PIC18F6621-E/PT - 8-Bit 25MHz 64KB Flash MCU 64-TQFP | Microchip
料号： PIC18F6621-E/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $11.85 | $11.85 |
| 10 | $10.66 | $106.60 |
| 100 | $9.48 | $948.00 |
| 500 | $8.3 | $4,150.00 |
| 1,000 | $7.12 | $7,120.00 |
PIC18F6621-E/PT 概述
A PIC18 microcontroller is an 8-bit Harvard-architecture MCU from Microchip's PIC (Peripheral Interface Controller) family. Within the broader taxonomy, PIC18 sits above PIC10/12/16 baseline devices and below 16-bit dsPIC and 32-bit PIC32 families, offering a balance of cost, performance, and code density. The PIC18F6621 belongs to the 64/80-pin high-performance sub-family that targets human-machine interface (HMI), automotive, and industrial control applications requiring large memory and many I/Os.
Key features include 64KB enhanced Flash with self-programmability, 3.8KB RAM, 1KB EEPROM, an internal 8 MHz RC oscillator (with PLL up to 40 MHz), 12-bit A/D converter (8 channels), two USART modules, MSSP (SPI/I2C), and capture/compare/PWM modules. The 64-pin TQFP package has a 10x10 mm body with 0.5 mm pitch, supporting surface-mount assembly on standard PCB processes. The device is engineered for demanding embedded systems that need robust 5V power supply tolerance and reliable operation across -40C to +125C.
Typical applications include industrial control panels, automotive body and instrument cluster modules, white goods and appliance controllers, medical device user interfaces, and HMI touch-screen boards. The extended memory and rich peripheral set also suit point-of-sale terminals and small graphical-display controllers.
When designing, ensure the 5V supply is well decoupled with 100 nF ceramic plus bulk capacitance placed close to VDD/AVDD/VSS pins. Program/debug is done via ICSP using the PGC/PGD pins - reserve these on the schematic for in-circuit programming access. The internal oscillator with PLL should be used only after verifying peripheral timing margin across the full temperature range.
直接替换替代料： PIC18F6621-E/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： PIC18F6621-E/PT （相同外形与封装尺寸） ——差异在于 Timers, Package, Core Architecture, Operating Temperature, MSL Level.
快速对比工具——选择替代料号进行并排对比：
PIC18F6621-I/PT
✅ 直接替换✓ 有现货
$8.15 / 个
查看数据手册 →PIC18F6621T-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F6620T-I/PT
✅ 直接替换✓ 有现货
$4.18 / 个
查看数据手册 →PIC18F6722-I/PT
✅ 直接替换✓ 有现货
$5.32 / 个
查看数据手册 →PIC18F6622-I/PT
✅ 直接替换✓ 有现货
$5.62 / 个
查看数据手册 →PIC18F6525T-I/PT
✅ 直接替换✓ 有现货
$7.4 / 个
查看数据手册 →PIC18F6621-E/PT 最大额定值与电气特性
| Core Architecture | PIC18, 8-bit RISC, Harvard |
| 最大时钟频率 | 40 MHz (25 MHz per DigiKey listing) |
| Program Memory Type | Flash (enhanced, self-programmable) |
| Program Memory Size | 64 KB (32K x 16) |
| RAM Size | 3.8 KB |
| EEPROM Size | 1 KB |
| I/O Pins | 54 |
| Supply Voltage (VDD) | 4.2 V to 5.5 V |
| 工作温度范围 | -40 C to +125 C (extended "E" grade) |
| A/D Converter | 12-bit, 8 channels |
| Communication Interfaces | 2x USART, MSSP (SPI/I2C) |
| Timers | Multiple 8/16-bit timers with CCP modules |
| Package Type | TQFP-64 (10x10 mm, 0.5 mm pitch) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
| ICSP Programming | Yes (PGC/PGD/PGM pins) |
PIC18F6621-E/PT 引脚配置
| 引脚 1 | MCLR/RE3 — Master Clear / digital I/O (input only on RE3) |
| 引脚 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| 引脚 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| 引脚 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC VREF- |
