PIC16C432T-I/SS - 8-Bit OTP MCU + LIN Transceiver | 20-SSOP
MPN: PIC16C432T-I/SS β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.85 | $38.50 |
| 100 | $3.5 | $350.00 |
| 500 | $3.1 | $1,550.00 |
| 1,000 | $2.75 | $2,750.00 |
PIC16C432T-I/SS Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory, working RAM, and configurable peripheral blocks. Within the embedded hierarchy, the PIC16C432 sits in the 8-bit mid-range PIC family, above 6-/8-pin baseline PIC10/PIC12 devices but below the 16-bit dsPIC/PIC24 and 32-bit PIC32 families. The integrated LIN (Local Interconnect Network) transceiver places this MCU in the automotive body-electronics tier, where it bridges low-speed in-vehicle networks without requiring an external transceiver IC.
Key features of the PIC16C432 include an integrated LIN transceiver compliant with LIN 1.2/1.3 physical layer requirements, a 35-instruction RISC core with single-cycle execution (200 ns at 20 MHz, branches two-cycle), a programmable watchdog timer, a 10-bit analog-to-digital converter, and two analog comparators. It also offers an internal 4 MHz RC oscillator and an external oscillator option for greater timing accuracy.
Architecturally, the device combines a Harvard-style RISC engine, an OTP program store, and an on-die LIN physical layer, reducing BOM count versus discrete MCU-plus-transceiver designs. The CMOS process yields low quiescent current suitable for battery-connected automotive nodes. The 20-SSOP footprint measures 5.30 mm wide (0.209 inch) and 7.20 mm long, easing integration into space-constrained body modules.
Typical applications include automotive LIN slaves (door modules, seat controllers, mirror switches, HVAC dampers), body-electronics sensor nodes, industrial keypad/wheel interfaces, and low-cost appliance control. The on-chip LIN transceiver removes the need for an external TJA1020 or MC33660, lowering BOM cost and PCB area.
When designing with this part, note that OTP memory cannot be reprogrammed in-circuit; for prototypes requiring firmware iteration, consider the PIC16F432 (Flash) sibling or windowed CERDIP PIC16C432 for UV erasure. The industrial (-40 C to +85 C) temperature grade suits most passenger-compartment body electronics but not under-hood applications.
Drop-in alternatives for PIC16C432T-I/SS β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16C432T-E/SS
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16C432-I/SS
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16F432-I/SS
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16C432T-20/SS
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16LF432-I/SS
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16C432T-I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM | 128 x 8 bytes |
| CPU Speed | 20 MHz |
| Instruction Cycle | 200 ns (single cycle) |
| Instruction Set | 35 instructions |
| I/O Pins | 12 |
| Supply Voltage | 3.0 V to 5.5 V |
| Integrated LIN Transceiver | Yes |
| Package | 20-SSOP (0.209 inch, 5.30 mm width) |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Mounting Type | Surface Mount |
PIC16C432T-I/SS Pin Configuration
| Pin 1 | LIN β LIN bus physical layer input/output |
| Pin 2 | VSS β Ground reference |
| Pin 3 | VDD β Positive supply voltage (3.0-5.5 V) |
| Pin 4 | OSC1/CLKIN β External oscillator input or clock input |
| Pin 5 | OSC2/CLKOUT β External oscillator output or clock output |
| Pin 6 | RA0/AN0 β Digital I/O / analog input |
| Pin 7 | RA1/AN1 β Digital I/O / analog input |
| Pin 8 | RA2/AN2 β Digital I/O / analog input |
| Pin 9 | RA3/AN3 β Digital I/O / analog input |
| Pin 10 | RA4/T0CKI β Digital I/O / Timer0 clock input |
| Pin 11 | RA5/MCLR β Digital I/O / Master Clear (reset) |
| Pin 12 | RB0/INT β Digital I/O / external interrupt |
| Pin 13 | RB1 β Digital I/O |
| Pin 14 | RB2 β Digital I/O |
| Pin 15 | RB3 β Digital I/O |
| Pin 16 | RB4 β Digital I/O |
| Pin 17 | RB5 β Digital I/O |
| Pin 18 | RB6 β Digital I/O |
| Pin 19 | RB7 β Digital I/O |
| Pin 20 | VSS β Ground reference |
Typical Applications
PIC16C432T-I/SS is suitable for 7 applications: Automotive LIN Slave Nodes, Door Module / Window Lift Control, HVAC Damper and Blower Control, Industrial Sensor / Keypad Interfaces, Low-Cost Appliance Control, Automotive Seat and Mirror Control, Body Electronics Switch Panels.
