PIC16C56A-04E/P - 1.5KB OTP 8-bit MCU, 4MHz, Ext Temp | Microchip
MPN: PIC16C56A-04E/P ✓ Hoạt độngPIC16C56A-04E/P Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM and peripheral I/O. The PIC16C5X series belongs to the original baseline PIC architecture using 12-bit wide instructions and a RISC instruction set of only 33 single-word, single-cycle opcodes. Within the broader taxonomy, this part is a 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. Its baseline RISC architecture makes it well suited to deterministic, low-cost control loops rather than to high-throughput digital signal processing.
Key features of the PIC16C56A-04E/P include 1.5KB OTP program memory (one-time field-programmable, ideal for mature/production code), 25 bytes of RAM, a 4MHz maximum operating frequency giving 1us instruction cycle, 12 bidirectional I/O pins, an 8-bit timer/counter (TMR0) with an 8-bit programmable prescaler, watchdog timer with on-chip RC oscillator, Power-on Reset, and brown-out detection. The device is built on a fully static CMOS process, allowing clock frequencies down to DC. Power-saving SLEEP mode and a wide 2.5V-5.5V operating range simplify battery and industrial 5V designs.
Typical applications include automotive body controllers, HVAC damper control, appliance front panels, simple sensor interfaces, white-goods motor control, security alarm keypads, and low-cost replacement of 555-timer-based discrete logic. The extended temperature grade (-40C to +125C) allows under-hood deployment.
When designing with this device, remember that OTP parts cannot be reprogrammed in-circuit; an EPROM windowed version (PIC16C56A-04/JW) is required for prototype development. For higher-volume or flash-based designs consider the pin-compatible PIC16F54 family.
Bộ thay thế dễ dàng lắp đặt cho PIC16C56A-04E/P — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC16C56A-04E/P (cùng hình factor và footprint) — khác nhau ở Package, Timers, Program Memory Size, Program Memory Type, Mounting Type.
PIC16C55A-04E/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C57C-04E/P
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C558-04E/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16F54-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C56A-04E/P Tỷ lệ tối đa & tính chất điện
| Family | PIC16C5X (PIC16C56A) |
| Core | 8-bit RISC (12-bit instructions, 33 opcodes) |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 1.5 KB (1K x 12) |
| RAM | 25 bytes |
| Maximum CPU Frequency | 4 MHz |
| Instruction Cycle | 1 us @ 4 MHz |
| I/O Pins | 12 |
| Timers | 1 x 8-bit (TMR0) with 8-bit programmable prescaler |
| Watchdog Timer | Yes (on-chip RC oscillator) |
| Brown-out Reset | Yes |
| Power-on Reset | Yes |
| Điện áp cung cấp | 2.5 V to 5.5 V |
| Nhiệt độ hoạt động | -40C to +125C (Extended, "E" grade) |
| Hộp | 18-pin PDIP (0.300", 7.62 mm) |
| Kiểu lắp đặt | Through-Hole |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16C56A-04E/P
| Chân 1 | RA2 — Bidirectional I/O, Port A bit 2 |
| Chân 2 | RA3 — Bidirectional I/O, Port A bit 3 |
| Chân 3 | RA4/T0CKI — Bidirectional I/O / Timer0 clock input |
| Chân 4 | MCLR/Vpp — Master Clear (Reset) / Programming voltage input |
| Chân 5 | VSS — Ground reference |
| Chân 6 | RB0/INT — Bidirectional I/O, Port B bit 0 / External interrupt |
| Chân 7 | RB1 — Bidirectional I/O, Port B bit 1 |
| Chân 8 | RB2 — Bidirectional I/O, Port B bit 2 |
| Chân 9 | RB3 — Bidirectional I/O, Port B bit 3 |
| Chân 10 | RB4 — Bidirectional I/O, Port B bit 4 |
| Chân 11 | RB5 — Bidirectional I/O, Port B bit 5 |
| Chân 12 | RB6 — Bidirectional I/O, Port B bit 6 |
| Chân 13 | RB7 — Bidirectional I/O, Port B bit 7 |
| Chân 14 | VDD — Positive supply (2.5V to 5.5V) |
| Chân 15 | OSC2/CLKOUT — Oscillator crystal output / Clock out (Fosc/4) |
| Chân 16 | OSC1/CLKIN — Oscillator crystal input / External clock input |
| Chân 17 | RA0 — Bidirectional I/O, Port A bit 0 |
| Chân 18 | RA1 — Bidirectional I/O, Port A bit 1 |
Ứng dụng tiêu biểu
PIC16C56A-04E/P phù hợp cho 6 Áp dụngs: Automotive Body Controller, Appliance Front-Panel Controller, Security Alarm Keypad, Low-Cost Sensor Interface, Replacement of 555-Timer Discrete Logic, Industrial Timer and Counter Modules.