| 引脚 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| 引脚 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| 引脚 7 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| 引脚 8 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| 引脚 9 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| 引脚 10 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| 引脚 11 | VDD — Positive supply voltage |
| 引脚 12 | VSS — Ground reference |
| 引脚 13 | OSC1/CLKI — Oscillator crystal input / external clock in |
| 引脚 14 | OSC2/CLKO — Oscillator crystal output / clock out |
| 引脚 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| 引脚 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| 引脚 17 | RC2/CCP1 — PORTC bit 2 / CCP1 |
| 引脚 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| 引脚 19 | RD0/PSP0 — PORTD bit 0 / parallel slave port bit 0 |
| 引脚 20 | RD1/PSP1 — PORTD bit 1 / parallel slave port bit 1 |
| 引脚 21 | RD2/PSP2 — PORTD bit 2 / parallel slave port bit 2 |
| 引脚 22 | RD3/PSP3 — PORTD bit 3 / parallel slave port bit 3 |
| 引脚 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| 引脚 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| 引脚 25 | RC6/TX1/CK1 — PORTC bit 6 / USART1 TX / USART1 clock |
| 引脚 26 | RC7/RX1/DT1 — PORTC bit 7 / USART1 RX / USART1 data |
| 引脚 27 | PGC — ICSP programming clock |
| 引脚 28 | PGD — ICSP programming data |
| 引脚 29 | AVDD — Analog positive supply |
| 引脚 30 | AVSS — Analog ground |
| 引脚 31 | VSS — Ground reference |
| 引脚 32 | VDD — Positive supply voltage |
| 引脚 33 | RB3/CCP2 — PORTB bit 3 / CCP2 alternate |
| 引脚 34 | RB4 — PORTB bit 4 |
| 引脚 35 | RB5/PGM — PORTB bit 5 / low-voltage ICSP enable |
| 引脚 36 | RB6/PGC — PORTB bit 6 / alternate ICSP clock |
| 引脚 37 | RB7/PGD — PORTB bit 7 / alternate ICSP data |
| 引脚 38 | RD4/PSP4 — PORTD bit 4 / parallel slave port bit 4 |
| 引脚 39 | RD5/PSP5 — PORTD bit 5 / parallel slave port bit 5 |
| 引脚 40 | RD6/PSP6 — PORTD bit 6 / parallel slave port bit 6 |
| 引脚 41 | RD7/PSP7 — PORTD bit 7 / parallel slave port bit 7 |
| 引脚 42 | RE0/RD — PORTE bit 0 / parallel slave port read |
| 引脚 43 | RE1/WR — PORTE bit 1 / parallel slave port write |
| 引脚 44 | RE2/CS — PORTE bit 2 / parallel slave port chip select |
| 引脚 45 | RF0 — PORTF bit 0 |
| 引脚 46 | RF1/AN6/C2OUT — PORTF bit 1 / analog input 6 / comparator 2 output |
| 引脚 47 | RF2/AN7/C1OUT — PORTF bit 2 / analog input 7 / comparator 1 output |
| 引脚 48 | RF3/AN8 — PORTF bit 3 / analog input 8 |
| 引脚 49 | RF4/AN9 — PORTF bit 4 / analog input 9 |
| 引脚 50 | RF5/AN10/CVREF — PORTF bit 5 / analog input 10 / comparator VREF |
| 引脚 51 | RF6/AN11 — PORTF bit 6 / analog input 11 |
| 引脚 52 | RF7 — PORTF bit 7 |
| 引脚 53 | RG0 — PORTG bit 0 |
| 引脚 54 | RG1 — PORTG bit 1 |
| 引脚 55 | RG2 — PORTG bit 2 |
| 引脚 56 | RG3 — PORTG bit 3 |
| 引脚 57 | RG4 — PORTG bit 4 |
| 引脚 58 | RG5 — PORTG bit 5 |
| 引脚 59 | RA6 — PORTA bit 6 |
| 引脚 60 | RA7 — PORTA bit 7 |
| 引脚 61 | RC8 — PORTC bit 8 / enhanced CCP |
| 引脚 62 | RC9 — PORTC bit 9 / enhanced CCP |
| 引脚 63 | RC10 — PORTC bit 10 |
| 引脚 64 | RC11 — PORTC bit 11 |
典型应用
PIC18F6621-E/PT 适用于 6 应用s: Industrial Control Panels, Automotive Body and Instrument Modules, White Goods and Appliance Controllers, Medical Device User Interfaces, Human-Machine Interface (HMI) Touch Panels, Point-of-Sale Terminals.
