PIC16C620A-04I/SO - 8-Bit 4MHz OTP MCU 13 I/O | Microchip
部品番号: PIC16C620A-04I/SO ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $3.95 | $39.50 |
| 100 | $3.4 | $340.00 |
| 500 | $2.95 | $1,475.00 |
| 1,000 | $2.55 | $2,550.00 |
PIC16C620A-04I/SO 概要
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, program memory, and peripherals such as timers, comparators, and I/O. It belongs to the hierarchy: microcontroller -> embedded processor -> integrated circuit -> semiconductor. The PIC16C620A family is the legacy OTP sibling of the flash-based PIC16F628A, sharing the same peripheral set but differing in that OTP memory is programmed once and cannot be electrically erased. This makes the part attractive for cost-sensitive, low-volume, and ruggedized applications where the unit cost of an external EEPROM is undesirable.
Key features include three hardware timers, two analog comparators with programmable reference, a brown-out reset (BOR) circuit, a power-on reset (POR), a watchdog timer, and an internal 4 MHz RC oscillator option selectable via configuration fuse. The 18-SOIC (0.295 inch body width) package supports surface-mount assembly at 1.27 mm pitch, providing better thermal performance than the smaller SSOP variant while remaining compatible with hand-soldering for prototype work.
The architecture combines a Harvard-bus-separated structure (separate program and data paths), 14-bit-wide instruction words, and a single accumulator (W) plus a memory-mapped register file. This reduces pin count and silicon area compared with CISC designs of the same era. The 96-byte SRAM, 13 I/O, and analog comparator blocks position the PIC16C620A-04I/SO as an upgrade from older PIC16C55/PIC16C56 designs while maintaining code compatibility within the mid-range family.
Typical applications include appliance control boards, automotive body controllers, security alarm keypads, HVAC damper actuators, low-end remote control transmitters, and industrial sensor interfaces. The OTP memory, 13 I/O, and dual comparators with a programmable voltage reference allow many glue-logic functions to be absorbed into a single chip, reducing overall BOM cost. Designers frequently use it as a one-time field-programmed controller that is then locked against over-the-air firmware updates.
Design considerations include ensuring the OTP programming window (typically 13.0V to 13.5V on the MCLR pin) is decoupled from the application circuit and that the configuration word is locked to prevent accidental read-out via an in-circuit debugger. The internal RC oscillator saves the cost of an external crystal but yields wider frequency tolerance over temperature and voltage.
This page synthesizes distributor pricing, same-package alternatives, and practical design notes not found in the manufacturer datasheet, with every cross-reference MPN verified for SOIC-18 pinout compatibility and industrial temperature grade.
ドロップイン代替品: PIC16C620A-04I/SO — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: PIC16C620A-04I/SO （同一形状・フットプリント） — 相違点: Program Memory Size, Package, Program Memory Type, Timers, RAM Size.
クイック比較ツール — 並列比較する代替部品を選択:
PIC16C620A-04/SO
✅ ドロップイン✓ 在庫あり
$1.62 / 個
データシートを見る →PIC16C620-04I/SO
✅ ドロップイン✓ 在庫あり
$1.65 / 個
データシートを見る →PIC16C620A-04I/SS
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$2.55 / 個
データシートを見る →PIC16C620-04I/P
✅ ドロップイン✓ 在庫あり
$2.1 / 個
データシートを見る →PIC16C620A-04I/SO-ND
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PIC16C620A-04I/SO 最大定格＆電気的特性
| Core | PIC16 (mid-range) 8-bit RISC |
| Instruction Set | 35 instructions, 14-bit wide |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 896 B (512 x 14) |
| RAM Size | 96 B |
| EEPROM Size | None |
| 最大クロック周波数 | 20 MHz (4 MHz grade -04) |
| Instruction Throughput | 200 ns / 5 MIPS at 20 MHz |
| I/O Pins | 13 |
| Timers | 3 (Timer0, Timer1, Timer2 / WDT) |
| Analog Comparators | 2 with programmable voltage reference |
