PIC16C62BT-04/SO - 8-bit OTP MCU 4MHz 3.5KB | Microchip
MPN: PIC16C62BT-04/SO ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
PIC16C62BT-04/SO Overview
A microcontroller is a single integrated circuit that combines a processor core, program memory, data memory, and peripheral functions on one die. The PIC16 architecture uses a RISC instruction set with a 14-bit instruction word, sitting within the broader hierarchy of 8-bit microcontrollers, embedded processors, and integrated circuits. OTP memory means the program is written exactly once at the factory or in production, giving lower cost but no field reprogramming capability.
Key features include the 4MHz maximum clock frequency (the -04 speed grade), 2K words of OTP flash-free program storage, 128 bytes of data RAM, and the PIC16 RISC core with fast, deterministic instruction execution. The 28-SOIC package provides 22 I/O pins across ports RA, RB, and RC, along with on-chip oscillator, timer, and interrupt resources typical of the PIC16C6x family.
Technically, the device implements a Harvard architecture with separate program and data buses, allowing instruction fetch and data access in the same cycle. The OTP EPROM-based program memory reduces unit cost versus windowed EPROM or flash variants, which is why the T-suffix tape-and-reel version targets high-volume, frozen-firmware production runs.
Typical applications include appliance control boards, industrial timers, simple motor-control sequencing, and legacy replacement sockets where 5V logic and OTP firmware security are required.
Design consideration: since OTP cannot be reprogrammed, thoroughly validate firmware in the windowed or flash-compatible family members before committing to tape-and-reel OTP production.
This page synthesizes verified distributor data, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC16C62BT-04/SO — 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 PIC16C62BT-04/SO (same form factor and footprint) — differing in Core Architecture, Package, Program Memory Type, RoHS Status, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C62B-04/SO
✅ Drop-In✓ In Stock
$3.62 / Unit
View Datasheet →PIC16C62BT-04I/SO
✅ Drop-In✓ In Stock
$5.1 / Unit
View Datasheet →PIC16C62BT-04E/SO
✅ Drop-In✓ In Stock
$3.18 / Unit
View Datasheet →PIC16C62A-04E/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$4.75 / Unit
View Datasheet →PIC16C622T-04E/SO
✅ Drop-In✓ In Stock
$3.1 / Unit
View Datasheet →PIC16C622A-04I/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.72 / Unit
View Datasheet →PIC16C62B-04I/SS
✅ Drop-In✓ In Stock
$5.4 / Unit
View Datasheet →PIC16C62BT-04/SO Maximum Ratings & Electrical Characteristics
| Core Processor | PIC16 RISC (8-bit) |
| Core Size | 8-bit |
| Maximum Clock Frequency | 4 MHz |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM Size | 128 bytes |
| Number of I/O | 22 |
| Supply Voltage | 5 V |
| Temperature Grade | Commercial (0C to +70C) |
| Package | 28-SOIC (0.295 in, 7.50 mm width) |
| Mounting Type | Surface Mount |
| Terminal Form | Gull Wing |
| Packaging | Tape & Reel (T suffix) |
| Instruction Word Width | 14-bit |
| Operating Temperature Max | 70 C |
PIC16C62BT-04/SO Pin Configuration
| Pin 1 | MCLR/VPP — Master clear reset / programming voltage input |
| Pin 2 | RA0 — Port A bit 0, bidirectional I/O |
| Pin 3 | RA1 — Port A bit 1, bidirectional I/O |
| Pin 4 | RA2 — Port A bit 2, bidirectional I/O |
| Pin 5 | RA3 — Port A bit 3, bidirectional I/O |
| Pin 6 | RA4 — Port A bit 4, open-drain I/O / Timer0 clock input |
| Pin 7 | RA5 — Port A bit 5, bidirectional I/O |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKIN — Oscillator input / external clock input |
| Pin 10 | OSC2/CLKOUT — Oscillator output / clock output |
| Pin 11 | RC0 — Port C bit 0, bidirectional I/O / Timer1 oscillator |
| Pin 12 | RC1 — Port C bit 1, bidirectional I/O / Timer1 oscillator |
| Pin 13 | RC2 — Port C bit 2, bidirectional I/O |
| Pin 14 | RC3 — Port C bit 3, bidirectional I/O |
| Pin 15 | RC4 — Port C bit 4, bidirectional I/O |
| Pin 16 | RC5 — Port C bit 5, bidirectional I/O |
| Pin 17 | RC6 — Port C bit 6, bidirectional I/O |
