PIC16LC54AT-04/SO - 4MHz 8-Bit OTP MCU 768B 18-SOIC | Microchip
MPN: PIC16LC54AT-04/SO ✓ Hoạt độngPIC16LC54AT-04/SO Tóm tắt
A PIC microcontroller (Peripheral Interface Controller) is a family of Harvard-architecture microcontrollers built around a separate program-memory and data-memory bus. PIC MCUs integrate CPU core, program memory, RAM, and peripherals on a single die, and the PIC16C5x sub-family represents the original baseline 8-bit OTP/EPROM PIC architecture - the ancestor of today's much larger PIC10/12/16/18 families. In the broader taxonomy this device belongs to: microcontroller -> 8-bit MCU -> CMOS MCU -> embedded controller -> semiconductor IC.
Key features of the PIC16LC54AT-04/SO include 12 I/O pins, a two-level deep hardware stack, direct/indirect/relative addressing modes for both data and instructions, and an 8-bit real-time clock/counter (TMR0) with an 8-bit programmable prescaler. Operating supply voltage spans 3.0 V to 6.25 V (the "LC" suffix denotes the extended low-voltage CMOS variant versus the standard PIC16C54A). The fully static design allows clock frequencies to be arbitrarily reduced, and the part supports power-saving SLEEP mode with a watchdog timer for reliable recovery.
The device is fabricated using CMOS EPROM technology and supports in-system programming via the OTP memory array. Its 12-bit instruction word and orthogonal instruction set deliver code density approximately 2:1 better than competing 8-bit MCUs in the same price category. The wide operating voltage window makes the LC variant suitable for battery-powered and 5 V mixed-signal designs.
Typical applications include low-cost consumer appliances, automotive sub-system controllers, intelligent sensors, industrial control logic, IR remote-control transmitters, and small appliance timing/sequencing functions where the OTP memory model and 4 MHz clock are sufficient. The PIC16LC54A-04I/SO is the industrial-temperature-range (-40 C to +85 C) sibling; the PIC16LC54A-04E/SO is the extended-temperature variant.
When designing with this part, designers must respect the 4 MHz maximum clock and plan instruction-cycle budgets accordingly (one instruction = 4 clock cycles, so 1 MIPS at 4 MHz). The two-level hardware stack limits call depth to two nested subroutines - all but the most trivial firmware must use iterative coding or status-flag tricks to overcome this constraint.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the standalone manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16LC54AT-04/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 PIC16LC54AT-04/SO (cùng hình factor và footprint) — khác nhau ở Program Memory Size, Program Memory Type, RAM Size, Series, Timers.
PIC16LC54A-04/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LC54A-04I/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LC54A-04E/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LC54AT-04/SO Tỷ lệ tối đa & tính chất điện
| Core Processor | PIC |
| Core Size | 8-Bit |
| Series | PIC 16C |
| Tần số xung maksimum | 4 MHz |
| Program Memory Size | 768 B (512 x 12) |
| Program Memory Type | OTP (One-Time Programmable) |
| RAM Size | 25 x 8 B |
| Number of I/O Pins | 12 |
| Supply Voltage Range | 3 V to 6.25 V |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C |
| Hộp / Vỏ | 18-SOIC (0.295", 7.50 mm Width) |
| Kiểu lắp đặt | Surface Mount |
| Instruction Set Width | 12-bit |
| Data Path Width | 8-bit |
| Hardware Stack Depth | 2 levels |
| Timers | 1 x 8-bit (TMR0 with prescaler) |
| Oscillator Type | External |
Cấu hình chân PIC16LC54AT-04/SO
| Chân 1 | RA2 — PORTA bit 2 (bidirectional I/O) |
| Chân 2 | RA3 — PORTA bit 3 (bidirectional I/O) |
| Chân 3 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 4 | MCLR — Master Clear (active-low reset, must be tied to VDD) |
| Chân 5 | VSS — Ground reference |
| Chân 6 | RB0/INT — PORTB bit 0 / external interrupt input |
| Chân 7 | RB1 — PORTB bit 1 (bidirectional I/O) |
| Chân 8 | RB2 — PORTB bit 2 (bidirectional I/O) |
| Chân 9 | RB3 — PORTB bit 3 (bidirectional I/O) |
| Chân 10 | RB4 — PORTB bit 4 (bidirectional I/O) |
| Chân 11 | RB5 — PORTB bit 5 (bidirectional I/O) |
| Chân 12 | RB6 — PORTB bit 6 (bidirectional I/O) |
| Chân 13 | RB7 — PORTB bit 7 (bidirectional I/O) |
| Chân 14 | VDD — Positive supply (3.0 V to 6.25 V) |
| Chân 15 | OSC2/CLKOUT — Oscillator output / clock-out |
| Chân 16 | OSC1/CLKIN — Oscillator input / external clock in |
| Chân 17 | RA0 — PORTA bit 0 (bidirectional I/O) |
| Chân 18 | RA1 — PORTA bit 1 (bidirectional I/O) |
Ứng dụng tiêu biểu
PIC16LC54AT-04/SO phù hợp cho 6 Áp dụngs: Low-Cost Consumer Appliance Controller, IR Remote Control Transmitter, Industrial Sensor Signal Conditioning, Automotive Cabin Sub-System Controller, Smart Battery Charger Controller, Security Keypad / Access Reader.
