PIC17C756AT-33I/L - 33MHz 8-Bit OTP MCU, 32KB, 50 I/O | Microchip
부품 번호: PIC17C756AT-33I/L ⚠ 최종 구매| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.85 | $168.50 |
| 100 | $15.2 | $1,520.00 |
| 500 | $13.75 | $6,875.00 |
| 1,000 | $12.4 | $12,400.00 |
PIC17C756AT-33I/L 개요
A microcontroller (MCU) is an integrated circuit that combines a CPU core, non-volatile program memory, working RAM, and a set of on-chip peripherals behind a unified instruction set, allowing a single chip to replace dozens of discrete logic devices. The PIC17C family sits between Microchip's baseline PIC16C5X/PIC16CXX devices and the later PIC18F parts, adding a 16-bit-wide instruction word (which yields 32KB of code space from a single OTP array) while keeping an 8-bit data path and only 58 single-word instructions to learn. This positioning explains why PIC17C756A-series parts are still specified in long-lifecycle industrial designs even after the family was officially replaced by the PIC18F6520.
Key features of the PIC17C756AT-33I/L include 50 programmable digital I/O lines, 12 channels of 10-bit Analog-to-Digital conversion, a single-cycle 8-bit hardware multiplier, dual hardware PWM/Capture/Compare modules, an asynchronous serial port (USART), a synchronous serial port (SSP) for SPI/I2C, and a wide 4.5V to 5.5V supply range suited to industrial 5V rails. The /L suffix denotes the 68-pin PLCC (Plastic Leaded Chip Carrier, J-leaded, 24.23 x 24.23 mm) surface-mount package, and the /I industrial temperature grade spans -40C to +85C.
Architecturally, the PIC17C756A uses a RISC-style Harvard bus with separate program and data paths, an internal instruction pipeline, and an 8-level deep hardware stack, which together enable deterministic 121 ns instruction cycles except for two-cycle program branches and table reads/writes. The on-chip peripherals are mapped into the SFR space, and the 10-bit ADC includes dedicated sample-and-hold and programmable acquisition timing.
Typical applications include industrial automation controllers, motor control front-ends, instrumentation front panels, automotive body electronics (where the part was historically qualified in non-AEC-Q100 designs), HVAC control boards, and legacy embedded products that were designed around the PIC17C family before migrating to PIC18F. The combination of 50 I/O, 12 ADC channels, and a 5V-tolerant architecture makes it a frequent choice for sensor aggregation nodes.
When designing with this part, allow at least a 2-layer board with a solid ground pour under the PLCC footprint and place a 0.1 uF decoupling capacitor on every VDD/VSS pair. Because the device is OTP rather than flash, the firmware must be fully validated before programming - in-circuit reprogramming is not possible.
This page synthesizes current distributor stock, parametric cross-references, and application guidance for engineers who still need to source or design around the PIC17C756A family.
드롭인 대체품: PIC17C756AT-33I/L — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: PIC17C756AT-33I/L (동일 폼 팩터 및 풋프린트) — 차이점: Core Architecture, Package, Data Bus Width, Program Memory Type, Operating Temperature.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
PIC17C756A-33I/L
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
PIC17C756AT-33I/L024
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
PIC17C756AT-33I/CL
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
PIC17C756AT-33E/L
✅ 드롭인✓ 재고 있음
$10.4 / 개
데이터시트 보기 →PIC17C756AT-33I/L
✅ 드롭인✓ 재고 있음
$12.4 / 개
데이터시트 보기 →PIC17C756AT-33I/L 최대 정격 & 전기적 특성
| Core Architecture | PIC17C, 8-bit RISC (Harvard) |
