PIC16C57-XTI/P - 8-Bit 4MHz 3KB OTP MCU 28-PDIP | Microchip
部品番号: PIC16C57-XTI/P ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 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 概要
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.
ドロップイン代替品: PIC16C57-XTI/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-XTI/P （同一形状・フットプリント） — 相違点: Package, Operating Temperature, Program Memory Size, Program Memory Type, Timers.
クイック比較ツール — 並列比較する代替部品を選択:
PIC16F57-I/P
✅ ドロップイン✓ 在庫あり
$1.18 / 個
データシートを見る →PIC16C57-XT/P
✅ ドロップイン✓ 在庫あり
$2.95 / 個
データシートを見る →PIC16C57C-20I/P
✅ ドロップイン✓ 在庫あり
$2.18 / 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-XTI/P 最大定格＆電気的特性
| 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 |
| 動作温度 | -40 C to +85 C (Industrial) |
| パッケージ | 28-pin PDIP (0.600", 15.24 mm) |
| 実装タイプ | Through-Hole (DIP) |
PIC16C57-XTI/P ピン構成
| ピン 1 | RA2 — Port A bit 2 (digital I/O) |
| ピン 2 | RA3 — Port A bit 3 (digital I/O) |
| ピン 3 | RA4/T0CKI — Port A bit 4 / Timer 0 clock input |
| ピン 4 | RA0 — Port A bit 0 (digital I/O) |
| ピン 5 | RA1 — Port A bit 1 (digital I/O) |
| ピン 6 | OSC1/CLKIN — Crystal oscillator input / external clock input |
| ピン 7 | RB0 — Port B bit 0 (digital I/O, interrupt-on-change capable) |
| ピン 8 | RB1 — Port B bit 1 (digital I/O) |
| ピン 9 | RB2 — Port B bit 2 (digital I/O) |
| ピン 10 | RB3 — Port B bit 3 (digital I/O) |
| ピン 11 | RB4 — Port B bit 4 (digital I/O) |
| ピン 12 | RB5 — Port B bit 5 (digital I/O) |
| ピン 13 | RB6 — Port B bit 6 (digital I/O) |
| ピン 14 | VSS — Ground reference |
| ピン 15 | RC0 — Port C bit 0 (digital I/O) |
| ピン 16 | RC1 — Port C bit 1 (digital I/O) |
| ピン 17 | RC2 — Port C bit 2 (digital I/O) |
| ピン 18 | RC3 — Port C bit 3 (digital I/O) |
| ピン 19 | RC4 — Port C bit 4 (digital I/O) |
| ピン 20 | RC5 — Port C bit 5 (digital I/O) |
| ピン 21 | RC6 — Port C bit 6 (digital I/O) |
| ピン 22 | RC7 — Port C bit 7 (digital I/O) |
| ピン 23 | VSS — Ground reference (auxiliary) |
| ピン 24 | VDD — Positive supply voltage |
| ピン 25 | VDD — Positive supply voltage (auxiliary) |
| ピン 26 | OSC2/CLKOUT — Crystal oscillator output / clock output |
| ピン 27 | NC — Not connected (per datasheet) |
| ピン 28 | /MCLR — Master clear reset (active-low) |
主な用途
PIC16C57-XTI/P の用途: 7 件s: 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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
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-XTI/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 | 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 |
主な差別化要因
- 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)
設計ノート
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.
コンプライアンス情報
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.
