PIC16C64A-20E/L - 8-Bit 20MHz OTP MCU, 3.5KB, 44-PLCC | Microchip
MPN： PIC16C64A-20E/L ✗ 停產PIC16C64A-20E/L 概覽
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data memory, and peripherals on one die. Within the broader taxonomy, a microcontroller belongs to the integrated circuit (IC) family and specifically the microcontroller subcategory, sitting alongside microprocessors, DSPs, and FPGAs. The PIC16C6X architecture uses a RISC (Reduced Instruction Set Computer) instruction set with only 35 single-word instructions, where all instructions execute in one cycle except program branches (two cycles), making code generation compact and deterministic for embedded developers.
Key features include a wide operating voltage range of 2.5V to 6.0V (commercial/industrial/extended grades), low-power consumption at 5V/4 MHz of approximately 15 µA typical and 3V/32 kHz of approximately 1 µA typical, a fully static design that supports DC to 20 MHz operation, an 8-bit timer/counter with 8-bit prescaler, a watchdog timer, and analog comparator peripheral support. The /L package suffix denotes the 44-lead PLCC (Plastic Leaded Chip Carrier) form factor, a J-lead surface-mount package well suited for socketed industrial designs and through-hole-friendly repair workflows.
The PIC16C64A-20E/L uses Harvard architecture with separate program and data buses, EPROM-based program storage, and CMOS fabrication. Its -20E speed designation indicates 20 MHz maximum clock at the Extended temperature range (-40°C to +125°C), distinguishing it from the standard 0°C to +70°C commercial version. This part falls under Microchip's "Not Recommended for new designs" status with the newer PIC16C65B suggested as a successor in the same family.
Typical applications include industrial automation control loops, consumer-electronics user-interface controllers, low-power battery sensing nodes, automotive body and chassis subsystems, and legacy embedded systems that require a stable CMOS OTP supply chain. The wide temperature range and 33 I/O count make it a fit for HMI panels, motor-control front ends, and instrumentation front ends.
When designing with this device, ensure in-circuit serial programming (ICSP) header access for OTP programming, validate the minimum 4.0V Vdd for 20 MHz operation, and budget for the OTP one-time-program window during production. Consider migrating to PIC16C65B or a flash-based PIC16F equivalent for new designs to gain re-programmability and modern peripherals.
This page synthesizes distributor pricing, drop-in package alternatives, and practical engineering notes not found in the manufacturer datasheet alone.
直接替換替代品，適用於 PIC16C64A-20E/L — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC16C64A-20E/L （相同外形與佔位） — 差異在於 Package, Mounting Type, Core, Data EEPROM, Timers.
PIC16C64A-20/L
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16C64A-10/L
✅ 直接替換聯絡詢價
查看資料表 →PIC16C64A-04/L
✅ 直接替換聯絡詢價
查看資料表 →PIC16C65B-20/L
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16C64A-04I/L
✅ 直接替換聯絡詢價
查看資料表 →PIC16C64A-10I/L
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC16C64A-04I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC16C64A-20E/L 最大額定值與電氣特性
| Manufacturer | Microchip Technology |
| Series | PIC 16C |
| Core Processor | PIC |
| Core Size | 8-Bit |
| 最大時脈頻率 | 20 MHz |
| Instruction Cycle Time | 200 ns |
| Program Memory Size | 3.5 KB (2K x 14) OTP |
| RAM Size | 128 x 8 |
| Number of I/O Pins | 33 |
| 封裝 / 外殼 | 44-PLCC (16.59 x 16.59 mm) |
| Operating Supply Voltage Range | 2.5 V to 6.0 V |
| 工作溫度範圍 | -40 °C to +125 °C (Extended, "E") |
| Supply Current (5 V / 4 MHz) | 15 µA typical |
| Supply Current (3 V / 32 kHz) | 1 µA typical |
