PIC16C923-04I/L - 8-bit OTP MCU, 7KB EPROM, LCD Driver | Microchip
Référence : PIC16C923-04I/L ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $6.95 | $6,95 |
| 10 | $6.2 | $62,00 |
| 100 | $5.4 | $540,00 |
| 500 | $4.75 | $2 375,00 |
| 1 000 | $4.1 | $4 100,00 |
PIC16C923-04I/L Présentation
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, I/O peripherals, and timers on one die, executing one byte (8 bits) of data per instruction. The PIC16C923-04I/L belongs to the hypernym hierarchy: microcontroller -> embedded controller -> RISC microcontroller -> OTP (One-Time Programmable) microcontroller -> CMOS 8-bit MCU. This taxonomy reflects the part's position in the broader semiconductor and embedded-system product tree.
Key features include an integrated LCD driver capable of driving 32 segments and 4 commons, a synchronous serial port configurable as either 3-wire SPI or 2-wire I2C, a 14-bit instruction word with 8-level hardware stack, and an operating voltage range of 2.5 V to 6.0 V. The 68-pin PLCC package (case style L, industrial temperature grade -40C to +85C) supports designs that require a socketed, easily-programmable LCD-capable controller.
The PIC16C923-04I/L is built on Microchip's enhanced PIC 16C core architecture, featuring Harvard-style separate program and data buses for deterministic single-cycle execution. The integrated LCD module supports static, 1/2, 1/3, and 1/4 duty cycles with multiple bias modes, eliminating the need for an external LCD driver and reducing BOM cost in glass-display products.
Typical applications include consumer electronics with LCD displays (microwave ovens, washing machines, thermostats), industrial control panels, instrumentation with segment displays, and any cost-sensitive human-machine interface that benefits from on-chip LCD bias generation. The OTP program memory is ideal for mature, low-cost, high-volume production runs where field firmware updates are not required.
When designing with this device, note that OTP memory cannot be electrically erased - prototype code on a windowed (JW) variant for development, then move to the L (PLCC) package for production. The 500 ns instruction cycle supports instruction execution at up to 4 MHz; for higher speed requirements consider PIC16C925 (8 MHz) or PIC16C924 family members with more RAM.
Alternatives de remplacement direct pour PIC16C923-04I/L — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PIC16C923-04I/L (même facteur de forme et même empreinte) — différant par LCD Driver, Program Memory Type, Core Architecture, Operating Temperature, Package.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC16C925-I/L
✅ Remplacement direct✓ En stock
$4.85 / unité
Voir la fiche technique →PIC16C923-04/L
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC16C923T-04I/L
✅ Remplacement direct✓ En stock
$5.31 / unité
Voir la fiche technique →PIC16C924-04I/L
✅ Remplacement direct✓ En stock
$2.85 / unité
Voir la fiche technique →PIC16C923/JW
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC16F946-I/L
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC16C923-04I/L Valeurs maximales et caractéristiques électriques
| Program Memory Size | 7 KB (4K x 14) EPROM (OTP) |
| RAM Size | 176 bytes |
| Number of I/O Pins | 52 |
| CPU Architecture | 8-bit RISC PIC16C |
| Instruction Set Size | 35 single-word instructions |
