PIC16F15243-E/REB - 8-bit 32MHz 3.5KB Flash MCU | Microchip
MPN: PIC16F15243-E/REB ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.1 | $1.10 |
| 10 | $0.99 | $9.90 |
| 100 | $0.85 | $85.00 |
| 500 | $0.75 | $375.00 |
| 1,000 | $0.65 | $650.00 |
PIC16F15243-E/REB Overview
What is an 8-bit microcontroller? An 8-bit microcontroller (MCU) is a small computer-on-a-chip that integrates a CPU, memory, and peripherals on a single die. PIC microcontrollers use a modified Harvard RISC architecture with separate program and data buses. They belong to the broader category of embedded microcontrollers within the semiconductor hierarchy: MCU -> microcontroller -> embedded processor -> semiconductor. The 8-bit class targets cost-sensitive, low-power applications where deterministic real-time behavior and ease of use outweigh raw computational throughput.
Key features include 10-bit ADC with computation, 2 PWM modules, 2 CCP (Capture/Compare/PWM), Hardware Limit Timer (HLT), Watchdog Timer (WDT), Peripheral Pin Select (PPS), and communication peripherals EUSART, SPI, and I2C. The XLP Sleep Mode enables nanoWatt-class standby currents for battery-powered designs. PPS allows flexible signal routing, mapping digital peripherals to physical pins in software rather than via fixed silicon multiplexing.
The PIC16F15243 employs a 14-bit instruction word with a deep pipeline and a 32 MHz internal oscillator, delivering 8 MIPS throughput. Core Independent Peripherals such as the Hardware Limit Timer and CWG (Complementary Waveform Generator) operate without CPU intervention, enabling deterministic timing and offloading the core. Functional Safety support makes this part attractive for safety-critical applications requiring documentation for IEC 61508 or similar standards.
Typical applications include IoT sensor nodes, battery-powered edge devices, automotive body and sensor subsystems, industrial sensor signal conditioning, low-cost motor control, and consumer white goods. The combination of small VQFN-20 footprint, eXtreme Low-Power Sleep, and PPS makes this MCU particularly attractive for space-constrained designs.
When designing with this part, leverage PPS to route peripherals to available pins and minimize PCB routing complexity. Choose the -E temperature grade only when the application exceeds +85C ambient; the standard -I grade parts are otherwise functionally identical and generally less expensive.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC16F15243-E/REB — 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 PIC16F15243-E/REB (same form factor and footprint) — differing in Package, ADC, Program Memory (Flash), Core Architecture, Functional Safety (FuSa).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F15243-I/REB
✅ Drop-In✓ In Stock
$0.76 / Unit
View Datasheet →PIC16F15243-E/SS
✅ Drop-In✓ In Stock
$0.52 / Unit
View Datasheet →PIC16F15244-I/REB
✅ Drop-In✓ In Stock
$0.71 / Unit
View Datasheet →PIC16F15245-I/REB
✅ Drop-In✓ In Stock
$0.52 / Unit
View Datasheet →PIC16F15243-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F15223-I/REB
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F15243-E/REB Maximum Ratings & Electrical Characteristics
| Core | PIC 8-bit RISC |
| Program Memory (Flash) | 3.5 KB (2K x 14) |
| SRAM | 256 B |
| Max CPU Frequency | 32 MHz |
| Instruction Throughput | 8 MIPS |
| ADC | 10-bit |
| PWM Modules | 2 |
| CCP Modules | 2 |
| Communication | EUSART, SPI, I2C |
| Operating Temperature | -40C to +125C (E grade) |
| Package | 20-VQFN (3x3 mm) |
| Pin Count | 20 |
| Functional Safety (FuSa) | Supported |
| XLP Sleep Mode | Yes (nanoWatt class) |
| Peripheral Pin Select (PPS) | Yes |
| Watchdog Timer (WDT) | Yes |
| Hardware Limit Timer (HLT) | Yes |
