PIC16LC620-04E/P - 4MHz 8-Bit CMOS MCU 896B OTP | Microchip | 18-PDIP
MPN: PIC16LC620-04E/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.21 | $22.10 |
| 100 | $1.95 | $195.00 |
| 500 | $1.72 | $860.00 |
| 1,000 | $1.5 | $1,500.00 |
PIC16LC620-04E/P Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces into one package. Within the broader taxonomy, the PIC16LC620 sits in the 8-bit RISC MCU category (microcontroller -> embedded MCU -> 8-bit MCU -> RISC MCU -> PIC16 family -> EPROM/OTP variant). Its 35-instruction RISC architecture enables compact assembly coding and deterministic real-time control, making the PIC16C family one of the longest-lived 8-bit platforms for embedded control.
Key features of the PIC16LC620-04E/P include a two-level deep hardware stack, seven or eight special function hardware registers, and three addressing modes (direct, indirect, and relative). It provides 12 I/O ports, an internal watchdog timer, power-on reset, and a programmable code protection mechanism. The CMOS process delivers low power consumption suitable for battery-connected or always-on control nodes.
At the architectural level, the device uses a 14-bit wide instruction word with an 8-bit data path, which is the defining characteristic of the mid-range PIC16 family. This 14-bit ISA gives the PIC16LC620 substantially more code density per instruction than 8-bit MCUs such as the 8051, while remaining simple enough to program in assembly without an external toolchain dependency for short code paths.
Typical applications include industrial control logic, appliance control boards, automotive body electronics, simple sensor interfaces, and legacy embedded systems. Its OTP memory suits low-to-mid volume production where field firmware updates are not required and unit cost is a priority over in-system reprogrammability.
When designing with this part, verify that the 2.5V-6.25V supply range matches the system rail and that the 4MHz oscillator spec is consistent with required control-loop timing. Migration paths to flash-based PIC16F equivalents should be evaluated for new designs requiring in-circuit reprogrammability.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found on the manufacturer datasheet front page, giving procurement and design engineers a single decision-ready reference for the PIC16LC620-04E/P.
Drop-in alternatives for PIC16LC620-04E/P — 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 PIC16LC620-04E/P (same form factor and footprint) — differing in Instruction Cycle Time, Package, Program Memory Size, Program Memory Type, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C621-04/P
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16C622-04/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.55 / Unit
View Datasheet →PIC16LC620-04I/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.78 / Unit
View Datasheet →PIC16LC620A-04I/P
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16F628A-I/P
✅ Drop-In✓ In Stock
$1.62 / Unit
View Datasheet →PIC16LC620-04E/P Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC16 RISC |
| Program Memory Type | OTP (EPROM-based) |
| Program Memory Size | 896 bytes (512 x 14) |
| Data RAM | 80 bytes |
| Maximum Clock Speed | 4 MHz |
| Instruction Cycle | 200 ns (single-cycle, except branches = 2-cycle) |
| Instruction Set Size | 35 instructions |
| Instruction Word Width | 14 bits |
| Data Path Width | 8 bits |
| I/O Ports | 12 (13 I/O pins) |
| Supply Voltage Range | 2.5 V to 6.25 V |
| Hardware Stack Depth | 2 levels |
| Operating Temperature Range | Automotive / extended (per 'E' suffix) |
| Package | 18-pin PDIP (Plastic DIP, 0.300 inch) |
| Mounting Type | Through-Hole |
| Peripherals | Watchdog Timer, Power-On Reset (POR), Code Protection |
| Addressing Modes | Direct, Indirect, Relative |
PIC16LC620-04E/P Pin Configuration
| Pin 1 | RA2 — I/O port A bit 2 |
| Pin 2 | RA3 — I/O port A bit 3 |
| Pin 3 | RA4/T0CKI — I/O port A bit 4 / Timer 0 clock input |
| Pin 4 | MCLR — Master Clear (reset) input, active low |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — I/O port B bit 0 / External interrupt input |
| Pin 7 | RB1 — I/O port B bit 1 |
| Pin 8 | RB2 — I/O port B bit 2 |
| Pin 9 | RB3 — I/O port B bit 3 |
| Pin 10 | RB4 — I/O port B bit 4 |
| Pin 11 | RB5 — I/O port B bit 5 |
| Pin 12 | RB6 — I/O port B bit 6 |
| Pin 13 | RB7 — I/O port B bit 7 |
| Pin 14 | VDD — Positive supply voltage (2.5V-6.25V) |
| Pin 15 | OSC2/CLKOUT — Oscillator crystal output / Clock output |
| Pin 16 | OSC1/CLKIN — Oscillator crystal input / External clock input |
| Pin 17 | RA0 — I/O port A bit 0 |
| Pin 18 | RA1 — I/O port A bit 1 |
Typical Applications
PIC16LC620-04E/P is suitable for 6 applications: Industrial Control Logic, Automotive Body Electronics, Appliance Control Boards, Sensor Interface Modules, Legacy Embedded System Replacement, Simple State Machine Controllers.
