PIC16LC774/P - 8-Bit MCU, 7KB OTP, 20MHz, 40-DIP | Microchip
MPN: PIC16LC774/P ✓ Hoạt độngPIC16LC774/P Tóm tắt
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (ROM/Flash/OTP), working memory (RAM), and I/O peripherals. The PIC16LC774 belongs to the PIC16 family of 8-bit Harvard-architecture MCUs from Microchip, a category characterized by RISC instruction sets, OTP or Flash program memory, and integrated peripherals such as timers, ADC, and USART. Within the broader taxonomy, the PIC16LC774 sits under 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor IC. Designers choose PIC16 devices for deterministic interrupt latency, mature toolchains (MPLAB X, XC8), and pin-compatibility across family members, simplifying board reuse when migrating between code-density or peripheral options.
Key features of the PIC16LC774/P include 7KB OTP program memory with 4K x 14 organization, 256 bytes of data RAM, 33 I/O pins, and a maximum clock frequency of 20 MHz at 5V. The part is rated for the commercial 0C to +70C temperature range and is supplied in a 40-pin PDIP through-hole package (suffix /P). It integrates a RISC core, multiple timers, an analog comparator, and serial peripherals typical of the PIC16 mid-range family, allowing it to drive a wide variety of control loops without external logic.
The architecture is based on the Microchip PIC16C-series mid-range core, an enhanced Harvard design with separate program and data buses. OTP (One-Time Programmable) memory enables low-cost prototyping and small-to-medium production runs where in-field firmware updates are not required. Compared with Flash-based siblings, OTP variants offer tighter security against bit-stream extraction but cannot be re-programmed, so designers should plan for programming at the board-level or via a device programmer before final assembly.
Typical applications include industrial control panels, white-goods appliances, hobby and educational development kits, embedded instrumentation, and legacy system retrofits where 8-bit deterministic behavior and through-hole assembly are preferred. The 33 I/O count is sufficient to drive keypad scans, multiplexed displays, and small sensor arrays.
Designers should verify that the OTP programming step is incorporated into the production flow, since OTP parts cannot be field-updated. For new designs where firmware iteration is anticipated, consider the Flash-based PIC16F-series siblings as drop-in migration options. Decoupling VDD/VSS with 100 nF ceramic capacitors placed within 5 mm of the package pins, and adding a bulk 10 uF electrolytic on the supply rail, is recommended for reliable brown-out behavior.
This page synthesizes distributor pricing, drop-in alternative listings, and practical design notes that are not co-located in the manufacturer datasheet, providing engineers a single source for sourcing decisions, replacement planning, and lifecycle management.
Bộ thay thế dễ dàng lắp đặt cho PIC16LC774/P — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC16LC774/P (cùng hình factor và footprint) — khác nhau ở Package, Timers, Operating Temperature, Program Memory Size, Mounting Type.
PIC16LC773-I/SP
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16LC771-I/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16LC770-I/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16LC66-04/P
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LC65A-04I/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C711-04/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC774/P Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit PIC16 mid-range RISC |
| Program Memory Size | 7 KB (4K x 14 OTP) |
| Data RAM | 256 bytes |
| Tần số xung maksimum | 20 MHz |
| Operating Voltage | 5 V |
| Number of I/O Pins | 33 |
| Package Type | 40-pin PDIP (0.600", 15.24mm) - through-hole |
| Temperature Grade | Commercial 0C to +70C |
| Program Memory Type | OTP (One-Time Programmable) |
| Terminal Form | Through-Hole |
| Number of Terminals | 40 |
| Package Code | DIP |
| Package Shape | Rectangular |
| Series | PIC16C |
Cấu hình chân PIC16LC774/P
| Chân 1 | MCLR/VPP — Master Clear (reset, active low) / Programming voltage input |
| Chân 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Chân 4 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| Chân 5 | RA3/AN3/VREF — PORTA bit 3 / Analog input 3 / Voltage reference |
| Chân 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / Slave select |
| Chân 8 | RE0/RD/AN5 — PORTE bit 0 / Read control / Analog input 5 |
| Chân 9 | RE1/WR/AN6 — PORTE bit 1 / Write control / Analog input 6 |
| Chân 10 | RE2/CS/AN7 — PORTE bit 2 / Chip select / Analog input 7 |
| Chân 11 | VDD — Positive supply (5V) |
| Chân 12 | VSS — Ground |
