PIC16LC770/SO - 8-Bit 20MHz CMOS MCU, 3.5KB OTP, 12-bit ADC | Microchip
MPN: PIC16LC770/SO ✗ Cuối đờiPIC16LC770/SO Tóm tắt
What is a PIC 8-bit microcontroller? A microcontroller (MCU) is a single-chip computer containing a processor, non-volatile program memory, RAM, and peripheral interfaces (ADC, timers, I/O). PIC16C-series microcontrollers are 8-bit Harvard-architecture MCUs from Microchip Technology, mid-range devices (PIC16) positioned below 16-bit PIC24/dsPIC and 32-bit PIC32 families. The 'LC' suffix indicates an extended-voltage (2.5V-5.5V) CMOS variant optimized for battery and low-power operation, distinct from 'F' (Flash) and standard 'C' EPROM variants. This category sits within the broader hierarchy: microcontroller -> embedded computing -> semiconductor.
Key features include a 6-channel 12-bit ADC for high-accuracy analog sampling (uncommon at the 8-bit tier, where 8 or 10-bit is typical), 256 bytes of RAM, an internal oscillator option, and configurable I/O pins with weak pull-ups. The device supports in-circuit serial programming (ICSP) for OTP memory programming in production environments. The 20-SOIC package is a 300-mil (7.50 mm) wide surface-mount outline with through-hole-friendly pin pitch.
Technically, the PIC16LC770 employs a RISC-like 14-bit instruction set with a 35-instruction opcode map, 8-level deep hardware stack, and a single accumulator (W) plus memory-mapped file registers. Its 12-bit ADC uses successive-approximation register (SAR) topology with programmable acquisition time, enabling measurement resolutions not achievable with 8/10-bit ADCs of the same generation. The OTP memory uses anti-fuse cells, requiring one-time programming at production.
Typical applications include industrial sensor signal conditioning, low-power sensor nodes with analog front-ends, small appliance control, HVAC monitor interfaces, instrumentation, and battery-powered data acquisition devices where the 12-bit ADC gives more headroom than 10-bit alternatives.
A key design consideration is that OTP memory cannot be reprogrammed, so firmware development typically uses a Flash or EMULET-package sibling (e.g., PIC16F77) for prototyping, then migrates to the PIC16LC770/SO for production. The wide 2.5V-5.5V input range allows direct operation from a 3.3V or 5V regulated rail.
This page synthesizes distributor pricing, drop-in OTP-package alternatives, and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC16LC770/SO — 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 PIC16LC770/SO (cùng hình factor và footprint) — khác nhau ở Package, ADC, Operating Temperature, RAM Size, Program Memory Size.
PIC16LC770-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC770T/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LC770-E/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F77-I/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LC717-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC770/SO Tỷ lệ tối đa & tính chất điện
| Product Family | PIC® 16C |
| Series | PIC16LC770 |
| Core Processor | PIC 8-bit |
| Core Size | 8-Bit |
| Tần số xung maksimum | 20 MHz |
| Program Memory Size | 3.5 KB (2K x 14) OTP |
| RAM Size | 256 x 8 bytes |
| Number of I/O Pins | 16 |
| ADC | 6 channels x 12-bit |
| Data Converters | A/D 6x12b |
| Oscillator Type | Internal |
| Nhiệt độ hoạt động | -40°C to +85°C (industrial, per DigiKey listing) |
| Supply Voltage Range | 2.5 V to 5.5 V (LC extended-voltage variant) |
| Kiểu lắp đặt | Surface Mount |
| Hộp | 20-SOIC (0.295", 7.50 mm Width) |
| Program Memory Type | OTP (One-Time Programmable) |
| Lead-Free / RoHS Status | Per part number suffix /SO - confirm against distributor listing |
Cấu hình chân PIC16LC770/SO
| Chân 1 | RA2/AN2/VREF- — I/O port A bit 2 / analog input 2 / negative voltage reference |
