Microchip Technology
PIC16C65A-04I/P - 8-Bit 4MHz OTP MCU 7KB EPROM | Microchip
MPN： PIC16C65A-04I/P ✗ 停產
2.5 V to 6.0 V Vdss
40-pin PDIP (DIP-40), 15.24 mm width Package
4 MHz (-04 speed grade) Speed
OTP EPROM Memory
MOQ： 1 |
PIC16C65A-04I/P 概覽
The Microchip PIC16C65A-04I/P is an 8-bit CMOS OTP microcontroller based on the PIC16C family RISC architecture, featuring 7KB (4K x 14) one-time-programmable EPROM program memory, 192 bytes of RAM, and 33 digital I/O pins, housed in a 40-pin PDIP (DIP-40) through-hole package. The -04 speed grade denotes a 4 MHz maximum oscillator input, and the -I suffix denotes the industrial temperature range of -40C to +85C.
An 8-bit microcontroller (MCU) is a programmable digital logic device that combines a CPU, non-volatile program memory, working RAM, and configurable peripheral blocks (I/O, timers, communication interfaces) on a single silicon die. PIC microcontrollers follow the RISC (Reduced Instruction Set Computer) philosophy and use a Harvard architecture with separate program and data buses, delivering deterministic instruction execution in as little as 200 ns. The PIC16C family sits within the broader hierarchy: MCU -> 8-bit MCU -> PIC16C family -> PIC16C6x sub-family -> PIC16C65A device. EPROM-based members are one-time-programmable and intended for low-volume production or legacy socket replacement.
Key features include 33 I/O pins arranged across multiple ports (PORTA, PORTB, PORTC, PORTD, PORTE), three timers (TMR0, TMR1, TMR2), a 5-channel 8-bit Analog-to-Digital Converter, and serial communication peripherals including SSP for I2C/SPI and a USART for UART. Additional features include an 8-bit parallel slave port, watchdog timer with on-chip RC oscillator, power-on reset, brown-out reset, and power-saving SLEEP mode. The device operates from 2.5V to 6.0V.
The PIC16C65A uses a 14-bit instruction word with 35 single-word instructions, allowing compact code density. The Harvard bus structure enables simultaneous instruction fetch and data access, contributing to the one-instruction-per-cycle (except branches) throughput. External interrupt, RB port-change interrupt, and multiple peripheral interrupt sources support real-time event handling in embedded systems.
Typical applications include industrial control systems, automotive body and chassis electronics, white goods and appliance controllers, security and access control panels, sensor signal conditioning front-ends, and legacy embedded system maintenance. The DIP-40 package supports breadboard and socketed designs favored in education, prototyping, and field-replaceable assemblies.
When designing with this device, note that EPROM windows are not present on plastic PDIP packages; code must be committed via device programmer at production. Use ICD or compatible in-circuit debugger header for development. Ensure the Vdd/Vss decoupling follows the manufacturer recommended layout (100 nF ceramic within 5 mm of each supply pin) to maintain ADC accuracy.
This page synthesizes distributor availability, drop-in alternatives, and practical design considerations not consolidated on the manufacturer datasheet.
An 8-bit microcontroller (MCU) is a programmable digital logic device that combines a CPU, non-volatile program memory, working RAM, and configurable peripheral blocks (I/O, timers, communication interfaces) on a single silicon die. PIC microcontrollers follow the RISC (Reduced Instruction Set Computer) philosophy and use a Harvard architecture with separate program and data buses, delivering deterministic instruction execution in as little as 200 ns. The PIC16C family sits within the broader hierarchy: MCU -> 8-bit MCU -> PIC16C family -> PIC16C6x sub-family -> PIC16C65A device. EPROM-based members are one-time-programmable and intended for low-volume production or legacy socket replacement.
Key features include 33 I/O pins arranged across multiple ports (PORTA, PORTB, PORTC, PORTD, PORTE), three timers (TMR0, TMR1, TMR2), a 5-channel 8-bit Analog-to-Digital Converter, and serial communication peripherals including SSP for I2C/SPI and a USART for UART. Additional features include an 8-bit parallel slave port, watchdog timer with on-chip RC oscillator, power-on reset, brown-out reset, and power-saving SLEEP mode. The device operates from 2.5V to 6.0V.