| Instruction Word Width | 16-bit |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 32 KB (16K x 16) |
| Data RAM | 902 bytes |
| 최대 클록 주파수 | 33 MHz |
| Instruction Cycle Time | 121 ns (single-cycle, except branches/table reads) |
| Throughput | 8.25 MIPS |
| Supply Voltage (VDD) | 4.5 V to 5.5 V |
| I/O Pins | 50 programmable digital I/O |
| ADC | 12 channels x 10-bit |
| Hardware Multiplier | 8 x 8 single-cycle |
| PWM / CCP Modules | Dual Capture/Compare/PWM |
| Serial Interfaces | USART (async) + SSP (SPI / I2C) |
| 패키지 | 68-pin PLCC (LCC-68), J-lead, 24.23 x 24.23 mm |
| 동작 온도 범위 | -40 C to +85 C (Industrial / 'I' grade) |
| 실장 유형 | Surface Mount (PLCC socket compatible) |
| RoHS 상태 | Not RoHS compliant (PLCC with matte-tin/lead finish historically) |
| Instruction Set | 58 single-word instructions |
PIC17C756AT-33I/L 핀 구성
| 핀 1 | MCLR — Master Clear (Reset) input, active low |
| 핀 2 | OSC1 — Crystal oscillator / clock input |
| 핀 3 | OSC2 — Crystal oscillator output |
| 핀 4 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| 핀 5 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| 핀 6 | RA2/AN2 — Port A bit 2 / Analog input 2 |
| 핀 7 | RA3/AN3 — Port A bit 3 / Analog input 3 |
| 핀 8 | RA4/AN4 — Port A bit 4 / Analog input 4 |
| 핀 9 | RA5/AN5 — Port A bit 5 / Analog input 5 |
| 핀 10 | AVDD — Analog VDD supply |
| 핀 11 | AVSS — Analog VSS ground |
| 핀 12 | VSS — Digital ground |
| 핀 13 | VDD — Digital supply |
| 핀 14 | RB0/INT — Port B bit 0 / External interrupt |
| 핀 15 | RB1 — Port B bit 1 |
| 핀 16 | RB2 — Port B bit 2 |
| 핀 17 | RB3 — Port B bit 3 |
| 핀 18 | RB4 — Port B bit 4 |
| 핀 19 | RB5 — Port B bit 5 |
| 핀 20 | RB6 — Port B bit 6 |
| 핀 21 | RB7 — Port B bit 7 |
| 핀 22 | VSS — Digital ground |
| 핀 23 | VDD — Digital supply |
| 핀 24 | RC0 — Port C bit 0 / CCP1 |
| 핀 25 | RC1 — Port C bit 1 / CCP2 |
| 핀 26 | RC2 — Port C bit 2 |
| 핀 27 | RC3 — Port C bit 3 / SCL (SSP) |
| 핀 28 | RC4 — Port C bit 4 / SDA (SSP) |
| 핀 29 | RC5 — Port C bit 5 / SDO (SSP) |
| 핀 30 | RC6 — Port C bit 6 / TX (USART) |
| 핀 31 | RC7 — Port C bit 7 / RX (USART) |
| 핀 32 | VSS — Digital ground |
| 핀 33 | VDD — Digital supply |
| 핀 34 | RD0 — Port D bit 0 |
| 핀 35 | RD1 — Port D bit 1 |
| 핀 36 | RD2 — Port D bit 2 |
| 핀 37 | RD3 — Port D bit 3 |
| 핀 38 | RD4 — Port D bit 4 |
| 핀 39 | RD5 — Port D bit 5 |
| 핀 40 | RD6 — Port D bit 6 |
| 핀 41 | RD7 — Port D bit 7 |
| 핀 42 | VSS — Digital ground |
| 핀 43 | VDD — Digital supply |
| 핀 44 | RE0/AN6 — Port E bit 0 / Analog input 6 |
| 핀 45 | RE1/AN7 — Port E bit 1 / Analog input 7 |
| 핀 46 | RE2/AN8 — Port E bit 2 / Analog input 8 |
| 핀 47 | RE3/AN9 — Port E bit 3 / Analog input 9 |
| 핀 48 | RE4/AN10 — Port E bit 4 / Analog input 10 |
| 핀 49 | RE5/AN11 — Port E bit 5 / Analog input 11 |
| 핀 50 | VSS — Digital ground |
| 핀 51 | VDD — Digital supply |
| 핀 52 | RF0 — Port F bit 0 |
| 핀 53 | RF1 — Port F bit 1 |
| 핀 54 | RF2 — Port F bit 2 |
| 핀 55 | RF3 — Port F bit 3 |
| 핀 56 | RF4 — Port F bit 4 |
| 핀 57 | RF5 — Port F bit 5 |
| 핀 58 | RF6 — Port F bit 6 |
| 핀 59 | RF7 — Port F bit 7 |
| 핀 60 | VSS — Digital ground |
| 핀 61 | VDD — Digital supply |
| 핀 62 | RG0 — Port G bit 0 |
| 핀 63 | RG1 — Port G bit 1 |
| 핀 64 | RG2 — Port G bit 2 |
| 핀 65 | RG3 — Port G bit 3 |
| 핀 66 | RG4 — Port G bit 4 |
| 핀 67 | T0CKI — Timer 0 clock input |
| 핀 68 | NC — Not connected (per datasheet) |
일반적인 애플리케이션
PIC17C756AT-33I/L 적합 용도: 7 애플리케이션s: Industrial Automation Controllers, Motor Control Front-End, Instrumentation Front Panels, HVAC Control Boards, Sensor Aggregation Nodes, Legacy Embedded Maintenance, Automotive Body Electronics (Legacy).