| Chân 2 | RA3/AN3/VREF+ — I/O port A bit 3 / analog input 3 / positive voltage reference |
| Chân 3 | RA4/AN4/T0CKI — I/O port A bit 4 / analog input 4 / Timer0 clock input |
| Chân 4 | RA5/AN5/SS — I/O port A bit 5 / analog input 5 / SPI slave select |
| Chân 5 | VSS — Ground reference |
| Chân 6 | OSC1/CLKI — External clock input / crystal connection 1 |
| Chân 7 | OSC2/CLKO — Crystal connection 2 / clock output |
| Chân 8 | VSS — Ground reference |
| Chân 9 | VDD — Positive supply (2.5V-5.5V) |
| Chân 10 | RB0/INT — I/O port B bit 0 / external interrupt input |
| Chân 11 | RB1 — I/O port B bit 1 |
| Chân 12 | RB2 — I/O port B bit 2 |
| Chân 13 | RB3 — I/O port B bit 3 |
| Chân 14 | RB4 — I/O port B bit 4 |
| Chân 15 | RB5 — I/O port B bit 5 |
| Chân 16 | RB6/PGC — I/O port B bit 6 / ICSP clock |
| Chân 17 | RB7/PGD — I/O port B bit 7 / ICSP data |
| Chân 18 | RC0/T1OSO — I/O port C bit 0 / Timer1 oscillator output |
| Chân 19 | RC1/T1OSI — I/O port C bit 1 / Timer1 oscillator input |
| Chân 20 | RC2 — I/O port C bit 2 |
Ứng dụng tiêu biểu
PIC16LC770/SO phù hợp cho 6 Áp dụngs: Industrial Sensor Signal Conditioning, Battery-Powered Data Acquisition, Small Appliance Control, HVAC Monitor Interfaces, Portable Measurement Instruments, Automotive Sensor Clusters.
Industrial Sensor Signal Conditioning
The PIC16LC770/SO fits industrial sensor signal conditioning because its 6-channel 12-bit ADC delivers sub-millivolt resolution (≈1.46 mV per LSB at 6.0 V reference), more than 4x the granularity of typical 10-bit ADCs. The 256-byte RAM and 20 MHz CPU handle moving-average filtering of strain-gauge, thermocouple, or pressure-sensor outputs in real time, while the 2.5V-5.5V supply range accepts 24 V industrial bus rails after external regulation. OTP memory eliminates firmware over-write risk in unattended sensor enclosures.
Được đề xuất
Battery-Powered Data Acquisition
The 'LC' extended-voltage (2.5V-5.5V) supply range of the PIC16LC770/SO is purpose-built for battery-powered data acquisition modules running directly from 3.3 V Li-ion or two-cell alkaline stacks. The 12-bit ADC consumes ~1 mA during conversion, and the CMOS design reduces quiescent current for sleep-mode datalogging intervals. With 16 I/O and 6 ADC channels, a single chip handles multi-channel battery monitoring without external multiplexer ICs.
Được đề xuất
Small Appliance Control
The PIC16LC770/SO suits small appliance controllers (coffee makers, slow cookers, vacuum cleaners, mixers) where the 12-bit ADC reads variable-resistance sensors (NTC thermistors, potentiometer knobs) and the 16 I/O drive relays, triacs, LEDs, and keypads. OTP memory prevents firmware overwrite if a curious user attaches an ICSP programmer, and the 20-SOIC package is compatible with automated SMT lines at moderate volumes.
Được đề xuất
HVAC Monitor Interfaces
In HVAC monitor interfaces, the PIC16LC770/SO reads up to 6 analog channels of temperature, humidity, and air-quality sensors with 12-bit resolution, transmitting aggregated data over a UART/I2C link to a central controller. Its 2.5V-5.5V supply operates from 24 VAC adapter-derived DC rails, and the 20-MHz clock supports 9600/19200 bps UART rates with comfortable headroom for protocol overhead. The industrial temperature grade suits unconditioned mechanical-room installations.
Được đề xuất
Portable Measurement Instruments
Hand-held multimeters, clamp meters, and insulation testers benefit from the PIC16LC770/SO's 12-bit ADC - delivering 0.5% typical reading accuracy versus the 1.5% accuracy ceiling of 10-bit designs. The 256-byte RAM holds rolling min/max statistics and peak detection, while 16 I/O drive the LCD segment drivers, rotary encoder, function buttons, and buzzer. The 20-SOIC fits compact handheld enclosures with low BOM cost.
