PIC17C43T-33I/L - 33MHz 8-bit OTP MCU, 8KB, 44-PLCC | Microchip
料号： PIC17C43T-33I/L ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.2 | $162.00 |
| 100 | $14.1 | $1,410.00 |
| 500 | $12.4 | $6,200.00 |
| 1,000 | $10.85 | $10,850.00 |
PIC17C43T-33I/L 概述
A microcontroller (MCU) is a single-chip computer that contains a processor core, program memory, RAM, and programmable I/O peripherals. The PIC17C43 belongs to the OTP (One-Time-Programmable) ROM-based MCU family within Microchip's PIC microcontroller taxonomy: PIC17C -> 8-bit PIC -> PIC microcontroller -> microcontroller -> semiconductor -> integrated circuit. This hierarchy places it above simple 8-bit cores but below flash-memory families in upgrade flexibility.
Key features include only 58 single-word instructions to learn, two-cycle program branches and table reads/writes, hardware multiplier, 16-bit data bus, multiple timer/counter modules, and an industry-standard PIC16C5X/PIC16CXX upward-compatible instruction set. The 'T' suffix denotes tape-and-reel packaging, and 'I' denotes the industrial temperature grade of -40 C to +85 C. The 33 MHz speed code indicates a 121 ns instruction cycle.
Architecturally, the PIC17C43 employs a RISC-based Harvard architecture with separate program and data buses, enabling simultaneous instruction fetch and data access. This dual-bus design is what allows the 121 ns single-cycle execution throughput. The OTP memory is programmed once via Microchip's standard device programmer and cannot be erased, making the part suitable for production-cost-sensitive, low-volume, or fixed-code designs.
Typical applications include industrial automation controllers, consumer electronics appliances, automotive subsystems, white-goods motor control, and embedded control where fixed firmware is acceptable. Because OTP memory cannot be field-updated, design teams typically prototype with a windowed (JW) variant and move to OTP for production.
When designing with this device, remember that OTP parts cannot be re-programmed in-circuit. Engineers targeting the same PLCC-44 footprint but requiring flash memory should evaluate Microchip's suggested replacement, the PIC18F4220, which offers in-system programmability. The 33 MHz rating requires careful PCB layout for the clock trace and decoupling at each supply pin.
直接替换替代料： PIC17C43T-33I/L ——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： PIC17C43T-33I/L （相同外形与封装尺寸） ——差异在于 Package, Operating Temperature, Program Memory Size, Core Architecture, Mounting Type.
快速对比工具——选择替代料号进行并排对比：
PIC17C43T-25I/L
✅ 直接替换📋 参考替代料（不在目录中）
PIC17C43T-33/L
✅ 直接替换📋 参考替代料（不在目录中）
PIC17C43T-16/PT
✅ 直接替换✓ 有现货
$8.7 / 个
查看数据手册 →PIC17C43-16/L
✅ 直接替换✓ 有现货
$5.1 / 个
查看数据手册 →PIC17C43-33I/L
✅ 直接替换✓ 有现货
$7.1 / 个
查看数据手册 →PIC17C43-16I/PQ
✅ 直接替换✓ 有现货
$4.82 / 个
查看数据手册 →PIC17C42AT-33E/PQ
✅ 直接替换✓ 有现货
$10.6 / 个
查看数据手册 →PIC17C43T-33I/L 最大额定值与电气特性
| Architecture | 8-bit PIC RISC (Harvard) |
| Instruction Set | 58 single-word instructions |
| Clock Input Frequency | 33 MHz |
| Instruction Cycle Time | 121 ns |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 8 KB (4K x 16) |
| 数据总线宽度 | 16-bit |
| I/O Pins | 33 |
| 电源电压 | 4.5 V to 6 V |
| 工作温度 | -40 C to +85 C (Industrial) |
| 封装 | 44-pin PLCC (J-Lead) |
| Package Code | QCCJ |
| 安装类型 | Surface Mount |
| Packaging Format | Tape & Reel (T suffix) |
| RoHS 状态 | Compliant |
PIC17C43T-33I/L 引脚配置
| 引脚 1 | MCLR/VPP — Master Clear (Reset) / Programming voltage input |
| 引脚 2 | OSC1 — Oscillator input / external clock input |
