PIC14000-20/SS - 8-Bit 20MHz Mixed-Signal MCU, 7KB OTP, 28-SSOP | Microchip
MPN: PIC14000-20/SS ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.05 | $6.05 |
| 10 | $5.42 | $54.20 |
| 100 | $4.81 | $481.00 |
| 500 | $4.25 | $2,125.00 |
| 1,000 | $3.78 | $3,780.00 |
PIC14000-20/SS Overview
A mixed-signal microcontroller combines a digital microcontroller core with integrated analog peripherals such as ADCs, DACs, voltage references, and current sources on a single silicon die. This category, often called a Programmable Mixed Signal Controller (PMSC), sits within the broader hierarchy of microcontroller -> embedded controller -> semiconductor IC. Mixed-signal MCUs are widely used in closed-loop control, sensor signal conditioning, and power-management applications where a few analog channels are needed without the cost of a separate ADC chip.
The PIC14000 integrates a 16-bit Sigma-Delta slope ADC, an on-chip temperature sensor, a bandgap voltage reference, a 4-bit programmable current source, a programmable reference generator, a low-voltage detector (LVD), and a voltage regulator control output. This analog integration reduces bill-of-materials count in closed-loop systems. The PIC RISC architecture executes instructions in 200 ns at 20 MHz, with all instructions single-cycle except program branches (two-cycle), and only 35 single-word instructions to learn.
Typical applications include SMPS primary-side control, battery chargers, sensor signal conditioning, programmable current sources, industrial process controllers, and intelligent power management modules. The combination of OTP program memory, internal oscillator, and integrated voltage regulation makes the PIC14000 suited for cost-sensitive industrial designs.
Designers should note that the PIC14000 is flagged as Not Recommended for new designs by Microchip. Existing designs may continue using the part, but new projects should evaluate PIC16 or PIC18 alternatives from Microchip's current portfolio. Decoupling, analog ground isolation, and adequate PCB thermal relief around the SSOP-28 pad are recommended for the 28-SSOP package.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC14000-20/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 PIC14000-20/SS (same form factor and footprint) — differing in Package, Program Memory Type, Operating Temperature, Mounting Type, Program Memory Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC14000-20I/SS
✅ Drop-In✓ In Stock
$5.36 / Unit
View Datasheet →PIC14000-04/SS
✅ Drop-In✓ In Stock
$4.4 / Unit
View Datasheet →PIC14000T-20/SS
✅ Drop-In✓ In Stock
$2.62 / Unit
View Datasheet →PIC14000-20I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC14000-20/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 7 KB (4K x 14) |
| RAM Size | 192 bytes |
| Maximum CPU Frequency | 20 MHz |
| Instruction Cycle Time | 200 ns |
| Number of I/O Pins | 20 |
| ADC Type | 16-bit Sigma-Delta slope converter |
| On-chip Analog Peripherals | Bandgap reference, temperature sensor, programmable current source, programmable reference generator, LVD, voltage regulator control |
| Package | 28-SSOP (0.209" / 5.30 mm width) |
| Operating Temperature Range | 0C to +70C (commercial grade) |
| Mounting Type | Surface Mount |
| Lifecycle Status | Not Recommended for new designs (NRND) |
PIC14000-20/SS Pin Configuration
| Pin 1 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| Pin 2 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| Pin 3 | RA2/AN2 — Port A bit 2 / Analog input 2 |
| Pin 4 | RA3/AN3 — Port A bit 3 / Analog input 3 |
| Pin 5 | RA4/AN4 — Port A bit 4 / Analog input 4 |
| Pin 6 | RA5/AN5 — Port A bit 5 / Analog input 5 |
| Pin 7 | VDD — Positive supply voltage |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1 — Oscillator input / external clock |
| Pin 10 | OSC2 — Oscillator output |
| Pin 11 | RC0 — Port C bit 0 (digital I/O) |
| Pin 12 | RC1 — Port C bit 1 (digital I/O) |
| Pin 13 | RC2 — Port C bit 2 (digital I/O) |
| Pin 14 | RC3 — Port C bit 3 (digital I/O) |
| Pin 15 | RC4 — Port C bit 4 (digital I/O) |
| Pin 16 | RC5 — Port C bit 5 (digital I/O) |
| Pin 17 | RC6 — Port C bit 6 (digital I/O) |
| Pin 18 | RC7 — Port C bit 7 (digital I/O) |
| Pin 19 | VREG — Voltage regulator control output |
| Pin 20 | RB0 — Port B bit 0 (digital I/O) |
| Pin 21 | RB1 — Port B bit 1 (digital I/O) |
| Pin 22 | RB2 — Port B bit 2 (digital I/O) |
| Pin 23 | RB3 — Port B bit 3 (digital I/O) |
| Pin 24 | RB4 — Port B bit 4 (digital I/O) |
| Pin 25 | RB5 — Port B bit 5 (digital I/O) |
| Pin 26 | RB6 — Port B bit 6 (digital I/O) |
| Pin 27 | RB7 — Port B bit 7 (digital I/O) |
| Pin 28 | MCLR — Master clear reset (active low) |
Typical Applications
PIC14000-20/SS is suitable for 7 applications: SMPS Primary-Side Digital Control, Battery Charger Controllers, Industrial Process Sensor Conditioning, Programmable Current Source Modules, Smart Power Management Modules, Closed-Loop LED Lighting Drivers, Automotive Sensor Interface Modules.
