PIC16LC54A-04/SS - 8-bit 4MHz 768B OTP MCU SSOP-20 | Microchip
MPN: PIC16LC54A-04/SS ✓ Hoạt độngPIC16LC54A-04/SS Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripheral I/O on one die. Within the broader hierarchy, the PIC16LC54A belongs to: microcontroller -> embedded controller -> semiconductor -> integrated circuit. The "LC" suffix indicates a low-power CMOS variant, the "54A" identifies the specific memory/peripheral subset, and the "/SS" suffix denotes the SSOP-20 surface-mount package. The PIC16C5X family pioneered Microchip's baseline 8-bit RISC architecture with a 12-bit instruction word and a 33-instruction set, providing deterministic execution for simple control loops.
Key features include an RISC CPU core executing most instructions in a single 1 µs instruction cycle (at 4 MHz oscillator), a watchdog timer for reliable unattended operation, a programmable 8-bit prescaler shared with the watchdog, and power-saving SLEEP mode. The 12 I/O pins can source/sink up to 25 mA per pin and 100 mA total, suitable for direct LED or relay drive. The OTP program memory supports in-circuit programming via Microchip's ICSP interface, although traditional windowed CERDIP variants are also available for UV erasure.
Typical applications include appliance controls, automotive sub-system modules, security and alarm panels, simple sensor signal conditioning, and battery-powered consumer products. The wide 3.0 V to 6.25 V supply range supports both 3.3 V and 5 V rails, while the low-power CMOS process enables low quiescent current draw in SLEEP mode for battery-backup designs.
When designing with this device, consider migrating to the flash-based PIC16F54 drop-in for higher-volume production where field re-programmability is required. Ensure the MCLR pin is properly biased and that in-circuit serial programming (ICSP) header access is provided on the PCB for firmware upgrades during prototyping.
Bộ thay thế dễ dàng lắp đặt cho PIC16LC54A-04/SS — 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/SS (cùng hình factor và footprint) — khác nhau ở Package, Program Memory Size, Watchdog Timer, Core Architecture, Program Memory Type.
PIC16F54-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC54A-04I/SS
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C54A-04/SS
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16LV54A-04/SS
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F505-I/SS
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LC54A-04/SS Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit PIC RISC |
| Family | PIC16C5X |
| CPU Clock Speed | 4 MHz |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 768 B (512 x 12) |
| RAM Size | 25 B |
| I/O Pins | 12 |
| Điện áp cung cấp | 3.0 V to 6.25 V |
| Hộp | SSOP-20 |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | 0 C to +70 C (Commercial) |
| Instruction Set | 33 instructions, 12-bit wide |
| Instruction Cycle | 1 us at 4 MHz |
| I/O Sink/Source per Pin | 25 mA |
| Total I/O Current | 100 mA |
| Watchdog Timer | Yes, with shared 8-bit prescaler |
| Power-Saving Mode | SLEEP mode |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16LC54A-04/SS
| Chân 1 | MCLR — Master Clear (reset) input, active low |
| Chân 2 | RA0 — Port A bit 0, bidirectional digital I/O |
| Chân 3 | RA1 — Port A bit 1, bidirectional digital I/O |
| Chân 4 | RA2 — Port A bit 2, bidirectional digital I/O |
| Chân 5 | RA3 — Port A bit 3, bidirectional digital I/O |
| Chân 6 | RA4/OSC2/CLKOUT — Port A bit 4 / oscillator output / clock out |
| Chân 7 | OSC1/CLKIN — Oscillator input / external clock in |
| Chân 8 | RB0 — Port B bit 0, bidirectional digital I/O |
| Chân 9 | RB1 — Port B bit 1, bidirectional digital I/O |
| Chân 10 | RB2 — Port B bit 2, bidirectional digital I/O |
| Chân 11 | RB3 — Port B bit 3, bidirectional digital I/O |
| Chân 12 | RB4 — Port B bit 4, bidirectional digital I/O |
| Chân 13 | RB5 — Port B bit 5, bidirectional digital I/O |
| Chân 14 | RB6 — Port B bit 6, bidirectional digital I/O |
| Chân 15 | RB7 — Port B bit 7, bidirectional digital I/O |
| Chân 16 | VSS — Ground reference |
| Chân 17 | VDD — Positive supply voltage (3.0-6.25V) |
| Chân 18 | T0CKI/RC0 — Timer 0 clock input / Port C bit 0 |
| Chân 19 | RC1 — Port C bit 1, bidirectional digital I/O |
| Chân 20 | RC2 — Port C bit 2, bidirectional digital I/O |
Ứng dụng tiêu biểu
PIC16LC54A-04/SS phù hợp cho 6 Áp dụngs: Consumer Appliance Control, Battery-Powered Sensor Modules, Security Alarm Panel Logic, Simple LED Lighting Controller, Automotive Sub-System Modules, Industrial Control Panel I/O.
Consumer Appliance Control
The PIC16LC54A-04/SS fits appliance control PCBs where cost dominates and firmware is fixed at production. With 768B OTP program memory and a 33-instruction RISC core at 4 MHz, it executes typical 500-instruction control loops in under 1 ms, sufficient for washing-machine, microwave, and rice-cooker timing logic. Its 12 GPIO with 25 mA sink/source directly drive relay coils, seven-segment LEDs, and triac gates, eliminating external driver transistors. The 3.0-6.25 V supply tolerates rectified 5 V rails without LDO regulation, simplifying the SMPS design and reducing BOM cost. Pairing with a PIC16F54 drop-in allows identical PCB layout for both low-volume OTP and high-volume flash production runs.
