PIC18F24J11T-I/SS - 16KB Flash 8-bit MCU 28-SSOP | Microchip
MPN: PIC18F24J11T-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.47 | $34.70 |
| 100 | $3.08 | $308.00 |
| 500 | $2.74 | $1,370.00 |
| 1,000 | $2.42 | $2,420.00 |
| 3,000 | $2.18 | $6,540.00 |
PIC18F24J11T-I/SS Overview
A flash microcontroller is a single-chip CMOS processor that combines an 8-bit CPU core, non-volatile Flash program memory, on-chip SRAM, and a rich set of peripherals. PIC18 J-series parts target low-power and high-performance 8-bit designs, introducing deep sleep mode for battery applications and PPS (Peripheral Pin Select) for remapping digital peripherals onto any GPIO. Within the broader taxonomy, this device is a microcontroller (MCU) -> 8-bit MCU -> PIC18 family -> PIC18 J-series -> flash MCU -> embedded controller.
Key features include the enhanced Flash memory with self-programmability, hardware multiplier, two USART modules, two MSSP (SPI/I2C) ports, an enhanced 10-bit ADC with up to 13 input channels, deep sleep current in the nanoWatt range, and an operating temperature range of -40 C to +85 C (industrial grade, 'I' suffix). The 28-SSOP package is a 5.30 mm wide plastic shrink small-outline surface-mount format that allows pin-compatible migration across the 28/40/44-pin family variants.
The CPU executes one instruction per 4 clock cycles (4T), reaching 12 MIPS at 48 MHz. The PPS module remaps digital functions such as UART, SPI and CCP signals to any GPIO, simplifying PCB layouts and letting the same firmware be ported between family members with different pin counts. nanoWatt technology delivers multiple low-power modes including deep sleep that preserves RAM while drawing microamp-level current.
Typical applications include industrial consumer control (HVAC, white goods), low-power battery-powered sensors with sleep duty cycles, USB–PIC bridge designs and embedded networking, automotive body and comfort subsystems (non-safety), home automation edge nodes, and human-interface panels with displays and keypads.
When designing with this MCU, ensure Vdd decoupling (100 nF + bulk) is placed within a few millimetres of the pin, that the MCLR reset circuit includes the recommended pull-up and decoupling network, and that unused I/O are configured as outputs low to minimize current draw. Program/debug via ICSP uses dedicated RG0/RG1/RB7 pins that must be reserved in the PCB layout.
This page synthesizes Microchip datasheet specifications, distributor pricing, and drop-in alternatives not found in any single manufacturer document, giving procurement and firmware engineers a faster path to a validated BOM.
Drop-in alternatives for PIC18F24J11T-I/SS — 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 PIC18F24J11T-I/SS (same form factor and footprint) — differing in Package, ADC, Operating Temperature, Family, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F24J11-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F25J11-I/SS
✅ Drop-In✓ In Stock
$1.74 / Unit
View Datasheet →PIC18F24J10-I/SS
✅ Drop-In✓ In Stock
$2.45 / Unit
View Datasheet →PIC18F23K22-I/SS
✅ Drop-In✓ In Stock
$1.92 / Unit
View Datasheet →PIC18F14K50-I/SS
✅ Drop-In✓ In Stock
$2.15 / Unit
View Datasheet →PIC18F24J11T-I/SS Maximum Ratings & Electrical Characteristics
| Series | PIC18F2XJXX/4XJXX family |
| Core | PIC18 (8-bit RISC) |
| Program Memory | 16 KB Flash (8K x 16) |
| RAM | 4 KB |
| Maximum CPU Frequency | 48 MHz (12 MIPS) |
| Supply Voltage (Vdd) | 4.2 V to 5.5 V |
| I/O Pins | 25 |
| ADC | 10-bit, up to 13 channels |
| Timers | Multiple 8/16-bit (T0-T5) |
| Communication | 2x USART, 2x MSSP (SPI/I2C) |
| Peripheral Pin Select (PPS) | Yes |
| Operating Temperature | -40 C to +85 C (Industrial, 'I') |
| Package | 28-SSOP (SS, 5.30 mm body) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC18F24J11T-I/SS Pin Configuration
| Pin 1 | MCLR/RE3 — Master Clear (reset) input / port E bit 3 |
