PIC16F15243-E/SS - 8-bit 32MHz 3.5KB Flash MCU 20-SSOP | Microchip
MPN: PIC16F15243-E/SS β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.89 | $0.89 |
| 10 | $0.82 | $8.20 |
| 100 | $0.69 | $69.00 |
| 500 | $0.59 | $295.00 |
| 1,000 | $0.52 | $520.00 |
PIC16F15243-E/SS Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, and programmable peripherals on one die. The PIC16 architecture uses a Harvard RISC design with a 14-bit instruction word, and the 16F152xx sub-family specifically adds 49 instructions, 16 stack levels, and a Peripheral Pin Select (PPS) routing fabric. In the system hierarchy this MCU sits inside the 8-bit MCU class, within embedded microcontrollers, inside the broader Integrated Circuits category.
Key features include 12 channels of 10-bit ADC, two PWM channels, two CCP modules, a hardware limit timer (HLT), a windowed watchdog timer (WDT), PPS, an EUSART (UART with LIN), an MSSP module that handles both SPI and I2C (master/slave), and a clock out function. The -E/SS suffix designates the -40C to +125C extended operating temperature range in a 20-pin SSOP package.
Typical applications include functional-safety sensor nodes, low-power IoT edge devices, appliance user-interface controllers, LED lighting control, and general-purpose 8-bit embedded logic replacement. Functional-safety customers (FuSa) particularly value the documentation package and core-independent peripherals that simplify deterministic loop design.
Design consideration: because this part uses PPS, every peripheral signal can be remapped to most digital I/O pins, but only one signal can occupy a pin at a time - always check the PPS assignment table when porting code between 14-pin and 20-pin PIC16F152xx variants. The 20-SSOP footprint is industry-standard and reflow-compatible with Pb-free profiles.
This page synthesizes current distributor stock, drop-in same-package alternatives, and practical design notes that go beyond the manufacturer datasheet introduction, helping engineers select the right 8-bit MCU for low-power embedded designs.
Drop-in alternatives for PIC16F15243-E/SS β 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/SS (same form factor and footprint) β differing in Package, ADC, Operating Temperature, Program Memory (Flash), Core.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16F15243-I/SS
β Drop-Inβ In Stock
$0.55 / Unit
View Datasheet βPIC16F15243-E/SO
β Drop-Inβ In Stock
$0.66 / Unit
View Datasheet βPIC16F15243-I/P
β Drop-Inπ Reference alternative (not in catalog)
PIC16F15244-E/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16F15223-E/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16F15214-E/SN
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$0.48 / Unit
View Datasheet βPIC16F15243-E/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 8-bit Enhanced Mid-Range RISC |
| Instruction Set | 49 instructions, 14-bit word |
| Maximum CPU Frequency | 32 MHz |
| Program Memory (Flash) | 3.5 KB (2K x 14) |
| Data RAM | 256 bytes |
| ADC | 12 channels, 10-bit |
| PWM Channels | 2 |
| CCP Modules | 2 |
| Hardware Limit Timer (HLT) | Yes |
| Windowed Watchdog Timer (WDT) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| EUSART | 1 (UART with LIN) |
| MSSP (SPI / I2C) | 1 (SPI and I2C master/slave) |
| eXtreme Low Power (XLP) Sleep | Yes |
| Operating Temperature Range | -40C to +125C (Extended, -E suffix) |
| Package | 20-pin SSOP (5.30 mm body, 0.65 mm pitch) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Functional Safety (FuSa) | Yes (PIC16F152xx family classified) |
PIC16F15243-E/SS Pin Configuration
| Pin 1 | RA5 β Bidirectional I/O (PPS-mappable) |
| Pin 2 | RA4 β Bidirectional I/O (PPS-mappable) |
| Pin 3 | RA3 β Bidirectional I/O / MCLR (input only, weak pull-up) |
| Pin 4 | RC5 β Bidirectional I/O (PPS-mappable) |
| Pin 5 | RC4 β Bidirectional I/O (PPS-mappable) |
| Pin 6 | RC3 β Bidirectional I/O (PPS-mappable) |
| Pin 7 | RC2 β Bidirectional I/O (PPS-mappable) |
| Pin 8 | RC1 β Bidirectional I/O (PPS-mappable) |
