PIC17C756AT-33/PT - 8-bit 33MHz OTP MCU, 32KB | Microchip
Référence : PIC17C756AT-33/PT ⚠ Dernier achat| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $4.7832 | $4,78 |
| 10 | $4.31 | $43,10 |
| 100 | $3.85 | $385,00 |
| 500 | $3.42 | $1 710,00 |
| 1 000 | $3.05 | $3 050,00 |
PIC17C756AT-33/PT Présentation
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, RAM, and peripheral interfaces. The PIC17C series sits above the PIC16C family in Microchip's 8-bit hierarchy, offering higher instruction throughput (8.25 MIPS at 33 MHz), a wider 16-bit program memory data bus, and extended peripherals while maintaining upward compatibility with PIC16C5X, PIC12CXXX, and PIC16CXX code. OTP (One-Time Programmable) EPROM technology is suited for volume production where the firmware is finalized but does not need field re-programmability.
Key features include the 33 MHz clock input, single-cycle hardware multiplier, 121 ns instruction execution (excluding branches and table reads/writes which take two cycles), Brown-out Detect/Reset, Power-on Reset, Watchdog Timer, PWM, plus serial interfaces (I2C, SPI, USART) and a 10-bit ADC. According to the verified Microchip product page, the part operates from a single 4.5 V to 5.5 V supply and provides 50 general-purpose I/O pins.
The PIC17C756A architecture uses a RISC-style Harvard CPU with a 16-bit program memory bus and 8-bit data path, an 8-level hardware stack, and interrupt logic supporting 12 sources. The wide external memory bus and 10-bit ADC make it suitable for mixed-signal embedded control.
Typical applications include industrial motor control, building automation, instrumentation front-ends, and embedded control requiring moderate code density with 32 KB of OTP and 50 I/O lines. It is also used in legacy designs where Microchip recommends migrating to PIC18F6520 for new designs.
When designing with this device, ensure the 4.5-5.5 V supply is well-decoupled and that oscillator layout guidelines are followed because the 33 MHz clock leaves little timing margin. Microchip recommends PIC18F6520 as a modern, flash-based successor.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that consolidate information not found in the manufacturer datasheet alone.
Alternatives de remplacement direct pour PIC17C756AT-33/PT — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PIC17C756AT-33/PT (même facteur de forme et même empreinte) — différant par Data Bus Width, Program Memory Type, ADC, Core Architecture, Package.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC17C756AT-33I/PT
✅ Remplacement direct✓ En stock
$9.15 / unité
Voir la fiche technique →PIC17C756AT-16/PT
✅ Remplacement direct✓ En stock
$11.95 / unité
Voir la fiche technique →PIC17C756A-16I/PT
✅ Remplacement direct✓ En stock
$11.2 / unité
Voir la fiche technique →PIC17C756A-16E/PT
✅ Remplacement direct✓ En stock
$16.8 / unité
Voir la fiche technique →PIC17C756A-33E/PT
✅ Remplacement direct✓ En stock
$7.55 / unité
Voir la fiche technique →PIC17C756AT-33/PT Valeurs maximales et caractéristiques électriques
| Core Processor | PIC |
| Core Size | 8-bit |
| Core Series | PIC17C |
| Clock Speed (max) | 33 MHz |
| Instruction Cycle Time | 121 ns (single-cycle) |
| Throughput | 8.25 MIPS |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 32 KB (16K x 16) |
| RAM Size | 902 x 8 bytes |
| Largeur du bus de données | 16-bit (program) / 8-bit (data) |
| Number of I/O Pins | 50 |
| ADC | 10-bit A/D converter |
| Supply Voltage (Vdd) | 4.5 V to 5.5 V |
| Boîtier | 64-pin TQFP (10x10 mm) |
| Type de montage | Surface Mount |
| Packaging | Tape & Reel |
| Connectivity | I2C, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
Configuration des broches de PIC17C756AT-33/PT
| Broche 1 | OSC1 — Oscillator input |
| Broche 2 | OSC2 — Oscillator output |
| Broche 3 | MCLR — Master clear reset input |
| Broche 4 | RA0 — PORTA I/O / analog input |
| Broche 5 | RA1 — PORTA I/O / analog input |
| Broche 6 | RA2 — PORTA I/O / analog input |
| Broche 7 | RA3 — PORTA I/O / analog input |
| Broche 8 | RA4 — PORTA I/O / analog input |
