PIC16C57-XTI/P - 8-Bit 4MHz 3KB OTP MCU 28-PDIP | Microchip
부품 번호: PIC16C57-XTI/P ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $8.62 | $8.62 |
| 10 | $7.75 | $77.50 |
| 100 | $6.8 | $680.00 |
| 500 | $6.1 | $3,050.00 |
| 1,000 | $5.55 | $5,550.00 |
PIC16C57-XTI/P 개요
An 8-bit microcontroller (MCU) is a single-chip computer containing a CPU, program memory, data RAM, and peripheral interfaces on one die. Within the broader taxonomy, the PIC16C57 belongs to the 8-bit MCU hypernym -> microcontroller family -> embedded IC -> semiconductor. The 'C' suffix indicates CMOS EPROM/OTP program memory (versus 'F' for Flash and 'CR' for ROM), and the PIC16C5X series is one of Microchip's foundational mid-range architectures predating the later PIC16F and PIC18 families. OTP memory is programmed once and is non-erasable, which makes the part cost-effective for high-volume production but unsuitable for firmware revision.
Key features of the PIC16C57-XTI/P include 12-bit instruction width, 33 single-cycle instructions (excluding branches), two 8-bit timer/counters (TMR0 with 8-bit programmable prescaler, TMR1), a watchdog timer with on-chip RC oscillator, and a power-on reset (POR) circuit. The device operates over a 2.5V to 6.25V VDD range and consumes very low operating current thanks to its CMOS design. The -XTI suffix designates a 4 MHz crystal/oscillator industrial-temperature-grade variant in PDIP packaging.
Architecturally, the PIC16C57 uses a 2-stage pipeline with an 8-bit data path and a separate 12-bit program path (Harvard architecture). Its 8-level deep hardware stack limits subroutine nesting to 8 levels, which constrains complex C compilers but suits compact assembly-level firmware. The device has four interrupt sources with a fixed interrupt vector and supports direct, indirect, and relative addressing modes.
Typical applications include consumer appliance controls, automotive body electronics (non-safety), industrial sensor front-ends, low-cost remote controls, and battery-powered metering. The 20 available I/O pins make it well-suited to small user-interface boards and LED/keypad scan matrices. Because the PIC16C57 is mature and well-documented, it remains popular in maintenance-of-existing-design and legacy industrial equipment scenarios.
When designing with the PIC16C57-XTI/P, engineers should use the MPLAB PM3 Universal Device Programmer (or a compatible gang programmer) and the MPLAB IDE v8.x or earlier for assembly development. Designers must budget the 8-level hardware stack carefully and avoid C compilers that require deep call nesting. For new designs, the PIC16F57 or PIC16F57 Flash variant offers in-circuit reprogrammability with pin-compatible migration paths.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on a single manufacturer or distributor datasheet page.
드롭인 대체품: PIC16C57-XTI/P — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: PIC16C57-XTI/P (동일 폼 팩터 및 풋프린트) — 차이점: Package, Operating Temperature, Program Memory Size, Program Memory Type, Timers.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
PIC16F57-I/P
✅ 드롭인✓ 재고 있음
$1.18 / 개
데이터시트 보기 →PIC16C57-XT/P
✅ 드롭인✓ 재고 있음
$2.95 / 개
데이터시트 보기 →PIC16C57C-20I/P
✅ 드롭인✓ 재고 있음
$2.18 / 개
데이터시트 보기 →PIC16C57C-40/P
✅ 드롭인✓ 재고 있음
$3.82 / 개
데이터시트 보기 →PIC16C57-10I/P
✅ 드롭인✓ 재고 있음
$1.75 / 개
데이터시트 보기 →PIC16C57-XTI/P 최대 정격 & 전기적 특성
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Instruction Set Width | 12-bit |
| Number of Instructions | 33 (excluding branches) |
| Program Memory Type | OTP EPROM (One-Time-Programmable) |
| Program Memory Size | 3 KB (2K x 12) |
| Data RAM | 72 bytes |
| Maximum CPU Frequency | 4 MHz |
| I/O Pins | 20 |
| Timers | TMR0 (8-bit with prescaler), TMR1 (8-bit) |
| Watchdog Timer | Yes (with on-chip RC oscillator) |
| Hardware Stack Depth | 8 levels |
| Supply Voltage (VDD) | 2.5 V to 6.25 V |
| 동작 온도 | -40 C to +85 C (Industrial) |
| 패키지 | 28-pin PDIP (0.600", 15.24 mm) |
| 실장 유형 | Through-Hole (DIP) |
PIC16C57-XTI/P 핀 구성
| 핀 1 | RA2 — Port A bit 2 (digital I/O) |
| 핀 2 | RA3 — Port A bit 3 (digital I/O) |
| 핀 3 | RA4/T0CKI — Port A bit 4 / Timer 0 clock input |
| 핀 4 | RA0 — Port A bit 0 (digital I/O) |
