PIC16C57-HSI/SP - 8-bit EPROM MCU, 3KB, 20MHz, SPDIP-28 | Microchip
MPN： PIC16C57-HSI/SP ✗ 停產PIC16C57-HSI/SP 概覽
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and peripheral interfaces such as timers, I/O ports, and interrupt controllers into one package. The PIC16C5X family occupies the entry-level, cost-sensitive tier of the broader 8-bit microcontroller category, sitting below PIC16 enhanced mid-range parts and PIC18 high-performance 8-bit families in the Microchip hierarchy. PIC microcontrollers are widely used as the "brain" of embedded systems that require deterministic real-time response, low power consumption, and reprogrammability during prototyping.
Key features of the PIC16C57-HSI/SP include an 8-bit real-time clock/counter (TMR0) with an 8-bit programmable prescaler, a two-level deep hardware stack for subroutine nesting, and three addressing modes: direct, indirect, and relative. The device offers seven or eight special-function hardware registers, an internal reset circuit, and a watchdog timer option that can be enabled via configuration bits. Power consumption is low due to CMOS technology, with multiple sleep/idle modes for battery-powered designs. I/O pins can source or sink up to 25mA per pin, allowing direct drive of LEDs and small relays.
Typical applications span consumer electronics, appliance control, automotive subsystems, industrial sensor interfaces, and educational/development platforms. The 20 I/O lines support keypad scanning, LED multiplexing, LCD bias generation, and serial communication via bit-banged protocols (UART, SPI, I2C implemented in software). The 28-pin SPDIP package makes the part well suited for hand-soldered prototypes, breadboards, and low-volume production runs where through-hole assembly is preferred.
When designing with the PIC16C57-HSI/SP, note that the part is OTP (one-time-programmable) and does not support in-circuit reprogramming. The "HSI" suffix denotes a high-speed crystal/oscillator mode with a 20MHz maximum frequency, distinct from "RC" (resistor-capacitor timing) and "LP" (low-power crystal) oscillator variants. Choose the HSI version when instruction throughput is critical; choose RC or LP when cost, board space, or power consumption is the priority.
This page synthesizes distributor pricing, package-compatible drop-in alternatives from the same PIC16C5X family, and practical design notes not found in the manufacturer datasheet. For OEM-scale volumes consider the mask-ROM equivalents (PIC16CR57) for unit-cost reduction once firmware is finalized.
直接替換替代品，適用於 PIC16C57-HSI/SP — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC16C57-HSI/SP （相同外形與佔位） — 差異在於 Package, Program Memory Size, Program Memory Type, Timers, Watchdog Timer.
PIC16C57-HSI/P
✅ 直接替換聯絡詢價
查看資料表 →PIC16C57-HS/P
✅ 直接替換聯絡詢價
查看資料表 →PIC16C57-HSE/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16C57C-40/P
✅ 直接替換聯絡詢價
查看資料表 →PIC16C57C-20/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16C57-10I/P
✅ 直接替換聯絡詢價
查看資料表 →PIC16C57CT-20I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16C57CT-40/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16C57-HSI/SP 最大額定值與電氣特性
| Family | PIC16C5X (PIC16C57) |
| Core | 8-bit RISC PIC |
| Program Memory Type | EPROM (OTP) |
| Program Memory Size | 3 KB (2K x 12) |
| RAM Size | 72 bytes |
| Data EEPROM | Not available |
| Number of I/O Pins | 20 |
| 最大時脈頻率 | 20 MHz |
| Instruction Cycle Time | 200 ns at 20 MHz |
| Oscillator Type | External high-speed crystal/oscillator (HSI mode) |
| Supply Voltage (Vdd) | 3.0 V to 5.5 V (3.3V/5V operation) |
| Timers | 1 x 8-bit (TMR0) with 8-bit prescaler |
| Hardware Stack | 2 levels |
| Watchdog Timer | Yes (configuration-bit enabled) |
| 封裝 | 28-pin SPDIP (Skinny Plastic DIP, through-hole) |
| 安裝類型 | Through-Hole |
| 工作溫度 | 0C to +70C (commercial) |
| Instruction Word Width | 12 bits |
| Data Path Width | 8 bits |
| I/O Sink/Source Current | 25 mA per pin (max) |
| RoHS 狀態 | Non-RoHS (legacy through-hole OTP) |
PIC16C57-HSI/SP 腳位配置
| 腳位 1 | RA2 — Bidirectional I/O pin, Port A bit 2 |
| 腳位 2 | RA3 — Bidirectional I/O pin, Port A bit 3 |
| 腳位 3 | T0CKI — Timer0 clock input / RA4 I/O |
| 腳位 4 | MCLR — Master Clear (active-low reset input) |
| 腳位 5 | VSS — Ground reference |
| 腳位 6 | RB0 — Bidirectional I/O pin, Port B bit 0 |
| 腳位 7 | RB1 — Bidirectional I/O pin, Port B bit 1 |
| 腳位 8 | RB2 — Bidirectional I/O pin, Port B bit 2 |
| 腳位 9 | RB3 — Bidirectional I/O pin, Port B bit 3 |
| 腳位 10 | RB4 — Bidirectional I/O pin, Port B bit 4 |
| 腳位 11 | RB5 — Bidirectional I/O pin, Port B bit 5 |
