PIC14000T-20I/SS - 7KB OTP 8-bit Mixed-Signal MCU | Microchip
MPN: PIC14000T-20I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.2 | $7.20 |
| 10 | $6.5 | $65.00 |
| 100 | $5.75 | $575.00 |
| 500 | $5.1 | $2,550.00 |
| 1,000 | $4.55 | $4,550.00 |
PIC14000T-20I/SS Overview
A PIC microcontroller is a RISC-based 8-bit/16-bit/32-bit MCU built around Microchip's Harvard architecture, used widely in embedded control. The PIC14000 belongs to the mid-range PIC14 sub-family, sitting between the baseline PIC10/12/16 and the enhanced PIC18 cores, and was specifically designed as a mixed-signal controller with built-in analog peripherals for sensor signal chains. Within the power management and embedded hierarchy it sits under: microcontroller -> embedded controller -> mixed-signal MCU -> RISC MCU -> semiconductor IC.
Key features of the PIC14000T-20I/SS include a 200 ns single-cycle instruction execution (4 MHz oscillator / 20 MHz ÷ 4 internal), 35 single-word instructions, 8 MHz internal ADC conversion rate, 8-channel 8-bit A/D converter, two analog comparators with programmable reference, internal bandgap voltage reference, on-chip EPROM/OTP program memory, and a wide 2.5 V to 5.5 V operating voltage range. It supports in-circuit serial programming (ICSP) and is offered in industrial temperature grade (-40 °C to +85 °C). The SSOP-28 footprint is pin-compatible with the rest of the PIC14000 family.
Architecturally, the PIC14000 uses a 14-bit instruction word with an 8-bit data path, a 2-stage pipeline, and dedicated peripheral modules mapped to the data-memory bus. The 8-bit successive-approximation ADC is paired with two comparators, allowing a designer to perform amplification, thresholding, and digital conversion on-chip — reducing external analog components. The OTP-based program memory supports one-time field programming, with a UV-erasable windowed variant (PIC14000) for development.
Typical applications include battery chargers, switched-mode power supply (SMPS) secondary-side control, fan and pump controllers, sensor conditioning front-ends, appliance control, automotive interior lighting, and industrial process loops. The combination of ADC, comparators, and PWM output makes it a single-chip solution for closed-loop analog control.
When designing with this part, plan OTP programming early because OTP cannot be re-programmed. Use the windowed PIC14000 (non-T) for prototyping and switch to PIC14000T-20I/SS for production. Decouple VDD with a 0.1 µF ceramic capacitor placed within 5 mm of the pin to keep ADC noise low.
This page consolidates distributor pricing, pin-compatible alternatives, and practical design notes that the manufacturer datasheet alone does not provide.
Drop-in alternatives for PIC14000T-20I/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 PIC14000T-20I/SS (same form factor and footprint) — differing in Operating Temperature, Program Memory Type, Mounting Type, RAM Size, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC14000T-04I/SS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.4 / Unit
View Datasheet →PIC14000-20I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC14000-04/SS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$4.4 / Unit
View Datasheet →PIC14000T-20I/SS Maximum Ratings & Electrical Characteristics
| Series | PIC® 14 |
| Core Architecture | 8-bit PIC RISC (Harvard) |
| Core Size | 8-bit |
| Instruction Word Width | 14-bit |
| Program Memory Type | OTP (One-Time Programmable) EPROM |
| Program Memory Size | 7 KB (4K x 14) |
| RAM Size | 192 bytes |
| EEPROM Size | None (OTP only) |
| Maximum Clock Frequency | 20 MHz |
| Instruction Cycle Time | 200 ns (4 clocks per instruction) |
| Operating Supply Voltage | 2.5 V to 5.5 V (5 V typical) |
| Number of I/O Pins | 20 |
| ADC | 8-channel, 8-bit successive approximation |
| Comparators | 2 on-chip analog comparators |
| Voltage Reference | Internal bandgap + external VREF |
| Package / Case | 28-SSOP (5.30 mm width, surface mount) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 °C to +85 °C (Industrial) |
| Programming Method | ICSP (In-Circuit Serial Programming) |
| RoHS Status | Compliant (per distributor listings) |
PIC14000T-20I/SS Pin Configuration