| Instruction Cycle Time | 500 ns at 4 MHz |
| Fréquence d'horloge maximale | 4 MHz |
| Boîtier / Format | 68-pin PLCC (J-Lead, 'L' suffix) |
| Operating Voltage | 2.5 V to 6.0 V |
| Température de fonctionnement | -40C to +85C (Industrial) |
| LCD Driver | Integrated, up to 32 segments x 4 commons |
| Serial Interface | Synchronous SSP (SPI / I2C configurable) |
| Timers | 3 (TMR0, TMR1, TMR2) |
| Program Memory Type | OTP (One-Time Programmable) EPROM |
| Type de montage | Surface Mount (PLCC socket compatible) |
| Statut RoHS | Non-RoHS (legacy OTP process) |
Configuration des broches de PIC16C923-04I/L
| Broche 1 | SEG0 — LCD segment output 0 |
| Broche 2 | SEG1 — LCD segment output 1 |
| Broche 3 | SEG2 — LCD segment output 2 |
| Broche 4 | SEG3 — LCD segment output 3 |
| Broche 5 | SEG4 — LCD segment output 4 |
| Broche 6 | SEG5 — LCD segment output 5 |
| Broche 7 | SEG6 — LCD segment output 6 |
| Broche 8 | SEG7 — LCD segment output 7 |
| Broche 9 | SEG8 — LCD segment output 8 |
| Broche 10 | SEG9 — LCD segment output 9 |
| Broche 11 | SEG10 — LCD segment output 10 |
| Broche 12 | SEG11 — LCD segment output 11 |
| Broche 13 | SEG12 — LCD segment output 12 |
| Broche 14 | SEG13 — LCD segment output 13 |
| Broche 15 | SEG14 — LCD segment output 14 |
| Broche 16 | SEG15 — LCD segment output 15 |
| Broche 17 | SEG16 — LCD segment output 16 |
| Broche 18 | SEG17 — LCD segment output 17 |
| Broche 19 | SEG18 — LCD segment output 18 |
| Broche 20 | SEG19 — LCD segment output 19 |
| Broche 21 | SEG20 — LCD segment output 20 |
| Broche 22 | SEG21 — LCD segment output 21 |
| Broche 23 | SEG22 — LCD segment output 22 |
| Broche 24 | SEG23 — LCD segment output 23 |
| Broche 25 | VDD — Positive supply voltage |
| Broche 26 | VSS — Ground reference |
| Broche 27 | OSC1 — Oscillator input |
| Broche 28 | OSC2 — Oscillator output |
| Broche 29 | MCLR — Master clear reset (active low) |
| Broche 30 | COM0 — LCD common output 0 |
| Broche 31 | COM1 — LCD common output 1 |
| Broche 32 | COM2 — LCD common output 2 |
| Broche 33 | COM3 — LCD common output 3 |
| Broche 34 | RA0 — Port A bit 0 (digital I/O) |
| Broche 35 | RA1 — Port A bit 1 (digital I/O) |
| Broche 36 | RA2 — Port A bit 2 (digital I/O) |
| Broche 37 | RA3 — Port A bit 3 (digital I/O) |
| Broche 38 | RA4 — Port A bit 4 (digital I/O, T0CKI) |
| Broche 39 | RA5 — Port A bit 5 (digital I/O) |
| Broche 40 | RB0 — Port B bit 0 (digital I/O, INT) |
| Broche 41 | RB1 — Port B bit 1 (digital I/O) |
| Broche 42 | RB2 — Port B bit 2 (digital I/O) |
| Broche 43 | RB3 — Port B bit 3 (digital I/O) |
| Broche 44 | RB4 — Port B bit 4 (digital I/O) |
| Broche 45 | RB5 — Port B bit 5 (digital I/O) |
| Broche 46 | RB6 — Port B bit 6 (digital I/O, ICSCLK) |
| Broche 47 | RB7 — Port B bit 7 (digital I/O, ICSDAT) |
| Broche 48 | RC0 — Port C bit 0 (digital I/O) |
| Broche 49 | RC1 — Port C bit 1 (digital I/O) |
| Broche 50 | RC2 — Port C bit 2 (digital I/O) |
| Broche 51 | RC3 — Port C bit 3 (digital I/O, SCL) |
| Broche 52 | RC4 — Port C bit 4 (digital I/O, SDA) |
| Broche 53 | RC5 — Port C bit 5 (digital I/O, SDO) |
| Broche 54 | RC6 — Port C bit 6 (digital I/O, TX) |
| Broche 55 | RC7 — Port C bit 7 (digital I/O, RX) |
| Broche 56 | RD0 — Port D bit 0 (digital I/O) |
| Broche 57 | RD1 — Port D bit 1 (digital I/O) |