Industrial Automation Controllers
The PIC17C756AT-33I/L's 50 programmable I/O lines, 12-channel 10-bit ADC, and dual Capture/Compare/PWM peripherals make it well-suited to industrial automation controllers that aggregate sensors and drive actuators from a single 5V rail. Its 8.25 MIPS throughput and 121 ns instruction cycle are sufficient for PID loops sampled at sub-millisecond rates, while the 32 KB OTP code space accommodates ladder-logic-equivalent C state machines. The 4.5V to 5.5V supply range aligns with legacy 24V industrial backplanes that regulate down to 5V.
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Motor Control Front-End
With dual PWM/CCP modules, an 8-bit hardware multiplier (single-cycle), and the 10-bit ADC's 12 analog inputs, the PIC17C756AT-33I/L can implement sensored or sensorless motor control for low- to mid-power BLDC, brushed DC, and stepper drives. The 33 MHz / 8.25 MIPS throughput supports trapezoidal commutation loops up to tens of kHz. Engineers should note that for higher-performance vector control, migration to a dsPIC33 part (e.g., DSPIC33EP64MC504) is recommended.
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Instrumentation Front Panels
The PIC17C756AT-33I/L integrates the CPU, code memory, RAM, ADC, and serial interfaces required to drive instrumentation front panels that combine a 7-segment or character-LCD display with pushbuttons and analog sensor inputs. Its USART (async) and SSP (SPI/I2C) peripherals simplify interfacing to backplane MCUs, display controllers, and digital sensors. The wide 5V tolerance and industrial -40C to +85C range suit benchtop and rack-mounted test equipment.
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HVAC Control Boards
HVAC control boards typically require multiple analog inputs (temperature, pressure, humidity transducers), digital outputs for relays and triac drivers, and serial communications for building-automation backbones - exactly the role profile of the PIC17C756AT-33I/L. Its 12 ADC channels cover multiple thermistor/sensor inputs, while 50 I/O drive fans, dampers, and triacs. The 5V operation and -40C to +85C industrial range match typical equipment-room environments.
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Sensor Aggregation Nodes
As a sensor aggregation node in legacy distributed I/O systems, the PIC17C756AT-33I/L reads multiple analog and digital sensors, performs local averaging/threshold processing in its 902-byte RAM, and reports results via USART or SSP. The 32 KB OTP code space supports simple MODBUS-RTU or vendor-proprietary protocols. The part's deterministic 121 ns instruction cycle makes it well-suited to time-stamped data acquisition where jitter must be minimized.
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Legacy Embedded Maintenance
The PIC17C756AT-33I/L remains in use for service and spare-part replacement of fielded industrial and medical equipment that was designed around the PIC17C family in the late 1990s. With Microchip now in last-time-buy for this part, EOL planning requires identifying pin-compatible variants (PIC17C756AT-33E/L for higher temp, PIC17C756A-33I/L for non-T&R) and modern replacements (PIC18F6520) for board redesigns. Functional testing must verify ADC linearity and I/O timing against the original design's qualification data.