| Chân 13 | OSC1/CLKIN — Oscillator input / external clock input |
| Chân 14 | OSC2/CLKOUT — Oscillator output / clock output |
| Chân 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Chân 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Chân 17 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| Chân 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 19 | RD0/PSP0 — PORTD bit 0 / Parallel slave port bit 0 |
| Chân 20 | RD1/PSP1 — PORTD bit 1 / Parallel slave port bit 1 |
| Chân 21 | RD2/PSP2 — PORTD bit 2 / Parallel slave port bit 2 |
| Chân 22 | RD3/PSP3 — PORTD bit 3 / Parallel slave port bit 3 |
| Chân 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 25 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| Chân 26 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| Chân 27 | RD4/PSP4 — PORTD bit 4 / Parallel slave port bit 4 |
| Chân 28 | RD5/PSP5 — PORTD bit 5 / Parallel slave port bit 5 |
| Chân 29 | RD6/PSP6 — PORTD bit 6 / Parallel slave port bit 6 |
| Chân 30 | RD7/PSP7 — PORTD bit 7 / Parallel slave port bit 7 |
| Chân 31 | VSS — Ground |
| Chân 32 | VDD — Positive supply (5V) |
| Chân 33 | RB0/INT — PORTB bit 0 / External interrupt |
| Chân 34 | RB1 — PORTB bit 1 |
| Chân 35 | RB2 — PORTB bit 2 |
| Chân 36 | RB3/PGM — PORTB bit 3 / Low-voltage programming |
| Chân 37 | RB4 — PORTB bit 4 |
| Chân 38 | RB5 — PORTB bit 5 |
| Chân 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 40 | RB7/PGD — PORTB bit 7 / ICSP data |
Ứng dụng tiêu biểu
PIC16LC774/P phù hợp cho 6 Áp dụngs: Industrial Control Panels, White-Goods Appliance Control, Hobby and Educational Development Kits, Embedded Instrumentation Front-Ends, Legacy System Retrofits, Sensor Hub Aggregators.
Industrial Control Panels
The PIC16LC774/P fits industrial control panels that need deterministic 8-bit behavior at a low BOM cost. With 33 I/O pins and 7 KB OTP, it can scan a 4x4 keypad matrix, drive a multiplexed 7-segment or character LCD, and toggle relays through optocouplers without external logic. The 20 MHz clock gives 5 MIPS throughput, enough for PID loops running at 10 ms intervals. Compared with newer ARM Cortex-M0 MCUs, the PIC16LC774/P has smaller code density and slower serial, but lower quiescent current and proven toolchain (MPLAB X + XC8) make it ideal for retrofits of existing industrial lines where firmware is fixed. Pair it with a 5V linear LDO and add a 100 nF + 10 uF decoupling network near the VDD/VSS pins.
Được đề xuất
White-Goods Appliance Control
The PIC16LC774/P is well-suited to white-goods appliance control boards - washing machines, dishwashers, and small kitchen appliances - that run fixed firmware and require simple motor or heater switching. The 33 I/O pins handle pushbutton matrices, rotary encoders, segment displays, and TRIAC optocoupler drivers without external mux logic. The 5V supply is compatible with the existing white-goods mains-isolated SMPS architecture, and the commercial 0C to +70C rating covers indoor operating conditions. Note: for designs needing in-field firmware updates (regulatory changes, feature add-ons), migrate to a PIC16F-series equivalent; the PIC16LC774/P is one-time-programmable, so plan programming into the production flow.
Được đề xuất
Hobby and Educational Development Kits
The PIC16LC774/P serves as a teaching platform for embedded systems courses, university microcontroller labs, and DIY hobby kits. Its through-hole 40-pin PDIP allows easy breadboarding and rework without reflow equipment, and the mature PIC16C-series toolchain (MPLAB X IDE + XC8 compiler + PICkit 3/4 debugger) supports both assembly and C learning paths. With 7 KB OTP and 256 B RAM, students can practice GPIO, timers, ADC, USART, and EEPROM emulation patterns. The 33 I/O count lets instructors wire up LED arrays, character LCDs, and motor shields on a single board. The PIC16LC774 is a stepping stone from the smaller PIC16C711 to the more complex PIC16F877A, giving a graded curriculum path.
Được đề xuất
Embedded Instrumentation Front-Ends
The PIC16LC774/P is appropriate for cost-sensitive embedded instrumentation front-ends - handheld DMMs, low-cost oscilloscope probes, simple data loggers - that stream 8-bit ADC samples through a USART or I2C bus. The 33 I/O count can address a 4-digit LED driver, a rotary encoder, and a buzzer without external logic; the 5 MIPS throughput handles sampling rates up to a few hundred kHz when the ADC is used in a polled loop. The OTP memory is suitable for fixed-function instruments where the firmware is calibrated once at production. Estimate: at 20 MHz, an 8-bit ADC conversion in mid-range PIC16 takes about 20 us, giving a 50 kS/s single-channel sample rate; pair with a 5V LDO and an op-amp front-end for full instrumentation.
