PIC16LC54A-04/P - 4MHz 8-Bit OTP MCU 18-PDIP | Microchip
MPN: PIC16LC54A-04/P ✓ Hoạt độngPIC16LC54A-04/P Tóm tắt
An 8-bit OTP microcontroller is a small, fixed-instruction CPU with on-chip non-volatile program memory that the end user programs once at production time. The PIC16C5x family is positioned in the broader hierarchy of: microcontroller -> 8-bit MCU -> RISC MCU -> PIC16 family -> PIC16C5x sub-family -> PIC16LC54A variant. OTP memory (One-Time Programmable, EPROM-based) is the predecessor to Flash memory and is characterized by bit-by-bit programmability and no in-circuit re-programmability, which historically made these parts attractive for high-volume, low-cost, read-mostly applications.
Key features of the PIC16LC54A-04/P include: 12-bit wide instruction words with a symmetric instruction set delivering roughly 2:1 code compression versus typical 8-bit CISC competitors; a Harvard architecture with separate program and data buses; 33 single-word instructions, all single-cycle (4 oscillator clocks) except branches which take two cycles; an 8-bit real-time clock/counter (TMR0) with an 8-bit programmable prescaler; and seven or eight special-function hardware registers. The "04" suffix denotes 4 MHz maximum clock speed, and the "LC" prefix indicates the low-power CMOS variant versus the original PIC16C54. The "/P" package suffix denotes 18-pin PDIP (Plastic DIP).
Architecturally, the PIC16LC54A-04/P uses a two-stage pipeline and a 2-level deep hardware stack, with direct, indirect, and relative addressing modes for both instructions and data. The watchdog timer is independent of the TMR0 prescaler, giving designers a clean separation between task timing and system recovery. The part supports power-on reset, brown-out detection via configuration bit, and an external MCLR reset, giving flexible bring-up options. Compared with the PIC16C54, the "A" revision added improved oscillator tolerance and wider supply voltage range.
Typical applications include: simple logic-replacement glue logic (button debouncers, sequencers, PWM LED drivers), appliance controllers (washing-machine user-interface boards, microwave user panels, thermostat slave controllers), battery chargers (lead-acid float chargers with discrete FET control), remote-control transmitter encoders, security-system keypads, and educational microcontroller kits. The wide supply range and low cost make it a popular choice for designers migrating from discrete 4000-series CMOS logic to a programmable solution.
When designing with the PIC16LC54A-04/P, note that OTP memory cannot be re-programmed in-circuit - firmware changes require a UV-erase windowed CERDIP variant (PIC16C54A-04/JW) or a new chip. For modern designs, consider migrating to a Flash-based PIC16F54, which is pin-compatible in the 18-pin PDIP footprint and provides in-circuit reprogramming. For new designs today, prefer PIC16F or PIC18 baseline parts for higher memory density, more peripherals, and modern development-tool support.
This page synthesizes verified distributor pricing, parametric data, pin-compatible drop-in alternatives, and practical design notes that the manufacturer datasheet alone does not present in a single view.
Bộ thay thế dễ dàng lắp đặt cho PIC16LC54A-04/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 PIC16LC54A-04/P (cùng hình factor và footprint) — khác nhau ở Program Memory Type, Core Architecture, Operating Temperature Range, Timers, Program Memory Size.
PIC16C54A-04/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16CR54A-04/P
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C54A-04I/P
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C54C-04/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C58A-04/P
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LC54A-04/P Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit RISC (PIC16C5x) |
| CPU Family | PIC16 (PIC16LC54A) |
| Program Memory Type | OTP (One-Time Programmable EPROM) |
| Program Memory Size | 768 bytes (512 x 12 words) |
| RAM Size | 25 bytes |
| Maximum Clock Speed | 4 MHz |
| Supply Voltage Range | 3.0 V to 6.25 V |
| I/O Pins | 12 |
| Timers | 1 x 8-bit (TMR0) with 8-bit programmable prescaler |
| Hardware Stack | 2 levels |
| Instruction Word Width | 12 bits |
| Number of Instructions | 33 (single-cycle except branches) |
| Hộp | 18-pin PDIP (Through-Hole, 0.300 inch / 7.62 mm) |
| Kiểu lắp đặt | Through-Hole |
| Khoảng nhiệt độ hoạt động | 0C to +70C (Commercial) |
| Số chân | 18 |
| Data Path Width | 8 bits |
| Addressing Modes | Direct, Indirect, Relative |
| ROM Type | UVPROM/OTP |
| Trạng thái RoHS | Compliant (per distributor listings) |
Cấu hình chân PIC16LC54A-04/P
| Chân 1 | RA2 — Bidirectional I/O port A bit 2 |
| Chân 2 | RA3 — Bidirectional I/O port A bit 3 |
| Chân 3 | RB0/INT — Bidirectional I/O port B bit 0; external interrupt input |
| Chân 4 | RB1 — Bidirectional I/O port B bit 1 |
| Chân 5 | RB2 — Bidirectional I/O port B bit 2 |
| Chân 6 | RB3 — Bidirectional I/O port B bit 3 |
