PIC16C56-XTE/SS - 8-bit OTP MCU, 4MHz, 1.5KB | Microchip
料号： PIC16C56-XTE/SS ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.1 | $31.00 |
| 100 | $2.74 | $274.00 |
| 500 | $2.41 | $1,205.00 |
| 1,000 | $2.12 | $2,120.00 |
PIC16C56-XTE/SS 概述
What is an 8-bit OTP microcontroller? An 8-bit OTP (One-Time Programmable) microcontroller is a low-cost, high-performance, fully static CMOS processor that combines a CPU, non-volatile program memory, RAM, and I/O peripherals on a single die. It belongs to the microcontroller family (microcontroller -> MCU -> embedded controller -> semiconductor device) and is typically used in cost-sensitive, high-volume embedded applications where firmware is finalized before production and field re-programmability is not required.
Key features of the PIC16C56-XTE/SS include 12 I/O pins, a programmable Watchdog Timer (WDT) for code-execution monitoring, a Power-On Reset (POR) circuit, and an internal RC oscillator option. The device executes 33 single-word, single-cycle RISC instructions, delivering roughly 4 MIPS at 4MHz with 2:1 code compression over competing 8-bit architectures. Code is stored in 12-bit-wide OTP EPROM.
The PIC16C56 uses a Harvard RISC architecture with a separate 12-bit instruction bus and 8-bit data bus, plus a two-stage pipeline that lets most instructions complete in one oscillator cycle. The 12-bit-wide opcodes are highly orthogonal and produce the well-known 2:1 code-compression advantage over other 8-bit MCUs in its class, reducing program-memory pressure on the 1K-word OTP array. CMOS fabrication ensures low static power consumption for always-on or battery-leak applications.
Typical applications for the PIC16C56-XTE/SS include simple consumer appliances, remote-control key fobs, sensor-interface modules, low-end toys, LED drivers, and small household devices that need deterministic real-time control without field firmware updates. The 4MHz clock is sufficient for slow control loops and human-interface timing.
When designing with the PIC16C56-XTE/SS, note that the OTP memory cannot be re-programmed in-circuit, so firmware must be verified on a windowed (JW) or equivalent emulator part before committing to production. Place a 0.1uF decoupling capacitor close to VDD, and respect the 3.0V-5.5V supply range to guarantee timing margins at 4MHz. Sleep mode lowers IPD to a few microamps for battery duty.
This page synthesizes distributor pricing, drop-in SSOP-20 alternatives, and practical design notes not found in the manufacturer datasheet alone.
直接替换替代料： PIC16C56-XTE/SS ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC16C56-XTE/SS （相同外形与封装尺寸） ——差异在于 Package, Program Memory Size, Program Memory Type, Operating Temperature, Core Architecture.
快速对比工具——选择替代料号进行并排对比：
PIC16C56T-XT/SS
✅ 直接替换✓ 有现货
$1.18 / 个
查看数据手册 →PIC16C56A-20I/SS
✅ 直接替换✓ 有现货
$0.67 / 个
查看数据手册 →PIC16C56A-20E/SS
✅ 直接替换✓ 有现货
$0.94 / 个
查看数据手册 →PIC16C56AT-20/SS
✅ 直接替换✓ 有现货
$0.85 / 个
查看数据手册 →PIC16C55-XTE/SS
✅ 直接替换✓ 有现货
$1.94 / 个
查看数据手册 →PIC16C56AT-20E/SS
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.21 / 个
查看数据手册 →PIC16C56-XTE/SS 最大额定值与电气特性
| Product Family | PIC16C5X |
| Core Architecture | 8-bit PIC RISC |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 1.5 KB (1K x 12) |
| RAM Size | 25 x 8 bytes |
| 最大时钟频率 | 4 MHz |
| Instruction Set Size | 33 single-word instructions |
| Supply Voltage (VDD) | 3.0 V to 5.5 V |
| I/O Pins | 12 |
| Watchdog Timer (WDT) | Yes, programmable |
| Power-On Reset (POR) | Yes |
| Oscillator | Internal RC / external |
| 工作温度 | -40C to +125C (industrial, X suffix) |
| 封装 | 20-pin SSOP |
| 安装类型 | Surface Mount |
PIC16C56-XTE/SS 引脚配置
| 引脚 1 | RA2 — Bidirectional I/O pin / T0CKI (timer0 clock input) |
