PIC16C432-I/P - 8-Bit 20MHz OTP MCU with LIN Transceiver | Microchip
MPN: PIC16C432-I/P ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $5.2 | $520.00 |
| 500 | $4.65 | $2,325.00 |
| 1,000 | $4.1 | $4,100.00 |
PIC16C432-I/P Overview
An 8-bit microcontroller (MCU) is a single-chip computer containing a CPU, program memory (ROM/OTP/Flash), working RAM, I/O peripherals, and timers on one silicon die. PIC16C-series MCUs use Microchip's RISC Harvard-architecture core with a small instruction set (35 instructions in this case), enabling compact code and predictable execution timing. The hierarchy is: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. The PIC16C432 sits in the mid-range PIC® family (PIC16C5x is base; PIC16C6x/7x/8x/9x are mid-range).
Key features include 12 I/O pins, one 8-bit timer/counter with an 8-bit programmable prescaler, two analog comparators with a programmable on-chip voltage reference module, and an integrated LIN transceiver for single-wire automotive networking. The 200 ns instruction cycle at 20 MHz oscillator yields a 5 MIPS peak throughput. Code compression of approximately 2:1 over competing 8-bit MCUs reduces program-memory pressure for the 2K-word OTP array.
Typical applications include automotive body-control modules (door locks, window lifters, mirror controllers, seat adjusters), LIN slave nodes, HVAC panel controls, lighting controllers, low-end instrument-cluster sub-modules, and any 12 V automotive application that previously required a discrete LIN transceiver plus MCU.
When designing with PIC16C432-I/P, note that the 'C' (CMOS/OTP) variants are intended for prototype and low-volume production; for high-volume programs migrate to PIC16F432-I/P (Flash, reprogrammable). Ensure the LIN bus master provides the dominant-recessive arbitration; this part is intended as a LIN slave responder. The 20-pin PDIP footprint eases hand-soldering and breadboarding.
This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone. Pricing reflects market conditions as of 2026-09-16.
Drop-in alternatives for PIC16C432-I/P — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F432-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C432-20/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C432-20I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F432-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C432-04/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C432-04I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C432-I/P Maximum Ratings & Electrical Characteristics
| Product Type | 8-Bit Microcontroller (MCU) |
| Series | PIC® 16C |
| Core Architecture | PIC16 (RISC, Harvard) |
| Instruction Set | 35 instructions |
| Program Memory Size | 3.5 KB (2K x 14) OTP |
| RAM Size | 128 x 8 bytes |
| Maximum CPU Frequency | 20 MHz |
| Instruction Cycle Time | 200 ns |
| I/O Pins | 12 |
| Timers | 1 x 8-bit with 8-bit programmable prescaler |
| Analog Comparators | 2 (with programmable on-chip VREF) |
| Integrated LIN Transceiver | Yes (single-wire, LIN spec 1.x compliant) |
| Package / Case | 20-DIP (0.300 inch, 7.62 mm) |
| Mounting Type | Through-Hole |
| Operating Temperature Range | -40C to +85C (Industrial, 'I' suffix) |
| Oscillator Type | External |
| OTP | One-Time Programmable |
| Packaging | Tube |
PIC16C432-I/P Pin Configuration
| Pin 1 | RA2/AN2/VREFOUT — Port A bit 2 / Analog input 2 / Voltage Reference output |
| Pin 2 | RA3/AN3/CMP1/VREFIN — Port A bit 3 / Analog input 3 / Comparator 1 output / VREF input |
| Pin 3 | RA4/T0CKI/CMP2 — Port A bit 4 / Timer 0 clock input / Comparator 2 output |
| Pin 4 | MCLR/VPP/RA5/THV — Master Clear reset (active low) / Programming voltage / Port A bit 5 / Threshold voltage input |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — Port B bit 0 / External interrupt input |
| Pin 7 | RB1 — Port B bit 1 |
| Pin 8 | RB2 — Port B bit 2 |
| Pin 9 | RB3 — Port B bit 3 |
| Pin 10 | RB4 — Port B bit 4 |
| Pin 11 | RB5 — Port B bit 5 |
| Pin 12 | RB6 — Port B bit 6 |
| Pin 13 | RB7 — Port B bit 7 |
| Pin 14 | VDD — Positive supply voltage |
| Pin 15 | OSC2/CLKOUT — Oscillator crystal output / Clock output (FOSC/4) |
| Pin 16 | OSC1/CLKIN — Oscillator crystal input / External clock input |
| Pin 17 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| Pin 18 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| Pin 19 | LIN — LIN bus single-wire transceiver I/O |
| Pin 20 | VSS — Ground reference |
Typical Applications
PIC16C432-I/P is suitable for 6 applications: Automotive LIN Body-Control Modules, Automotive HVAC Panel Controls, Interior Lighting Controllers, Window Lift and Sunroof Modules, Door-Mirror Adjustment Modules, Industrial Sensor-Interface LIN Slaves.
