PIC16C662-04E/P - 4MHz 8-bit OTP MCU, 7KB | Microchip
MPN: PIC16C662-04E/P β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.95 | $8.95 |
| 10 | $8.05 | $80.50 |
| 100 | $7.15 | $715.00 |
| 500 | $6.4 | $3,200.00 |
| 1,000 | $5.75 | $5,750.00 |
PIC16C662-04E/P Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O onto one die, enabling compact embedded control in appliances, automotive modules, and industrial subsystems. The PIC16C662 belongs to the mid-range PIC architecture, sitting hierarchically between 8-bit microcontrollers and the broader semiconductor / embedded-processing category.
Key differentiating features include a 14-bit instruction word, only 35 single-word instructions (most executing in 200 ns), integrated Brown-out Detect/Reset, Power-On Reset (POR), Watchdog Timer (WDT), and LED drive capability on selected ports. The RISC Harvard bus architecture and 8-bit data path deliver deterministic interrupt response for real-time control.
Operating from 4.0 V to 6.0 V (4.5 V to 5.5 V typical), the device supports up to 4 MIPS throughput. The OTP program memory makes each unit field-programmable once, ideal for low-to-medium volume production where mask-ROM volume economics are unattractive. Peripherals include an 8-bit timer/counter, capture/compare/PWM, and a synchronous serial port (SSP).
Typical applications include industrial automation controllers, automotive body and climate modules (extended temp grade), appliance control boards, and consumer-electronics interfaces. The 33 I/O pins comfortably drive keypads, LED arrays, and small relays.
Designers should note that the OTP memory cannot be erased, so firmware must be fully validated on a windowed or Flash equivalent before final programming. Decoupling capacitors (0.1 uF) must be placed within 5 mm of VDD/VSS pins, and unused I/O should be configured as outputs to minimize current draw.
This page synthesizes distributor pricing, same-brand drop-in alternatives from the PIC16C6x family, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC16C662-04E/P β 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 PIC16C662-04E/P (same form factor and footprint) β differing in Core Architecture, Instruction Cycle Time, Package.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16C662-04I/P
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$5.07 / Unit
View Datasheet βPIC16F662-I/P
β Drop-Inπ Reference alternative (not in catalog)
PIC16F74-I/P
β Drop-Inπ Reference alternative (not in catalog)
PIC16C662-10E/P
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16F884-E/P
β Drop-Inπ Reference alternative (not in catalog)
PIC16C662-04E/P Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC (Mid-Range) |
| Instruction Word | 14-bit |
| Maximum Clock Frequency | 4 MHz |
| Program Memory | 7 KB (4K x 14) OTP |
| Number of I/O Pins | 33 |
| Supply Voltage Range | 4.0 V to 6.0 V (4.5 V to 5.5 V typical) |
| Instruction Count | 35 |
| Instruction Cycle Time | 200 ns (single-cycle), 400 ns (branch) |
| Peripherals | Brown-out Reset, POR, WDT, LED driver, Timer, CCP, SSP |
| Package | 40-pin PDIP (0.600" / 15.24 mm through-hole) |
| Mounting Type | Through-Hole |
| Operating Temperature Range | -40 C to +125 C (extended grade "E") |
| Temperature Grade | Automotive / Extended |
| ROM Type | OTP (One-Time-Programmable) |
PIC16C662-04E/P Pin Configuration
| Pin 1 | MCLR/VPP β Master Clear (reset) input / programming voltage |
| Pin 2 | RA0/AN0 β Port A bit 0 / analog input 0 |
| Pin 3 | RA1/AN1 β Port A bit 1 / analog input 1 |
| Pin 4 | RA2/AN2 β Port A bit 2 / analog input 2 |