Industrial Control Logic
The PIC16LC620-04E/P fits industrial control logic boards where deterministic 200 ns instruction execution and a compact 8-bit core handle simple sequencing tasks. Its 12 I/O pins drive relays, optocouplers, and indicator LEDs, while the 2.5V-6.25V supply range accepts both 3.3V and 5V rails common in PLC backplanes and machine controllers. The OTP memory suits high-volume programs where firmware is locked at production and unit cost dominates the BOM. Per Microchip's PIC16C62X family datasheet, the 35-instruction RISC core yields compact assembly code that fits within the 896B program memory for most state-machine and I/O-scanning tasks. Compared with a flash-based PIC16F628A, this OTP variant trades in-circuit reprogrammability for lower unit cost in production.
Recommended
Automotive Body Electronics
The PIC16LC620-04E/P's 'E' automotive/extended temperature suffix and 2.5V-6.25V supply tolerance make it suitable for body electronics modules running directly from 12V regulated rails. Typical uses include seat controller nodes, mirror-fold logic, interior lighting PWM drivers, and wiper-interval timing. The 12 I/O lines connect to low-side MOSFET drivers and Hall-effect sensors, while the 4MHz core executes control loops fast enough for sub-millisecond response on switch-bounce debouncing. The OTP memory prevents accidental field reprogramming, supporting anti-tamper requirements in security-sensitive automotive subsystems. According to the PIC16C62X datasheet, the device's hardware watchdog timer and power-on reset provide the fault-recovery primitives required by body-electronics functional-safety baselines.
Recommended
Appliance Control Boards
The PIC16LC620-04E/P serves as the central controller in white-goods appliances such as washing machines, dishwashers, and microwave ovens where a small 8-bit MCU manages motor timing, sensor reading, and user-interface scanning. Its 80-byte RAM accommodates stack frames for short interrupt service routines triggered by zero-crossing detectors and timer overflows. The 4MHz clock rate delivers 200 ns instruction cycles, sufficient for 50/60 Hz line-frequency timing and basic PWM generation for buzzer and indicator control. OTP memory locks the firmware at production, preventing post-sale tampering with safety-relevant parameters. Per Microchip's application notes for PIC16C62X, the part's low power consumption is advantageous for standby modes where Energy Star ratings matter.
Recommended
Sensor Interface Modules
The PIC16LC620-04E/P provides a low-cost interface between analog or digital sensors and a host system in remote or distributed sensing networks. The 12 I/O pins handle multiple switch contacts, low-frequency analog sampling via comparator inputs, and UART bit-banged communication to upstream controllers. Operating from 2.5V-6.25V, the part accepts power directly from 3.3V regulated supplies or 5V industrial rails without level shifters. Its 35-instruction RISC core keeps firmware under 896 bytes for typical sensor-conditioning routines. According to the PIC16C62X datasheet, the watchdog timer and POR provide field-reliable operation in unattended sensor installations.
