PIC14000T-04/SO - 8-Bit 4MHz Mixed-Signal MCU, 7KB OTP, 28-SOIC
MPN: PIC14000T-04/SO ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $11.42 | $11.42 |
| 10 | $10.85 | $108.50 |
| 100 | $9.45 | $945.00 |
| 500 | $8.2 | $4,100.00 |
| 1,000 | $7.05 | $7,050.00 |
PIC14000T-04/SO Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and a set of peripherals; the PIC14 line extends that template with analog peripherals such as a sigma-delta A/D slope converter, on-chip temperature sensor, bandgap voltage reference, 4-bit programmable current source, low-voltage detector (LVD), voltage regulator control output, and programmable reference generator. The PIC14000 thus sits in the hierarchy: MCU -> 8-bit microcontroller -> mixed-signal MCU -> PIC14 family -> CMOS OTP-based RISC.
Key differentiating features include an on-chip temperature sensor and bandgap reference that eliminate external analog conditioning, an internal oscillator that reduces external component count, and a 4-bit programmable current source targeted at sensor excitation. The 7 KB OTP allows field-programmed code, while 35 single-word instructions keep the learning curve minimal for code development. The 28-SOIC package supports hand-soldering and standard 0.05-inch-pitch PCB footprints, suiting both prototyping and small-volume production.
Architecturally, the PIC14000 combines a Harvard RISC core with sigma-delta analog front-end, achieving A/D conversion by oversampling rather than using a conventional successive-approximation register (SAR). The 200 ns instruction cycle (5 MHz effective clock / 4 MHz oscillator with internal 4x divider) gives roughly 5 MIPS throughput, and the 35-word instruction set is fully orthogonal. Industrial-grade silicon supports reliable operation in harsh environments.
Typical applications include battery chargers with on-chip current source and temperature-compensated voltage reference, sensor-conditioning front-ends (thermocouple/RTD excitation), closed-loop fan-speed and motor-speed controllers, smart battery management with LVD-driven cutoff, and low-cost mixed-signal instrumentation. The 28-SOIC variant suits through-hole-style hand rework and 0.05" prototype boards.
When designing with the PIC14000T-04/SO, allocate code space carefully within the 7 KB OTP budget, since OTP cannot be erased. Add a 0.1 uF decoupling capacitor close to VDD, and route the MCLR/VPP pin through a 10 kohm pull-up to allow in-circuit serial programming.
This page synthesizes distributor pricing, drop-in PIC14000 family alternatives, application reference circuits, and practical design notes not consolidated on the manufacturer product page or distributor listings.
Drop-in alternatives for PIC14000T-04/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 PIC14000T-04/SO (same form factor and footprint) — differing in Package, Core Architecture, Mounting Type, Program Memory Type, Instruction Execution Time.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC14000-04/SO
✅ Drop-In✓ In Stock
$7.5 / Unit
View Datasheet →PIC14000-04I/SO
✅ Drop-In✓ In Stock
$8.3 / Unit
View Datasheet →PIC14000T-04I/SO
✅ Drop-In✓ In Stock
$7.55 / Unit
View Datasheet →PIC14000-04E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC14000T-04E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC14000T-04/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Instruction Set Width | 14-bit |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 7 KB (4K x 14) |
| CPU Speed | 4 MHz |
| Instruction Execution Time | 200 ns |
| Number of Instructions | 35 single-word |
| Operating Voltage | 3.3 V / 5 V |
| Package | 28-SOIC (0.295", 7.50 mm width) |
| Mounting Type | Surface Mount (Gull-Wing) |
| Temperature Grade | Commercial |
| On-chip A/D Converter | Sigma-Delta slope converter |
| On-chip Temperature Sensor | Yes |
| Bandgap Voltage Reference | Yes (internal) |
| Programmable Current Source | 4-bit |
| Low Voltage Detector (LVD) | Yes |
| Voltage Regulator Control Output | Yes |
| Internal Oscillator | Yes |
| Packaging Form | Tape & Reel (T/R) |
PIC14000T-04/SO Pin Configuration
| Pin 1 | MCLR/VPP/RA5/THV — Master Clear (reset) input / Programming voltage / PORTA bit 5 / THV |
| Pin 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Pin 4 | RA2/AN2/VREFOUT — PORTA bit 2 / Analog input 2 / Voltage reference output |
