PIC16C662T-10E/PQ - 8-Bit OTP MCU, 7KB, 33 I/O | Microchip | MQFP-44
MPN: PIC16C662T-10E/PQ ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.85 | $9.85 |
| 10 | $8.92 | $89.20 |
| 100 | $7.45 | $745.00 |
| 500 | $6.2 | $3,100.00 |
| 1,000 | $5.4 | $5,400.00 |
PIC16C662T-10E/PQ Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/EPROM/Flash/OTP), data RAM, I/O peripherals, and timers onto one die. PIC microcontrollers use a Harvard RISC architecture with a small, fixed instruction set optimized for deterministic, single-cycle execution (excluding branches). They sit within the broader category of microcontrollers -> embedded processors -> semiconductors. OTP variants like the PIC16C662 are typically chosen for low-to-medium volume production where the cost of Flash reprogrammability is not justified, but field-programmability during prototyping is still required.
Key features of the PIC16C662T-10E/PQ include integrated analog peripherals (two on-chip comparators and an 8-bit ADC reference per the PIC16C66x family), Brown-Out Detect (BOD) and Power-On Reset (POR) for robust supply supervision, a Watchdog Timer (WDT) for runaway code recovery, and a programmable 8-bit prescaler shared between Timer0 and the WDT. The "E" suffix indicates the Extended industrial temperature grade of -40C to +125C, and the "T" denotes Tape and Reel packaging.
The 44-pin MQFP package (0.80 mm terminal pitch) exposes up to 33 GPIO pins along with dedicated oscillator, MCLR, VDD/VSS, and analog input pins. Peripheral interfaces are software-controlled through Special Function Registers (SFRs), and code development is supported by the MPASM assembler and the PICmicro Mid-Range C Compiler under MPLAB IDE. The CMOS process gives the part very low power consumption, suiting it to both battery-backed and line-powered appliances.
Typical applications include consumer appliance control panels, low-end motor control boards, security alarm keypads, automotive body electronics (non-safety), industrial sensor interfaces, and white-goods user-interface modules. The combination of OTP memory, BOD/POR, and analog comparators lets a single chip replace several discrete components in simple embedded designs.
Designers should note that the PIC16C662 OTP cannot be erased or rewritten; firmware must be fully verified before programming. The 4.0V to 6.0V VDD range makes the part incompatible with 3.3V-only systems without a level shifter. Engineers migrating to new designs are encouraged to consider Flash-based PIC16F equivalents for lower total cost of ownership.
This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet, helping sourcing engineers and PCB designers evaluate the PIC16C662T-10E/PQ quickly.
Drop-in alternatives for PIC16C662T-10E/PQ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC16C662T-10E/PQ (same form factor and footprint) — differing in Operating Temperature, Package, RoHS Status, Program Memory Size, Program Memory Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C662-10/PQ
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C662-20/PQ
✅ Drop-In✓ In Stock
$9.75 / Unit
View Datasheet →PIC16C662T-04E/PQ
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C662-20E/PT
✅ Drop-In✓ In Stock
$8.2 / Unit
View Datasheet →PIC16C662-20I/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$5.45 / Unit
View Datasheet →PIC16C662T-10E/PQ Maximum Ratings & Electrical Characteristics
| Core | 8-bit PIC16C Mid-Range RISC |
| Architecture | Harvard RISC, CMOS |
| Program Memory | 7 KB (4096 words x 14-bit) OTPROM |
| Data RAM | 176 bytes |
| Maximum Clock Frequency | 10 MHz |
| I/O Pins | 33 |
| Supply Voltage (VDD) | 4.0 V to 6.0 V |
| On-chip Comparators | 2 |
| Brown-Out Detect (BOD) | Yes |
| Power-On Reset (POR) | Yes |
| Watchdog Timer (WDT) | Yes |
| Package | MQFP-44 (PQ) 0.80 mm pitch |
| Operating Temperature | -40 C to +125 C (Extended, "E") |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant (per distributor listings) |
| Packaging Form | Tape and Reel ("T") |
PIC16C662T-10E/PQ Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active low |
| Pin 2 | OSC1 — Oscillator input or external clock |
| Pin 3 | OSC2 — Oscillator output (crystal mode) |
| Pin 4 | RA0 — Port A bit 0 / analog input |
| Pin 5 | RA1 — Port A bit 1 / analog input |
| Pin 6 | RA2 — Port A bit 2 / analog input |
| Pin 7 | RA3 — Port A bit 3 / analog input |
| Pin 8 | RA4 — Port A bit 4 / T0CKI |
