PIC16C57-LPI/P - 8-bit OTP MCU, 3KB, 20 I/O, PDIP-28 | Microchip
部品番号: PIC16C57-LPI/P ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $3.25 | $3.25 |
| 10 | $2.95 | $29.50 |
| 100 | $2.55 | $255.00 |
| 500 | $2.2 | $1,100.00 |
| 1,000 | $1.95 | $1,950.00 |
PIC16C57-LPI/P 概要
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and I/O peripherals on one silicon die. The PIC16C5X family uses a 12-bit-wide instruction word with an 8-bit data path - this RISC architecture executes most instructions in a single clock cycle, enabling deterministic timing for control applications. The PIC16C57 belongs to the baseline PIC architecture, the original Microchip core that pre-dates the PIC16F mid-range family and is purpose-built for low-cost, high-volume embedded control tasks where code is committed once at production.
Key features of the PIC16C57-LPI/P include seven or eight special function hardware registers, a two-level deep hardware stack, direct, indirect and relative addressing modes for both data and instructions, and an 8-bit real-time clock/counter (TMR0) with an 8-bit programmable prescaler. The device supports internal and external interrupt sources, a watchdog timer for code-flow safety, and a power-on reset (POR) block. Power-saving SLEEP mode is entered via software and wakes on interrupt or watchdog timeout, which is critical for battery-powered or energy-harvesting nodes.
The PIC16C57 is fabricated in a CMOS process that yields fully static operation across the full supply range, allowing the clock to be stopped without losing register state. The 12-bit instruction set (33 single-word instructions) is optimized for bit-level manipulation and compact code density, while the 20 I/O pins each have independent direction control and can source/sink sufficient current to drive LEDs directly without external buffers. The integrated watchdog and POR reduce external component count, lowering BOM cost in production designs.
Typical applications include appliance control (washers, microwave ovens, coffee makers), HVAC thermostats and zone controllers, automotive interior modules (non-safety), security-system keypads, remote transmitters, low-end consumer toys, metering and data-logger front-ends, and any high-volume, cost-sensitive embedded product where OTP memory is acceptable. The industrial temperature grade (-40C to +85C) makes it suitable for outdoor enclosures and uncontrolled environments.
When designing with the PIC16C57-LPI/P, note that the LP oscillator requires an external crystal or resonator, and decoupling capacitors must be placed close to VDD/VSS pins to ensure stable operation. The 2-level hardware stack constrains call depth; subroutines must be kept shallow or inlined to avoid stack overflow. Designers familiar with mid-range PIC16F parts should verify interrupt and register-mapping differences against the baseline PIC16C5X reference manual.
This page synthesizes pricing tiers, drop-in PIC16C5X alternatives, and practical design notes that complement the manufacturer datasheet and distributor listings.
ドロップイン代替品: PIC16C57-LPI/P — 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: PIC16C57-LPI/P （同一形状・フットプリント） — 相違点: Package, Program Memory Size, Timers, Watchdog Timer, Maximum Clock Frequency.
