PIC14000-04/SO - 8-Bit Mixed Signal MCU, 7KB OTP, 28-SOIC
MPN: PIC14000-04/SO β End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $11.56 | $11.56 |
| 10 | $10.4 | $104.00 |
| 100 | $9.24 | $924.00 |
| 500 | $8.32 | $4,160.00 |
| 1,000 | $7.5 | $7,500.00 |
PIC14000-04/SO Overview
Background: An 8-bit mixed-signal microcontroller is a single-chip computer that combines a CPU, non-volatile program memory (here, One-Time Programmable EPROM), RAM, digital I/O, and on-chip analog peripherals such as ADCs, DACs, references, and current sources. The PIC14 family sits between PIC10/12 (smallest 8-bit MCUs) and PIC16/18 (general-purpose 8-bit) in Microchip's taxonomy, optimized specifically for closed-loop analog control and signal-acquisition applications rather than general-purpose logic.
Differentiating features include a 16-bit sigma-delta slope A/D converter, an on-chip bandgap voltage reference, an internal RC oscillator, a temperature sensor, a 4-bit programmable current source, a Low-Voltage Detector (LVD), a programmable voltage-reference generator, and a voltage-regulator control output. These blocks let a single PIC14000 replace a typical MCU plus several external analog ICs in a closed-loop sensor design.
The architecture uses a Harvard-style RISC core with separate program and data buses, allowing instruction fetch and operand access in one cycle. The mixed-signal analog engine is partitioned around a precision bandgap, and the device supports both 3.3 V and 5 V operation, making it flexible across battery-powered and industrial-rail designs.
Typical applications include SMPS secondary-side control, battery chargers, sensor conditioning, programmable current loops, and closed-loop fan/thermo control. The wide operating range and integrated analog blocks reduce external component count on tightly-constrained PCBs.
Design consideration: PIC14000 is marked Not Recommended for new designs by Microchip; for new designs the datasheet itself points to the PIC16F883 as the modern replacement with enhanced peripherals, more memory, and active lifecycle status.
This page consolidates distributor inventory, parametric position, and pin-compatible same-family alternatives for engineers maintaining legacy PIC14000-based designs.
Drop-in alternatives for PIC14000-04/SO β 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 PIC14000-04/SO (same form factor and footprint) β differing in Package, Core Architecture, Mounting Type, Program Memory Type, Instruction Execution Time.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC14000-04I/SO
β Drop-Inβ In Stock
$8.3 / Unit
View Datasheet βPIC14000-04E/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC14000T-04/SO
β Drop-Inβ In Stock
$7.05 / Unit
View Datasheet βPIC14000T-04I/SO
β Drop-Inβ In Stock
$7.55 / Unit
View Datasheet βPIC14000T-04E/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC14000-04/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC |
| Core Size | 8-bit |
| Instruction Set Width | 14-bit |
| Max CPU Frequency | 4 MHz |
| Instruction Cycle Time | 200 ns |
| Program Memory Type | OTP (One-Time Programmable EPROM) |
| Program Memory Size | 7 KB (4K x 14) |
| RAM Size | 192 bytes |
| Number of I/O Pins | 20 |
| A/D Converter | 16-bit sigma-delta slope converter |
| Analog Features | Bandgap reference, temperature sensor, 4-bit programmable current source, LVD, voltage-regulator control output, programmable reference generator |
| Oscillator Type | Internal RC |
| Supply Voltage | 3.3 V / 5 V |
| Package | 28-SOIC (0.295 inch / 7.50 mm width) |
| Mounting Type | Surface Mount |
| Number of Pins | 28 |
PIC14000-04/SO Pin Configuration
| Pin 1 | [DATA_NEEDED: pin 1 function] β Per PIC14000 datasheet (40122b) - pin assignment varies by product identification system option |
| Pin 2 | [DATA_NEEDED: pin 2 function] β Per PIC14000 datasheet (40122b) |
| Pin 3 | [DATA_NEEDED: pin 3 function] β Per PIC14000 datasheet (40122b) |
| Pin 4 | [DATA_NEEDED: pin 4 function] β Per PIC14000 datasheet (40122b) |
| Pin 5 | [DATA_NEEDED: pin 5 function] β Per PIC14000 datasheet (40122b) |
| Pin 6 | [DATA_NEEDED: pin 6 function] β Per PIC14000 datasheet (40122b) |
| Pin 7 | [DATA_NEEDED: pin 7 function] β Per PIC14000 datasheet (40122b) |
| Pin 8 | [DATA_NEEDED: pin 8 function] β Per PIC14000 datasheet (40122b) |
| Pin 9 | [DATA_NEEDED: pin 9 function] β Per PIC14000 datasheet (40122b) |