| 핀 5 | RA1 — Port A bit 1 (digital I/O) |
| 핀 6 | OSC1/CLKIN — Crystal oscillator input / external clock input |
| 핀 7 | RB0 — Port B bit 0 (digital I/O, interrupt-on-change capable) |
| 핀 8 | RB1 — Port B bit 1 (digital I/O) |
| 핀 9 | RB2 — Port B bit 2 (digital I/O) |
| 핀 10 | RB3 — Port B bit 3 (digital I/O) |
| 핀 11 | RB4 — Port B bit 4 (digital I/O) |
| 핀 12 | RB5 — Port B bit 5 (digital I/O) |
| 핀 13 | RB6 — Port B bit 6 (digital I/O) |
| 핀 14 | VSS — Ground reference |
| 핀 15 | RC0 — Port C bit 0 (digital I/O) |
| 핀 16 | RC1 — Port C bit 1 (digital I/O) |
| 핀 17 | RC2 — Port C bit 2 (digital I/O) |
| 핀 18 | RC3 — Port C bit 3 (digital I/O) |
| 핀 19 | RC4 — Port C bit 4 (digital I/O) |
| 핀 20 | RC5 — Port C bit 5 (digital I/O) |
| 핀 21 | RC6 — Port C bit 6 (digital I/O) |
| 핀 22 | RC7 — Port C bit 7 (digital I/O) |
| 핀 23 | VSS — Ground reference (auxiliary) |
| 핀 24 | VDD — Positive supply voltage |
| 핀 25 | VDD — Positive supply voltage (auxiliary) |
| 핀 26 | OSC2/CLKOUT — Crystal oscillator output / clock output |
| 핀 27 | NC — Not connected (per datasheet) |
| 핀 28 | /MCLR — Master clear reset (active-low) |
일반적인 애플리케이션
PIC16C57-XTI/P 적합 용도: 7 애플리케이션s: Consumer Appliance Control, Automotive Body Electronics (Non-Safety), Industrial Sensor Front-End, Remote Control and IR Transmitter, Battery-Powered Metering, Legacy Industrial Equipment Maintenance, Educational and Hobbyist Embedded Projects.
Consumer Appliance Control
The PIC16C57-XTI/P fits consumer appliance control boards because of its 20 I/O pins, low-cost OTP memory, and 4 MHz CPU clock which is sufficient for keypad scan, LED multiplexing, and relay/triac drive sequencing. The 33-instruction 12-bit core executes typical appliance logic in roughly 1-2 KB of code, fitting inside the 3 KB OTP budget with margin for state-machine extensions. Industrial temperature rating (-40C to +85C) supports kitchen and laundry environments where ambient can exceed 70C behind the control panel. Compared to Flash-based PIC16F57, the OTP variant offers lower unit cost at volumes above 10K pieces where field firmware updates are not required.
추천
Automotive Body Electronics (Non-Safety)
The PIC16C57-XTI/P is suitable for automotive body-control modules such as interior lighting, mirror adjust, and seat-position controllers, where the industrial -40C to +85C temperature range handles cabin environments and 20 I/O pins cover keypad input plus H-bridge enable outputs. The 4 MHz CPU clock is adequate for LIN-bite software-UART or simple PWM-based motor control at modest update rates. Note: this part is NOT AEC-Q100 qualified - for safety-critical or under-hood ECUs, designers must select AEC-Q100 grade PIC16F counterparts instead. The 72-byte RAM limits LIN message buffering, so the PIC16C57 fits best in slave-node body controllers with short frame handling.
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Industrial Sensor Front-End
The PIC16C57-XTI/P serves industrial 4-20 mA loop-powered sensor transmitters and remote sensor-conditioning modules that need only a handful of I/O and modest compute. The 8-bit ADC-free architecture pairs naturally with external sigma-delta ADCs (e.g., MCP3551) over SPI, and the 4 MHz clock provides 1 MIPS execution speed which is sufficient for linearization and HART-state-machine emulation in loop-powered heads. The wide 2.5V-6.25V VDD range allows direct connection to unregulated 5V industrial rails without an additional LDO. The -40C to +85C temperature range covers ISA-71.04 Class G3 industrial environments and most outdoor enclosures.
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Remote Control and IR Transmitter
The PIC16C57-XTI/P is well-matched to low-cost IR/RF remote control handsets where the 20 I/O pins drive a 4x5 keypad matrix plus an IR LED PWM output, and the 4 MHz clock generates 38 kHz / 56 kHz carrier frequencies with software PWM. The 3 KB OTP memory holds large IR-code libraries (NEC, RC5, RC6, SIRC) comfortably. The low operating current (CMOS, <2 mA active at 4 MHz / 5V) extends battery life in coin-cell or AAA-powered handsets. Watchdog timer with on-chip RC oscillator provides brown-out protection without external components.