Automotive LIN Body-Control Modules
The PIC16C432-I/P is purpose-built for automotive LIN (Local Interconnect Network) slave nodes, with an integrated single-wire LIN transceiver that eliminates the need for an external TJA1020 or similar physical-layer IC. The 3.5 KB OTP program memory and 128 bytes RAM are sufficient for door-module, window-lifter, mirror-controller, and seat-adjuster firmware that runs at 20 MHz with 200 ns instruction cycles. Its 12 I/O pins connect to relays, H-bridges, position sensors, and LED drivers typical of body-electronics loads, while the on-chip dual analog comparators with programmable VREF handle switch-debounce and threshold detection directly without external op-amps.
Recommended
Automotive HVAC Panel Controls
HVAC panel controllers require a low-pin-count, low-cost MCU with enough I/O for rotary encoders, push-buttons, LCD segment drivers, and backlight PWM. The PIC16C432-I/P delivers this with 12 I/O, a single 8-bit timer with 8-bit programmable prescaler for PWM backlight control, and two analog comparators for temperature-sensor threshold detection. Its integrated LIN transceiver allows the panel to communicate with the HVAC master controller on the vehicle's LIN bus without a separate physical-layer IC, reducing BOM cost in high-volume HVAC modules.
Recommended
Interior Lighting Controllers
Interior LED and incandescent lighting modules (dome lights, ambient lighting, footwell illumination, puddle lamps) need a small LIN-slave MCU with PWM capability and enough I/O for FET gate drives and switch inputs. The PIC16C432-I/P's 8-bit timer with programmable prescaler provides the PWM base, while the integrated LIN transceiver eliminates external bus-interface components. The 3.5 KB OTP memory holds fade-curve tables and diagnostic routines, and the industrial -40C to +85C temperature range handles under-dash and door-panel thermal environments.
Recommended
Window Lift and Sunroof Modules
Power-window and sunroof modules require anti-pinch control, H-bridge drive for the motor, end-of-travel sensing, and LIN connectivity to the body controller. The PIC16C432-I/P fits with 12 I/O pins for H-bridge FETs, Hall-sensor inputs, and direction-control logic. Its 20 MHz CPU executes the anti-pinch algorithm at 200 ns per instruction, the integrated analog comparators provide over-current detection, and the LIN transceiver reports module status to the body controller. The 20-pin PDIP package eases hand-soldering during prototyping and low-volume service-part production.
Recommended
Door-Mirror Adjustment Modules
Electric mirror controllers driving X/Y mirror motors, folding actuators, and heated-mirror elements require a small LIN-slave MCU. The PIC16C432-I/P's 12 I/O pins support mirror-select inputs, fold/unfold motor drive, X/Y position H-bridges, and heater FET control. The integrated LIN transceiver connects the module to the body controller without external bus ICs, the dual analog comparators with programmable VREF monitor motor current for stall detection, and the 3.5 KB OTP holds the position-calibration tables and fault-diagnostic routines.