| Pin 5 | RA3/AN3/CMP1/VREFIN — PORTA bit 3 / Analog input 3 / Comparator 1 / Voltage reference input |
| Pin 6 | RA4/T0CKI/CMP2 — PORTA bit 4 / Timer 0 clock input / Comparator 2 |
| Pin 7 | VDD — Positive supply voltage |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKIN — Oscillator crystal input / External clock input |
| Pin 10 | OSC2/CLKOUT — Oscillator crystal output / Clock output |
| Pin 11 | RC0 — PORTC bit 0 |
| Pin 12 | RC1 — PORTC bit 1 |
| Pin 13 | RC2 — PORTC bit 2 |
| Pin 14 | RC3 — PORTC bit 3 |
| Pin 15 | RC4 — PORTC bit 4 |
| Pin 16 | RC5 — PORTC bit 5 |
| Pin 17 | RC6 — PORTC bit 6 |
| Pin 18 | RC7 — PORTC bit 7 |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RB0/INT — PORTB bit 0 / External interrupt |
| Pin 22 | RB1 — PORTB bit 1 |
| Pin 23 | RB2 — PORTB bit 2 |
| Pin 24 | RB3 — PORTB bit 3 |
| Pin 25 | RB4 — PORTB bit 4 |
| Pin 26 | RB5 — PORTB bit 5 |
| Pin 27 | RB6 — PORTB bit 6 |
| Pin 28 | RB7 — PORTB bit 7 |
Typical Applications
PIC14000T-04/SO is suitable for 6 applications: Battery Charger with Temperature Compensation, Sensor Conditioning Front-End (Thermocouple/RTD), Closed-Loop Fan and Motor Speed Controller, Smart Battery Management with LVD Cutoff, Low-Cost Mixed-Signal Instrumentation, Appliance Control Boards (White Goods).
Battery Charger with Temperature Compensation
The PIC14000T-04/SO fits battery-charger designs because its on-chip 4-bit programmable current source delivers precise charge-current setpoints without external DACs, while the integrated bandgap voltage reference and temperature sensor provide real-time thermal compensation of the charge termination voltage. According to the Microchip PIC14000 datasheet (DS40192E), the LVD block can interrupt charging when VDD collapses below safe thresholds. With 7 KB of OTP program memory, the charger state machine fits comfortably in firmware. Compared with discrete chargers built from op-amps and comparators, the PIC14000 solution reduces BOM count by roughly 60% while enabling I2C/SPI status reporting from the same die.
Recommended
Sensor Conditioning Front-End (Thermocouple/RTD)
The PIC14000T-04/SO is well-suited to thermocouple and RTD signal-conditioning front-ends where the integrated sigma-delta A/D slope converter and on-chip temperature sensor enable cold-junction compensation without external analog components. The 4-bit programmable current source supplies a stable RTD excitation current, eliminating the need for a precision current reference. The 7 KB OTP holds linearization lookup tables for K-type or J-type thermocouples, and the 4 MHz RISC core performs polynomial compensation in real time at typical conversion rates of 100 Hz. This integration lets engineers replace a multi-chip op-amp + ADC + MCU design with a single PIC14000, reducing PCB area and BOM cost.
Recommended
Closed-Loop Fan and Motor Speed Controller
In closed-loop fan-speed and small-motor controllers, the PIC14000T-04/SO uses its voltage regulator control output to drive an external pass transistor or MOSFET, while the LVD and programmable current source enable tachometer feedback and over-current protection. The 200 ns instruction cycle gives the MCU the bandwidth to implement PID loops at PWM frequencies up to 20 kHz without saturating the CPU. With 35 single-word instructions and 7 KB OTP, designers can ship production firmware once and lock it from further modification - a security advantage for OEM appliances. The 28-SOIC package is easily hand-soldered during prototype bring-up and survives standard SMT reflow profiles.
Recommended
Smart Battery Management with LVD Cutoff
The PIC14000T-04/SO supports smart battery-pack designs by combining the on-chip bandgap voltage reference, low-voltage detector (LVD), and 4-bit programmable current source into a single-cell or multi-cell monitor. The LVD threshold is programmable in firmware, allowing the same silicon to ship across multiple battery chemistries. The internal temperature sensor adds pack-temperature telemetry without a separate thermistor A/D channel. With 7 KB OTP code space, engineers can implement SMBus or HDQ communication stacks alongside cell-balancing algorithms. This is an ideal migration target for legacy designs that previously required a separate supervisor IC plus MCU.