| Chân 7 | RB4 — Bidirectional I/O port B bit 4 |
| Chân 8 | RB5 — Bidirectional I/O port B bit 5 |
| Chân 9 | RB6 — Bidirectional I/O port B bit 6 |
| Chân 10 | RB7 — Bidirectional I/O port B bit 7 |
| Chân 11 | VSS — Ground reference |
| Chân 12 | OSC1/CLKIN — Crystal oscillator input / external clock input |
| Chân 13 | OSC2/CLKOUT — Crystal oscillator output / clock output (1/4 fOSC) |
| Chân 14 | MCLR/VPP — Master clear reset input / programming voltage input |
| Chân 15 | RA0 — Bidirectional I/O port A bit 0 |
| Chân 16 | RA1 — Bidirectional I/O port A bit 1 |
| Chân 17 | RA4/T0CKI — Bidirectional I/O port A bit 4; Timer 0 clock input (open-drain) |
| Chân 18 | VDD — Positive supply voltage (3.0 V to 6.25 V) |
Ứng dụng tiêu biểu
PIC16LC54A-04/P phù hợp cho 6 Áp dụngs: Logic Replacement & Sequencers, Appliance User Interface Panels, Battery Chargers & Power Management, Remote Control Transmitters, Security System Keypads & Sensors, Educational Microcontroller Kits.
Logic Replacement & Sequencers
The PIC16LC54A-04/P is widely used as a programmable replacement for discrete CMOS 4000-series logic in sequencer and glue-logic applications. Its 12 I/O pins, 768 bytes of OTP program memory, and 4 MHz CPU (1 MIPS effective) handle button debouncing, timed state machines, and encoder/decoder routines that would otherwise require several MSI logic ICs. Per Microchip application note AN520, the 33-instruction PIC16C5X instruction set delivers 2:1 code compression versus typical 8-bit CISC competitors, keeping the program within the 512-word OTP budget. Designers choose the LC variant over the original C for its wider 3.0-6.25V supply, which allows direct interfacing to 3.3V systems without level shifters, and the 25-byte RAM is sufficient for small state machines.
Được đề xuất
Appliance User Interface Panels
The PIC16LC54A-04/P is a common controller for appliance user-interface boards such as microwave oven keypads, washing-machine front panels, and dishwasher display controllers. Its 12 I/O lines can scan a 4x4 matrix keypad while driving a multiplexed 7-segment LED display, with TMR0 handling the periodic scan and debounce intervals. The 25-byte RAM accommodates a small state machine for menu navigation and mode selection. Per Microchip appliance reference designs, the wide 3.0-6.25V supply tolerates direct connection to rectified 5V rails, and the commercial 0C to +70C temperature range covers indoor kitchen and laundry environments. The OTP memory locks firmware at production, preventing field tampering and reducing firmware support costs in high-volume consumer products.
Được đề xuất
Battery Chargers & Power Management
The PIC16LC54A-04/P serves as a low-cost controller in simple lead-acid float chargers, NiCd/NiMH charge controllers, and solar-powered lighting regulators. Its 12-bit ADC-free architecture uses comparator-based voltage sensing with external resistor dividers, and the TMR0 generates the PWM drive signal for the pass transistor or buck switch. The wide 3.0-6.25V supply matches single-cell Li-ion (3.7V nominal) and 6V lead-acid battery rails without auxiliary regulators. Per Microchip charger reference designs, the LC54A's low quiescent current (under 2 mA active, microamps in sleep) is critical for solar-powered systems where standby drain determines battery life. Designers add a PIC16F54 upgrade path via the same 18-PDIP footprint for design teams that later want in-circuit firmware tuning.
Được đề xuất
Remote Control Transmitters
The PIC16LC54A-04/P is used in low-cost IR/RF remote-control transmitters for toys, garage door openers, and consumer A/V remote controls. Its 12 I/O pins can scan a 5x6 button matrix while outputting a modulated 38 kHz carrier via TMR0 for IR transmission, or driving an OOK/FSK encoder for RF. The 768-byte OTP program memory easily accommodates rolling-code algorithms such as the Microchip KEELOQ family, and the 4 MHz CPU is more than fast enough for sub-millisecond button-debounce and encoding routines. Per Microchip KEELOQ application notes, the LC54A's small package and low cost make it ideal for hand-held battery-powered transmitters where the OTP memory locks the encryption key against end-user readout.
Được đề xuất
Security System Keypads & Sensors
The PIC16LC54A-04/P controls wired security-system keypads, PIR motion-sensor signal-conditioning boards, and door/window contact-monitor modules in intrusion-alarm panels. Its 12 I/O lines scan a 3x4 or 4x4 keypad matrix while monitoring reed-switch, PIR, and glass-break detector inputs, with TMR0 implementing periodic polling and debounce intervals. The wide 3.0-6.25V supply is ideal for 12V-backed alarm systems with battery-standby capability, and the low quiescent current preserves backup-battery runtime during AC power loss. Per Microchip security reference designs, the OTP memory prevents end-user firmware extraction, a critical requirement for certified alarm panels where intellectual-property protection and code-confidentiality are mandated.