| RoHS Status | Compliant |
PIC16F15243-E/REB Pin Configuration
| Pin 1 | RA5 — Port A bit 5 / PPS I/O |
| Pin 2 | RA4 — Port A bit 4 / PPS I/O |
| Pin 3 | RA3 — Port A bit 3 / PPS I/O |
| Pin 4 | RA2 — Port A bit 2 / PPS I/O |
| Pin 5 | RA1 — Port A bit 1 / PPS I/O |
| Pin 6 | RA0 — Port A bit 0 / PPS I/O |
| Pin 7 | VSS — Ground reference |
| Pin 8 | VDD — Positive supply voltage |
| Pin 9 | RA7 — Port A bit 7 / PPS I/O |
| Pin 10 | RA6 — Port A bit 6 / PPS I/O |
| Pin 11 | RC5 — Port C bit 5 / PPS I/O |
| Pin 12 | RC4 — Port C bit 4 / PPS I/O |
| Pin 13 | RC3 — Port C bit 3 / PPS I/O |
| Pin 14 | RC2 — Port C bit 2 / PPS I/O |
| Pin 15 | RC1 — Port C bit 1 / PPS I/O |
| Pin 16 | RC0 — Port C bit 0 / PPS I/O |
| Pin 17 | RB7 — Port B bit 7 / PPS I/O |
| Pin 18 | RB6 — Port B bit 6 / PPS I/O |
| Pin 19 | RB5 — Port B bit 5 / PPS I/O |
| Pin 20 | EP — Exposed thermal pad (connect to VSS for thermal dissipation) |
Typical Applications
PIC16F15243-E/REB is suitable for 6 applications: Battery-Powered IoT Sensor Nodes, Automotive Body Electronics and Sensor Subsystems, Industrial Sensor Signal Conditioning, Low-Cost BLDC and Stepper Motor Control, Consumer White Goods and Appliances, Smart Home and Building Automation Endpoints.
Battery-Powered IoT Sensor Nodes
The PIC16F15243-E/REB's eXtreme Low-Power (XLP) Sleep Mode in the nanoWatt class makes it ideal for battery-powered IoT sensor nodes that spend most of their life in deep sleep. The 10-bit ADC provides adequate resolution for temperature, humidity, and battery voltage monitoring, while EUSART/SPI/I2C interfaces connect to radios (LoRa, BLE, Sub-GHz). At a typical 32 MHz active current of a few mA and Sleep current in the nA range, this MCU supports multi-year coin-cell operation. The extended -40C to +125C temperature grade handles outdoor and industrial sensor deployments without thermal derating concerns.
Recommended
Automotive Body Electronics and Sensor Subsystems
The PIC16F15243's Functional Safety (FuSa) support documentation and -40C to +125C extended temperature grade suit non-safety-critical automotive body electronics such as interior lighting controllers, mirror adjusters, seat position encoders, and sensor interface modules. The Hardware Limit Timer CIP can offload watchdog-style monitoring from the CPU, while 2 PWM channels drive LED dimming or small DC loads. The 20-VQFN 3x3 mm footprint fits behind trim panels where space is at a premium. For powertrain or ADAS applications, however, select a part explicitly AEC-Q100 qualified.
Recommended
Industrial Sensor Signal Conditioning
The PIC16F15243's 10-bit ADC with computation and Core Independent Peripherals make it well-suited for industrial 4-20 mA sensor signal conditioning, RTD/thermocouple linearization, and bridge sensor excitation control. The PPS feature allows flexible pin assignment to keep analog and digital routing separate. The extended -E temperature grade handles factory floor ambient up to 125C without derating. EUSART and SPI interfaces connect to industrial backplane transceivers or isolated communication modules. The 32 MHz CPU speed supports modest Kalman filtering and digital compensation algorithms at low loop rates.
Recommended
Low-Cost BLDC and Stepper Motor Control
The PIC16F15243's 2 PWM channels plus 2 CCP modules and Hardware Limit Timer enable low-cost BLDC or stepper motor control for fans, pumps, and small actuators. The 32 MHz instruction rate and 8 MIPS throughput provide sufficient headroom for simple FOC or trapezoidal commutation algorithms. The CWG (Complementary Waveform Generator) peripheral generates complementary PWM with dead-band insertion for half-bridge drivers. The extended temperature grade supports motor-driver integrated thermal environments.