| Pin 10 | [DATA_NEEDED: pin 10 function] β Per PIC14000 datasheet (40122b) |
| Pin 11 | [DATA_NEEDED: pin 11 function] β Per PIC14000 datasheet (40122b) |
| Pin 12 | [DATA_NEEDED: pin 12 function] β Per PIC14000 datasheet (40122b) |
| Pin 13 | [DATA_NEEDED: pin 13 function] β Per PIC14000 datasheet (40122b) |
| Pin 14 | [DATA_NEEDED: pin 14 function] β Per PIC14000 datasheet (40122b) |
| Pin 15 | [DATA_NEEDED: pin 15 function] β Per PIC14000 datasheet (40122b) |
| Pin 16 | [DATA_NEEDED: pin 16 function] β Per PIC14000 datasheet (40122b) |
| Pin 17 | [DATA_NEEDED: pin 17 function] β Per PIC14000 datasheet (40122b) |
| Pin 18 | [DATA_NEEDED: pin 18 function] β Per PIC14000 datasheet (40122b) |
| Pin 19 | [DATA_NEEDED: pin 19 function] β Per PIC14000 datasheet (40122b) |
| Pin 20 | [DATA_NEEDED: pin 20 function] β Per PIC14000 datasheet (40122b) |
| Pin 21 | [DATA_NEEDED: pin 21 function] β Per PIC14000 datasheet (40122b) |
| Pin 22 | [DATA_NEEDED: pin 22 function] β Per PIC14000 datasheet (40122b) |
| Pin 23 | [DATA_NEEDED: pin 23 function] β Per PIC14000 datasheet (40122b) |
| Pin 24 | [DATA_NEEDED: pin 24 function] β Per PIC14000 datasheet (40122b) |
| Pin 25 | [DATA_NEEDED: pin 25 function] β Per PIC14000 datasheet (40122b) |
| Pin 26 | [DATA_NEEDED: pin 26 function] β Per PIC14000 datasheet (40122b) |
| Pin 27 | [DATA_NEEDED: pin 27 function] β Per PIC14000 datasheet (40122b) |
| Pin 28 | [DATA_NEEDED: pin 28 function] β Per PIC14000 datasheet (40122b) |
Typical Applications
PIC14000-04/SO is suitable for 6 applications: SMPS Secondary-Side Control, Battery Charger Control, Sensor Signal Conditioning, Programmable Current Loop / 4-20 mA Transmitter, Closed-Loop Fan / Thermo Control, Precision Voltage / Current Reference Module.
SMPS Secondary-Side Control
The PIC14000-04/SO is well-suited to SMPS secondary-side control because its integrated voltage-regulator control output, programmable reference generator, and 16-bit sigma-delta A/D allow direct feedback-loop implementation without external analog ICs. The 4 MHz RISC core provides deterministic 200 ns instruction timing that simplifies synchronous rectification and timing-critical control loops. The 4-bit programmable current source supports secondary-side current sensing, while the LVD enables input undervoltage protection. Operating from 3.3 V or 5 V, the device fits both battery-fed and industrial-rail isolated DC-DC converters, reducing BOM cost.
Recommended
Battery Charger Control
PIC14000-04/SO integrates the analog blocks needed for closed-loop charger control: the sigma-delta A/D for V/I sensing, the programmable current source for constant-current regulation, the bandgap reference for accuracy, and the temperature sensor for battery pack thermal protection. The 7 KB OTP holds charge profile state machines for Li-ion, NiMH, or lead-acid chemistries, while 192 bytes of RAM accommodates sense-and-control variables. The 20 I/O pins drive status LEDs, FET gate drivers, and communication to a host MCU. Wide 3.3 V / 5 V supply tolerance allows direct connection to single-cell or multi-cell battery stacks.
Recommended
Sensor Signal Conditioning
The PIC14000-04/SO's mixed-signal engine replaces a typical MCU + external op-amp + ADC + reference stack for sensor conditioning. The on-chip bandgap provides a stable voltage reference, the 16-bit sigma-delta A/D delivers high-resolution conversion of bridge, thermocouple, or RTD signals, and the 4-bit programmable current source can excite resistive sensors directly. The internal temperature sensor enables cold-junction compensation or system health monitoring without extra components. With 20 I/O, the device can multiplex multiple sensor channels, drive isolation barriers, and report over UART or I2C to a host controller.
Recommended
Programmable Current Loop / 4-20 mA Transmitter
PIC14000-04/SO is a strong fit for 4-20 mA current-loop transmitters in industrial process control. The sigma-delta A/D digitizes sensor inputs with high resolution, while the 4-bit programmable current source is the building block for the loop output driver (typically combined with an external pass transistor). The internal bandgap and LVD ensure accurate regulation and undervoltage lockout across the loop supply. The 4 MHz core handles linearization curves (RTD, thermocouple) in software without taxing the 192-byte RAM budget. Industrial temperature variants are available as drop-in upgrades.
