PIC16C54T-10/SO - 8-bit OTP MCU, 768B, 12 I/O, 10MHz SOIC-18
MPN: PIC16C54T-10/SO ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.33 | $3.33 |
| 10 | $3.1 | $31.00 |
| 100 | $2.75 | $275.00 |
| 500 | $2.4 | $1,200.00 |
| 1,000 | $2.05 | $2,050.00 |
PIC16C54T-10/SO Overview
An 8-bit microcontroller (MCU) is a single-chip computer that combines a CPU, program memory, data RAM, and peripheral I/O on one silicon die. Within the broader hierarchy, an MCU sits below microprocessors and above discrete logic; the PIC16C5x family further specializes as a baseline, OTP-based architecture optimized for simple state-machine replacement and legacy designs. The 'C' in the part number denotes the CMOS process, '54' identifies the specific family variant, 'T' indicates tape-and-reel packaging, '10' specifies the 10 MHz maximum oscillator frequency, and 'SO' marks the SOIC-18 package option.
Key specifications include 12 I/O pins capable of sourcing/sinking up to 25 mA per pin (suitable for direct LED drive), an operating voltage range of 2.5 V to 6.25 V over the commercial temperature grade, and a two-stack, 12-bit instruction word RISC architecture that delivers roughly 5 MIPS at 10 MHz. The device integrates a Power-On Reset (POR), Device Reset Timer (DRT), and a Watchdog Timer (WDT) with its own on-chip RC oscillator for reliable brown-out recovery without external components.
The architecture features a Harvard-style separate code and data bus, 33 single-word/12-bit instructions, and a two-level deep hardware stack. The OTP (one-time-programmable) EPROM cell means firmware is programmed once and cannot be field-updated, which makes this part suited for high-volume production where code stability is paramount and field reprogramming is unnecessary.
Typical applications include appliance control boards, simple sensor interfaces, remote-control transmitters, fan/light controllers, and white-goods user-interface modules. The 25-byte RAM suits it for shallow loops such as button debounce, pulse counting, and PWM-driven motor timing rather than complex protocol stacks.
When designing with the PIC16C54T-10/SO, note that the SOIC-18 package is the surface-mount counterpart to the PDIP-18 footprint. Engineers migrating from the legacy ceramic-window JW part need to verify that code previously developed for the JW device maps to the OTP memory map of the SO variant without modification.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet, helping sourcing engineers evaluate PIC16C54 family availability and second-source risk.
Drop-in alternatives for PIC16C54T-10/SO — 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 PIC16C54T-10/SO (same form factor and footprint) — differing in Program Memory Type, Program Memory Size, Package, Core Architecture, RAM Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C54-10/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.02 / Unit
View Datasheet →PIC16C54C-04/SO
✅ Drop-In✓ In Stock
$1.38 / Unit
View Datasheet →PIC16C54A-20/SO
✅ Drop-In✓ In Stock
$1.4 / Unit
View Datasheet →PIC16C54CT-20I/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.95 / Unit
View Datasheet →PIC16C54T-10E/SO
✅ Drop-In✓ In Stock
$0.12 / Unit
View Datasheet →PIC16C54T-10/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC RISC |
| Family | PIC16C5x (PIC16C54) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 768 bytes (0.75 KB) |
| RAM Size | 25 bytes |
| Number of I/O Pins | 12 |
| Maximum Clock Frequency | 10 MHz |
| Instruction Set Width | 12 bits |
| Number of Instructions | 33 |
| Hardware Stack Depth | 2 levels |
| Supply Voltage Range | 2.5 V to 6.25 V |
| Operating Temperature Range | 0C to +70C (commercial) |
| Package Type | SOIC-18 (SO), 7.50 mm body width |
| Mounting Type | Surface Mount |
| Peripherals | POR, DRT, Watchdog Timer (WDT) |
PIC16C54T-10/SO Pin Configuration
| Pin 1 | RA2 — Port A bit 2 (digital I/O) |
| Pin 2 | RA3 — Port A bit 3 (digital I/O) |
| Pin 3 | RA4/RTCC — Port A bit 4 / RTCC timer input |
| Pin 4 | VDD — Positive supply voltage (2.5V to 6.25V) |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0 — Port B bit 0 (digital I/O) |
| Pin 7 | RB1 — Port B bit 1 (digital I/O) |
| Pin 8 | RB2 — Port B bit 2 (digital I/O) |
| Pin 9 | RB3 — Port B bit 3 (digital I/O) |
| Pin 10 | RB4 — Port B bit 4 (digital I/O) |
| Pin 11 | RB5 — Port B bit 5 (digital I/O) |
| Pin 12 | RB6 — Port B bit 6 (digital I/O) |
| Pin 13 | RB7 — Port B bit 7 (digital I/O) |
| Pin 14 | VSS — Ground reference |
| Pin 15 | OSC1 — Oscillator input / crystal connection |
| Pin 16 | OSC2 — Oscillator output / crystal connection |
| Pin 17 | RA0 — Port A bit 0 (digital I/O) |
| Pin 18 | RA1 — Port A bit 1 (digital I/O) |
Typical Applications
PIC16C54T-10/SO is suitable for 6 applications: Appliance Control Boards, Remote Control Transmitters, Fan and Light Controllers, Simple Sensor Interfaces, LED Display Drivers, White Goods User Interface Modules.