| Broche 58 | RD2 — Port D bit 2 (digital I/O) |
| Broche 59 | RD3 — Port D bit 3 (digital I/O) |
| Broche 60 | RD4 — Port D bit 4 (digital I/O) |
| Broche 61 | RD5 — Port D bit 5 (digital I/O) |
| Broche 62 | RD6 — Port D bit 6 (digital I/O) |
| Broche 63 | RD7 — Port D bit 7 (digital I/O) |
| Broche 64 | RE0 — Port E bit 0 (digital I/O) |
| Broche 65 | RE1 — Port E bit 1 (digital I/O) |
| Broche 66 | RE2 — Port E bit 2 (digital I/O) |
| Broche 67 | RF0 — Port F bit 0 (digital I/O) |
| Broche 68 | RF1 — Port F bit 1 (digital I/O) |
Applications typiques
PIC16C923-04I/L convient pour 6 applications: Consumer Appliance LCD Control Panels, Thermostat and HVAC Display Controllers, Industrial Instrumentation Front Panels, Automotive Dashboard Cluster Sub-Controllers, Medical Device Segment Displays, Vending Machine Payment/Display Modules.
Consumer Appliance LCD Control Panels
The PIC16C923-04I/L is well-suited to consumer appliance control panels in microwaves, washing machines, and refrigerators because its integrated LCD driver directly supports 32 segments x 4 commons (128 pixels) without external bias circuitry. The 4 MHz instruction cycle executes menu-driven UI updates fast enough to keep button-press latency under 100 ms. The OTP EPROM is acceptable for mature, high-volume appliance production where firmware is fixed at release.
Recommandé
Thermostat and HVAC Display Controllers
Wall-mounted thermostats and HVAC controllers benefit from the PIC16C923-04I/L's on-chip LCD driver, which eliminates the need for an external HT1621 or similar segment driver. The 52 I/O pins allow direct connection to keypad matrices, temperature sensors (NTC or digital like the MCP9808), and relay outputs. Industrial temperature range -40C to +85C ensures reliable operation in unheated equipment closets and outdoor enclosures.
Recommandé
Industrial Instrumentation Front Panels
Bench-top multimeters, process calibrators, and laboratory instruments use the PIC16C923-04I/L as a low-cost front-panel controller because it drives segment LCDs while also communicating over SPI or I2C to a main measurement ADC. The 176-byte RAM holds live readings, calibration constants, and menu state. The synchronous serial port (SSP) configurable as SPI or I2C enables direct connection to 4-digit or 8-digit display ADCs without glue logic.
Recommandé
Automotive Dashboard Cluster Sub-Controllers
Within automotive dashboard clusters (legacy platforms), the PIC16C923-04I/L serves as a sub-controller for odometer displays, gear-position indicators, and trip computer readouts. Its 52 I/O lines support direct keypad switches and LED backlight drivers, and the wide operating voltage range (2.5-6.0 V) tolerates 12 V automotive battery transients after external regulation. Note: new automotive designs should use AEC-Q100-qualified PIC16F families instead.
Recommandé
Medical Device Segment Displays
Non-critical medical devices such as blood-pressure monitors, digital thermometers, and infusion-pump segment displays leverage the PIC16C923-04I/L's LCD driver and low-power 2.5 V operation. The 500 ns instruction cycle is more than adequate for slow human-interface updates, and the integrated SSP port supports I2C communication with blood-pressure sensor ASICs. Use in non-life-critical Class I/II devices only; life-support equipment requires validated MCU families.
