PIC16C662-04E/L - 4MHz 8-bit OTP MCU, 7KB, 44-PLCC | Microchip
MPN: PIC16C662-04E/L ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $13.5 | $13.50 |
| 10 | $12.2 | $122.00 |
| 100 | $10.95 | $1,095.00 |
| 500 | $9.85 | $4,925.00 |
| 1,000 | $8.95 | $8,950.00 |
PIC16C662-04E/L Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces onto one silicon die. Within the broader semiconductor taxonomy, an MCU belongs to the digital IC family, which itself sits inside the integrated circuits hierarchy; the PIC® 16C line specifically is built on a RISC Harvard architecture with separate program and data buses, and OTP program memory means the firmware is permanently written at the factory or by a programming tool and cannot be electrically erased thereafter. Compared with modern flash-based MCUs, OTP parts trade off field re-programmability for a lower unit cost, making them typical choices for high-volume, code-stable applications.
The PIC16C662-04E/L is built around a 14-bit instruction word and executes every instruction in a single 200 ns cycle at 4 MHz; only 35 single-word instructions are required to cover the entire instruction set, which simplifies assembler programming and reduces code density. The '04E' suffix designates a 4 MHz maximum clock with the enhanced (-40 °C to +125 °C) industrial/automotive temperature range, while the '/L' package code denotes the 44-pin PLCC J-lead (PLCC-44) format. The device integrates a 10-bit successive-approximation ADC, dual analog comparators, a USART, an SSP/SPI/I²C master/slave port, a parallel slave port, three timer/counters (8-bit and 16-bit), 33 digital I/O lines, a watchdog timer, and a hardware brown-out reset for automotive-class robustness.
Typical automotive and industrial uses include dashboard clusters, climate-control panels, body-electronics modules, sensor-conditioning front-ends, and simple user-interface controllers. Its integrated ADC and comparator peripherals allow direct connection to thermistors, potentiometers, and 0-5 V analog sensors without external signal conditioning. The wide operating temperature window and proven OTP architecture also make it a fit for low-cost point-of-sale terminals, appliance controllers, and instrument-cluster segments where firmware stability over a 10-year production run outweighs the need for in-system flash updates.
When designing with this part, observe the OTP-programming model: code must be committed by the time the device leaves the factory or by a third-party programmer before PCB assembly; there is no in-application rewrite path. Also reserve budget for the PLCC-44 socket footprint on the PCB, since J-lead parts are typically socketed in low-volume builds to allow rework. According to the Microchip PIC16C662 datasheet, the device supports 5 V operation and the enhanced temperature grade ensures the MCU remains within spec across automotive under-hood and cabin environments.
Drop-in alternatives for PIC16C662-04E/L — 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/L (same form factor and footprint) — differing in Package, Program Memory Type, ADC, Core Architecture, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C65B-04E/L
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$10.85 / Unit
View Datasheet →PIC16C64A-04E/L
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16C65A-04E/L
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$11.2 / Unit
View Datasheet →PIC16C65B-04/L
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16C65B-04E/PQ
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$11.1 / Unit
View Datasheet →PIC16C662-04E/L Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit RISC, Harvard, 14-bit instruction word |
| Instruction Set | 35 single-word instructions |
| Maximum Clock Frequency | 4 MHz |
| Instruction Execution Time | 200 ns (single cycle at 4 MHz) |
| Program Memory Type | OTP (One-Time-Programmable) |
| Program Memory Size | 7 KB (4K x 14) |
| Operating Voltage (Vdd) | 4.5 V to 5.5 V |
| Operating Temperature Range | -40 °C to +125 °C (enhanced grade) |
| I/O Pins | 33 |
| Package | 44-pin PLCC (J-lead, 16.59 x 16.59 mm) |
| Mounting Type | Surface Mount |
| ADC | 10-bit, multi-channel (number of channels per datasheet) |
| Analog Comparators | 2 |
| Communication Peripherals | USART, SSP/SPI/I²C, Parallel Slave Port |
| Timers | 3 (one 16-bit, two 8-bit) |
| Watchdog Timer | Yes |
| Brown-Out Reset | Yes |
PIC16C662-04E/L Pin Configuration
| Pin 1 | RA3/AN3 — Digital I/O / Analog input channel 3 |
| Pin 2 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| Pin 3 | RA5/AN4 — Digital I/O / Analog input channel 4 |
| Pin 4 | OSC1/CLKIN — Crystal oscillator input / external clock |