| Pin 18 | RC7 — Port C bit 7, bidirectional I/O |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive power supply, 5V |
| Pin 21 | RB0/INT — Port B bit 0, external interrupt input |
| Pin 22 | RB1 — Port B bit 1, bidirectional I/O |
| Pin 23 | RB2 — Port B bit 2, bidirectional I/O |
| Pin 24 | RB3 — Port B bit 3, bidirectional I/O |
| Pin 25 | RB4 — Port B bit 4, interrupt-on-change I/O |
| Pin 26 | RB5 — Port B bit 5, interrupt-on-change I/O |
| Pin 27 | RB6 — Port B bit 6, interrupt-on-change I/O / programming clock |
| Pin 28 | RB7 — Port B bit 7, interrupt-on-change I/O / programming data |
Typical Applications
PIC16C62BT-04/SO is suitable for 6 applications: Appliance Control Boards, Industrial Timer and Sequencer Systems, Legacy Board Replacements and EOL Sustaining, Consumer Electronics Subsystems, Automotive Accessory and Aftermarket Modules, Test Fixtures and Production Test Equipment.
Appliance Control Boards
The PIC16C62BT-04/SO fits appliance control applications such as washing machine sequencers, microwave panel controllers, and small kitchen appliance logic because its 22 I/O lines drive relays, LEDs, and keypad matrices directly from a single 5V supply. The 3.5KB OTP memory holds a complete frozen control state machine, and the OTP nature provides firmware immutability valued in certified appliance production. Placed on the control PCB with the internal oscillator option, the design needs no external timing crystals for non-critical timing, reducing BOM cost. Because firmware is burned once at final test, field updates are impossible, so production must use fully validated code, which suits mature appliance platforms with stable feature sets.
Recommended
Industrial Timer and Sequencer Systems
In industrial timers, pump-sequencing controllers, and process interlock panels, the PIC16C62BT-04/SO offers deterministic RISC execution at 4MHz with fixed instruction timing, simplifying timeout and sequencing calculations. The 128-byte RAM supports state variables and small lookup tables, while port RC drives relay drivers and port RB handles sensor inputs with interrupt-on-change capability. OTP memory prevents unauthorized firmware tampering on installed equipment. The 5V supply interfaces directly with legacy industrial 5V logic without level translation, and the 28-SOIC gull-wing package withstands typical industrial soldering and vibration profiles. Designers should reserve the industrial-grade PIC16C62BT-04I/SO for cabinets exceeding 70C ambient.
Recommended
Legacy Board Replacements and EOL Sustaining
The primary modern role of the PIC16C62BT-04/SO is sustaining end-of-life equipment: replacing failed microcontrollers on legacy PCBs whose land patterns were designed for the 28-SOIC PIC16C6x family. Because all PIC16C62B variants share identical pinout, footprint, and 5V operating envelope, a stocked PIC16C62B-04/SO or industrial-grade variant drops in without PCB rework. The OTP program memory is reprogrammed with the recovered production firmware image using a PICSTART-style programmer before insertion. Engineering teams should verify the firmware binary is archived, since OTP cannot be re-flashed; one bad burn consumes a device. Tape-and-reel T-suffix packaging suits automated rework and medium-volume service runs.
Recommended
Consumer Electronics Subsystems
Cost-sensitive consumer products - remote receivers, small display drivers, toy controllers, and battery-charger supervision boards - historically used PIC16C OTP devices for their low unit cost at volume. The PIC16C62BT-04/SO's tape-and-reel supply feeds high-speed SMT lines, and the 4MHz internal-clock-capable design avoids crystal costs in applications with loose timing tolerance. Its 22 I/O lines cover keypad scanning, LED driving, and simple infrared decoding within one 28-SOIC footprint. The OTP trade-off is acceptable when firmware is frozen before mass production, since per-unit cost beats flash equivalents. For new consumer designs, Microchip's PIC16F flash family is recommended, but for existing frozen-firmware products this OTP part remains the economic choice.