추천
Battery-Powered Metering
The PIC16C57-XTI/P suits battery-powered metering devices like water/gas meters, electronic thermostats, and small portable instruments where its low-power CMOS design and 2.5V minimum VDD enable direct Li-coin-cell operation. The watchdog timer with internal RC oscillator lets the MCU wake from sleep every 2-3 seconds, take a sensor reading, and return to sleep with average current below 10 uA. The 4 MHz CPU clock handles BCD-to-binary conversion, LCD multiplexing for 4-digit displays, and pulse-counting for meter flow sensors. Industrial temperature range ensures operation in outdoor metering cabinets.
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Legacy Industrial Equipment Maintenance
The PIC16C57-XTI/P is most commonly sourced today for maintenance-of-existing-equipment (MROE) scenarios in industrial automation where decades-old PLCs, motor drives, and textile machinery still operate on PIC16C5X-based controller boards. Its mature, stable silicon avoids the redesign risk of cross-package migration, and the 28-PDIP through-hole package suits older wave-soldered assemblies where SMD migration would require a full board re-spin. Distributors continue to stock this part precisely because field failures of 1990s-era equipment require exact-form-factor replacements, not pin-compatible upgrades.
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Educational and Hobbyist Embedded Projects
The PIC16C57-XTI/P is widely used in educational settings and hobbyist electronics because the PIC16C5X architecture is the canonical introduction to Microchip's instruction set and the datasheet is a model of clarity for learning register-level programming. The 28-PDIP package fits standard 0.1" pitch breadboards without SMD adapters, and the 4 MHz clock is slow enough to debug with LED-based step indicators. While OTP prevents iterative reprogramming in lab use, the low per-unit cost makes the part viable for one-shot class projects. The MPLAB PM3 and ICD-like debuggers from Microchip support the PIC16C5X family fully.
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추천 제품 요약
엔지니어링 참조 데이터: PIC16C57-XTI/P — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | PIC16F57-I/P | PIC16C57-XT/P | PIC16C57C-20I/P | PIC16C57C-40/P | PIC16C57-10I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-PDIP | 28-PDIP (same) | 28-PDIP (same) | 28-PDIP (same) | 28-PDIP (same) | 28-PDIP (same) |
| Maximum CPU Frequency | 4 MHz | 4 MHz | 4 MHz | 20 MHz | 40 MHz | 10 MHz |
| Program Memory Type | OTP EPROM (3 KB) | Flash (3 KB) | OTP EPROM (3 KB) | OTP EPROM (3 KB) | OTP EPROM (3 KB) | OTP EPROM (3 KB) |
| Data RAM | 72 bytes | 72 bytes | 72 bytes | 72 bytes | 72 bytes | 72 bytes |
| I/O Pins | 20 | 20 | 20 | 20 | 20 | 20 |
| Operating Temperature Range | -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) |
| Supply Voltage (VDD) | 2.5 V to 6.25 V | 2.0 V to 5.5 V | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.5 V to 6.25 V |
주요 차별점
- Industrial temperature grade in 28-PDIP at commercial cost (vs PIC16C57-XT/P)
- Pin-compatible migration path to Flash memory (vs PIC16F57-I/P)
- 5x higher CPU clock available in same package (vs PIC16C57C-20I/P)
설계 노트
The PIC16C57-XTI/P in 28-PDIP packaging has very low power dissipation, typically under 25 mW at 4 MHz / 5V, and requires no thermal management beyond standard PCB layout. Designers should ensure the /MCLR pull-up resistor (typically 10 kohm) is placed within 1 inch of the /MCLR pin to avoid spurious resets from switching transients coupling into the reset line.
When laying out the 28-PDIP footprint, allow 0.1 inch (2.54 mm) row spacing and 0.6 inch (15.24 mm) row-to-row pitch to accept standard DIP sockets and clip-on programmers. Place the decoupling capacitor (100 nF ceramic + 10 uF electrolytic) within 5 mm of VDD pins 24-25. Keep the crystal/ceramic resonator traces short and route the OSC1/OSC2 pair together with a ground guard ring to avoid injecting noise into the internal oscillator amplifier.
Estimated: The 8-level hardware stack means deeply nested C functions will overflow and corrupt RAM. A typical assembly-style C limit is 4-5 call frames before stack corruption becomes likely. Code must be written defensively to keep call depth flat. The OTP memory cannot be erased; a single programming mistake renders the device unusable. Always use a Flash-based PIC16F57 or PIC16F84A emulator for firmware development, then port the final hex to the PIC16C57-XTI/P only after full validation.
Brown-out detection is not present on the PIC16C57-XTI/P; engineers must add an external voltage supervisor (e.g., MCP100 or MCP102) if VDD can dip below 2.5V during motor-start or load-dump transients. The POR circuit relies on VDD rise-time; for slow-rising supplies, the device may enter undefined states. The watchdog timer should be enabled in any application where software lockup could cause safety or equipment damage.
규정 준수 정보
RoHS, REACH, lead-free, and halogen-free status not explicitly stated in verified web data; the 28-PDIP package is a through-hole variant likely available in both leaded and lead-free finishes - confirm with manufacturer documentation before production. The PIC16C57-XTI/P is not AEC-Q100 qualified; AEC-Q100 grades exist only in the PIC16F family.