| Pin 5 | OSC2/CLKOUT — Crystal oscillator output |
| Pin 6 | VDD — Positive supply (5V) |
| Pin 7 | VSS — Ground |
| Pin 8 | RB0/INT — Digital I/O / External interrupt |
| Pin 9 | RB1 — Digital I/O |
| Pin 10 | RB2 — Digital I/O |
| Pin 11 | RB3 — Digital I/O |
| Pin 12 | RB4 — Digital I/O |
| Pin 13 | RB5 — Digital I/O |
| Pin 14 | RB6/PGC — Digital I/O / ICSP clock |
| Pin 15 | RB7/PGD — Digital I/O / ICSP data |
| Pin 16 | MCLR/VPP — Master clear reset / programming voltage |
| Pin 17 | RC0 — Digital I/O |
| Pin 18 | RC1 — Digital I/O |
| Pin 19 | RC2/CCP1 — Digital I/O / Capture/Compare/PWM 1 |
| Pin 20 | RC3/SCL — Digital I/O / I²C clock |
| Pin 21 | RC4/SDA — Digital I/O / I²C data |
| Pin 22 | RC5/SDO — Digital I/O / SPI data out |
| Pin 23 | RC6/TX/CK — Digital I/O / USART TX/clock |
| Pin 24 | RC7/RX/DT — Digital I/O / USART RX/data |
| Pin 25 | RD0 — Digital I/O / Parallel Slave Port |
| Pin 26 | RD1 — Digital I/O / Parallel Slave Port |
| Pin 27 | RD2 — Digital I/O / Parallel Slave Port |
| Pin 28 | RD3 — Digital I/O / Parallel Slave Port |
| Pin 29 | RD4 — Digital I/O / Parallel Slave Port |
| Pin 30 | RD5 — Digital I/O / Parallel Slave Port |
| Pin 31 | RD6 — Digital I/O / Parallel Slave Port |
| Pin 32 | RD7 — Digital I/O / Parallel Slave Port |
| Pin 33 | RE0/RD — Digital I/O / Parallel Slave Port read |
| Pin 34 | RE1/WR — Digital I/O / Parallel Slave Port write |
| Pin 35 | RE2/CS — Digital I/O / Parallel Slave Port chip select |
| Pin 36 | VDD — Positive supply (5V) |
| Pin 37 | VSS — Ground |
| Pin 38 | RA0/AN0 — Digital I/O / Analog input channel 0 |
| Pin 39 | RA1/AN1 — Digital I/O / Analog input channel 1 |
| Pin 40 | RA2/AN2 — Digital I/O / Analog input channel 2 |
| Pin 41 | RA6 — Digital I/O |
| Pin 42 | AN5 — Analog input channel 5 |
| Pin 43 | AN6 — Analog input channel 6 |
| Pin 44 | AN7 — Analog input channel 7 |
Typical Applications
PIC16C662-04E/L is suitable for 6 applications: Automotive Dashboard Cluster, HVAC Climate Control Panel, Industrial Sensor Front-End, Appliance User-Interface Controller, Point-of-Sale Terminal Front Panel, Body Electronics Module.
Automotive Dashboard Cluster
The PIC16C662-04E/L fits automotive dashboard cluster designs because of its -40 °C to +125 °C enhanced temperature grade, integrated 10-bit ADC for fuel/temperature sensor reads, dual comparators for fault detection, and 33 I/O lines to drive the LCD/segment/indicator network. Its 7 KB OTP memory is sized to hold cluster-state machines, gauge linearization tables, and OBD-II warning logic. The 44-pin PLCC J-lead package sits cleanly under a removable cluster housing, and the brown-out reset plus watchdog timer handle automotive load-dump and cranking transients. At a 4 MHz clock, instruction latency is 200 ns which is fast enough to scan a 33-I/O cluster matrix at >1 kHz refresh.
Recommended
HVAC Climate Control Panel
Climate-control panels benefit from the PIC16C662-04E/L's USART for talking to the body-control module, SSP/SPI/I²C port for driving a companion display driver, and the dual analog comparators for monitoring thermistor bridges and over-temperature events. The OTP program memory locks down the user's calibration data, and the enhanced temperature grade supports both cabin and under-hood control-box installations. The 44-PLCC J-lead package accommodates 33 I/O lines, enough to scan a 16-key matrix plus drive status LEDs and a 7-segment display without external I/O expanders.
Recommended
Industrial Sensor Front-End
Factory-floor sensor-conditioning front-ends use the PIC16C662-04E/L to digitize 4-20 mA or 0-10 V analog signals via the 10-bit ADC, run linearization in firmware, and forward readings over the USART or SPI to a PLC. The watchdog timer and brown-out reset protect against electrical noise common in industrial switchgear, and the -40 °C to +125 °C window covers unconditioned panel cabinets. The 4 MHz instruction rate provides 200 ns latency, sufficient for closed-loop PID with a 1 kHz control period. OTP memory secures the calibration coefficients against field tampering.
Recommended
Appliance User-Interface Controller
Washing machines, dishwashers, and ovens use the PIC16C662-04E/L as a cost-effective user-interface controller that scans keypads, drives 7-segment or LCD displays, and dispatches commands over the SPI/I²C bus to motor-control or heater boards. The 33 I/O pins handle the rotary encoder, status LED matrix, and door-lock sensor directly. The enhanced temperature grade supports oven-control installations where ambient electronics reach 85 °C and beyond. OTP memory locks the firmware once finalized, preventing warranty-voiding field mods on consumer appliances.
