PIC16C56AT-20/SO - 8-bit OTP MCU 1.5KB ROM 20MHz SOIC-18
MPN: PIC16C56AT-20/SO ✗ Cuối đờiPIC16C56AT-20/SO Tóm tắt
Background Knowledge: An 8-bit OTP microcontroller is a single-chip computer built around an 8-bit data path and one-time-programmable (OTP) EPROM or ROM program memory. The PIC16C5X family uses a 12-bit wide instruction word with a Harvard architecture, separating program and data memory for deterministic single-cycle instruction execution. As a member of the broader microcontroller class (microcontroller -> MCU -> embedded controller -> semiconductor), the PIC16C56A belongs to the RISC subset, executes one instruction per instruction cycle (four clock periods), and is offered in masked-ROM (PIC16C56), UV-erasable windowed (PIC16C56 JW), and one-time-programmable EPROM (PIC16C56A) variants, with the "T" suffix denoting the tape-and-reel packaging option.
Key features include 12 I/O pins, 20 MHz maximum oscillator input, a 33-instruction RISC instruction set, on-chip power-on reset, watchdog timer with its own on-chip RC oscillator, internal MCLR reset input, programmable code protection, power-saving SLEEP mode, and selectable oscillator configurations (RC, LP, XT, HS, external clock). The 20 in the part number suffix designates the 20 MHz speed grade, the T denotes tape-and-reel, and /SO denotes the SOIC-18 wide-body small-outline package.
Typical applications span consumer appliances, automotive subsystems (non-safety), industrial control nodes, sensor interfaces, and low-cost battery-powered devices that benefit from deterministic single-cycle RISC execution and a mature toolchain based on MPLAB IDE and the MP3/MPLAB PM3 device programmer.
When designing with the PIC16C56AT-20/SO, ensure the Vdd decoupling network (typically 0.1 µF ceramic in parallel with a bulk tantalum/electrolytic cap) is placed within 10 mm of the supply pin, and respect the maximum I/O sink/source ratings per pin and per port.
Bộ thay thế dễ dàng lắp đặt cho PIC16C56AT-20/SO — 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 PIC16C56AT-20/SO (cùng hình factor và footprint) — khác nhau ở Package, Timers, Mounting Type, Program Memory Type, Watchdog Timer.
PIC16C56AT-04E/SO
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C56A-20I/SS
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C56A-20E/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C56A-04E/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C55AT-20/SO
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C56AT-20/SO Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit RISC, Harvard |
| Family | PIC16C5X (PIC16C56A sub-family) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 1.5 KB (1K x 12) |
| Data RAM | 25 bytes |
| Tần số xung maksimum | 20 MHz |
| Instruction Set Size | 33 instructions |
| Instruction Width | 12 bits |
| I/O Pins | 12 |
| Timers | 1 x 8-bit (TMR0) with watchdog |
| Interrupts | External edge-selectable (PIC16C56A sub-family) |
| Watchdog Timer | Yes, with dedicated on-chip RC oscillator |
| Power-on Reset | Yes, on-chip |
| Power-Saving Mode | SLEEP |
| Code Protection | Programmable, on-chip |
| Oscillator Modes | RC, LP, XT, HS, External Clock |
| Temperature Grade | Commercial |
| Hộp | 18-lead SOIC ("SO"), gull-wing |
| Kiểu lắp đặt | Surface Mount |
| Lead Form | Gull Wing |
Cấu hình chân PIC16C56AT-20/SO
| Chân 1 | RA2/AN2 — Bidirectional I/O / analog channel (PIC16C56A) |
| Chân 2 | RA3/AN3 — Bidirectional I/O / analog channel (PIC16C56A) |
| Chân 3 | T0CKI — Timer0 external clock input |
| Chân 4 | MCLR/Vpp — Master clear reset (active low) / programming voltage input |
| Chân 5 | Vss — Ground reference |
| Chân 6 | RB0/INT — Bidirectional I/O / external interrupt input |
| Chân 7 | RB1 — Bidirectional I/O |
| Chân 8 | RB2 — Bidirectional I/O |
| Chân 9 | RB3 — Bidirectional I/O |
| Chân 10 | RB4 — Bidirectional I/O |
| Chân 11 | RB5 — Bidirectional I/O |
| Chân 12 | RB6 — Bidirectional I/O |
| Chân 13 | RB7 — Bidirectional I/O |
| Chân 14 | OSC2/CLKO — Oscillator crystal output / clock output |
| Chân 15 | OSC1/CLKI — Oscillator crystal input / external clock input |
| Chân 16 | RC0 — Bidirectional I/O (PIC16C56A additional port) |
| Chân 17 | RC1 — Bidirectional I/O (PIC16C56A additional port) |
| Chân 18 | Vdd — Positive supply voltage |
Ứng dụng tiêu biểu
PIC16C56AT-20/SO phù hợp cho 6 Áp dụngs: Consumer Appliance Control, Automotive Body Electronics (Non-Safety), Industrial Sensor Interface Module, Remote Control and Toy Electronics, LED Lighting Controllers, Battery-Powered Sensor Nodes.
