PIC16C54A-10I/P - 8-Bit 10MHz OTP MCU 12 I/O 18-PDIP | Microchip
MPN: PIC16C54A-10I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.5 | $1.50 |
| 10 | $1.45 | $14.50 |
| 100 | $1.35 | $135.00 |
| 500 | $1.25 | $625.00 |
| 1,000 | $1.15 | $1,150.00 |
PIC16C54A-10I/P Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data memory, and peripheral I/O on a single silicon die. The PIC16C5X family uses a RISC-style Harvard architecture with 12-bit-wide instructions and an 8-bit data path, enabling predictable single-cycle instruction execution for most opcodes and minimal deterministic interrupt latency. Positioned within Microchip's hierarchy, the PIC16C54A belongs to the 8-bit PIC microcontroller -> microcontroller -> embedded controller -> semiconductor category, serving entry-level control tasks distinct from higher-tier 16-bit and 32-bit PIC families.
Key features include a 4.5 V to 5.5 V single-supply operating range, two-level deep hardware stack, direct/indirect/relative addressing modes, and an 8-bit real-time clock/counter (TMR0). The OTP program memory allows factory or user programming with a standard PIC programmer, while the 12-bit instruction width yields ~2:1 code compression over typical 8-bit CISC MCUs of the same class. Industrial temperature range (-40C to +85C) supports deployments beyond commercial office environments.
Architecturally, the PIC16C54A employs a simplified 14-bit instruction subset compared with later PIC16F/16C6X/16C7X families, with seven or eight special function hardware registers visible to user code. The 33-instruction set delivers deterministic single-cycle execution for most opcodes except branches, which take two cycles. A hardware multiply and divide are not available in this baseline; arithmetic-intensive tasks should be evaluated against newer PIC16F54 or PIC16F57 flash replacements that offer higher speed and in-system reprogrammability.
Typical applications include low-cost appliance timer controls, simple sensor interface boards, hobbyist and maker projects, replacement of discrete logic in glue logic consolidation, and industrial indicator panels. The through-hole PDIP-18 footprint is preferred for breadboarding, educational kits, and legacy designs where through-hole assembly remains desirable.
When designing with the PIC16C54A, ensure a regulated 5 V supply within the 4.5 V to 5.5 V window and verify that oscillator selection matches the 10 MHz specification. OTP memory cannot be erased, so production code must be fully validated on UV-erasable (PIC16C54A JW windowed) prototypes before committing to OTP parts.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, application design notes, and industrial-grade considerations not found in the standalone datasheet - reducing design-cycle time for engineers migrating from OTP PIC16C5X designs to flash-based replacements.
Drop-in alternatives for PIC16C54A-10I/P — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC16C54A-10I/P (same form factor and footprint) — differing in Package, Program Memory Type, Mounting Type, Program Memory Size, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F54-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C54A-10/P
✅ Drop-In✓ In Stock
$0.98 / Unit
View Datasheet →PIC16C54A-04/P
✅ Drop-In✓ In Stock
$3.75 / Unit
View Datasheet →PIC16C54-10I/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.18 / Unit
View Datasheet →PIC16C54-10E/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.72 / Unit
View Datasheet →PIC16C54A-10I/P Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit Microcontroller (MCU) |
| Series | PIC16C5X (PIC16C54A) |
| Core Architecture | 8-bit RISC Harvard |
| Instruction Width | 12-bit |
| Data Path Width | 8-bit |
| Maximum Clock Frequency | 10 MHz |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 768 bytes (512 x 12) |
| RAM Size | 25 bytes |
| I/O Pins | 12 |
| Timers | 1 x 8-bit (TMR0) |
| Hardware Stack Depth | 2 levels |
| Supply Voltage | 4.5 V to 5.5 V |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| Package | 18-pin PDIP (DIP-18, 0.300 in / 7.62 mm row spacing) |
| Mounting Type | Through-Hole |