Được đề xuất
Battery-Powered Sensor Modules
The PIC16LC54A-04/SS suits battery-powered sensor modules thanks to its low-power CMOS "LC" process and SLEEP mode drawing only microampere-level current. Operating voltage of 3.0-6.25 V supports both 3.3 V Li-ion and two-cell alkaline sources without level shifters. The 12 I/O lines connect to thermistor dividers, PIR sensors, and reed switches directly, while the on-chip watchdog timer wakes the MCU periodically for sub-microamp average current. The 4 MHz internal execution provides fast burst-mode processing, then returns to SLEEP for 99.9% duty cycle idle, extending coin-cell battery life to years in metering and security sensor products.
Được đề xuất
Security Alarm Panel Logic
The PIC16LC54A-04/SS provides reliable logic control for security alarm panels where 12 zone inputs, simple decision firmware, and low cost matter. With 25 bytes RAM and 768B OTP, it handles zone-state scanning, entry/exit delays, and siren-trigger logic without external memory. The 25 mA per-pin drive directly powers piezo sirens and LED indicators without driver chips. SLEEP mode plus watchdog keeps quiescent current minimal when the panel is armed, while 4 MHz execution responds to alarm events within 1 µs. Commercial temperature grade 0 C to +70 C fits indoor installation environments.
Được đề xuất
Simple LED Lighting Controller
The PIC16LC54A-04/SS drives LED lighting controllers for decorative and architectural fixtures, where PWM dimming and pattern sequences are fixed. With 12 I/O pins, multiple LED channels are multiplexed via Charlieplexing or external MOSFETs to drive RGB strips at 25 mA per pin. The 4 MHz CPU generates PWM frequencies above 100 Hz with no perceptible flicker. OTP memory locks the firmware preventing unauthorized pattern modification. The wide 3.0-6.25 V supply accepts 5 V USB or 3.3 V regulated rails, while commercial temperature grade suits indoor fixtures.
Được đề xuất
Automotive Sub-System Modules
The PIC16LC54A-04I/SS industrial-grade variant serves non-safety automotive sub-systems like seat controllers, mirror adjusters, and accessory timers. Operating temperature of -40 C to +85 C handles under-dash and interior cabin environments. With 768B OTP memory, fixed-function firmware is locked in production, eliminating field tampering. 12 I/O drive motor bridges via external MOSFETs for window lift and seat positioning, with 25 mA per-pin capability interfacing directly to logic-level gate drivers. Note: this part is not AEC-Q100 qualified, so for safety-critical ADAS applications, Microchip recommends PIC16F18446 or dsPIC33 families.
Được đề xuất
Industrial Control Panel I/O
The PIC16LC54A-04/SS acts as a low-cost I/O expander and sequencer in industrial control panels. With 12 GPIO, it reads pushbuttons, selector switches, and indicator lamps while sequencing relay outputs for pump, fan, or heater control. The 4 MHz RISC core scans inputs and updates outputs in under 100 µs, sufficient for human-machine interface response times. OTP firmware locks the control logic preventing unauthorized program changes in factory automation. Pairing with a watchdog supervisor IC ensures reliable unattended operation, while commercial temperature range suits indoor control cabinets.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LC54A-04/SS — 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 | PIC16F54-I/SS | PIC16LC54A-04I/SS | PIC16C54A-04/SS | PIC16LV54A-04/SS | PIC16F505-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SSOP-20 | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same |
| Program Memory Type | OTP EPROM (768 B) | Flash (512 B) | OTP EPROM (768 B) | OTP EPROM (768 B) | OTP EPROM (768 B) | Flash (1.5 KB) |
| CPU Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz (max) |
| Supply Voltage Range | 3.0 V to 6.25 V | 2.0 V to 5.5 V | 3.0 V to 6.25 V | 3.0 V to 6.0 V | 2.0 V to 3.8 V | 2.0 V to 5.5 V |
| Operating Temperature | 0 C to +70 C (Commercial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | 0 C to +70 C (Commercial) | 0 C to +70 C (Commercial) | -40 C to +85 C (Industrial) |
| I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 |
| RAM Size | 25 B | 25 B | 25 B | 25 B | 25 B | 72 B |
Bảo phân biệt quan trọng
- Drop-in flash upgrade path within same SSOP-20 package (vsPIC16F54-I/SS)
- Wider supply voltage range than standard PIC16C54A (vsPIC16C54A-04/SS)
- Industrial temperature grade option in same package (vsPIC16LC54A-04I/SS)
Ghi chú thiết kế
Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of pin 17, and add a bulk 10 µF tantalum or aluminum electrolytic capacitor on the same rail. The PIC16LC54A-04/SS draws up to 2 mA active at 4 MHz and 5 V, so the rail must sustain voltage during I/O switching transients. For battery-powered designs, add a series ferrite bead to suppress noise from relay coils.
MCLR (pin 1) must never float - tie to VDD through a 10 kohm pull-up, with a 100 nF capacitor to ground for noise immunity. Floating MCLR causes intermittent resets in electrically noisy environments. For ICSP programming, expose MCLR, RB6 (PGC), and RB7 (PGD) on a 0.1 inch header so firmware can be programmed after PCB assembly. Note that OTP parts cannot be re-programmed or erased.
Keep the 4 MHz crystal or ceramic resonator traces to OSC1 (pin 7) and OSC2 (pin 6) short and symmetric to minimize stray capacitance. Ground the metal pad under the SSOP-20 thermal pad to a low-impedance ground plane for EMI suppression. Route RA4-RA0 and RB0-RB7 traces away from the oscillator to avoid coupling noise into the GPIO logic.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - choose PIC16F18446 or PIC16F88 family for automotive. Halogen-free status not specified in provided data.
