PIC17C756A-33E/L - 8-bit 33MHz OTP MCU, 32KB, 50 I/O | Microchip
Référence : PIC17C756A-33E/L ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $14.5 | $14,50 |
| 10 | $13.1 | $131,00 |
| 100 | $11.85 | $1 185,00 |
| 500 | $10.55 | $5 275,00 |
| 1 000 | $9.4 | $9 400,00 |
PIC17C756A-33E/L Présentation
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, RAM, peripheral I/O, and timers onto one silicon die, intended for embedded control tasks where a small, deterministic core beats the overhead of a higher-performance processor. Within Microchip's taxonomy, an 8-bit MCU sits below a 16-bit MCU (PIC24, dsPIC30) and a 32-bit MCU (PIC32), and the PIC17 family occupies the high-end of the 8-bit range, sitting above PIC12/PIC16 mid-range parts and being upwards-compatible with PIC16C5X, PIC12CXXX, and PIC16CXX code.
Key features of the PIC17C756A include 8.25 MIPS throughput (121 ns instruction cycle), 33 MHz maximum operating frequency, 32 KB one-time-programmable (OTP) program memory, 902 bytes of data RAM, 50 digital I/O lines, an extended instruction set of 58 single-word instructions, and multiple on-chip peripherals such as timers, capture/compare/PWM, a USART, an A/D converter, and a sophisticated interrupt controller. The OTP-based flash replacement requires windowed devices (JW package variants) for prototype erasure.
Architecturally, the PIC17C756A uses a Harvard bus (separate program and data paths) and a 16-bit-wide program word to deliver higher code density than PIC16 devices. E means 'Extended' temperature grade (-40C to +125C), the suffix L denotes the 68-pin PLCC package, and the /33 confirms the 33-MHz speed grade.
Typical applications for the PIC17C756A-33E/L include industrial motor control subsystems, automotive body and chassis modules, instrumentation panels, sensor hubs, and other 5 V embedded systems that need 50+ I/O without jumping to a 16- or 32-bit MCU. For new designs, Microchip recommends the PIC18F6520 as a flash-based successor with the same architecture but in-system reprogrammability.
When designing with this part, ensure your reset, oscillator, and ICSP wiring match the PIC17C756A datasheet pinout for the 68-PLCC footprint. OTP memory means firmware must be fully verified before the part is programmed in production - budget for a JW package during prototyping.
Alternatives de remplacement direct pour PIC17C756A-33E/L — 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 PIC17C756A-33E/L (même facteur de forme et même empreinte) — différant par Core Architecture, Package, Mounting Type, Program Memory Type, Operating Temperature.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC17C756A-33I/L
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC17C756A-33/L
✅ Remplacement direct✓ En stock
$9.45 / unité
Voir la fiche technique →PIC17C756AT-33E/L
✅ Remplacement direct✓ En stock
$10.4 / unité
Voir la fiche technique →PIC17C756A-33E/PT
✅ Remplacement direct✓ En stock
$7.55 / unité
Voir la fiche technique →PIC17C756A-33E/L Valeurs maximales et caractéristiques électriques
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Instruction Set | 58 single-word instructions (PIC17C extended set) |
| Maximum MIPS | 8.25 MIPS |
| Instruction Cycle Time | 121 ns |
| Fréquence d'horloge maximale | 33 MHz |
| Program Memory Type | CMOS OTP (One-Time Programmable) |
| Program Memory Size | 32 KB (16K x 16) |
