PIC16F785T-I/SO - 8-Bit MCU, 20MHz, 3.5KB Flash, 18 I/O | Microchip
부품 번호: PIC16F785T-I/SO ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.21 | $22.10 |
| 100 | $1.95 | $195.00 |
| 500 | $1.74 | $870.00 |
| 1,000 | $1.56 | $1,560.00 |
| 2,500 | $1.41 | $3,525.00 |
PIC16F785T-I/SO 개요
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and a rich set of peripherals (timers, ADC, communication, analog) onto one silicon die. The PIC16F785 sits in Microchip's PIC16 mid-range hierarchy, between the baseline PIC10/12/16 families and the high-performance PIC18/dsPIC families, and is widely deployed in cost-sensitive embedded control applications. The 'x14' instruction set provides 35 single-word instructions, balancing code density with deterministic real-time control.
The PIC16F785's most distinctive feature is its integrated analog subsystem: two on-chip operational amplifiers and two high-speed comparators, plus a two-phase asynchronous feedback PWM module (often called the dual-output PWM with feedback). This analog integration allows closed-loop switch-mode power conversion, LED drivers, and analog signal conditioning without external op-amps, shrinking BOM cost and PCB area. A 10-bit ADC with multiple channels further extends the device's analog reach for sensor interfacing.
Additional features include nanoWatt Technology for low-power sleep modes, an internal 31 kHz oscillator, an 8 MHz factory-calibrated HFINTOSC, in-circuit serial programming (ICSP), and an on-chip debug interface. The wide 2.0 V to 5.5 V VDD range supports both 3.3 V and 5 V system designs, and the industrial-grade -40 C to +85 C operating range covers commercial and industrial environments.
Typical applications include primary-side regulated AC/DC converters, LED lighting drivers with analog dimming, battery chargers, sensor signal conditioning, and small motor control loops. The integrated op-amps and comparators make it especially attractive in topologies that previously required a discrete analog front end alongside a controller.
When designing with this part, plan analog component placement carefully because the on-chip op-amps share package pins with general-purpose I/O. Use the AC/DC application note from Microchip as a starting reference for primary-side regulation topologies, and verify headroom for the internal references against the chosen VDD.
This page synthesizes distributor pricing from LCSC, DigiKey, and Mouser, drop-in alternative pin-compatible variants of the same die, and practical design notes not collected in the manufacturer datasheet alone, giving procurement and engineering a single authoritative source.
드롭인 대체품: PIC16F785T-I/SO — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: PIC16F785T-I/SO (동일 폼 팩터 및 풋프린트) — 차이점: ADC, Low-Power Mode, Operating Temperature, PWM Modules, Package.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
PIC16F785-I/SO
✅ 드롭인✓ 재고 있음
$1.45 / 개
데이터시트 보기 →PIC16F785-E/SO
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
PIC16F785T-I/SO 최대 정격 & 전기적 특성
| Core Architecture | PIC16 mid-range (x14) |
| Program Memory (Flash) | 3.5 KB |
| Data EEPROM | 256 bytes |
| Data SRAM | 128 bytes |
| Maximum CPU Speed | 20 MHz (200 ns instruction cycle) |
| Operating Voltage (VDD) | 2.0 V to 5.5 V |
| I/O Pins | 18 |
| 동작 온도 | -40 C to +85 C (Industrial) |
| On-Chip Operational Amplifiers | 2 |
| On-Chip Comparators | 2 (high-speed) |
| ADC | 10-bit, multi-channel |
| PWM Modules | Two-phase asynchronous feedback PWM |
| Internal Oscillators | 31 kHz LFINTOSC, 8 MHz HFINTOSC (factory calibrated) |
| Low-Power Mode | nanoWatt Technology |
| 패키지 | SOIC-20 (SO-20, 7.50 mm body, MS-013, 1.27 mm pitch) |
| 실장 유형 | Surface Mount |
| Programming/Debug | ICSP, in-circuit debug |
| RoHS 상태 | Compliant |
PIC16F785T-I/SO 핀 구성
| 핀 1 | RA0/AN0/ULPWU — PORTA bit 0 / ADC channel 0 / ultra-low-power wake-up |
| 핀 2 | RA1/AN1 — PORTA bit 1 / ADC channel 1 |
| 핀 3 | RA2/AN2/VREF- — PORTA bit 2 / ADC channel 2 / negative voltage reference |
| 핀 4 | RA3/AN3/VREF+ — PORTA bit 3 / ADC channel 3 / positive voltage reference |
