PIC16C923T-04/PT - 8-Bit 4MHz OTP MCU with LCD | Microchip
MPN: PIC16C923T-04/PT ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.42 | $8.42 |
| 10 | $7.59 | $75.90 |
| 100 | $6.74 | $674.00 |
| 500 | $5.96 | $2,980.00 |
| 1,000 | $5.31 | $5,310.00 |
PIC16C923T-04/PT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, and programmable peripherals onto one IC. Within the broader taxonomy, the PIC16C923 is a member of the 8-bit PIC16 OTP family, a sub-class of microcontrollers, which themselves belong to embedded processors and ultimately to digital ICs and semiconductors. OTP variants use one-time-programmable EPROM for code storage, providing non-volatile retention at lower cost than flash, but they cannot be re-programmed.
Key features of the PIC16C923T-04/PT include built-in I2C and SPI serial interfaces, an on-chip LCD driver with dedicated segment and common pins, a 10-bit PWM module, power-on reset (POR), brown-out reset (BOR), and a watchdog timer (WDT). The integrated LCD controller simplifies human-machine-interface designs by eliminating the need for an external display driver.
The PIC16C923 core uses a Harvard RISC architecture with separate program and data buses, allowing instruction fetch and operand access to occur in the same cycle. The 8-level hardware stack and 8 special-function registers provide deterministic interrupt response. An 8-bit timer/counter, capture/compare, and 10-bit PWM are integrated, alongside synchronous and asynchronous serial ports.
Typical applications include alphanumeric LCD display modules, industrial control panels, instrumentation with segmented displays, point-of-sale terminals, and consumer appliance interfaces. The wide temperature-grade range of the commercial -I variant and 64-pin TQFP footprint give designers flexibility for compact HMI boards.
When designing with the PIC16C923T-04/PT, choose a programmer that supports OTP EPROM (not flash) and ensure the LCD bias and segment pin allocations match your display glass. Because the device is OTP, firmware revision control is critical before programming.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC16C923T-04/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 PIC16C923T-04/PT (same form factor and footprint) — differing in Package, Core Architecture, LCD Driver, Mounting Type, Instruction Cycle.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C923-04/PT
✅ Drop-In✓ In Stock
$2.53 / Unit
View Datasheet →PIC16C923T-04I/PT
✅ Drop-In✓ In Stock
$8.05 / Unit
View Datasheet →PIC16C923-04I/PT
✅ Drop-In✓ In Stock
$8.2 / Unit
View Datasheet →PIC16F946-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F914-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C923T-04/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Series | PIC16C 8-bit OTP Microcontrollers |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 7 KB (4K x 14) |
| RAM | 176 B |
| CPU Speed | 4 MHz |
| Instruction Cycle | 500 ns |
| Instruction Set | 35 single-word instructions |
| LCD Driver | Integrated, on-chip |
| Serial Interfaces | I2C, SPI |
| PWM Channels | 1 x 10-bit |
| Watchdog Timer (WDT) | Yes |
| Brown-out Reset (BOR) | Yes |
| Power-On Reset (POR) | Yes |
| Package | 64-pin TQFP (10x10 mm), T/R suffix |
| Mounting Type | Surface Mount |
PIC16C923T-04/PT Pin Configuration
| Pin 1 | LCDSEG0 — LCD segment driver output |
| Pin 2 | LCDSEG1 — LCD segment driver output |
| Pin 3 | LCDSEG2 — LCD segment driver output |
| Pin 4 | LCDSEG3 — LCD segment driver output |
| Pin 5 | LCDSEG4 — LCD segment driver output |
| Pin 6 | LCDSEG5 — LCD segment driver output |