クイック比較ツール — 並列比較する代替部品を選択:
PIC16C57-LPE/P
✅ ドロップイン✓ 在庫あり
$2.7 / 個
データシートを見る →PIC16C57-LP/P
✅ ドロップイン✓ 在庫あり
$1.74 / 個
データシートを見る →PIC16C57-HSI/P
✅ ドロップイン✓ 在庫あり
$1.89 / 個
データシートを見る →PIC16C57-HS/P
✅ ドロップイン✓ 在庫あり
$4.62 / 個
データシートを見る →PIC16C57C-40/P
✅ ドロップイン✓ 在庫あり
$3.82 / 個
データシートを見る →PIC16C57-10I/P
✅ ドロップイン✓ 在庫あり
$1.75 / 個
データシートを見る →PIC16C57-LPI/P 最大定格＆電気的特性
| Core | PIC baseline 8-bit RISC |
| Instruction Word Width | 12-bit |
| Data Path Width | 8-bit |
| Program Memory Size | 3 KB (2K x 12) OTP EPROM |
| RAM Size | 72 bytes |
| I/O Pins | 20 |
| Number of Instructions | 33 single-word |
| Hardware Stack Depth | 2 levels |
| Timers | 1 x 8-bit TMR0 with 8-bit programmable prescaler |
| Oscillator Type | External LP (Low-Power), 0 to 200 kHz crystal/resonator |
| 最大クロック周波数 | 40 kHz (LP variant) |
| Supply Voltage (VDD) | 3.0 V to 6.0 V (5 V typical) |
| 動作温度 | -40 C to +85 C (industrial) |
| パッケージ | PDIP-28 (0.600 inch / 15.24 mm) |
| 実装タイプ | Through-Hole (DIP) |
| Watchdog Timer | Yes (on-chip WDT with dedicated RC oscillator) |
| Power-On Reset (POR) | Yes |
| Power-Saving Mode | SLEEP mode (wake via interrupt or WDT) |
PIC16C57-LPI/P ピン構成
| ピン 1 | RA2 — Port A bit 2 (digital I/O, also T0CKI clock input) |
| ピン 2 | RA3 — Port A bit 3 (digital I/O) |
| ピン 3 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| ピン 4 | MCLR — Master Clear (reset, active low) |
| ピン 5 | VSS — Ground reference |
| ピン 6 | RB0 — Port B bit 0 (digital I/O, interrupt-on-change capable) |
| ピン 7 | RB1 — Port B bit 1 (digital I/O, interrupt-on-change capable) |
| ピン 8 | RB2 — Port B bit 2 (digital I/O, interrupt-on-change capable) |
| ピン 9 | RB3 — Port B bit 3 (digital I/O, interrupt-on-change capable) |
| ピン 10 | RB4 — Port B bit 4 (digital I/O, interrupt-on-change capable) |
| ピン 11 | RB5 — Port B bit 5 (digital I/O, interrupt-on-change capable) |
| ピン 12 | RB6 — Port B bit 6 (digital I/O, interrupt-on-change capable) |
| ピン 13 | RB7 — Port B bit 7 (digital I/O, interrupt-on-change capable) |
| 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 (crystal mode) |
| ピン 17 | RC0 — Port C bit 0 (digital I/O) |
| ピン 18 | RC1 — Port C bit 1 (digital I/O) |
| ピン 19 | RC2 — Port C bit 2 (digital I/O) |
| ピン 20 | RC3 — Port C bit 3 (digital I/O) |
| ピン 21 | RC4 — Port C bit 4 (digital I/O) |
| ピン 22 | RC5 — Port C bit 5 (digital I/O) |
| ピン 23 | RC6 — Port C bit 6 (digital I/O) |
| ピン 24 | RC7 — Port C bit 7 (digital I/O) |
| ピン 25 | VSS — Ground reference |
| ピン 26 | VDD — Positive supply voltage (3.0-6.0 V) |
| ピン 27 | RA0 — Port A bit 0 (digital I/O) |
| ピン 28 | RA1 — Port A bit 1 (digital I/O) |
主な用途
PIC16C57-LPI/P の用途: 6 件s: Appliance Control (Washing Machines, Microwaves), HVAC Thermostats and Zone Controllers, Security System Keypads and Access Panels, Remote Control Transmitters, Automotive Interior Modules (Non-Safety), Consumer Toys and Educational Devices.
Appliance Control (Washing Machines, Microwaves)
The PIC16C57-LPI/P is widely deployed in major home appliances including washing machines, microwave ovens, dishwashers, and coffee makers because its 3 KB OTP program memory is sufficient to encode mode-selection state machines, timing loops, and sensor-driven control logic, while the 20 I/O pins interface directly with membrane keypads, LED indicators, seven-segment displays, and triac-driven motor/valve actuators. The LP oscillator variant is preferred for these mains-attached but always-on appliances because it minimizes standby power and extends energy-star compliance margins. Industrial temperature grade (-40 C to +85 C) tolerates the heat of a dryer cabinet or the cold of an unheated garage laundry room. The on-chip watchdog timer and power-on reset prevent lockup in noisy motor environments, and the 2-level hardware stack is sufficient for the flat, non-recursive firmware structure typical of appliance controllers.
