PIC16C774T/PQ - 8-Bit OTP MCU, 20MHz, 7KB, 12-bit ADC | Microchip
MPN： PIC16C774T/PQ ✗ 停產PIC16C774T/PQ 概覽
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/Flash/OTP), data RAM, I/O peripherals, and timers into one package. PIC microcontrollers use a RISC-style Harvard architecture with separate program and data buses, allowing instruction fetch and operand access in a single cycle. The PIC16C family belongs to Microchip's mid-range 8-bit line, positioned between the baseline PIC10/12/16 families and the high-performance PIC18 family, making it suitable for control-oriented embedded designs.
Key features of the PIC16C774 include 200ns instruction cycle time at 20MHz, only 35 single-word instructions for compact code development, 8-level deep hardware stack, in-circuit serial programming (ICSP) capability through the T suffix tape-and-reel variant, and a wide operating voltage range of 2.5V to 5.5V. The 10-channel 12-bit ADC provides 4096-step resolution suitable for precision sensor acquisition.
The architecture employs a 14-bit wide instruction word with 8-bit data path, separate program and data memory buses (Harvard architecture), and an ALU that operates on any working register in a single instruction cycle. OTP program memory is one-time programmable but enables low-cost, fast-turn prototyping; production runs typically migrate to the pin-compatible PIC16F874 (Flash) variant. Brown-out reset, watchdog timer with on-chip RC oscillator, and power-on reset are integrated.
Typical applications include industrial process control, sensor signal conditioning, motor control front-ends, consumer white goods, instrumentation, and battery-powered embedded systems. The 12-bit ADC is particularly valuable when interfacing analog sensors (temperature, pressure, strain-gauge bridges) to digital control loops.
When designing with the PIC16C774, consider that OTP memory cannot be reprogrammed; plan firmware revisions using a Flash equivalent (PIC16F874) for prototyping, then transition to the OTP part for cost-optimized production. The 44-pin MQFP package requires careful PCB layout because the 0.8mm lead pitch is finer than through-hole packages but coarser than QFN, allowing both hand-soldering and automated assembly.
This page synthesizes distributor availability, drop-in pin-compatible alternatives, and practical design considerations not found in the bare manufacturer datasheet.
直接替換替代品，適用於 PIC16C774T/PQ — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC16C774T/PQ （相同外形與佔位） — 差異在於 Package, ADC, Operating Temperature, RAM Size, Timers.
PIC16C774T-E/PQ
✅ 直接替換聯絡詢價
查看資料表 →PIC16C774T-I/PQ
✅ 直接替換聯絡詢價
查看資料表 →PIC16C774-I/PQ
✅ 直接替換聯絡詢價
查看資料表 →PIC16F874-I/PQ
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16F877A-I/PQ
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16C77-10/PQ
✅ 直接替換聯絡詢價
查看資料表 →PIC16C774T/PQ 最大額定值與電氣特性
| Product Type | 8-bit Microcontroller (MCU) |
| Architecture | PIC16C, RISC Harvard |
| Program Memory | 7 KB (4K x 14) OTP |
| Data RAM | 256 bytes |
| EEPROM | None (OTP only) |
| 最大時脈頻率 | 20 MHz |
| Instruction Cycle Time | 200 ns |
| Instruction Set Size | 35 single-word instructions |
| Supply Voltage Range | 2.5 V to 5.5 V |
| I/O Pins | 33 |
| ADC | 10-channel, 12-bit |
| Timers | 3 modules |
| Interrupt Sources | 14 |
| 封裝 | 44-pin MQFP (PQ, 10x10 mm) |
| 工作溫度 | 0 C to +70 C (commercial) |
| 安裝類型 | Surface Mount |
| Lead Pitch | 0.8 mm |
PIC16C774T/PQ 腳位配置
| 腳位 1 | OSC1/CLKIN — Oscillator input / external clock |
| 腳位 2 | OSC2/CLKOUT — Oscillator output / clock out |
| 腳位 3 | MCLR/VPP — Master clear reset / programming voltage |
| 腳位 4 | RA0/AN0 — PORTA bit 0 / ADC channel 0 |
| 腳位 5 | RA1/AN1 — PORTA bit 1 / ADC channel 1 |
| 腳位 6 | RA2/AN2 — PORTA bit 2 / ADC channel 2 |
| 腳位 7 | RA3/AN3/VREF — PORTA bit 3 / ADC channel 3 / ADC VREF |
| 腳位 8 | RA4/AN4/T0CKI — PORTA bit 4 / ADC channel 4 / Timer0 clock |
| 腳位 9 | RA5/AN5/SS — PORTA bit 5 / ADC channel 5 / SPI slave select |
| 腳位 10 | VSS — Ground |
| 腳位 11 | VDD — Positive supply |
| 腳位 12 | RB0/INT — PORTB bit 0 / external interrupt |
| 腳位 13 | RB1 — PORTB bit 1 |
| 腳位 14 | RB2 — PORTB bit 2 |
| 腳位 15 | RB3/PGM — PORTB bit 3 / LVP programming |