| 핀 5 | RA4/AN4/T0CKI — PORTA bit 4 / ADC channel 4 / Timer0 clock input |
| 핀 6 | RA5/AN5/SS/HLVDIN — PORTA bit 5 / ADC channel 5 / slave select / high-low voltage detect input |
| 핀 7 | VSS — Ground reference |
| 핀 8 | OSC1/RA7 — Crystal oscillator input / alternate PORTA bit 7 |
| 핀 9 | OSC2/RA6 — Crystal oscillator output / alternate PORTA bit 6 |
| 핀 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| 핀 11 | RC1/T1OSI — PORTC bit 1 / Timer1 oscillator input |
| 핀 12 | RC2/P1A/CCP1 — PORTC bit 2 / PWM output 1A / Capture/Compare/PWM 1 |
| 핀 13 | RC3/P1B — PORTC bit 3 / PWM output 1B |
| 핀 14 | RC4/P1C — PORTC bit 4 / PWM output 1C |
| 핀 15 | RC5/P1D — PORTC bit 5 / PWM output 1D |
| 핀 16 | RC6 — PORTC bit 6 |
| 핀 17 | RC7 — PORTC bit 7 |
| 핀 18 | VSS — Ground reference (second VSS pin for PIC16F785 specific layout) |
| 핀 19 | VDD — Positive supply voltage |
| 핀 20 | VDD — Positive supply voltage (second VDD pin) |
일반적인 애플리케이션
PIC16F785T-I/SO 적합 용도: 6 애플리케이션s: Primary-Side Regulated AC/DC Converter, LED Lighting Driver with Analog Dimming, Battery Charger Controller, Sensor Signal Conditioning Front End, Small DC Motor Control (Brushed), Industrial Process Control Module.
Primary-Side Regulated AC/DC Converter
The PIC16F785T-I/SO is purpose-built for primary-side regulation (PSR) in isolated AC/DC adapters up to approximately 10 W. Its two on-chip operational amplifiers handle current-sense amplification and opto-coupler feedback compensation, while the two high-speed comparators detect the auxiliary winding voltage for primary-side voltage sensing without a TL431. The two-phase asynchronous feedback PWM module drives the MOSFET at the precise switching edges required for quasi-resonant valley switching, achieving efficiencies above 80 percent at low line. With 3.5 KB Flash and nanoWatt standby modes, the controller can implement full digital CV/CC control loops and meet ENERGY STAR no-load standby of less than 100 mW.
추천
LED Lighting Driver with Analog Dimming
In analog-dimming LED drivers, the PIC16F785T-I/SO's two integrated op-amps form the current-sense and reference-error amplifiers, while the comparators provide fast over-current protection within one switching cycle. The two-phase PWM output drives a single high-side or low-side switch at frequencies up to about 200 kHz with 10-bit duty-cycle resolution, enabling smooth 0.1 percent analog dimming down to very low currents. The 18 I/O lines handle multiple LED channels, button inputs, and a 0-10 V or PWM dim interface. Operating from 2.0 V to 5.5 V with the internal 8 MHz oscillator eliminates external clock components, reducing BOM cost in commercial downlight and bulb-retrofit designs.
추천
Battery Charger Controller
The PIC16F785T-I/SO delivers a flexible charging platform for NiMH, Li-ion, and lead-acid chemistries in chargers up to about 2 A. The 10-bit ADC monitors battery voltage and current, while the on-chip op-amps condition the sense-resistor signal for the charge termination algorithm. The two comparators detect over-voltage and over-current conditions directly, bypassing the ADC latency for hardware protection. nanoWatt Technology allows standby current under 100 nA during shelf storage, preserving battery charge. With 256 bytes of EEPROM, charging profiles and calibration constants can be stored without external memory, keeping the design compact.
추천
Sensor Signal Conditioning Front End
For bridge sensors, thermocouples, and RTD signal chains, the PIC16F785T-I/SO's on-chip op-amps implement low-side and high-side amplification stages without external instrumentation amplifiers. The dual comparators generate threshold interrupts to the CPU, allowing event-driven wake-up from sleep and reducing average power consumption in battery-powered sensor nodes. The 18 I/O handle multiple sensor inputs, while the 10-bit ADC digitizes the conditioned signal with reference stability across the full 2.0-5.5 V supply range. Industrial temperature grade (-40 to +85 C) and on-chip EEPROM for calibration constants make the part a strong fit for transducer conditioning modules.