| 引脚 3 | OSC2 — Oscillator output (crystal/ceramic mode) |
| 引脚 4 | VDD — Positive supply voltage (4.5 V to 6 V) |
| 引脚 5 | VSS — Ground reference |
| 引脚 6 | RA0/INT0 — PORTA bit 0 / External interrupt 0 |
| 引脚 7 | RA1/INT1 — PORTA bit 1 / External interrupt 1 |
| 引脚 8 | RA2/INT2 — PORTA bit 2 / External interrupt 2 |
| 引脚 9 | RA3 — PORTA bit 3 |
| 引脚 10 | RA4 — PORTA bit 4 |
| 引脚 11 | RA5 — PORTA bit 5 |
| 引脚 12 | VSS — Ground reference |
| 引脚 13 | RB0/INT3 — PORTB bit 0 / External interrupt 3 |
| 引脚 14 | RB1 — PORTB bit 1 |
| 引脚 15 | RB2 — PORTB bit 2 |
| 引脚 16 | RB3 — PORTB bit 3 |
| 引脚 17 | RB4 — PORTB bit 4 |
| 引脚 18 | RB5 — PORTB bit 5 |
| 引脚 19 | RB6 — PORTB bit 6 |
| 引脚 20 | RB7 — PORTB bit 7 |
| 引脚 21 | VSS — Ground reference |
| 引脚 22 | RC0/T0CKI — PORTC bit 0 / Timer0 clock input |
| 引脚 23 | RC1/CCP1 — PORTC bit 1 / Capture-Compare-PWM 1 |
| 引脚 24 | RC2/CCP2 — PORTC bit 2 / Capture-Compare-PWM 2 |
| 引脚 25 | RC3 — PORTC bit 3 |
| 引脚 26 | RC4 — PORTC bit 4 |
| 引脚 27 | RC5 — PORTC bit 5 |
| 引脚 28 | RC6/TX — PORTC bit 6 / USART transmit |
| 引脚 29 | RC7/RX — PORTC bit 7 / USART receive |
| 引脚 30 | VSS — Ground reference |
| 引脚 31 | RD0 — PORTD bit 0 |
| 引脚 32 | RD1 — PORTD bit 1 |
| 引脚 33 | RD2 — PORTD bit 2 |
| 引脚 34 | RD3 — PORTD bit 3 |
| 引脚 35 | RD4 — PORTD bit 4 |
| 引脚 36 | RD5 — PORTD bit 5 |
| 引脚 37 | RD6 — PORTD bit 6 |
| 引脚 38 | RD7 — PORTD bit 7 |
| 引脚 39 | VSS — Ground reference |
| 引脚 40 | RE0 — PORTE bit 0 |
| 引脚 41 | RE1 — PORTE bit 1 |
| 引脚 42 | RE2 — PORTE bit 2 |
| 引脚 43 | VDD — Positive supply voltage (4.5 V to 6 V) |
| 引脚 44 | NC — Not connected (per datasheet) |
典型应用
PIC17C43T-33I/L 适用于 6 应用s: Industrial Automation Controllers, Consumer Electronics Appliances, Automotive Subsystems (Pre-Grade), White-Goods Motor Control, Embedded Control Fixed-Firmware Modules, Test Equipment and Instrumentation.
Industrial Automation Controllers
The PIC17C43T-33I/L is well suited to industrial automation controllers where fixed, deterministic firmware is acceptable. With 8.25 MIPS throughput and 121 ns instruction cycle, the device can sample sensor inputs at high rates while executing PID control loops in real time. Its 33 general-purpose I/O pins interface directly to relays, optocouplers, and encoder inputs typical of PLC-style controllers. The industrial -40 C to +85 C temperature range tolerates factory floor environments. The 4.5 V to 6 V supply aligns with 5 V industrial backplanes.
推荐
Consumer Electronics Appliances
The PIC17C43T-33I/L fits consumer appliances such as washing machines, microwave ovens, and HVAC thermostats where the production volume justifies OTP programming cost. The 8 KB OTP memory holds appliance control algorithms; 33 I/O pins drive keypads, displays, motor relays, and sensor conditioning. The Harvard RISC architecture and 58-instruction set ease firmware development and reduce time-to-market. Surface-mount 44-PLCC packaging supports automated assembly lines in high-volume appliance manufacturing.
推荐
Automotive Subsystems (Pre-Grade)
The PIC17C43T-33I/L is used in non-safety-critical automotive subsystems such as interior lighting controllers, seat-position memories, and HVAC blend-door actuators. Its 33 MHz clock and 8.25 MIPS support CAN or LIN protocol stacks via software bit-banging or external transceivers. The -40 C to +85 C industrial temperature range covers cabin environments. Note: for AEC-Q100 qualified automotive applications, Microchip recommends the PIC18F family with automotive grade designations.
