PIC16C62AT-04I/SS - 4MHz 8-Bit OTP MCU | Microchip Technology
MPN: PIC16C62AT-04I/SS ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.2 | $5.20 |
| 10 | $4.85 | $48.50 |
| 100 | $4.3 | $430.00 |
| 500 | $3.95 | $1,975.00 |
| 1,000 | $3.6 | $3,600.00 |
PIC16C62AT-04I/SS Overview
A microcontroller (MCU) is a single-chip integrated circuit that combines a CPU core, program memory, working RAM, and programmable I/O peripherals. The PIC16C62A family belongs to the Microchip PIC16 mid-range architecture, which is one of the most widely deployed 8-bit MCU lineages in the industry. Within that hierarchy, the PIC16C62AT-04I/SS sits at the OTP-programmable industrial tier: OTP allows one-time field programming via a device programmer, in contrast to flash-based PIC16F parts that allow in-circuit reprogramming, making OTP variants attractive for cost-sensitive and tamper-resistant production.
Key features of the PIC16C62AT-04I/SS include 35 single-word instructions, a 14-bit instruction word, a hardware 8-bit timer/counter with a programmable prescaler, a Watchdog Timer with its own on-chip RC oscillator, and an analog comparator module. The PIC16C6X core architecture means most instructions execute in a single 200 ns instruction cycle at 20 MHz (or 1 us at 4 MHz on this part), dramatically simplifying deterministic real-time control firmware.
Typical applications include appliance control boards, sensor-interface front ends, industrial sensor hubs, automotive body and chassis subsystems, low-cost embedded control, and battery-powered instrumentation. The wide supply range and CMOS design also make it suitable for remote, low-duty-cycle wireless sensor nodes where quiescent current matters. When designing with this device, note that OTP memory cannot be erased; design the firmware revision carefully or migrate to a flash-based PIC16F equivalent (such as the PIC16F690) for prototyping. The 28-pin SSOP footprint is also shared with several flash-based PIC16F siblings, enabling layout reuse across prototypes and production.
Drop-in alternatives for PIC16C62AT-04I/SS — 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 PIC16C62AT-04I/SS (same form factor and footprint) — differing in Program Memory Size, Program Memory Type, Core Architecture, Operating Temperature Range, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
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View Datasheet →PIC16C62AT-04I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16C6X (8-bit RISC) |
| Program Memory Size | 3.5 KB (2K x 14) OTP |
| RAM Size | 128 x 8 bytes |
| Number of I/O Pins | 22 |
| Maximum Clock Frequency | 4 MHz |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| Package / Case | 28-SSOP (0.209 inch / 5.30 mm body width) |
| Mounting Type | Surface Mount |
| Instruction Set | 35 single-word instructions, 14-bit opcode |
| Instruction Cycle Time | 1 us at 4 MHz |
| Timers | 8-bit Timer/Counter0 with prescaler; WDT |
| Peripherals | Analog comparator, parallel slave port, Capture/Compare/PWM |
| Program Memory Type | One-Time Programmable (OTP) EPROM |
PIC16C62AT-04I/SS Pin Configuration
| Pin 1 | RA2/AN2 — GPIO RA2 / analog input |
| Pin 2 | RA3/AN3 — GPIO RA3 / analog input |
| Pin 3 | RA4/T0CKI — GPIO RA4 / Timer0 clock input |
| Pin 4 | RA5/SS — GPIO RA5 / SPI slave select |
| Pin 5 | VSS — Ground |
| Pin 6 | RB0/INT — GPIO RB0 / external interrupt |
| Pin 7 | RB1 — GPIO RB1 |
| Pin 8 | RB2 — GPIO RB2 |
| Pin 9 | RB3 — GPIO RB3 |
| Pin 10 | RB4 — GPIO RB4 |
| Pin 11 | RB5 — GPIO RB5 |
| Pin 12 | RB6 — GPIO RB6 / programming clock |
| Pin 13 | RB7 — GPIO RB7 / programming data |
| Pin 14 | VSS — Ground |
| Pin 15 | VDD — Positive supply (5 V) |
| Pin 16 | RC0 — GPIO RC0 |
| Pin 17 | RC1 — GPIO RC1 |
| Pin 18 | RC2/CCP1 — GPIO RC2 / Capture-Compare-PWM |
| Pin 19 | RC3 — GPIO RC3 |
| Pin 20 | RC4 — GPIO RC4 |
| Pin 21 | RC5 — GPIO RC5 |
| Pin 22 | RC6 — GPIO RC6 |
| Pin 23 | RC7 — GPIO RC7 |
| Pin 24 | OSC2/CLKOUT — Oscillator output / clock out |
| Pin 25 | OSC1/CLKIN — Oscillator input / clock in |
| Pin 26 | MCLR/VPP — Master clear reset / programming voltage |
| Pin 27 | RA0/AN0 — GPIO RA0 / analog input 0 |
| Pin 28 | RA1/AN1 — GPIO RA1 / analog input 1 |
Typical Applications
PIC16C62AT-04I/SS is suitable for 6 applications: Appliance Control Boards, Industrial Sensor Hubs, Automotive Body and Chassis Subsystems, Low-Cost Embedded Control, Battery-Powered Instrumentation, Remote Sensor Nodes / Wireless Front Ends.