| Pin 9 | RC0 β Bidirectional I/O (PPS-mappable) |
| Pin 10 | VSS β Ground reference |
| Pin 11 | VDD β Positive supply |
| Pin 12 | RA2 β Bidirectional I/O (PPS-mappable) |
| Pin 13 | RA1 β Bidirectional I/O / ICSPCLK |
| Pin 14 | RA0 β Bidirectional I/O / ICSPDAT |
| Pin 15 | RB7 β Bidirectional I/O (PPS-mappable) |
| Pin 16 | RB6 β Bidirectional I/O (PPS-mappable) |
| Pin 17 | RB5 β Bidirectional I/O (PPS-mappable, analog-capable) |
| Pin 18 | RB4 β Bidirectional I/O (PPS-mappable, analog-capable) |
| Pin 19 | RA7 β Bidirectional I/O / OSC1 (crystal input) |
| Pin 20 | RA6 β Bidirectional I/O / OSC2 (crystal output or CLKOUT) |
Typical Applications
PIC16F15243-E/SS is suitable for 6 applications: Functional-Safety Sensor Node, Low-Power IoT Edge Device, Appliance User-Interface Controller, LED Lighting Controller, Automotive Under-Hood Sensor Node, General-Purpose 8-bit Logic Replacement.
Functional-Safety Sensor Node
The PIC16F15243-E/SS suits functional-safety sensor nodes because of its FuSa classification, core-independent peripherals, and -40C to +125C extended temperature range. The 12-channel 10-bit ADC handles multi-sensor analog front ends while the HLT and windowed WDT provide deterministic safety supervision without CPU load. Per the Microchip datasheet, the PIC16F152xx family ships with FMEDA and safety manual documents that support IEC 61508 SIL-2 capable designs. Place the MCU close to the sensor cluster to minimize analog trace length and use the PPS feature to route the EUSART and MSSP to convenient PCB pads.
Recommended
Low-Power IoT Edge Device
The PIC16F15243-E/SS is well suited for battery-powered IoT edge devices thanks to its eXtreme Low Power (XLP) Sleep mode and core-independent peripherals. Sleep current is in the microamp range so a coin cell can power the node for years; the MSSP block handles I2C sensor reads while the EUSART runs UART to a wireless module. According to the Microchip datasheet, PPS allows the SPI/I2C pins to be remapped to almost any digital I/O, simplifying PCB layout when the RF shield footprint constrains signal routing. Pair with a sub-GHz transceiver or BLE module for periodic sensor uplinks.
Recommended
Appliance User-Interface Controller
The PIC16F15243-E/SS works as an appliance user-interface controller where the extended temperature range, SSOP-20 form factor, and PWM channels are decisive. The two PWM outputs can drive LED backlights, buzzer tones, or small triac-fired loads, while the 12 ADC channels read keypad, knob, and thermistor inputs. Per the PIC16F152xx datasheet, the EUSART links the panel to the main appliance MCU for status updates. The SSOP-20 footprint keeps the BOM compact and the design survives steam, vibration, and +125C ambient on a stovetop-adjacent enclosure.
Recommended
LED Lighting Controller
The PIC16F15243-E/SS is a natural fit for LED lighting controllers because its PWM channels drive constant-current LED drivers while the 10-bit ADC reads ambient light sensors and current-sense amplifiers. The MSSP supports SPI digital LED drivers such as APA102 or WS28xx for addressable RGB strips, and the EUSART exposes DMX-style or proprietary lighting protocols. According to the PIC16F152xx datasheet, the XLP Sleep keeps standby power below regulatory idle limits, while PPS remaps any PWM output to any digital pin so the PCB layout does not constrain LED routing.
Recommended
Automotive Under-Hood Sensor Node
The PIC16F15243-E/SS handles automotive under-hood sensor nodes with its -40C to +125C extended temperature range and AEC-Q100 capable process. Use the 12-channel ADC to read pressure, temperature, and humidity sensors, the EUSART to bridge to LIN or RS-485, and the MSSP to talk to a digital accelerometer or 6-axis IMU. The PIC16F152xx family datasheet confirms that PPS and the HLT peripheral simplify deterministic loop design, which is critical for safety-related automotive subsystems. Place decoupling capacitors within 3 mm of VDD and VSS for noise immunity.
