PIC16C925T-I/PT - 8-Bit OTP MCU w/ LCD Driver, 64-TQFP | Microchip
MPN: PIC16C925T-I/PT ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.4 | $114.00 |
| 100 | $10.1 | $1,010.00 |
| 500 | $8.95 | $4,475.00 |
| 1,000 | $7.85 | $7,850.00 |
PIC16C925T-I/PT Overview
A PIC microcontroller is a Harvard-architecture 8-bit RISC processor with separate program and data buses, recognized for deterministic interrupt latency, ultra-low power consumption, and a compact 35-instruction instruction set. Within Microchip's taxonomy, the PIC16C925 belongs to the mid-range PIC16 family (microcontroller -> 8-bit MCU -> embedded controller -> semiconductor IC), and the OTP variants (PIC16C-series) target volume production where firmware is finalized and code-protection is mandatory. This contrasts with the Flash-based PIC16F and PIC16LF series used in development and field-upgradable designs.
Key features include an integrated 8-channel 8-bit A/D converter, a capture/compare/PWM module, a synchronous serial port (SSP) for SPI/I2C, a USART, two 8-bit timers and one 16-bit timer, a watchdog timer with its own on-chip RC oscillator, and a wide operating voltage range up to 5.5 V. Brown-out reset, power-on reset, and code protection are also integrated, reducing external component count and BOM cost for sealed-unit appliance designs.
The PIC16C925T-I/PT uses Microchip's classic CMOS/EPROM technology and a fully static design, allowing clock frequencies down to DC for low-power sleep modes. The OTP program memory is one-time programmable, after which the bit pattern cannot be altered, making this part suited for high-volume production runs of mature products rather than for prototyping.
Typical applications include white-goods control panels, thermostats, weighing scales, medical infusion pumps, industrial counters, gas-meter displays, and any battery- or line-powered appliance requiring an integrated segment-LCD glass drive alongside general-purpose digital I/O.
When designing with this device, plan OTP programming tooling and code-protection fuse settings early in the design cycle, because code cannot be modified post-programming. The integrated LCD charge-pump can be bypassed to reduce quiescent current on line-powered systems but must be retained for battery operation below the LCD threshold voltage.
This page synthesizes distributor pricing, verified cross-references, and practical design notes not found in the manufacturer datasheet alone, giving procurement and design engineers a single source for evaluation.
Drop-in alternatives for PIC16C925T-I/PT — 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 PIC16C925T-I/PT (same form factor and footprint) — differing in Communication Peripherals, Core Architecture, I/O Pins, Package.
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Request AlternativesPIC16C925T-I/PT Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit OTP Microcontroller |
| Core Architecture | PIC 16C (Mid-Range Harvard RISC) |
| Program Memory | 7 KB (4K x 14) OTP |
| RAM | 176 x 8 bytes |
| Maximum Clock Frequency | 20 MHz |
| Instruction Execution Time | 200 ns |
| Operating Voltage Range | 2.5 V to 5.5 V (per family datasheet) |
| I/O Pins | Up to 33 (per 64-pin TQFP pinout) |
| Integrated LCD Driver | 32 segments x 4 commons |
| A/D Converter | 8 channels, 8-bit resolution |
| Timers | 2 x 8-bit, 1 x 16-bit |
| Communication Peripherals | USART, SSP (SPI / I2C) |
| PWM / CCP Module | Capture / Compare / PWM |
| Watchdog Timer | Yes, with dedicated on-chip RC oscillator |
| Brown-Out Reset | Yes |
| Package | 64-pin TQFP (10x10 mm) |
| Operating Temperature Range | -40C to +85C (Industrial, 'I' suffix) |
| Mounting Type | Surface Mount |
| MSL Level | 3 (per JEDEC J-STD-020, typical for TQFP) |
PIC16C925T-I/PT 64-pin tqfp (10x10 mm) Pin Configuration Guide
Pin configuration for PIC16C925T-I/PT (64-pin tqfp (10x10 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for PIC16C925T-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC16C925T-I/PT is suitable for 7 applications: White-Goods Control Panel, Programmable Thermostat, Electronic Weighing Scale, Medical Infusion Pump Controller, Industrial Counter and Timer, Gas Meter and Utility Display, HVAC Zone Controller.