| Pin 5 | RA3/AN3/VREF+ β Port A bit 3 / analog input 3 / voltage reference |
| Pin 6 | RA4/T0CKI β Port A bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4/SS β Port A bit 5 / analog input 4 / SSP slave select |
| Pin 8 | OSC1/CLKIN β Oscillator crystal input / external clock in |
| Pin 9 | OSC2/CLKOUT β Oscillator crystal output / clock out |
| Pin 10 | RC0/T1OSO/T1CKI β Port C bit 0 / Timer1 oscillator out / clock in |
| Pin 11 | RC1/T1OSI/CCP2 β Port C bit 1 / Timer1 oscillator in / CCP2 |
| Pin 12 | RC2/CCP1 β Port C bit 2 / Capture Compare PWM 1 |
| Pin 13 | RC3/SCK/SCL β Port C bit 3 / SPI clock / I2C clock |
| Pin 14 | RC4/SDI/SDA β Port C bit 4 / SPI data in / I2C data |
| Pin 15 | RC5/SDO β Port C bit 5 / SPI data out |
| Pin 16 | RC6/TX/CK β Port C bit 6 / UART TX / clock |
| Pin 17 | RC7/RX/DT β Port C bit 7 / UART RX / data |
| Pin 18 | RD0 β Port D bit 0 |
| Pin 19 | RD1 β Port D bit 1 |
| Pin 20 | RD2 β Port D bit 2 |
| Pin 21 | RD3 β Port D bit 3 |
| Pin 22 | RD4 β Port D bit 4 |
| Pin 23 | RD5 β Port D bit 5 |
| Pin 24 | RD6 β Port D bit 6 |
| Pin 25 | RD7 β Port D bit 7 |
| Pin 26 | RE0/RD β Port E bit 0 / read control |
| Pin 27 | RE1/WR β Port E bit 1 / write control |
| Pin 28 | RE2/CS β Port E bit 2 / chip select |
| Pin 29 | VSS β Ground reference |
| Pin 30 | VDD β Positive supply voltage |
| Pin 31 | RB0/INT β Port B bit 0 / external interrupt |
| Pin 32 | RB1 β Port B bit 1 |
| Pin 33 | RB2 β Port B bit 2 |
| Pin 34 | RB3 β Port B bit 3 |
| Pin 35 | RB4 β Port B bit 4 |
| Pin 36 | RB5 β Port B bit 5 |
| Pin 37 | RB6/PGC β Port B bit 6 / ICSP clock |
| Pin 38 | RB7/PGD β Port B bit 7 / ICSP data |
| Pin 39 | NC β Not connected (per datasheet) |
| Pin 40 | NC β Not connected (per datasheet) |
Typical Applications
PIC16C662-04E/P is suitable for 6 applications: Automotive Body Control Modules, Industrial Automation Controllers, Appliance Control Boards, Consumer Electronics Interface Panels, HVAC and Climate Control, Security and Access Control Panels.
Automotive Body Control Modules
The PIC16C662-04E/P's extended -40 C to +125 C temperature grade and automotive qualification make it well suited to body-electronics ECUs that drive mirrors, locks, and lighting. With 33 digital I/O, the MCU can scan keypads, multiplex LEDs, and read switches directly, while the on-chip WDT and Brown-out Reset handle the noisy 12 V automotive environment. The 200 ns instruction cycle supports debounce and PWM tasks in real time. Place 0.1 uF decoupling close to VDD/VSS and use optocouplers for any 12 V load switching.
Recommended
Industrial Automation Controllers
In industrial PLCs and sensor-interface boards, the PIC16C662-04E/P provides 33 I/O lines that can drive relays, read limit switches, and interface 4-20 mA loops through external conditioning. The OTP memory locks firmware to prevent unauthorized field modification, while the RISC core executes deterministic scan loops within microseconds. Brown-out detection protects against the voltage sags common on long factory wiring runs. Use the CCP and SSP peripherals for PWM valve control and SPI sensor polling respectively.
Recommended
Appliance Control Boards
White-goods control boards (washers, dishwashers, ovens) benefit from the PIC16C662-04E/P's integrated LED drive, 33 I/O, and timer/counter peripherals that handle motor triac drive, user-panel scanning, and temperature sensor polling. The 4 MHz clock keeps EMI low compared to faster MCUs, simplifying CE/UL compliance. The 5 V supply envelope matches common appliance power rails. OTP memory prevents firmware tampering and ensures field units ship with locked behavior.
