PIC18F1320T-I/ML - 8KB Flash 40MHz 8-bit MCU | Microchip
MPN: PIC18F1320T-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $3.02 | $1,510.00 |
| 1,000 | $2.74 | $2,740.00 |
| 3,300 | $2.4 | $7,920.00 |
PIC18F1320T-I/ML Overview
A microcontroller (MCU) is a single-chip computer containing a CPU, volatile and non-volatile memory, peripherals, and I/O — used to sense, decide, and actuate in embedded systems. The PIC18F family sits in Microchip's 8-bit roadmap, sitting beneath PIC24/dsPIC in compute density while offering Harvard architecture, RISC instruction set, and a mature toolchain (MPLAB X, XC8). The PIC18F1320 belongs to the smaller pin-count tier (18/20/28-pin) optimized for cost-sensitive and space-constrained designs.
Key features include eight power-managed modes that drop current to 0.1 µA standby, integrated 10-bit ADC with multiple channels, and the Enhanced Flash memory with self-programmability under software control. The wide 2.0–5.5 V supply tolerates direct battery operation (2x AA, coin cell, USB) without external regulation, and the device supports in-circuit serial programming (ICSP) plus in-circuit debugger (ICD) interfaces.
Architecturally, the PIC18F1320 employs a 16-bit instruction word with an 8-bit data path, eight-level hardware stack, and a 31-level software stack. The 10-bit ADC uses successive approximation with up to seven analog input channels (depending on package); nanoWatt modes include Run, Idle, Sleep, Timer1 oscillator, PRI_RUN, SEC_RUN, and PRI_IDLE — each tuned to trade wake latency vs. quiescent current.
Typical applications include battery management devices, sensor conditioning nodes, low-power consumer appliances, USB HID peripherals, and small home appliances. Thanks to its wide voltage range and nanoWatt sleep modes, the PIC18F1320 is often specified where a regulator is undesirable or unacceptable.
When designing in this part, place the exposed pad (EP) on the bottom of the QFN to a ground pour with multiple thermal vias to dissipate heat and maintain substrate integrity. Decouple VDD with 100 nF and 10 µF capacitors within 3 mm of the pins; a 100 Ω ferrite or ferrite bead on VDD can further reduce noise injection from switching regulators sharing the rail.
This page synthesizes distributor pricing, drop-in same-package alternatives from the same Microchip PIC18F family, and practical design notes not consolidated in the single manufacturer datasheet alone.
Drop-in alternatives for PIC18F1320T-I/ML — 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 PIC18F1320T-I/ML (same form factor and footprint) — differing in Core Architecture, Package, ADC, Mounting Type, I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F1220T-I/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.74 / Unit
View Datasheet →PIC18F1320-I/ML
✅ Drop-In✓ In Stock
$1.51 / Unit
View Datasheet →PIC18LF1320-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F1220-I/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.85 / Unit
View Datasheet →PIC18F1320T-I/MLG
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F1320T-I/ML Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 8-bit RISC |
| Program Memory | 8 KB Flash (4K x 16 words) |
| RAM | 256 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 40 MHz (10 MIPS) |
| Operating Voltage Range | 2.0 V to 5.5 V |
| I/O Pins | 16 |
| ADC | 10-bit, 7 channels |
| Package | QFN-28 (ML) 6x6 mm with exposed pad |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| Power Management | nanoWatt Technology - 6 modes, 0.1 µA standby |
| In-Circuit Programming | ICSP / ICD supported |
| RoHS Compliance | Compliant |
PIC18F1320T-I/ML Pin Configuration
| Pin 1 | RA2/AN2 — Bidirectional I/O / Analog input channel 2 |
| Pin 2 | RA3/AN3/VREF+ — Bidirectional I/O / Analog input / ADC positive reference |
| Pin 3 | RA4/AN4 — Bidirectional I/O / Analog input channel 4 (open-drain) |
| Pin 4 | RA5/AN5 — Bidirectional I/O / Analog input channel 5 |
| Pin 5 | VSS — Ground reference |
| Pin 6 | OSC1/RA7 — Crystal oscillator input / bidirectional I/O |
| Pin 7 | OSC2/RA6 — Crystal oscillator output / bidirectional I/O |
| Pin 8 | RC0 — Bidirectional I/O port C bit 0 |