おすすめ
HVAC Thermostats and Zone Controllers
HVAC thermostat and zoning-controller designs benefit from the PIC16C57-LPI/P's LP low-power characteristics (microamp-level active current at 32 kHz), enabling battery-backed or energy-harvesting wireless thermostats. The 8-bit TMR0 with 8-bit programmable prescaler handles RTC tick generation for scheduling and setpoint timing, while the 20 I/O pins scan temperature sensors, drive LCD segments, and switch HVAC contactors via optoisolators. The 3 KB OTP program memory fits typical thermostat firmware including PID loops, schedule tables, and display routines. SLEEP mode with watchdog wake keeps idle current below typical self-discharge rates of coin-cell batteries, supporting multi-year field deployment. The PDIP-28 through-hole package simplifies hand-soldered thermostat-prototype assembly and field service replacement.
おすすめ
Security System Keypads and Access Panels
Security keypads, access control panels, and alarm-system annunciators use the PIC16C57-LPI/P to scan 4x4 or 3x4 matrix keypads via the 20 available I/O pins, drive piezo buzzers and status LEDs, and communicate with central panels via simple serial or relay-isolated links. The 72-byte RAM is enough to buffer PIN-entry debouncing state and last-code memory, while the 3 KB OTP memory holds encryption-light authentication routines and event-logging code. The on-chip watchdog timer recovers from keypad ESD events or brown-out conditions, and the power-on reset ensures deterministic startup on power restore after outage. The industrial temperature rating supports outdoor keypad installations and unheated vestibules.
おすすめ
Remote Control Transmitters
Low-end remote controls for fans, lighting dimmers, garage-door openers, and consumer toys use the PIC16C57-LPI/P because its LP oscillator variant at 32 kHz to 200 kHz draws microamp-level current from coin-cell or AAA batteries, extending battery life beyond typical user expectations. The 20 I/O pins drive IR LEDs, RF encoder ICs, or direct-key scan matrices, and the SLEEP mode with watchdog or external-interrupt wake keeps idle current below the battery self-discharge rate. The 3 KB OTP memory encodes IR protocols (RC5, NEC, Sony SIRC) or simple fixed-code RF transmission patterns, while the small 28-pin PDIP package keeps the PCB compact and assembly low-cost. Programming cost is amortized across high-volume consumer production runs.
おすすめ
Automotive Interior Modules (Non-Safety)
Non-safety automotive interior modules such as climate-control panel switches, seat-position memories, mirror-adjust controllers, sunroof switches, and ambient lighting strips use the PIC16C57-LPI/P because its industrial temperature grade handles cabin-temperature extremes (-40 C to +85 C) and its 20 I/O pins interface directly with switches, rotary encoders, LED drivers, and small DC motors. The 3 KB OTP memory encodes debounce, position memory, and PWM-style intensity algorithms, while the LP oscillator variant minimizes quiescent current when the vehicle is parked. Automotive-grade parts in this family are also available, but the standard PIC16C57-LPI/P suffices for non-safety modules that still need robust EMI tolerance and ESD survivability.
おすすめ
Consumer Toys and Educational Devices
Cost-sensitive consumer toys, electronic learning aids, and novelty gadgets use the PIC16C57-LPI/P because the baseline PIC architecture delivers reliable single-cycle RISC execution with only 33 instructions, keeping firmware development costs low and time-to-market fast. The 3 KB OTP memory is sufficient for sound-effect playback (via PWM tone generation), motor sequencing, LED chaser patterns, and basic user interaction. The 20 I/O pins drive small DC motors, buzzers, RGB LEDs, and capacitive or resistive touch inputs. The PDIP-28 through-hole package simplifies factory assembly with wave soldering, reducing per-unit production cost for high-volume toy SKUs. SLEEP mode powered by 2xAA cells supports the multi-month shelf-life typical of retail toy products.