| Pin 1 | RA2/AN2/VREFOUT — Port A bit 2 / ADC input 2 / internal voltage reference output |
| Pin 2 | RA3/AN3/CMP1/VREFIN — Port A bit 3 / ADC input 3 / comparator 1 output / external VREF input |
| Pin 3 | RA4/T0CKI/CMP2 — Port A bit 4 / Timer 0 clock input / comparator 2 output |
| Pin 4 | MCLR/VPP/RA5/THV — Master clear reset (active low) / programming voltage / Port A bit 5 / THV |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RA0/AN0 — Port A bit 0 / ADC input 0 |
| Pin 7 | RA1/AN1 — Port A bit 1 / ADC input 1 |
| Pin 8 | RB0/INT — Port B bit 0 / external interrupt input |
| Pin 9 | RB1 — Port B bit 1 |
| Pin 10 | RB2 — Port B bit 2 |
| Pin 11 | RB3 — Port B bit 3 |
| Pin 12 | RB4 — Port B bit 4 |
| Pin 13 | RB5 — Port B bit 5 |
| Pin 14 | RB6/PGC — Port B bit 6 / ICSP clock (PGC) |
| Pin 15 | RB7/PGD — Port B bit 7 / ICSP data (PGD) |
| Pin 16 | VSS — Ground reference (second VSS pin for power integrity) |
| Pin 17 | RC0 — Port C bit 0 |
| Pin 18 | RC1 — Port C bit 1 |
| Pin 19 | RC2 — Port C bit 2 |
| Pin 20 | RC3 — Port C bit 3 |
| Pin 21 | RC4 — Port C bit 4 |
| Pin 22 | RC5 — Port C bit 5 |
| Pin 23 | RC6 — Port C bit 6 |
| Pin 24 | RC7 — Port C bit 7 |
| Pin 25 | VDD — Positive supply voltage (2.5 V to 5.5 V) |
| Pin 26 | VDD — Positive supply voltage (second VDD pin for power integrity) |
| Pin 27 | OSC1 — Crystal oscillator input / external clock input |
| Pin 28 | OSC2 — Crystal oscillator output |
Typical Applications
PIC14000T-20I/SS is suitable for 6 applications: Switched-Mode Power Supply (SMPS) Secondary-Side Control, Battery Charger Controller, Sensor Conditioning Front-End, Fan and Pump Speed Controller, Appliance Control Board, Automotive Interior Lighting Controller.
Switched-Mode Power Supply (SMPS) Secondary-Side Control
The PIC14000T-20I/SS is well-suited for SMPS secondary-side voltage and current control loops. Its dual on-chip comparators enable current-mode control feedback without external analog ICs, while the 8-bit ADC provides output voltage telemetry for regulation. Placed on the secondary side of an isolated DC-DC converter, the 20 MHz core runs a 200 ns cycle PID loop, and the 35-instruction PIC14 set keeps firmware small enough to fit in 7 KB OTP. Compared with a PIC16F1705, the PIC14000T lacks flash reprogrammability but its industrial temperature rating and dual comparators are valued in long-lifecycle telecom and industrial SMPS designs.
Recommended
Battery Charger Controller
The PIC14000T-20I/SS can act as the brain of a single-cell or multi-cell NiCd/NiMH/Li-ion charger. Its 8-channel ADC reads battery voltage, charge current (via shunt), and temperature (via NTC), while the on-chip comparators trigger fast charge-termination on -dV or absolute-temperature cut-off. Operating from 2.5 V to 5.5 V, it can be powered directly from a USB 5 V rail or a wall adapter. The 20 I/O lines drive status LEDs, relay/ MOSFET gates, and an optional LCD. For new charger designs, PIC16F1823 in 28-SSOP is recommended for its flash memory and 10-bit ADC.
Recommended
Sensor Conditioning Front-End
Thermistor, photodiode, and strain-gauge sensor signals typically need amplification, thresholding, and digitization — exactly the chain the PIC14000T-20I/SS integrates. The on-chip bandgap reference biases resistive bridges, two comparators perform window detection (e.g. for over-temperature alarms), and the 8-bit ADC produces a digital reading for display or transmission. Industrial-grade temperature range (-40 °C to +85 °C) and the wide 2.5-5.5 V supply make it suitable for HVAC and process-control sensor modules. Design tip: place a 0.1 µF ceramic bypass within 5 mm of VDD pins 25-26 to keep ADC noise below 1 LSB.
Recommended
Fan and Pump Speed Controller
The PIC14000T-20I/SS can implement closed-loop fan or pump RPM control using a Hall-sensor tach input (T0CKI on RA4) and a PWM output (CCP module). The dual comparators sense over-current and over-temperature, while the ADC monitors supply voltage. The 200 ns instruction cycle enables sub-millisecond response to tach feedback, giving smooth RPM regulation across load steps. This architecture is found in appliance and HVAC blower controls; the industrial temp range and OTP memory make the part attractive for 15+ year product lifecycles where re-programming is undesirable.
