PIC16F527-E/SO - 8-bit PIC MCU, 20MHz, 1.5KB Flash, 20-SOIC | Microchip
MPN: PIC16F527-E/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.32 | $2.32 |
| 10 | $2.1 | $21.00 |
| 100 | $1.86 | $186.00 |
| 500 | $1.65 | $825.00 |
| 1,000 | $1.47 | $1,470.00 |
PIC16F527-E/SO Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, program and data memory, and integrated peripherals such as timers, communication interfaces, and analog blocks. Within the broader taxonomy, the PIC16F527 belongs to the 8-bit MCU family, which sits below 16-bit and 32-bit MCUs in arithmetic performance but excels at cost-sensitive, deterministic, low-power embedded control tasks. The PIC16F527 specifically bridges the gap between pure digital MCUs and analog-front-end MCUs by integrating op-amps and comparators directly on-die, replacing what would otherwise be a multi-chip signal-conditioning solution.
Key features include 1.5 KB self-programmable flash, 67 bytes of RAM, 1.2 KB of non-volatile EEPROM data memory, an 8-bit successive-approximation ADC with up to 8 input channels, two rail-to-rail op-amps, two comparators with programmable reference, two 8-bit timers, one 16-bit timer, a 4 MHz internal oscillator, and a wide 2.0 V to 5.5 V operating voltage range. The integrated analog peripherals reduce external component count, bill-of-material cost, and PCB area for sensor-interface and closed-loop control designs.
Architecturally, the PIC16F527 uses Microchip's baseline PIC16 RISC core with 33 single-word instructions, hardware stack, and 200 ns instruction cycle at 20 MHz. The analog block includes dedicated configuration registers for op-amp bandwidth, comparator hysteresis, and ADC channel selection, enabling firmware-tunable sensor signal paths without external potentiometers.
Typical applications include industrial process control, sensor signal conditioning, battery management, automotive body electronics, HVAC damper/valve control, low-cost smoke detectors, and consumer appliance control. The wide operating voltage and integrated op-amps particularly suit 4-20 mA current-loop sensor front-ends and bridge-sensor amplification circuits.
When designing with the PIC16F527, ensure the analog supply (AVDD) and digital supply (VDD) are tied to the same rail with adequate decoupling (typically 0.1 µF ceramic close to each VDD pin), and note that the op-amp output stages have limited drive capability - high-current loads require external buffers. Configuration word programming must specify the oscillator mode, watchdog timer, brown-out voltage, and code protection before first flash.
This page synthesizes distributor pricing, drop-in same-package alternatives, design pitfalls, and analog integration guidance not found in the manufacturer datasheet alone, helping engineers select and integrate the PIC16F527-E/SO in cost-sensitive analog-front-end designs.
Drop-in alternatives for PIC16F527-E/SO — 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 PIC16F527-E/SO (same form factor and footprint) — differing in ADC, Comparators, Core Architecture, Internal Oscillator, Operational Amplifiers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F527-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F527T-E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F526-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F506-E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F527-E/JP
✅ Drop-In✓ In Stock
$0.66 / Unit
View Datasheet →PIC16F527-E/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 8-bit RISC |
| Program Memory Type | Flash |
| Program Memory Size | 1.5 KB (1K x 12 words) |
| RAM Size | 67 bytes |
| EEPROM Data Memory | 64 bytes (non-volatile) |
| Maximum CPU Frequency | 20 MHz |
| Instruction Cycle Time | 200 ns at 20 MHz |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| Operating Temperature Range | -40 °C to +125 °C (Extended, -E grade) |
| ADC | 8-bit, up to 8 channels |
| Operational Amplifiers | 2 internal op-amps |
| Comparators | 2 internal comparators |
| Timers | 2 x 8-bit + 1 x 16-bit |
| Internal Oscillator | 4 MHz (calibrated) |
| Package | 20-pin SOIC (SO) |
| I/O Pins | Up to 14 bidirectional I/O |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC16F527-E/SO Pin Configuration
| Pin 1 | RA0/AN0 — Bidirectional I/O / analog channel 0 |
| Pin 2 | RA1/AN1 — Bidirectional I/O / analog channel 1 |
| Pin 3 | RA2/AN2 — Bidirectional I/O / analog channel 2 |
| Pin 4 | RA3/AN3 — Bidirectional I/O / analog channel 3 |
| Pin 5 | RA4/AN4 — Bidirectional I/O / analog channel 4 |
| Pin 6 | RA5/AN5 — Bidirectional I/O / analog channel 5 |
| Pin 7 | VDD — Positive supply (2.0 V to 5.5 V) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RB0/INT — Bidirectional I/O / external interrupt |
| Pin 10 | RB1 — Bidirectional I/O |
| Pin 11 | RB2 — Bidirectional I/O |
| Pin 12 | RB3 — Bidirectional I/O |
| Pin 13 | RB4 — Bidirectional I/O |
| Pin 14 | RB5 — Bidirectional I/O |
| Pin 15 | RB6/ICSPDAT — Bidirectional I/O / ICSP data |
| Pin 16 | RB7/ICSPCLK — Bidirectional I/O / ICSP clock |
| Pin 17 | RC0 — Bidirectional I/O |
| Pin 18 | RC1 — Bidirectional I/O |
| Pin 19 | RC2 — Bidirectional I/O |
| Pin 20 | MCLR/VPP — Master clear reset / programming voltage input |
Typical Applications
PIC16F527-E/SO is suitable for 6 applications: Industrial Sensor Signal Conditioning, Automotive Body Electronics, Battery-Powered IoT Sensor Nodes, Low-Cost Smoke and Fire Detectors, HVAC Damper and Valve Control, Consumer Appliance Control Boards.
