PIC16C620AT-20/SO - 8-bit OTP MCU, 20 MHz, 896B | Microchip
MPN: PIC16C620AT-20/SO ✗ اختتامِ زندگیPIC16C620AT-20/SO جائزہ
An 8-bit microcontroller (MCU) is a single-chip computer that combines a CPU, non-volatile program memory, working RAM, and peripheral interfaces on one piece of silicon. Within the broader taxonomy, the PIC16C620A belongs to the OTP-MCU family -> 8-bit PIC microcontrollers -> PICmicro family -> Microchip 8-bit MCU portfolio -> embedded microcontrollers -> semiconductors. Its RISC Harvard architecture and 35-instruction instruction set make it well suited to deterministic real-time control where predictable interrupt latency matters more than raw throughput.
Key features include a hardware USART, 8-bit ADC with 4-channel mux, two 8-bit timers (Timer0/Timer2) plus one 16-bit timer (Timer1), on-chip watchdog timer with its own on-chip RC oscillator, and a programmable code protection mechanism that secures the OTP image. Brown-out-reset (BOR) circuitry and power-on-reset (POR) are integrated, simplifying external reset-tree design. The PIC16C620A also exposes an ICD (In-Circuit Debug) interface for MPLAB ICD 2/3 programming during development.
Architecturally, the PIC16C620A separates program and data buses (Harvard), uses a 14-bit instruction word, and pipelines fetch-and-execute so most instructions complete in one cycle. The 20 MHz Fosc yields a 5 MIPS peak instruction rate; typical applications run at 4 MHz / 1 MIPS for low-power or EMI-sensitive use. CMOS process technology keeps quiescent current in the low milliamp range, and the sleep mode drops consumption to under 1 uA for battery-friendly duty-cycled designs.
Typical applications include low-cost consumer appliances, security keypads and access-control panels, small motor-control boards, IR remote receivers, and battery-backed sensor interfaces. The 13-I/O budget is sufficient for matrix keypads, LED indicators, and a serial link to a host controller.
When designing, place a 100 nF decoupling capacitor within 5 mm of the VDD pin, reserve a 4-10 MHz crystal footprint (or use the internal RC mode for BOM reduction), and never connect MCLR floating - tie it to VDD through a 10 kohm resistor or drive it with the host. Designers upgrading older PIC16C5X designs will appreciate the software-compatible instruction set.
This page synthesizes distributor pricing, drop-in same-package alternatives (PIC16C620A, PIC16C620, PIC16C621A, PIC16C622A families), and practical design notes not found in the manufacturer datasheet alone.
کے لیے ڈراپ اِن متبادل PIC16C620AT-20/SO — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں PIC16C620AT-20/SO (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Operating Temperature, Package, RoHS Status, Program Memory Size, Program Memory Type.
PIC16C620A-20/SO
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C620-20/SO
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
PIC16C620A-04/SO
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C620A-40/SO
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C621AT-20I/SO
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C622AT-20I/SO
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C620AT-20/SO زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Core Architecture | 8-bit RISC (Harvard) |
| Family | PIC16C Series (PIC16C620A) |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 896 B (512 x 14) |
| RAM Size | 96 B |
| EEPROM Size | None (external support only) |
| زیادہ سے زیادہ کلاک فریکوئنسی | 20 MHz |
| Instruction Cycle | 200 ns |
| Operating Voltage (Vdd) | 3.0 V to 5.5 V |
| I/O Pins | 13 |
| Timers | 1 x 8-bit, 1 x 16-bit |
| ADC | None (PIC16C620A has no ADC) |
| پیکیج | 18-pin SOIC (SO) 0.295" (7.50 mm) width |
| آپریٹنگ درجہ حرارت | 0 C to +70 C (commercial) |
| ماؤنٹنگ ٹائپ | Surface Mount |
| RoHS اسٹیٹس | Non-compliant (OTP PIC16C family is typically non-RoHS) |
| Lead-Free | No (leaded OTP windowed/standard) |
| Watchdog Timer | Yes (with dedicated on-chip RC oscillator) |
| Brown-Out Reset | Yes |
| In-Circuit Debug | Yes (MPLAB ICD 2/3) |
| ICSP (In-Circuit Serial Programming) | Yes |
PIC16C620AT-20/SO پن کنفیگریشن
| پن 1 | RA2 — Bidirectional I/O port A bit 2 |
| پن 2 | RA3 — Bidirectional I/O port A bit 3 |
| پن 3 | RA4/T0CKI — Bidirectional I/O port A bit 4 / Timer0 clock input |
| پن 4 | MCLR/VPP — Master Clear (Reset) input / Programming voltage |
| پن 5 | VSS — Ground reference |
| پن 6 | RB0/INT — Bidirectional I/O port B bit 0 / External interrupt |
| پن 7 | RB1 — Bidirectional I/O port B bit 1 |
| پن 8 | RB2 — Bidirectional I/O port B bit 2 |
| پن 9 | RB3 — Bidirectional I/O port B bit 3 |
| پن 10 | RB4 — Bidirectional I/O port B bit 4 (interrupt-on-change) |
| پن 11 | RB5 — Bidirectional I/O port B bit 5 (interrupt-on-change) |
| پن 12 | RB6 — Bidirectional I/O port B bit 6 (interrupt-on-change / ICSP clock) |
| پن 13 | RB7 — Bidirectional I/O port B bit 7 (interrupt-on-change / ICSP data) |
| پن 14 | VDD — Positive supply voltage (3.0 V to 5.5 V) |
| پن 15 | OSC2/CLKOUT — Oscillator crystal output / Clock output |
| پن 16 | OSC1/CLKIN — Oscillator crystal input / External clock input |
| پن 17 | RA0 — Bidirectional I/O port A bit 0 |
| پن 18 | RA1 — Bidirectional I/O port A bit 1 |
عام استعمالات
PIC16C620AT-20/SO کے لیے موزوں ہے 6 ایپلیکیشنs: Consumer Appliance Control Board, Security Keypad and Access Control, Small Motor-Control Board (DC/Fan), IR Remote Receiver Decoder, Battery-Backed Sensor Interface, Industrial 5V Logic Replacement.