| Pin 9 | RA5 — Port A bit 5 / SS |
| Pin 10 | VSS — Ground reference |
| Pin 11 | VDD — Positive supply (4.0 V to 6.0 V) |
| Pin 12 | RB0 — Port B bit 0 / INT |
| Pin 13 | RB1 — Port B bit 1 |
| Pin 14 | RB2 — Port B bit 2 |
| Pin 15 | RB3 — Port B bit 3 |
| Pin 16 | RB4 — Port B bit 4 |
| Pin 17 | RB5 — Port B bit 5 |
| Pin 18 | RB6 — Port B bit 6 / PGC |
| Pin 19 | RB7 — Port B bit 7 / PGD |
| Pin 20 | VSS — Ground reference |
| Pin 21 | VDD — Positive supply (4.0 V to 6.0 V) |
| Pin 22 | RC0 — Port C bit 0 |
| Pin 23 | RC1 — Port C bit 1 |
| Pin 24 | RC2 — Port C bit 2 / CCP1 |
| Pin 25 | RC3 — Port C bit 3 |
| Pin 26 | RC4 — Port C bit 4 |
| Pin 27 | RC5 — Port C bit 5 |
| Pin 28 | RC6 — Port C bit 6 / TX |
| Pin 29 | RC7 — Port C bit 7 / RX |
| Pin 30 | VSS — Ground reference |
| Pin 31 | VDD — Positive supply (4.0 V to 6.0 V) |
| Pin 32 | RD0 — Port D bit 0 |
| Pin 33 | RD1 — Port D bit 1 |
| Pin 34 | RD2 — Port D bit 2 |
| Pin 35 | RD3 — Port D bit 3 |
| Pin 36 | RD4 — Port D bit 4 |
| Pin 37 | RD5 — Port D bit 5 |
| Pin 38 | RD6 — Port D bit 6 |
| Pin 39 | RD7 — Port D bit 7 |
| Pin 40 | VSS — Ground reference |
| Pin 41 | VDD — Positive supply (4.0 V to 6.0 V) |
| Pin 42 | RE0 — Port E bit 0 / RD |
| Pin 43 | RE1 — Port E bit 1 / WR |
| Pin 44 | RE2 — Port E bit 2 / CS |
Typical Applications
PIC16C662T-10E/PQ is suitable for 6 applications: Consumer Appliance Control, Automotive Body Electronics (Non-Safety), Industrial Sensor Interface, Security Alarm Keypads, Low-End Motor Control, White-Goods User Interface Module.
Consumer Appliance Control
The PIC16C662T-10E/PQ is well suited to white-goods and small-appliance control because it integrates two analog comparators, BOD/POR, and 33 GPIO into a single 5 V CMOS chip, eliminating the need for an external supervisor and reducing BOM cost. Its 7 KB OTPROM and 176 B RAM are sufficient for washing-machine, dishwasher, and microwave user-interface state machines, while the 10 MHz core gives 100 ns instruction cycles that easily handle 1 ms control loops. The Extended -40 C to +125 C temperature grade tolerates the heat inside appliance enclosures, and the MQFP-44 SMD package suits high-volume automated assembly lines. Designers typically pair the MCU with a triac-driving opto-isolator stage for zero-cross mains switching and a 4x4 key-matrix scan on PortB.
Recommended
Automotive Body Electronics (Non-Safety)
In non-safety automotive body modules such as door-lock controllers, seat-position switches, mirror-adjust keypads, and HVAC blend-door actuators, the PIC16C662T-10E/PQ is favored for its Extended -40 C to +125 C grade, Brown-Out Detect, and Watchdog Timer that satisfy typical OEM environmental specs. The 33 I/O lines support multiple switch-sensing inputs, H-bridge PWM channels via the CCP module, and LIN/CAN-ready UART paths. The 5 V native supply simplifies integration with 12 V post-regulated rails common in body ECUs. AEC-Q100 qualification is NOT claimed on this part, so it is restricted to body-electronics (non-safety) per most OEM component lists. For safety-critical ECUs, use an AEC-Q100-qualified MCU instead.
Recommended
Industrial Sensor Interface
The PIC16C662T-10E/PQ serves as a low-cost front-end MCU for industrial sensor-interface boards reading 4-20 mA loops, NTC thermistors, and discrete limit switches. Its two on-chip comparators can implement window-discriminator thresholds without an external op-amp, and the 10 MIPS performance allows 100 Hz sensor sampling while still servicing a Modbus RTU slave over UART. The 4.0 V to 6.0 V VDD range aligns with 5 V industrial backplanes, and the 33 I/O lines give ample headroom for keypad input plus indicator LED drivers. The Extended temperature grade and BOD/POR provide the field reliability expected in factory-floor installations.
Recommended
Security Alarm Keypads
In PIR-based intrusion alarm keypads, the PIC16C662T-10E/PQ scans a 4x4 matrix, drives a 7-segment status display, communicates with the main control panel over a polled UART, and supervises battery-backed power with BOD/POR. The 7 KB OTPROM stores panel protocol state tables, the 176 B RAM holds keypad debounce buffers, and the Watchdog Timer guards against keypad-lockup faults. Its low CMOS quiescent current and 5 V supply suit battery-backed alarm installations. The Extended -40 C to +125 C rating lets the same firmware build serve indoor and outdoor keypad SKUs.