PIC16C54A-10I/P Pin Configuration
| Pin 1 | RA2 — Bidirectional I/O port A bit 2 |
| Pin 2 | RA3 — Bidirectional I/O port A bit 3 |
| Pin 3 | RA4/T0CKI — Bidirectional I/O port A bit 4 / Timer0 clock input |
| Pin 4 | MCLR — Master Clear reset input (active low) |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — Bidirectional I/O port B bit 0 / External interrupt input |
| Pin 7 | RB1 — Bidirectional I/O port B bit 1 |
| Pin 8 | RB2 — Bidirectional I/O port B bit 2 |
| Pin 9 | RB3 — Bidirectional I/O port B bit 3 |
| Pin 10 | RB4 — Bidirectional I/O port B bit 4 |
| Pin 11 | RB5 — Bidirectional I/O port B bit 5 |
| Pin 12 | RB6 — Bidirectional I/O port B bit 6 |
| Pin 13 | RB7 — Bidirectional I/O port B bit 7 |
| Pin 14 | VDD — Positive supply (4.5 V to 5.5 V) |
| Pin 15 | OSC2/CLKOUT — Oscillator output / Clock output (crystal mode) |
| Pin 16 | OSC1/CLKIN — Oscillator input / External clock input |
| Pin 17 | RA0 — Bidirectional I/O port A bit 0 |
| Pin 18 | RA1 — Bidirectional I/O port A bit 1 |
Typical Applications
PIC16C54A-10I/P is suitable for 6 applications: Appliance Timer Controller, Hobbyist and Educational MCU Trainer, Industrial Indicator Panel Controller, Sensor Interface Front-End Board, Discrete Logic Replacement (Glue Logic Consolidation), Automotive Aftermarket Accessory Controller (Non-Safety).
Appliance Timer Controller
The PIC16C54A-10I/P fits appliance timer controllers thanks to its 12 digital I/O pins, 10 MHz deterministic instruction rate, and 25 bytes of RAM that are sufficient for simple countdown state machines. In a washing-machine or microwave-oven timer board, the MCU drives multiplexed seven-segment LED or LCD displays, scans user keypad inputs, and toggles TRIAC control outputs via optocouplers, replacing dozens of discrete CMOS/TTL logic ICs. The 4.5-5.5 V supply aligns with standard 5 V regulator rails, and the 10 MIPS peak throughput ensures debounced key response under 50 ms. OTP memory provides anti-clone protection desirable in consumer white-goods production.
Recommended
Hobbyist and Educational MCU Trainer
The PIC16C54A-10I/P is well-suited for hobbyist and educational MCU trainers because its 18-pin PDIP footprint plugs directly into standard 0.300-inch breadboards and IC sockets. With only 33 instructions in the baseline PIC16C5X set, students learn RISC fundamentals, TMR0 timing, and GPIO control without the complexity of later peripherals like ADC or PWM. The 10 MHz clock supports real-time LED-blinking exercises at human-visible rates, while the 768-byte OTP memory constrains project scope to small algorithms (e.g., dice simulators, traffic-light controllers, simple tone generators). Industrial temperature tolerance prevents classroom lab failures.
Recommended
Industrial Indicator Panel Controller
Industrial indicator panels benefit from the PIC16C54A-10I/P because its 12 I/O pins can drive status LEDs, scan key inputs, and refresh multiplexed numeric displays without external logic. The -40C to +85C industrial temperature grade tolerates factory-floor environments, and the deterministic single-cycle RISC execution (10 MHz, ~2.5 MIPS) ensures button-press debounce and alarm-state transitions complete in well under 10 ms. OTP program memory prevents unauthorized code extraction at deployed sites. Low cost and long-term Microchip supply make this part attractive for OEM control panels, conveyor-belt status boards, and process-line annunciators.
Recommended
Sensor Interface Front-End Board
The PIC16C54A-10I/P serves as a sensor interface front-end in distributed sensing networks, where its 12 I/O pins read multiple discrete switch contacts, thermistor dividers, or optocoupler-isolated inputs and serialize them over a UART or one-wire link to a central controller. Its 25-byte RAM and 8-bit TMR0 support simple event-counting and elapsed-time measurement; the 10 MHz clock delivers adequate throughput for polled sensor sampling at 1 kHz per channel. The 5 V supply rail simplifies integration with 4-20 mA loop-powered transducers, and OTP memory ensures that proprietary calibration constants cannot be reverse-engineered from the chip.