Appliance Control Boards
The PIC16C62AT-04I/SS is well matched to appliance control boards such as washing machines, dishwashers, and microwave ovens where deterministic 8-bit control and low unit cost matter more than flash reprogrammability. With 22 GPIO pins, an analog comparator, and a hardware 8-bit timer, the device can drive triac-controlled AC loads via opto-isolated outputs and read front-panel keypads and NTC sensors in the same firmware loop. The 4 MHz clock is sufficient for the slow control loops typical of appliance timing and sensor averaging. A single 5 V rail powers both the MCU and the comparator reference, simplifying the SMPS secondary side. Designers standardize on the SSOP-28 footprint so the same PCB can accept PIC16C62A, PIC16C620A, or PIC16F690 depending on cost vs reprogrammability.
Recommended
Industrial Sensor Hubs
In industrial sensor aggregation nodes the PIC16C62AT-04I/SS functions as a low-power protocol translator between 4-20 mA analog loops, discrete switch inputs, and a serial uplink to a PLC or gateway. Its analog comparator thresholds the 4-20 mA signal into discrete states for alarm reporting, while its GPIO captures dry-contact inputs from limit switches. The fully-static CMOS design lets the firmware put the part into sleep between sensor scans, dropping quiescent current to single-digit microamps for battery-backed or energy-harvested installations. Industrial -40 C to +85 C rating permits deployment in unconditioned control cabinets and outdoor junction boxes. The 28-pin SSOP footprint also allows a re-spin to PIC16F690-I/SS for field firmware updates over the same PCB.
Recommended
Automotive Body and Chassis Subsystems
The PIC16C62AT-04I/SS historically served automotive body controllers for window lift, mirror adjust, seat position memory, and lighting timer functions where 8-bit deterministic control and low quiescent current were sufficient. The 22 GPIO pins map cleanly onto the small relay or MOSFET half-bridge arrays used for window and mirror motors, and the analog comparator monitors current sense for stall detection. Industrial -40 C to +85 C rating covers most cabin environments though not under-hood; AEC-Q100 parts are recommended for under-hood. Today, automotive designs prefer the flash-based PIC16F690 family or dsPIC33 for diagnostic UDS support, but the PIC16C62AT-04I/SS remains in service on long-lifecycle vehicles already in the field.
Recommended
Low-Cost Embedded Control
For high-volume embedded control products where every cent of BOM matters and the firmware is fully validated, the PIC16C62AT-04I/SS offers an attractive cost-down path over flash parts. Its 35-instruction PIC16 core compiles from MPLAB XC8 and Hi-Tech C and produces compact code that fits easily in the 3.5 KB OTP. The 22 GPIO drive small graphical LCDs or charlieplexed LED matrices for user interface, while the on-chip analog comparator performs battery voltage and current monitoring for portable products. With 128 bytes of RAM and a 4 MHz clock, the part targets slow control loops (thermostats, HVAC dampers, irrigation timers) rather than real-time DSP. Migrating to PIC16F690-I/SS is straightforward when in-field updates become a requirement.