Appliance Control Boards
The PIC16C54T-10/SO fits washing-machine, dishwasher, and microwave user-interface boards where fixed firmware drives keypads, seven-segment displays, and relay outputs. Its 768 bytes of OTP program memory comfortably holds the simple state machines typical of appliance UI logic, while the 12 I/O pins directly multiplex 4x4 button matrices and digit drivers without external glue logic. The 10 MHz clock provides adequate headroom for multiplexed display refresh and button debounce loops running concurrently. Compared to a discrete logic implementation, the PIC16C54T-10/SO reduces the BOM count by integrating the CPU, RAM, oscillator, and POR/DRT/WDT supervision into a single SOIC-18 device.
Recommended
Remote Control Transmitters
Infrared and RF remote-control transmitters benefit from the PIC16C54T-10/SO's 25-byte RAM and 10 MHz throughput, which can sustain carrier generation and protocol encoding for RC5, NEC, or proprietary IR formats. The 12 I/O pins accommodate multiple button inputs plus a PWM output for the IR LED driver, while the integrated Watchdog Timer recovers the device from brown-out events that occur when batteries are inserted under load. With only 768 bytes of code space, developers must code tightly, but the simple 33-instruction RISC architecture makes assembly programming straightforward for low-power handheld designs.
Recommended
Fan and Light Controllers
Wall-mounted fan-speed and dimmer controllers use the PIC16C54T-10/SO to read rotary-encoder or push-button inputs and generate phase-angle or PWM control signals for triac and MOSFET drivers. The 10 MHz instruction rate provides the resolution needed for smooth dimming curves, while the 12-bit instruction width keeps the firmware compact even with lookup tables for logarithmic brightness response. The integrated Power-On Reset (POR) and Device Reset Timer (DRT) ensure deterministic startup after mains interruptions, which is a critical safety requirement for AC-line-attached controllers.
Recommended
Simple Sensor Interfaces
The PIC16C54T-10/SO serves as a low-cost ADC-free sensor interface for thermistor, photodiode, and switch-based sensors in industrial monitoring nodes. Engineers can bit-bang RC-discharge timing on any I/O pin to convert resistance to a digital value, then transmit the result via UART or one-wire protocols using timer-driven software routines. The 25-byte RAM supports rolling averages and threshold hysteresis without overflowing, while the SOIC-18 package fits easily alongside the sensor footprint on compact PCBs. For battery-powered sensor nodes, the PIC16C54T-10/SO's low-power sleep modes extend operating life on a single coin cell.
Recommended
LED Display Drivers
Seven-segment and dot-matrix LED displays driven by the PIC16C54T-10/SO benefit from its 25 mA per-pin drive capability, eliminating external transistor arrays for many small-display designs. The 10 MHz throughput multiplexes 4 to 8 digits at refresh rates above 100 Hz, well above the flicker-fusion threshold of the human eye. Multiplexing reduces the I/O count required from 64 (8 digits x 8 segments) down to 16, which the PIC16C54T-10/SO's 12 I/O pins cannot fully cover alone but can handle with a simple external shift register like the 74HC595. The compact OTP footprint ensures consistent brightness in volume production where firmware drift is unacceptable.