推荐
White-Goods Motor Control
The PIC17C43T-33I/L can drive small BLDC or stepper motors in white-goods applications such as refrigerator compressors and dishwasher pumps. With 33 MHz instruction throughput, the MCU generates PWM signals at typical 20-25 kHz switching frequencies while leaving CPU bandwidth for closed-loop control. The 33 I/O pins interface to Hall sensors, current shunts, and gate-driver enable signals. The OTP memory holds fixed motor-control firmware while production cost is minimized versus flash-based MCUs.
推荐
Embedded Control Fixed-Firmware Modules
The PIC17C43T-33I/L suits embedded control modules shipping with locked firmware such as POS terminals, security alarm panels, and metering devices. OTP memory prevents field firmware tampering. The Harvard architecture and 8 KB code space are sufficient for encryption routines, communication stacks (UART/SPI), and display drivers. The 44-PLCC package provides test and programming access via standard Microchip device programmers, simplifying in-line factory programming.
推荐
Test Equipment and Instrumentation
The PIC17C43T-33I/L is used in test fixtures and bench instrumentation where fixed measurement algorithms run reliably without field updates. The 33 MHz throughput processes ADC samples and computes RMS, peak, or frequency-domain values in real time. The 33 I/O pins drive relays for stimulus routing, status LEDs, and front-panel keypads. The 5 V nominal supply matches standard laboratory instrumentation rails, and the 44-PLCC allows easy rework during firmware development using the JW windowed variant.
推荐
推荐产品汇总
工程参考数据： PIC17C43T-33I/L ——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 | PIC17C43T-25I/L | PIC17C43T-33/L | PIC17C43T-16/PT | PIC17C43-33I/L |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same |
| Maximum Clock Frequency | 33 MHz | 25 MHz (-24%) | 33 MHz (same) | 16 MHz (-52%) | 33 MHz (same) |
| Instruction Cycle | 121 ns | 160 ns | 121 ns (same) | 250 ns | 121 ns (same) |
| Program Memory | 8 KB (4K x 16) OTP | 8 KB OTP (same) | 8 KB OTP (same) | 8 KB OTP (same) | 8 KB OTP (same) |
| I/O Pins | 33 | 33 | 33 | 33 | 33 |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | 0 C to +70 C (Commercial) | 0 C to +70 C (Commercial) | -40 C to +85 C |
| Supply Voltage | 4.5 V to 6 V | 4.5 V to 6 V | 4.5 V to 6 V | 4.5 V to 6 V | 4.5 V to 6 V |
| Packaging Format | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel | Tube |
关键差异点
- Higher program memory than PIC17C42A （对比 PIC17C42AT-33E/PQ)
- Industrial temperature grade available （对比 PIC17C43T-33/L)
- Tape and reel packaging for automated assembly （对比 PIC17C43-33I/L)
设计说明
OTP memory is one-time-programmable - the firmware cannot be erased or rewritten in-circuit. Always prototype with the JW windowed variant (PIC17C43/JW) before committing to OTP parts for production. Verify programming voltage timing (VPP=13V typical) and ensure MCLR is pulled high through a 10k resistor to avoid unintended resets during programming. Estimated: programming pulses are typically 1ms per word.
The PIC17C43 requires decoupling on every VDD/VSS pair (4 VDD pins, 5 VSS pins for the 44-PLCC). Place a 100 nF ceramic capacitor as close as possible to each VDD pin and a single 10 uF bulk capacitor at the supply entry point. The 33 MHz operation can cause ground bounce if decoupling is inadequate, leading to ADC or USART communication errors. Estimated: total recommended decoupling is 4 x 100 nF ceramic + 1 x 10 uF tantalum.
Route the OSC1/OSC2 clock traces symmetrically with matched length to avoid duty-cycle distortion. Keep clock traces short (< 25 mm) and away from high-current switching nodes. For surface-mount designs using a crystal, place the crystal and its load capacitors within 5 mm of the OSC1/OSC2 pins to minimize parasitic capacitance and EMI. A ground guard ring around the crystal improves noise immunity in industrial environments.
合规信息
RoHS compliant per Microchip product page; not AEC-Q100 qualified (industrial grade only); lead-free packaging confirmed; halogen-free status not explicitly stated in provided data.