Consumer Appliance Control Board
The PIC16C620AT-20/SO fits consumer appliance control boards (washing machines, dishwashers, microwave ovens) where mature OTP firmware drives relays, triacs, and LED indicators at lowest unit cost. Its 13 I/O pins directly drive a 4x4 keypad matrix with room for status LEDs and a UART link to the main inverter board, while the integrated watchdog timer with its own on-chip RC oscillator ensures the controller recovers from EMI-induced lockups in motor-noise environments. The 20 MHz / 5 MIPS throughput handles timing-critical zero-crossing triac control at 50/60 Hz line frequencies. Compared to switching to a flash MCU, OTP is acceptable here because firmware is finalized at production launch and the 18-pin SOIC footprint survives multiple appliance generations.
تجویز کردہ
Security Keypad and Access Control
The PIC16C620AT-20/SO suits security keypads and access-control panels because its 13 I/O pins can scan a 3x4 or 4x4 matrix keypad, drive a piezo buzzer, interface an EEPROM for credential storage, and communicate with a host controller over UART. Brown-out-reset and the watchdog timer with on-chip RC oscillator prevent lockup-induced security bypass, while the 200 ns instruction cycle debounces key presses and runs small finite-state machines in real time. The 896 B OTP holds the access-control finite-state machine plus a custom encryption routine, and the 96 B RAM stores the current user entry buffer.
تجویز کردہ
Small Motor-Control Board (DC/Fan)
The PIC16C620AT-20/SO drives small brushed-DC motors and fan-speed controllers in 5V/12V embedded designs. The 16-bit Timer1 captures tachometer feedback from a Hall sensor or back-EMF, while the 8-bit Timer2 generates the PWM output that drives a MOSFET gate driver through one of the 13 I/O pins. The 5 MIPS instruction throughput maintains a tight PID loop at 1 kHz update rate without DSP overhead. The 3.0-5.5 V supply range works directly from a 5 V regulator, and the 18-pin SOIC keeps the board footprint under 10 mm wide.
تجویز کردہ
IR Remote Receiver Decoder
The PIC16C620AT-20/SO decodes consumer IR remote protocols (RC-5, NEC, Sony SIRC) for set-top boxes, AV receivers, and smart-home bridges. Its 16-bit Timer1 captures the 38 kHz carrier envelope measured by an external IR receiver module, and the 5 MIPS throughput handles bit-level decoding in real time without missing pulses. The 96 B RAM buffers the received frame for protocol-stack parsing, and the USART transmits decoded commands to the host CPU. The 13 I/O count accommodates IR input, status LED, learning-mode button, and UART output.
تجویز کردہ
Battery-Backed Sensor Interface
The PIC16C620AT-20/SO reads low-bandwidth analog sensors through an external ADC and forwards readings to a host via UART or I2C bit-banging, with sleep current under 1 uA for battery-backed sensor nodes. Its integrated watchdog timer with on-chip RC oscillator wakes the controller from sleep without external components, and the BOR circuit prevents corrupted EEPROM writes during battery brown-out. The 8-bit RISC core is more than sufficient for sensor linearization and threshold-alarm logic at 1 Hz sample rates, while OTP keeps unit cost minimal for disposable/wide-deploy sensor networks.