Recommended
Discrete Logic Replacement (Glue Logic Consolidation)
The PIC16C54A-10I/P excels at discrete-logic replacement tasks where 4-8 standard 74-series TTL/CMOS ICs (gates, flip-flops, counters, decoders) can be consolidated into one programmable device. Engineers designing state machines for vending-machine coin acceptors, security-panel keypads, or arcade-game button interfaces can implement the same logic in PIC assembly, reducing PCB area, BOM count, and assembly cost. The 10 MIPS throughput and 12-bit instruction compression mean typical glue-logic functions run an order of magnitude faster than discrete implementations, while OTP code prevents cloning by competitors.
Recommended
Automotive Aftermarket Accessory Controller (Non-Safety)
For non-safety automotive aftermarket products like interior LED accent controllers, RGB underbody light drivers, and aftermarket alarm chirpers, the PIC16C54A-10I/P offers sufficient I/O and processing headroom. The 12 I/O pins drive MOSFET gate drivers for LED strings, scan mode-selector switches, and trigger solid-state relays. The industrial temperature grade (-40C to +85C) covers most cabin and under-hood deployments, although true under-hood AEC-Q100 applications should select an automotive-qualified MCU. OTP memory secures the proprietary light-show patterns against easy copy.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C54A-10I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F54-I/P | PIC16C54A-10/P | PIC16C54A-04/P | PIC16C54-10I/P | PIC16C54-10E/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | PDIP-18 (0.300 in) | PDIP-18 (0.300 in) - same | PDIP-18 (0.300 in) - same | PDIP-18 (0.300 in) - same | PDIP-18 (0.300 in) - same | PDIP-18 (0.300 in) - same |
| Core / Architecture | 8-bit RISC, 12-bit instructions | 8-bit RISC, 14-bit instructions | 8-bit RISC, 12-bit instructions | 8-bit RISC, 12-bit instructions | 8-bit RISC, 12-bit instructions | 8-bit RISC, 12-bit instructions |
| Max Clock Frequency | 10 MHz | 20 MHz (+100%) | 10 MHz (same) | 4 MHz (-60%) | 10 MHz (same) | 10 MHz (same) |
| Program Memory | 768 B OTP | 1 K word Flash (reprogrammable) | 768 B OTP | 768 B OTP | 768 B OTP | 768 B OTP |
| RAM Size | 25 B | 25 B | 25 B | 25 B | 25 B | 25 B |
| I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 |
| Supply Voltage | 4.5 V to 5.5 V | 2.0 V to 5.5 V (wider) | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Operating Temperature | -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) | -40 C to +125 C (Extended) |
Key Differentiators
- Industrial temperature grade in same footprint (vs PIC16C54A-10/P)
- Full 10 MHz performance vs derated alternative (vs PIC16C54A-04/P)
- 10 MHz OTP vs flash alternative's voltage flexibility (vs PIC16F54-I/P)
Design Notes
Provide a regulated 4.5-5.5 V supply to Vdd (pin 14) with a 100 nF decoupling capacitor placed within 5 mm of the package pin. The PIC16C54A-10I/P's Vdd pin is adjacent to I/O pin RB7 (pin 13) on the PDIP-18 package, so route the +5 V trace directly from the regulator output to Vdd pin 14 with the bypass cap on the Vdd side. Add a bulk 10 uF electrolytic or tantalum on the regulator output if the supply is shared with relays or solenoids to suppress MCU reset glitches.
OTP program memory on the PIC16C54A-10I/P cannot be erased or rewritten; a single programming error permanently bricks the part. Validate firmware on the windowed ceramic PIC16C54A JW variant before committing to OTP production parts. Also note the MCLR reset pin (pin 4) is active-low and must be pulled high through a 10 kohm resistor; leaving it floating causes intermittent resets. The two-level hardware stack means ISR-nested code deeper than two calls will corrupt the return address - keep call depth shallow or migrate to PIC16F54 with its deeper stack.
For 10 MHz operation, place the crystal or ceramic resonator within 10 mm of the OSC1 (pin 16) and OSC2 (pin 15) pins and connect the load capacitors (typically 15-33 pF) directly to ground at the respective pins. Keep the oscillator traces short and surrounded by a ground pour to minimize EMI pickup on these high-impedance nodes. Route all I/O traces away from the oscillator area, and place a 4.7 kohm pull-up on MCLR (pin 4) for reliable reset behavior across the full -40C to +85C temperature range.
Compliance Information
RoHS-compliant per Microchip product page. Not AEC-Q100 qualified; do not use in safety-critical automotive deployments. Lead-free matte-tin plating.