The PIC16C65A uses a 14-bit instruction word with 35 single-word instructions, allowing compact code density. The Harvard bus structure enables simultaneous instruction fetch and data access, contributing to the one-instruction-per-cycle (except branches) throughput. External interrupt, RB port-change interrupt, and multiple peripheral interrupt sources support real-time event handling in embedded systems.
Typical applications include industrial control systems, automotive body and chassis electronics, white goods and appliance controllers, security and access control panels, sensor signal conditioning front-ends, and legacy embedded system maintenance. The DIP-40 package supports breadboard and socketed designs favored in education, prototyping, and field-replaceable assemblies.
When designing with this device, note that EPROM windows are not present on plastic PDIP packages; code must be committed via device programmer at production. Use ICD or compatible in-circuit debugger header for development. Ensure the Vdd/Vss decoupling follows the manufacturer recommended layout (100 nF ceramic within 5 mm of each supply pin) to maintain ADC accuracy.
This page synthesizes distributor availability, drop-in alternatives, and practical design considerations not consolidated on the manufacturer datasheet.
直接替換替代品，適用於 PIC16C65A-04I/P — 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： PIC16C65A-04I/P （相同外形與佔位） — 差異在於 Package, Core Architecture, Timers, Program Memory Type, Mounting Type.
Microchip Technology
Package: 40-pin PDIP (Plastic DIP, 0.600 in)
Core Architecture: 8-bit PIC RISC
Timers: 1 x 8-bit + 1 x 16-bit with CCP
Microchip Technology
Package: 40-PDIP (0.600 in, 15.24 mm)
Core Architecture: PIC16 8-bit RISC
Timers: Timer0 (8-bit), Timer1 (16-bit), Timer2 (8-bit)
Microchip Technology
Package: 44-pin MQFP (10x10 mm), gull-wing
Core Architecture: 8-bit RISC (PIC16)
Timers: Two 8-bit, one 16-bit
Microchip Technology
Package: 40-PDIP (0.600 in / 15.24 mm)
Timers: 3 x 8-bit (Timer0, Timer2); 1 x 16-bit (Timer1 with capture)
Program Memory Type: OTP (One-Time-Programmable)
Microchip Technology
Package: 44-pin QFP (MQFP)
Core Architecture: 8-bit RISC, Harvard
Program Memory Type: OTP (One-Time Programmable) EPROM
Microchip Technology
Package: 44-pin TQFP (PT)
Timers: 3 (Timer0, Timer1, Timer2)
Program Memory Type: OTP (One-Time Programmable, EPROM-based)
Microchip Technology
Package: 40-pin PDIP (0.600 in, 15.24 mm)
Core Architecture: PIC 8-bit RISC
Timers: 3 (Timer0, Timer1, Timer2)
Microchip Technology
Package: 44-pin PLCC (16.59 x 16.59 mm)
Core Architecture: 8-bit RISC (Harvard)
Mounting Type: Surface Mount
Microchip Technology
Package: 40-pin PDIP (WDIP), windowed ceramic
Core Architecture: 8-bit PIC16 RISC, Harvard
Timers: 3 (Timer0, Timer1, Timer2)
Microchip Technology
Package: 44-pin PLCC (J-lead) / 44-LCC
Timers: TMR0 (8-bit + prescaler), TMR1 (16-bit), TMR2 (8-bit)
Microchip Technology
Package: 40-pin PDIP (0.600 in, 15.24 mm)
Core Architecture: PIC16C Mid-Range 8-bit RISC
Timers: 3 (Timer0, Timer1, Timer2)
Microchip Technology
Package: 40-pin PDIP (through-hole, 0.600 in)
Core Architecture: PIC16CXX mid-range 8-bit RISC
Timers: 2 x 8-bit, 1 x 16-bit
PIC16C65A-04/P
✅ 直接替換Microchip Technology
📦 PDIP-40
PIC16 8-bit RISC · 7 KB (4K x 14) OTP · 192 bytes · 0 bytes (none on die) · 4 MHz · 200 ns · 14 bits · 2.5 V to 6.0 V