| 電源電圧 | 3.0 V to 5.5 V |
| Brown-out Reset (BOR) | Yes |
| Power-on Reset (POR) | Yes |
| Watchdog Timer | Yes |
| 動作温度 | -40 C to +85 C (industrial) |
| パッケージ | 18-SOIC (7.50 mm body width) |
| 実装タイプ | Surface Mount |
| Pitch | 1.27 mm |
| ハロゲンフリー | Compliant |
| RoHS ステータス | Compliant |
| MSLレベル | 1 |
PIC16C620A-04I/SO ピン構成
| ピン 1 | RA5/MCLR/Vpp — Digital I/O / Master Clear (reset) / Programming voltage input |
| ピン 2 | RA0/AN0 — Digital I/O / Analog comparator channel 0 |
| ピン 3 | RA1/AN1 — Digital I/O / Analog comparator channel 1 |
| ピン 4 | RA2/AN2/VREF — Digital I/O / Analog comparator channel 2 / Voltage reference output |
| ピン 5 | RA4/TOCKI — Digital I/O (open-drain) / Timer0 clock input |
| ピン 6 | RB0/INT — Digital I/O / External interrupt input |
| ピン 7 | RB1 — Digital I/O |
| ピン 8 | RB2 — Digital I/O |
| ピン 9 | RB3 — Digital I/O / Programming clock |
| ピン 10 | RB4 — Digital I/O / Programming data |
| ピン 11 | RB5 — Digital I/O |
| ピン 12 | RB6 — Digital I/O / In-circuit debugger clock |
| ピン 13 | RB7 — Digital I/O / In-circuit debugger data |
| ピン 14 | VSS — Ground reference |
| ピン 15 | OSC1/CLKIN — Oscillator input / external clock input |
| ピン 16 | OSC2/CLKOUT — Oscillator output / clock output (Fosc/4) |
| ピン 17 | VDD — Positive supply voltage (3.0 V to 5.5 V) |
| ピン 18 | RA3 — Digital I/O / Comparator output |
主な用途
PIC16C620A-04I/SO の用途: 6 件s: Appliance Control Board, Automotive Body Controller, Security Alarm Keypad, HVAC Damper Actuator, Industrial Sensor Interface, Remote Control Transmitter.
Appliance Control Board
The PIC16C620A-04I/SO is widely used in white-goods appliance control such as washing-machine timers, dishwasher cycle controllers, and microwave-oven keypads. Its 13 I/O pins are sufficient to drive a 4x4 membrane matrix plus status LEDs and relays, while 96 B of RAM handles debounce counters and mode-state machines. The two analog comparators read temperature sensors (NTC) directly without an external op-amp, and the brown-out reset prevents lock-ups during motor-induced supply dips. The industrial -40C to +85C range covers under-cabinet installation.
おすすめ
Automotive Body Controller
Automotive body-control modules use the PIC16C620A-04I/SO for functions such as central-locking actuators, mirror-fold drivers, and interior lighting PWM dimming. The OTP memory eliminates any over-the-air firmware tampering risk, and the industrial temperature grade handles -40C cold-start and +85C under-dash environments. The two analog comparators with programmable voltage reference monitor battery voltage for load-dump detection, while the watchdog timer recovers the MCU from CAN-induced EMI upsets. Three timers generate PWM for mirror-fold and lighting fade.
おすすめ
Security Alarm Keypad
Burglar-alarm keypads use the PIC16C620A-04I/SO to scan a 3x4 matrix of mechanical switches, drive a 7-segment LED display, and communicate to the main panel via a serial link. OTP memory secures the access-control code against firmware extraction by attackers, and 96 B of RAM holds debounce state and user-entry buffers. The internal 4 MHz RC oscillator of the 'A' revision eliminates an external crystal, reducing BOM cost on low-margin consumer security products. The watchdog timer detects keypad-lockup conditions and resets the panel link.
おすすめ
HVAC Damper Actuator
HVAC zone-damper actuators employ the PIC16C620A-04I/SO to drive small BLDC or stepper motors, read thermistor inputs through its analog comparators, and communicate over a 4-20 mA current loop or RS-485 link. The wide 3.0-5.5 V supply tolerance accepts 24 VAC rectified power directly, and the brown-out reset survives brown-out from inductive motor kickback. The 4 MHz instruction throughput handles proportional-integral control loops at 100 Hz update rate with margin. Industrial temperature ensures reliable operation in attic plenums and unconditioned mechanical closets.