Industrial Sensor Signal Conditioning
The PIC16F527-E/SO is purpose-built for industrial sensor interface modules because its two integrated op-amps can directly amplify low-level bridge, thermocouple, or thermistor signals without external amplifiers, while the 8-bit ADC digitizes the conditioned output for serial transmission. Its 2.0-5.5 V operating range accepts 24 V industrial loops after resistive division. The Extended -40 °C to +125 °C temperature grade supports outdoor and factory-floor deployments. Place the part near the sensor with 0.1 µF ceramic decoupling on VDD/AVDD, route analog traces away from digital switching, and use the internal 4 MHz oscillator for cost reduction. Companion: MCP6002 (external op-amp backup) or PIC18F25K22 (upgrade path).
Recommended
Automotive Body Electronics
In automotive body-electronics modules (HVAC dampers, seat position controllers, mirror adjusters), the PIC16F527-E/SO's Extended temperature grade (-40 °C to +125 °C) and 20 MHz performance handle sensor reading, PWM actuator driving, and LIN-bus communication. The two on-chip comparators enable zero-crossing detection and over-current protection without external ICs, while the 8-bit ADC reads multiplexed position sensors. Note: this part is NOT AEC-Q100 PPAP-qualified - for safety-critical subsystems, migrate to PIC16F1xxx enhanced family. Pair with TJA1027 LIN transceiver and use the internal 4 MHz oscillator for BOM cost reduction. Recommended companion: ATA663231 (LIN SBC).
Recommended
Battery-Powered IoT Sensor Nodes
The PIC16F527-E/SO's 2.0 V minimum operating voltage allows direct connection to two alkaline cells (2.4-3.0 V) or a single Li-ion cell after boost, while its nanoWatt sleep modes achieve <1 µA standby current for multi-year battery life on wireless sensor nodes. The integrated op-amps and ADC eliminate external analog ICs, reducing sleep-mode leakage from auxiliary components. The 20 MHz peak performance provides enough headroom for sensor sampling at 1 kHz, digital filtering, and LoRa/Sigfox transmit packet assembly. Decouple VDD with 10 µF + 0.1 µF, and use the WDT + BOD for unattended deployments. Recommended companion: SX1276 (LoRa transceiver).
Recommended
Low-Cost Smoke and Fire Detectors
The PIC16F527-E/SO fits photoelectric and ionization smoke detector designs because its two on-chip comparators directly interface to the analog front-end - one comparator monitors the photo-detector signal against a programmable threshold while the other supervises battery voltage. The 1.5 KB flash holds the alarm algorithm, beep pattern, and self-test routines. With its Extended temperature grade the part operates reliably in ceiling-mounted fire-alarm installations that experience wide thermal swings. Use the internal 4 MHz oscillator for cost and route the piezo buzzer driver through a discrete transistor pair for adequate SPL. Recommended companion: MCP9700 (temperature sensor for heat-detector variant).
Recommended
HVAC Damper and Valve Control
In HVAC zone damper and valve actuator modules, the PIC16F527-E/SO's 16-bit timer generates the precise PWM duty cycles needed for proportional servo control, while its dual op-amps read the position feedback potentiometer differentially for closed-loop accuracy. The 2.0-5.5 V operating range accepts 24 VAC rectified and stepped-down supply rails common in HVAC control panels. With the Extended temperature grade, the part operates in attics and mechanical rooms where temperatures routinely exceed 70 °C. Use the WDT for unattended recovery, and route actuator drive through external MOSFETs since MCU I/O cannot directly drive the actuator motor. Recommended companion: IRF7507 (dual MOSFET driver).