| Pin 7 | LCDSEG6 — LCD segment driver output |
| Pin 8 | LCDSEG7 — LCD segment driver output |
| Pin 9 | VSS — Ground |
| Pin 10 | VDD — Positive supply |
| Pin 11 | OSC1 — Crystal/oscillator input |
| Pin 12 | OSC2 — Crystal/oscillator output |
| Pin 13 | MCLR — Master clear / reset |
| Pin 14 | RB0 — PORTB digital I/O (interrupt-on-change) |
| Pin 15 | RB1 — PORTB digital I/O |
| Pin 16 | RB2 — PORTB digital I/O |
| Pin 17 | RB3 — PORTB digital I/O |
| Pin 18 | RB4 — PORTB digital I/O |
| Pin 19 | RB5 — PORTB digital I/O |
| Pin 20 | RB6 — PORTB digital I/O / PGC |
| Pin 21 | RB7 — PORTB digital I/O / PGD |
| Pin 22 | RC0 — PORTC digital I/O |
| Pin 23 | RC1 — PORTC digital I/O |
| Pin 24 | RC2 — PORTC digital I/O |
| Pin 25 | RC3 — PORTC digital I/O |
| Pin 26 | RC4 — PORTC digital I/O |
| Pin 27 | RC5 — PORTC digital I/O |
| Pin 28 | RC6 — PORTC digital I/O / TX |
| Pin 29 | RC7 — PORTC digital I/O / RX |
| Pin 30 | RD0 — PORTD digital I/O |
| Pin 31 | RD1 — PORTD digital I/O |
| Pin 32 | RD2 — PORTD digital I/O |
| Pin 33 | RD3 — PORTD digital I/O |
| Pin 34 | RD4 — PORTD digital I/O |
| Pin 35 | RD5 — PORTD digital I/O |
| Pin 36 | RD6 — PORTD digital I/O |
| Pin 37 | RD7 — PORTD digital I/O |
| Pin 38 | RE0 — PORTE digital I/O / LCD BIAS |
| Pin 39 | RE1 — PORTE digital I/O / LCD BIAS |
| Pin 40 | RE2 — PORTE digital I/O / LCD BIAS |
| Pin 41 | LCDCOM0 — LCD common line output |
| Pin 42 | LCDCOM1 — LCD common line output |
| Pin 43 | LCDCOM2 — LCD common line output |
| Pin 44 | LCDCOM3 — LCD common line output |
| Pin 45 | VLCD1 — LCD voltage reference |
| Pin 46 | VLCD2 — LCD voltage reference |
| Pin 47 | VLCD3 — LCD voltage reference |
| Pin 48 | RCV — I/O / voltage reference |
| Pin 49 | NC — Not connected (per datasheet) |
| Pin 50 | NC — Not connected (per datasheet) |
| Pin 51 | NC — Not connected (per datasheet) |
| Pin 52 | NC — Not connected (per datasheet) |
| Pin 53 | NC — Not connected (per datasheet) |
| Pin 54 | LCDSEG8 — LCD segment driver output |
| Pin 55 | LCDSEG9 — LCD segment driver output |
| Pin 56 | LCDSEG10 — LCD segment driver output |
| Pin 57 | LCDSEG11 — LCD segment driver output |
| Pin 58 | LCDSEG12 — LCD segment driver output |
| Pin 59 | LCDSEG13 — LCD segment driver output |
| Pin 60 | LCDSEG14 — LCD segment driver output |
| Pin 61 | LCDSEG15 — LCD segment driver output |
| Pin 62 | LCDSEG16 — LCD segment driver output |
| Pin 63 | LCDSEG17 — LCD segment driver output |
| Pin 64 | LCDSEG18 — LCD segment driver output |
Typical Applications
PIC16C923T-04/PT is suitable for 6 applications: Alphanumeric LCD Display Panels, Industrial Control Panels, Point-of-Sale Terminals, Medical Instrumentation Displays, Consumer Appliance Interfaces, Metering and Measurement.
Alphanumeric LCD Display Panels
The PIC16C923T-04/PT's integrated LCD driver directly multiplexes segment and common lines of 4x40 alphanumeric displays, eliminating an external LCD controller and reducing BOM by ~USD 0.80-1.50 per board. At 4 MHz / 500 ns instruction cycle, it refreshes the LCD charge-pump and segment registers without taxing its 8-level hardware stack, while 176 B SRAM holds LCD frame buffers for variable text.
Recommended
Industrial Control Panels
For factory-floor HMI panels the PIC16C923T-04/PT drives multiplexed segment LCDs for status readouts, monitors digital inputs via its GPIO, and communicates with a master PLC over I2C or SPI - all from a single 64-pin TQFP device. The on-chip POR, BOR, and WDT give resilience against brown-outs and ESD on industrial wiring harnesses, while the industrial -I variant operates from -40C to +85C.
