PIC16LC923-04I/L - 8-Bit MCU, 4MHz, 7KB OTP, 52 I/O | Microchip
Référence : PIC16LC923-04I/L ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $9.45 | $9,45 |
| 10 | $8.62 | $86,20 |
| 100 | $7.81 | $781,00 |
| 500 | $7.05 | $3 525,00 |
| 1 000 | $6.42 | $6 420,00 |
PIC16LC923-04I/L Présentation
What is a PIC16C microcontroller? The PIC16C family is Microchip's classic 8-bit OTP-programmable MCU line based on a RISC Harvard architecture. PIC microcontrollers integrate CPU core, non-volatile program memory, RAM, peripherals (timers, ADC, USART, I/O), and in many variants a LCD driver on a single die. They occupy the low-power, deterministic-execution tier of the embedded MCU hierarchy: microcontroller -> 8-bit MCU -> PIC family -> PIC16C sub-family. Compared with flash-based PIC16F parts, PIC16C OTP devices ship with one-time-programmable EPROM and target cost-sensitive volume production.
Key features of the PIC16LC923 include 35 single-word instructions with 500 ns single-cycle execution (except program branches which are two cycles), 8-level hardware stack, four 8-bit I/O ports (PORTA-PORTD partially), and a wide 2.5 V to 6.0 V supply range thanks to its LC (low-voltage, low-power CMOS) process. The device integrates peripherals such as timers, a USART, and capture/compare/PWM modules, supporting both 3.3 V and 5 V system designs.
The PIC16LC923 uses a 14-bit instruction word and a separate 8-bit data path, with all single-cycle instructions completing in 500 ns at 4 MHz, providing deterministic timing for interrupt-driven control loops. The LC process variant reduces power consumption and allows operation down to 2.5 V, while the -04 speed suffix denotes a 4 MHz maximum clock. Internal RC oscillator and crystal modes are supported, giving flexibility in BOM cost versus timing accuracy.
Typical applications include LCD-display-based industrial keypads and front-panel controllers, white-goods and consumer appliances, instrument front panels with LED/LCD indicator logic, and legacy embedded control boards being maintained for long-life programs. The 52 I/O count supports keypad scanning, multiplexed LCD drive, and parallel bus peripherals in a single chip.
When designing with this part, note that OTP memory requires windowed parts for verification; engineering units should be ordered in ceramic-windowed packages or pre-programmed before assembly. The 68-pin PLCC footprint allows socketed programming and field replacement, but PLCC tooling and sockets are increasingly scarce - plan second-source or migration paths early in the design cycle.
This page synthesizes distributor pricing across Mouser, DigiKey and LCSC, drop-in alternatives within the PIC16LC923 product family, and practical design notes not found in the manufacturer datasheet alone.
Alternatives de remplacement direct pour PIC16LC923-04I/L — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC16LC923T-04I/L
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC16LC923-04/L
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC16C923-04/L
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
PIC16LC923-04I/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
PIC16LC923-04I/L Valeurs maximales et caractéristiques électriques
| Family | PIC16C |
| Core | 8-bit RISC |
| Program Memory Type | OTP (EPROM) |
| Program Memory Size | 7 KB (4K x 14) |
| RAM Size | 176 bytes |
| Fréquence d'horloge maximale | 4 MHz |
| Instruction Cycle Time | 500 ns |
| Number of I/O Pins | 52 |
| Supply Voltage Range | 2.5 V to 6.0 V |
| Plage de température de fonctionnement | -40C to +85C (industrial, 'I') |
| Boîtier | 68-pin PLCC (24.23 x 24.23 mm) |
| Type de montage | Surface Mount |
| Largeur du bus de données | 8-bit |
| Instruction Word Width | 14-bit |
Configuration des broches de PIC16LC923-04I/L
| Broche 1 | MCLR — Master Clear (Reset) input, active low |
| Broche 2 | RA0 — PORTA bit 0 (digital I/O) |
| Broche 3 | RA1 — PORTA bit 1 (digital I/O) |
| Broche 4 | RA2 — PORTA bit 2 (digital I/O) |
| Broche 5 | RA3 — PORTA bit 3 (digital I/O) |
| Broche 6 | RA4 — PORTA bit 4 (digital I/O / T0CKI) |
| Broche 7 | RA5 — PORTA bit 5 (digital I/O / AN4) |
| Broche 8 | RE0 — PORTE bit 0 (digital I/O / RD) |
| Broche 9 | RE1 — PORTE bit 1 (digital I/O / WR) |
| Broche 10 | RE2 — PORTE bit 2 (digital I/O / CS) |
| Broche 11 | VDD — Positive supply voltage |
