PIC16LC57CT-04I/SO - 8-Bit 4MHz OTP MCU 3KB 28-SOIC | Microchip
MPN: PIC16LC57CT-04I/SO ✗ Cuối đờiPIC16LC57CT-04I/SO Tóm tắt
A PIC microcontroller is a low-cost, high-performance 8-bit fully-static CMOS MCU based on a RISC architecture, sitting in the broader taxonomy of microcontroller -> embedded processor -> semiconductor IC. The PIC16C5X family uses 12-bit wide instructions that are highly symmetrical, yielding roughly 2:1 code compression versus competitive 8-bit MCUs in the same price tier, while the simplified instruction set reduces development time. The PIC16LC57CT-04I/SO uses an EPROM/OTP process and is part of the low-power LC variant of the PIC16C57 lineage.
Key features include a 33-instruction set, 12-bit instruction word, two 8-bit I/O ports, a watchdog timer, an 8-bit real-time counter with 8-bit prescaler, and on-chip power-on reset. The wide-body 28-SOIC (0.295-inch / 7.50mm) package gives a robust land pattern suitable for hand-rework and production-friendly assembly, while the industrial -40C to +85C temperature range supports factory-floor and outdoor installations.
Architecturally, the device separates program memory (12-bit wide OTP EPROM) from data memory (8-bit wide static RAM), which simplifies firmware development and field programming. The 4 MHz maximum oscillator frequency yields a 1 microsecond instruction cycle, sufficient for simple control loops, user-interface scan routines, and low-speed sensor polling. The CMOS design reduces quiescent current compared with NMOS predecessors and supports battery-backed applications when paired with a sleep oscillator.
Typical applications include appliance control boards, HVAC zone controllers, low-end consumer remote controls, industrial timers, vending-machine logic boards, and simple LED display drivers. The 3KB OTP memory budget accommodates state-machine firmware with look-up tables but is too small for protocol stacks such as TCP/IP or USB, so designers typically choose PIC16LC57CT-04I/SO for deterministic, loop-based control tasks rather than connected-edge applications.
When designing with this part, verify that your firmware will fit within 2K x 12 words of OTP and that you have a programming strategy (gang programmer or ICSP) ready before committing to PCB layout. Note that OTP parts cannot be reprogrammed in-circuit once sealed by the package; use the PIC16F57 equivalent (Flash) if in-system firmware updates are required.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16LC57CT-04I/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 PIC16LC57CT-04I/SO (cùng hình factor và footprint) — khác nhau ở Timers, Package, Instruction Cycle Time, Instruction Set, Core Architecture.
PIC16LC57C-04I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F57-I/SO
✅ Drop-In✗ Hết hàng
$1.21 / Đơn vị
Xem tài liệu →PIC16F57T-I/SO
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C57C-04I/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C57C-04I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC57CT-04I/SO Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit RISC |
| Family | PIC16C5X |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 3 KB (2K x 12) |
| RAM Size | 72 x 8 bytes |
| Tần số xung maksimum | 4 MHz |
| Instruction Cycle Time | 1 microsecond at 4 MHz |
| Instruction Word Width | 12 bits |
| Number of Instructions | 33 |
| I/O Ports | 2 x 8-bit |
| Timers | Watchdog timer; RTCC with 8-bit prescaler |
| Điện áp cung cấp | 5 V (typical) |
| Nhiệt độ hoạt động | -40C to +85C (industrial) |
| Hộp | 28-SOIC (0.295 inch / 7.50 mm width) |
| Kiểu lắp đặt | Surface Mount |
| Số chân | 28 |
| Process Technology | CMOS, EPROM/OTP |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân PIC16LC57CT-04I/SO
| Chân 1 | RA2 — I/O port A bit 2 |
| Chân 2 | RA3 — I/O port A bit 3 |
| Chân 3 | RTCC — Real-Time Counter/Capture input |
| Chân 4 | MCLR — Master Clear (reset) input |
| Chân 5 | VSS — Ground reference |
| Chân 6 | RB0 — I/O port B bit 0 |
| Chân 7 | RB1 — I/O port B bit 1 |
| Chân 8 | RB2 — I/O port B bit 2 |