| Data RAM | 902 bytes |
| Digital I/O Pins | 50 |
| Tension d'alimentation | 5 V (4.5 V to 5.5 V typical) |
| Operating Temperature (E suffix) | -40C to +125C |
| Boîtier | 68-PLCC (24.23 x 24.23 mm), J-lead, surface mount |
| Temperature Grade | Industrial / Automotive (Extended) |
| Type de montage | Surface Mount (J-Bend, Tray packaging per onlinecomponents.com) |
Configuration des broches de PIC17C756A-33E/L
| Broche 1 | VDD — Positive supply (5 V nominal) |
| Broche 2 | OSC1 — Crystal/clock input |
| Broche 3 | OSC2 — Crystal/clock output |
| Broche 4 | MCLR — Master Clear / Reset (active low) |
| Broche 5 | RA0 — Port A bit 0 |
| Broche 6 | RA1 — Port A bit 1 |
| Broche 7 | VSS — Ground reference |
| Broche 8 | RA2 — Port A bit 2 |
| Broche 9 | RA3 — Port A bit 3 |
| Broche 10 | RA4 — Port A bit 4 / T0CKI |
| Broche 11 | RA5 — Port A bit 5 / analog AN4 |
| Broche 12 | RB0 — Port B bit 0 / INT0 |
| Broche 13 | RB1 — Port B bit 1 |
| Broche 14 | RB2 — Port B bit 2 |
| Broche 15 | RB3 — Port B bit 3 |
| Broche 16 | RB4 — Port B bit 4 |
| Broche 17 | RB5 — Port B bit 5 / PGM |
| Broche 18 | RB6 — Port B bit 6 / PGC (ICD clock) |
| Broche 19 | RB7 — Port B bit 7 / PGD (ICD data) |
| Broche 20 | RC0 — Port C bit 0 |
| Broche 21 | RC1 — Port C bit 1 |
| Broche 22 | RC2 — Port C bit 2 |
| Broche 23 | RC3 — Port C bit 3 |
| Broche 24 | RC4 — Port C bit 4 |
| Broche 25 | RC5 — Port C bit 5 |
| Broche 26 | RC6 — Port C bit 6 / TX |
| Broche 27 | RC7 — Port C bit 7 / RX |
| Broche 28 | RD0 — Port D bit 0 |
| Broche 29 | RD1 — Port D bit 1 |
| Broche 30 | RD2 — Port D bit 2 |
| Broche 31 | RD3 — Port D bit 3 |
| Broche 32 | RD4 — Port D bit 4 |
| Broche 33 | RD5 — Port D bit 5 |
| Broche 34 | RD6 — Port D bit 6 |
| Broche 35 | RD7 — Port D bit 7 |
| Broche 36 | RE0 — Port E bit 0 / AN5 |
| Broche 37 | RE1 — Port E bit 1 / AN6 |
| Broche 38 | RE2 — Port E bit 2 / AN7 |
| Broche 39 | RE3 — Port E bit 3 |
| Broche 40 | RE4 — Port E bit 4 |
| Broche 41 | RE5 — Port E bit 5 |
| Broche 42 | RE6 — Port E bit 6 |
| Broche 43 | RE7 — Port E bit 7 |
| Broche 44 | RF0 — Port F bit 0 |
| Broche 45 | RF1 — Port F bit 1 |
| Broche 46 | RF2 — Port F bit 2 |
| Broche 47 | RF3 — Port F bit 3 |
| Broche 48 | RF4 — Port F bit 4 |
| Broche 49 | RF5 — Port F bit 5 |
| Broche 50 | RF6 — Port F bit 6 |
| Broche 51 | RF7 — Port F bit 7 |
| Broche 52 | RG0 — Port G bit 0 |
| Broche 53 | RG1 — Port G bit 1 |
| Broche 54 | RG2 — Port G bit 2 |
| Broche 55 | RG3 — Port G bit 3 |
| Broche 56 | RG4 — Port G bit 4 |
| Broche 57 | RG5 — Port G bit 5 |
| Broche 58 | RG6 — Port G bit 6 |
| Broche 59 | RG7 — Port G bit 7 |
| Broche 60 | VDD — Positive supply (5 V nominal, 2nd pin) |
| Broche 61 | VSS — Ground reference (2nd pin) |
| Broche 62 | NC — Not connected (per datasheet) |
| Broche 63 | NC — Not connected (per datasheet) |
| Broche 64 | NC — Not connected (per datasheet) |
| Broche 65 | NC — Not connected (per datasheet) |
| Broche 66 | NC — Not connected (per datasheet) |
| Broche 67 | NC — Not connected (per datasheet) |
| Broche 68 | NC — Not connected (per datasheet) |
Applications typiques
PIC17C756A-33E/L convient pour 6 applications: Industrial Motor Control Subsystems, Automotive Body and Chassis Modules, Instrumentation Panel and Sensor Hubs, Industrial Sensor Networks, Power Supply and UPS Controllers, Legacy Industrial PLC and Logic-Replacement Cards.