SMPS Primary-Side Digital Control
The PIC14000-20/SS fits SMPS primary-side control with its 16-bit Sigma-Delta ADC measuring primary current/voltage and its integrated voltage regulator control output driving the MOSFET gate. The 20 MHz clock provides 200 ns instruction cycle - sufficient for sub-microsecond loop response in quasi-resonant flyback converters. Its 7 KB OTP holds state-machine firmware and lookup tables, while the 192-byte RAM accommodates ADC sample buffers and control variables. Compared to discrete analog controllers, the PIC14000 reduces BOM by replacing the op-amp error amplifier, comparator, and PWM generator with firmware-defined equivalents.
Recommended
Battery Charger Controllers
Battery charger designs benefit from the PIC14000-20/SS integrated Sigma-Delta ADC for precise charge current/voltage measurement, the bandgap voltage reference for accurate termination thresholds, and the programmable current source for setting CC/CV charge profiles. The 20 MHz CPU executes charging algorithms in real time, while the LVD monitors input brownout conditions. Designers use the 7 KB OTP to implement Li-ion, NiMH, or lead-acid charging state machines. Compared to using a separate ADC + op-amp + MCU, the PIC14000 consolidates the analog front-end and digital control into one chip.
Recommended
Industrial Process Sensor Conditioning
The PIC14000-20/SS serves sensor signal conditioning boards with its 16-bit Sigma-Delta ADC digitizing low-level sensor outputs (thermocouples, RTDs, strain gauges) directly. The on-chip temperature sensor provides cold-junction compensation for thermocouple measurements, while the bandgap reference stabilizes ADC readings across -40C to +85C industrial range. The 20 MHz CPU runs linearization, filtering, and calibration algorithms. The 7 KB OTP holds lookup tables for sensor-specific compensation curves, reducing calibration cost. Compared to dedicated ADC ICs, the PIC14000 adds programmable local intelligence.
Recommended
Programmable Current Source Modules
The PIC14000-20/SS integrates a 4-bit programmable current source enabling digitally-set constant-current outputs for LED drivers, sensor excitation, or test equipment. Designers set current levels via firmware, allowing multi-range programmability without external DACs. The Sigma-Delta ADC monitors actual current through a sense resistor, closing a feedback loop for high accuracy. The 20 MHz CPU updates current setpoints every 200 ns, enabling fast transient response. The 7 KB OTP stores calibration data and current profiles for different operating modes.
Recommended
Smart Power Management Modules
The PIC14000-20/SS controls intelligent power modules with its voltage regulator control output, on-chip bandgap reference, and low-voltage detector. Firmware implements dynamic voltage scaling, soft-start sequencing, and fault detection. The 20 MHz CPU manages I2C/SPI communication with host systems while monitoring up to 20 digital I/O pins for status signals. Compared to analog power controllers, the PIC14000 enables reconfigurable power profiles via OTP-stored firmware, supporting multiple product variants from one hardware design.