Consumer Appliance Control
The PIC16C56AT-20/SO is well suited to consumer appliance control boards - washing machines, microwave ovens, coffee makers, dishwashers - where deterministic single-cycle RISC execution, 12 I/O pins, and a 20 MHz instruction throughput of 5 MIPS provide ample headroom for keypad scanning, relay drivers, and simple user-interface state machines. The 1.5 KB OTP program memory accommodates typical appliance firmware (mode selection, timing, fault handling) without external memory, and the on-chip watchdog timer plus power-on reset simplify fail-safe design for unattended equipment. The SOIC-18 surface-mount package supports automated pick-and-place assembly at the volumes typical of white-goods manufacturing.
Được đề xuất
Automotive Body Electronics (Non-Safety)
In automotive body electronics applications such as interior lighting controllers, mirror-adjust modules, seat-position memory, and simple body-control nodes, the PIC16C56AT-20/SO delivers 12 I/O lines and 5 MIPS throughput suitable for low-rate CAN/LIN companion tasks when paired with a dedicated transceiver. The 20 MHz oscillator and edge-selectable external interrupts (a PIC16C56A feature) support precise debouncing of mechanical switch inputs. Note that this part is commercial-temperature-grade and is not qualified to AEC-Q100; for safety-relevant or under-hood modules select a PIC16F1XXX or PIC18 K-series AEC-Q100-qualified MCU instead.
Được đề xuất
Industrial Sensor Interface Module
For industrial sensor-interface modules - simple 4-20 mA loop conditioners, digital thermocouple readers, limit-switch multiplexers, and panel-meter driver boards - the PIC16C56AT-20/SO provides 12 GPIO for matrix keypad or LED segment driving, a hardware watchdog for unattended operation, and a 33-instruction RISC set that compiles small and deterministic code. The 1.5 KB OTP holds linearization tables and modest protocol stacks. Industrial users should note the commercial temperature grade; for -40 to +85C environments the PIC16C56AT-20I/SO industrial variant is required.
Được đề xuất
Remote Control and Toy Electronics
Low-cost remote controls, RC toys, and hobbyist electronics benefit from the PIC16C56AT-20/SO's small SOIC-18 footprint, 12 I/O for matrix keypads or LED indicators, and 20 MHz throughput for IR carrier generation and simple PWM motor control. The on-chip watchdog and SLEEP mode extend battery life in handheld devices, while OTP program memory keeps unit cost low for high-volume consumer goods. Designers can move to the flash-based PIC16F54 for prototype reuse without changing the PCB layout.
Được đề xuất
LED Lighting Controllers
Addressable LED strip controllers, decorative lighting drivers, and DMX-512 node electronics can use the PIC16C56AT-20/SO as a low-cost sequencing engine. The 5 MIPS instruction throughput is more than adequate for WS2812/NeoPixel bit-banging at 800 kHz, and the 12 I/O accommodate a small DIP-switch address selector plus the LED data line. The on-chip watchdog timer is useful for unattended decorative installations. The SOIC-18 package simplifies integration into the small PCBs typical of LED fixtures.