Recommended
Consumer Appliance Control Boards
The PIC16F527-E/SO is well suited to consumer appliances (rice cookers, washing machines, microwave ovens) where it reads temperature sensors via its integrated op-amp/ADC chain, drives LED/LCD displays through its GPIO, and controls relays via timer interrupts. Its 20-SOIC package is hand-solderable for prototype and small-batch production, and the 1.5 KB flash accommodates state-machine firmware with user-interface menus. The Extended temperature grade handles oven-cabinet and under-counter appliance environments. Decouple supply aggressively near relay coils to prevent MCU resets, and use optocouplers on AC-mains-referenced inputs. Recommended companion: ULN2003 (relay driver array).
Recommended
Recommended Products Summary
Engineering reference data for PIC16F527-E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F527-I/SO | PIC16F527T-E/SO | PIC16F526-I/SO | PIC16F506-E/SO | PIC16F527-E/JP |
|---|---|---|---|---|---|---|
| Package | 20-SOIC (SO) | 20-SOIC (SO) - same | 20-SOIC (SO) - same | 20-SOIC (SO) - same | 20-SOIC (SO) - same | 20-SOIC (SO) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 1.5 KB flash | 1.5 KB flash | 1.5 KB flash | 1.0 KB flash (-33%) | 1.5 KB flash | 1.5 KB flash |
| Maximum CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Internal Op-Amps | 2 | 2 | 2 | 0 (external required) | 0 (external required) | 2 |
| Comparators | 2 | 2 | 2 | 2 | 1 | 2 |
| ADC Resolution | 8-bit | 8-bit | 8-bit | 8-bit | 8-bit | 8-bit |
| Operating Temperature | -40 °C to +125 °C (Extended) | -40 °C to +85 °C (Industrial) | -40 °C to +125 °C (Extended) | -40 °C to +85 °C (Industrial) | -40 °C to +125 °C (Extended) | -40 °C to +125 °C (Extended) |
| Supply Voltage Range | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
Key Differentiators
- Two integrated op-amps eliminate external signal-conditioning ICs (vs PIC16F526-I/SO)
- Extended -40 °C to +125 °C automotive-grade temperature range (vs PIC16F527-I/SO)
- 1.5 KB flash provides 50% more program memory than PIC16F526 (vs PIC16F526-I/SO)
- Dual comparators with programmable internal reference (vs PIC16F506-E/SO)
Design Notes
Estimated: at 20 MHz active, VDD = 5.0 V, the PIC16F527 draws approximately 5-7 mA, dropping to <1 µA in sleep mode. Place a 10 µF tantalum + 0.1 µF ceramic decoupling pair within 5 mm of VDD pin 7, and a separate 0.1 µF ceramic on AVSS/VSS. The analog supply (AVDD, if separate on the package variant) and VDD must be tied to the same rail with their own decoupling. Brown-out detection should be enabled in the configuration word for unattended deployments to prevent undefined behavior during supply droops below 2.0 V.
Route the ICSP signals (RB6/ICSPDAT, RB7/ICSPCLK, MCLR/VPP) to an in-line 5-pin header or test pad array, keeping the trace length under 50 mm to ensure reliable in-circuit programming. Place the ICSP connector at the board edge for production programming access. The MCLR pin should have a 10 kΩ pull-up to VDD and a 100 nF capacitor to ground for reset signal integrity, but during ICSP the programmer drives this pin directly - verify the series resistance does not impede VPP rise time. Source: Microchip ICSP application note.
Configuration word must be programmed BEFORE first flash verification - an unprogrammed configuration word leaves the oscillator in an undefined state and watchdog disabled. Watchdog timer must be either explicitly enabled with a periodic CLRWDT in firmware or explicitly disabled in the configuration word - leaving the WDT setting at default can cause unexpected resets. Code protection bits should be set to prevent unauthorized flash read-out in production. The internal 4 MHz oscillator has ±2% accuracy after factory calibration, which is insufficient for UART baud rates above 9600 without software compensation or a crystal.
The integrated op-amps have unity-gain bandwidth of approximately 1-3 MHz (per datasheet) and are not intended for high-frequency signals - keep analog bandwidth below 100 kHz for clean operation. Route analog input traces away from digital switching nodes (PWM outputs, oscillator traces) using a ground-guard trace tied to AVDD ground. The ADC requires a minimum acquisition time of approximately 20 µs at 5 V for full 8-bit accuracy - check datasheet AC characteristics table for exact tACQ vs VDD and adjust ADCON0 timing accordingly.
Compliance Information
RoHS and REACH compliant per Microchip product declaration. -E temperature grade supports automotive environments but the part is NOT AEC-Q100 PPAP-qualified - for safety-critical subsystems, use PIC16F1xxx enhanced family. Lead-free and halogen-free packaging. Conflict-minerals declaration on file with Microchip.