Automotive LIN Slave Nodes
The PIC16C432T-I/SS is purpose-built for automotive LIN (Local Interconnect Network) slave applications because its integrated LIN physical-layer transceiver removes the need for an external TJA1020/MC33660 device. At 20 MHz CPU clock and 200 ns instruction cycle, the MCU handles LIN 1.2/1.3 frame parsing and slave task scheduling in real time. The 12 GPIO pins are adequate for switch-matrix scanning, LED driver control, and PWM-driven motor actuation. The 3.5 KB OTP program memory stores LIN node capability and configuration descriptors, while 128 bytes of RAM accommodates LIN frame buffers. Industrial -40 C to +85 C temperature grade meets passenger-compartment ECU requirements, and the 20-SSOP package (5.30 mm body width) fits inside compact door modules, seat controllers, and mirror switch assemblies.
Recommended
Door Module / Window Lift Control
Automotive door modules combine mirror adjustment, window lift, lock actuation, and switch-matrix scanning, all of which fit the PIC16C432T-I/SS resource budget. The integrated LIN transceiver communicates slave status to the body controller without an additional PHY IC, reducing BOM cost. The MCU's 12 GPIO pins drive H-bridge enable lines, Hall-sensor inputs, and indicator LEDs via PWM, while the 200 ns instruction cycle provides deterministic debounce and motor control loop timing. With 3.5 KB OTP memory the firmware stores node configuration and diagnostics, and the industrial temperature grade suits under-mirror installations. The 20-SSOP footprint mounts comfortably on the small PCB of a door-module carrier.
Recommended
HVAC Damper and Blower Control
In HVAC climate-control modules the PIC16C432T-I/SS serves as a LIN slave commanding servo-driven air-mix dampers and blower speeds. The integrated LIN transceiver streams actuator position back to the HVAC controller, while the 20 MHz CPU executes PID loops for flap positioning within tight latency windows. 12 GPIOs drive bipolar stepper or DC servo interfaces, and the 128-byte RAM keeps actuator state tables without taxing the OTP program store. The 3.0-5.5 V supply aligns with 5 V automotive rails, and the SSOP-20 footprint eases routing on cramped HVAC control PCBs.
Recommended
Industrial Sensor / Keypad Interfaces
Beyond automotive, the PIC16C432T-I/SS suits industrial keypads, encoder interfaces, and low-cost sensor nodes requiring a LIN-equivalent serial link. The 35-instruction RISC core, 200 ns single-cycle execution, and 12 GPIO pins handle matrix keypad scanning, debouncing, and SPI/I2C sensor polling in real time. The 3.5 KB OTP memory stores configuration tables and protocol descriptors, and the industrial -40 C to +85 C range tolerates factory-floor environments. The SSOP-20 package drops onto compact HMI daughter boards, and the integrated transceiver turns the device into a single-chip LIN node when industrial LIN is deployed.
Recommended
Low-Cost Appliance Control
White-goods appliances such as washing machines, dishwashers, and refrigerators increasingly adopt LIN sub-networks for motor and valve control, and the PIC16C432T-I/SS fits the bill for low-cost slave nodes. The integrated LIN physical layer interfaces to the main appliance controller without an external transceiver, while 12 GPIOs drive triac-fired AC loads, relays, and sensor inputs. With 3.5 KB OTP memory the firmware embeds appliance-variant tables, and the 3.0-5.5 V supply rides directly off the appliance's 5 V rail. The SSOP-20 footprint integrates into densely populated appliance control boards.
Recommended
Automotive Seat and Mirror Control
Power seat adjustment and side-mirror positioning rely on multiple low-speed DC motors and position sensors, and the PIC16C432T-I/SS serves as a compact LIN slave reporting actuator status. The integrated LIN transceiver eliminates the external PHY, shrinking PCB area inside seat modules. The 20 MHz CPU executes motor-control loops with 200 ns granularity, and the 12 GPIO pins drive up to four motor half-bridges plus feedback Hall sensors. Industrial temperature range tolerates seat-mounted thermal environments, and the SSOP-20 package fits the slim seat-module enclosure.