| 腳位 16 | RB4 — PORTB bit 4 |
| 腳位 17 | RB5 — PORTB bit 5 |
| 腳位 18 | RB6/PGC — PORTB bit 6 / ICSP clock |
| 腳位 19 | RB7/PGD — PORTB bit 7 / ICSP data |
| 腳位 20 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 osc out / Timer1 clock |
| 腳位 21 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 osc in / CCP2 |
| 腳位 22 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| 腳位 23 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| 腳位 24 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| 腳位 25 | RC5/SDO — PORTC bit 5 / SPI data out |
| 腳位 26 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| 腳位 27 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| 腳位 28 | RE0/RD/AN5 — PORTE bit 0 / read control / ADC5 |
| 腳位 29 | RE1/WR/AN6 — PORTE bit 1 / write control / ADC6 |
| 腳位 30 | RE2/CS/AN7 — PORTE bit 2 / chip select / ADC7 |
| 腳位 31 | VDD — Positive supply |
| 腳位 32 | VSS — Ground |
| 腳位 33 | RD0/PSP0 — PORTD bit 0 / parallel slave port |
| 腳位 34 | RD1/PSP1 — PORTD bit 1 / parallel slave port |
| 腳位 35 | RD2/PSP2 — PORTD bit 2 / parallel slave port |
| 腳位 36 | RD3/PSP3 — PORTD bit 3 / parallel slave port |
| 腳位 37 | RD4/PSP4 — PORTD bit 4 / parallel slave port |
| 腳位 38 | RD5/PSP5 — PORTD bit 5 / parallel slave port |
| 腳位 39 | RD6/PSP6 — PORTD bit 6 / parallel slave port |
| 腳位 40 | RD7/PSP7 — PORTD bit 7 / parallel slave port |
| 腳位 41 | AVSS — Analog ground |
| 腳位 42 | AVDD — Analog supply |
| 腳位 43 | AN8 — ADC channel 8 |
| 腳位 44 | AN9 — ADC channel 9 |
典型應用
PIC16C774T/PQ 適用於 6 應用s: Industrial Process Control, Sensor Signal Conditioning, Consumer White Goods Control, Battery-Powered Instrumentation, Motor Control Front-End, Test and Measurement Handhelds.
Industrial Process Control
The PIC16C774T/PQ suits industrial process control loops where the 10-channel 12-bit ADC acquires analog signals from temperature, pressure, and flow sensors at 4096-step resolution (2.44 mV per LSB at 10 V full-scale). Its 20 MHz CPU executes PID control loops in 200 ns per instruction, enabling fast loop closure for valve and heater actuators. The 33 GPIO drive indicator lamps, relays, and HMI displays; three timer modules generate PWM for proportional control. The 0-70 C operating range covers factory-floor enclosures. Source: Microchip PIC16C774 datasheet and PIC16C77 family application notes.
推薦
Sensor Signal Conditioning
The PIC16C774T/PQ integrates analog-to-digital conversion directly, reducing bill-of-materials cost in multi-sensor designs. Each of the 10 ADC channels samples at up to 50 ksps aggregate, suitable for thermistor bridges, strain gauges, and 4-20 mA current-loop receivers when paired with an external op-amp. The 14-bit instruction word plus hardware multiplier support floating-point math via libraries, enabling linearization of non-linear sensors such as NTC thermistors and RTDs. The 2.5-5.5 V supply tolerates battery and 5 V regulated rails. Source: Microchip AN546 PIC16C6X/7X ADC application note.
推薦
Consumer White Goods Control
Consumer appliances such as washing machines, dishwashers, and microwave ovens use the PIC16C774T/PQ for cost-sensitive control with on-chip ADC eliminating external A/D chips. The 35-instruction RISC set and 7 KB OTP fit typical appliance firmware (motor sequencing, user interface, sensor monitoring) at under USD 10 BoM cost. The 33 GPIO drive seven-segment displays, keypads, and triac-based heater/valve actuators. The MQFP-44 package handles IR-reflow assembly on double-sided consumer PCBs. Source: Microchip PIC16C7X family appliance reference designs.
推薦
Battery-Powered Instrumentation
The PIC16C774T/PQ supports battery-powered instrumentation through its wide 2.5-5.5 V supply range, accepting two or three alkaline cells, a single Li-ion cell, or regulated 3.3 V rails. Sleep current with the ADC off is in the microamp range per Microchip PIC16C7X datasheets, enabling months of standby operation on a single battery. The 12-bit ADC quantizes battery voltage and sensor outputs for state-of-health monitoring. The 256-byte RAM accommodates calibration tables and measurement buffers without external memory. Source: Microchip PIC16C774 datasheet DC characteristics section.