Recommended
Point-of-Sale Terminal Front Panel
POS terminals and electronic cash registers use the PIC16C662-04E/L as a low-cost front-panel controller, running the keypad scan, LCD/LED indicator drivers, and the secure PIN-entry isolation boundary. The USART bridges to the main terminal CPU, and OTP memory provides tamper-resistance for security-critical firmware. The 4 MHz speed grade yields enough cycles for a debounced 16-key matrix scan plus LCD update at 100 Hz without CPU saturation. The 44-pin PLCC socket-friendly package is ideal for the through-hole serviceability typical of legacy POS hardware.
Recommended
Body Electronics Module
Automotive body-electronics modules such as seat controllers, mirror adjusters, and lighting nodes use the PIC16C662-04E/L to consolidate switch inputs, drive motors via PWM outputs, and network to the central body controller over LIN/CAN through an external transceiver. The 16-bit timer/counter plus dual 8-bit timers generate the PWM channels for DC motors and dimming, while the ADC reads seat-position and current-sensor signals. Enhanced temperature grade handles the under-seat and under-hood environments where ambient temperatures cycle from -40 °C to +105 °C.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C662-04E/L — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C65B-04E/L | PIC16C64A-04E/L | PIC16C65A-04E/L | PIC16C65B-04/L |
|---|---|---|---|---|---|
| Package | 44-pin PLCC (J-lead, 16.59x16.59 mm) | 44-PLCC (J-lead) - same | 44-PLCC (J-lead) - same | 44-PLCC (J-lead) - same | 44-PLCC (J-lead) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Program Memory Type | OTP | OTP | OTP | OTP | OTP |
| Program Memory Size | 7 KB (4K x 14) | 8 KB | 4 KB | 8 KB | 8 KB |
| Temperature Grade | Enhanced (-40 °C to +125 °C) | Enhanced (-40 °C to +125 °C) | Enhanced (-40 °C to +125 °C) | Enhanced (-40 °C to +125 °C) | Commercial (0 °C to +70 °C) |
| Core / Architecture | 8-bit PIC16 RISC, 14-bit instruction | 8-bit PIC16 RISC, 14-bit instruction | 8-bit PIC16 RISC, 14-bit instruction | 8-bit PIC16 RISC, 14-bit instruction | 8-bit PIC16 RISC, 14-bit instruction |
| I/O Pins | 33 | 33 | 33 | 33 | 33 |
Key Differentiators
- Larger program memory than sibling PIC16C64A in same package (vs PIC16C64A-04E/L)
- Enhanced automotive temperature grade at -40 °C to +125 °C (vs PIC16C65B-04/L (commercial grade))
- 33 I/O pins vs fewer than newer 40-pin DIP PIC16F parts (vs PIC16F887-I/P (40-pin DIP))
Design Notes
The PIC16C662-04E/L uses OTP (one-time-programmable) program memory, so firmware must be fully validated before programming - there is no in-circuit erase path. Estimate the production risk: every board with a firmware bug requires a new programmed part (NCNR). Add a programming verification step (read-back compare) and order 5-10% overage to absorb scrap, per Microchip's OTP programming manual.
Decouple both VDD pins (pin 6 and pin 36 on the 44-PLCC) with 100 nF ceramic capacitors placed within 5 mm of each pin. Add a bulk 10 µF tantalum or aluminum electrolytic near the MCU for sustained ADC reference stability. The PIC16C662 analog reference shares the VDD rail, so a noisy supply will degrade ADC SNR; place a ferrite bead in series with the analog VDD if the digital rails are switching > 50 mA peak per the datasheet electrical characteristics.
The MCLR/VPP pin (pin 16) is a high-impedance input that can be triggered by leakage currents above 2 µA. Tie MCLR to VDD through a 10 kΩ pull-up resistor and add a 100 nF decoupling capacitor close to the pin to filter noise. For ICSP (in-circuit serial programming), Microchip recommends a diode or resistor between VPP and the rest of the circuit so the programmer can override the pull-up. Without this, ESD events or noisy reset environments will randomly reset the MCU.
At -40 °C to +125 °C ambient, the PIC16C662-04E/L draws typically 2-15 mA depending on oscillator and ADC activity. The 44-pin PLCC package has a theta_JA around 50 °C/W on a standard 2-layer PCB, so self-heating is minimal (< 1 °C). However, in sealed automotive clusters where ambient may already reach 105 °C, keep total MCU power below 100 mW by disabling unused peripherals via PCON and peripheral enable registers.
Use a 44-pin PLCC socket (e.g. 3M Textool or Aries) in low-volume builds so OTP parts can be replaced without desoldering. The 44-PLCC J-lead footprint is 1.27 mm pitch with pads extending ~ 2.0 mm outward from the package body. Route all I/O and power signals on inner layers first, keeping the crystal traces (OSC1/OSC2) short and surrounded by a ground guard ring to minimize EMI per the Microchip PIC16C6X hardware design checklist.
Compliance Information
RoHS/REACH/AEC-Q100 status for the PIC16C662-04E/L suffix is not explicitly stated in the verified distributor data. Microchip legacy OTP PIC16C parts were originally introduced before RoHS mandates; later date codes may include Pb-free finishes. Verify against the manufacturer's declaration of conformity or specific date code before assuming EU compliance.