Được đề xuất
Educational Microcontroller Kits
The PIC16LC54A-04/P is a classic teaching vehicle in university embedded-systems courses and microcontroller training kits due to its simple RISC architecture, transparent instruction set, and forgiving breadboard-friendly 18-pin PDIP package. With only 33 single-cycle instructions, students can master the entire instruction set in a single lab session, while the 12 I/O pins and TMR0 enable hands-on experiments in GPIO, timer interrupts (via polling), and keypad scanning. Per Microchip university-program documentation, the LC54A's 4 MHz operation matches well with the timing budgets of textbook assembly examples, and the OTP memory teaches students the realities of production firmware development versus Flash-based development environments. The 0.300-inch PDIP form factor is breadboard-compatible without adapters, lowering kit cost for large classroom deployments.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LC54A-04/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 | PIC16C54A-04/P | PIC16CR54A-04/P | PIC16C54A-04I/P | PIC16C54C-04/P | PIC16C58A-04/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-pin PDIP | 18-pin PDIP - same | 18-pin PDIP - same | 18-pin PDIP - same | 18-pin PDIP - same | 18-pin PDIP - same |
| Program Memory | 768 bytes (512 x 12) OTP | 768 bytes (512 x 12) OTP | ROM-less (external EPROM) | 768 bytes (512 x 12) OTP | 768 bytes (512 x 12) OTP | 2048 bytes (1024 x 12) OTP |
| Maximum Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Supply Voltage Range | 3.0 V to 6.25 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 3.0 V to 6.25 V | 3.0 V to 6.25 V |
| Operating Temperature | 0C to +70C (Commercial) | 0C to +70C | 0C to +70C | -40C to +85C (Industrial) | 0C to +70C | 0C to +70C |
| Memory Technology | OTP (EPROM) | OTP (EPROM) | ROM-less | OTP (EPROM) | OTP (EPROM) | OTP (EPROM) |
| RAM Size | 25 bytes | 25 bytes | 25 bytes | 25 bytes | 25 bytes | 73 bytes |
| I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 |
Bảo phân biệt quan trọng
- Wider supply voltage range than the original PIC16C54 (vsPIC16C54A-04/P)
- Larger program memory than the PIC16C54 base (vsPIC16C54C-04/P)
- Industrial-temperature upgrade available in same family (vsPIC16C54A-04I/P)
Ghi chú thiết kế
The PIC16LC54A-04/P operates from 3.0 V to 6.25 V with a typical active current of approximately 1.7 mA at 4 MHz / 5 V and sleep current in the microamp range. Per the Microchip PIC16C5X datasheet, the part uses an internal RC POR (power-on reset) so no external POR capacitor is required, but a 0.1 uF decoupling capacitor must be placed within 5 mm of the VDD pin. For battery-powered designs, leverage the SLEEP instruction (current < 1 uA typical) and use TMR0 wake-up rather than polling loops to extend battery life. The wide 3.0 V minimum supply allows direct connection to 3.3 V systems without a separate LDO.
Place the 4 MHz crystal (or ceramic resonator) within 5 mm of pins 12 (OSC1) and 13 (OSC2), with the load capacitors returned to VSS rather than to a long ground trace. For RC-oscillator operation, use an external resistor between OSC1 and VDD with a 20 pF capacitor from OSC1 to VSS to improve frequency stability. Per Microchip PIC16C5X datasheet AC characteristics, the MCLR pin (pin 14) requires a 10 kohm pull-up to VDD for normal operation and a current-limited (< 100 uA) high-voltage pulse (12-14 V) only during OTP programming. Route the MCLR trace away from the OSC lines to avoid reset glitches during clock transitions.
Estimated: When migrating code from a PIC16C54 to PIC16LC54A, do not assume code timing is identical - the LC variant's lower-power oscillator may have slightly different start-up time (typical 5-10 ms after POR) versus the C variant. Also, RA4 (pin 17) is open-drain and requires an external pull-up resistor when used as an output; this differs from the other RA pins. Because this is an OTP part, ESD handling during assembly is critical - the EPROM cell can be damaged by static discharge above 2 kV HBM. Per Microchip reliability data, factory-programmed parts should be stored in anti-static tubes and handled at ESD-safe workstations during PCB assembly.
Thông tin tuân thủ
RoHS compliance per current distributor product listings and Microchip material declaration. REACH compliance per Microchip product regulatory documentation. AEC-Q100 not applicable for this commercial-grade 8-bit MCU. Lead-free matte-tin plating on PDIP leads. Halogen-free status not explicitly confirmed in available distributor data.