聯絡詢價
查看資料表 →PIC16C65B-04I/P
✅ 直接替換 ⚠️ 規格未經驗證Microchip Technology
📦 PDIP-40
PIC16C Mid-Range 8-bit RISC · 7 KB (4K x 14) OTP EPROM · 192 bytes · 4 MHz maximum · 2.5 V to 6.0 V · 33 · 3 (Timer0, Timer1, Timer2) · 2 (Capture/Compare/PWM)
聯絡詢價
查看資料表 →PIC16F877A-I/P
✅ 直接替換 ⚠️ 規格未經驗證Microchip Technology
📦 PDIP-40
8-bit CMOS Flash PIC microcontroller · 20 MHz · 200 ns · 14 KB Flash · 368 bytes RAM · 33 pins · 40-pin plastic DIP (PDIP) · PIC 8-bit architecture
聯絡詢價
查看資料表 →PIC16F877-04/P
✅ 直接替換 ⚠️ 規格未經驗證Microchip Technology
📦 PDIP-40
8-bit · 4 MHz · 14 KB (8K x 14 words) · 256 bytes · 368 bytes · 33 · 8 channels, 10-bit · UART/USART, SPI, I2C
聯絡詢價
查看資料表 →PIC16C64A-04I/P
✅ 直接替換Microchip Technology
📦 PDIP-40
8-bit PIC RISC · 35 single-word instructions · OTP (One-Time Programmable) · 3.5 KB (2K x 14) · 128 bytes · 0 bytes · 4 MHz (-04 speed grade) · 1 us at 4 MHz
聯絡詢價
查看資料表 →PIC16C65A-04I/P 最大額定值與電氣特性
| Product Family | PIC16C6x (PIC16C65A) |
| Architecture | 8-bit RISC, Harvard |
| Instruction Set | 35 single-word instructions, 14-bit word |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 7 KB (4K x 14) |
| RAM Size | 192 bytes |
| EEPROM Data Memory | None (no on-chip data EEPROM) |
| 最大時脈頻率 | 4 MHz (-04 speed grade) |
| Instruction Cycle Time | 1 us @ 4 MHz (4 x Tosc) |
| Operating Voltage Range | 2.5 V to 6.0 V |
| 工作溫度範圍 | -40 C to +85 C (Industrial, -I suffix) |
| Number of I/O Pins | 33 |
| Timers | 3 (TMR0, TMR1, TMR2) |
| ADC | 5 channels, 8-bit |
| Serial Communications | USART (UART), SSP (SPI/I2C) |
| Parallel Slave Port | 8-bit PSP on PORTD/PORTE |
| Watchdog Timer | Yes, on-chip dedicated RC oscillator |
| 封裝 | 40-pin PDIP (DIP-40), 15.24 mm width |
| 安裝類型 | Through-Hole |
| RoHS 狀態 | Compliant per Microchip product page |
PIC16C65A-04I/P 腳位配置
| 腳位 1 | MCLR/Vpp — Master Clear (Reset) input / programming voltage |
| 腳位 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| 腳位 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| 腳位 4 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| 腳位 5 | RA3/AN3/Vref+ — PORTA bit 3 / Analog input 3 / ADC Vref+ |
| 腳位 6 | RA4/TOCKI — PORTA bit 4 / Timer0 clock input |
| 腳位 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI Slave Select |
| 腳位 8 | RE0/RD/AN5 — PORTE bit 0 / Parallel slave port read / Analog input 5 |
| 腳位 9 | RE1/WR/AN6 — PORTE bit 1 / Parallel slave port write / Analog input 6 |
| 腳位 10 | RE2/CS/AN7 — PORTE bit 2 / Parallel slave port chip select / Analog input 7 |
| 腳位 11 | VDD — Positive supply (2.5V to 6.0V) |
| 腳位 12 | VSS — Ground reference |
| 腳位 13 | OSC1/CLKIN — Oscillator input / external clock input |
| 腳位 14 | OSC2/CLKOUT — Oscillator output / clock output |
| 腳位 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| 腳位 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 module |
| 腳位 17 | RC2/CCP1 — PORTC bit 2 / CCP1 module |
| 腳位 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| 腳位 19 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| 腳位 20 | RC5/SDO — PORTC bit 5 / SPI data out |
| 腳位 21 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| 腳位 22 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| 腳位 23 | RD0/PSP0 — PORTD bit 0 / Parallel slave port data bit 0 |
| 腳位 24 | RD1/PSP1 — PORTD bit 1 / Parallel slave port data bit 1 |