Recommended
Closed-Loop Fan / Thermo Control
PIC14000-04/SO implements a complete closed-loop fan or thermo controller by combining its on-chip temperature sensor for feedback, the sigma-delta A/D for setpoint reference, and the programmable current source or PWM output for fan drive (with external FET). The voltage-regulator control output simplifies supply rail generation inside the controller module. With 20 I/O, the device reads tachometer pulses, drives status LEDs, and accepts keypad or I2C setpoint inputs. Operating from 3.3 V or 5 V allows direct use in 5 V standby rails common in server and networking equipment.
Recommended
Precision Voltage / Current Reference Module
The PIC14000-04/SO can be configured as a programmable precision reference module by leveraging its bandgap, programmable reference generator, and 4-bit current source. A host processor commands the desired output via I2C or UART, and the PIC14000-04/SO drives an external DAC or trimming network. The LVD protects against misconfiguration, and the internal temperature sensor enables software compensation. With 7 KB OTP storing calibration tables and 192 bytes of RAM for runtime variables, this is a compact, low-power alternative to dedicated reference ICs in instrumentation designs.
Recommended
Recommended Products Summary
Engineering reference data for PIC14000-04/SO β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC14000-04I/SO | PIC14000-04E/SO | PIC14000T-04/SO | PIC14000T-04I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (0.295 inch / 7.50 mm) | 28-SOIC (0.295 inch / 7.50 mm) - same | 28-SOIC (0.295 inch / 7.50 mm) - same | 28-SOIC (0.295 inch / 7.50 mm) - same | 28-SOIC (0.295 inch / 7.50 mm) - same |
| Core / Architecture | 8-bit PIC14 RISC | 8-bit PIC14 RISC - same | 8-bit PIC14 RISC - same | 8-bit PIC14 RISC - same | 8-bit PIC14 RISC - same |
| Max CPU Frequency | 4 MHz | 4 MHz - same | 4 MHz - same | 4 MHz - same | 4 MHz - same |
| Program Memory Type | OTP (7 KB / 4K x 14) | OTP (7 KB / 4K x 14) - same | OTP (7 KB / 4K x 14) - same | OTP (7 KB / 4K x 14) - same | OTP (7 KB / 4K x 14) - same |
| RAM Size | 192 bytes | 192 bytes - same | 192 bytes - same | 192 bytes - same | 192 bytes - same |
| Number of I/O | 20 | 20 - same | 20 - same | 20 - same | 20 - same |
| Temperature Grade | Commercial (0C to +70C) | Industrial (-40C to +85C) | Automotive/Extended (-40C to +125C) | Commercial (0C to +70C), Tape & Reel | Industrial (-40C to +85C), Tape & Reel |
| Packaging Format | Tube | Tube | Tube | Tape & Reel | Tape & Reel |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND |
Key Differentiators
- Integrated mixed-signal analog engine (vs PIC14000-04I/SO)
- Wide 3.3 V / 5 V supply range (vs PIC14000T-04E/SO)
- Compact 35-instruction RISC core (vs PIC16F883)
Design Notes
PIC14000-04/SO is marked Not Recommended for new designs by Microchip. For new product development, the PIC14000 datasheet itself recommends migrating to PIC16F883, which is in active production and offers Flash memory, more RAM, and enhanced peripherals. Use PIC14000-04/SO only for maintenance of existing legacy designs where PCB and firmware reuse is mandatory.
The PIC14000-04/SO commercial temperature grade supports 0C to +70C; for designs that must operate over -40C to +85C or -40C to +125C, select the drop-in industrial (PIC14000-04I/SO) or extended/automotive (PIC14000-04E/SO) variant. Confirm the exact temperature range in the PIC14000 datasheet (40122b) because specific sub-options (04, 04I, 04E) carry different grades per the PIC14000 product identification system.
PIC14000-04/SO integrates sensitive analog blocks (sigma-delta A/D, bandgap, current source) on the same die as the digital core. Follow the PIC14000 datasheet (40122b) layout guidance: keep the analog supply pins well bypassed with both bulk and 100 nF ceramic capacitors placed close to the pins, separate analog and digital grounds with a single-point connection, and route analog traces away from high-frequency digital lines to avoid coupling noise into the 16-bit A/D conversions.
Compliance Information
RoHS, lead-free, and halogen-free status were not provided in the verified web data and have been marked unknown per data authenticity rules. PIC14000-04/SO is commercial grade, not AEC-Q100; the /E automotive variant may be AEC-Q100 qualified, but this was not confirmed in the provided data. Engineers should request the latest material declaration from Microchip before placing production orders.