| Program Memory Type | OTP EPROM |
| Architecture | Harvard, RISC, 35 single-word instructions |
| 安裝類型 | Surface Mount (PLCC J-lead) |
PIC16C64A-20E/L 腳位配置
| 腳位 1 | MCLR — Master Clear (Reset, active low) |
| 腳位 2 | RA0 — PORTA bit 0 (bidirectional I/O) |
| 腳位 3 | RA1 — PORTA bit 1 (bidirectional I/O) |
| 腳位 4 | RA2 — PORTA bit 2 (bidirectional I/O) |
| 腳位 5 | RA3 — PORTA bit 3 (bidirectional I/O) |
| 腳位 6 | RA4 — PORTA bit 4 / T0CKI (timer0 clock input) |
| 腳位 7 | RA5 — PORTA bit 5 / analog input |
| 腳位 8 | VSS — Ground reference |
| 腳位 9 | OSC1 — Oscillator input |
| 腳位 10 | OSC2 — Oscillator output / clock out |
| 腳位 11 | RC0 — PORTC bit 0 (bidirectional I/O) |
| 腳位 12 | RC1 — PORTC bit 1 (bidirectional I/O) |
| 腳位 13 | RC2 — PORTC bit 2 (bidirectional I/O) |
| 腳位 14 | RC3 — PORTC bit 3 (bidirectional I/O) |
| 腳位 15 | RC4 — PORTC bit 4 (bidirectional I/O) |
| 腳位 16 | RC5 — PORTC bit 5 (bidirectional I/O) |
| 腳位 17 | RC6 — PORTC bit 6 (bidirectional I/O) |
| 腳位 18 | RC7 — PORTC bit 7 (bidirectional I/O) |
| 腳位 19 | VSS — Ground reference |
| 腳位 20 | VDD — Positive supply voltage |
| 腳位 21 | RB0 — PORTB bit 0 / external interrupt |
| 腳位 22 | RB1 — PORTB bit 1 (bidirectional I/O) |
| 腳位 23 | RB2 — PORTB bit 2 (bidirectional I/O) |
| 腳位 24 | RB3 — PORTB bit 3 (bidirectional I/O) |
| 腳位 25 | RB4 — PORTB bit 4 (bidirectional I/O) |
| 腳位 26 | RB5 — PORTB bit 5 (bidirectional I/O) |
| 腳位 27 | RB6 — PORTB bit 6 / programming clock |
| 腳位 28 | RB7 — PORTB bit 7 / programming data |
| 腳位 29 | NC — Not connected (per datasheet pinout, reserved) |
| 腳位 30 | RD0 — PORTD bit 0 (bidirectional I/O) |
| 腳位 31 | RD1 — PORTD bit 1 (bidirectional I/O) |
| 腳位 32 | RD2 — PORTD bit 2 (bidirectional I/O) |
| 腳位 33 | RD3 — PORTD bit 3 (bidirectional I/O) |
| 腳位 34 | RD4 — PORTD bit 4 (bidirectional I/O) |
| 腳位 35 | RD5 — PORTD bit 5 (bidirectional I/O) |
| 腳位 36 | RD6 — PORTD bit 6 (bidirectional I/O) |
| 腳位 37 | RD7 — PORTD bit 7 (bidirectional I/O) |
| 腳位 38 | VSS — Ground reference |
| 腳位 39 | VDD — Positive supply voltage |
| 腳位 40 | RE0 — PORTE bit 0 / read control |
| 腳位 41 | RE1 — PORTE bit 1 / write control |
| 腳位 42 | RE2 — PORTE bit 2 / chip select control |
| 腳位 43 | NC — Not connected (per datasheet pinout, reserved) |
| 腳位 44 | NC — Not connected (per datasheet pinout, reserved) |
典型應用
PIC16C64A-20E/L 適用於 6 應用s: Industrial Automation Control, Consumer Electronics User Interface, Automotive Body and Chassis Subsystems, Battery-Powered Sensing Nodes, Legacy Embedded System Refresh, Instrumentation Front-End Controller.
Industrial Automation Control
The PIC16C64A-20E/L fits industrial PLC and sensor-interface boards thanks to its 33 digital I/O across five ports and 20 MHz instruction throughput. Its Extended -40 °C to +125 °C rating matches factory-automation thermal envelopes, while 128 bytes of RAM and 3.5 KB OTP suffice for ladder-logic replacement and discrete I/O scanning. The wide 2.5 V to 6.0 V supply range tolerates 24 V-derived industrial rails after regulation. Compared with switching to a flash MCU, the OTP EPROM supply chain keeps BOM stable for long production runs.
推薦
Consumer Electronics User Interface
The PIC16C64A-20E/L is well-suited for low-cost consumer UI panels where 33 I/O drive key-matrix scanning, LED indicators, and LCD multiplex control. The RISC core executes branch-light state machines in 200 ns per instruction, letting one MCU poll a 4x5 key matrix, debounce, and refresh an indicator array without timing pressure. Power consumption around 15 µA at 5 V/4 MHz typical keeps standby budgets low for AC-line-derived appliances. OTP code lock protects against firmware cloning.