| 腳位 12 | RB6 — Bidirectional I/O pin, Port B bit 6 |
| 腳位 13 | RB7 — Bidirectional I/O pin, Port B bit 7 |
| 腳位 14 | VSS — Ground reference (secondary) |
| 腳位 15 | OSC2 — Oscillator output (crystal connection) |
| 腳位 16 | OSC1 — Oscillator input (crystal connection) |
| 腳位 17 | RC0 — Bidirectional I/O pin, Port C bit 0 |
| 腳位 18 | RC1 — Bidirectional I/O pin, Port C bit 1 |
| 腳位 19 | RC2 — Bidirectional I/O pin, Port C bit 2 |
| 腳位 20 | RC3 — Bidirectional I/O pin, Port C bit 3 |
| 腳位 21 | RC4 — Bidirectional I/O pin, Port C bit 4 |
| 腳位 22 | RC5 — Bidirectional I/O pin, Port C bit 5 |
| 腳位 23 | RC6 — Bidirectional I/O pin, Port C bit 6 |
| 腳位 24 | RC7 — Bidirectional I/O pin, Port C bit 7 |
| 腳位 25 | VDD — Positive supply voltage (3.0V to 5.5V) |
| 腳位 26 | RA0 — Bidirectional I/O pin, Port A bit 0 |
| 腳位 27 | RA1 — Bidirectional I/O pin, Port A bit 1 |
| 腳位 28 | VDD — Positive supply voltage (secondary) |
典型應用
PIC16C57-HSI/SP 適用於 6 應用s: Consumer Appliance Control, Automotive Body Electronics, Industrial Sensor Interfaces, Educational Microcontroller Trainers, Hobbyist Embedded Projects, Security and Access Control Panels.
Consumer Appliance Control
The PIC16C57-HSI/SP is well-suited as the central controller in washing machines, microwave ovens, dishwashers, and other white goods where a deterministic 8-bit MCU manages user inputs, drives relay outputs, and sequences timed events. The 20 MHz clock yields 5 MIPS throughput, which is more than sufficient for sensor polling, keypad debounce, and display multiplexing. With 20 I/O pins and 25 mA sink/source capability, the part can directly drive LED indicators, seven-segment displays, and small relays without external buffers. The 3 KB OTP EPROM stores the final production firmware once development is complete, providing the lowest unit cost in volume. The 28-pin SPDIP through-hole package simplifies manufacturing for cost-sensitive consumer products where automated SMT assembly is not yet justified.
推薦
Automotive Body Electronics
Within automotive body control modules such as seat controllers, mirror adjusters, and simple lighting drivers, the PIC16C57-HSI/SP offers the ruggedness and deterministic response needed for in-vehicle environments. The 20 I/O pins handle switch inputs, potentiometer wiper inputs, and PWM-output loads for motors and lamps, all without requiring complex peripherals. The two-level hardware stack and small interrupt latency guarantee bounded response to sensor events, critical for safety-related functions. The 3 KB EPROM holds fixed control algorithms such as motor speed curves and lamp fade profiles. Designers targeting modern automotive designs should verify AEC-Q100 qualification and consider Flash-based PIC16F or PIC18 successors; the PIC16C57-HSI/SP is appropriate for retrofit and aftermarket modules where its legacy pinout is mandated.
推薦
Industrial Sensor Interfaces
The PIC16C57-HSI/SP serves as a compact protocol converter and signal-conditioning controller in industrial sensor front ends, where it reads analog signals via external comparator or ADC, scales them, and transmits the result over bit-banged UART or SPI links. The 20 MHz instruction throughput supports modest baud rates (up to 9600 bps software UART) and 10 kHz SPI clock for sensor readout. The 8-bit TMR0 with 8-bit prescaler enables precise interval timing for periodic sampling loops. Industrial designers benefit from the simple ICE-less programming model: firmware is burned once via OTP and the part operates without firmware update infrastructure. For new industrial designs requiring field-updatable firmware or on-chip ADC, consider PIC16F1xxx or PIC18F1xxx successors in the same 28-pin SPDIP footprint.
推薦
Educational Microcontroller Trainers
Universities, technical colleges, and hobbyist electronics courses have used the PIC16C57 family since the 1990s as the canonical teaching vehicle for 8-bit embedded programming. The PIC16C57-HSI/SP provides students hands-on exposure to a simple RISC instruction set (33 instructions), 12-bit opcode architecture, and direct register manipulation without the abstraction layers of modern Cortex-M cores. Its 28-pin SPDIP package plugs directly into breadboards and solderless prototyping boards, allowing rapid experiment assembly without SMT rework tools. Lab exercises typically cover GPIO, timer interrupts, software UART, and EEPROM emulation. While OTP prevents in-circuit reprogramming, instructors can pre-program each lab session's firmware on individual chips, giving each student a fresh device for every assignment.