推薦
Motor Control Front-End
The PIC16C774T/PQ operates as a motor control front-end using its three timer modules to generate PWM signals for H-bridge drivers and BLDC commutation logic. The 10-channel ADC samples motor current via shunt resistors and back-EMF from the stator windings, implementing sensorless or Hall-sensor commutation at the 200 ns instruction rate. Brown-out reset and watchdog timer with on-chip RC oscillator protect against motor-induced supply transients. The 33 GPIO connect to direction, brake, and fault inputs. Source: Microchip AN857 brushless DC motor control reference design.
推薦
Test and Measurement Handhelds
Handheld test equipment uses the PIC16C774T/PQ for its integrated 12-bit ADC, 33 GPIO, and modest power consumption in a compact MQFP-44 footprint. Multimeters, cable testers, and insulation testers benefit from the 10-channel ADC scanning multiple measurement points while the 20 MHz CPU computes RMS, peak, and crest-factor math in real time. The 35 single-word instructions ease hand-coded assembly for fast interrupt response on over-current and over-voltage events. Source: Microchip PIC16C7X low-power design notes.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16C774T/PQ — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC16C774T-E/PQ | PIC16C774T-I/PQ | PIC16C774-I/PQ | PIC16F874-I/PQ | PIC16F877A-I/PQ | PIC16C77-10/PQ |
|---|---|---|---|---|---|---|---|
| Package | 44-MQFP (PQ), 10x10 mm | 44-MQFP (PQ), 10x10 mm | 44-MQFP (PQ), 10x10 mm | 44-MQFP (PQ), 10x10 mm | 44-MQFP (PQ), 10x10 mm | 44-MQFP (PQ), 10x10 mm | 44-MQFP (PQ), 10x10 mm |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 4 KB Flash | 14 KB Flash | 8 KB OTP |
| Maximum Clock | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 10 MHz |
| ADC Resolution / Channels | 12-bit / 10-ch | 12-bit / 10-ch | 12-bit / 10-ch | 12-bit / 10-ch | 10-bit / 8-ch | 10-bit / 8-ch | 12-bit / 10-ch |
| Data RAM | 256 B | 256 B | 256 B | 256 B | 192 B | 368 B | 256 B |
| Operating Temperature | 0 C to +70 C (commercial) | -40 C to +125 C (extended) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | 0 C to +70 C (commercial) |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 | 33 |
| Lifecycle Status | NRND | NRND | NRND | NRND | Active | Active | NRND |
主要差異化特點
- Wide commercial-to-extended temperature offering (對比PIC16C774T-I/PQ)
- Drop-in Flash upgrade available (對比PIC16F874-I/PQ)
- 10-channel 12-bit ADC vs 8-channel 10-bit on Flash siblings (對比PIC16F874-I/PQ)
設計說明
PIC16C774 OTP memory cannot be erased or rewritten once programmed. Engineers should prototype with the pin-compatible PIC16F874-I/PQ Flash variant and migrate to PIC16C774 only when firmware is locked. Failure to do so risks scrapping boards when a bug is discovered. Brown-out reset (BOR) must be enabled in the configuration word for reliable operation; with BOR disabled, supply glitches below 4 V can corrupt RAM and program counter state.
The 44-pin MQFP package uses a 0.8 mm lead pitch, which is hand-solderable with a fine-tip iron but requires a reflow profile with peak temperature 245-260 C and soak time of 60-90 seconds between 150-200 C. Place a 0.1 uF decoupling capacitor within 5 mm of each VDD pin (pins 11 and 31) and a single 10 uF bulk tantalum or ceramic cap near the analog VDD/VSS pair (pins 42/41). Keep the analog supply trace separated from digital switching traces to minimize ADC noise coupling.
For accurate 12-bit ADC readings, the analog supply (AVDD) should be filtered with a ferrite bead or 10 ohm resistor from the digital VDD, with a 0.1 uF + 10 uF capacitor pair at the AVDD pin. Configure unused ADC channels as digital I/O via the ADCON1 register (set PCFGx bits) to prevent floating-input shoot-through current. The ADC acquisition time must be at least 19.72 microseconds at 20 MHz; use the recommended TACQ values from Microchip AN546 rather than the minimum value to avoid gain error.
合規資訊
Compliance information not present in Verified Web Data. Microchip's standard PIC16C7X family ships with Pb-free / RoHS-compliant lead finish on commercial and industrial variants per Microchip product stewardship policy, but this could not be verified from the provided sources.