Recommandé
Vending Machine Payment/Display Modules
Vending and ticketing machines use the PIC16C923-04I/L to drive the price/credit LCD segment displays, scan keypad input, and communicate over SPI with the bill/coin acceptor. The OTP EPROM keeps the BOM cost low in price-sensitive high-volume deployments. The 68-pin PLCC package supports socketed field-replacement during maintenance, simplifying service operations across deployed fleets.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC16C923-04I/L — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC16C925-I/L | PIC16C923-04/L | PIC16C923T-04I/L | PIC16C924-04I/L | PIC16C923/JW | PIC16F946-I/L |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 68-pin PLCC (L) | 68-pin PLCC (L) - same | 68-pin PLCC (L) - same | 68-pin PLCC (L) - same | 68-pin PLCC (L) - same | 68-pin CERDIP windowed (JW) | 68-pin PLCC (L) - same |
| Max Clock Frequency | 4 MHz | 8 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz |
| Program Memory | 7 KB OTP EPROM | 7 KB OTP EPROM | 7 KB OTP EPROM | 7 KB OTP EPROM | 7 KB OTP EPROM | 7 KB EPROM (UV-erasable) | 14 KB Flash |
| RAM | 176 bytes | 176 bytes | 176 bytes | 176 bytes | 192 bytes | 176 bytes | 336 bytes |
| LCD Driver | 32 seg x 4 com | 32 seg x 4 com | 32 seg x 4 com | 32 seg x 4 com | 32 seg x 4 com | 32 seg x 4 com | 42 seg x 4 com |
| I/O Pins | 52 | 52 | 52 | 52 | 52 | 52 | 53 |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | 0C to +70C (Commercial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | Windowed EPROM (UV-erasable) | Flash (reprogrammable) |
| RoHS Compliance | Non-RoHS | Non-RoHS | Non-RoHS | Non-RoHS | Non-RoHS | Non-RoHS | RoHS compliant |
Principaux différenciateurs
- Higher maximum clock speed (8 MHz vs 4 MHz) in same package (vs PIC16C925-I/L)
- Reprogrammable Flash memory instead of OTP (vs PIC16F946-I/L)
- UV-erasable windowed EPROM for development (vs PIC16C923/JW)
Notes de conception
The PIC16C923-04I/L is OTP (One-Time Programmable). Once the EPROM is programmed, it cannot be electrically erased - only UV-erasable windowed (JW) variants allow re-programming. For prototype development, build with the PIC16C923/JW (CERDIP windowed) package on a development board first, then transition the validated firmware to the OTP L-package parts for production. Programming errors on OTP parts result in scrapped inventory.
The PIC16C923-04I/L operates from 2.5 V to 6.0 V. The internal LCD charge-pump bias generator draws additional current proportional to the display multiplex duty cycle and segment count - a fully-loaded 32-segment x 4-common display at 1/4 duty can add 200-400 uA. Decouple VDD with a 0.1 uF ceramic capacitor close to the IC pins, plus a bulk 10 uF electrolytic at the board power entry. For battery-powered designs, consider the PIC16F946 with its nanoWatt sleep modes instead.
Route the oscillator traces (OSC1, OSC2) as short as possible and keep them away from the LCD segment traces to avoid clock-noise coupling onto the display. The 68-pin PLCC package should be socketed in production designs to allow field replacement; use a machined-pin socket (e.g., 3M Textool) for reliability. Place a guard ring around the analog AVdd/AVss pins if used and route LCD backplane (COM) traces with sufficient width to handle the AC bias current.
Estimated: at 5 V supply and 4 MHz clock with full LCD load, the PIC16C923-04I/L typically draws 2-5 mA active current, dissipating roughly 10-25 mW. The 68-pin PLCC package has ample thermal headroom for this dissipation; no heatsink or thermal vias are required. Verify the design under worst-case ambient temperature (85C industrial) and maximum I/O loading to confirm junction temperature stays within Microchip's published spec.
Informations de conformité
Legacy OTP EPROM process uses non-RoHS lead finish. Not AEC-Q100 qualified - new automotive designs should use PIC16F families. Reach/halogen/conflict-mineral status not stated in available distributor data - use [DATA_NEEDED] for missing fields.