Low-Cost Consumer Appliance Controller
The PIC16LC54AT-04/SO fits low-cost consumer appliances (toasters, coffee makers, hair dryers, fans) because its 4 MHz 1 MIPS throughput, 12 I/O pins and 3.0-6.25 V supply comfortably drive relay coils, triac gates, and 7-segment LED displays without external glue logic. With 768 B OTP and 25 B RAM the device hosts compact state-machine firmware for timing, sequencing, and button-debounce tasks, while the CMOS core keeps idle SLEEP current in the micro-amp range for energy-star standby budgets.
Được đề xuất
IR Remote Control Transmitter
The PIC16LC54AT-04/SO is widely used in 38 kHz / 40 kHz IR remote-control transmitters because its TMR0 timer with the 8-bit programmable prescaler easily generates the carrier frequency in software, and the 12-bit PIC16C5x instruction set packs NEC, RC5 and Sony protocols into 768 B of OTP memory. The wide 3.0-6.25 V supply lets the MCU run directly from two AAA cells, and the CMOS SLEEP mode with watchdog wake keeps idle battery drain under 5 uA for multi-year shelf life.
Được đề xuất
Industrial Sensor Signal Conditioning
The PIC16LC54AT-04/SO is used as a low-cost intelligent front-end for industrial sensors (temperature, humidity, level switches) where it digitizes analog inputs via its I/O pins with on-chip comparator support, applies linearization, and drives 4-20 mA or RS-485 line drivers. Its 4 MHz performance is sufficient for 100 Hz update rates, the 12 I/O pins handle both the sensor mux and the line interface, and the extended voltage range tolerates noisy 24 V industrial rails with simple resistor dividers.
Được đề xuất
Automotive Cabin Sub-System Controller
The PIC16LC54AT-04/SO (and its PIC16LC54A-04I/SO industrial-temp sibling) appears in automotive cabin sub-systems such as seat-controller switches, mirror-position memory, HVAC mode selectors, and interior lighting timers. Its CMOS design tolerates the noisy 12 V automotive supply via simple RC filtering, the 12 I/O pins read multi-position switches and drive LED indicators or small relays, and OTP memory locks the calibration so that warranty-station field returns cannot accidentally erase the trim values.
Được đề xuất
Smart Battery Charger Controller
The PIC16LC54AT-04/SO is suited to small NiMH / Li-ion charger controllers in cordless phones, power tools, and toy applications because its 3.0-6.25 V supply matches single-cell Li-ion packs and the 1 MIPS throughput is more than enough for the dV/dt charge-termination algorithm and LED status indication. TMR0 generates the charge-timer base, the 2-level stack is acceptable for the linear state-machine firmware, and SLEEP mode during idle extends standby time without burdening the battery.
Được đề xuất
Security Keypad / Access Reader
The PIC16LC54AT-04/SO powers low-cost security keypads and RFID-style access readers that read a 4x3 or 4x4 matrix keypad, debounce in software, compare a stored PIN in OTP, and drive a relay or buzzer on match. With 12 I/O the device directly scans a 4x3 matrix with one spare I/O for the relay; with 768 B OTP there is room for 8-character PIN storage plus 50-byte PIN-change routine; CMOS SLEEP plus the watchdog timer keeps standby current low enough for battery-backed operation.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LC54AT-04/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 | PIC16LC54A-04/SO | PIC16LC54A-04I/SO | PIC16LC54A-04E/SO |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-SOIC | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same |
| Core / Architecture | PIC 8-bit, 12-bit instructions | PIC 8-bit, 12-bit instructions | PIC 8-bit, 12-bit instructions | PIC 8-bit, 12-bit instructions |
| Max Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Program Memory | 768 B OTP (512 x 12) | 768 B OTP (512 x 12) | 768 B OTP (512 x 12) | 768 B OTP (512 x 12) |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C (industrial) | -40 C to +125 C (extended) |
| Number of I/O Pins | 12 | 12 | 12 | 12 |
| Packaging Form | Tape & Reel (T-suffix) | Tube (no T-suffix) | Tube or T&R by sub-suffix | Tube or T&R by sub-suffix |
Bảo phân biệt quan trọng
- Lowest-cost OTP PIC16C5X member in 18-SOIC (vsPIC16LC54A-04/SO (tube pack))
- Industrial temperature range as standard (vsPIC16LC54A-04E/SO)
- PIC16C5X heritage vs PIC16F Flash families (vsPIC16F54-I/SO)
Ghi chú thiết kế
Estimated: at VDD = 5.0 V, the PIC16LC54AT-04/SO draws approximately 2 mA active at 4 MHz and under 5 uA in SLEEP mode. Add a 100 nF decoupling capacitor within 5 mm of the VDD pin (pin 14) and a 10 uF bulk capacitor at the board supply input. MCLR (pin 4) must be tied to VDD through a 10 kohm resistor with a 100 nF cap to ground for clean power-on reset.
The PIC16C5X hardware stack is only 2 levels deep - subroutines deeper than one nested call will corrupt the return address. All production firmware must be coded iteratively or use a software-emulated stack in RAM. Also note that RA4 on PIC16C5X is an open-drain output; if driving a LED or external pull-up load, add an external pull-up resistor of 4.7 kohm to 10 kohm.
Place the 18-SOIC decoupling cap (100 nF X7R) within 5 mm of VDD pin 14. If using an external crystal or resonator, route the OSC1/OSC2 traces as short as possible (under 10 mm) and keep them away from switching traces to avoid injecting clock noise into adjacent analog sections. For high-noise industrial environments add a 100 ohm ferrite bead on the VDD rail feeding the MCU.
Thông tin tuân thủ
RoHS and REACH status not explicitly stated in the verified web data; lead-free is consistent with the Microchip packaging label. AEC-Q100 is not applicable for this non-automotive-qualified OTP MCU.