| Pin 9 | RC1 — Bidirectional I/O port C bit 1 |
| Pin 10 | RC2 — Bidirectional I/O port C bit 2 |
| Pin 11 | RC3 — Bidirectional I/O port C bit 3 |
| Pin 12 | RC4 — Bidirectional I/O port C bit 4 |
| Pin 13 | RC5 — Bidirectional I/O port C bit 5 |
| Pin 14 | RC6 — Bidirectional I/O port C bit 6 |
| Pin 15 | RC7 — Bidirectional I/O port C bit 7 |
| Pin 16 | VSS — Ground reference |
| Pin 17 | VDD — Positive supply (2.0 V to 5.5 V) |
| Pin 18 | RB0/INT — Bidirectional I/O / external interrupt |
| Pin 19 | RB1 — Bidirectional I/O port B bit 1 |
| Pin 20 | RB2 — Bidirectional I/O port B bit 2 |
| Pin 21 | RB3 — Bidirectional I/O port B bit 3 |
| Pin 22 | RB4 — Bidirectional I/O port B bit 4 |
| Pin 23 | RB5 — Bidirectional I/O port B bit 5 |
| Pin 24 | RB6/PGC — Bidirectional I/O / ICSP clock |
| Pin 25 | RB7/PGD — Bidirectional I/O / ICSP data |
| Pin 26 | MCLR/VPP/RA0 — Master clear reset / programming voltage / port A bit 0 |
| Pin 27 | RA1/AN1 — Bidirectional I/O / Analog input channel 1 |
| Pin 28 | NC — Not connected (per datasheet) |
| Pin 29 | PAD — Exposed thermal pad - connect to VSS |
Typical Applications
PIC18F1320T-I/ML is suitable for 7 applications: Battery Management Devices, Industrial Sensor Conditioning, Low-Power Consumer Appliances, USB HID Peripherals, Small Home Appliance Control, LED Lighting and Indication, Automotive Interior Modules (Non-Safety).
Battery Management Devices
The PIC18F1320T-I/ML suits battery-operated products because it operates from 2.0–5.5 V and consumes 0.1 µA in standby via nanoWatt Technology, enabling multi-year life on two AA cells. Its 8 KB Flash holds state machines for fuel gauging, low-battery alerts, or charge-profile selection. The 10-bit ADC monitors cell voltage and current, while the wide voltage range avoids an external LDO that would otherwise drain the battery. Compared to discrete logic, the integrated ADC and timers shrink PCB area.
Recommended
Industrial Sensor Conditioning
In factory sensor interfaces the PIC18F1320T-I/ML reads 4–20 mA or 0–10 V transducer signals through its 10-bit ADC (7 channels) and posts results on GPIO or UART. The wide 2.0–5.5 V supply tolerates 24 V industrial bus inputs after front-end resistor scaling, while its -40 to +85 C operation handles production-floor environments. The 8 KB Flash supports Modbus RTU or simple proprietary protocols without external memory. Estimated power at 40 MHz, 5 V: roughly 22 mA active, allowing fanless PCB-mount designs.
Recommended
Low-Power Consumer Appliances
For small kitchen or personal-care appliances the PIC18F1320T-I/ML combines user-input buttons, LED indicators, and timer-driven buzzer or motor control from a single chip. nanoWatt sleep current of 0.1 µA keeps standby power below the EU Ecodesign 0.5 W limits and the 0.1 µA standby is a key enabler for battery-equipped appliances. The QFN-28 (ML) 6x6 mm exposed pad provides improved thermal dissipation for solenoid or relay drive. Estimated: design executes a 100-step state machine in 4 KB Flash with 4 KB headroom for diagnostics.
Recommended
USB HID Peripherals
Although the PIC18F1320T-I/ML lacks native USB, its 40 MHz throughput and 8 KB Flash can implement low-speed USB 1.1 HID via software on D+/D- GPIO with external pull-up resistors and 3.3 V regulation. The wide operating voltage allows direct 5 V USB VBUS supply, while the small QFN package suits dongle-format peripherals. Compared to dedicated USB MCUs this approach trades programming complexity for reduced BOM cost. The 256-byte SRAM constrains HID report buffers, so designers must minimize RAM footprint or upgrade to PIC18F14K50-family for native USB.
Recommended
Small Home Appliance Control
Coffee makers, irons, and small kitchen tools use the PIC18F1320T-I/ML to drive TRIAC/SSR elements, read NTC temperature sensors via the on-chip 10-bit ADC, and time user-set cooking profiles from 8 KB of Flash. The QFN-28 6x6 mm exposed pad handles modest continuous dissipation while keeping a small PCB. nanoWatt sleep preserves battery backup for clock functions on unplug events. Estimated: one A/D channel plus two timer peripherals can implement closed-loop temperature control within the 10 MIPS instruction budget.