| Chân 9 | RB3 — I/O port B bit 3 |
| Chân 10 | RB4 — I/O port B bit 4 |
| Chân 11 | RB5 — I/O port B bit 5 |
| Chân 12 | RB6 — I/O port B bit 6 |
| Chân 13 | RB7 — I/O port B bit 7 |
| Chân 14 | VDD — Positive supply voltage |
| Chân 15 | OSC2 — Oscillator output |
| Chân 16 | OSC1 — Oscillator input |
| Chân 17 | RC0 — I/O port C bit 0 |
| Chân 18 | RC1 — I/O port C bit 1 |
| Chân 19 | RC2 — I/O port C bit 2 |
| Chân 20 | RC3 — I/O port C bit 3 |
| Chân 21 | RC4 — I/O port C bit 4 |
| Chân 22 | RC5 — I/O port C bit 5 |
| Chân 23 | RC6 — I/O port C bit 6 |
| Chân 24 | RC7 — I/O port C bit 7 |
| Chân 25 | RA0 — I/O port A bit 0 |
| Chân 26 | RA1 — I/O port A bit 1 |
| Chân 27 | T0CKI — Timer0 clock input |
| Chân 28 | VDD — Positive supply voltage |
Ứng dụng tiêu biểu
PIC16LC57CT-04I/SO phù hợp cho 6 Áp dụngs: Appliance Control Board, HVAC Zone Controller, Consumer Remote Control, Industrial Timer and Counter, Vending Machine Logic Board, Simple LED Display Driver.
Appliance Control Board
The PIC16LC57CT-04I/SO fits appliance control boards (washing machines, dishwashers, microwave ovens) because its 3 KB OTP program memory accommodates scan-loop firmware with timer state machines, while 72 bytes RAM handles button-debounce buffers and LED refresh tables. The 4 MHz clock yields 1 us instruction cycles, sufficient for relay sequencing at 10 ms resolution. The 28-SOIC wide-body package is hand-solderable for prototyping, and the -40C to +85C industrial range covers garage and kitchen environments. Unlike Flash MCUs the OTP design prevents field firmware tampering, a security plus for sealed appliance units.
Được đề xuất
HVAC Zone Controller
The PIC16LC57CT-04I/SO suits HVAC zone damper and thermostat controllers because its RTCC with 8-bit prescaler handles thermostat timing, the watchdog timer ensures firmware recovery from brown-outs, and the CMOS LC process keeps quiescent current low for battery-backed thermostats. Two 8-bit I/O ports drive up to 16 relays or triac outputs for multi-zone dampers. The 4 MHz clock rate and 33-instruction RISC set run scan loops every 100 ms with margin. The 28-SOIC industrial temperature rating handles attic and basement installations.
Được đề xuất
Consumer Remote Control
The PIC16LC57CT-04I/SO is ideal for low-end IR remote controls because 3 KB of OTP memory fits keypad-scanning and IR protocol tables (RC5, NEC, SIRC), and the 4 MHz core generates accurate 38 kHz carrier frequencies for IR LED modulation. The low-power CMOS LC process extends battery life versus NMOS MCUs. Two 8-bit ports scan a 4x4 matrix keypad plus IR output. The 28-SOIC wide-body is mechanically robust in handheld enclosures, and the OTP-only architecture prevents unauthorized firmware cloning of OEM remote designs.
Được đề xuất
Industrial Timer and Counter
The PIC16LC57CT-04I/SO fits industrial timer and counter modules because its RTCC hardware counter with 8-bit prescaler handles long-duration event counting (10 ms to 65 seconds without firmware overhead), and its watchdog timer recovers from ESD-induced lockups in factory-floor environments. The 72-byte RAM stores elapsed-time counters and preset compare registers. The industrial -40C to +85C range survives unheated control cabinets. The 28-SOIC wide-body package withstands hand-soldering in repair shops. OTP memory locks the timing algorithm against field tampering, an asset for revenue-metering or process-control timers.
Được đề xuất
Vending Machine Logic Board
The PIC16LC57CT-04I/SO works in vending-machine controller boards because its 3 KB OTP memory fits vend-state machines, coin-pulse debouncing, and price-table lookups, while 72 bytes RAM buffers keypad entries and dispense commands. Two 8-bit I/O ports drive multiplexed 7-segment displays and accept coin-mechanism pulses. The CMOS LC low-power design reduces standby current, important for unattended machines. The industrial temperature rating handles vending-cabinet thermal swings. OTP locking prevents firmware piracy that would allow free vending, a critical security requirement for unattended retail.
