PIC16C620AT-04I/SS - 8-bit OTP MCU, 4MHz, 13 I/O | Microchip
MPN： PIC16C620AT-04I/SS ✗ 停產PIC16C620AT-04I/SS 概覽
What is a microcontroller? A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (ROM/EPROM/Flash), volatile data memory (RAM), and peripherals such as timers, ADCs, and communication interfaces. The PIC16C620AT-04I/SS sits within the broader taxonomy of embedded MCUs (microcontroller -> 8-bit MCU -> PIC16 family -> PIC16C62x sub-family), and within power management and control blocks of larger systems such as industrial controllers, automotive body modules, and white goods.
Key differentiating features of this device include its One-Time-Programmable (OTP) EPROM program memory (versus Flash in the 'F' variants), a wide operating voltage range of 3.0 V to 5.5 V, internal oscillator options, and an industrial-grade -40 °C to +85 °C temperature window. The 'I' suffix denotes industrial temperature range; the '04' denotes 4 MHz maximum oscillator frequency; and 'SS' denotes the 20-lead SSOP (5.30 mm body width).
Typical applications include battery chargers, small appliance controllers, security system keypads, and automotive body electronics. The combination of OTP memory, low power consumption, and rich peripheral set makes this part well suited to cost-sensitive, high-volume products where firmware is finalized at production time. System-level design should account for OTP programming infrastructure (PRO MATE II or equivalent) since OTP devices cannot be re-programmed in-circuit like Flash parts.
直接替換替代品，適用於 PIC16C620AT-04I/SS — 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： PIC16C620AT-04I/SS （相同外形與佔位） — 差異在於 Program Memory Type, Program Memory Size, Core Architecture, Package, Watchdog Timer.
PIC16C620A-04I/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16C620A-20I/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16C620A-20E/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16C620AT-04I/SS
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC16C620AT-04I/SS 最大額定值與電氣特性
| Core Architecture | PIC 16C, 8-bit RISC |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 896 B (512 x 14 words) |
| RAM Size | 96 B |
| EEPROM Size | None (OTP device) |
| 最大時脈頻率 | 4 MHz |
| Instruction Cycle Time | 1 us (at 4 MHz) |
| I/O Pins | 13 |
| Supply Voltage (Vdd) | 3.0 V to 5.5 V |
| Timers | 2 x 8-bit, 1 x 16-bit (with CCP) |
| USART | 1 x SCI/USART (synchronous + asynchronous) |
| Watchdog Timer | Yes (on-chip) |
| 工作溫度 | -40 C to +85 C (industrial) |
| 封裝 | 20-pin SSOP (5.30 mm body, 0.65 mm pitch) |
| 安裝類型 | Surface Mount |
| Programming Method | One-Time Programmable via PRO MATE II / ICD |
| Lead Finish | Matte Tin (Pb-free, per Microchip standard) |
PIC16C620AT-04I/SS 腳位配置
| 腳位 1 | RA2/AN2 — Port A bit 2 / analog input 2 |
| 腳位 2 | RA3/AN3 — Port A bit 3 / analog input 3 |
| 腳位 3 | RA4/T0CKI — Port A bit 4 / Timer 0 clock input |
| 腳位 4 | MCLR/VPP — Master clear reset / programming voltage input |
| 腳位 5 | VSS — Ground reference |
| 腳位 6 | RB0/INT — Port B bit 0 / external interrupt input |
| 腳位 7 | RB1 — Port B bit 1 |
| 腳位 8 | RB2 — Port B bit 2 |
| 腳位 9 | RB3 — Port B bit 3 |
| 腳位 10 | RB4 — Port B bit 4 |
| 腳位 11 | RB5 — Port B bit 5 |
| 腳位 12 | RB6 — Port B bit 6 |
| 腳位 13 | RB7 — Port B bit 7 |
| 腳位 14 | VDD — Positive supply voltage (3.0-5.5 V) |
| 腳位 15 | OSC2/CLKOUT — Oscillator output / clock out |
| 腳位 16 | OSC1/CLKIN — Oscillator input / external clock in |
| 腳位 17 | RA0/AN0 — Port A bit 0 / analog input 0 |
| 腳位 18 | RA1/AN1 — Port A bit 1 / analog input 1 |
| 腳位 19 | RA2 — Port A bit 2 (alt function) |
| 腳位 20 | RA3 — Port A bit 3 (alt function) |
典型應用
PIC16C620AT-04I/SS 適用於 6 應用s: Battery Charger Control, Security Keypad Controller, Small Appliance Control, Automotive Body Electronics, Industrial Sensor Signal Conditioning, Consumer Remote Control Transmitter.
Battery Charger Control
The PIC16C620AT-04I/SS is well suited to battery charger control: its 13 digital I/O pins connect directly to LED status indicators, current-sense amplifier output, and a relay driver MOSFET, while the on-chip 8-bit ADC and 16-bit timer with CCP enable closed-loop CC/CV (constant-current / constant-voltage) regulation. At a 4 MHz instruction rate the firmware can sample voltage and current at several kHz, which is more than adequate for lead-acid or Li-ion charge profiles. The 896 B OTP program memory is sufficient for a full charge profile table plus state-machine code, and the 96 B RAM accommodates live measurements without external SRAM. Industrial-grade -40 C to +85 C operation lets the same firmware run in garage chargers and outdoor solar controllers.
推薦
Security Keypad Controller
For alarm keypads and PIN entry panels, the PIC16C620AT-04I/SS provides the right balance of I/O, memory, and cost. The 13 I/O pins comfortably drive a 12-key 3x4 matrix (4 rows + 4 columns) plus a buzzer driver, status LEDs, and a relay trigger for the alarm loop. With 896 B of OTP, the controller can store 4 to 8 user PINs and run a small encryption/CRC check using the 16-bit CCP for timing debounce. The 96-byte RAM allows scratchpad storage for active keypad buffer and EEPROM emulation. OTP memory prevents code-recovery attacks, an advantage versus Flash for security panels that must resist firmware extraction.
