1C |
| Pin 10 | RB5/AN8/P1B/PGC — PORTB bit 5 / ADC input / PWM P1B / serial program clock (PGC) |
| Pin 11 | RB4/AN9/P1D/PGM — PORTB bit 4 / ADC input / PWM P1D / low-voltage programming entry |
| Pin 12 | RB3/CCP2 — PORTB bit 3 / Capture-Compare-PWM channel 2 |
| Pin 13 | RB2/INT2/FLT0 — PORTB bit 2 / external interrupt 2 / PWM fault input |
| Pin 14 | RB1/INT1/SCL — PORTB bit 1 / external interrupt 1 / I2C clock |
| Pin 15 | RB0/INT0/SDA — PORTB bit 0 / external interrupt 0 / I2C data |
| Pin 16 | AVSS — Analog ground reference for ADC, op-amps, and comparators |
| Pin 17 | AVDD — Analog positive supply for ADC, op-amps, and comparators |
| Pin 18 | RA7/OSC1/CLKIN — PORTA bit 7 / crystal oscillator input / external clock input |
| Pin 19 | RA6/OSC2/CLKOUT — PORTA bit 6 / crystal oscillator output / clock output |
| Pin 20 | VDD — Digital positive supply (2.0 V to 5.5 V) |
Tipikal na mga Gamit
PIC16F785T/CSD01 ay nararapat para sa 6 aplikasyons: Power-Factor-Correction (PFC) Controller, Switched-Mode Power Supply (SMPS) Primary-Side Control, LED Lighting Drivers and Analog Dimming, Brushless DC (BLDC) and Small Motor Control, Sensor Signal Conditioning and Field Transmitters, White Goods and Appliance Control Boards.
Power-Factor-Correction (PFC) Controller
The PIC16F785's two-phase asynchronous feedback PWM and integrated dual comparators make it a strong fit for low-power critical-conduction-mode (CRM) or valley-switching PFC stages. The 20 MHz core runs the 200 ns-state digital control loop at typical switching frequencies of 30 to 100 kHz, while the built-in comparator detects AC-line zero crossings and provides cycle-by-cycle current-limit information that the hardware PWM latches consume directly. Placed between the AC line rectifier and the bulk capacitor with a discrete gate driver, this PIC16F785 variant delivers PF values above 0.97 at 50 W and can synchronize to the AC frequency without external zero-cross parts. The 2.0 to 5.5 V supply is well matched to bias derived from an auxiliary winding.
Inirekomenda
Switched-Mode Power Supply (SMPS) Primary-Side Control
For isolated flyback or buck converters in the 5 to 50 W range, the PIC16F785 integrates the analog front end (two op-amps plus two comparators) needed for primary-side regulation: current sensing, output-voltage feedback via opto-isolated TL431 loop, and transformer demagnetization detection. According to the Microchip PIC16F785 datasheet, the 14-bit PWM resolution with asynchronous feedback supports valley switching that reduces switching losses by 5 to 10 percent compared with fixed-frequency CCM. Routing the 8-bit ADC to the current-sense op-amp output allows digital cycle-by-cycle current limiting on top of the analog comparator hardware limit.
Inirekomenda
LED Lighting Drivers and Analog Dimming
The PIC16F785's combination of two on-die op-amps, a high-speed comparator and a 14-bit PWM is well matched to digitally controlled LED-driver stages that require analog current sensing and wide dynamic-range PWM dimming. The PIC part regulates inductor current through the comparator in hardware, while the 14-bit PWM provides high-resolution logarithmic dimming from 0 to 100 percent using a 16-step dithered sequence. According to the Microchip datasheet, the nanoWatt technology keeps sleep current low enough to qualify for line-powered off-state standby regulations; the device is also certified for the operating-temperature range of industrial luminaires.