추천
Small DC Motor Control (Brushed)
Brushed DC motor control in toys, small appliances, and automotive accessory motors benefits from the PIC16F785T-I/SO's analog integration. The op-amps implement current sensing and back-EMF amplification, while the comparators handle zero-cross detection for PWM synchronous rectification, reducing switching losses. The two-phase asynchronous feedback PWM delivers complementary outputs for H-bridge drive with programmable dead-band insertion, protecting the FETs against cross-conduction. The CPU runs the speed control loop at up to 5 MIPS, sufficient for PI control of motors up to several hundred watts with low acoustic signature.
추천
Industrial Process Control Module
In 4-20 mA loop-powered transmitters and process control modules, the PIC16F785T-I/SO operates reliably across the 2.0-5.5 V supply range and provides the analog and digital resources needed for sensor linearization, range calibration, and HART-style modulation. The op-amps condition the loop current, while the comparators detect loop-fault conditions (open, short, out-of-range) and wake the CPU from sleep for diagnostic logging. 256 bytes of EEPROM store calibration coefficients, and nanoWatt Technology keeps sleep current low enough for compliance with NAMUR NE43 and IEC 61000 surge standards when paired with appropriate TVS protection. Industrial temperature rating supports deployment in field enclosures.
추천
추천 제품 요약
엔지니어링 참조 데이터: PIC16F785T-I/SO — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | PIC16F785-I/SO | PIC16F785-E/SO |
|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-20 (SO-20, 7.50 mm) | SOIC-20 (SO-20, 7.50 mm) - same | SOIC-20 (SO-20, 7.50 mm) - same |
| Program Memory | 3.5 KB Flash | 3.5 KB Flash | 3.5 KB Flash |
| Data EEPROM | 256 bytes | 256 bytes | 256 bytes |
| Data SRAM | 128 bytes | 128 bytes | 128 bytes |
| Maximum CPU Clock | 20 MHz | 20 MHz | 20 MHz |
| I/O Pins | 18 | 18 | 18 |
| On-chip Op-Amps / Comparators | 2 / 2 | 2 / 2 | 2 / 2 |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) |
주요 차별점
- Tube vs Tape-and-Reel format for SMT assembly (vs PIC16F785-I/SO)
- Industrial temperature grade at lowest cost (vs PIC16F785-E/SO)
- On-chip op-amps eliminate external analog ICs (vs PIC16F883 / PIC16F886)
설계 노트
Do not assume both VDD pins (19 and 20) are interchangeable if you are laying out a two-layer board. The PIC16F785 has internal bonding that may favor one VDD pin for the analog supply and the other for the digital logic. Tie both VDD pins together at the package entry with a star connection, and place a 100 nF decoupling cap within 3 mm of each VDD pin and a 10 uF bulk cap near the part. The internal op-amps are particularly sensitive to supply noise; if you see oscillation on the op-amp outputs, add a 10-100 ohm resistor in series with the VDD trace close to the analog pin.
The PIC16F785T-I/SO is rated for industrial temperature -40 C to +85 C; if your design operates continuously near the upper end, derate CPU activity and verify that the internal HFINTOSC drift stays within timing budgets. The SOIC-20 package has a theta_JA in still air of approximately 70-80 C/W (estimate; refer to the Microchip package thermal model for board-specific values). For closed-enclosure designs, drop to 4 MHz CPU clock or use the LFINTOSC sleep modes to control self-heating, since the on-chip op-amps contribute quiescent current that compounds thermal load.
The on-chip operational amplifiers are uncommitted and may be configured as inverting, non-inverting, or comparator-style stages. Always place a feedback capacitor in parallel with the feedback resistor to limit the closed-loop bandwidth and prevent RF pickup from causing the op-amp to self-oscillate. Estimated: a 47 kohm feedback resistor with a 22 pF capacitor rolls off the gain at approximately 150 kHz, which is well above any 50/60 Hz control loop but suppresses switcher noise coupling. Verify with the AC electrical characteristics table in the datasheet.
Use nanoWatt Technology's sleep modes aggressively when designing battery-powered applications. The PIC16F785T-I/SO's sleep current is below 1 uA typical at 3 V (per datasheet), but only if all peripherals are disabled before entering sleep. In particular, switch off the on-chip op-amps and comparators via the CMxCON and OPAxCON registers; otherwise they may remain biased and draw tens of microamps, ruining your no-load budget. Wake-up from sleep is fastest when using the WDT or external interrupt rather than a HFINTOSC wake, since the oscillator needs a few microseconds to stabilize.
규정 준수 정보
RoHS and lead-free per Microchip product page and SoIC-20 package declaration. Not AEC-Q100 qualified; for automotive choose PIC16F785-E/SO with extended temperature grade or PIC16F785T-I/SO paired with an external automotive-grade supervisor.