Recommended
Low-End Motor Control
The PIC16C662T-10E/PQ can drive small BLDC or brushed-DC motor control boards in fans, pumps, and small appliances by using the CCP module for PWM generation, the on-chip comparators for back-EMF or current-sense feedback, and the 10 MHz core for closed-loop control. With 33 I/O pins, the MCU can run a 3-phase low-side gate driver directly, leaving just a few pins for fault input, speed pot, and UART diagnostics. The Extended -40 C to +125 C rating lets the same firmware support both indoor fans and outdoor pump enclosures, and the OTPROM prevents firmware tampering in commercial products.
Recommended
White-Goods User Interface Module
The PIC16C662T-10E/PQ is a strong fit for white-goods user-interface modules (UIMs) such as washing-machine, oven, and refrigerator front panels where it scans capacitive or resistive touch keypads, drives an LCD or LED matrix, and exchanges commands with the main appliance controller over UART or I2C. Its 33 GPIO easily support 16-key keypads plus 7-segment or character-LCD drive, while the two analog comparators handle knob-encoder or NTC temperature channels. The Extended -40 C to +125 C rating covers the thermal envelope inside an oven door, and the MQFP-44 SMD package is compatible with high-volume reflow assembly. Firmware is locked into OTPROM, preventing field IP leakage on consumer appliances.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C662T-10E/PQ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C662-10/PQ | PIC16C662-20/PQ | PIC16C662T-04E/PQ | PIC16C662-20E/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | MQFP-44 (PQ) | MQFP-44 (PQ) | MQFP-44 (PQ) | MQFP-44 (PQ) | TQFP-44 (PT) |
| Max Clock Frequency | 10 MHz | 10 MHz | 20 MHz | 4 MHz | 20 MHz |
| Program Memory | 7 KB OTPROM | 7 KB OTPROM | 7 KB OTPROM | 7 KB OTPROM | 7 KB OTPROM |
| Data RAM | 176 B | 176 B | 176 B | 176 B | 176 B |
| I/O Pins | 33 | 33 | 33 | 33 | 33 |
| Operating Temperature | -40 C to +125 C (Extended) | 0 C to +70 C (Commercial) | 0 C to +70 C (Commercial) | -40 C to +125 C (Extended) | -40 C to +125 C (Extended) |
| Supply Voltage | 4.0 V to 6.0 V | 4.0 V to 6.0 V | 4.0 V to 6.0 V | 4.0 V to 6.0 V | 4.0 V to 6.0 V |
| Packaging Form | Tape & Reel | Tray | Tray | Tape & Reel | Tray |
Key Differentiators
- Extended -40 C to +125 C industrial temperature grade (vs PIC16C662-10/PQ)
- 10 MHz clock with 5 V native supply (vs PIC16C662T-04E/PQ)
- Same-package MQFP-44 (PQ) family compatibility (vs PIC16C662-20E/PT (TQFP-44 PT))
Design Notes
The PIC16C662T-10E/PQ operates from 4.0 V to 6.0 V, so a 5 V LDO such as the LM7805 or MCP1700 must precede the VDD pin. Place a 100 nF decoupling capacitor within 5 mm of each VDD pin (the MQFP-44 has 4 VDD pins: 11, 21, 31, 41) and a bulk 10 uF tantalum at the regulator output. Brown-Out Detect (BOD) is enabled by configuration fuse and holds the part in reset until VDD rises above the BOD threshold, preventing code execution at marginal supply voltages that can corrupt the OTPROM state machine.
OTPROM cannot be erased, so any code change requires a new part and a new production build. Always validate firmware on a PIC16F equivalent (or windowed PIC16CW) before committing to OTP volume. Also note the configuration bits are OTP: once programmed they cannot be changed, so lock down watchdog, BOD, oscillator, and code-protect settings during the very first programming pass to avoid costly rework.
Estimated: at 10 MHz, 5 V VDD, and CMOS I/O toggling, the core draws roughly 5 mA. With four VDD pins the package dissipates approximately 25 mW, well within the MQFP-44 thermal envelope of about 1 W. At -40 C to +125 C ambient, no heatsink is needed. However, the Extended grade silicon has higher quiescent current at hot temperatures; derate the system clock or disable unused peripherals to stay within brown-out trip accuracy.
Route the MCLR pin to a pull-up resistor and a 100 nF capacitor; do not leave MCLR floating. Place the 4 MHz to 10 MHz crystal or resonator within 10 mm of OSC1/OSC2, and guard the oscillator traces with a ground ring to keep EMI and ESD from disturbing the clock. Use a 4-layer PCB with a continuous ground plane if the design is for an industrial or automotive environment, and place a ferrite bead on each cable leaving the board to suppress conducted noise.
Compliance Information
ROHS3 compliant per distributor listings (Jotrin, Kynix, Ariat-Tech, Ampheo). Not AEC-Q100 qualified - this part is restricted to non-safety automotive body electronics and industrial/commercial use only.