| Broche 12 | VSS — Ground reference |
| Broche 13 | OSC1 — Crystal oscillator input |
| Broche 14 | OSC2 — Crystal oscillator output |
| Broche 15 | RC0 — PORTC bit 0 (digital I/O) |
| Broche 16 | RC1 — PORTC bit 1 (digital I/O / T1CKI) |
| Broche 17 | RC2 — PORTC bit 2 (digital I/O / CCP1) |
| Broche 18 | RC3 — PORTC bit 3 (digital I/O) |
| Broche 19 | RD0 — PORTD bit 0 (digital I/O) |
| Broche 20 | RD1 — PORTD bit 1 (digital I/O) |
| Broche 21 | RD2 — PORTD bit 2 (digital I/O) |
| Broche 22 | RD3 — PORTD bit 3 (digital I/O) |
| Broche 23 | RC4 — PORTC bit 4 (digital I/O / SDI) |
| Broche 24 | RC5 — PORTC bit 5 (digital I/O / SDO) |
| Broche 25 | RC6 — PORTC bit 6 (digital I/O / TX) |
| Broche 26 | RC7 — PORTC bit 7 (digital I/O / RX) |
| Broche 27 | RD4 — PORTD bit 4 (digital I/O) |
| Broche 28 | RD5 — PORTD bit 5 (digital I/O) |
| Broche 29 | RD6 — PORTD bit 6 (digital I/O) |
| Broche 30 | RD7 — PORTD bit 7 (digital I/O) |
| Broche 31 | VSS — Ground reference |
| Broche 32 | VDD — Positive supply voltage |
| Broche 33 | RB0 — PORTB bit 0 (digital I/O / INT) |
| Broche 34 | RB1 — PORTB bit 1 (digital I/O) |
| Broche 35 | RB2 — PORTB bit 2 (digital I/O) |
| Broche 36 | RB3 — PORTB bit 3 (digital I/O) |
| Broche 37 | RB4 — PORTB bit 4 (digital I/O) |
| Broche 38 | RB5 — PORTB bit 5 (digital I/O) |
| Broche 39 | RB6 — PORTB bit 6 (digital I/O / PGC) |
| Broche 40 | RB7 — PORTB bit 7 (digital I/O / PGD) |
| Broche 41 | NC — Not connected (per datasheet) |
| Broche 42 | NC — Not connected (per datasheet) |
| Broche 43 | NC — Not connected (per datasheet) |
| Broche 44 | NC — Not connected (per datasheet) |
| Broche 45 | NC — Not connected (per datasheet) |
| Broche 46 | NC — Not connected (per datasheet) |
| Broche 47 | NC — Not connected (per datasheet) |
| Broche 48 | NC — Not connected (per datasheet) |
| Broche 49 | NC — Not connected (per datasheet) |
| Broche 50 | NC — Not connected (per datasheet) |
| Broche 51 | NC — Not connected (per datasheet) |
| Broche 52 | NC — Not connected (per datasheet) |
| Broche 53 | NC — Not connected (per datasheet) |
| Broche 54 | NC — Not connected (per datasheet) |
| Broche 55 | NC — Not connected (per datasheet) |
| Broche 56 | NC — Not connected (per datasheet) |
| Broche 57 | NC — Not connected (per datasheet) |
| Broche 58 | NC — Not connected (per datasheet) |
| Broche 59 | NC — Not connected (per datasheet) |
| Broche 60 | NC — Not connected (per datasheet) |
| Broche 61 | NC — Not connected (per datasheet) |
| Broche 62 | NC — Not connected (per datasheet) |
| Broche 63 | NC — Not connected (per datasheet) |
| Broche 64 | NC — Not connected (per datasheet) |
| Broche 65 | NC — Not connected (per datasheet) |
| Broche 66 | NC — Not connected (per datasheet) |
| Broche 67 | NC — Not connected (per datasheet) |
| Broche 68 | NC — Not connected (per datasheet) |
Applications typiques
PIC16LC923-04I/L convient pour 6 applications: Industrial Front-Panel Keypad Controller, LCD-Driven Appliance Control Board, Legacy Industrial Instrumentation, Parallel-Bus Peripheral Interface Board, Educational 8-bit Microcontroller Trainer, Automotive Aftermarket Accessory Controller.
Industrial Front-Panel Keypad Controller
The PIC16LC923-04I/L is well suited to industrial front-panel keypad and HMI controllers thanks to its 52 digital I/O pins and 7 KB OTP program memory. The 4 MHz clock and 500 ns instruction cycle provide deterministic scan timing for 8x8 matrix keypads without jitter. The wide 2.5-6.0 V supply tolerance supports both 3.3 V and 5 V backplane designs. The LC process variant keeps quiescent current low for always-on operator panels. Note that OTP memory requires windowed parts for code-validation builds - budget engineering units in ceramic packages separately.
Recommandé
LCD-Driven Appliance Control Board
With 52 I/O and adequate code space for character-mapped LCD driver routines, the PIC16LC923-04I/L fits white-goods and consumer appliance control boards where a character LCD is multiplexed with relays and sensors. The 4 MHz CPU cycle yields 500 ns deterministic instruction throughput for time-slice refresh loops. The 2.5-6.0 V supply range allows direct connection to rectified 5 V rails typical in appliance power supplies. The 68-PLCC package supports socketed field serviceability in long-lifecycle appliance SKUs.