推薦
Small Appliance Control
In small appliances such as coffee machines, microwave ovens, and induction cooktops, the PIC16C620AT-04I/SS handles user input, sensor sampling, and triac/relay switching in a single chip. The 4-channel ADC interfaces with temperature, humidity, or weight sensors; the 16-bit CCP drives triac phase-angle control or PWM for heater elements. Operating from 3.0 V to 5.5 V lets the same firmware run from a low-cost linear regulator on the mains-isolated secondary side. OTP code is finalized at production, removing any in-the-field reprogramming risk and reducing tooling cost for high-volume appliance SKUs.
推薦
Automotive Body Electronics
Within automotive body modules (window lift controllers, seat positioners, mirror adjusters), the PIC16C620AT-04I/SS -40 C to +85 C industrial temperature rating fits cabin-mounted systems that do not require AEC-Q100 under-hood qualification. Its 13 I/O pins drive H-bridge MOSFETs and sense end-stop switches; the on-chip timer subsystem generates PWM for soft-start motor control. The OTP memory locks the firmware, preventing service-bay code tampering. For under-hood or AEC-Q100 qualified designs, consider Microchip's PIC16F family in automotive grade instead, since the PIC16C620AT is not AEC-Q100 qualified.
推薦
Industrial Sensor Signal Conditioning
The PIC16C620AT-04I/SS works well as a low-cost front-end for industrial 4-20 mA loops, thermistor bridges, and opto-isolated switch inputs. The 8-bit ADC digitizes analog sensor outputs; the USART communicates the result over RS-485 or RS-232 with minimal external components. Industrial temperature range and OTP code stability make it suited to factory-floor installations where field firmware updates are restricted. The 13 I/O pins can drive indicator LEDs, accept digital interlocks, and read configuration DIP switches in a single compact SSOP-20 footprint.
推薦
Consumer Remote Control Transmitter
For RF remote controls and IR transmitters, the PIC16C620AT-04I/SS generates 38 kHz carrier modulation through its CCP module and scans a low-cost matrix keypad. OTP memory prevents firmware cloning by competitors, an advantage versus Flash for low-cost consumer SKUs. The 96-byte RAM handles keypad repeat counts and rolling-code buffers, while 896 B of program memory covers the full protocol stack including Manchester or PWM encoding. Low current consumption extends coin-cell battery life, and the SSOP-20 footprint fits inside slim remote housings.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16C620AT-04I/SS — 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 | PIC16C620A-04I/SS | PIC16C620A-20I/SS | PIC16C620A-20E/SS |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-SSOP (5.30 mm body, 0.65 mm pitch) | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same |
| Maximum Clock Frequency | 4 MHz | 4 MHz | 20 MHz (5x faster) | 20 MHz |
| Program Memory | 896 B OTP (512 x 14) | 896 B OTP - same | 896 B OTP - same | 896 B OTP - same |
| RAM | 96 B | 96 B | 96 B | 96 B |
| Operating Temperature | -40 C to +85 C (industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (extended) |
| I/O Pins | 13 | 13 | 13 | 13 |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete |
| Memory Type | OTP EPROM | OTP EPROM - same | OTP EPROM - same | OTP EPROM - same |
主要差異化特點
- OTP EPROM protects against firmware extraction (對比PIC16F628A-I/SS (Flash-based alternative))
- Industrial-grade -40 C to +85 C operation (對比PIC16C620AT-04/SS (commercial 0 C to +70 C variant))
- Compact 20-SSOP footprint saves PCB area (對比PIC16C620AT-04I/SO (20-SOIC variant))
設計說明
Because the PIC16C620AT-04I/SS uses One-Time-Programmable (OTP) EPROM, you cannot erase or rewrite firmware in-circuit. Estimate programming tooling cost (PRO MATE II, MPLAB PM3, or third-party Gang programmer) into the BOM for production. Always program a golden sample first, verify with full boundary-scan and functional tests, and only then commit to volume programming; OTP mistakes are permanent and destroy the device.
The PIC16C620AT-04I/SS draws approximately 2 mA active at 4 MHz and 5 V (per Microchip PIC16C62X datasheet typicals). Add a 100 nF decoupling capacitor directly between VDD (pin 14) and VSS (pin 5), placed within 3 mm of the pins. For battery-powered designs, the brown-out reset and watchdog timer should be enabled in configuration fuses to prevent code corruption during brown-out events.
The 20-SSOP package has 0.65 mm lead pitch and 5.30 mm body width. Pad geometry should follow IPC-7351 nominal SSOP-20 land pattern with 0.40 mm pad width and 0.30 mm pad length. Keep oscillator traces short (under 10 mm) and guard them with a ground pour to reduce EMI pickup. Place MCLR pull-up resistor (typically 10 kohm) within 5 mm of pin 4 to ensure proper reset behavior.
When migrating from PIC16C620AT-04I/SS to the Flash-based PIC16F628A-I/SS in the same SSOP-20 footprint, verify that port functions line up identically: PIC16F628A adds a USART on RB2/RB3 vs. the original PIC16C620A USART pin assignment. Check the Microchip migration document DS30081 before committing to a PCB redesign. The SSOP-20 footprint itself is drop-in compatible; only firmware changes are required.
合規資訊
AEC-Q100 is not applicable to the PIC16C620AT-04I/SS because it is not an automotive-qualified part; for AEC-Q100 designs, use the automotive-grade PIC16F family instead. Lead-free matte-tin finish per Microchip ordering nomenclature; RoHS and REACH status not confirmed in verified web data.