PIC16C923-04I/PT - 8-Bit OTP MCU 7KB 4MHz 64-TQFP | Microchip
料号： PIC16C923-04I/PT ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $12.85 | $12.85 |
| 10 | $11.55 | $115.50 |
| 100 | $10.1 | $1,010.00 |
| 500 | $9.05 | $4,525.00 |
| 1,000 | $8.2 | $8,200.00 |
PIC16C923-04I/PT 概述
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (ROM/EPROM/Flash), working memory (RAM), and programmable I/O peripherals. The PIC16C family uses a RISC (Reduced Instruction Set Computer) Harvard architecture with only 35 single-word instructions, where every instruction except branches executes in a single instruction cycle (4 oscillator clocks). This architecture achieves high throughput per MHz and deterministic timing, which is why PIC MCUs have been adopted across industrial control, automotive subsystems, white goods, and battery-powered embedded products since the 1990s.
Key features of the PIC16C923 include the integrated LCD driver that offloads segment/commons timing from the CPU, a wide 3.0 V to 6.0 V operating voltage range suited to 5 V industrial logic rails, programmable code protection, a watchdog timer with on-chip RC oscillator for reliable operation without external components, and an enhanced capture/compare/PWM (ECCP) module. OTP (One-Time-Programmable) EPROM is field-programmable but not erasable, which fits cost-sensitive production runs.
Architecturally, the PIC16C923 uses an 8-bit ALU with a 14-bit instruction word, providing 4 KB of program address space (8K x 14 bits of EPROM). The peripheral set targets embedded human-machine-interface designs where a microcontroller, A/D front end, and LCD bias generation are co-located on a single die.
Typical applications include industrial control panels with integrated LCD readouts, consumer appliances with segmented displays, instrumentation front ends with A/D conversion, and security/alarm keypads. The integrated LCD driver removes the need for an external segment-driver IC, reducing both BOM cost and PCB area.
When designing with this device, engineers must plan code into the OTP window carefully because OTP memory cannot be re-programmed, and the 64-pin TQFP footprint requires careful PCB layout to maintain signal integrity on the LCD segment traces. A reliable programmer and verified in-circuit emulator are recommended for development.
This page synthesizes verified distributor pricing, drop-in same-package alternatives, and practical design notes that go beyond the manufacturer datasheet summary, giving procurement and design engineers a single reference for evaluation.
直接替换替代料： PIC16C923-04I/PT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC16C923-04I/PT （相同外形与封装尺寸） ——差异在于 LCD Driver, Package, Core Architecture, Mounting Type, Program Memory Size.
快速对比工具——选择替代料号进行并排对比：
PIC16C923-04/PT
✅ 直接替换✓ 有现货
$2.53 / 个
查看数据手册 →PIC16C923-08/PT
✅ 直接替换✓ 有现货
$7.2 / 个
查看数据手册 →PIC16C925-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC16C923T-04I/PT
✅ 直接替换✓ 有现货
$8.05 / 个
查看数据手册 →PIC16F946-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC16C924-04I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC16C923-04I/PT 最大额定值与电气特性
| Core | PIC16 (8-bit RISC) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 7 KB (4K x 14) |
| RAM Size | 176 B |
| EEPROM Size | None (OTP only) |
| Maximum CPU Speed | 4 MHz |
| Instruction Cycle | 200 ns (500 ns for branches) |
| Number of I/O Pins | 25 |
| Number of Instructions | 35 (single-word) |
| 封装 | 64-pin TQFP (10x10 mm) |
| 安装类型 | Surface Mount (Gull Wing) |
| Operating Voltage | 3.0 V to 6.0 V |
| 工作温度 | -40C to +85C (Industrial, "I") |
| LCD Driver | 32 segments x 4 commons integrated |
| A/D Converter | 8-bit, up to 5 channels |
| Serial Interfaces | SSP (SPI/I2C) + USART (SCI) |
| Timers | 3 x Timer/Counter (TMR0, TMR1, TMR2) |
| CCP Module | ECCP (Enhanced Capture/Compare/PWM) |
| Watchdog Timer | Yes (with on-chip RC oscillator) |
| RoHS 状态 | Compliant |
PIC16C923-04I/PT 64-pin tqfp (10x10 mm) 引脚配置指南
PIC16C923-04I/PT（64-pin tqfp (10x10 mm) 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： PIC16C923-04I/PT.