Recommended
Legacy Embedded System Replacement
The PIC16LC620-04E/P is commonly stocked as a direct replacement for end-of-life 8-bit MCU designs originally built around PIC16C5X or PIC16C6X architectures. Its PIC16 mid-range core is source-compatible with the broader PIC16 family, allowing code recompilation with minor register adjustments. The 18-PDIP through-hole package suits legacy through-hole PCB designs that cannot be converted to surface mount. OTP memory ensures no firmware drift over decades of field deployment, while the automotive/extended temperature rating supports outdoor and industrial cabinet installations. Per Microchip's product longevity program, the PIC16C62X family remains in production for long-life-cycle industrial customers.
Recommended
Simple State Machine Controllers
The PIC16LC620-04E/P's RISC architecture and 200 ns instruction cycle make it well-suited for implementing compact state machines that sequence outputs based on input events and timer ticks. With 80 bytes of RAM and 12 I/O pins, the part handles typical Mealy/Moore machines with up to a dozen states and half a dozen inputs. Applications include vending machine coin acceptors, security keypad scanners, and HVAC damper controllers. The two-level hardware stack supports one level of subroutine nesting, sufficient for modular state-machine code organization. Per Microchip application notes, the PIC16C62X is a workhorse for educational and hobby projects teaching embedded control fundamentals.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC620-04E/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C621-04/P | PIC16C622-04/P | PIC16LC620-04I/P | PIC16LC620A-04I/P | PIC16F628A-I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-PDIP | 18-PDIP - same | 18-PDIP - same | 18-PDIP - same | 18-PDIP - same | 18-PDIP - same |
| Core Architecture | 8-bit PIC16 RISC | 8-bit PIC16 RISC | 8-bit PIC16 RISC | 8-bit PIC16 RISC | 8-bit PIC16 RISC | 8-bit PIC16 RISC |
| Program Memory Type | OTP (EPROM) | OTP (EPROM) | OTP (EPROM) | OTP (EPROM) | OTP (EPROM) | Flash (reprogrammable) |
| Program Memory Size | 896 bytes (512 x 14) | 1024 bytes (1K) | 2048 bytes (2K) | 896 bytes (512 x 14) | 896 bytes (512 x 14) | 2048 bytes (Flash) |
| Maximum Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz |
| Operating Voltage Range | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.0 V to 5.5 V |
| Temperature Grade | Automotive / Extended (E) | Commercial (no suffix) | Commercial (no suffix) | Industrial (I) | Industrial (I) | Industrial (I) |
Key Differentiators
- Extended / automotive temperature range (vs PIC16C621-04/P)
- Optimized for high-volume OTP production (vs PIC16F628A-I/P)
- Low-voltage operation down to 2.5V (vs PIC16C620 (standard C variant))
Design Notes
Decouple VDD (pin 14) and VSS (pin 5) with a 100 nF ceramic capacitor placed within 5 mm of the device pins, plus a 10 uF bulk capacitor on the supply rail. The PIC16LC620's POR circuit requires a clean VDD ramp; a 1 kohm MCLR pull-up to VDD and a 10 nF cap to ground is recommended to extend the reset pulse during slow power rise. Brown-out conditions below 2.5 V can cause undefined program execution, so ensure the regulator has adequate headroom under worst-case load transients.
Route the OSC1/OSC2 traces short and symmetric to minimize stray capacitance. For a 4 MHz crystal, keep the load capacitor traces within 10 mm of the oscillator pins and use a grounded guard ring around the crystal can to reduce EMI coupling into adjacent analog or high-impedance traces. Place the MCLR pull-up components close to pin 4 to avoid spurious resets from injected noise on long reset traces.
OTP (One-Time Programmable) memory cannot be erased or rewritten. Once programmed, the firmware is permanent - always verify the code on a flash-based equivalent (such as PIC16F628A-I/P) before committing to OTP programming. A single bit error during OTP programming renders the device unusable. Always read back and verify the programmed device immediately after programming in production. Note that the PIC16LC620's two-level hardware stack imposes a strict one-level subroutine nesting limit, which affects C code generation.
Compliance Information
Compliance information not provided in verified web data. The PIC16LC620-04E/P is an OTP EPROM device from the legacy PIC16C62X family; the 'E' suffix indicates automotive/extended temperature range but does NOT denote AEC-Q100 qualification. Verify RoHS/REACH status directly with Microchip before use in regulated markets.