Recommandé
Legacy Industrial Instrumentation
Long-life industrial instrumentation programs - process controllers, panel meters, and field transmitters - frequently depend on PIC16C-family parts for proven field reliability. The PIC16LC923-04I/L's -40C to +85C industrial temperature range and NRND-but-supported lifecycle status make it ideal for retrofit and maintenance SKUs where firmware is locked and PCB cannot be reworked. The 4 MHz instruction rate suffices for RTD/thermocouple linearization, scaling, and display-update loops. Sourcing teams should pair this part with a qualified flash-based drop-in to de-risk obsolescence.
Recommandé
Parallel-Bus Peripheral Interface Board
The PIC16LC923-04I/L can act as a low-cost parallel-bus bridge or protocol converter in legacy peripheral interface boards because of its 52 I/O and 7 KB OTP code space. Common roles include GPIB-to-UART converters, parallel-keypad to serial bridges, and printer-port emulators. The Harvard architecture with deterministic 500 ns cycles is well-suited to handshake-driven parallel transfers. The 2.5-6.0 V supply tolerance accepts both 3.3 V and 5 V peripheral sides of a level-shifting bridge.
Recommandé
Educational 8-bit Microcontroller Trainer
Universities and embedded-training labs adopt the PIC16LC923-04I/L because the 68-PLCC socketable package simplifies student hot-swap and re-programming using windowed engineering parts. The 35-instruction RISC core is the canonical teaching platform for assembly language and embedded fundamentals. With 52 I/O and 7 KB OTP, students can implement full mini-projects (traffic light, keypad lock, frequency counter) on one chip. The wide 2.5-6.0 V supply range also lets labs power boards from USB or bench supplies without regulation.
Recommandé
Automotive Aftermarket Accessory Controller
Although not AEC-Q100 qualified, the PIC16LC923-04I/L is sometimes deployed in non-critical automotive aftermarket accessories - alarm indicators, auxiliary lighting controllers, and OBD-II diagnostic tools - where its wide 2.5-6.0 V input tolerance handles 12 V vehicle rails after pre-regulation. The 4 MHz core and 52 I/O support multiple relay/sensor inputs in a single chip. Engineers should verify automotive-specific EMC and temperature margins independently, as the -40C to +85C rating meets most cabin applications but not under-hood environments.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC16LC923-04I/L — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC16LC923T-04I/L | PIC16LC923-04/L | PIC16C923-04/L |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 68-PLCC (24.23x24.23 mm) | 68-PLCC - same | 68-PLCC - same | 68-PLCC - same |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP |
| Maximum Clock | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Supply Voltage | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 4.0 V to 6.0 V (LC vs standard C process) |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C | 0C to +70C (commercial) | 0C to +70C (commercial, standard C) |
| I/O Pins | 52 | 52 | 52 | 52 |
| Lifecycle | NRND (as of 2026-09-22) | NRND | NRND | Mature / NRND |
Principaux différenciateurs
- Industrial temperature grade with same 7 KB OTP code space as commercial variant (vs PIC16LC923-04/L)
- LC low-voltage process extends supply range below standard C parts (vs PIC16C923-04/L)
- Standard 68-PLCC socketed package enables field serviceability (vs PIC16LC923-04I/PT (TQFP-64))
Notes de conception
The PIC16LC923-04I/L uses OTP (One-Time-Programmable) EPROM. Production parts cannot be re-programmed in the field. Always order engineering samples in windowed ceramic packages (UV-erasable) for code verification, and verify firmware on the windowed version before committing OTP units. Plan a 5-10% OTP programming yield allowance and budget windowed engineering units separately. Microchip's OTP programming specification requires VPP of 13 V typical during programming.
Place a 0.1 uF decoupling capacitor as close as possible to each VDD/VSS pair (the 68-PLCC has multiple VDD/VSS pins on pins 11, 12, 31, 32). Add a bulk 10 uF tantalum or ceramic at the board supply entry. The LC process variant draws lower quiescent current but still requires proper decoupling to handle the 4 MHz internal switching transients. Long VDD traces between decoupling caps and the device will cause logic-level noise on MCLR and reset lines.
The 68-PLCC package has a 1.27 mm pitch and a center thermal/epitaxy pad that should be soldered to a moderate copper pour for mechanical robustness. Keep crystal traces (OSC1/OSC2, pins 13/14) short and symmetric, with the load capacitors placed within 5 mm of the pins. Route MCLR (pin 1) separately from high-current switching traces to avoid false resets. Provide a 10 kohm pull-up on MCLR and a 100 nF cap to ground for reset noise immunity.
The PIC16LC923-04I/L is classified NRND (Not Recommended for New Designs) by Microchip as of 2026-09-22. For new designs, evaluate the flash-based PIC16F equivalent family first. For long production runs, secure a multi-year allocation agreement with Microchip or qualify a second source now. The PLCC tooling and sockets are increasingly scarce - design team should plan migration to TQFP package if PLCC supply tightens.
Informations de conformité
Compliance fields marked unknown because the Verified Web Data does not explicitly state RoHS, REACH, lead-free or halogen-free status. PIC16LC923 family is OTP legacy product; AEC-Q100 not applicable / not qualified. Engineers should request compliance documentation directly from Microchip for production qualification.