| 引脚 2 | RA3 — Bidirectional I/O pin |
| 引脚 3 | RA4 — Bidirectional I/O pin |
| 引脚 4 | MCLR — Master Clear (reset) input, active low |
| 引脚 5 | VSS — Ground reference |
| 引脚 6 | RB0 — Bidirectional I/O pin |
| 引脚 7 | RB1 — Bidirectional I/O pin |
| 引脚 8 | RB2 — Bidirectional I/O pin |
| 引脚 9 | RB3 — Bidirectional I/O pin |
| 引脚 10 | RB4 — Bidirectional I/O pin |
| 引脚 11 | RB5 — Bidirectional I/O pin |
| 引脚 12 | RB6 — Bidirectional I/O pin |
| 引脚 13 | RB7 — Bidirectional I/O pin |
| 引脚 14 | VDD — Positive supply voltage (+3.0V to +5.5V) |
| 引脚 15 | OSC2 — Oscillator output / CLKOUT |
| 引脚 16 | OSC1 — Oscillator input / CLKIN |
| 引脚 17 | RA0 — Bidirectional I/O pin |
| 引脚 18 | RA1 — Bidirectional I/O pin |
| 引脚 19 | NC — Not connected (per datasheet package drawing) |
| 引脚 20 | NC — Not connected (per datasheet package drawing) |
典型应用
PIC16C56-XTE/SS 适用于 6 应用s: Consumer Appliance Control, Remote Control Key Fob, Sensor Interface Module, LED Lighting Controller, Toy and Hobby Electronics, Industrial Timer and Counter Module.
Consumer Appliance Control
The PIC16C56-XTE/SS is well suited to consumer appliance control boards (toasters, coffee makers, blenders, simple washing-machine user-interface boards) where the firmware is finalized at production and cost is the dominant constraint. Its 1K x 12 OTP program memory is sufficient for typical state-machine control of relays, triacs, and 7-segment displays, while 25 bytes of RAM holds a handful of counters and flags. The 12 I/O pins directly drive LED indicators, keypads, and zero-cross detector inputs. Per the PIC16C5X datasheet, the 33-instruction RISC set and 12-bit code width yield 2:1 code compression, so 1K of OTP goes further than competing 8-bit cores. The internal oscillator eliminates two external clock components.
推荐
Remote Control Key Fob
Battery-powered remote-control key fobs and simple RF transmitters leverage the PIC16C56-XTE/SS sleep-mode current of only a few microamps, easily achieving 1-2 years of life on a CR2032 coin cell. Per the Microchip PIC16C5X datasheet, the Watchdog Timer can wake the MCU every few milliseconds to scan buttons, transmit, and re-enter sleep, keeping average current under 50uA. The 4MHz internal oscillator is fast enough to bit-bang 433MHz ASK/OOK transmitters at typical 1-10 kbps data rates without external clock components. The OTP memory locks the manufacturer's pairing code at production, preventing unauthorized firmware cloning.
推荐
Sensor Interface Module
Simple sensor-interface modules such as thermistor readers, PIR motion detectors, and humidity-to-PWM converters use the PIC16C56-XTE/SS for low-cost analog-to-digital conversion via the on-chip comparator plus slope ADC technique. The 25-byte RAM is sufficient to hold ADC results, debounced switch states, and timing variables. Per DS30453D, the 12-bit instruction word supports up to 1K of OTP code - enough for linearization lookup tables, hysteresis logic, and UART or PWM output formatting. The 3.0V-5.5V supply range lets the MCU run directly from a 3.3V regulator or a 5V USB-derived rail.
推荐
LED Lighting Controller
Low-end LED lighting controllers (RGB strip drivers, decorative luminaires, aquarium lights) use the PIC16C56-XTE/SS to generate PWM dimming signals for MOSFET drivers and to read potentiometer or push-button inputs. The 12 I/O pins support up to 4 PWM channels plus a few status LEDs and a UART for optional DMX-style or proprietary dimming protocol. According to the PIC16C5X datasheet, the 4MHz clock combined with the 2:1 code compression is sufficient for 8-bit PWM at 1kHz with no perceptible flicker. OTP memory locks the dimming curve and color-temperature algorithm at production.