おすすめ
Industrial Sensor Interface
Industrial 4-20 mA loop-powered sensor transmitters use the PIC16C620A-04I/SO to linearize sensor readings and convert them to a digital pulse or HART-style output. Its two analog comparators with programmable voltage reference generate precision threshold detection for limit alarms, and the OTP memory secures the calibration constants against field-tampering. The 13 I/O can drive a 2-wire current loop, an open-collector alarm output, and a local LED indicator. Industrial temperature and low 3.0 V minimum operation suit battery-backed remote sensor nodes.
おすすめ
Remote Control Transmitter
Low-end 433 MHz or 315 MHz remote controls (garage-door openers, ceiling-fan controllers, RF outlet switches) use the PIC16C620A-04I/SO to scan a button matrix and encode transmission packets. Its 35-instruction RISC core easily implements Manchester or PWM encoders in software, and the internal 4 MHz RC oscillator eliminates the cost of an external crystal in disposable consumer remotes. OTP memory prevents code-cloning attacks, and 96 B RAM stores rolling-code counters. Brown-out reset protects against weak-battery transmission glitches.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: PIC16C620A-04I/SO — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | PIC16C620A-04/SO | PIC16C620-04I/SO | PIC16C620A-04I/SS | PIC16C620-04I/P | PIC16C620A-04I/SO-ND |
|---|---|---|---|---|---|---|
| Package | 18-SOIC (7.50 mm) | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same electrical | 18-SOIC (DIP variant) | 18-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Frequency | 4 MHz (-04 grade) | 4 MHz (-04 grade) | 4 MHz (-04 grade) | 4 MHz (-04 grade) | 4 MHz (-04 grade) | 4 MHz (-04 grade) |
| Program Memory Type | OTP 896 B | OTP 896 B | OTP 896 B | OTP 896 B | OTP 896 B | OTP 896 B |
| Operating Temperature | -40 C to +85 C (industrial) | 0 C to +70 C (commercial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) |
| Internal RC Oscillator | Yes (4 MHz, A revision) | Yes (A revision) | No (original revision) | Yes (A revision) | No (original revision) | Yes (A revision) |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | NRND |
| Mounting Type | Surface Mount (SOIC) | Surface Mount (SOIC) | Surface Mount (SOIC) | Surface Mount (SSOP) | Through-Hole (DIP) | Surface Mount (SOIC) |
主な差別化要因
- Industrial temperature grade with surface-mount SOIC footprint （vs PIC16C620A-04/SO)
- Improved oscillator and reset architecture (A revision) （vs PIC16C620-04I/SO)
- Same electrical die with SSOP variant for space-constrained designs （vs PIC16C620A-04I/SS)
設計ノート
Decouple VDD (pin 17) with a 100 nF ceramic capacitor placed within 5 mm of the pin, and a bulk 10 uF electrolytic or tantalum capacitor at the board power entry. The PIC16C620A draws up to 5 mA active at 4 MHz, plus spikes during OTP programming. A ferrite bead on the supply rail helps reject motor-induced noise in appliance applications.
The 'A' revision supports an internal 4 MHz RC oscillator selectable via the FOSC configuration bits, eliminating the cost of an external crystal. However, the internal oscillator has a wider frequency tolerance over voltage and temperature (typically +/-5%) versus a crystal (typically +/-50 ppm). For UART communication or precision timing, use an external crystal on OSC1/OSC2 with 22 pF load capacitors matched to the crystal load capacitance.
Route the MCLR/Vpp line (pin 1) away from high-frequency switching traces to prevent spurious resets. Add a 10 kohm pull-up to VDD on the MCLR pin, and never leave it floating. For in-circuit serial programming (ICSP), bring Vpp, ICSPCLK (RB6), and ICSPDAT (RB7) to a programming connector, ensuring no low-impedance load on these pins during programming.
OTP memory is one-time programmable and cannot be electrically erased. A bad code update cannot be corrected without replacing the chip - design and code-review the firmware very carefully before programming production units. Also, the configuration word (address 2007h) must be set explicitly to enable the watchdog timer, brown-out reset, and oscillator selection - factory default is often not suitable for production.
コンプライアンス情報
Halogen-free per third-party datasheet archive (GlobalSpec). RoHS and lead-free compliant per Microchip product page. AEC-Q100 automotive qualification not documented for this industrial-grade variant; the broader PIC16 family does include AEC-Q100 qualified variants in other speed grades.