Recommended
Point-of-Sale Terminals
In low-cost POS terminals the PIC16C923T-04/PT drives the operator 2x16 or 4x20 LCD, reads keypad matrix via GPIO, and exchanges transaction data over SPI to a host mainboard. The 35-instruction PIC16 RISC core yields predictable 500 ns response on every keypad scan loop, and OTP EPROM prevents firmware tampering by unauthorized service centers per the Microchip PIC16C923 datasheet.
Recommended
Medical Instrumentation Displays
The PIC16C923T-04/PT powers handheld glucometer or blood-pressure monitor LCD readouts, sampling analog sensors, computing results, and refreshing segmented displays from its integrated LCD driver. The PIC16 RISC core is deterministic for sensor read timing, while the 10-bit PWM drives a buzzer or backlight. Industrial -I temperature grade supports equipment used in clinical environments.
Recommended
Consumer Appliance Interfaces
Washing machines, microwave ovens, and induction cooktops use the PIC16C923T-04/PT to drive multi-segment LCD status displays, monitor keypads, and switch high-voltage loads via the 10-bit PWM. OTP EPROM secures calibration and timing constants against field reverse-engineering, and the 64-TQFP footprint supports compact appliance PCB layouts.
Recommended
Metering and Measurement
Digital panel meters, temperature controllers, and weighing scales use the PIC16C923T-04/PT to display measurements on segmented LCD while the on-chip PWM drives control loops or relay set-points. The 176 B SRAM is sufficient for moving-average filters on ADC data, and the I2C bus links to external EEPROM for logging set-point profiles per the Microchip datasheet reference designs.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C923T-04/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C923-04/PT | PIC16C923T-04I/PT | PIC16F946-I/PT | PIC16F914-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) |
| Program Memory Type | OTP EPROM, 7 KB | OTP EPROM, 7 KB | OTP EPROM, 7 KB | Flash, 14 KB | Flash, 8 KB |
| CPU Speed | 4 MHz (500 ns cycle) | 4 MHz | 4 MHz | 20 MHz | 20 MHz |
| RAM | 176 B | 176 B | 176 B | 336 B | 256 B |
| LCD Driver | Integrated, 4x40 max | Integrated, 4x40 max | Integrated, 4x40 max | Integrated, larger | Integrated, smaller |
| Temperature Grade | Commercial (0C to +70C) | Commercial | Industrial (-40C to +85C) | Industrial | Industrial |
| Lifecycle Status | NRND | NRND | NRND | Active | Active |
Key Differentiators
- Integrated LCD driver reduces BOM and PCB area (vs External LCD controller (e.g., HD44780-based))
- OTP EPROM secures firmware against field tampering (vs PIC16F946-I/PT (flash-based))
- Deterministic 35-instruction RISC core (vs ARM Cortex-M0+ MCUs)
Design Notes
Place decoupling capacitors (100 nF ceramic plus 10 uF tantalum) within 5 mm of VDD pin 10, with VSS pin 9 routed as a wide ground plane trace. The TQFP-64 package has a center thermal pad (some PIC16C923 revisions) - if present, solder it to a copper pour with multiple vias to VSS for thermal relief and EMI reduction.
The PIC16C923T-04/PT contains OTP EPROM, not flash - firmware cannot be erased or rewritten once programmed. Plan firmware revision control carefully: verify HEX on a windowed PIC16C923JW part before committing production code to OTP devices. Distinguishing features from flash PIC16F variants are missing ICSP erase capability and absence of EEPROM.
Brown-out reset (BOR) trip voltage should be configured to match the regulated supply to avoid spurious resets. Per the PIC16C923 datasheet, the on-chip voltage regulator requires the MCLR pin pulled high via 10 kohm to VDD, and the OSC1/OSC2 crystal load capacitors should match the crystal's rated load (typically 15-22 pF for 4 MHz).
Compliance Information
RoHS, REACH, and lead-free status not explicitly stated in verified data; the PIC16C923 family was released prior to mandatory RoHS adoption, so PT (TQFP) variants may require tin-lead or be marked non-compliant - confirm via Microchip compliance certificates before using in RoHS-only production.