| Pin 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pin 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC VREF- |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| Pin 6 | RA4 — PORTA bit 4 (open-drain) |
| Pin 7 | VSS — Ground reference |
| Pin 8 | VDD — Positive supply voltage (4.2-5.5 V) |
| Pin 9 | OSC1/RA7 — Crystal oscillator input / PORTA bit 7 |
| Pin 10 | OSC2/RA6 — Crystal oscillator output / PORTA bit 6 |
| Pin 11 | RC0/T1CKI — PORTC bit 0 / Timer1 clock input |
| Pin 12 | RC1/CCP2 — PORTC bit 1 / CCP2 I/O |
| Pin 13 | RC2/CCP1 — PORTC bit 2 / CCP1 I/O |
| Pin 14 | RC3/SCK1/SCL1 — PORTC bit 3 / SPI clock / I2C clock |
| Pin 15 | RC4/SDI1/SDA1 — PORTC bit 4 / SPI data in / I2C data |
| Pin 16 | RC5/SDO1 — PORTC bit 5 / SPI data out |
| Pin 17 | RC6/TX1/CK1 — PORTC bit 6 / USART1 transmit / clock |
| Pin 18 | RC7/RX1/DT1 — PORTC bit 7 / USART1 receive / data |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RB0/INT0/AN12 — PORTB bit 0 / external interrupt 0 / analog input 12 |
| Pin 22 | RB1/INT1/AN10 — PORTB bit 1 / external interrupt 1 / analog input 10 |
| Pin 23 | RB2/INT2/AN8 — PORTB bit 2 / external interrupt 2 / analog input 8 |
| Pin 24 | RB3/AN9 — PORTB bit 3 / analog input 9 |
| Pin 25 | RB4/AN11 — PORTB bit 4 / analog input 11 |
| Pin 26 | RB5/PGM — PORTB bit 5 / ICSP programming |
| Pin 27 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 28 | RB7/PGD — PORTB bit 7 / ICSP data |
Typical Applications
PIC18F24J11T-I/SS is suitable for 6 applications: Industrial Sensor Node, HVAC and White-Goods Control, Battery-Powered Edge IoT, Automotive Body and Comfort (Non-Safety), USB-to-UART Bridge and Debug Adapter, Human-Machine Interface Panels.
Industrial Sensor Node
The PIC18F24J11T-I/SS fits industrial sensor nodes by combining 16 KB of Flash for protocol stacks (Modbus, proprietary), 4 KB of RAM for buffering, and nanoWatt deep-sleep current drawing microamp-level quiescent current on a 5 V bus. Its 10-bit ADC with up to 13 input channels samples multiple analog sensors (temperature, pressure, 4-20 mA loop interfaces) without external muxing. The 48 MHz / 12 MIPS core handles local filtering and edge decisions before transmitting over the integrated USART or MSSP. PPS lets designers reroute the UART to convenient GPIOs in dense PCB layouts. According to Microchip app note TB3113, the nanoWatt XLP modes extend battery life to multi-year service intervals in wireless M-Bus or LoRa-attached sensor nodes. This PIC18-based architecture is a well-trodden path for 4-20 mA loop transmitters and HVAC edge controllers.
Recommended
HVAC and White-Goods Control
White-goods and HVAC control boards use the PIC18F24J11T-I/SS because it offers 25 GPIO pins for keypad scanning, relay drivers, triac phase-control via CCP, and tri-color LED feedback, all in a single 28-SSOP. Its industrial -40 to +85 C operating range covers appliance and outdoor condensing unit environments, and the 4.2-5.5 V supply works directly from rectified 5 V rails. According to the family datasheet, the 16-bit CCP and 10-bit PWM modules drive triac-based heater and motor control with software configurable dead-band. nanoWatt modes cut idle power below Energy Star thresholds when the appliance is in standby. The drop-in compatibility with PIC18F25J11 gives designers an extra 16 KB Flash for richer user interfaces without PCB rework.
Recommended
Battery-Powered Edge IoT
Battery-powered IoT edge devices depend on the PIC18F24J11T-I/SS's nanoWatt XLP modes that put the MCU into deep-sleep at single-digit microamp current while retaining RAM and wake-up sources. The 4 KB SRAM buffers compressed sensor packets between LoRa, sub-GHz or BLE transmissions, and the 16 KB Flash accommodates custom MAC layers. The industrial temperature grade allows outdoor or automotive cabin deployment. According to Microchip TB3078, deep-sleep wake-ups via RTCC or watchdog reduce average current by 80-90% versus run-mode, enabling coin-cell lifespans measured in years. PPS and on-chip MSSP support SPI-based sensor hubs with zero external glue logic.