Industrial Control Panels
The PIC18F6621-E/PT suits industrial control panel applications because of its 54 I/O pins for keypads, LED indicators, and relay drivers, 64 KB Flash for ladder-logic and Modbus stacks, and extended -40C to +125C temperature grade for unconditioned factory-floor enclosures. Its 4.2-5.5V supply tolerance accepts noisy 24V-to-5V back-converter rails typical of PLC cabinets. The dual USART interfaces enable simultaneous RS-485 master and HMI display link. Compared to 3.3V-only PIC18F67J11, the 5V-native operation eliminates an LDO and reduces BOM cost.
推荐
Automotive Body and Instrument Modules
The PIC18F6621-E/PT is appropriate for automotive body controllers and instrument cluster modules because of its -40C to +125C extended temperature grade covering under-hood and cabin extremes, plus 5V native supply compatible with 12V battery rails after regulation. The 12-bit ADC handles sensor inputs (temperature, fuel level, position), and the PWM modules drive motor and lighting loads. For instrument clusters, the 64 KB Flash stores graphics tables and CAN/LIN protocol stacks. The TQFP-64 package is automotive-vibration tolerant when properly PCB-anchored.
推荐
White Goods and Appliance Controllers
The PIC18F6621-E/PT is well suited to white goods controllers (washing machines, dishwashers, refrigerators) because of its 5V tolerance, large I/O count for motor TRIAC drivers and user-interface key/LED matrices, and extended temperature range covering hot appliance interiors. The 64 KB Flash comfortably holds motor-control state machines and user-menu logic; the 3.8 KB RAM supports real-time display buffers. Compared to baseline PIC16F parts, the PIC18's 32 MIPS throughput simplifies sensor-fusion math for inverter compressor control.
推荐
Medical Device User Interfaces
The PIC18F6621-E/PT supports medical device user-interface boards (infusion pump keypads, blood-pressure monitor displays, diagnostic readout panels) because of its deterministic 8-bit architecture, 64 KB Flash for IEC-62304 class B firmware, and extended temperature range for clinical environments. The 12-bit ADC reads sensor inputs with adequate resolution for trend monitoring. Note that full medical certification requires additional IEC-60601-1 system-level work beyond component choice. The 5V-tolerant I/O eases connection to legacy medical-rail peripherals.
推荐
Human-Machine Interface (HMI) Touch Panels
The PIC18F6621-E/PT handles HMI touch-panel controller boards because of its 54 I/O count (driving segmented LCDs, key matrices, and UART-to-host), 64 KB Flash for menu logic, and dual USART for host-plus-debug channels. The 12-bit ADC reads resistive touch coordinates directly. Compared to PIC16F alternatives, the PIC18 instruction set accelerates GUI state-machine execution by ~3x. The TQFP-64 (10x10 mm) package fits behind mid-size (3-5 inch) display panels with adequate copper for thermal dissipation.
推荐
Point-of-Sale Terminals
The PIC18F6621-E/PT is appropriate for point-of-sale (POS) terminal sub-controllers because of its dual USART (one for receipt printer, one for card reader), 64 KB Flash for transaction-log buffering, and reliable extended-temperature operation in retail environments. The I2C MSSP talks to EEPROM for transaction history. Compared to 3.3V-only PIC18F parts, the 5V operation interfaces directly with legacy 5V printer logic without level shifters. The TQFP-64 footprint is standard enough for easy PCB rework on field-deployed terminals.