Recommended
Low-Cost Mixed-Signal Instrumentation
For low-cost mixed-signal instrumentation such as handheld multimeters, panel meters, and process indicators, the PIC14000T-04/SO provides an integrated sigma-delta A/D, on-chip voltage reference, temperature sensor, and 8-bit MCU in a single 28-SOIC. The 4 MHz core executes RMS, peak-detect, and linearization math fast enough to drive a multiplexed LCD or LED display at a 10 Hz refresh rate. The 4-bit programmable current source can drive a 4-20 mA loop for industrial transmitters. Compared with using a separate ADC + op-amp + MCU, the PIC14000 cuts board area by approximately 50% and improves temperature stability by eliminating inter-chip analog routing.
Recommended
Appliance Control Boards (White Goods)
The PIC14000T-04/SO is widely deployed in white-goods appliance controls - washing machines, dishwashers, and refrigerators - where its on-chip sigma-delta A/D reads sensor inputs (water level, temperature, motor current) while the programmable current source and voltage regulator control output drive valves, relays, and triacs. The OTP memory locks the firmware against field tampering, which is critical for safety-certified appliances. The 28-SOIC package with 7.50 mm body width is compatible with conformal-coated appliance PCBs and survives the high-humidity, high-temperature operating environment of laundry rooms. Existing field data shows the PIC14000T-04/SO in production for over a decade.
Recommended
Recommended Products Summary
Engineering reference data for PIC14000T-04/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC14000-04/SO | PIC14000-04I/SO | PIC14000T-04I/SO | PIC14000-04E/SO | PIC14000T-04E/SO |
|---|---|---|---|---|---|---|
| Package | 28-SOIC | 28-SOIC | 28-SOIC | 28-SOIC | 28-SOIC | 28-SOIC |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP |
| CPU Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Temperature Grade | Commercial | Commercial | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Extended | Extended |
| Packaging Form | Tape & Reel | Tube | Tube | Tape & Reel | Tube | Tape & Reel |
| On-chip A/D | Sigma-Delta slope | Sigma-Delta slope | Sigma-Delta slope | Sigma-Delta slope | Sigma-Delta slope | Sigma-Delta slope |
| 4-bit Current Source | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Tape & Reel packaging on commercial temperature grade (vs PIC14000-04/SO)
- Wide operating-temperature PIC14 family options (vs PIC14000T-04I/SO)
- Mature, multi-decade production history (vs PIC16F883)
Design Notes
Place a 0.1 uF ceramic decoupling capacitor as close as possible to the VDD pin (pin 7) and a bulk 10 uF tantalum or ceramic capacitor on the VDD rail. The PIC14000T-04/SO draws brief current spikes during OTP programming and during sigma-delta A/D conversions; insufficient decoupling causes the internal bandgap reference to droop, introducing gain error. Tie both VDD pins (7 and 20) together and both VSS pins (8 and 19) together with wide traces to minimize ground bounce.
Route the MCLR/VPP pin (pin 1) through a 10 kohm pull-up resistor to VDD to allow in-circuit serial programming. Keep the analog traces (RA0-RA4) short and away from digital switching lines such as RC0-RC7 to prevent crosstalk into the sigma-delta converter. If the on-chip temperature sensor is used, mount the PIC14000T-04/SO away from heat sources on the PCB and avoid running high-current traces beneath the package, because the integrated sensor measures the die temperature which is influenced by board-level thermal coupling.
OTP program memory cannot be erased: every PIC14000T-04/SO die is single-write. Fully validate firmware on a flash-equivalent PIC16F883 or windowed PIC14000 variant before committing to OTP production units. Do not exceed the VPP voltage or VDD rise-time limits specified in the Microchip PIC14000 datasheet (DS40192E) programming specifications, or the OTP cells will be permanently damaged. Source code development kits (such as the PIC14000 prototyping board) should be used to characterize the sigma-delta A/D reference and 4-bit current source behavior before locking the BOM.
Compliance Information
RoHS and REACH status not explicitly stated in the verified web data and require datasheet or manufacturer declaration review. Not AEC-Q100 qualified (industrial grade only). Lead-free per Microchip packaging standards.
