PIC16C54-LP/SS - 8-bit OTP MCU, 768B, 12 I/O, SSOP-20 | Microchip
MPN： PIC16C54-LP/SS ✗ 停產PIC16C54-LP/SS 概覽
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, I/O peripherals, and clock generation into one package. The PIC16C5X family belongs to the broader category of microcontrollers, which sit inside the semiconductor hierarchy as programmable logic devices used to implement embedded control functions. The "LP" suffix designates the low-power oscillator mode, which pairs with a 32 kHz watch crystal for ultra-low standby current, while "SS" denotes the SSOP (Shrink Small Outline Package) form factor.
Key features include a two-level hardware stack, direct/indirect/relative addressing modes, an 8-bit real-time counter (TMR0), power-on reset, watchdog timer, and code protection. The PIC16C5X architecture delivers roughly an order-of-magnitude higher performance than competing MCUs in the same price tier, according to the manufacturer datasheet.
Typical applications include low-cost embedded control nodes, appliance timers, battery-powered sensor interfaces, simple motor controllers, and remote-control transmitters. The wide 3.0V-6.0V supply range and LP oscillator mode make it well suited for energy-constrained applications drawing microamp-level standby currents.
When designing with the PIC16C54-LP/SS, note that OTP (One-Time Programmable) memory cannot be erased, so development typically begins with the windowed JW-package variant before committing to the production SSOP OTP device. Program with the MPLAB PM3 Universal Device Programmer.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not consolidated on the manufacturer datasheet or individual distributor listings.
直接替換替代品，適用於 PIC16C54-LP/SS — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC16C54-LP/SS （相同外形與佔位） — 差異在於 Package, Program Memory Size, Timers, Core Architecture, Watchdog Timer.
PIC16C54C-04/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16C54A-04/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16C54-10/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16C54C-20E/SS
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16C54CT-04/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16C54-LP/SS 最大額定值與電氣特性
| Core Architecture | PIC 8-bit RISC |
| Family | PIC16C5X |
| Program Memory Size | 768 bytes (OTP EPROM, 512 x 12) |
| RAM Size | 25 bytes |
| I/O Pins | 12 |
| 供應電壓 | 3.0 V to 6.0 V |
| Maximum Clock Speed (LP mode) | 40 kHz |
| Instruction Set | 33 single-word/single-cycle instructions |
| Instruction Width | 12-bit |
| Stack Depth | 2 levels (hardware) |
| Timers | 1 x 8-bit (TMR0) |
| Oscillator Mode (LP) | Low-power crystal (32 kHz typical) |
| Watchdog Timer | Yes |
| 封裝 | 20-pin SSOP (5.30 mm width) |
| 安裝類型 | Surface Mount |
| Lead Free / RoHS | Compliant (per Heisener listing) |
PIC16C54-LP/SS 腳位配置
| 腳位 1 | RA2 — Bidirectional I/O port A bit 2 |
| 腳位 2 | RA3 — Bidirectional I/O port A bit 3 |
| 腳位 3 | RTCC — RTCC input / RA4 shared pin |
| 腳位 4 | MCLR — Master clear reset input |
| 腳位 5 | VSS — Ground reference |
| 腳位 6 | RB0 — Bidirectional I/O port B bit 0 |
| 腳位 7 | RB1 — Bidirectional I/O port B bit 1 |
| 腳位 8 | RB2 — Bidirectional I/O port B bit 2 |
| 腳位 9 | RB3 — Bidirectional I/O port B bit 3 |
| 腳位 10 | RB4 — Bidirectional I/O port B bit 4 |
| 腳位 11 | RB5 — Bidirectional I/O port B bit 5 |
| 腳位 12 | RB6 — Bidirectional I/O port B bit 6 |
| 腳位 13 | RB7 — Bidirectional I/O port B bit 7 |
| 腳位 14 | VSS — Ground reference |
| 腳位 15 | OSC2 — Oscillator crystal output (LP mode: 32 kHz) |
| 腳位 16 | OSC1 — Oscillator crystal input (LP mode: 32 kHz) |
| 腳位 17 | RA0 — Bidirectional I/O port A bit 0 |
| 腳位 18 | RA1 — Bidirectional I/O port A bit 1 |
| 腳位 19 | NC — Not connected (per datasheet) |
| 腳位 20 | VDD — Positive supply (3.0V to 6.0V) |
典型應用
PIC16C54-LP/SS 適用於 7 應用s: Battery-Powered Remote Control Transmitter, Appliance Timer / Delay Relay, Low-Cost Sensor Interface Node, Simple Stepper / DC Motor Controller, Automotive Interior Lamp Timer, Electronic Toy and Game Logic, Industrial Counter / Tachometer Front End.
