PIC16F1508T-I/SS - 8-bit 20MHz MCU, 7KB Flash, SSOP-20 | Microchip
MPN: PIC16F1508T-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.82 | $0.82 |
| 10 | $0.78 | $7.80 |
| 100 | $0.71 | $71.00 |
| 500 | $0.66 | $330.00 |
| 1,000 | $0.62 | $620.00 |
| 3,000 | $0.58 | $1,740.00 |
PIC16F1508T-I/SS Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory (Flash), working RAM, and a configurable set of peripherals (ADC, timers, communication ports) on one silicon die. Within the broader taxonomy, this part is an 8-bit microcontroller -> embedded controller -> CMOS flash MCU -> semiconductor. Microchip's PIC16F mid-range family is widely used as the system brain for low-power and cost-sensitive embedded products.
Key features that differentiate the PIC16F1508 include the nanoWatt XLP extreme-low-power technology for battery-friendly designs, four Configurable Logic Cells (CLC) for hardware glue logic, a Complementary Waveform Generator (CWG) for motor and power control, a Numerically Controlled Oscillator (NCO) for precise frequency generation, and a 10-bit Analog-to-Digital Converter (ADC) with internal fixed-voltage reference. Together, these peripherals let one chip replace several discrete analog and timer ICs in compact designs.
Typical applications include consumer white goods, LED lighting controllers, sensor signal conditioning, low-power IoT nodes, small motor control (fans, pumps), and battery-operated handheld products. Designers favor this part when footprint, energy budget, and BOM cost are the dominant constraints rather than raw CPU throughput. One practical design tip: respect the 3.6 V absolute maximum on VDD, route the AVSS/AVDD pair as a star to the analog reference when using the ADC, and use the CWG + NCO pair to synthesize accurate PWM and frequency outputs without burdening the CPU.
This page synthesizes Microchip's PIC16F1508 datasheet, distributor pricing tiers, drop-in same-package alternatives, and practical design notes that are not consolidated in any single manufacturer or distributor document.
Drop-in alternatives for PIC16F1508T-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 PIC16F1508T-I/SS (same form factor and footprint) — differing in Package, Program Memory (Flash), ADC, Timers, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1508-I/SS
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →PIC16F1508-I/SO
✅ Drop-In✓ In Stock
$0.92 / Unit
View Datasheet →PIC16F1508-I/P
✅ Drop-In✓ In Stock
$1.04 / Unit
View Datasheet →PIC16F1507-I/SO
✅ Drop-In✓ In Stock
$0.92 / Unit
View Datasheet →PIC16F1509T-I/SS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.05 / Unit
View Datasheet →PIC16F1459-I/SS
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →PIC16F1508T-I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 enhanced mid-range (RISC), 8-bit data path, 14-bit instruction word |
| Program Memory (Flash) | 7 KB (4K x 14) |
| Data RAM | 256 bytes |
| Maximum CPU Frequency | 20 MHz (200 ns instruction cycle) |
| Operating Voltage (VDD) | 1.8 V to 3.6 V |
| I/O Pins | 18 |
| ADC | 10-bit, multiple channels |
| Configurable Logic Cells (CLC) | 4 |
| Complementary Waveform Generator (CWG) | 1 |
| Numerically Controlled Oscillator (NCO) | 1 |
| Low-Power Technology | nanoWatt XLP |
| Operating Temperature | -40C to +85C (Industrial, 'I' suffix) |
| Package | 20-pin SSOP (Shrink Small Outline Package) |
| Shipping Format | Tape & Reel ('T' suffix) |
| RoHS Status | Compliant (per Microchip product family convention) |
PIC16F1508T-I/SS Pin Configuration
| Pin 1 | RA3/AN3/C1IN+/C2IN+/VREF+ — Bidirectional I/O / analog input / comparator input / ADC voltage reference positive |
| Pin 2 | RA4/AN4/C1IN-/C2IN-/VREF- — Bidirectional I/O / analog input / comparator input / ADC voltage reference negative |
| Pin 3 | RA5/MCLR/VPP — Bidirectional I/O / Master Clear (reset, active low) / programming voltage |
| Pin 4 | RA0/AN0/C1IN0-/C2IN0-/ICSPDAT — Bidirectional I/O / analog input / comparator input / ICSP data |
| Pin 5 | RA1/AN1/C1IN1-/C2IN1-/ICSPCLK — Bidirectional I/O / analog input / comparator input / ICSP clock |
| Pin 6 | RA2/AN2/T0CKI/C1IN0+/C2IN0+ — Bidirectional I/O / analog input / Timer0 clock input / comparator input |