| Broche 9 | RA5 — PORTA I/O / analog input |
| Broche 10 | RA6 — PORTA I/O / analog input |
| Broche 11 | RA7 — PORTA I/O / analog input |
| Broche 12 | VSS — Ground |
| Broche 13 | VDD — Positive supply |
| Broche 14 | RB0 — PORTB I/O / interrupt |
| Broche 15 | RB1 — PORTB I/O |
| Broche 16 | RB2 — PORTB I/O |
| Broche 17 | RB3 — PORTB I/O |
| Broche 18 | RB4 — PORTB I/O |
| Broche 19 | RB5 — PORTB I/O |
| Broche 20 | RB6 — PORTB I/O / ICSP clock |
| Broche 21 | RB7 — PORTB I/O / ICSP data |
| Broche 22 | RC0 — PORTC I/O |
| Broche 23 | RC1 — PORTC I/O |
| Broche 24 | RC2 — PORTC I/O |
| Broche 25 | RC3 — PORTC I/O / SCL |
| Broche 26 | RC4 — PORTC I/O / SDA |
| Broche 27 | RC5 — PORTC I/O |
| Broche 28 | RC6 — PORTC I/O / TX |
| Broche 29 | RC7 — PORTC I/O / RX |
| Broche 30 | VSS — Ground |
| Broche 31 | VDD — Positive supply |
| Broche 32 | RD0 — PORTD I/O |
| Broche 33 | RD1 — PORTD I/O |
| Broche 34 | RD2 — PORTD I/O |
| Broche 35 | RD3 — PORTD I/O |
| Broche 36 | RD4 — PORTD I/O |
| Broche 37 | RD5 — PORTD I/O |
| Broche 38 | RD6 — PORTD I/O |
| Broche 39 | RD7 — PORTD I/O |
| Broche 40 | RE0 — PORTE I/O |
| Broche 41 | RE1 — PORTE I/O |
| Broche 42 | RE2 — PORTE I/O |
| Broche 43 | RE3 — PORTE I/O |
| Broche 44 | RE4 — PORTE I/O |
| Broche 45 | RE5 — PORTE I/O |
| Broche 46 | RE6 — PORTE I/O |
| Broche 47 | RE7 — PORTE I/O |
| Broche 48 | VSS — Ground |
| Broche 49 | VDD — Positive supply |
| Broche 50 | RF0 — PORTF I/O / analog |
| Broche 51 | RF1 — PORTF I/O / analog |
| Broche 52 | RF2 — PORTF I/O / analog |
| Broche 53 | RF3 — PORTF I/O / analog |
| Broche 54 | RF4 — PORTF I/O / analog |
| Broche 55 | RF5 — PORTF I/O / analog |
| Broche 56 | RF6 — PORTF I/O / analog |
| Broche 57 | RF7 — PORTF I/O / analog |
| Broche 58 | RG0 — PORTG I/O |
| Broche 59 | RG1 — PORTG I/O |
| Broche 60 | RG2 — PORTG I/O |
| Broche 61 | RG3 — PORTG I/O |
| Broche 62 | RG4 — PORTG I/O |
| Broche 63 | RG5 — PORTG I/O |
| Broche 64 | VSS — Ground |
Applications typiques
PIC17C756AT-33/PT convient pour 6 applications: Industrial Motor Control, Building Automation Controllers, Instrumentation Front-Ends, Embedded Control Legacy Replacement, POS Terminals and Printers, Security and Access Control Panels.
Industrial Motor Control
The PIC17C756AT-33/PT's 33 MHz clock and 8.25 MIPS throughput give it enough headroom for sensorless and sensored BLDC motor commutation loops that require sub-100 us cycle times. Its on-chip PWM modules, 10-bit ADC, and 50 I/O pins support three-phase inverter control with current sensing, fault inputs, and quadrature encoder feedback on a single MCU. Engineers pair it with IR2101 gate drivers and ACS712 current sensors; the wide 4.5-5.5 V supply tolerates 24 V industrial bus rails after regulation. OTP memory is acceptable for fixed-function industrial controllers where firmware is locked at production.
Recommandé
Building Automation Controllers
HVAC and lighting controllers benefit from the PIC17C756AT-33/PT's 50 I/O pins, which can directly drive multiple relay banks, keypad matrices, and triac optocouplers without external I/O expanders. The 33 MHz instruction rate handles Modbus and BACnet protocol stacks over UART while leaving cycles for scheduling logic. Brown-out Detect and Watchdog Timer provide robust operation in noisy building electrical environments. The 32 KB OTP program memory fits typical building automation firmware with comfortable headroom for future feature additions.
Recommandé
Instrumentation Front-Ends
The PIC17C756AT-33/PT's 10-bit ADC and 33 MHz throughput make it suitable for low-speed instrumentation such as digital panel meters, bench multimeters, and process signal conditioners. The wide 16-bit program memory bus simplifies lookup-table calibration of sensor nonlinearity, while 902 bytes of RAM hold measurement buffers and display refresh data. Combined with a 4.5-5.5 V supply and external precision references like REF02, designers can achieve 0.1% FS accuracy for industrial process signals without a separate analog processor.