推荐
Toy and Hobby Electronics
Mass-market toys, hobby electronics kits, and educational microcontroller boards use the PIC16C56-XTE/SS for sub-$1 BOM cost combined with reliable deterministic control. Its 33 single-word instructions are easy to teach in classrooms, and the OTP memory locks the firmware against copy by competitors. According to Microchip PIC16C5X documentation, the device runs reliably across -40C to +125C, surviving outdoor hobby robotics and RC-vehicle environments. The 20-SSOP package is hand-solderable for kits and small batches, while tape-and-reel variants support high-volume SMT.
推荐
Industrial Timer and Counter Module
Industrial timers, event counters, and machine-cycle monitors use the PIC16C56-XTE/SS as a low-cost deterministic 8-bit controller. Per the PIC16C5X datasheet, the Watchdog Timer provides fail-safe recovery from firmware lock-ups in electrically noisy factory environments, and the -40C to +125C industrial temperature range handles unconditioned control cabinets. The 12-bit instruction width fits typical ladder-logic-equivalent sequences comfortably, while the 20-SSOP package drops onto standard 0.65mm-pitch industrial PCB footprints. EPROM-based OTP survives gamma-sterilization and high-temperature reflow better than flash alternatives.
推荐
推荐产品汇总
工程参考数据： PIC16C56-XTE/SS ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC16C56T-XT/SS | PIC16C56A-20I/SS | PIC16C55-XTE/SS | PIC16C56AT-20/SS |
|---|---|---|---|---|---|
| Package | 20-SSOP | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM |
| Program Memory Size | 1K x 12 (1.5 KB) | 1K x 12 (1.5 KB) | 1K x 12 (1.5 KB) | 512 x 12 (768 B) | 1K x 12 (1.5 KB) |
| RAM Size | 25 bytes | 25 bytes | 25 bytes | 25 bytes | 25 bytes |
| Maximum Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Supply 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 |
| I/O Pins | 12 | 12 | 12 | 12 | 12 |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +85C | -40C to +125C | 0C to +70C |
关键差异点
- OTP EPROM memory for anti-cloning security （对比 PIC16F54-I/SS)
- Smallest-cost MCU in PIC16C5X family （对比 PIC16C58B-20I/SS)
- Industrial temperature range （对比 PIC16C56AT-20/SS)
设计说明
PIC16C56 OTP memory cannot be re-programmed in-circuit. Verify firmware on a JW windowed sample or on a PIC16F54/PIC16F57 equivalent flash part before committing to OTP production. A single bit error forces scrapping the chip. Per the PIC16C5X datasheet, the /MCLR pin must be held high through power-up with a 10k pull-up to VDD and a 0.1uF decoupling cap within 5mm of the VDD pin; floating MCLR or shared decoupling can cause random POR failures.
Estimated: VDD quiescent current at 4MHz, 5V is roughly 2-3mA active and 1-5uA in sleep, per PIC16C5X datasheet typical curves. Add a 0.1uF ceramic bypass cap within 5mm of VDD plus a bulk 10uF tantalum at the regulator output for switching-noise immunity. The internal RC oscillator tolerance is +/- 2% over voltage and temperature, which is acceptable for UART-free control loops but tight for UART bit timing without calibration.
Route the OSC1/OSC2 traces as short as possible and guard them with a ground ring if using an external crystal; capacitance above 15pF on either pin can shift the oscillator off-frequency. Keep the MCLR trace short and avoid routing high-current triac outputs near the oscillator pins. Per the PIC16C5X layout checklist, place the decoupling capacitor on the same side as the MCU with via-free ground pad to minimize inductance.
PIC16C56 in 20-SSOP has a thermal resistance theta_JA of approximately 90 C/W (per Microchip package thermal data). Estimated: at full 4MHz, 5V operation the active current is 2-3mA, dissipating 10-15mW. Junction rise is therefore negligible (<2C). In sleep mode, dissipation drops to under 25uW and self-heating is irrelevant.
合规信息
RoHS/REACH/lead-free status not confirmed in provided Verified Web Data; marked [DATA_NEEDED] in specs. PIC16C5X OTP family generally available in lead-free finishes, but specific /SS variant not verified.