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: PIC16C57-LPI/P — 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 | PIC16C57-LPE/P | PIC16C57-LP/P | PIC16C57-HSI/P | PIC16C57C-40/P | PIC16C57-10I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | PDIP-28 (0.600 in / 15.24 mm) | PDIP-28 - same | PDIP-28 - same | PDIP-28 - same | PDIP-28 - same | PDIP-28 - same |
| Program Memory | 3 KB (2K x 12) OTP EPROM | 3 KB OTP EPROM | 3 KB OTP EPROM | 3 KB OTP EPROM | 3 KB OTP EPROM | 3 KB OTP EPROM |
| RAM | 72 bytes | 72 bytes | 72 bytes | 72 bytes | 72 bytes | 72 bytes |
| Max Clock Frequency | 40 kHz (LP oscillator) | 40 kHz (LP) | 40 kHz (LP) | 20 MHz (HS, +500x faster) | 40 MHz (HS) | 10 MHz (HS) |
| Oscillator Type | External LP (low-power) | External LP | External LP | External HS | External HS/RC | External HS |
| Operating Temperature | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | 0 C to +70 C (commercial) | -40 C to +85 C (industrial) | 0 C to +70 C (commercial) | -40 C to +85 C (industrial) |
| I/O Pins | 20 | 20 | 20 | 20 | 20 | 20 |
| Supply Voltage | 3.0 V to 6.0 V | 3.0 V to 6.0 V | 3.0 V to 6.0 V | 3.0 V to 6.0 V | 3.0 V to 6.0 V | 3.0 V to 6.0 V |
主な差別化要因
- LP low-power oscillator variant with industrial temperature grade （vs PIC16C57-HSI/P)
- Industrial -40 C to +85 C temperature range for outdoor and harsh-environment use （vs PIC16C57-LP/P)
- Same 28-pin PDIP footprint as the entire PIC16C5X family （vs PIC16C57-HSI/P)
設計ノート
Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 26), with a bulk 10 uF tantalum or aluminum electrolytic capacitor at the PCB power-entry point. For battery-powered designs, add a 100 kohm pull-up on MCLR (pin 4) to prevent spurious resets during VDD ramp. The PIC16C57-LPI/P LP oscillator variant draws microamp-level active current at 32 kHz, but a poorly regulated VDD can cause 5-10x current spikes during oscillator startup, so verify regulator load-transient response for coin-cell designs.
Route the OSC1/OSC2 crystal traces short and symmetric, with the crystal placed within 5 mm of the IC and a ground guard ring around the oscillator cell to reduce EMI pickup. For the LP oscillator variant at 32 kHz, the load capacitor values typically fall in the 15-33 pF range - consult the crystal manufacturer's CL specification and use the standard formula C1=C2=2*(CL - Cstray) where Cstray is 5-10 pF of parasitic capacitance. Keep digital signal traces (especially RB port interrupt lines) away from the oscillator traces to avoid coupling.
Do not exceed the 2-level hardware stack depth - PIC16C57 has only TWO stack levels for subroutine calls, so deeply nested call chains will corrupt the program counter. Plan firmware as flat as possible, inlining subroutines or using iterative loops instead of recursion. Also note that the PIC16C5X baseline architecture has NO interrupt priority and NO context-saving hardware, so ISR code must manually save/restore W and STATUS registers. Designers migrating from PIC16F mid-range parts often miss this and write code that fails on PIC16C57.
The PIC16C57-LPI/P RB port pins (RB0-RB7, pins 6-13) feature interrupt-on-change wake from SLEEP, but they are sensitive to noise - add 10-100 kohm pull-ups and 100 nF filter capacitors on lines entering ESD-prone connectors. For triac-driven AC loads driven via RB pins, ensure zero-crossing detection uses hardware-isolated optocouplers (e.g., MOC3021) rather than direct mains coupling to the MCU - line transients can destroy the PIC16C57's I/O cells. Add TVS diodes (e.g., P6KE series) across AC-side connectors for surge protection.
コンプライアンス情報
Lead-free and Pb-free terminal finish per Microchip product page. RoHS and REACH compliance status not explicitly stated in the verified web data - marked as 'unknown' pending manufacturer declaration. AEC-Q100 not applicable (industrial-grade part, not automotive-qualified per PIC16C5X family documentation). The PIC16C57-LPI/P is not pin-compatible with automotive-qualified PIC16C5X variants such as PIC16C57-LPE/P automotive-grade versions.