Được đề xuất
Legacy System Retrofits
The PIC16LC774/P is ideal as a drop-in replacement in legacy system retrofits where a discontinued 8-bit MCU must be replaced without a PCB redesign. Its 40-pin PDIP footprint matches the original PIC16C-series parts widely used through the 1990s and 2000s, allowing direct socket replacement. Engineers can recompile legacy assembly code with the current XC8 compiler and program the new OTP part on the same device programmer. Compared with Flash-based PIC16F-series, the OTP PIC16LC774/P maintains tighter code protection since OTP bits cannot be read back once locked, an advantage for retrofits of security-sensitive legacy equipment.
Được đề xuất
Sensor Hub Aggregators
The PIC16LC774/P fits low-cost sensor hub aggregators that collect data from analog or digital sensors (temperature, humidity, simple proximity) over I2C or SPI and forward aggregated packets to a host MCU or UART bridge. The 7 KB OTP memory can host a small sensor-protocol stack and a UART framing layer, while the 33 I/O pins support up to 5 SPI or I2C sensor slaves with extra GPIOs for interrupts and status LEDs. The 5V supply is directly compatible with common industrial sensor rails, and the commercial 0C to +70C range covers indoor and sheltered industrial cabinets. For battery-powered sensor nodes, the low-power SLEEP mode (microamp-level current) keeps idle consumption low; the PIC16LC774/P's main limitation is no on-chip EEPROM, so use external I2C EEPROM if non-volatile parameter storage is needed.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LC774/P — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC16LC773-I/SP | PIC16LC771-I/P | PIC16LC770-I/P | PIC16LC66-04/P | PIC16C711-04/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-pin PDIP (0.600") | 40-pin SPDIP (0.600") - same | 40-pin PDIP (0.600") - same | 40-pin PDIP (0.600") - same | 40-pin PDIP (0.600") - same | 40-pin PDIP (0.600") - same |
| Program Memory | 7 KB OTP (4K x 14) | 7 KB OTP (4K x 14) | 7 KB OTP | 7 KB OTP | 8 KB OTP | 1.75 KB OTP |
| Data RAM | 256 B | 192 B | 192 B | 192 B | 192 B | 128 B |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 16 MHz | 4 MHz | 4 MHz |
| I/O Pins | 33 | 33 | 28 | 28 | 33 | 15 |
| Operating Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Temperature Grade | Commercial 0C to +70C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Commercial 0C to +70C | Commercial 0C to +70C |
Bảo phân biệt quan trọng
- Higher data RAM (256 B) than PIC16LC773 (192 B) (vsPIC16LC773-I/SP)
- Higher I/O count (33 pins) than PIC16LC771 (28 pins) (vsPIC16LC771-I/P)
- Higher max clock (20 MHz) than PIC16LC770 (16 MHz) (vsPIC16LC770-I/P)
- Higher max clock (20 MHz) than PIC16C711-04/P (4 MHz) (vsPIC16C711-04/P)
Ghi chú thiết kế
Estimated: The PIC16LC774/P VDD pin should be decoupled with a 100 nF ceramic capacitor placed within 5 mm of the package pin, plus a bulk 10 uF electrolytic on the supply rail. Brown-out detection must be enabled in the configuration bits if the device is exposed to a slowly rising 5V rail, otherwise the part may execute undefined code during ramp-up. The /P package has a higher inductance than the SOIC variants, so decoupling is more critical; never power the part from a single LDO without bulk capacitance on the input side.
The 40-pin PDIP through-hole footprint allows generous trace routing under the device, but keep digital switching traces (PORTC USART, PORTB ICSP) away from analog inputs (PORTA analog inputs, PORTE analog inputs) to avoid coupled noise. The ICSP pins RB6/PGC and RB7/PGD should be brought out to a header so production programmers can access the part without removing it from the board. MCLR/VPP must be tied to VDD through a 10 kohm pull-up so that in-circuit programming does not require external reset toggling.
Estimated: PIC16LC774/P is OTP, not Flash - once programmed, the code memory cannot be re-programmed. Plan a prototype build with Flash-based PIC16F-series equivalents before committing to OTP production. Also note that some early datasheets show the parallel slave port (PSP) pins on PORTD; verify against the latest revision of the datasheet, as the PSP is a less-used peripheral and may be omitted on cost-reduced silicon revisions. Avoid mixing 20 MHz parts with 4 MHz siblings on the same PCB - crystal load capacitors differ and the oscillator circuit may not start reliably with the wrong values.
Thông tin tuân thủ
RoHS and REACH status not explicitly stated in the verified distributor data. /P package is through-hole PDIP - lead-free availability not confirmed; contact Microchip for current compliance documentation. AEC-Q100 not applicable - this is a commercial-grade part, not automotive-qualified.