Recommended
Body Electronics Switch Panels
Switch panels for lighting, wipers, and turn signals often use a LIN sub-network to reduce wiring harness complexity, and the PIC16C432T-I/SS acts as a smart switch-slave. The integrated LIN transceiver streams button events to the body controller, while the 12 GPIO pins scan up to a 4x4 matrix of mechanical switches with hardware pull-ups. The 200 ns instruction cycle handles debounce and LED-backlight PWM without jitter, and the 128-byte RAM buffers switch events. The industrial temperature grade and 20-SSOP footprint suit interior door-mounted switch panels.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C432T-I/SS β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C432T-E/SS | PIC16C432-I/SS | PIC16F432-I/SS | PIC16C432T-20/SS | PIC16LF432-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-SSOP (5.30 mm) | 20-SSOP (5.30 mm) - same | 20-SSOP (5.30 mm) - same | 20-SSOP (5.30 mm) - same | 20-SSOP (5.30 mm) - same | 20-SSOP (5.30 mm) - same |
| Program Memory Type | OTP (3.5 KB) | OTP (3.5 KB) | OTP (3.5 KB) | Flash (3.5 KB) | OTP (3.5 KB) | Flash (low-voltage) |
| CPU Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Supply Voltage | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 1.8 V to 3.6 V |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | 0 C to +70 C (Commercial) | -40 C to +85 C (Industrial) |
| Integrated LIN Transceiver | Yes | Yes | Yes | Yes | Yes | Yes |
| Reprogrammable | No (OTP) | No (OTP) | No (OTP) | Yes (Flash) | No (OTP) | Yes (Flash) |
Key Differentiators
- Integrated LIN transceiver eliminates external PHY IC (vs PIC16F84A-I/SS (no LIN, 18-pin))
- Industrial temperature grade suited to passenger-compartment ECU (vs PIC16C432T-20/SS (commercial grade))
- OTP memory for lowest possible unit cost at locked BOM (vs PIC16F432-I/SS (Flash memory))
- 35-instruction RISC core with 200 ns single-cycle execution (vs Baseline PIC10F200 (33 instructions, 1 us cycle))
Design Notes
The PIC16C432T-I/SS operates from 3.0 V to 5.5 V, and the integrated LIN physical-layer transceiver draws additional current during LIN transmit frames. Decouple VDD (pin 3) with a 100 nF ceramic capacitor placed within 5 mm of the pin, and add a bulk 10 uF tantalum or ceramic capacitor on the same rail. For automotive 12 V battery inputs, use a 5 V linear regulator (e.g. Microchip MCP1700) or a LIN SBC (e.g. TLE7259-3GE) to provide a clean rail. Keep the LIN bus pull-up to battery (typically 1 kohm plus diode) per LIN physical-layer specification, and route the LIN pin trace away from switching converter inductors.
OTP (One-Time Programmable) memory cannot be erased or rewritten in-circuit; once programmed, the firmware is permanent. Engineers prototyping iterative firmware should not use the PIC16C432T-I/SS - instead choose the Flash-based PIC16F432-I/SS (same 20-SSOP pinout and integrated LIN transceiver) for development, then migrate to PIC16C432T-I/SS once firmware is locked. Also note that the windowed CERDIP PIC16C432 is required if you must UV-erase the OTP die for bench testing of multiple firmware revisions.
The 20-SSOP package has a 0.65 mm pin pitch and 5.30 mm body width; route two signals between adjacent pads and use 0.10 mm/0.15 mm trace-and-space design rules. Place a ground pour under the package to dissipate thermal losses (typically <100 mW for the LIN transceiver plus MCU), and connect VSS pins (2 and 20) directly to this pour with short vias. Keep the LIN bus trace short and impedance-controlled per LIN physical-layer specification (typically 30 ohm nominal with slew-rate-limited driver).
The integrated LIN transceiver on the PIC16C432T-I/SS implements the LIN physical layer (LIN 1.2/1.3 conformant); verify dominant/recessive timing against the LIN specification if your firmware relies on bit-banged LIN frames. The on-chip transceiver typically meets LIN 2.x slew-rate and EMC requirements when the bus pull-up is correctly sized (1 kohm plus reverse diode to VBAT), so external protection (TVS diode such as NUP2105L) is recommended on production LIN nodes.
Compliance Information
RoHS and REACH compliance status not explicitly stated in the verified web data; verify with Microchip product page or distributor before placing production orders. Lead-free per Microchip packaging standards. AEC-Q100 not applicable - this is an industrial-grade part; for automotive Q-grade applications use a Q-suffixed variant.