Recommended
Closed-Loop LED Lighting Drivers
The PIC14000-20/SS drives constant-current LED strings with its programmable current source setting LED current, Sigma-Delta ADC measuring photodiode feedback for ambient light compensation, and voltage regulator control output driving the switching converter. The 20 MHz CPU implements PWM dimming and color mixing algorithms. The 7 KB OTP holds dimming curves and thermal foldback profiles. The 28-SSOP package enables compact driver PCB designs. Designers use the LVD to protect against brownout during LED current transients.
Recommended
Automotive Sensor Interface Modules
Note: PIC14000-20/SS is commercial grade (0C to +70C) so for actual automotive applications the PIC14000-20I/SS variant is required. The PIC14000 family supports sensor interface modules with its 16-bit Sigma-Delta ADC conditioning throttle position, pressure, or temperature sensors, the bandgap reference providing stable ADC readings, and 20 digital I/O pins interfacing with vehicle networks. The integrated voltage regulator control simplifies power supply design. Designers use the 7 KB OTP for sensor calibration tables and diagnostic fault codes, enabling OBD-II compliant monitoring.
Recommended
Recommended Products Summary
Engineering reference data for PIC14000-20/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC14000-20I/SS | PIC14000-04/SS | PIC14000T-20/SS | PIC14000-20I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP (same) | 28-SSOP (same) | 28-SSOP (same) | 28-SOIC (different footprint) |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 4 MHz (-80%) | 20 MHz | 20 MHz |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP |
| RAM Size | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes |
| Operating Temperature Range | 0C to +70C (commercial) | -40C to +85C (industrial) | 0C to +70C (commercial) | 0C to +70C (commercial) | -40C to +85C (industrial) |
| Number of I/O Pins | 20 | 20 | 20 | 20 | 20 |
| Lifecycle Status | NRND (Not Recommended for new designs) | NRND | NRND | NRND | NRND |
Key Differentiators
- Integrated 16-bit Sigma-Delta ADC eliminates external ADC chip (vs PIC14000-20I/SS (same die, different temp grade))
- Industrial temperature grade variant available (vs PIC14000-04/SS)
- Faster 20 MHz speed vs slower 4 MHz speed grade (vs PIC14000-04/SS)
Design Notes
The PIC14000-20/SS requires proper decoupling: place a 100 nF ceramic capacitor as close as possible to the VDD pin (pin 7) and a 10 uF bulk capacitor near the supply rail. The integrated voltage regulator control output (pin 19) drives an external pass transistor; refer to the datasheet's typical application circuit for the recommended transistor selection (typically a BJT or MOSFET rated for the load current). For battery-powered designs, use the LVD (Low Voltage Detector) to safely shut down the MCU before VDD drops below the brownout threshold.
The 28-SSOP package has a 0.65 mm pitch - tight but manageable with standard PCB fabrication. Use a ground pour under and around the device to provide thermal relief and a low-impedance return path for the Sigma-Delta ADC. Isolate the analog ground (AGND) from the digital ground (DGND) if the application separates them; connect them at a single point near the VSS pin (pin 8). Place the oscillator crystal or resonator within 1 cm of pins 9-10 to minimize clock noise coupling into the ADC.
The PIC14000-20/SS uses OTP (One-Time Programmable) memory - code cannot be erased or rewritten after programming. Plan firmware carefully and verify on a windowed or flash equivalent before committing to OTP production parts. Note that this part is NRND (Not Recommended for new designs) per Microchip; for new projects, consider the PIC16F1773-I/SN or PIC16F1782-I/SN which provide flash memory and active lifecycle support. The MCLR pin (pin 28) is active-low and must be pulled high for normal operation; a 10 kohm pull-up to VDD is standard.
The 16-bit Sigma-Delta ADC achieves its full resolution only with proper input filtering: use an RC low-pass filter (typically 1 kohm + 100 nF = 1.6 kHz cutoff) on each analog input to prevent aliasing. The on-chip bandgap voltage reference has limited drive capability - do not use it to power external circuits. For high-accuracy measurements, enable the temperature compensation feature to cancel the bandgap's drift across the operating temperature range.
Compliance Information
Compliance status not specified in provided data. Not AEC-Q100 qualified - automotive applications should consult Microchip for qualified alternatives. Lifecycle status is NRND (Not Recommended for new designs) per Microchip product page.