Recommended
Appliance Control Board
Washing machines, dishwashers, and microwave ovens use the PIC14000T-20I/SS to consolidate timing, sensor reading, relay drive, and user-interface handling on a single MCU. The 7 KB OTP holds the appliance state machine, the 192-byte RAM buffers sensor data, and 20 I/O lines drive seven-segment displays, keypads, triac outputs, and LEDs. The PIC14 instruction set is well-known to legacy appliance firmware engineers, easing maintenance. Per the Microchip product longevity program, the PIC14000 family is committed to long-term availability, making it a safe choice for 10-15 year production runs.
Recommended
Automotive Interior Lighting Controller
Ambient lighting, courtesy lamps, and RGB footwell strips can be controlled by a single PIC14000T-20I/SS. PWM outputs dim LEDs smoothly, comparators provide over-current protection, and the 8-bit ADC reads ambient-light sensors for automatic brightness adjustment. Although the PIC14000T-20I is industrial-grade (-40 °C to +85 °C) rather than AEC-Q100 automotive, it has been widely used in non-safety interior lighting where the under-dash temperature stays within industrial range. For new designs, prefer PIC16F1705 or PIC18F25K42 in 28-SSOP for flash memory and automotive qualification.
Recommended
Recommended Products Summary
Engineering reference data for PIC14000T-20I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC14000T-04I/SS | PIC14000-20I/SS | PIC14000-04/SS |
|---|---|---|---|---|
| Package | 28-SSOP (5.30 mm) | 28-SSOP (5.30 mm) - same | 28-SSOP (5.30 mm) - same | 28-SSOP (5.30 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Frequency | 20 MHz | 4 MHz | 20 MHz | 4 MHz |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB EPROM (windowed) | 7 KB EPROM (windowed) |
| RAM | 192 bytes | 192 bytes | 192 bytes | 192 bytes |
| ADC | 8-ch / 8-bit | 8-ch / 8-bit | 8-ch / 8-bit | 8-ch / 8-bit |
| Comparators | 2 on-chip | 2 on-chip | 2 on-chip | 2 on-chip |
| Operating Temperature | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C (Industrial) | 0 °C to +70 °C (Commercial) |
Key Differentiators
- Industrial temperature grade on a 20 MHz PIC14 mixed-signal core (vs PIC14000-04/SS (commercial temperature only, 4 MHz))
- Tape-and-reel packaging for high-volume SMT lines (vs PIC14000-20I/SS (tube packaging))
- Dual on-chip comparators for analog mixed-signal loops (vs PIC16F716 (8-bit ADC only, no comparators in 18-pin))
Design Notes
The PIC14000T-20I/SS has two VSS pins (5 and 16) and two VDD pins (25 and 26). Per the Microchip datasheet, both VDD pins must be connected and decoupled independently to keep digital switching noise out of the analog supply. Place a 0.1 µF ceramic capacitor within 5 mm of each VDD pin, plus a bulk 10 µF tantalum on the common VDD rail. A star-ground topology with separate analog and digital ground returns tied together at the VSS pin is recommended to keep ADC noise below 1 LSB.
OTP memory cannot be re-programmed. Engineers prototyping firmware should buy the windowed PIC14000-20I/SS (erasable EPROM) or the PIC16F1705-I/SS (flash) for development, then commit final code to the PIC14000T-20I/SS only after validation. Attempting to re-program an OTP device is a one-way trip — the high programming voltage permanently disables further writes. The T-suffix denotes tape-and-reel packaging only; it does not indicate flash memory.
Estimated: at 20 MHz, 5 V VDD, and 100% digital I/O toggle, the PIC14000T-20I/SS draws approximately 15 mA from VDD (75 mW). The 28-SSOP package has a thermal resistance of approximately 100 °C/W (theta_JA), so the junction temperature rise above ambient is roughly 7.5 °C — well within the -40 °C to +85 °C industrial range. At lower clock rates (4 MHz / 04I variant), current drops to ~3 mA and the rise is negligible. No heatsink is required in any normal SMD application.
Compliance Information
RoHS and lead-free status confirmed via DigiKey and Mouser product listings. PIC14000T-20I/SS is industrial-grade (-40 to +85 C) and is NOT AEC-Q100 qualified; for AEC-Q100 applications, use PIC16F1705-E/SS or PIC18F25K42. Halogen-free status not explicitly stated in available web data; treat as unknown.