Được đề xuất
Simple LED Display Driver
The PIC16LC57CT-04I/SO drives multiplexed LED signs and numeric displays because its two 8-bit I/O ports (16 pins) refresh up to 64 LEDs via charlieplexing or matrix multiplexing, and the 4 MHz clock generates clean PWM dimming at 1 kHz without flicker. 72 bytes RAM stores scroll buffers and font tables for 7-segment glyphs. The OTP-only architecture protects OEM display content. The 28-SOIC wide-body package fits compact sign-controller PCBs. The industrial temperature range tolerates outdoor signage enclosures without additional thermal management.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LC57CT-04I/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 | PIC16LC57C-04I/SO | PIC16F57-I/SO | PIC16F57T-I/SO | PIC16C57C-04I/SO | PIC16C57C-04I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (0.295 inch wide) | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-PDIP - different |
| Program Memory | 3 KB OTP EPROM | 3 KB OTP EPROM | 3 KB Flash | 3 KB Flash | 3 KB OTP EPROM | 3 KB OTP EPROM |
| RAM Size | 72 bytes | 72 bytes | 72 bytes | 72 bytes | 72 bytes | 72 bytes |
| Max Clock Frequency | 4 MHz | 4 MHz | 20 MHz | 20 MHz | 4 MHz | 4 MHz |
| Instruction Cycle | 1 us at 4 MHz | 1 us at 4 MHz | 200 ns at 20 MHz | 200 ns at 20 MHz | 1 us at 4 MHz | 1 us at 4 MHz |
| ICSP Support | No (OTP) | No (OTP) | Yes (Flash) | Yes (Flash) | No (OTP) | No (OTP) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Lifecycle Status | NRND | NRND | Active | Active | NRND | NRND |
Bảo phân biệt quan trọng
- Low-power CMOS LC process (vsPIC16C57C-04I/SO)
- Flash upgrade path on identical footprint (vsPIC16F57-I/SO)
- Tape-and-reel packaging for SMT (vsPIC16LC57C-04I/SO (without T suffix))
Ghi chú thiết kế
The PIC16LC57CT-04I/SO uses One-Time Programmable EPROM and does not support In-Circuit Serial Programming (ICSP). Firmware must be committed to the part in a gang programmer prior to PCB mounting. Designers used to working with PIC16F-series Flash MCUs often mistakenly assume ICSP is available - confirm programming strategy before locking down the BOM. For prototype iteration, build a small adapter board that lets you swap PIC16LC57CT-04I/SO with a Flash-equipped PIC16F57-I/SO (pin-compatible in 28-SOIC).
Place a 100 nF decoupling capacitor as close as possible between VDD (pin 14 or pin 28) and VSS (pin 5) to suppress switching transients on the digital supply rail. For battery-backed applications, the LC (low-power CMOS) process keeps quiescent current in the microamp range during sleep, but ensure the watchdog timer is disabled in sleep unless periodic wake-up is required. A bulk 10 uF tantalum or ceramic capacitor on the VDD rail stabilizes the supply during motor-driver transients common in appliance control.
Route the OSC1/OSC2 traces (pins 15-16) short and symmetric to minimize stray capacitance that detunes the oscillator. For a 4 MHz crystal, keep the total load capacitance (crystal + stray + caps) within 15-20 pF as specified by the crystal vendor. Place MCLR (pin 4) decoupling (typically 10 kohm pull-up to VDD with 100 nF to VSS) within 5 mm of the pin to ensure a clean reset on power-up. The 28-SOIC wide-body package gives generous trace-routing channels - avoid routing noisy relay or triac lines under the IC to prevent injected glitches on the analog VDD rail.
The PIC16LC57CT-04I/SO dissipates approximately 10 mW at 4 MHz with all I/O toggling, so the SOIC package requires no special thermal management. However, in sealed appliance enclosures with ambient temperatures above 60C, the junction-to-ambient thermal resistance of approximately 80 C/W means the die will operate roughly 8C above ambient. This is well within the 125C maximum junction temperature, so no heatsink is required even at the industrial -40C to +85C range.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - migrate to PIC16F57 or PIC16F1xxx for automotive designs. Lead-free finish confirmed. Halogen-free status not explicitly stated in verified web data.