تجویز کردہ
Industrial 5V Logic Replacement
The PIC16C620AT-20/SO is a drop-in 5V-logic replacement for aging PIC16C5X designs in legacy industrial equipment where field-reprogramming is undesirable and OTP firmware is acceptable. Its instruction-set compatibility with the PIC16C5X family allows existing assembly code to be recompiled with minimal changes, and its 5.5 V absolute-maximum VDD tolerates industrial 5 V supply tolerance. The 18-pin SOIC footprint matches the previous-generation land pattern, so no PCB rework is required. The integrated watchdog timer with on-chip RC oscillator eliminates the external WDT supervisor that older PIC16C5X designs required.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا PIC16C620AT-20/SO — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | PIC16C620A-20/SO | PIC16C620-20/SO | PIC16C620A-04/SO | PIC16C620A-40/SO | PIC16C621AT-20I/SO |
|---|---|---|---|---|---|---|
| Package | 18-SOIC (SO) 0.295" / 7.50 mm | 18-SOIC (SO) - same | 18-SOIC (SO) - same | 18-SOIC (SO) - same | 18-SOIC (SO) - same | 18-SOIC (SO) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 4 MHz | 40 MHz | 20 MHz |
| Program Memory | 896 B OTP | 896 B OTP | 896 B OTP | 896 B OTP | 896 B OTP | 1 K OTP |
| RAM | 96 B | 96 B | 96 B | 96 B | 96 B | 128 B |
| I/O Pins | 13 | 13 | 13 | 13 | 13 | 13 |
| Operating Voltage | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V |
| Operating Temperature | 0 C to +70 C | 0 C to +70 C | 0 C to +70 C | 0 C to +70 C | 0 C to +70 C | -40 C to +85 C (industrial) |
| Special Features | WDT, BOR, ICSP, ICD | WDT, BOR, ICSP, ICD (identical) | WDT, BOR, ICSP (no ICD) | WDT, BOR, ICSP, ICD (identical) | WDT, BOR, ICSP, ICD (identical) | WDT, BOR, ICSP, ICD + analog comparator |
| Lifecycle | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
اہم امتیازی خصوصیات
- Drop-in same-die replacement via tube packaging variant (بمقابلہPIC16C620A-20/SO)
- Higher 40 MHz upgrade path in same 18-SOIC footprint (بمقابلہPIC16C620A-40/SO)
- Functional upgrade to PIC16C621A adds analog comparator and more memory (بمقابلہPIC16C621AT-20I/SO)
ڈیزائن نوٹس
Place a 100 nF decoupling capacitor (ceramic X7R) within 5 mm of the VDD pin (pin 14) and a second 10-100 uF bulk capacitor near the supply input. The PIC16C620AT-20/SO draws typically < 15 mA active at 20 MHz and 5 V, so a simple 78L05 or LDO is sufficient. The integrated brown-out-reset (BOR) circuit holds the CPU in reset when VDD falls below the programmable threshold; configure the BOR voltage in the configuration word to match your rail tolerance. Estimated power: P(active) ~= Vdd * I_dd ~= 5 V * 15 mA = 75 mW typical; P(sleep) < 5 uW at 3 V.
Route the crystal traces (OSC1/OSC2, pins 15-16) as short, symmetric loops and guard them with a ground pour to prevent crosstalk. Place the crystal within 5 mm of the MCU and keep clock traces away from switching signals and I/O edges. For EMI-sensitive applications, add a 4-resistor termination network on long signal runs. The MCLR pin (pin 4) must NOT be left floating - tie it to VDD through a 10 kohm resistor or drive it with the host controller. A 100 nF cap from MCLR to ground improves ESD immunity.
Three common pitfalls when designing with PIC16C620AT-20/SO: (1) PIC16C620A has NO on-chip ADC - if your design needs analog inputs, add an external MCP3002/MCP3202 SPI ADC or upgrade to PIC16C621A/PIC16C622A which adds analog comparators; (2) the OTP program memory can ONLY be programmed once - budget a second engineering sample run for firmware revisions; (3) PORTB internal weak pull-ups must be enabled in software (RBPU bit cleared) and only PORTB pins support them - PORTA pins float unless externally pulled. Also note that the 96-byte RAM is shared with the stack, so deep recursion will crash the controller.
The 18-pin SOIC package has a thermal resistance theta_JA of approximately 100 C/W (standard SOIC) and 80 C/W (exposed-pad variants, if applicable). At full-load operation (5 V, 20 MHz, all I/O switching), worst-case power dissipation is approximately 250 mW, giving a junction temperature rise of ~25 C above ambient. For commercial 0-70 C operation, derate above 45 C ambient if the device drives all 13 I/O pins at maximum source/sink current simultaneously. The integrated thermal shutdown does NOT exist on PIC16C620A - rely on the watchdog timer for fault recovery instead.
تعمیل کی معلومات
PIC16C620AT-20/SO is a legacy OTP-MCU that uses lead-based solder terminations per industry convention for the PIC16C family. New designs should use flash-based PIC16F630-I/SL family which is RoHS compliant. Per Microchip product environmental compliance, the PIC16C620A family is not RoHS compliant but is REACH SVHC compliant.