| Pin 7 | VDD — Positive supply (1.8 V to 3.6 V) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RA7/OSC1/CLKIN — Bidirectional I/O / crystal oscillator input / external clock input |
| Pin 10 | RA6/OSC2/CLKOUT — Bidirectional I/O / crystal oscillator output / clock output |
| Pin 11 | RC0/SCL/SCK — Bidirectional I/O / I2C clock / SPI clock |
| Pin 12 | RC1/SDA/SDI — Bidirectional I/O / I2C data / SPI data in |
| Pin 13 | RC2/SDO — Bidirectional I/O / SPI data out |
| Pin 14 | RC3/SS — Bidirectional I/O / SPI slave select |
| Pin 15 | RC4/C2OUT — Bidirectional I/O / Comparator 2 output |
| Pin 16 | RC5/CCP1/P1A — Bidirectional I/O / Capture-Compare-PWM / PWM output |
| Pin 17 | RC6/C1OUT/TX/CK — Bidirectional I/O / Comparator 1 output / USART transmit / clock |
| Pin 18 | RC7/RX/DT — Bidirectional I/O / USART receive / data |
| Pin 19 | RB4/AN10/SDI2 — Bidirectional I/O / analog input / SPI data in (alt) |
| Pin 20 | RB5/AN11/RX2 — Bidirectional I/O / analog input / USART receive (alt) |
Typical Applications
PIC16F1508T-I/SS is suitable for 6 applications: Low-Power IoT Sensor Nodes, Consumer White Goods and Small Appliance Control, LED Lighting Controllers, Small Motor and Fan Control, Portable Medical and Wellness Devices, Automotive Body and Accessory Electronics (Sub-System).
Low-Power IoT Sensor Nodes
The PIC16F1508T-I/SS is well suited to wireless sensor nodes because its 1.8 V to 3.6 V supply range pairs with single-cell coin or lithium batteries, while nanoWatt XLP technology places sleep current into the microamp range, preserving battery life across months of duty-cycled operation. With 7 KB of Flash and 256 bytes of RAM, the device fits typical sensor-fusion and transmit-scheduling firmware. The on-chip 10-bit ADC handles analog sensor channels without an external converter, and the four Configurable Logic Cells (CLC) implement hardware event triggers that wake the CPU only when a meaningful threshold is crossed. Compared with a discrete op-amp plus timer design, the integrated peripherals reduce BOM and PCB area.
Recommended
Consumer White Goods and Small Appliance Control
In washing machines, coffee makers, and countertop appliances, the PIC16F1508T-I/SS provides the central control brain with 18 I/O pins for keypads, relays, triac drivers, and indicator LEDs. The 20 MHz core supports 200 ns instruction execution for tight control loops on motor and heater sequencing, while the on-chip Complementary Waveform Generator (CWG) produces dead-band-corrected PWM signals for triac and MOSFET gate drive. Industrial -40C to +85C temperature grade covers kitchen and laundry environments. Compared with a discrete 555-timer-based analog board, the integrated CWG plus ADC simplifies EMC compliance and reduces component count.
Recommended
LED Lighting Controllers
LED drivers and color-mixing controllers benefit from the PIC16F1508T-I/SS's Numerically Controlled Oscillator (NCO) and Complementary Waveform Generator (CWG), which together synthesize high-resolution PWM frequencies with hardware-accurate duty cycles for dimming and color-temperature mixing without CPU overhead. The 10-bit ADC reads photo-sensors and potentiometers for ambient feedback, while the 18 I/O lines drive multiple LED channels, keypad, and serial interface. Operating from 1.8 V to 3.6 V supports both battery-powered and USB-powered luminaires. Compared with a 555 + op-amp analog design, the integrated digital control simplifies firmware-based dim curves and DMX or BLE add-on links.
Recommended
Small Motor and Fan Control
The PIC16F1508T-I/SS is a strong fit for brushed DC, stepper, and small BLDC motor pre-drivers using the on-chip Complementary Waveform Generator (CWG) for dead-band-protected complementary PWM and the Numerically Controlled Oscillator (NCO) for precise commutation timing. The 20 MHz core closes current and speed control loops at sub-microsecond intervals. With 18 I/O pins, the MCU simultaneously drives gate drivers, Hall-effect sensor inputs, tachometer feedback, and an operator interface. Compared with a discrete analog PWM controller, firmware reconfigurability enables multiple motor profiles in a single design.