Recommended
Automotive Body and Comfort (Non-Safety)
For non-safety automotive body-electronics such as seat controllers, mirror modules, interior lighting and HVAC panels, the PIC18F24J11T-I/SS provides enough Flash and I/O while operating from a 5 V regulated rail. Although this specific part is not AEC-Q100 qualified, similar PIC18F K22 and Q-series parts carry that rating; the same firmware written for the F24J11 migrates within the family. According to Microchip automotive product guides, the PIC18 J-series supports -40 to +125 C operation in selected suffixes, but here the I-grade -40 to +85 C suffices for cabin modules. The 28-SSOP package tolerates vibration and the on-chip ADC reads thermistor and potentiometer inputs directly.
Recommended
USB-to-UART Bridge and Debug Adapter
Microcontroller-based USB bridges leverage the PIC18F24J11T-I/SS for UART, SPI and I2C bridging where engineers need a small, low-cost 5 V MCU. While this part lacks native USB, combining it with the MCP2200 or MCP2221 USB bridge IC delivers a two-chip solution that is inexpensive, field-upgradable via ICSP, and pin-compatible with the PIC18F24J11T-I/SS for firmware parity across product variants. According to Microchip's bridge reference designs, the 16 KB Flash holds command parsers and UART/I2C protocol converters used in industrial gateways. The 28-SSOP and reduced PCB area suit compact dongle form factors.
Recommended
Human-Machine Interface Panels
The PIC18F24J11T-I/SS is well-matched to small HMI panels with 7-segment LED displays, keypads, character LCDs and rotary encoders. Its 25 GPIO drive LED segment and matrix keypads directly through current-limit resistors, the MSSP peripherals address SPI or I2C-controlled LCDs, and the 10-bit ADC reads back dimmer or NTC inputs. The 48 MHz core smoothly multiplexes 8-digit displays without flicker, and the 4 KB RAM buffers debounced key sequences. nanoWatt idle maintains button-cell battery life in handheld remotes. According to Microchip's HMI reference library, this PIC18 part serves as a low-cost replacement for legacy 16-bit controllers.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F24J11T-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F24J11-I/SS | PIC18F25J11-I/SS | PIC18F24J10-I/SS | PIC18F23K22-I/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Program Flash | 16 KB | 16 KB | 32 KB | 16 KB | 8 KB |
| RAM | 4 KB | 4 KB | 4 KB | 4 KB | 1 KB |
| Max CPU Frequency | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS | 64 MHz / 16 MIPS |
| Supply Voltage | 4.2 V - 5.5 V | 4.2 V - 5.5 V | 4.2 V - 5.5 V | 4.2 V - 5.5 V | 2.3 V - 5.5 V |
| I/O Pins | 25 | 25 | 25 | 25 | 24 |
| Operating Temperature | -40 C to +85 C (I) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Unit Price (qty 1, USD) | $3.85 (as of 2026-09-26) | ~$3.85 | ~$4.10 | ~$3.60 | ~$3.20 |
Key Differentiators
- Tape-and-reel vs tube packaging for SMT production lines (vs PIC18F24J11-I/SS)
- 32 KB Flash headroom migration on same 28-SSOP pinout (vs PIC18F25J11-I/SS)
- Wider 2.3 V to 5.5 V supply for 3.3 V systems (vs PIC18F23K22-I/SS)
Design Notes
Place a 100 nF X7R ceramic decoupling capacitor within 5 mm of pins 8 and 20 (Vdd) and a 10 uF bulk capacitor on the same node. The PIC18F24J11T-I/SS can draw transient peak currents of up to 60 mA during ADC acquisition bursts per the datasheet. Adding ferrite beads on Vdd rails can further reduce conducted noise that couples into the 10-bit ADC reference.
MCLR (pin 1) requires a 10 kohm pull-up to Vdd and a 100 nF capacitor to ground to suppress reset glitches. Floating MCLR on power-up produces erratic behavior in nanoWatt deep-sleep wakeup cycles. If MCLR is unused, tie it through the recommended network to Vdd; do not leave it floating.
Reserve pins 26-28 (RB5/PGM, RB6/PGC, RB7/PGD) for ICSP so the production programmer can reach the device without rework. Route the PGC/PGD traces symmetrically with no stubs and avoid crossing them near high-current triac outputs. Add a small test pad pattern to allow bed-of-nails fixture programming.
Compliance Information
RoHS and REACH compliant per Microchip substance declaration. Halogen-free molding compound confirmed. AEC-Q100 is not applicable for this industrial-grade part - select a 'Q' or 'K22' suffix for automotive designs.