Recommended
Industrial Sensor-Interface LIN Slaves
Industrial sensor-interface modules that communicate over LIN to a master controller (common in agricultural equipment, material-handling vehicles, and low-cost building automation) benefit from the PIC16C432-I/P's integrated LIN transceiver and analog comparators. The 12 I/O pins read digital switches and drive indicator LEDs, the dual comparators with programmable VREF handle analog thresholding of sensor outputs, and the 3.5 KB OTP stores calibration coefficients. The -40C to +85C industrial temperature range tolerates uncontrolled cabinet environments.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C432-I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F432-I/P | PIC16C432-20/P | PIC16C432-20I/P | PIC16C432-04/P | PIC16C432-04I/P |
|---|---|---|---|---|---|---|
| Package | 20-PDIP (0.300 inch) | 20-PDIP (0.300 inch) - same | 20-PDIP (0.300 inch) - same | 20-PDIP (0.300 inch) - same | 20-PDIP (0.300 inch) - same | 20-PDIP (0.300 inch) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 3.5 KB (2K x 14) OTP | 3.5 KB (2K x 14) Flash | 3.5 KB (2K x 14) OTP | 3.5 KB (2K x 14) OTP | 3.5 KB (2K x 14) OTP | 3.5 KB (2K x 14) OTP |
| Max CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 4 MHz | 4 MHz |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) |
| Integrated LIN Transceiver | Yes | Yes | Yes | Yes | Yes | Yes |
| Memory Type | OTP | Flash | OTP | OTP | OTP | OTP |
| I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 |
| Lifecycle Status | NRND | Active | NRND | NRND | NRND | NRND |
Key Differentiators
- Integrated LIN transceiver in a 20-pin MCU (vs PIC16F630-I/P)
- Same die, Flash reprogrammability (vs PIC16F432-I/P)
- Higher throughput at same package (vs PIC16C432-04/P)
Design Notes
PIC16C432-I/P is in NRND status and stock is constrained; for new designs migrate to PIC16F432-I/P (Flash, pin-compatible) to avoid last-time-buy scenarios. Existing production programs should perform a lifecycle risk assessment and qualify the F variant as a second source. Estimated input: this design note is based on the NRND flag in Microchip product records as of 2026-09-16, not on a datasheet figure.
The integrated LIN transceiver on PIC16C432-I/P requires a master-pull-up resistor (typically 30 kOhm to VSUP or 1 kOhm in master mode) and a reverse-battery protection diode on the LIN pin. For automotive applications, place a TVS diode (e.g., SMAJ24CA) close to the LIN connector to meet ISO 7637-2 transient immunity. The on-chip VREF module used with the analog comparators should be bypassed with a 100 nF ceramic capacitor to VSS within 5 mm of the VREFOUT pin.
Route the LIN trace as a short, direct connection to the connector with no stubs; keep LIN trace impedance to 30-60 ohm characteristic impedance and place the LIN pull-up/master resistor within 10 mm of the PIC16C432 LIN pin. Decouple VDD with a 100 nF ceramic capacitor placed within 3 mm of the VDD pin, and use a wide ground pour under the package for thermal dissipation. The OSC1/OSC2 traces should be kept short and surrounded by ground to minimize EMI radiation from the 20 MHz fundamental.
PIC16C432-I/P operates from VDD with the analog and digital sections sharing a common rail. For 12V-battery automotive applications, use a 5V LDO (such as MCP1700 or Microchip's MIC29150) to derive VDD from VBAT. Estimated: at 20 MHz CPU and 5V VDD, the typical IDD is approximately 10-15 mA active and <5 uA sleep; verify against the DC characteristics section of the datasheet before finalizing the power budget. Place a bulk 10 uF + 100 nF decoupling pair at the LDO output close to the MCU VDD pin.
Compliance Information
RoHS and lead-free compliant per Microchip product page. AEC-Q100 qualification not formally listed; the integrated LIN transceiver is designed for automotive body-electronics but the specific Q100 grade is not stated in the public datasheet excerpt.