Recommended
LED Lighting and Indication
Architectural LED drivers, dimmers, and indicator strips use the PIC18F1320T-I/ML to generate PWM dimming, fade tables, and color-mixing ramps from a single low-cost MCU. The 2.0–5.5 V supply allows direct 3.3 V or 5 V LED rails without regulation, while nanoWatt standby keeps average consumption low for always-on indicator applications. Estimated: at 40 MHz the device can update four PWM channels at 10 kHz with 256-step resolution, suiting RGBW mixing. External MOSFETs or LED drivers handle the actual high-current switching.
Recommended
Automotive Interior Modules (Non-Safety)
Although non-AEC-Q100, the PIC18F1320T-I/ML finds use in non-safety interior modules such as HVAC trim controls, ambient lighting, or seat-position memory switches where its 8-bit architecture and low standby current meet cost targets. The -40 to +85 C industrial grade covers typical cabin environments. For safety-critical or AEC-Q100 work, designers should step up to a Microchip PIC18 K-series or dsPIC variant. The 10-bit ADC suits knob-position sensing and trim-button de-bounce without external signal conditioning.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F1320T-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F1220T-I/ML | PIC18F1320-I/ML | PIC18LF1320-I/ML | PIC18F1220-I/ML | PIC18F1320T-I/MLG |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | QFN-28 (ML) 6x6 mm | QFN-28 (ML) 6x6 mm - same | QFN-28 (ML) 6x6 mm - same | QFN-28 (ML) 6x6 mm - same | QFN-28 (ML) 6x6 mm - same | QFN-28 (ML) 6x6 mm - same |
| Program Memory (Flash) | 8 KB | 4 KB | 8 KB | 8 KB | 4 KB | 8 KB |
| RAM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Maximum CPU Speed | 40 MHz | 40 MHz | 40 MHz | 20-25 MHz (LF max at low VDD) | 40 MHz | 40 MHz |
| Operating Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 1.8 V to 3.6 V (LF variant) | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| I/O Pins | 16 | 16 | 16 | 16 | 16 | 16 |
| Standby Current (nanoWatt) | 0.1 µA | 0.1 µA | 0.1 µA | 0.1 µA | 0.1 µA | 0.1 µA |
| Temperature Range | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Key Differentiators
- NanoWatt sleep current of 0.1 µA at full industrial -40 to +85 C (vs PIC18F1220T-I/ML)
- Wide 2.0–5.5 V supply tolerates direct battery and USB operation (vs PIC18LF1320-I/ML)
- Lowest 8 KB Flash option within the PIC18 nanoWatt family in QFN-28 (ML) (vs PIC18F1230-I/P)
Design Notes
The QFN-28 (ML) 6x6 mm package has a center exposed pad that must be soldered to a ground pour with at least four thermal vias to the inner/inner or inner/bottom ground plane. Skipping this connection degrades thermal performance, may violate DC bias settling on the substrate, and risks incomplete ground return. Place 100 nF and 10 µF decoupling capacitors within 3 mm of VDD/VSS pins to suppress switching transients. A 100 Ω ferrite bead between the regulator and VDD pin reduces noise injection from upstream switching rails.
Estimated: at 40 MHz Fosc and 5.0 V VDD, the PIC18F1320T-I/ML draws approximately 22 mA active and 0.1 µA in Sleep. Designers specifying battery life should use the Timer1 oscillator sleep mode for periodic wake intervals, which gives typical current of 2-3 µA at 32 kHz. The 2.0–5.5 V supply tolerates direct 2x AA cell operation down to ~2.0 V without boost converter, but operation below 2.0 V requires the LF variant. Plan for a low-battery reset threshold around 2.0 V to ensure reliable Flash writes.
Common pitfalls when prototyping with the PIC18F1320T-I/ML: (1) Forgetting MCLR pull-up to VDD — without it the part may fail to start or randomly reset. (2) Using a crystal without load-capacitor calculation matching the XT/HS mode spec — extra capacitance slows startup. (3) Programming via ICSP without isolating high-capacitance VDD rail — if VDD is not stable during programming the part will fail to enter ICSP mode. (4) Confusing 8-bit ADC result (0–255) with the 10-bit ADC result (0–1023) — always right-shift the 10-bit value by 2 for compatible output format.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified; for automotive applications a PIC18 K-series or dsPIC AEC-Q100 part should be selected instead.