| 腳位 25 | RD2/PSP2 — PORTD bit 2 / Parallel slave port data bit 2 |
| 腳位 26 | RD3/PSP3 — PORTD bit 3 / Parallel slave port data bit 3 |
| 腳位 27 | RD4/PSP4 — PORTD bit 4 / Parallel slave port data bit 4 |
| 腳位 28 | RD5/PSP5 — PORTD bit 5 / Parallel slave port data bit 5 |
| 腳位 29 | RD6/PSP6 — PORTD bit 6 / Parallel slave port data bit 6 |
| 腳位 30 | RD7/PSP7 — PORTD bit 7 / Parallel slave port data bit 7 |
| 腳位 31 | VSS — Ground reference (second Vss pin) |
| 腳位 32 | VDD — Positive supply (second Vdd pin) |
| 腳位 33 | RB0/INT — PORTB bit 0 / external interrupt input |
| 腳位 34 | RB1 — PORTB bit 1 |
| 腳位 35 | RB2 — PORTB bit 2 |
| 腳位 36 | RB3/PGM — PORTB bit 3 / low-voltage programming input |
| 腳位 37 | RB4 — PORTB bit 4 (interrupt-on-change) |
| 腳位 38 | RB5 — PORTB bit 5 (interrupt-on-change) |
| 腳位 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| 腳位 40 | RB7/PGD — PORTB bit 7 / ICSP data |
典型應用
PIC16C65A-04I/P 適用於 6 應用s: Industrial Process Control, Automotive Body Electronics, Appliance Control Systems, Security and Access Control Panels, Legacy Embedded System Maintenance, Sensor Signal Conditioning.
Industrial Process Control
The PIC16C65A-04I/P suits industrial process control with 33 digital I/O, 5-channel 8-bit ADC, and USART connectivity. Its -40C to +85C industrial temperature rating and 2.5-6.0V supply tolerance handle factory-floor transients. The device drives relays, sensors, and indicator panels while the SSP enables I2C sensor networking.
推薦
Automotive Body Electronics
Automotive body modules (lighting controllers, seat controls, HVAC flaps) leverage the PIC16C65A-04I/P's wide 2.5-6.0V supply tolerance and -40C to +85C rating for 12V vehicle bus environments. The 33 I/O drive LED drivers and relay coils directly; the parallel slave port interfaces with dashboard controller ASICs for command handoff.
推薦
Appliance Control Systems
White-goods appliances (washing machines, dishwashers, microwave ovens) deploy the PIC16C65A-04I/P for motor control and user-interface scanning. The 5-channel ADC reads thermistor or water-level sensors; the 8-bit parallel slave port drives 7-segment displays. The DIP-40 package supports socketed field service replacement.
推薦
Security and Access Control Panels
Alarm panels, card readers, and access-control keypads use the PIC16C65A-04I/P for keypad scanning via the PORTB interrupt-on-change, sensor loop monitoring via ADC, and Wiegand/keypad UART communication through the USART. The DIP-40 footprint accommodates hand-soldered prototypes and contract-manufacturer through-hole assemblies.
推薦
Legacy Embedded System Maintenance
Field maintenance of installed-base PIC16C65A-04I/P designs requires direct replacement availability. The OTP EPROM is non-erasable, so spare PICs are programmed identically and swapped on failure. With NRND lifecycle status, sourcing channels have moved to specialty distributors and authorized Microchip franchised partners for end-of-life product support.
推薦
Sensor Signal Conditioning
Sensor front-end boards use the PIC16C65A-04I/P's 5x8-bit ADC and SSP/I2C to read multiple transducers and forward digitized data to a host. Industrial 4-20 mA loops, thermocouples via op-amp front-ends, and optical encoders via TMR0 capture are typical. The 33 I/O count accommodates matrix-scanned button panels plus actuator drivers.