Recommended
Portable Medical and Wellness Devices
Battery-powered thermometers, pulse oximeters, and personal wellness monitors take advantage of the PIC16F1508T-I/SS's nanoWatt XLP technology to extend runtime on coin cells, and the 10-bit ADC delivers sufficient resolution for temperature, photodiode, and bio-impedance front-ends. The 256-byte RAM is adequate for moving-average filters on biosignals, and 7 KB of Flash accommodates small protocol stacks. With 1.8 V minimum VDD, the device can run directly from a single alkaline or silver-oxide cell without boost circuitry. Compared with ASIC-based designs, this MCU shortens certification cycles by allowing firmware adjustments late in development.
Recommended
Automotive Body and Accessory Electronics (Sub-System)
While the PIC16F1508T-I/SS is industrial-grade rather than AEC-Q100 qualified, it fits non-safety automotive sub-systems such as interior lighting, accessory controllers, and aftermarket modules. The 18 I/O pins handle LED drivers, switches, and LIN or serial links to a vehicle bus. The 1.8 V to 3.6 V supply supports operation from a regulated 3.3 V rail commonly derived from the vehicle battery. The CWG simplifies PWM-controlled dimming and the CLC replaces small glue-logic ICs. For AEC-Q100 requirements, Microchip offers automotive-graded PIC16F1xxx variants in the same SSOP-20 footprint.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1508T-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1508-I/SS | PIC16F1508-I/SO | PIC16F1507-I/SO | PIC16F1459-I/SS |
|---|---|---|---|---|---|
| Package | SSOP-20 | SSOP-20 (same) | SSOP-20 (same) | SSOP-20 (same) | SSOP-20 (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum CPU Frequency | 20 MHz | 20 MHz (same) | 20 MHz (same) | 20 MHz | 20 MHz |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V (same) | 1.8 V to 3.6 V (same) | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Shipping Format | Tape & Reel | Tube | Tube | Tube | Tube |
| Low-Power Technology | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP |
Key Differentiators
- Integrated Configurable Logic Cells (CLC), CWG, and NCO peripherals (vs PIC16F1459-I/SS)
- 20-pin SSOP with 18 I/O pins in a compact footprint (vs PIC16F1507-I/SO)
- Tape-and-reel shipping for high-volume SMT assembly (vs PIC16F1508-I/SS)
Design Notes
The PIC16F1508T-I/SS operates from 1.8 V to 3.6 V on VDD. Place a 100 nF decoupling capacitor within 5 mm of the VDD pin and a bulk 1 uF to 10 uF tantalum or ceramic capacitor at the regulator output. Tie the MCLR/VPP pin to VDD through a 10 kohm pull-up to avoid spurious resets; only pull MCLR low with an open-drain driver or momentary switch for a manual reset. The ADC reference (VREF+/VREF-) should be tied to a quiet analog rail rather than the digital VDD whenever ADC accuracy matters.
Estimated: at typical MCU activity factors of 30-50% at 20 MHz and 3.3 V VDD, total device dissipation is well under 50 mW and self-heating is negligible for SSOP-20 thermal resistance. The dominant thermal design consideration is the board copper area around the SSOP-20 paddle-less package; do not rely on the package leadframe alone to dissipate heat. In enclosed designs, derate by maintaining ambient below 70C for reliable industrial-temperature operation.
Do not program the configuration bits to disable MCLR without providing an external reset supervisor; lockouts become very difficult to recover from without ICSP. Reserve the ICSPDAT and ICSPCLK pins (RA0/RA1) for the programming interface if you plan to field-update firmware - avoid reassigning them to high-current outputs that could conflict with the programmer. When using the CLC, CWG, or NCO peripherals, remember that they are mapped to specific pins; consult the datasheet pin allocation table rather than assuming any GPIO is reachable by any peripheral.
Keep the 20 MHz crystal or external clock traces short (<10 mm) and guard them with a ground pour on both sides of the SSOP-20. Route the analog ADC inputs (RA0-RA5) away from the PWM outputs (RC5/CCP1 and the CWG outputs) to minimize digital-to-analog crosstalk. If the design uses the internal oscillator, leave RA6/RA7 available for GPIO; if you use an external crystal, RA6/RA7 are dedicated and cannot be repurposed. Place the decoupling loop area as small as possible to keep switching transients off the analog rail.
Compliance Information
RoHS compliant and lead-free per Microchip product family declarations. Not AEC-Q100 qualified; choose a Microchip automotive-graded PIC16F1xxx variant for AEC-Q100 applications. REACH compliance follows Microchip's standard statement. Halogen-free status not explicitly stated in the provided data.
