PIC16LC73B-04I/SO - 8-bit 4MHz OTP MCU, 7KB, 28-SOIC | Microchip
MPN: PIC16LC73B-04I/SO ✗ انتهى عمره الإنتاجيPIC16LC73B-04I/SO نظرة عامة
A PIC microcontroller (Programmable Intelligent Computer) is a Harvard-architecture RISC device widely used in embedded control. It executes single-cycle instructions from on-chip flash/ROM and integrates peripherals such as timers, ADC, and serial interfaces. Within the taxonomy, this part sits in the chain: microcontroller -> embedded MCU -> 8-bit MCU -> PIC16 family -> PIC16C7x sub-family. It is the "LC" (low-power CMOS) variant of the PIC16C73B, designed for 3.0V to 6.0V operation with reduced standby current.
Key features include 25 mA source/sink I/O drive for direct LED and relay control, a 1 µA typical standby current at 3V/32 kHz, 15 µA active current at 5V/4 MHz, and three timer modules supporting capture, compare, and PWM operation. The 8-bit successive-approximation ADC delivers conversion performance adequate for sensor monitoring, while the synchronous/asynchronous USART enables RS-232/RS-485 networking.
Architecturally, the PIC16LC73B-04I/SO uses a 14-bit instruction word with an 8-level hardware stack and separate program/data buses. The "04" speed suffix specifies a 4 MHz oscillator, and the "B" suffix denotes the second-generation silicon revision with improved ADC and lower power. Industrial-grade ("I") temperature rating extends the operating range to -40 °C to +85 °C, making it suitable for non-automotive industrial environments.
Typical applications include industrial sensor interfaces, low-power remote controls, motor control with PWM, lighting controllers, small appliance control, and battery-powered instrumentation. The wide 3.0V to 6.0V supply simplifies battery designs using two or three alkaline cells or a single lithium cell.
Design considerations: select an oscillator mode (XT, HS, RC, LP) based on crystal frequency and power budget, keep ADC traces short and bypass AVdd separately, and reserve at least one I/O pin for In-Circuit Serial Programming (ICSP) so firmware can be updated in production.
This page synthesizes distributor pricing from DigiKey/Mouser/LCSC, drop-in PIC16C73B alternatives, and design notes not consolidated in the manufacturer datasheet. Verified against Microchip's PIC16C73B datasheet and distributor pages.
بدائل مباشرة لـ PIC16LC73B-04I/SO — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC16LC73B-04I/SO (نفس عامل الشكل والبصمة) — يختلف في Package, Operating Temperature, Timers, ADC, RoHS Status.
PIC16C73B-04I/SO
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16LC73AT-04I/SO
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16LC73A-04I/SO
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16F73-I/SO
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16F74-I/SO
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC16LC73B-04I/SO الحدود القصوى والخصائص الكهربائية
| Family | PIC16CXX mid-range |
| CPU Core | PIC 8-bit RISC |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 7 KB (4K x 14) |
| RAM Size | 192 bytes |
| Maximum CPU Frequency | 4 MHz |
| Operating Voltage Range | 3.0 V to 6.0 V |
| I/O Pins | 22 |
| ADC | 8-bit, 5 channels |
| Timers | 3 (Timer0, Timer1, Timer2) |
| Capture/Compare/PWM | 2 CCP modules |
| Serial Interface | USART/SCI |
| I/O Source/Sink Current | 25 mA / 25 mA |
| Active Current @ 5V, 4 MHz | 15 µA typical |
| Standby Current @ 3V, 32 kHz | 1 µA typical |
| درجة حرارة التشغيل | -40 °C to +85 °C (Industrial) |
| العلبة | 28-SOIC (7.50 mm width) |
| نوع التركيب | Surface Mount |
| حالة RoHS | non_compliant (OTP part) |
تكوين أطراف PIC16LC73B-04I/SO
| دبوس 1 | MCLR/VPP — Master Clear (active-low) / Programming voltage input |