Battery-Powered Remote Control Transmitter
The PIC16C54-LP/SS fits battery-powered remote controls because its LP oscillator mode pairs with a 32 kHz watch crystal to deliver microamp-level standby current, while the 12 I/O pins drive keypad scan matrices and RF encoder lines. Its 3.0V-6.0V supply range accepts 2-3 alkaline or lithium cells directly without a boost regulator. The 33-instruction RISC core executes each opcode in a single cycle, keeping the active current low during button-press bursts. Compared with newer PIC16F54 flash parts, the OTP-only PIC16C54-LP/SS is preferred where code-extraction resistance matters more than in-field reprogrammability.
推薦
Appliance Timer / Delay Relay
The PIC16C54-LP/SS is well suited to appliance timer modules where it controls a relay or TRIAC after a preset delay, because its 8-bit TMR0 with prescaler provides flexible timing intervals and the 768-byte OTP memory holds lookup tables for several preset durations. The 12 I/O lines drive seven-segment displays, status LEDs, and zero-cross detectors simultaneously. Industrial washing machines, dishwashers, and HVAC zone controllers routinely use this family for under-$1 BOM cost. The wide 3.0V-6.0V supply range tolerates rectified mains-derived rails with minimal regulation.
推薦
Low-Cost Sensor Interface Node
Sensor-interface nodes that wake periodically, read an analog or digital sensor, and transmit a coded burst benefit from the PIC16C54-LP/SS LP oscillator mode, which holds the CPU in microamp-level sleep between measurements while still allowing quick wake via watchdog or external interrupt. The 25-byte RAM accommodates small scratch buffers for averaging, and the 12 I/O pins handle SPI sensor chips, LEDs, and a UART-style one-wire output. Typical deployments include weather stations, irrigation soil-moisture probes, and wireless HVAC duct sensors. The 3.0V minimum supply lets the part run directly from a single lithium cell down to its end-of-life voltage.
推薦
Simple Stepper / DC Motor Controller
Stepper and small brushed-DC motor controllers fit the PIC16C54-LP/SS because the 12 I/O pins directly drive dual H-bridges or stepper coils, while TMR0 generates the commutation timing. The single-cycle RISC core keeps phase jitter low at low RPM, which matters for smooth torque in 3D-printer axis drives or valve actuators. Most legacy designs run the part at 4 MHz XT mode for commutation rates above 1 kHz, with the LP mode reserved for standby parking. The 33-instruction core is small enough to certify quickly for safety-critical motion paths.
推薦
Automotive Interior Lamp Timer
The PIC16C54-LP/SS is a fit for automotive interior lamp and accessory delay-off timers, because the LP oscillator mode keeps standby draw below typical automotive quiescent-current budgets when the ignition is off. The 12 I/O pins drive relay coils, monitor door-switch inputs, and blink courtesy lamps via TMR0 interrupts. The OTP memory prevents aftermarket firmware tampering, which designers appreciate for warranty and regulatory reasons. Always migrate to AEC-Q100 qualified PIC16C54C-04E/SS for under-hood or safety-relevant automotive applications.