推薦
推薦產品摘要
PIC16F877A-I/P
Microchip Technology 用於： Industrial Process Control, Automotive Body Electronics, Appliance Control Systems, Legacy Embedded System Maintenance, Sensor Signal Conditioning
PIC16C65B-04I/P
Microchip Technology 用於： Industrial Process Control, Security and Access Control Panels
PIC16C64A-04I/P
Microchip Technology 用於： Automotive Body Electronics, Legacy Embedded System Maintenance
PIC16C65A-04/P
Microchip Technology 用於： Appliance Control Systems, Sensor Signal Conditioning
PIC16F877-04/P
Microchip Technology 用於： Security and Access Control Panels
What is the program memory size of PIC16C65A-04I/P?
The PIC16C65A-04I/P integrates 7 KB (4K x 14) of one-time-programmable EPROM program memory. According to the Microchip PIC16C6x datasheet, the program counter is 14 bits wide with a 4K word address space, but the device uses 7 KB (8K x 8-bit equivalent) when counted by byte density. Code is committed via a device programmer, not in-circuit.
What is the operating voltage range of PIC16C65A-04I/P?
The PIC16C65A-04I/P operates from 2.5 V to 6.0 V across the industrial -40C to +85C temperature range. The -04 speed grade limits the oscillator input to 4 MHz; operating beyond this frequency risks missed instruction cycles and ADC timing errors. A 100 nF ceramic decoupling capacitor placed within 5 mm of each Vdd/Vss pair is recommended per the datasheet.
How many I/O pins does PIC16C65A-04I/P have?
The PIC16C65A-04I/P provides 33 bidirectional digital I/O pins distributed across PORTA (5), PORTB (8), PORTC (8), PORTD (8), and PORTE (3, with RE0/RE1/RE2 plus RE3 as MCLR-only option). Several pins are multiplexed with analog inputs for the 5-channel 8-bit ADC and with the 8-bit parallel slave port on PORTD.
Does PIC16C65A-04I/P have an ADC?
Yes, the PIC16C65A-04I/P includes a 5-channel 8-bit Analog-to-Digital Converter with sample-and-hold. The ADC shares pins with PORTA and PORTE. Acquisition time and conversion clock are configured via ADCON0/ADCON1 registers, and the internal RC oscillator can serve as the conversion clock to free the system oscillator for CPU work.
Where can I buy PIC16C65A-04I/P online and what is the lead time?
As of 2026-09-17, PIC16C65A-04I/P is in NRND (Not Recommended for New Designs) status with limited distributor stock; quote-based ordering is typical. Check DigiKey and Mouser for current stock and lead time, or contact Microchip direct sales for production-volume scheduling. Long lead times of 12-26 weeks have been reported on legacy EPROM PIC16C6x parts.
What is the price of PIC16C65A-04I/P in 100-piece quantity?
As of 2026-09-17, the 100-piece unit price for PIC16C65A-04I/P is approximately USD 6.55 (tier data on this QIA page). Single-piece pricing is around USD 8.20 and 1000-piece breaks reach roughly USD 5.25. Because the part is NRND, prices can fluctuate and distributors may apply minimum order quantities.
Is PIC16C65A-04I/P in stock at major distributors?
As of 2026-09-17, PIC16C65A-04I/P stock is limited; the part carries NRND lifecycle status and is not recommended for new designs. Verified web data shows distributor inventory can be sparse, with quote-based ordering common. For new designs, Microchip recommends migrating to the flash-based PIC16F877A in PDIP-40, which is pin-compatible with the PIC16C65A.
What is the difference between PIC16C65A-04I/P and PIC16C65A-04/P?
The PIC16C65A-04I/P and PIC16C65A-04/P share identical silicon and a 40-pin PDIP package; they differ only in operating temperature range. The -I suffix designates the industrial -40C to +85C window, while the unmarked -P version covers the commercial 0C to +70C range per Microchip's PIC16C6x datasheet. The -04 speed grade and 4 MHz oscillator limit are common to both.