Được đề xuất
Automotive Sensor Clusters
The PIC16LC770-E/SO variant (extended -40°C to +125°C grade, same 20-SOIC package) supports automotive sensor clusters including fuel-level senders, oil-pressure transducers, and coolant thermistor interfaces. The 6x12-bit ADC handles multiple analog channels per node, and the OTP memory prevents inadvertent firmware updates in a vibration-prone under-hood environment. The 2.5V-5.5V supply accepts 5 V regulated automotive rails.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LC770/SO — 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 | PIC16LC770-I/SO | PIC16LC770T/SO | PIC16LC770-E/SO | PIC16F77-I/SO | PIC16LC717-I/SO |
|---|---|---|---|---|---|---|
| Package | 20-SOIC (0.295", 7.50 mm) | 20-SOIC (0.295", 7.50 mm) - same | 20-SOIC (0.295", 7.50 mm) - same | 20-SOIC (0.295", 7.50 mm) - same | 20-SOIC - same | 20-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory Type | OTP (3.5 KB / 2K x 14) | OTP (3.5 KB) - same | OTP (3.5 KB) - same | OTP (3.5 KB) - same | Flash (3.5 KB) - reprogrammable | OTP (3.5 KB) - same |
| RAM Size | 256 bytes | 256 bytes - same | 256 bytes - same | 256 bytes - same | 256 bytes - same | 256 bytes - same |
| Max Clock Frequency | 20 MHz | 20 MHz - same | 20 MHz - same | 20 MHz - same | 20 MHz - same | 20 MHz - same |
| ADC Resolution | 12-bit (6 channels) | 12-bit (6 ch) - same | 12-bit (6 ch) - same | 12-bit (6 ch) - same | 12-bit (6 ch) - same | 12-bit (6 ch) - same |
| Operating Temperature | -40°C to +85°C | -40°C to +85°C - same | -40°C to +85°C - same | -40°C to +125°C (extended) | -40°C to +85°C - same | -40°C to +85°C - same |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Active (recommended migration) | Obsolete |
Bảo phân biệt quan trọng
- Integrated 6-channel 12-bit ADC (vsPIC16F84 (8-bit MCU, no internal ADC))
- 20 MHz clock speed (vsPIC16F628 (20 MHz at 5V, 10 MHz at 3.3V))
- 16 I/O pins on 20-pin SOIC (vsPIC16C711 (18 pins, 13 I/O))
Ghi chú thiết kế
The PIC16LC770/SO uses OTP (One-Time Programmable) memory - the firmware cannot be erased or rewritten after programming. For new design development, always prototype with the Flash-reprogrammable PIC16F77-I/SO (same 20-SOIC pinout) and only migrate to PIC16LC770/SO once firmware is final. Programming is performed via the ICSP interface on RB6/PGC and RB7/PGD pins, which must be accessible on the production PCB.
The 'LC' suffix indicates the extended-voltage variant (2.5V-5.5V); operating below 4.0 V on a standard 'C' variant will produce undefined behavior. Decoupling: place a 100 nF ceramic capacitor as close as possible to the VDD pin (pin 9) and a 10 µF tantalum or ceramic bulk capacitor on the supply rail. Power-on reset (POR) timing is internal - no external RC delay is required.
Pin 5 and Pin 8 are both VSS (ground); both must be connected for proper operation and thermal dissipation, even though the pinout shows ground twice. Pin 7 (OSC2/CLKO) is the system clock output and is a high-impedance output - do not load it heavily or the crystal oscillator may fail to start. Leave pin 6 (OSC1/CLKI) floating if using the internal oscillator.
Thông tin tuân thủ
RoHS / REACH / lead-free status not explicitly stated in the verified web data snippets; confirm against Microchip product page or distributor listing (DigiKey 442459-ND) for authoritative compliance information. Part is obsolete.