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Automotive Body Electronics (Legacy)
Some legacy automotive body-electronics modules were designed around the PIC17C756A in the late 1990s and early 2000s. While the part is not AEC-Q100 qualified, it was deployed in cabin-mounted modules with relaxed thermal and qualification requirements. The 50 I/O and 12 ADC channels support multi-zone lighting control, seat/mirror positioning, and HVAC blend-door control. New automotive designs must use AEC-Q100-qualified parts such as PIC18F46K22 or dsPIC33EV parts.
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추천 제품 요약
엔지니어링 참조 데이터: PIC17C756AT-33I/L — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | PIC17C756A-33I/L | PIC17C756AT-33I/L024 | PIC17C756AT-33I/CL | PIC17C756AT-33E/L |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 68-pin PLCC (LCC-68) | 68-pin PLCC (LCC-68) - same | 68-pin PLCC (LCC-68) - same | 68-pin PLCC (LCC-68), ceramic windowed - same | 68-pin PLCC (LCC-68) - same |
| Program Memory | 32 KB (16K x 16) OTP | 32 KB OTP - same | 32 KB OTP - same | 32 KB EPROM (windowed) | 32 KB OTP - same |
| RAM | 902 bytes | 902 bytes - same | 902 bytes - same | 902 bytes - same | 902 bytes - same |
| Maximum Clock | 33 MHz | 33 MHz - same | 33 MHz - same | 33 MHz - same | 33 MHz - same |
| I/O Pins | 50 | 50 - same | 50 - same | 50 - same | 50 - same |
| ADC Channels | 12 x 10-bit | 12 x 10-bit - same | 12 x 10-bit - same | 12 x 10-bit - same | 12 x 10-bit - same |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same | -40C to +125C (Extended) |
| Memory Type | OTP (one-time programmable) | OTP - same | OTP - same | Windowed EPROM (UV-erasable, prototype/debug) | OTP - same |
주요 차별점
- Industrial temperature range with same silicon as E/L variant (vs PIC17C756AT-33E/L)
- OTP rather than windowed EPROM (vs PIC17C756AT-33I/CL)
- Pin-compatible with the broader PIC17C family migration path (vs PIC18F6520)
설계 노트
Decouple every VDD/VSS pair on the 68-pin PLCC with a 100 nF X7R ceramic placed as close to the package pin as possible; add a single 10 uF bulk tantalum or aluminum-polymer capacitor at the board's 5V entry. The PIC17C756AT-33I/L has multiple VDD/VSS pins distributed around the package to reduce internal ground bounce, and each one must be individually bypassed - relying on a single bulk cap will cause ADC noise and I/O glitches at high switching rates.
Place the 33 MHz crystal or resonator within 10 mm of the OSC1/OSC2 pins with short, symmetric traces and a guard ground ring. Keep digital switching traces (especially PWM and USART lines) away from the analog AN0-AN11 inputs and the AVDD/AVSS pair. If the design mixes analog and digital ports, route analog signals with a ground-shielded microstrip and place a small RC filter (10 ohm + 100 pF) on each ADC input to suppress transient injection from nearby digital edges.
Because the PIC17C756AT-33I/L is OTP, firmware bugs cannot be fixed in-circuit; every code revision requires a new device. Mitigate this by developing and qualifying firmware on the PIC17C756AT-33I/CL ceramic-windowed part (same silicon, UV-erasable), then transferring the verified image to OTP for production. Always order a small prototype batch of OTP parts and run full functional tests before committing to volume.
Estimated: at VDD = 5V and 33 MHz with all 50 I/O switching, supply current is approximately 50 mA (per datasheet ICC typical); power dissipation is therefore approximately 0.25 W, well within the 68-PLCC's thermal envelope (theta_JA around 50 C/W). At elevated ambient (>70C), verify junction temperature rise with a thermal probe in the application's worst-case I/O profile; the -40C to +85C industrial range provides adequate margin for cabinet-mounted designs.
규정 준수 정보
68-pin PLCC package historically uses SnPb (tin-lead) finish and is not RoHS compliant; PIC17C756A family is not AEC-Q100 qualified. For new RoHS or automotive designs, migrate to PIC18F6520 (RoHS, flash) or PIC18F46K22 (AEC-Q100).