Automotive Body Controller
The PIC16C56A-04E/P's -40C to +125C extended temperature grade and OTP memory make it a natural fit for automotive body electronics such as mirror adjusters, seat controllers and HVAC mode selectors. Its 12 bidirectional I/O pins directly drive relay coils, LED indicators and switch inputs while the on-chip 8-bit TMR0 with prescaler handles debounce and PWM for motor speed control. With 1.5KB of OTP code space, designers can comfortably implement state machines for position memory, soft-start routines and fault diagnostics. The brown-out reset and watchdog timer provide the resilience demanded by under-hood electrical environments with cranking transients and load-dump spikes. The 18-pin PDIP package supports through-hole assembly for serviceable modules.
Được đề xuất
Appliance Front-Panel Controller
In washing machines, microwave ovens and induction cooktops, the PIC16C56A-04E/P serves as the front-panel MCU scanning 4x3 key matrices, driving 7-segment LED displays and toggling triac outputs. The 12 I/O pins are sufficient for an 8-key matrix plus 4 digit/segment strobes, while the 1us instruction cycle at 4 MHz lets the chip execute full panel scans inside the human-perceptible debounce window. OTP memory guarantees the firmware cannot be field-tampered with, important for safety-certified white goods. The 25-byte RAM is adequate for digit buffers and last-key latches. Power-on reset and brown-out detection protect against brown-outs during compressor inrush.
Được đề xuất
Security Alarm Keypad
The PIC16C56A-04E/P powers traditional wired security keypads where 4x4 matrix scanning, LED annunciation and a piezo buzzer driver must run from a single 5V supply. Its low component count (no external oscillator beyond a 4 MHz resonator or internal RC) keeps the BOM under $2, critical for high-volume residential panels. The watchdog timer with on-chip RC oscillator prevents code lock-up if the supply is interrupted. SLEEP mode with the watchdog enabled keeps standby current under 10 uA, extending backup-battery runtime during AC outages. OTP firmware prevents unauthorized code extraction from stolen modules. Brown-out reset ensures clean recovery after deep battery discharge.
Được đề xuất
Low-Cost Sensor Interface
For thermistor-based temperature transmitters, optical encoders and simple pulse-counting flow meters, the PIC16C56A-04E/P offers enough MIPS to linearize sensors and drive a 4-20 mA loop or UART-style current loop. The 12 I/O pins handle multiple analog channels via a resistor mux to a single comparator, or count quadrature encoder pulses with TMR0. With 1.5KB of OTP, designers can implement lookup tables for NTC thermistor linearization, hysteresis filters and calibration constants. The wide 2.5V-5.5V supply range supports both 3.3V and 5V sensor rails. SLEEP mode plus watchdog wake-up extends battery life to several years on a single lithium cell.
Được đề xuất
Replacement of 555-Timer Discrete Logic
Many legacy products use 555-timer astables, CD4017 decade counters and discrete flip-flops to generate sequence logic. The PIC16C56A-04E/P can replace an entire board of glue logic with a single chip, reducing PCB area by 60-80% and BOM cost by 30-50%. Its 33-instruction RISC core easily handles monostable/astable equivalents, sequencers, and frequency dividers that previously required dozens of CMOS gates. The OTP memory lets designers commit custom timing diagrams, eliminating the need for trim pots. Brown-out reset and watchdog improve reliability over the discrete 555 circuits that often hang under transient supply noise.