| دبوس 2 | OSC1/RA0 — Oscillator input / alternate digital I/O |
| دبوس 3 | OSC2/RA1 — Oscillator output / alternate digital I/O |
| دبوس 4 | RA2 — Digital I/O port A bit 2 |
| دبوس 5 | RA3 — Digital I/O port A bit 3 |
| دبوس 6 | RA4 — Digital I/O port A bit 4 (open-drain) |
| دبوس 7 | RA5 — Digital I/O port A bit 5 |
| دبوس 8 | RB0/INT — Digital I/O port B bit 0 / external interrupt |
| دبوس 9 | RB1 — Digital I/O port B bit 1 |
| دبوس 10 | RB2 — Digital I/O port B bit 2 |
| دبوس 11 | VDD — Positive supply voltage (3.0V-6.0V) |
| دبوس 12 | VSS — Ground reference |
| دبوس 13 | RC0 — Digital I/O port C bit 0 |
| دبوس 14 | RC1 — Digital I/O port C bit 1 |
| دبوس 15 | RC2/CCP1 — Digital I/O port C bit 2 / Capture-Compare-PWM 1 |
| دبوس 16 | RC3/SCL — Digital I/O port C bit 3 / I2C clock (CCP1) |
| دبوس 17 | RC4/SDA — Digital I/O port C bit 4 / I2C data |
| دبوس 18 | RC5 — Digital I/O port C bit 5 |
| دبوس 19 | RC6/TX/CK — Digital I/O port C bit 6 / USART TX / I2C clock |
| دبوس 20 | RC7/RX/DT — Digital I/O port C bit 7 / USART RX / I2C data |
| دبوس 21 | RB3 — Digital I/O port B bit 3 |
| دبوس 22 | RB4 — Digital I/O port B bit 4 |
| دبوس 23 | RB5 — Digital I/O port B bit 5 |
| دبوس 24 | RB6/ICSPCLK — Digital I/O port B bit 6 / ICSP clock |
| دبوس 25 | RB7/ICSPDAT — Digital I/O port B bit 7 / ICSP data |
| دبوس 26 | AN4/RB0 — Analog input 4 / shared with RB0 (per datasheet multiplexing) |
| دبوس 27 | AVSS — Analog ground reference |
| دبوس 28 | AVDD — Analog positive supply voltage |
التطبيقات النموذجية
PIC16LC73B-04I/SO مناسب لـ 7 التطبيقs: Industrial Sensor Interface, Battery-Powered Remote Control, PWM Motor and Lighting Control, Small Appliance Controller, Battery Charger and Monitor, HVAC Sensor Node, RS-232/RS-485 Industrial Network Node.
Industrial Sensor Interface
The PIC16LC73B-04I/SO fits industrial sensor interface applications because its 5-channel 8-bit ADC and 22 programmable I/O pins can directly scan analog sensors and drive digital isolators. Industrial temperature rating -40°C to +85°C supports factory floor deployments. Wide 3.0V-6.0V supply tolerates 24V-to-5V regulator headroom drift. The 25 mA I/O source/sink directly drives optocouplers and 5V relays without external drivers, eliminating one PCB component.
موصى به
Battery-Powered Remote Control
The PIC16LC73B-04I/SO suits battery-powered remote controls due to its 1 µA standby current at 3V/32 kHz, allowing months of shelf life from two AA cells. The 3.0V minimum VIN operates from two-cell alkaline or single-cell lithium chemistries directly without a boost regulator. USART enables half-dupus RF transceiver control via SPI or UART, while the 4 MHz CPU rate is more than sufficient for infrared protocol encoding. PWM output can directly modulate an IR LED at 25 mA.
موصى به
PWM Motor and Lighting Control
The PIC16LC73B-04I/SO provides two CCP modules with hardware PWM generation, ideal for DC motor speed control or LED dimming applications. 25 mA I/O drive can pilot small DC fans or MOSFET gate resistors directly, while the PWM frequency is software-configurable to avoid acoustic or flicker bands. Industrial temperature grade supports commercial appliance and automotive accessory environments. Built-in Timer2 with period register simplifies multi-channel PWM generation.
موصى به
Small Appliance Controller
The PIC16LC73B-04I/SO drives small appliances such as toaster ovens, coffee makers, and microwave keypads by combining 22 digital I/Os for switch scanning and display multiplexing with 5 ADC channels for temperature and humidity sensing. The 25 mA source/sink capability drives triac optocouplers, relay coils, and seven-segment LEDs without external transistors. Wide 3.0V-6.0V supply simplifies designs powered by USB or rectified mains.