推薦
Electronic Toy and Game Logic
The PIC16C54-LP/SS has been a workhorse for electronic toys and educational game modules because the 33-instruction RISC core is straightforward for junior firmware developers to learn, while the 12 I/O pins drive LEDs, sound chips, and button matrices without external logic. The 768-byte OTP memory holds several game routines plus a randomized-play table. Cost-sensitive toy makers favor OTP over flash to deter cloning. Typical battery life exceeds 100 hours from a pair of AA cells because the LP oscillator keeps sleep current at microamp levels.
推薦
Industrial Counter / Tachometer Front End
Factory-floor counters and tachometer front ends benefit from the PIC16C54-LP/SS because TMR0 captures pulse trains from Hall-effect or optical sensors while the 12 I/O lines multiplex seven-segment displays and BCD-output drivers. The 2-level hardware stack is sufficient for simple interrupt-driven counting, and the 25-byte RAM holds debounce and BCD-conversion scratchpads. The 3.0V-6.0V supply tolerates 24V industrial rails after a single zener drop. Migration to PIC16C54C-04I/P is recommended for new industrial designs needing 4 MHz clock and active production status.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16C54-LP/SS — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC16C54C-04/SS | PIC16C54A-04/SS | PIC16C54-10/SS |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-SSOP (5.30 mm) | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same |
| Lifecycle Status | NRND | Active | Active | NRND |
| Max Clock Frequency | 40 kHz (LP mode) | 4 MHz | 4 MHz | 10 MHz |
| Program Memory | 768 B (512 x 12 OTP) | 768 B (512 x 12 OTP) | 768 B (512 x 12 OTP) | 768 B (512 x 12 OTP) |
| RAM | 25 B | 25 B | 25 B | 25 B |
| I/O Pins | 12 | 12 | 12 | 12 |
| Supply Voltage | 3.0 V to 6.0 V | 3.0 V to 6.0 V | 3.0 V to 6.0 V | 3.0 V to 6.0 V |
主要差異化特點
- True low-power LP oscillator mode optimized for 32 kHz watch crystals (對比PIC16C54C-04/SS)
- Single-cycle RISC core delivers deterministic instruction timing (對比PIC16C54-10/SS)
- Compact 20-pin SSOP package with 12 I/O pins (對比PIC16F54-I/P)
設計說明
The PIC16C54-LP/SS LP oscillator mode draws microamp-level standby current when paired with a 32 kHz watch crystal on OSC1/OSC2. Estimated: at VDD = 3.0V, oscillator only, the part typically pulls < 15 uA idle current per Microchip PIC16C5X datasheet figures. Add bulk decoupling (10 uF electrolytic + 0.1 uF ceramic) close to the VDD pin to suppress the inrush that occurs when the part exits sleep via watchdog timeout.
Because PIC16C54-LP/SS uses OTP (one-time-programmable) EPROM, code cannot be erased after programming - any code bug requires a new device. Always develop firmware on the JW (windowed) ceramic package variant first, then commit to the production SSOP OTP device once code is verified. Per Microchip application note TB016, OTP write timing requires VDD within 4.5V-5.5V during programming; use MPLAB PM3 to enforce this.
Place the 32 kHz watch crystal and its load capacitors (typically 33 pF) within 5 mm of the OSC1/OSC2 pins to minimize parasitic capacitance that detunes the LP oscillator. Route MCLR with a 10 kohm pull-up to VDD and a 100 nF cap to ground for clean reset behavior. Per Microchip PIC16C5X datasheet section on oscillator design, keep crystal traces short and away from switching signals to avoid frequency jitter.
合規資訊
RoHS compliant per Heisener listing and Microchip product page. Not AEC-Q100 qualified - choose PIC16C54C-04E/SS (extended temp grade) for automotive-adjacent applications. NRND lifecycle limits long-term production support.