推薦
Hobbyist Embedded Projects
For maker projects, retro computing reproductions, and DIY electronics, the PIC16C57-HSI/SP provides a low-cost 8-bit MCU with a famously simple toolchain and well-documented instruction set. Hobbyists can build Morse code beacons, LED chasers, simple robots, and homebrew computer peripherals using only a programmer (such as the Microchip MPLAB PM3) and the part itself. The 20 MHz clock and 5 MIPS throughput are more than adequate for bit-banged protocols, sensor reading, and display driving. Through-hole SPDIP construction is accessible to hand-soldering and breadboard prototyping without specialized SMT equipment. The active online community around the PIC16C5X family supplies sample code and reference designs, even though the part itself is now NRND and best reserved for legacy or learning purposes.
推薦
Security and Access Control Panels
The PIC16C57-HSI/SP can manage keypad scanning, door strike timing, alarm zone monitoring, and simple LED status indication in low-end security panels. With 20 I/O pins, the MCU can read up to 16 keypad switches (4x4 matrix) plus several sensor zones and status LEDs, all while sequencing the lock relay with millisecond precision. The 8-bit TMR0 generates the periodic scan interrupt used to debounce inputs and drive the sounder. The OTP EPROM ensures that once programmed with the panel firmware, the device cannot be tampered with by firmware-rewrite attacks, which is a security advantage for fixed-function security products. Designers building new security panels should evaluate whether Flash-based parts with secure firmware-update mechanisms would better serve modern threat models, while the PIC16C57-HSI/SP remains a viable choice for legacy panel redesigns.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16C57-HSI/SP — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC16C57-HSI/P | PIC16C57-HS/P | PIC16C57-HSE/SO | PIC16C57C-40/P |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-pin SPDIP | 28-pin SPDIP - same | 28-pin SPDIP - same | 28-pin SPDIP - same | 28-pin SPDIP - same |
| Program Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM (C revision) |
| Program Memory Size | 3 KB | 3 KB | 3 KB | 3 KB | 3 KB |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 40 MHz |
| RAM Size | 72 bytes | 72 bytes | 72 bytes | 72 bytes | 72 bytes |
| Number of I/O Pins | 20 | 20 | 20 | 20 | 20 |
| Supply Voltage | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V |
主要差異化特點
- Highest 20 MHz throughput in original PIC16C5X OTP family (對比PIC16C57-10I/P)
- OSC2 oscillator amplifier optimized for HS crystals (對比PIC16C57-HS/P)
- Legacy Microchip PIC16C5X pinout enables socket-level upgrade path (對比PIC16C57C-40/P)
設計說明
The PIC16C57-HSI/SP draws a few mA active at 20 MHz and approximately 1-5 microamps in sleep mode, depending on oscillator and watchdog settings. Place a 100 nF ceramic decoupling capacitor as close as possible to the VDD pin (pin 25) and a bulk capacitor (10 uF tantalum or aluminum) at the PCB power entry. If the application uses the MCLR pin as a reset input, add a 10 kohm pull-up to VDD and a 100 nF capacitor to ground for proper power-on reset timing; omitting this RC network can cause intermittent startup failures.
The HSI suffix specifies a high-speed oscillator amplifier optimized for crystals in the 4-20 MHz range. Use a parallel-resonant fundamental-mode crystal with load capacitors sized by the formula CL = (C1 x C2) / (C1 + C2) + Cstray, where Cstray is approximately 5-10 pF. Typical 20 MHz designs use 15-33 pF ceramic capacitors. Series resistor (Rs) of 100-330 ohm in series with OSC2 can dampen harmonic distortion and improve startup margin in electrically noisy environments.
Critical pitfalls: (1) OTP EPROM cannot be erased - the part must be programmed correctly the first time, so use a ZIF socket or adapter during development. (2) The PIC16C5X has only a 2-level hardware stack, limiting nested subroutines to depth 2; deep recursion will cause stack overflow and unpredictable return. (3) Watchdog timer, if enabled in configuration bits, must be periodically cleared in firmware or it will reset the part; leave it disabled if not needed. (4) The T0CKI pin shares with RA4 - configuring it as timer input disables RA4 as GPIO. (5) Port pins default to input mode on reset; configure TRIS registers before driving outputs.
Layout guidelines: keep the crystal and its load capacitors within 5 mm of OSC1 and OSC2 pins to minimize stray capacitance and EMI pickup. Route MCLR trace away from high-current switching nodes (relays, motor drivers) and place the reset RC network close to the MCLR pin. Provide a solid ground plane under the MCU for stable logic reference, and keep I/O traces short to reduce radiated emissions from 20 MHz edges. If the design includes a programming header (ICSP), follow Microchip's recommended 6-pin ICSP layout to allow field programming without desoldering.
合規資訊
Legacy through-hole OTP MCU predates RoHS conversion; lead-free and halogen-free status not verified. Not AEC-Q100 qualified for automotive use. REACH SVHC declaration available on Microchip product page.