Được đề xuất
Battery-Powered Sensor Nodes
For battery-powered sensor nodes such as simple wireless push-buttons, thermostats, and environmental loggers, the PIC16C56AT-20/SO offers a hardware SLEEP mode and on-chip watchdog timer that together minimize quiescent current between samples. The 12 I/O connect to low-power sensors and an RF transmitter such as a sub-GHz OOK module. The 20 MHz oscillator can be swapped for the LP oscillator mode at 32.768 kHz for ultra-low-power timekeeping, and 1.5 KB OTP is sufficient for small sensor-fusion and duty-cycle control firmware.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C56AT-20/SO — 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 | PIC16C56AT-04E/SO | PIC16C55AT-20/SO | PIC16C56A-20I/SS | PIC16C56A-20E/P |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-18 (/SO) | SOIC-18 - same | SOIC-18 - same | SSOP-20 (different footprint) | PDIP-18 (through-hole, different footprint) |
| Core / Family | PIC16C56A (8-bit RISC, PIC16C5X) | PIC16C56A (same) | PIC16C55A (sister family) | PIC16C56A (same) | PIC16C56A (same) |
| Program Memory | 1.5 KB OTP (1K x 12) | 1.5 KB OTP (same) | 1.5 KB OTP (same) | 1.5 KB OTP (same) | 1.5 KB OTP (same) |
| Data RAM | 25 bytes | 25 bytes | 25 bytes | 25 bytes | 25 bytes |
| Maximum Clock Frequency | 20 MHz | 4 MHz (-04 speed grade) | 20 MHz | 20 MHz | 20 MHz |
| I/O Pins | 12 | 12 | 13 | 13 | 13 |
| On-chip Analog Comparator | No | No | Yes | No | No |
| Temperature Grade | Commercial | Extended (-40 to +125 C) | Commercial | Industrial (-40 to +85 C) | Extended (-40 to +125 C) |
Bảo phân biệt quan trọng
- SOIC-18 surface-mount variant of the PIC16C56A sub-family (vsPIC16C56A-20E/P (PDIP-18))
- Edge-selectable external interrupt and additional 8-bit I/O port (vsPIC16C56 (legacy))
- 20 MHz speed grade for 5 MIPS instruction throughput (vsPIC16C56AT-04E/SO (4 MHz speed grade))
Ghi chú thiết kế
Estimated: place a 0.1 uF ceramic decoupling capacitor within 5-10 mm of the Vdd pin (pin 18) and a bulk capacitor of 1-10 uF (tantalum or electrolytic) on the same supply rail. The PIC16C56AT-20/SO draws a few mA active and a few uA in SLEEP mode, so the bulk capacitor must sustain Vdd through any expected SLEEP duty cycle. Tie MCLR (pin 4) to Vdd through a 10 kohm pull-up; if external reset is not used, leave the MCLR pin connected to Vdd directly. Add a small-signal diode from MCLR to Vdd if inductive kickback is possible on the reset line.
Estimated: keep oscillator traces short and surround them with a grounded copper pour. Crystal or ceramic resonator loading capacitors (typically 15-33 pF) must be placed within a few millimeters of OSC1 (pin 15) and OSC2 (pin 14). For high-noise environments, place the device away from switching power and signal lines, and add a ground guard ring around the oscillator section. The SOIC-18 footprint leaves adequate room for via-in-pad stitching to the inner ground plane; populate at least two ground stitches directly under the SOIC paddle area for thermal relief.
Estimated: do not program the PIC16C56AT-20/SO with PIC16C56 firmware without verifying the I/O port and interrupt mapping; the PIC16C56A sub-family adds an extra 8-bit I/O port (RC) and edge-selectable interrupts that the legacy PIC16C56 lacks. The OTP device cannot be erased by UV light, so firmware development must use a windowed (JW) package or a flash-based PIC16F54/55 development board. Confirm the toolchain you plan to use supports the PIC16C56A silicon revision; older MPASM / MPLAB IDE 8.x project files may need updating to the latest MPLAB X IDE for current toolchain support.
Estimated: SOIC-18 packages have a typical theta_JA of approximately 70-90 C/W on a standard 4-layer JEDEC test board. At the modest 5 V supply and 20 MHz clock typical for PIC16C56AT-20/SO designs, total device dissipation is well under 100 mW, so the junction temperature rise above ambient is negligible (<10 C) and no heatsink is required. Industrial users should still verify that operating ambient plus worst-case self-heating remains inside the commercial (0-70 C) or industrial (-40 to +85 C) limit of the chosen speed grade.
Thông tin tuân thủ
RoHS, REACH, lead-free, halogen-free, and conflict-minerals status for PIC16C56AT-20/SO were not present in the verified web data; treat each as 'unknown' until confirmed with the manufacturer or distributor. The part is not AEC-Q100 qualified; for safety-relevant automotive designs select an AEC-Q100-qualified PIC16F or PIC18 K-series MCU instead.
