PIC16F74T-E/ML - 8-bit PIC MCU, 7KB Flash, 44-VQFN | Microchip
MPN： PIC16F74T-E/ML ✓ 啟用中PIC16F74T-E/ML 概覽
An 8-bit PIC microcontroller is a RISC-based Harvard-architecture device that integrates a CPU, non-volatile Flash program memory, SRAM data memory, and a rich set of peripherals on a single die. PIC microcontrollers sit within the broader hierarchy of microcontroller -> embedded controller -> semiconductor IC, and the PIC16F74 specifically belongs to the mid-range PIC16 family that bridges the baseline PIC10/12/16 and the high-performance PIC18/24 families. The 8-bit data path keeps instruction fetch and execution deterministic, which is favored in real-time control loops.
Key features of the PIC16F74 include an operating frequency up to 20 MHz, on-chip Flash program memory with self-programming support, 192 bytes of data RAM, 33 digital I/O lines, an 8-channel 8-bit ADC, three timer modules (Timer0, Timer1, Timer2), a Capture/Compare/PWM (CCP) module, an SSP, a USART, and a brown-out reset (BOR) circuit. The device operates across the standard PIC16F74 industrial voltage range and is offered in tape-and-reel ('T') packaging with the /ML QFN suffix.
Architecturally, the PIC16F74 uses a 14-bit instruction word with separate program and data buses, enabling simultaneous instruction fetch and operand read. The 8-bit ALU performs arithmetic, logic, and bit-manipulation operations in a single instruction cycle, which simplifies code generation for embedded developers. The integrated analog and digital peripherals are memory-mapped and configured via dedicated SFRs.
Typical applications for the PIC16F74T-E/ML include industrial control systems, sensor interfacing and data acquisition, motor control, automotive body electronics, white goods and appliance subsystems, and general-purpose embedded controllers requiring a 44-pin footprint with extended GPIOs. It is a strong fit where deterministic 8-bit control, on-board A/D conversion, and serial communication are needed.
When designing with this device, ensure the exposed thermal pad of the VQFN-44 package is soldered to a sufficient copper pour for heat dissipation and ground continuity. The 'E' suffix denotes the extended industrial temperature range, allowing reliable operation across harsh environments, which must be confirmed against the device errata and datasheet electrical characteristics before final qualification.
This page synthesizes distributor pricing, drop-in alternatives from Microchip's PIC16F family, comparison parameters, and practical design notes that are not collated in the manufacturer datasheet alone, helping engineers quickly evaluate fit and sourcing options for the PIC16F74T-E/ML.
直接替換替代品，適用於 PIC16F74T-E/ML — 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： PIC16F74T-E/ML （相同外形與佔位） — 差異在於 Package, Serial Interfaces, Timers, Operating Temperature, ADC.
PIC16F74-E/ML
✅ 直接替換聯絡詢價
查看資料表 →PIC16F747-E/ML
✅ 直接替換聯絡詢價
查看資料表 →PIC16F74-I/ML
✅ 直接替換聯絡詢價
查看資料表 →PIC16F74T-E/ML 最大額定值與電氣特性
| Core | PIC16 (8-bit RISC) |
| Instruction Set Width | 14-bit |
| Program Memory Type | Flash |
| Program Memory Size | 7 KB |
| Data RAM | 192 B |
| Maximum Operating Frequency | 20 MHz |
| Instruction Execution Time | 200 ns (5 MIPS) |
| Number of Instructions | 35 (single-word) |
| I/O Pins | 33 |
| ADC | 8 channels, 8-bit resolution |
| Timers | 3 (Timer0, Timer1, Timer2) |
| CCP Modules | 1 (Capture/Compare/PWM) |
| Serial Interfaces | SSP, USART |
| Brown-Out Reset | Yes |
| 封裝 | 44-pin VQFN (ML) with exposed pad |
| 安裝類型 | Surface Mount |
| 工作溫度範圍 | -40C to +125C (E = extended industrial) |
| Packaging Form | Tape & Reel (T suffix) |
| RoHS 狀態 | Compliant |
| MSL 等級 | 3 (168 hours) |
PIC16F74T-E/ML 腳位配置
| 腳位 1 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| 腳位 2 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| 腳位 3 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| 腳位 4 | RA3/AN3/VREF — PORTA bit 3 / Analog input 3 / ADC reference |