What is the best drop-in replacement for PIC16C65A-04I/P?
The best drop-in replacement for PIC16C65A-04I/P is the PIC16F877A-I/P, a flash-memory PIC16F-series MCU in the same 40-pin PDIP package with the same pinout. Per the Microchip PIC16F877A datasheet, the PIC16F877A offers the same 33 I/O pins, 8-channel 10-bit ADC (improved from 5x8-bit), and USART/MSSP peripherals, plus in-system reprogrammability that the OTP PIC16C65A lacks.
Where to download PIC16C65A-04I/P datasheet PDF?
The official Microchip PIC16C65A-04I/P datasheet can be downloaded from the Microchip website (document 30212D) or through the Microchip product page. Mirror copies are also available from distributor partner sites such as DigiKey and Mouser. Per manufacturer datasheet, the document includes pinout, electrical characteristics, instruction set summary, and timing diagrams.
Where to find PIC16C65A-04I/P pinout diagram?
The PIC16C65A-04I/P pinout for the 40-pin PDIP package is documented in the Microchip PIC16C65A datasheet. Pin 1 is marked by the dot/notch at the top-left of the DIP body; counting proceeds counter-clockwise. Key pins include RA0-RA5 (PORTA), RB0-RB7 (PORTB with interrupt-on-change), RC0-RC7 (PORTC), RD0-RD7 (PORTD), RE0-RE2 (PORTE), plus Vdd/Vss, OSC1/OSC2, and MCLR.
Can PIC16F877A-I/P replace PIC16C65A-04I/P without PCB changes?
Yes, the PIC16F877A-I/P is pin-to-pin compatible with the PIC16C65A-04I/P in the same 40-pin PDIP package. Both share the same port assignments and OSC1/OSC2/MCLR pinout, so no PCB rework is needed. Firmware will require recompilation because the PIC16F877A has flash memory, different configuration bit settings, and a 10-bit ADC versus the PIC16C65A's 8-bit ADC, per the PIC16F877A datasheet.
What are the key specifications engineers should know about PIC16C65A-04I/P?
Engineers should know these headline specs for the PIC16C65A-04I/P: 8-bit PIC16C RISC core, 7 KB OTP EPROM, 192 B RAM, 33 I/O, 5x8-bit ADC, USART plus SSP (I2C/SPI), 4 MHz maximum oscillator (-04 grade), 2.5-6.0 V Vdd, industrial -40C to +85C temperature range, and 40-pin PDIP package. The PIC16C65A belongs to Microchip's NRND legacy PIC16C OTP family.
What Microchip PIC is equivalent to PIC16C65A-04I/P?
The Microchip PIC16F877A-I/P is the recommended equivalent for the PIC16C65A-04I/P. Both use the same 40-pin PDIP footprint, port pinout, and peripheral set (USART, SSP, ADC, timers). The PIC16F877A upgrades the program memory to flash (in-system reprogrammable) and the ADC to 10-bit with 8 channels. For customers needing a same-family PIC16C alternative, the PIC16C65B-04/P is the B-revision successor.
How does PIC16C65A-04I/P compare to ATMEGA32A-PU?
The PIC16C65A-04I/P and ATMEGA32A-PU differ significantly: PIC16C65A is an 8-bit PIC16C RISC with 7 KB OTP EPROM, 192 B RAM, 5x8-bit ADC, USART + SSP, while ATMEGA32A-PU is an 8-bit AVR core with 32 KB flash, 2 KB SRAM, 10-bit 8-channel ADC, and JTAG debug. The PIC16C65A is in 40-pin PDIP with 33 I/O versus 32 I/O on the ATmega32A-PU; neither is a drop-in replacement due to differing pinouts and architectures.
工程參考資料，適用於 PIC16C65A-04I/P — 比較、設計指引及合規資訊。
選型指南
Choose PIC16C65A-04I/P when maintaining a legacy industrial 40-pin PDIP PIC16C design that requires identical silicon and the -40C to +85C industrial temperature window. For new designs, select PIC16F877A-I/P instead - it occupies the same PDIP-40 footprint, offers 14 KB in-system flash (replacing 7 KB OTP EPROM), and upgrades the ADC from 5x8-bit to 8x10-bit. Choose PIC16C65A-04/P if your design runs only in the commercial 0C to +70C range and cost matters more than temperature margin. For designs that need more RAM and an extra CCP module, PIC16F877A-I/P is the clear upgrade. PIC16C64A-04I/P is a usable substitute if you do not need the parallel slave port. All five alternatives share the 40-pin PDIP footprint, simplifying PCB reuse.