White-Goods Control Panel
The PIC16C925T-I/PT is a strong fit for white-goods control panels (washing machines, dishwashers, ovens) because it integrates an LCD segment driver capable of driving 32 segments x 4 commons directly, eliminating the need for an external display driver IC. The 8-bit A/D converter reads temperature sensors, water-level probes, and door switches, while the CCP module drives buzzer tones and triac-based load control. With 7 KB of OTP program memory and 176 bytes of RAM, firmware fits comfortably for menu navigation and timed-cycle control. The wide 2.5-5.5 V supply range allows direct operation from a rectified 5 V rail or from 3 V battery backup during power-line glitches, reducing BOM cost and PCB area versus two-chip display-plus-MCU solutions.
Recommended
Programmable Thermostat
Wall-mounted programmable thermostats use the PIC16C925T-I/PT to drive multi-digit 7-segment plus icon LCD displays that show setpoint, room temperature, fan mode, and schedule status. The integrated LCD driver and on-chip charge pump allow direct glass drive from a 3 V battery supply without external voltage boosters, extending battery life across heating seasons. The 8-channel A/D reads thermistor bridges for room temperature and humidity sensing, while the USART interfaces to a remote temperature sensor or Wi-Fi module. The 20 MHz instruction rate and 35-instruction PIC16 mid-range RISC core simplify deterministic scheduling of HVAC relays via the CCP module, meeting EN 60730 functional-safety expectations for household appliances.
Recommended
Electronic Weighing Scale
Retail and kitchen weighing scales benefit from the PIC16C925T-I/PT's on-chip 8-bit A/D converter that digitizes load-cell bridge signals directly, eliminating an external ADC. The integrated LCD segment driver displays weight, unit, tare, and battery status on a custom glass, while the 35-instruction RISC core executes calibration, averaging, and unit-conversion routines within the 200 ns instruction budget. OTP program memory secures the calibration algorithm and prevents field tampering - a regulatory advantage in commercial weighing instruments. Industrial -40C to +85C operation supports both kitchen and warehouse environments, and the wide 2.5-5.5 V supply range allows operation from 3 V battery packs or 5 V USB-powered designs.
Recommended
Medical Infusion Pump Controller
Single-channel medical infusion pumps use the PIC16C925T-I/PT to drive segment LCD readouts of infusion rate, volume-to-infuse, and alarm icons while executing closed-loop stepper-motor control via the CCP/PWM module. OTP memory secures the dosing algorithm to prevent firmware modification, supporting FDA 21 CFR Part 11 traceability expectations. The watchdog timer with dedicated on-chip RC oscillator provides an independent safety-clock failure mechanism required by IEC 60601-1-8 alarm specifications, while the brown-out reset prevents corruption of the infusion log during battery replacement. Wide operating voltage supports both AC-line and battery-backed operation in portable infusion devices.
Recommended
Industrial Counter and Timer
Industrial cycle counters, hour meters, and event-logging timers use the PIC16C925T-I/PT to maintain elapsed-time or pulse-count values in non-volatile storage while driving a 4-digit 7-segment plus icon LCD. The 16-bit timer/counter captures high-frequency pulse-train inputs from encoders or flow meters, and the USART reports results to a supervisory PLC. The industrial -40C to +85C temperature range is mandatory for factory-floor deployment where cabinet temperatures can swing widely, and OTP memory locks firmware to prevent accidental field reprogramming. Brown-out reset protects the count register against corruption during heavy-load transients in industrial power environments.
Recommended
Gas Meter and Utility Display
Smart gas, water, and electric meters use the PIC16C925T-I/PT to drive segmented LCD readouts of cumulative consumption, tariff block, and tamper-detection alerts while consuming minimal quiescent current from battery cells that must last 10+ years. The integrated LCD charge pump generates V_LCD bias from the 3 V battery without external boost capacitors, and the deep-sleep mode with watchdog wake-up keeps average current in the microamp range. OTP code protection locks the calibration constants for regulatory metrology compliance (e.g. OIML R76, MID), and the wide -40C to +85C range handles outdoor cabinet environments from arctic cold to desert heat.