| 腳位 5 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| 腳位 6 | RA5/AN4/CCP2 — PORTA bit 5 / Analog input 4 / CCP2 output |
| 腳位 7 | OSC1/CLKIN — Oscillator input / external clock input |
| 腳位 8 | OSC2/CLKOUT — Oscillator output / clock output |
| 腳位 9 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| 腳位 10 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| 腳位 11 | RC2/CCP1 — PORTC bit 2 / CCP1 I/O |
| 腳位 12 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| 腳位 13 | RD0/PSP0 — PORTD bit 0 / Parallel slave port bit 0 |
| 腳位 14 | RD1/PSP1 — PORTD bit 1 / Parallel slave port bit 1 |
| 腳位 15 | RD2/PSP2 — PORTD bit 2 / Parallel slave port bit 2 |
| 腳位 16 | RD3/PSP3 — PORTD bit 3 / Parallel slave port bit 3 |
| 腳位 17 | RD4/PSP4 — PORTD bit 4 / Parallel slave port bit 4 |
| 腳位 18 | RD5/PSP5 — PORTD bit 5 / Parallel slave port bit 5 |
| 腳位 19 | RD6/PSP6 — PORTD bit 6 / Parallel slave port bit 6 |
| 腳位 20 | RD7/PSP7 — PORTD bit 7 / Parallel slave port bit 7 |
| 腳位 21 | VSS — Ground reference |
| 腳位 22 | VDD — Positive supply voltage |
| 腳位 23 | RB0/INT — PORTB bit 0 / External interrupt |
| 腳位 24 | RB1 — PORTB bit 1 |
| 腳位 25 | RB2 — PORTB bit 2 |
| 腳位 26 | RB3/PGM — PORTB bit 3 / Low-voltage programming input |
| 腳位 27 | RB4 — PORTB bit 4 |
| 腳位 28 | RB5 — PORTB bit 5 |
| 腳位 29 | RB6/PGC — PORTB bit 6 / ICSP clock |
| 腳位 30 | RB7/PGD — PORTB bit 7 / ICSP data |
| 腳位 31 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| 腳位 32 | RC5/SDO — PORTC bit 5 / SPI data out |
| 腳位 33 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| 腳位 34 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| 腳位 35 | RE0/RD/AN5 — PORTE bit 0 / Read control / Analog input 5 |
| 腳位 36 | RE1/WR/AN6 — PORTE bit 1 / Write control / Analog input 6 |
| 腳位 37 | RE2/CS/AN7 — PORTE bit 2 / Chip select / Analog input 7 |
| 腳位 38 | MCLR/VPP — Master clear reset / programming voltage |
| 腳位 39 | NC — Not connected (per datasheet) |
| 腳位 40 | NC — Not connected (per datasheet) |
| 腳位 41 | NC — Not connected (per datasheet) |
| 腳位 42 | NC — Not connected (per datasheet) |
| 腳位 43 | NC — Not connected (per datasheet) |
| 腳位 44 | NC — Not connected (per datasheet) |
典型應用
PIC16F74T-E/ML 適用於 6 應用s: Industrial Sensor Monitoring, Motor Control and Drive Signaling, Appliance Control Boards, Automotive Body Electronics, Data Acquisition Front-Ends, General-Purpose Embedded Controllers.
Industrial Sensor Monitoring
The PIC16F74T-E/ML's 8-channel 8-bit ADC and 33 I/O pins let it interface with multiple analog sensors (temperature, pressure, flow) in industrial monitoring nodes. The 20 MHz / 5 MIPS core samples each channel at deterministic intervals, while the extended -40C to +125C temperature range handles factory-floor conditions. Its 7KB Flash stores calibration tables and linearization curves; the USART streams telemetry to a host PLC or gateway.
推薦
Motor Control and Drive Signaling
The PIC16F74T-E/ML integrates one Capture/Compare/PWM (CCP) module and three timers, sufficient to generate PWM drive signals for small DC or stepper motors and to capture feedback from Hall sensors or optical encoders. With 7KB Flash, the firmware can implement PID control loops and soft-start routines. The 44-VQFN compact footprint fits inside motor-control PCBs where space is constrained, and the exposed pad aids thermal dissipation under sustained drive currents.
推薦
Appliance Control Boards
White goods such as washing machines, dishwashers, and HVAC controllers use the PIC16F74T-E/ML because it integrates an 8-bit ADC, USART, and PWM in a compact 44-VQFN exposed-pad package. The 7KB Flash holds application code and user-interface state machines, while 192 bytes of RAM supports small RTOS or cooperative-scheduler designs. Brown-out reset (BOR) ensures clean recovery from supply brown-outs common in appliance line-voltage environments.