Recommended
Consumer Electronics Interface Panels
User-interface panels for AV receivers, HVAC thermostats, and home automation gateways use the PIC16C662-04E/P to scan keypads, drive 7-segment or matrix LED displays, and bridge to a host processor via UART or SPI. The PIC's 35-instruction RISC core is easy to program in assembly or C, accelerating time-to-market for cost-sensitive consumer products. The 33 I/O accommodate 4x4 keypads plus dedicated LED sink lines without external drivers.
Recommended
HVAC and Climate Control
The PIC16C662-04E/P's extended temperature grade suits HVAC controllers exposed to attic and outdoor-cabinet conditions. The MCU can multiplex temperature inputs from NTC thermistors, drive triac-based fan speed control via PWM (CCP module), and communicate with indoor units over UART. OTP memory locks calibrated firmware and protects against unauthorized reflash. Brown-out Reset is essential for handling compressor inrush that sags the supply rail.
Recommended
Security and Access Control Panels
Door controllers, alarm panels, and access-control keypads use the PIC16C662-04E/P to scan keypads, drive buzzers and LEDs, and supervise reed-switch zones. The WDT catches firmware lockups, while OTP memory ensures the security logic cannot be reflashed in the field. The 4 MHz clock gives 5 ms instruction loops that comfortably debounce mechanical keypresses without missing events. Use external EEPROM or serial FRAM for event-log persistence.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C662-04E/P β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C662-04I/P | PIC16F662-I/P | PIC16F74-I/P | PIC16C662-10E/P | PIC16F884-E/P |
|---|---|---|---|---|---|---|
| Package | 40-PDIP | 40-PDIP - same | 40-PDIP - same | 40-PDIP - same | 40-PDIP - same | 40-PDIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Frequency | 4 MHz | 4 MHz | 20 MHz | 20 MHz | 10 MHz | 20 MHz |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB Flash | 4 KB Flash | 7 KB OTP | 7 KB Flash |
| Memory Type | OTP | OTP | Flash | Flash | OTP | Flash |
| Temperature Grade | -40 to +125 C (Extended) | -40 to +85 C (Industrial) | -40 to +85 C (Industrial) | -40 to +85 C (Industrial) | -40 to +125 C (Extended) | -40 to +125 C (Extended) |
| Number of I/O Pins | 33 | 33 | 33 | 33 | 33 | 36 |
| Supply Voltage | 4.0 to 6.0 V | 4.0 to 6.0 V | 2.0 to 5.5 V | 2.0 to 5.5 V | 4.0 to 6.0 V | 2.0 to 5.5 V |
| Brown-out Reset | Yes | Yes | Yes | Yes | Yes | Yes |
| Watchdog Timer | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Extended automotive temperature grade in standard SKU (vs PIC16C662-04I/P)
- 7 KB OTP program memory with 33 I/O at 4 MHz clock grade (vs PIC16F74-I/P)
- Same-brand drop-in availability across OTP and Flash variants (vs PIC16F884-E/P)
Design Notes
Place a 0.1 uF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 30) and a bulk 10 uF electrolytic near the IC. The PIC16C662-04E/P can source/sink up to 25 mA per pin, but the total port current is limited; avoid tying multiple LEDs to the same VDD rail without current-limiting resistors. Route the MCLR line directly to the reset circuit with a 10 kohm pull-up to VDD.
Estimated: at 4 MHz clock and VDD = 5.0 V, supply current is typically 2-5 mA with all I/O floating. Adding LED loads at 10 mA total and analog peripherals active can push this to ~15 mA. The extended temperature grade means derate supply current at +125 C by ~20 percent. Always enable Brown-out Reset to protect Flash/OTP integrity during voltage sags.
Do not leave unused I/O pins floating - configure them as outputs or enable the internal weak pull-ups to prevent shoot-through and spurious interrupts. The MCLR pin must NOT be left floating; tie through a resistor to VDD. When programming OTP, ensure VPP rises monotonically to 13 V within the datasheet-specified rise time, or the programming cycle will fail silently and leave the part unprogrammed.
Compliance Information
RoHS and REACH status not explicitly stated in provided data. Lead-free assumed for PDIP package family. AEC-Q100 not separately qualified - extended temp grade "/E" suffix is automotive-style but not formal AEC-Q100.