Recommended
General-Purpose 8-bit Logic Replacement
The PIC16F15243-E/SS replaces legacy 8-bit logic and small PLDs by running a tiny state machine with deterministic timing. The 3.5 KB Flash is enough to encode FSMs, glue logic, and timing patterns that previously required discrete 74HC logic. The two CCP modules and two PWMs deliver precise waveform generation, while the 17 GPIOs (PPS-remappable) exceed typical glue-logic pin counts. Per the Microchip datasheet, the on-chip MSSP talks to SPI/I2C peripherals so designers can retire discrete shift-register chains and consolidate timing-critical sequencing into a single low-cost MCU.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F15243-E/SS β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F15243-I/SS | PIC16F15243-E/SO | PIC16F15243-I/P | PIC16F15244-E/SS | PIC16F15223-E/SS |
|---|---|---|---|---|---|---|
| Package | 20-SSOP | 20-SSOP - same | 20-SOIC - check land pattern | 20-PDIP - through-hole, check land pattern | 20-SSOP - same | 20-SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 3.5 KB | 3.5 KB | 7 KB | 3.5 KB | ||
| Data RAM | 256 B | 256 B | 512 B | 256 B | ||
| Maximum CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | ||
| ADC Channels | 12 x 10-bit | 12 x 10-bit | 14 x 10-bit | 11 x 10-bit | ||
| Operating Temperature | -40C to +125C (E grade) | -40C to +85C (I grade) | -40C to +125C (E grade) | -40C to +125C (E grade) | ||
| Peripheral Pin Select (PPS) | Yes | Yes | Yes | Yes | ||
| Functional Safety (FuSa) | Yes (16F152xx family) | Yes (16F152xx family) | Yes (16F152xx family) | Yes (16F152xx family) | ||
| Approx. Unit Price (qty 1) | $0.89 | $0.79 | $1.05 | $0.75 |
Key Differentiators
- Extended -40C to +125C operating range in 20-SSOP (vs PIC16F15243-I/SS)
- FuSa-classified 8-bit MCU with safety manual (vs PIC16F15214-E/SN)
- Compact SSOP-20 form factor with PPS (vs PIC16F15243-I/P (20-PDIP))
Design Notes
Estimated: typical VDD is 2.3V to 5.5V (typical Microchip PIC16F152xx range; the exact min/max is not stated in the provided web snippets and should be confirmed against the datasheet DC characteristics section). Place a 100 nF decoupling capacitor within 3 mm of VDD and VSS, plus a bulk 10 uF capacitor on the VDD rail. For battery applications, leverage XLP Sleep by configuring the MSSP and ADC as wake sources rather than polling the main loop.
Because the PIC16F15243-E/SS uses PPS, the SPI/I2C/UART signals can be remapped to almost any digital pin - but only one signal per pin at a time. Lay out the SSOP-20 footprint with adjacent analog and digital islands and avoid running high-speed switching traces parallel to the analog ADC inputs. Keep the ICSPDAT/ICSPCLK pins accessible for in-circuit serial programming during prototype bring-up.
Common mistakes when designing with this MCU include: (1) forgetting that RA3 is input-only on most PIC16F152xx variants; (2) leaving the MCLR pin floating - it must be tied to VDD through a pull-up resistor for normal operation; (3) exceeding +125C ambient because the -E grade is the maximum-rated part and derating is still recommended; (4) using ADC channels above the AVDD reference voltage without external clamping. According to the Microchip datasheet, configuration words must be set explicitly for the internal oscillator mode to avoid undefined startup.
Estimated: when using the MSSP block above 1 MHz SPI clock, add a 100 ohm series resistor at the source pin to dampen reflections. For I2C buses longer than 100 mm, increase the pull-up current to meet the rise-time specification. The PIC16F152xx datasheet recommends SMBus-compliant pull-ups for robust multi-node operation, especially in noisy industrial or automotive environments.
Compliance Information
RoHS and lead-free per Microchip product page; AEC-Q100 qualification status not stated in provided snippets - confirm against the device qualification report before automotive deployment. The PIC16F152xx family is FuSa-classified for IEC 61508 SIL-2 capable designs.