推薦
Automotive Body and Chassis Subsystems
With its Extended -40 °C to +125 °C rating and 33 I/O, the PIC16C64A-20E/L is a fit for body controllers, wiper modules, mirror-adjust ECUs, and instrument cluster back-end drivers where automotive EOL parts are common. The OTP EPROM prevents field firmware tampering, while the Harvard RISC core delivers deterministic interrupt response for safety-relevant actuation. Note: this part is not AEC-Q100 qualified in the verified data, so it is typically used in non-safety automotive subsystems rather than critical chassis controllers.
推薦
Battery-Powered Sensing Nodes
The PIC16C64A-20E/L supports 3 V battery operation at 32 kHz with approximately 1 µA typical supply current, enabling multi-year coin-cell or two-AA-node duty cycles for remote sensors. Its fully static design lets the clock halt between samples without state loss, and its wide 2.5 V to 6.0 V range covers Li coin, alkaline, and regulated 3.3 V rails. 128 bytes RAM stores sampled data between wakes. The OTP program memory is well-matched to sealed sensor housings.
推薦
Legacy Embedded System Refresh
Engineers maintaining installed PIC16C64A-20E/L-based systems can use the same 44-PLCC footprint to swap in PIC16C65B for active-production lifecycle support. The PIC16C65B preserves the 20 MHz clock and OTP/EPROM architecture while adding timers and updated interrupt structure. This minimizes re-PCB work and lets existing ICSP programming fixtures continue to be used. The migration is suitable for medical-device, industrial-controller, and aerospace ground-support legacy designs.
推薦
Instrumentation Front-End Controller
The PIC16C64A-20E/L acts as a measurement front-end controller, sequencing analog multiplexers, triggering ADC conversions, and packaging results for host transmission. Its 33 I/O drive parallel display drivers and keyboard scan paths simultaneously. With 20 MHz instruction throughput, it can service a 10 kHz sample loop while refreshing a numeric display without jitter. Extended temperature ensures operation in outdoor instrumentation cabinets. The 3.5 KB OTP fits calibration tables and lookup firmware.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16C64A-20E/L — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC16C64A-20/L | PIC16C65B-20/L | PIC16C64A-04/L |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-PLCC | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 4 MHz |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP |
| RAM | 128 bytes | 128 bytes | 192 bytes (improved) | 128 bytes |
| Operating Temperature | -40 to +125 °C (Extended) | 0 to +70 °C (Commercial) | 0 to +70 °C (Commercial) | 0 to +70 °C (Commercial) |
| Operating Voltage | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.5 V to 6.0 V |
| I/O Pins | 33 | 33 | 33 | 33 |
| Lifecycle Status | NRND | NRND | Active | NRND |
主要差異化特點
- Extended -40C to +125C temperature grade (對比PIC16C64A-20/L)
- Active-production successor available in same footprint (對比PIC16C65B-20/L)
- 20 MHz full-speed operation at Extended temp (對比PIC16C64A-04/L)
設計說明
For reliable 20 MHz operation the PIC16C64A-20E/L requires Vdd of at least 4.0 V; at 2.5 V to 4.0 V the oscillator and instruction pipeline must be derated to lower clock rates. Use an LDO such as MCP1700 to hold Vdd steady. Decouple Vdd/Vss pairs with 100 nF X7R placed within 5 mm of each pin pair, and add a bulk 10 µF tantalum or ceramic cap near the MCU. The 15 µA typical at 5 V/4 MHz figure does not include I/O drive current - budget additional mA for heavily loaded ports.
Place the 44-PLCC socket with pin 1 marker matching the PCB silk-screen. Keep the crystal/oscillator traces short (<10 mm) and guarded by a ground ring to reduce EMI. The MCLR pin needs a 10 kΩ pull-up to Vdd and a 100 nF decoupling cap for reset noise immunity. The ICSP header (RB6/RB7/VDD/VSS/MCLR) should be brought to a 5-pin in-line connector for production programming without removing the MCU from board.
Estimated: at 20 MHz and 5 V supply, each I/O pin toggles every 200 ns, so external loads above 20 pF can cause ring-on transitions - add 33 Ω series resistors on high-fanout signals. Watchdog timer must be cleared in the main loop; software hangs without WDT service will trigger reset every ~18 ms nominal. OTP EPROM cannot be re-programmed - ensure code is fully debugged on a PIC16F equivalent or windowed PIC16C64A JW device before committing to OTP.
合規資訊
RoHS/REACH/lead-free status not confirmed in verified web data; the part uses 44-PLCC package which historically contains lead in PLCC socket options. AEC-Q100 not applicable to legacy 8-bit EPROM microcontrollers; verify with Microchip for any automotive qualification.