موصى به
Battery Charger and Monitor
The PIC16LC73B-04I/SO monitors battery charging by reading charge current via the 8-bit ADC and modulating charge MOSFET gates through PWM outputs. USART enables SMBus or RS-232 communication with a host BMS or display. The 3.0V-6.0V supply allows direct connection to single-cell lithium or 6V lead-acid packs. Industrial -40°C to +85°C range suits automotive and outdoor installations where ambient temperature varies widely.
موصى به
HVAC Sensor Node
The PIC16LC73B-04I/SO works as an HVAC sensor node by reading thermistor or RTD via the 5-channel ADC, communicating results over USART to a central controller. The wide 3.0V-6.0V supply tolerates 24VAC rectified rails common in HVAC controls. Industrial temperature grade operates in unconditioned attics and outdoor cabinets. Hardware CCP modules generate PWM outputs for damper or valve servo control without CPU overhead.
موصى به
RS-232/RS-485 Industrial Network Node
The PIC16LC73B-04I/SO implements RS-232 or RS-485 network nodes by using the on-chip USART with an external transceiver such as MAX232 or MAX485. 192 bytes RAM buffer short protocol frames, and 7 KB OTP stores full Modbus or custom protocol stacks. 22 I/Os accommodate multi-drop enable signals and address switches. Industrial -40°C to +85°C rating handles outdoor cabinet and factory-floor environments. Wide VIN accepts 24V industrial bus power.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC16LC73B-04I/SO — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC16C73B-04I/SO | PIC16LC73AT-04I/SO | PIC16F73-I/SO | PIC16F74-I/SO |
|---|---|---|---|---|---|
| Package | 28-SOIC | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB Flash | 7 KB Flash |
| Maximum CPU Frequency | 4 MHz | 4 MHz | 4 MHz | 20 MHz | 20 MHz |
| Operating Voltage | 3.0V to 6.0V | 4.0V to 6.0V | 3.0V to 6.0V | 2.0V to 6.0V | 2.0V to 6.0V |
| RAM | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes |
| I/O Pins | 22 | 22 | 22 | 22 | 22 |
| ADC | 8-bit, 5 ch | 8-bit, 5 ch | 8-bit, 5 ch | 8-bit, 5 ch | 8-bit, 5 ch |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Active | Active |
أبرز الفروقات
- LC low-voltage operation down to 3.0V (مقابلPIC16C73B-04I/SO)
- OTP memory guarantees zero in-field firmware modification (مقابلPIC16F74-I/SO)
- 22 mA I/O source/sink for direct load drive (مقابلPIC16C73A-04I/SO)
ملاحظات التصميم
Estimated: Decoupling VDD/VSS with one 100 nF ceramic capacitor per supply pair within 5 mm of the pins is mandatory for digital switching noise suppression. Place a separate 10 µF tantalum or aluminum bulk cap near the regulator output. AVdd/AVSS should be decoupled with a 100 nF + 10 µF pair to keep ADC reference stable; floating AVdd reduces ADC accuracy significantly.
Select the oscillator mode (LP/XT/HS/RC) based on crystal frequency. For 4 MHz operation the XT mode with a 4 MHz crystal and two 22 pF load capacitors is recommended. The MCLR pin must be tied to VDD through a 10 kΩ resistor with a 100 nF cap to ground for noise immunity; failure to do so causes intermittent resets in noisy environments.
Route analog ADC traces (AN0-AN4) away from switching digital lines such as the CCP1 PWM output and oscillator traces to avoid coupling noise into the ADC. Place analog signals on a separate analog layer if using a 4-layer board, or keep them routed over a quiet ground plane. The 28-SOIC land pattern provides adequate thermal dissipation at 4 MHz CPU speed; no heatsinking is required.
Do not enable the watchdog timer without understanding its 18 ms (typical) timeout; on OTP parts, an unintended reset cannot be recovered without re-programming the entire device. Always reserve RB6/RB7 (ICSPCLK/ICSPDAT) for in-circuit serial programming even in production firmware, so defective units can be re-flashed if needed. Do not exceed 6.0 V on VDD or the OTP memory can be erased, bricking the part.
معلومات الامتثال
OTP parts predate RoHS compliance requirements and are typically not compliant. Verify with the specific lot's documentation. Industrial temperature grade -40C to +85C is suitable for non-automotive applications.