Recommandé
Embedded Control Legacy Replacement
The PIC17C756AT-33/PT serves as a long-term replacement for installed-base industrial controllers where original firmware is locked in OTP and cannot be reflashed. With Microchip's last-time-buy notice recommending PIC18F6520, current users can stock PIC17C756AT-33/PT inventory to maintain spare-part availability for years of field service. Pin compatibility with PIC17C756AT-33I/PT (industrial temp) and PIC17C756A-33E/PT (extended temp) simplifies cross-grade spares planning across commercial, industrial, and extended-temperature deployments.
Recommandé
POS Terminals and Printers
The PIC17C756AT-33/PT's UART, SPI, and I2C connectivity supports connection to thermal printer heads, keypads, and cash-drawer solenoids in point-of-sale terminals. Its 33 MHz clock encodes receipts and handles bitmap font rendering in real time without external coprocessors. The 50 I/O pins interface with LCD character displays, barcode scanner LEDs, and magnetic-stripe readers; the 32 KB OTP holds multi-language firmware tables. Brown-out and Watchdog Timer features keep unattended kiosks running reliably across power disturbances.
Recommandé
Security and Access Control Panels
Access control panels with multi-door supervision benefit from the PIC17C756AT-33/PT's 50 I/O pins to read Wiegand card readers, supervise door strikes, and drive piezo buzzers for alarms. The 10-bit ADC can monitor backup battery voltage for low-battery alerts, and the on-chip UART links to central monitoring stations. OTP memory prevents field tampering with firmware, a security advantage over flash MCUs. Industrial temperature parts (PIC17C756AT-33I/PT) are preferred for outdoor or unconditioned security enclosures.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC17C756AT-33/PT — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC17C756AT-33I/PT | PIC17C756AT-16/PT | PIC17C756A-16I/PT | PIC17C756A-16E/PT | PIC17C756A-33E/PT |
|---|---|---|---|---|---|---|
| Package | 64-pin TQFP (10x10 mm) | 64-pin TQFP - same | 64-pin TQFP - same | 64-pin TQFP - same | 64-pin TQFP - same | 64-pin TQFP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Clock Speed | 33 MHz | 33 MHz | 16 MHz | 16 MHz | 16 MHz | 33 MHz |
| Program Memory | 32 KB OTP | 32 KB OTP | 32 KB OTP | 32 KB OTP | 32 KB OTP | 32 KB OTP |
| RAM Size | 902 bytes | 902 bytes | 902 bytes | 902 bytes | 902 bytes | 902 bytes |
| Temperature Grade | Commercial (0C to +70C) | Industrial (-40C to +85C) | Commercial | Industrial | Extended | Extended |
| Packaging Format | Tape & Reel | Tape & Reel | Tube | Tube | Tube | Tube |
| Number of I/O | 50 | 50 | 50 | 50 | 50 | 50 |
| Lifecycle Status | Last Time Buy | Last Time Buy | Last Time Buy | Last Time Buy | Last Time Buy | Last Time Buy |
Principaux différenciateurs
- Highest throughput in PIC17C family (vs PIC17C756AT-16/PT)
- Tape & Reel packaging for high-volume assembly (vs PIC17C756A-33E/PT)
- True drop-in with no firmware change required (vs PIC18F6520)
Notes de conception
The PIC17C756AT-33/PT operates from a single 4.5 V to 5.5 V supply. Place a 100 nF ceramic decoupling capacitor within 5 mm of each VDD/VSS pair on the package (typically pins 13, 31, 49 are VDD; pins 12, 30, 48, 64 are VSS). Add a 10 uF bulk tantalum or ceramic capacitor at the board's supply input. The 33 MHz oscillator creates high-frequency switching noise that can corrupt ADC readings if supply impedance is high.
Route the 33 MHz crystal or oscillator traces (OSC1/OSC2, pins 1-2) on the top layer with a guard ground pour on the opposite side and keep trace lengths under 10 mm. Avoid routing digital signals directly under the crystal traces to prevent capacitive coupling. Place the MCLR pull-up (typically 10 kohm) close to the MCLR pin (pin 3). For TQFP-64 layout, use 0.5 mm pitch traces with 0.2 mm/0.2 mm width/spacing to clear the leads.
Do not exceed 5.5 V on any VDD pin - the PIC17C756AT-33/PT has no internal voltage regulator and is sensitive to overvoltage on supply rails. Configure unused I/O pins as outputs (not inputs) to avoid floating-pin supply current. Brown-out Detect must be enabled in configuration bits for reliable operation across power transients. For OTP programming, ensure the EPROM programming voltage timing per the datasheet is followed exactly or the device may lock out further programming attempts.
Informations de conformité
RoHS and lead-free status not explicitly stated in verified distributor data; Microchip PIC17C family is OTP EPROM-based and predates widespread RoHS conversion. Conflict minerals compliance per Microchip corporate statement.