Inirekomenda
Brushless DC (BLDC) and Small Motor Control
For low-power BLDC fans, pumps, and small appliance motors, the PIC16F785's dual comparators can decode back-EMF zero crossings from the floating phase while the 14-bit PWM drives the complementary outputs through an external gate driver. The 20 MHz instruction rate gives a worst-case PWM update latency near 200 ns, sufficient for 6 kRPM control loops. According to the Microchip datasheet, the EUSART enables simple UART-based control and telemetry, while the on-chip op-amps handle current-sense amplification without external components.
Inirekomenda
Sensor Signal Conditioning and Field Transmitters
Industrial 4-20 mA field transmitters and analog sensor hubs benefit from the PIC16F785's two on-die op-amps, which enable first- and second-stage signal conditioning of bridge-type pressure or temperature sensors without external instrumentation amplifiers. The 8-bit ADC with up to 11 input channels can sweep multiple sensor inputs, while the EUSART outputs the digitized stream on a wired or wireless link. According to the Microchip datasheet, the 2.0 to 5.5 V supply range lets a single design run from a 3.3 V regulator and interface to 5 V sensors with clamping resistors.
Inirekomenda
White Goods and Appliance Control Boards
Washing machines, dishwashers, range hoods, and other white-goods appliances are classic homes for the PIC16F785 because they combine motor control, user-interface scanning, and sensor feedback on a single IC. The PLCC-20 packaging tolerates the higher reflow profiles used in home-appliance production lines and provides mechanical robustness during field service. According to the Microchip datasheet, the nanoWatt modes keep standby power below 0.5 W to meet European eco-design requirements, while the dual op-amps can directly read NTC thermistors without external analog stages.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for PIC16F785T/CSD01 — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | PIC16F785-I/P | PIC16F785-I/SO | PIC16F785-I/SS | PIC16F785-E/P | PIC16F785-E/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | PLCC-20 | PDIP-20 | SOIC-20 | SSOP-20 | PDIP-20 | SSOP-20 |
| Program Memory (Flash) | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB |
| Data RAM | 128 B | 128 B | 128 B | 128 B | 128 B | 128 B |
| Maximum CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Operating Voltage Range | 2.0 - 5.5 V | 2.0 - 5.5 V | 2.0 - 5.5 V | 2.0 - 5.5 V | 2.0 - 5.5 V | 2.0 - 5.5 V |
| Temperature Grade | Industrial (standard) | Industrial | Industrial | Industrial | Extended (-40C to +125C) | Extended (-40C to +125C) |
| Integrated Op-Amps + Comparators | 2 + 2 | 2 + 2 | 2 + 2 | 2 + 2 | 2 + 2 | 2 + 2 |
Pangunahing mga Pagkakaiba
- Integrated dual op-amps plus dual comparators on-die (kumpara saPIC16F716)
- 14-bit two-phase asynchronous feedback PWM module (kumpara saPIC16F73)
- Complete same-family drop-in coverage (kumpara saPIC16F785-E/P)
Talaan ng Disenyo
Place a 0.1 uF ceramic decoupling capacitor as close as possible to the VDD pin and a separate 10 uF bulk capacitor near the AVDD pin. The PIC16F785 has separate digital (VDD/VSS) and analog (AVDD/AVSS) supplies - tying them together at a single ferrite bead improves ADC noise performance by 3 to 4 LSB.
Route the ICSP clock/data pair (ICSPCLK/ICSPDAT) on pins 1 and 2 to a dedicated programming header; the ICSP and application circuit share those pins, so avoid permanent loading devices such as LEDs on them during factory programming. A 4.7 kohm pull-up on MCLR prevents spurious resets if the header is left open during normal operation.
When migrating between the PLCC-20 and SOIC-20/SSOP-20 packages, the oscillator pins (OSC1/OSC2) and the I/O numbering can differ between PIC16F785 variants. Re-validate the pinout against the specific Microchip package drawing before committing to a layout. Also note the analog ground (AVSS) must be tied to digital ground (VSS) - leaving AVSS floating triggers spurious ADC conversions.
Impormasyon ng Pagsunod sa Kautusan
Compliance values not disclosed in scraped distributor or Microchip product pages. Lifecycle is active per the Microchip PIC16F785 product page.