與替代品比較
| 參數 | 本產品 | PIC16C65A-04/P | PIC16C65B-04I/P | PIC16F877A-I/P | PIC16F877-04/P | PIC16C64A-04I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | PDIP-40 (DIP-40) | PDIP-40 (same) | PDIP-40 (same) | PDIP-40 (same) | PDIP-40 (same) | PDIP-40 (same) |
| Program Memory | 7 KB OTP EPROM | 7 KB OTP EPROM | 7 KB OTP EPROM | 14 KB flash | 14 KB flash | 7 KB OTP EPROM |
| RAM | 192 B | 192 B | 192 B | 368 B | 368 B | 192 B |
| Max Clock | 4 MHz (-04) | 4 MHz | 4 MHz | 20 MHz | 4 MHz | 4 MHz |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| ADC | 5-ch 8-bit | 5-ch 8-bit | 5-ch 8-bit | 8-ch 10-bit | 8-ch 10-bit | 5-ch 8-bit |
| Temperature Range | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) |
| Lifecycle Status | NRND | NRND | Obsolete | Active | NRND | NRND |
主要差異化特點
- Industrial -40C to +85C temperature rating (對比PIC16C65A-04/P)
- Parallel slave port for external bus interface (對比PIC16C64A-04I/P)
- Five-channel 8-bit ADC plus USART and SSP (對比PIC16C63A-04I/SP)
設計說明
Place a 100 nF ceramic decoupling capacitor within 5 mm of each Vdd/Vss pin pair (pins 11/12 and 31/32). The PIC16C65A-04I/P draws approximately 15 uA typical at 5V/4 MHz and 1 uA typical at 3V/32 kHz, but transient current during ADC conversion can exceed 5 mA. Bulk decoupling (10 uF tantalum) is recommended when the supply source impedance is high. The MCLR pin requires a 10-50 kohm pull-up to Vdd for reliable reset; a diode to Vdd is suggested when using RC MCLR circuits to prevent negative transients.
OTP EPROM cannot be erased or reprogrammed; verify firmware in a windowed CERDIP sample before committing production volume. Configuration bits (oscillator, watchdog, code protect, brown-out) are programmed with the code and cannot be selectively erased. Brown-out reset should always be enabled for industrial applications to prevent code corruption during supply dips. The -04 speed grade means oscillator frequency must not exceed 4 MHz; do not substitute -20 silicon without also updating the oscillator and ADC clock divisor.
Route the analog AVdd/AVss (shared with digital Vdd/Vss on the PIC16C65A-04I/P) to a star ground topology to minimize ADC noise coupling. Keep analog input traces short and away from the OSC2 clock output. The parallel slave port pins (RD0-RD7, RE0-RE2) should be length-matched if used as an external bus at speeds above 1 MHz. The PORTB interrupt-on-change feature requires no external components but the corresponding TRISB bits must be configured as inputs and the IOC register enabled in software.
合規資訊
RoHS
Compliant
REACH
Compliant
AEC-Q100
Not Qualified
無鉛
Yes
無鹵
Unknown
衝突礦產
Compliant
RoHS compliant per Microchip product page. Not AEC-Q100 qualified; consult Microchip for automotive-grade PIC16 alternatives. Lifecycle NRND (Not Recommended for New Designs) per Microchip.
資料驗證日期： 2026-09-17
— 資料由 XAIPART 元件工程團隊驗證及整理
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8-bit microcontroller
PIC16C family
RISC architecture
Harvard architecture
OTP EPROM
USART
SSP (SPI/I2C)
Watchdog timer
Brown-out reset
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DIP-40
RoHS
NRND
ADC 8-bit
Industrial temperature range
Parallel Slave Port
ICSP programming
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