Recommended
Automotive Accessory and Aftermarket Modules
Aftermarket automotive accessories - alarm systems, window-lift controllers, and add-on lighting modules designed in the PIC16C era - used the PIC16C62B family for port density and firmware lock. In these 12V systems, the 5V PIC16C62BT-04/SO is fed from a local linear regulator, and its 22 I/O lines drive MOSFET gate drivers and read switch inputs. The OTP memory provides copy protection for proprietary control algorithms. For under-hood or cabin installations experiencing temperature extremes, the industrial or extended-temperature family members (04I or 04E speed/temperature codes) should be selected, since the commercial-grade base part is rated only to 70C. Keep load-dump protection upstream of the 5V regulator to protect the MCU.
Recommended
Test Fixtures and Production Test Equipment
Bench and in-circuit test fixtures frequently embed a small MCU to sequence test steps, drive relays, and read pass/fail inputs; the PIC16C62BT-04/SO serves this role with 22 dedicated I/O lines and deterministic 4MHz execution. In factory fixtures, firmware is fixed for the life of the fixture, which aligns naturally with OTP memory - the burned program cannot drift or be accidentally modified by operators. The 28-SOIC package mounts on simple two-layer fixture boards, and the 5V logic connects directly to legacy TTL-compatible test hardware. Because fixture code changes rarely, the inability to reprogram OTP is a security benefit rather than a limitation, and spare pre-programmed devices can be burned and shelved as maintenance spares.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C62BT-04/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C62B-04/SO | PIC16C62BT-04I/SO | PIC16C62BT-04E/SO | PIC16C622T-04E/SO | PIC16C62B-04I/SS |
|---|---|---|---|---|---|---|
| Package | 28-SOIC (7.50mm) | 28-SOIC (7.50mm) - same | 28-SOIC (7.50mm) - same | 28-SOIC (7.50mm) - same | 28-SOIC (7.50mm) - same | 28-SSOP - different footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Program Memory | 3.5 KB (2K x 14) OTP | 3.5 KB (2K x 14) OTP | 3.5 KB (2K x 14) OTP | 3.5 KB (2K x 14) OTP | 4 KB (4K x 14) OTP | 3.5 KB (2K x 14) OTP |
| RAM Size | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 176 bytes | 128 bytes |
| Temperature Grade | Commercial (0C to +70C) | Commercial (0C to +70C) | Industrial (-40C to +85C) | Extended | Extended | Industrial (-40C to +85C) |
| Number of I/O | 22 | 22 | 22 | 22 | 22 | 22 |
| Packaging | Tape & Reel (T) | Tube / partial reel | Tape & Reel (T) | Tape & Reel (T) | Tape & Reel (T) | Tube / Tape & Reel |
Key Differentiators
- Identical non-tape variant available (vs PIC16C62B-04/SO)
- Wider temperature envelope option (vs PIC16C62BT-04I/SO)
- Double program memory in same footprint (vs PIC16C622T-04E/SO)
Design Notes
OTP firmware is permanent: once the PIC16C62BT-04/SO is programmed, errors cannot be corrected in the field. Always validate the production binary on a windowed-EPROM (JW) device or an emulator first, and archive the verified hex image with version control. Burn a small stock of pre-programmed spares from the same validated image before ending the programming session to guarantee consistency across production lots.
Place a 100nF ceramic decoupling capacitor directly across the VDD (pin 20) and VSS (pin 19) pins, plus bulk capacitance of 4.7uF to 10uF near the supply entry. Keep the OSC1/OSC2 crystal traces (pins 9-10) short and guard them with ground when using an external crystal in HS/XT mode. For noise-heavy industrial boards, route RB0/INT away from relay and motor driver traces to prevent spurious interrupts on the edge-sensitive input.
The device is specified for a nominal 5V supply; the exact minimum/maximum supply limits per speed and temperature grade must be taken from the manufacturer datasheet rather than assumed. When deriving 5V from industrial 24V or automotive 12V rails, use a regulated LDO with transient protection upstream. Estimated: at typical PIC16C quiescent currents of a few mA plus I/O sink loads, a SOT-223 or SO-8 LDO usually suffices thermally, but compute junction rise with your actual I/O load before finalizing.
Compliance Information
Legacy PIC16C OTP-era part; RoHS/REACH status not stated in the verified web data provided and must be confirmed on the Microchip product page before EU shipments.