Recommended
White Goods User Interface Modules
Refrigerator, oven, and washer user-interface modules rely on the PIC16C54T-10/SO to scan capacitive or mechanical keypads and drive LCD or LED indicators plus buzzer feedback. The 12 I/O pins handle up to a 3x4 button matrix with dedicated lines for status LEDs and the alarm transducer, while the Watchdog Timer guards against lockups caused by ESD events common on appliance control panels. The industrial temperature option PIC16C54T-10E/SO supports the -40C to +125C range required for oven-door and refrigerator-compartment electronics. With only 768 bytes of code, developers must optimize state-transition tables, but the simple instruction set keeps assembly development time low.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C54T-10/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C54-10/SO | PIC16C54C-04/SO | PIC16C54A-20/SO | PIC16C54CT-20I/SO | PIC16C54T-10E/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-18 (SO) | SOIC-18 (SO) - same | SOIC-18 (SO) - same | SOIC-18 (SO) - same | SOIC-18 (SO) - same | SOIC-18 (SO) - same |
| Max Clock Frequency | 10 MHz | 10 MHz | 4 MHz (-60%) | 20 MHz (+100%) | 20 MHz (+100%) | 10 MHz |
| Program Memory | 768 bytes OTP | 768 bytes OTP | 768 bytes OTP | 768 bytes OTP | 768 bytes OTP | 768 bytes OTP |
| RAM Size | 25 bytes | 25 bytes | 25 bytes | 25 bytes | 25 bytes | 25 bytes |
| Number of I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 |
| Temperature Grade | 0C to +70C (commercial) | 0C to +70C | 0C to +70C | 0C to +70C | -40C to +85C (industrial) | -40C to +125C (extended) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Key Differentiators
- Balanced 10 MHz speed grade for mainstream 8-bit control (vs PIC16C54C-04/SO)
- Commercial temperature grade is the baseline option (vs PIC16C54T-10E/SO)
- Compact 768-byte OTP fits the smallest fixed-code designs (vs PIC16C54CT-20I/SO)
- Tape-and-reel packaging for high-volume SMT assembly (vs PIC16C54-10/SO)
Design Notes
The PIC16C54T-10/SO operates from a 2.5 V to 6.25 V single supply and integrates a Power-On Reset (POR) plus Device Reset Timer (DRT). Decouple VDD (pin 4) with a 100 nF ceramic capacitor placed within 5 mm of the pin, and bulk-decouple with a 10 uF electrolytic if the supply is shared with motors or relays. The POR threshold is fixed internally, so external reset ICs are unnecessary in most designs; however, designs exposed to slow-rising supplies (battery insertion) should verify that VDD rise time meets the datasheet's tDRT specification before relying on the internal reset.
The SOIC-18 package has a thermal resistance of approximately 80 C/W (theta_JA, still-air), which is acceptable for the PIC16C54T-10/SO's typical 5 mA active supply current at 5 V (25 mW dissipation). At maximum operating temperature of 70 C ambient, junction temperature stays below 72 C, well within the 150 C maximum. For high-density designs where the SOIC-18 sits near heat sources (triacs, voltage regulators), add a small copper pour on the VDD pin and route ground directly to pin 14 to spread heat through the PCB.
Place the oscillator crystal or resonator as close as possible to pins 15 (OSC1) and 16 (OSC2), keeping the trace length under 5 mm to minimize stray capacitance. Use a ground guard ring around the oscillator pins and route digital signal traces away from OSC2 to avoid coupling noise into the timing reference. For the SOIC-18 footprint, follow IPC-7351 land pattern recommendations with 0.55 mm pad width and 1.27 mm pitch; ensure the land pattern tolerates both 7.50 mm and 7.50 mm body widths for supplier flexibility.
Do not assume that firmware written for the PIC16C54A or PIC16C54C will run unchanged on the original PIC16C54 silicon: the 'C' and 'A' revisions added enhancements to the option register and I/O behavior that the original 16C54 lacks. Always consult the PIC16C5x errata and revision history before migrating code between sub-families. Additionally, the OTP memory cannot be reprogrammed in-circuit, so production units must ship with verified firmware or be scrapped if programming fails.
When using RB0-RB7 as outputs to drive LEDs or relays directly, ensure that the total package dissipation does not exceed 800 mW. Each I/O pin sinks up to 25 mA, but driving all 12 pins simultaneously at 25 mA exceeds the package's thermal budget at elevated temperatures. Distribute high-current loads across multiple pins or use external drivers if more than 8 outputs must switch simultaneously. For EMI-sensitive applications, place a small ferrite bead on the VDD trace near the IC and add a 10 ohm series resistor on each output driving long cables.
Compliance Information
Compliance certifications not present in the verified distributor data; consult Microchip's PIC16C5x material declaration documents for definitive RoHS/REACH/lead-free status. The part is obsolete, so original Microchip compliance certificates may no longer be actively maintained.