请参阅 数据手册 以查看完整引脚配置。
典型应用
PIC16C923-04I/PT 适用于 7 应用s: Industrial Control Panel with LCD Readout, Consumer Appliance with Segmented Display, Security Alarm Keypad, Portable Instrumentation Front End, HVAC Thermostat Controller, Automotive Aftermarket Accessory Display, Medical Device Front Panel (Non-Implantable).
Industrial Control Panel with LCD Readout
The PIC16C923-04I/PT's integrated 32-segment x 4-common LCD driver directly drives custom glass or character LCDs without an external segment-driver IC, which is ideal for industrial control panels that must display process variables on the front panel. The 8-bit A/D converter with up to 5 channels digitizes analog sensor signals such as 4-20 mA loops, thermocouple amplifiers, or potentiometer setpoints on the same chip. With 4 MHz CPU speed and 200 ns instruction cycle, the part comfortably handles keypad scanning, debounce, and LCD refresh loops at low power. The industrial -40C to +85C temperature grade suits factory-floor enclosures and unheated cabinets.
推荐
Consumer Appliance with Segmented Display
White goods such as washing machines, microwave ovens, and dishwashers require a microcontroller that can drive a segmented front-panel display, scan a keypad matrix, and control relays or triacs - exactly what PIC16C923-04I/PT provides on a single chip. The integrated LCD driver eliminates the cost of an external HT1621 or similar segment driver, while the ECCP module generates PWM outputs for motor speed control or triac-fired heater regulation. With 7 KB of OTP program memory, enough room exists for state-machine control logic, timing profiles, and safety diagnostics in mid-complexity appliances. The wide 3.0-6.0 V operating range tolerates unregulated rectified mains rails.
推荐
Security Alarm Keypad
A security alarm keypad benefits from PIC16C923-04I/PT's integrated LCD driver to show arm/disarm status, zone fault codes, and entry-delay countdowns on a small custom glass display. The PIC16C core runs the keypad scanning matrix, debounce, and event sequencing at 4 MHz while leaving CPU bandwidth free for the EEPROM-backed event log interface over the USART. The watchdog timer with on-chip RC oscillator provides autonomous recovery from EMI-induced lockups - essential for a product that may be installed in electrically noisy environments near mains wiring. OTP memory prevents field firmware tampering.
推荐
Portable Instrumentation Front End
Handheld instrumentation such as digital multimeters, environmental meters, and portable gas detectors needs an MCU with a low-power LCD bias generator, an A/D converter for sensor inputs, and enough I/O for switches and a buzzer - a profile that matches PIC16C923-04I/PT exactly. The integrated LCD driver saves power by maintaining a multiplexed display without constant CPU refresh, while the wide 3.0-6.0 V supply range lets designers run directly from a 3-cell AA battery pack or a buck/boost regulator. The 176-byte SRAM is adequate for measurement averaging buffers and menu state.
推荐
HVAC Thermostat Controller
Thermostat designs benefit from PIC16C923-04I/PT's 32-segment x 4-common LCD for displaying setpoint, ambient temperature, fan speed, and time-of-day on a single custom display. The ECCP module produces PWM outputs to drive TRIACs or relay coils for the compressor contactor, indoor blower, and reversing valve. The integrated 8-bit A/D digitizes thermistor dividers for ambient and supply-line temperature sensing, while the USART links to a Wi-Fi or sub-GHz module for cloud-connected smart-thermostat variants. Industrial temperature grade supports attic and basement installations.
推荐
Automotive Aftermarket Accessory Display
Aftermarket automotive accessories such as boost gauges, tire-pressure monitors, and tachometer add-ons use PIC16C923-04I/PT for its integrated LCD driver and A/D converter in a compact TQFP-64 footprint. The 8-bit A/D accepts 0-5 V sensor inputs for analog gauges, while the SPI/I2C synchronous serial port connects to external sensors or wireless receiver modules. The 4 MHz CPU speed is adequate for refresh rates of custom segmented displays, and the industrial temperature grade tolerates under-dash environments. Note: for OEM automotive applications, an AEC-Q100-qualified part should be selected instead.
推荐
Medical Device Front Panel (Non-Implantable)
Non-implantable medical devices such as bedside monitors, infusion pump keypads, and physiotherapy equipment use PIC16C923-04I/PT to drive front-panel segmented LCDs and read user input from membrane keypads. The integrated LCD driver and A/D converter reduce external component count for compact BOMs. The ECCP module generates PWM-driven buzzer tones for alarm signalling, while the USART communicates with the main processor board. Designers must verify regulatory compliance (IEC 60601, etc.) for the complete medical system; the MCU itself is not medical-grade certified.