Recommended
Consumer White Goods and Appliances
The PIC16F15243's combination of small VQFN footprint, low cost, XLP Sleep, and robust peripherals makes it ideal for consumer white goods such as coffee machines, air purifiers, blenders, and small kitchen appliances. The 10-bit ADC reads temperature sensors and user potentiometers, while PWM drives indicator LEDs and small solenoid valves. The Hardware Limit Timer handles capacitive touch or button-debounce timing in hardware. The -40C to +125C range supports under-hood or near-heating-element placement.
Recommended
Smart Home and Building Automation Endpoints
The PIC16F15243-E/REB fits smart home endpoints like wireless dimmers, motorized blinds, smart thermostats, and occupancy sensors. XLP Sleep supports battery-powered window/door sensors that report only on state change. The EUSART and I2C interfaces connect to common sub-GHz or BLE modules. The PPS flexibility allows compact PCB layouts where pin count is constrained. PPS also simplifies multi-sensor hub designs that need flexible signal routing to fit mechanical enclosures.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F15243-E/REB — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F15243-I/REB | PIC16F15244-I/REB | PIC16F15245-I/REB | PIC16F15243-E/SS | PIC16F15223-I/REB |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-VQFN (3x3 mm) | 20-VQFN (3x3) - same | 20-VQFN (3x3) - same | 20-VQFN (3x3) - same | 20-SSOP - different footprint | 20-VQFN (3x3) - same |
| Flash Memory | 3.5 KB | 3.5 KB | 7 KB | 14 KB | 3.5 KB | 2 KB |
| SRAM | 256 B | 256 B | 512 B | 1 KB | 256 B | 256 B |
| Max CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| Operating Temperature | -40C to +125C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C |
| PPS | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Extended -40C to +125C temperature grade in compact 20-VQFN (vs PIC16F15243-I/REB)
- Functional Safety (FuSa) documentation support (vs PIC16F15223-I/REB)
- Smallest 3x3 mm VQFN footprint in PIC16F152xx family (vs PIC16F15245-I/REB)
Design Notes
Estimated: at 32 MHz active and 3.3V supply, the PIC16F15243-E/REB draws approximately 4-6 mA typical active current per the Microchip PIC16F152xx datasheet (DS40002165B). For battery-powered designs, leverage the XLP Sleep mode (typical <100 nA) and use peripheral wake-up sources such as timer overflow, INT pin change, or WDT to minimize average current. Duty-cycle the active periods aggressively for sub-uA average consumption in IoT sensor nodes.
The 20-VQFN package has an exposed thermal pad (EP) that MUST be soldered to the ground plane for mechanical reliability and thermal dissipation. Place a 0.1 uF ceramic decoupling capacitor within 2 mm of the VDD pin and connect it to a low-impedance ground via. Keep analog and digital ground returns separated where possible to minimize ADC noise coupling.
Estimated: do not exceed the absolute maximum VDD of 5.5V on the PIC16F15243-E/REB. When migrating firmware from PIC16F1503 or similar older PIC16F1xxx parts, verify PPS register mappings because pin-peripheral assignments differ significantly. The -E grade operates to +125C but Flash write endurance and ADC performance degrade near the temperature extremes; budget derating for industrial sensor applications.
Use the Hardware Limit Timer (HLT) or CCP in hardware-triggered mode for time-sensitive capture and PWM rather than software loops, freeing the CPU for protocol handling. The CWG (Complementary Waveform Generator) is available in some PIC16F152xx family members but verify per-part availability. For SPI/I2C bus runs longer than 50 mm, add series resistors near the driver and consider slew-rate control to reduce ringing.
Compliance Information
RoHS compliant per Microchip product page. The -E temperature grade supports industrial and automotive body electronics but the part is NOT explicitly AEC-Q100 qualified - confirm with Microchip for safety-critical automotive designs. Functional Safety (FuSa) documentation is available separately.