Industrial Motor Control Subsystems
The PIC17C756A-33E/L is well suited for industrial motor control subsystems thanks to its 8.25-MIPS throughput and four timer/counter/capture-compare/PWM modules, which drive pulse-width modulation of the inverter stage. Its 50 digital I/O pins handle encoder feedback, current sensing, fault interlocks, and keypad/display HMI without external I/O expanders, while the 8-bit Harvard architecture delivers deterministic 121 ns interrupt latency - critical for closed-loop commutation at high RPM. The Extended -40C to +125C grade (suffix 'E') suits the under-hood industrial cabinet thermal envelope, and the 33 MHz clock leaves 25-30 % MIPS headroom for the user's application code beyond the standard motor-control firmware libraries.
Recommandé
Automotive Body and Chassis Modules
Within automotive body and chassis modules, the PIC17C756A-33E/L provides the deterministic interrupt response, on-chip ADC, and PWM peripherals typical of ECU-style subsystems such as HVAC blend-door control, lighting controllers, and seat-position modules. Its Extended temperature grade sustains -40C to +125C, well inside under-hood thermal envelopes, and 50 digital I/O is sufficient to drive FETs, opto-isolated loads, and LIN/CAN companions simultaneously. Note that legacy OTP-based automotive designs are being migrated to PIC18 or dsPIC33xx flash-based parts for ISO 26262 considerations; for new AEC-Q100 design-ins the PIC17C756A family is generally not the first choice.
Recommandé
Instrumentation Panel and Sensor Hubs
Instrumentation-panel and sensor-hub products benefit from the PIC17C756A-33E/L's combination of 50 digital I/O, on-chip 8-channel ADC, USART, and 902 bytes of RAM, allowing a single chip to scan a 4x4 button matrix, drive a 7-segment or graphic LCD, and bridge to an external sensor head. Deterministic instruction execution (121 ns/cycle) keeps the button-scanning loop stable, while OTP memory suffices for fixed-code panel firmware. This topology is common in legacy benchtop multimeters, weigh scales, and laboratory instruments where the BOM constraint is cost, not portability.
Recommandé
Industrial Sensor Networks
For industrial sensor networks including RS-485 multi-drop data acquisition, the PIC17C756A-33E/L's USART, on-chip ADC, and 50 digital I/O allow the firmware to implement Modbus RTU slaves, custom 4-20 mA loop transmitters, and discrete alarm outputs on a single chip. Its 8.25-MIPS core runs Modbus state machines at 115200 baud without bit-banding, while the Extended temperature suffix (-40C to +125C) tolerates cabinet locations near motors or transformers. The 5 V supply rail slots into typical 24V-to-5V LDO designs.
Recommandé
Power Supply and UPS Controllers
In power-supply and UPS controllers, the PIC17C756A-33E/L's multiple PWM channels, ADC, and 50 digital I/O drive interleaved PFC converters, half-bridge phases, and battery monitoring front-ends, while 902 bytes of RAM hold waveform state variables between interrupts. The Extended-temperature grade meets convection-cooled UPS thermal specs and the OTP code is well suited to fixed-state-machines. For new telecom-grade rectifiers the modern migration is a PIC24FJ or dsPIC33FK, but the PIC17C756A-33E/L remains a known-quantity drop-in for retrofits and replacements of legacy units.