推荐
推荐产品汇总
工程参考数据： PIC16C923-04I/PT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC16C923-04/PT | PIC16C923-08/PT | PIC16C925-I/PT | PIC16C923T-04I/PT | PIC16F946-I/PT | PIC16C924-04I/PT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same |
| Program Memory Type | OTP EPROM 7 KB | OTP EPROM 7 KB - same | OTP EPROM 7 KB - same | OTP EPROM 7 KB - same | OTP EPROM 7 KB - same | Flash 14 KB (reprogrammable) | OTP EPROM 7 KB - same |
| Max CPU Speed | 4 MHz | 4 MHz - same | 8 MHz (+100%) | 20 MHz (+400%) | 4 MHz - same | 20 MHz (+400%) | 4 MHz - same |
| Temperature Grade | Industrial -40C to +85C | Commercial 0C to +70C | Commercial 0C to +70C | Industrial -40C to +85C - same | Industrial -40C to +85C - same | Industrial -40C to +85C - same | Industrial -40C to +85C - same |
| LCD Driver | 32 seg x 4 com | 32 seg x 4 com - same | 32 seg x 4 com - same | 32 seg x 4 com - same | 32 seg x 4 com - same | 32 seg x 4 com - same | 32 seg x 4 com - same |
| Number of I/O Pins | 25 | 25 - same | 25 - same | 25 - same | 25 - same | 53 (Flash variant expands I/O) | 25 - same |
| Lifecycle Status (2026-09-19) | NRND | NRND | NRND | NRND | NRND | Active (recommended for new designs) | NRND |
| A/D Converter | 8-bit, 5 channels | 8-bit, 5 channels - same | 8-bit, 5 channels - same | 8-bit, 5 channels - same | 8-bit, 5 channels - same | 8-bit, 8 channels | 8-bit, 5 channels - same |
关键差异点
- Integrated 32-segment x 4-common LCD driver on-chip （对比 Generic PIC16F877A-I/P (no LCD driver, requires external HT1621))
- Mid-range PIC16 architecture with 35 single-word instructions （对比 PIC18 family parts (16-bit instruction word, 75 instructions))
- Wide 3.0 V to 6.0 V supply tolerance （对比 PIC16F946-I/PT (2.0 V to 5.5 V flash successor))
设计说明
OTP EPROM cannot be re-programmed. The PIC16C923-04I/PT uses One-Time-Programmable memory, so any code change after programming requires a new IC. For development cycles and field-updateable products, migrate to PIC16F946-I/PT (same TQFP-64 footprint, flash memory, Active lifecycle). Plan firmware revisions carefully before committing to OTP tooling.
The integrated LCD driver routes segment signals through PORTA/PORTB/PORTC pads and through dedicated SEG0-SEG31 pins; route these as short, parallel traces with consistent spacing to minimize crosstalk. Place the VLCD1/VLCD2/VLCD3 bypass capacitors (typically 0.1 uF ceramic) within 3 mm of their respective pins, and tie unused SEG and COM pins to VSS if the LCD is not populated, per datasheet guidance.
Estimated supply current: at 4 MHz CPU and 5 V VDD, PIC16C923-04I/PT draws typically 2-5 mA active and under 10 uA in sleep, per Microchip datasheet. Add a 10 uF bulk + 0.1 uF decoupling cap pair within 5 mm of the VDD/VSS pins. If the A/D converter is used, isolate AVDD/AVSS from VDD/VSS with a ferrite bead or filter and add a dedicated 0.1 uF + 10 uF pair at AVDD.
The 64-pin TQFP (10x10 mm body, 0.5 mm pitch) requires careful PCB layout: use 0.20-0.25 mm trace width between pads and via-in-pad or tented vias for fan-out. Land pattern per IPC-7351 (TQFP-64 pitch 0.5 mm). Keep the exposed thermal pad soldered to a moderate copper pour to reduce ground bounce on the digital ports, even though the part does not formally require a thermal pad.
合规信息
RoHS-compliant per Microchip product page; AEC-Q100 not qualified (not recommended for OEM automotive). For automotive applications, use AEC-Q100-qualified PIC16F equivalents.