Được đề xuất
Industrial Timer and Counter Modules
DIN-rail industrial timers, cycle counters and process-interval relays use the PIC16C56A-04E/P for time-base generation, button debouncing and relay output control. The TMR0 with 8-bit prescaler provides accurate 100 ms / 1 s / 1 min time bases from a 4 MHz resonator; combined with software counters, this implements timing ranges from milliseconds to hours. The 12 I/O pins drive up to 4 SPDT relays and read 4 user inputs. OTP memory ensures the timing parameters cannot drift in the field. The -40C to +125C extended temperature grade tolerates unheated control cabinets and outdoor enclosures. Brown-out reset prevents relay chattering during supply dips.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C56A-04E/P — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC16C55A-04E/P | PIC16C57C-04E/P | PIC16C558-04E/P | PIC16F54-I/P |
|---|---|---|---|---|---|
| Package | PDIP-18 (through-hole) | PDIP-18 - same | PDIP-18 - same | PDIP-18 - same | PDIP-18 - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 1.5 KB OTP | 0.75 KB OTP (-50%) | 3 KB OTP (+100%) | 2 KB OTP (+33%) | 0.75 KB Flash |
| RAM | 25 bytes | 25 bytes - same | 72 bytes (+188%) | 128 bytes (+412%) | 25 bytes - same |
| Maximum Clock | 4 MHz | 4 MHz - same | 4 MHz - same | 4 MHz - same | 20 MHz (+400%) |
| Memory Type | OTP (one-time) | OTP - same | OTP - same | OTP - same | Flash (reprogrammable) |
| I/O Pins | 12 | 12 - same | 20 (in PDIP-28 package) | 13 (+1) | 12 - same |
| Operating Temperature | -40C to +125C (Extended) | -40C to +125C - same | -40C to +125C - same | -40C to +125C - same | -40C to +85C (Industrial) |
| Supply Voltage | 2.5V to 5.5V | 2.5V to 5.5V - same | 2.5V to 5.5V - same | 2.5V to 5.5V - same | 2.0V to 5.5V |
Bảo phân biệt quan trọng
- Largest OTP program memory in PIC16C5X family at 1.5KB (vsPIC16C55A-04E/P)
- Automotive extended temperature grade (-40C to +125C) (vsPIC16F54-I/P)
- Single 8-bit timer vs PIC16C558's enhanced peripheral set (vsPIC16C558-04E/P)
Ghi chú thiết kế
Decouple VDD (pin 14) with a 100 nF ceramic capacitor placed within 5 mm of the pin, plus a 10 uF bulk capacitor if the supply is shared with relays or other switching loads. The PIC16C56A-04E/P draws about 2 mA at 4 MHz and 5 V; brown-out reset holds the part in reset if VDD drops below 2.5 V, so bulk capacitance is also useful for ride-through during brief supply dips.
Keep the 4 MHz crystal (or ceramic resonator) traces on pin 15 (OSC2) and pin 16 (OSC1) short (<10 mm) and surrounded by a ground pour to minimize EMI pickup. The MCLR/Vpp pin (4) requires a 10 kohm pull-up to VDD for normal operation; if in-circuit programming is needed, route MCLR to a dedicated ICSP header rather than a noisy reset source.
PIC16C56A-04E/P is OTP and CANNOT be reprogrammed. For prototype development, order the windowed ceramic PIC16C56A-04/JW (UV-erasable) or the flash-based PIC16F54-I/P to avoid scrapping boards. Also note that the baseline PIC16C5X architecture does NOT have an interrupt controller - the TMR0 overflow and external INT on RB0/INT must be polled; do not write code expecting vectored interrupts.
Thông tin tuân thủ
RoHS and lead-free per Microchip product page. AEC-Q100 not formally qualified but -40C to +125C extended grade makes it suitable for many non-safety-critical automotive body modules.