推荐
推荐产品汇总
工程参考数据： PIC18F6621-E/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 | PIC18F6621-I/PT | PIC18F6621T-I/PT | PIC18F6620T-I/PT | PIC18F6722-I/PT | PIC18F6622-I/PT | PIC18F6525T-I/PT |
|---|---|---|---|---|---|---|---|
| Package | TQFP-64 (10x10 mm) | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Flash Memory | 64 KB | 64 KB - same | 64 KB - same | 32 KB (-50%) | 128 KB (+100%) | 128 KB (+100%) | 48 KB (-25%) |
| RAM | 3.8 KB | 3.8 KB - same | 3.8 KB - same | 2 KB (-47%) | 3.8 KB - same | 3.8 KB - same | 3.8 KB - same |
| EEPROM | 1 KB | 1 KB - same | 1 KB - same | 1 KB - same | 1 KB - same | 1 KB - same | 1 KB - same |
| Max Clock Speed | 40 MHz | 40 MHz - same | 40 MHz - same | 40 MHz - same | 40 MHz - same | 40 MHz - same | 40 MHz - same |
| Supply Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V - same | 4.2 V to 5.5 V - same | 4.2 V to 5.5 V - same | 4.2 V to 5.5 V - same | 4.2 V to 5.5 V - same | 4.2 V to 5.5 V - same |
| Temperature Grade | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
关键差异点
- Extended temperature grade -40C to +125C （对比 PIC18F6621-I/PT)
- 5V-native operation （对比 PIC18F67J11-I/PT)
- 54 I/O pins in TQFP-64 （对比 PIC18F6620T-I/PT)
设计说明
Place a 100 nF ceramic decoupling capacitor within 5 mm of every VDD/VSS pin pair (pins 11/12 and 31/32). Add a 10 uF bulk tantalum or ceramic at the board supply entry. AVDD (pin 29) requires its own 100 nF decoupling close to the pin plus a ferrite bead or 10 ohm resistor to VDD to isolate analog from digital switching noise. Brown-out reset is enabled in configuration bits to ensure clean power-up; verify the BOR voltage threshold matches your supply tolerance.
Reserve the ICSP pins (PGC pin 27, PGD pin 28, MCLR pin 1, VDD, VSS) on a 5-pin 0.1-inch header or test pad for in-circuit programming access. The TQFP-64 (10x10 mm, 0.5 mm pitch) requires IPC-7351 nominal land patterns with 0.30 mm pad width and 0.20 mm pad-to-pad gap; ENIG surface finish is recommended over HASL for fine-pitch reliability. For automotive and high-vibration environments, use underfilled or corner-glued TQFP-64 packages per IPC-9701 standards.
Do not leave MCLR floating - it requires a 10 kohm pull-up to VDD. The PGM pin (RB5) must be pulled low or left NC for normal operation; only pull high to enable low-voltage ICSP. The internal 8 MHz RC oscillator with PLL gives 32 MHz (8 MIPS) but accuracy is only +/-2% - use an external crystal for CAN, USB, or Ethernet timing. Configuration bits must be set correctly to enable the watchdog timer, BOR, and oscillator mode or the MCU will fail to start.
Route the oscillator traces (OSC1/OSC2, pins 13/14) short and symmetric, guard-traced with ground, and keep them away from switching I/O and ADC inputs. The analog inputs AN0-AN11 share pins with digital I/O - if used as analog, the corresponding TRIS bit must be set to input. Place a 100 nF + 10 uF decoupling pair at AVSS/AVDD and route analog traces perpendicular to digital switching lines to minimize crosstalk.
合规信息
RoHS compliant per DigiKey verified listing 2026-09-28. AEC-Q100 marked not_applicable - the -E grade temperature range (-40C to +125C) is automotive-compatible but Microchip does not certify PIC18F6621 as AEC-Q100 qualified at the component level. Check Microchip product page for any auto-qualified -Q1 variants.