Recommended
HVAC Zone Controller
Multi-zone HVAC controllers use the PIC16C925T-I/PT to drive a graphical segment LCD showing zone temperatures, fan status, and setpoint for each zone, while the USART or SSP links to a central coordination controller over RS-485 or SPI. The CCP/PWM module drives proportional damper actuators and triac-controlled fan relays with hardware-timing precision. Industrial -40C to +85C operation is essential for plenum-mounted equipment that experiences attic-temperature extremes, and OTP memory secures OEM calibration values that define zone-balance behavior. Brown-out reset prevents mis-firing of damper relays during brown-out events on shared HVAC circuits.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C925T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C924T-04I/PT | PIC16C926T-I/PT | PIC16C924-08I/PT | PIC16C925-I/PT | PIC16C925T-04I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin TQFP (PT) 10x10 mm | 64-pin TQFP (PT) 10x10 mm - same | 64-pin TQFP (PT) 10x10 mm - same | 64-pin TQFP (PT) 10x10 mm - same | 64-pin TQFP (PT) 10x10 mm - same | 64-pin TQFP (PT) 10x10 mm - same |
| Program Memory | 7 KB (4K x 14) OTP | 4 KB (2K x 14) OTP | 14 KB (8K x 14) OTP | 4 KB (2K x 14) OTP | 7 KB (4K x 14) OTP - same | 7 KB (4K x 14) OTP - same |
| RAM | 176 bytes | 176 bytes - same | 336 bytes | 176 bytes - same | 176 bytes - same | 176 bytes - same |
| Maximum Clock Frequency | 20 MHz | 4 MHz | 20 MHz - same | 8 MHz | 20 MHz - same | 4 MHz |
| Operating Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V - same | 2.5 V to 5.5 V - same | 2.5 V to 5.5 V - same | 2.5 V to 5.5 V - same | 2.5 V to 5.5 V - same |
| Operating Temperature Range | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Pinout Compatibility | 64-pin TQFP reference | Pin-to-pin compatible | Pin-to-pin compatible | Pin-to-pin compatible | Pin-to-pin compatible (tray vs T&R) | Pin-to-pin compatible (lower speed grade) |
Key Differentiators
- Pin-to-pin compatible family siblings reduce inventory risk (vs PIC16C924T-04I/PT)
- Lowest-power 4 MHz grade for EMI-sensitive designs (vs PIC16C925T-04I/PT)
- Higher-memory sibling with same footprint for feature creep (vs PIC16C926T-I/PT)
Design Notes
OTP parts cannot be reprogrammed. Lock down the firmware revision and configuration bits BEFORE committing to production tooling. Any code bug discovered after programming requires a new silicon run, not a re-flash. Always program multiple prototype units in windowed or Flash-equivalent parts (PIC16F/LF family) for firmware validation, then port the final hex to the PIC16C925 OTP for production.
The integrated LCD driver charges segment and common planes using a charge pump; therefore, place the VLCD bypass capacitor (typically 0.1 uF) as close as possible to the VLCD pin. Keep the LCD glass flex connector traces short and shielded by a ground pour to prevent crosstalk onto adjacent analog inputs, which the on-chip A/D converter would otherwise pick up as noise on temperature or sensor readings.
Estimated: with VIN=5.0 V, VDD current at 20 MHz active mode is roughly 16 mA, giving 80 mW dissipation. Sleep current with watchdog enabled is approximately 15 uA. For battery-backed applications, gate the VDD supply with a low-Iq LDO such as the MCP1700 to keep quiescent below 1.6 uA; this achieves multi-year battery life in gas-meter deployments. Add a bulk 10 uF + 0.1 uF ceramic pair at the VDD pin to suppress voltage spikes during charge-pump switching.
The 64-pin TQFP package has a typical theta_JA of approximately 50 C/W on a 4-layer JEDEC test board. Estimated: at the maximum 80 mW active dissipation, junction temperature rise is only 4C above ambient, so no heatsink is needed. However, ensure the surrounding power components (triacs, relays) do not dump heat onto the MCU footprint, and provide adequate copper pour on VDD/GND planes to spread any transient dissipation from CCP/PWM-driven loads.
Compliance Information
RoHS and lead-free status were not available in the verified web data; [DATA_NEEDED] marker applied in specs. The PIC16C925T-I/PT is NOT AEC-Q100 qualified - this is a commercial/industrial-grade OTP MCU. Consult Microchip's product compliance documentation for definitive RoHS/REACH statements.