推薦
Automotive Body Electronics
Body-control modules (lighting, seat controllers, mirror adjusters) deploy the PIC16F74T-E/ML for its extended -40C to +125C range and integrated peripherals. The PIC16F74's 8-channel ADC reads switch panels and sensor inputs; the USART links to LIN or CAN bridges for in-vehicle networking. The 44-VQFN surface-mount form factor supports high-density PCB layouts typical of body-electronics ECUs. Note: AEC-Q100 grade is not specifically listed for this part - verify with Microchip for safety-critical automotive use.
推薦
Data Acquisition Front-Ends
The PIC16F74T-E/ML serves as a multi-channel data-acquisition front-end, with its 8-channel 8-bit ADC sampling analog signals at up to 20 MHz core clock. The 192-byte RAM buffers recent samples before block transfer over USART/SSP to a host processor. The 7KB Flash stores calibration coefficients and protocol stacks. The exposed-pad VQFN-44 package provides good thermal performance when the ADC is sampling at high duty cycle.
推薦
General-Purpose Embedded Controllers
For cost-sensitive 8-bit embedded designs, the PIC16F74T-E/ML delivers 7KB Flash, 192 bytes RAM, three timers, one CCP, SSP, and USART in a 44-VQFN surface-mount package. The 35 single-word instructions minimize firmware complexity and speed time-to-market. The exposed thermal pad simplifies PCB layout for compact modules such as IoT edge nodes, sensor hubs, and consumer peripherals where stable 8-bit control is sufficient.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16F74T-E/ML — 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 | PIC16F74-E/ML | PIC16F747-E/ML | PIC16F74-I/ML |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin VQFN (ML) | 44-pin VQFN (ML) - same | 44-pin VQFN (ML) - same | 44-pin VQFN (ML) - same |
| Program Memory (Flash) | 7 KB | 7 KB | 7 KB | 7 KB |
| Data RAM | 192 B | 192 B | 192 B | 192 B |
| Maximum Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| I/O Pins | 33 | 33 | 36 | 33 |
| ADC Channels x Resolution | 8 x 8-bit | 8 x 8-bit | 8 x 8-bit | 8 x 8-bit |
| CCP Modules | 1 | 1 | 2 (enhanced) | 1 |
| Operating Temperature Range | -40C to +125C (E) | -40C to +125C | -40C to +125C | -40C to +85C |
| Packaging Form | Tape & Reel (T) | Tray/Tube | Tray/Tube | Tray/Tube |
主要差異化特點
- Tape-and-reel packaging for high-volume SMD assembly (對比PIC16F74-E/ML)
- Extended -40C to +125C temperature range (對比PIC16F74-I/ML)
- Enhanced CCP/USART peripherals in same footprint (對比PIC16F74-E/ML)
設計說明
Estimated: The 44-pin VQFN (ML) package relies on the exposed thermal pad for heat removal. For sustained ADC sampling at high duty cycle, calculate total power as P = Vdd x I_dd. With Vdd=5V and I_dd~15 mA typical, P is well below 100 mW; even at maximum I_dd=40 mA, P=200 mW and the exposed pad connected to at least 1 square inch of copper pour keeps junction rise within ratings. Always solder the EP for thermal and electrical continuity.
Place a 0.1 uF decoupling capacitor as close as possible to the VDD pin (pin 22 in this 44-VQFN package) and a bulk capacitor (e.g., 10 uF tantalum or ceramic) near the supply input. Provide a clean analog ground reference for ADC accuracy by using a star-ground topology or by isolating the AVSS/AGND (where applicable) from noisy digital returns. Place the MCLR/VPP pull-up (typically 10 kOhm) close to the MCLR pin to avoid spurious resets.
Always configure unused I/O pins as outputs (set the corresponding TRIS bit to 0 and drive the LAT bit low) to minimize current consumption in sleep mode. Do not float the MCLR pin - if not used for external reset, tie it to VDD through a 10 kOhm resistor. When using the ADC, allow adequate acquisition time (TACQ) per the datasheet electrical characteristics to avoid channel-to-channel crosstalk. Verify the configuration bits (FOSC, WDTE, BOREN, PWRTE) match your design intent before programming.
Route the oscillator traces (OSC1/OSC2) symmetrically and keep them short - long paths act as antennas and degrade clock stability. Place the crystal or resonator within a few millimeters of the OSC pins and guard the traces with a ground pour. For SSP/USART signals, match trace lengths where timing matters and avoid routing parallel to switching power traces. Keep the EP copper pour clear of signal vias to maintain a low-inductance ground.
合規資訊
RoHS and lead-free per Microchip product page. AEC-Q100 qualification status not specified for this part; consult Microchip for safety-critical automotive applications. Halogen-free per Microchip environmental certification.