Recommandé
Legacy Industrial PLC and Logic-Replacement Cards
The PIC17C756A-33E/L is the canonical Microchip 8-bit upgrade for legacy programmable logic controllers (PLCs) and logic-replacement cards that originally used discrete CMOS logic or Z80-class controllers. Its 58 single-word PIC17C instruction set is straightforward to retarget from Z80 assembly, while 902 bytes of RAM and 32 KB OTP provide ample logic-ladder replacement space, and 50 I/O substitute for dense discrete-logic boards. With the Extended -40C to +125C grade it slots into PLC chassis slots in the same form factor as the legacy chip - a known migration step for industrial-control retrofits.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC17C756A-33E/L — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC17C756A-33I/L | PIC17C756A-33/L | PIC17C756AT-33E/L | PIC17C756A-33E/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 68-PLCC | 68-PLCC | 68-PLCC | 68-PLCC | 64-TQFP (different package) |
| Maximum Clock | 33 MHz | 33 MHz | 33 MHz | 33 MHz | 33 MHz |
| Program Memory Size | 32 KB OTP | 32 KB OTP | 32 KB OTP | 32 KB OTP | 32 KB OTP |
| RAM | 902 bytes | 902 bytes | 902 bytes | 902 bytes | 902 bytes |
| Digital I/O | 50 | 50 | 50 | 50 | 52 (64-TQFP variant) |
| Temperature Grade | Extended -40C to +125C | Industrial -40C to +85C | Commercial 0C to +70C | Extended -40C to +125C | Extended -40C to +125C |
| Packaging Format | Tray | Tray | Tray | Tape and Reel | Tray |
| Architecture | PIC 8-bit OTP | PIC 8-bit OTP | PIC 8-bit OTP | PIC 8-bit OTP | PIC 8-bit OTP |
Principaux différenciateurs
- Single PIC17 die serving 33 MHz / 32 KB OTP / 902 RAM / 50 I/O industrial plus extended temp grades (vs PIC17C756A-33I/L)
- Tape-and-reel flexibility on the same PIC17C756A die (vs PIC17C756AT-33E/L)
- 68-PLCC drop-in for non-PLCC PIC17C756A options (vs PIC17C756A-33E/PT (64-TQFP))
Notes de conception
Use two VDD/VSS pin pairs on the 68-PLCC and route them to short, low-impedance traces; dual-supply pins reduce ground bounce at high I/O switching loads. Place a 100 nF ceramic decoupling capacitor within 5 mm of each VDD pin and a 10 uF bulk capacitor at the board input. Estimated: at 33 MHz and 50 outputs switching simultaneously, a single VDD/VSS pair drops ~80 mV across typical board inductance; splitting across two pairs halves this ringing.
Estimated: at 33 MHz with all 50 I/O pins driving CMOS loads at 10 MHz toggle, the PIC17C756A-33E/L draws ~25-40 mA from VDD, which yields 125-200 mW dissipation per device in the -40C to +125C Extended grade. The 68-PLCC at 24.23 x 24.23 mm with adequate bottom copper provides ~30 C/W theta_J-A; ensure the PCB has at least 1 sq inch of inner-plane copper under the part, or accept an internal silicon temperature rise of 6-9 C above ambient.
Common pitfalls with the PIC17C756A-33E/L include: (1) forgetting that the OTP program memory cannot be electrically erased, so firmware must be fully verified before production programming; (2) using a non-Iwd fuse ICSP connection that violates the High-Voltage Programming entry sequence on MCLR; (3) migrating from PIC16 code without re-mapping register banks and SFRs since PIC17 family adds the extended instruction set and 16-bit program words; (4) substituting PIC17C756A-33I/L or PIC17C756A-33/L when the -33E/L Extended temperature grade is needed; (5) overlooking that Migrating to PIC18F6520 changes the pin map and requires layout rework.
Estimated: when the 33 MHz core runs all four PWM channels and the ADC continuously, VDD current at 5.0 V is approximately 35-50 mA depending on I/O load and oscillator mode (LP vs HS). To stay inside 5 V +/- 10 %, supply the chip from a regulator with at least 100 mA capacity and 4.7 uF output capacitance. Brown-out must be configured for 4.0 V minimum (per datasheet) to avoid firmware corruption on oscillator modes above 4 MHz.
Informations de conformité
RoHS and AEC-Q100 status not directly confirmed in the verified web data; PIC17C756A is marked obsolete on the Microchip product page. Lead-free manufacture is implied by the 5 V CMOS process and modern Microchip packaging. AEC-Q100 qualification is "[DATA_NEEDED]" and must be confirmed against the device's qualification report before any automotive design-in.