Recommended
Battery-Powered Instrumentation
The PIC16C62AT-04I/SS suits battery-powered instrumentation such as handheld multimeters, portable environmental loggers, and remote thermostats thanks to its fully-static CMOS core, single 5 V supply, and microamp-range standby current. The on-chip Watchdog Timer with dedicated RC oscillator lets the firmware enter sleep between measurements, waking periodically on the WDT or an external interrupt to take a sensor reading and transmit. The 128-byte RAM is sufficient for circular data buffers and small calibration tables, and the analog comparator can perform threshold detection without waking the ADC. Industrial temperature rating allows outdoor and refrigerated deployment. For designs needing ADC, designers move to PIC16F690-I/SS in the same SSOP-28 footprint.
Recommended
Remote Sensor Nodes / Wireless Front Ends
In low-duty-cycle wireless sensor nodes the PIC16C62AT-04I/SS acts as the MCU front end that wakes a sub-GHz radio module (such as an RFM22B or CC1101) only when a sensor threshold is crossed. The analog comparator monitors the analog sensor front end continuously while the CPU sleeps, drawing only a few microamps until wake-up, at which point the firmware reads a digital sensor over GPIO or SPI and bursts the data to the gateway. The 22 GPIO pins are enough to drive the radio's SPI bus, several interrupt lines, and status LEDs in parallel. The 28-pin SSOP footprint keeps the node compact enough to fit inside sensor housings. For nodes that need ADC or in-field firmware updates, PIC16F690-I/SS is the recommended migration.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C62AT-04I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C62A-04I/SP | PIC16C62A-04/SS | PIC16F690-I/SS |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP (5.30 mm) | 28-SPDIP | 28-SSOP - same | 28-SSOP - same |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 7 KB Flash |
| RAM | 128 B | 128 B | 128 B | 256 B |
| I/O Pins | 22 | 22 | 22 | 20 |
| Max Clock | 4 MHz | 4 MHz | 4 MHz | 20 MHz |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 2.0 V to 5.5 V |
| Temperature Range | -40 C to +85 C (Industrial) | -40 C to +85 C | 0 C to +70 C (Commercial) | -40 C to +85 C |
| Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | Flash |
| Lifecycle | Obsolete | Obsolete | Obsolete | Active |
Key Differentiators
- Obsolete OTP status drives designers to flash-based PIC16F690-I/SS (vs PIC16F690-I/SS)
- Industrial temperature grade distinguishes from commercial PIC16C62A-04/SS (vs PIC16C62A-04/SS)
- Through-hole variant exists for prototyping and rugged deployments (vs PIC16C62A-04I/SP)
Design Notes
OTP memory on the PIC16C62AT-04I/SS cannot be electrically erased - each device can only be programmed once. If a code bug escapes validation the chip must be discarded. Always program at least 5-10 prototype units for engineering bring-up before committing to a production run, and validate firmware on a flash-based PIC16F690-I/SS or PIC16F677-I/SS first using the same SSOP-28 footprint, then port the validated firmware to the OTP device for production. This dual-development flow reduces OTP scrap dramatically.
The PIC16C62AT-04I/SS requires a stable 5 V supply in the 4.5 V to 5.5 V range with adequate decoupling. Place a 100 nF ceramic decoupling capacitor as close as possible to pins 14 (VSS) and 15 (VDD), plus a bulk 10 uF tantalum or aluminum electrolytic on the same supply rail. The MCU is sensitive to VDD brownouts during MCLR-driven reset; if the upstream supply is shared with relays or motors, add a ferrite bead or LC filter to isolate MCU noise from the analog comparator reference.
For the SSOP-28 (5.30 mm body) package, follow standard SSOP land pattern guidelines: 0.65 mm pitch pads with 0.4 mm pad width and 0.4 mm pad length beyond the package body. Use a 4-layer PCB with a continuous ground plane beneath the MCU to keep digital switching noise away from the analog comparator inputs. Keep the 4 MHz crystal or resonator traces short and symmetric, and route MCLR (pin 26) away from the oscillator traces to avoid false resets during crystal startup ringing.
Compliance Information
RoHS, REACH, lead-free, halogen-free, and conflict-minerals status are not present in the verified data and are recorded as unknown. Original PIC16C6X OTP family predates RoHS; legacy allocations may be non-compliant. PIC16C62A industrial parts are not AEC-Q100 qualified - use automotive-grade PIC16F or dsPIC families for AEC-Q100 designs.
