MC9S08SE4CRL - S08 8-bit MCU, 4KB Flash, 20MHz, 28-PDIP | NXP
N.º de pieza: MC9S08SE4CRL ✗ Fin de vida| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $0.66 | $0,66 |
| 10 | $0.6 | $6,00 |
| 100 | $0.54 | $54,00 |
| 500 | $0.49 | $245,00 |
| 1.000 | $0.45 | $450,00 |
MC9S08SE4CRL Descripción general
An 8-bit microcontroller is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals on one die, positioned within the broader hierarchy of embedded processors: MCU -> microcontroller -> embedded processor -> semiconductor device. The S08 family succeeds the HC08 family, providing excellent compatibility with Freescale's 5V MCU portfolio, including pin, peripheral, and tool compatibility, which simplifies migration between family members.
Key features of the MC9S08SE4CRL include the 20 MHz HCS08 central processing unit (CPU) with HC08 assembly source compatibility, 4 KB of in-circuit reprogrammable FLASH memory, operation from both 3.3V and 5V supplies (per distributor parametric data), and a low-cost entry point for high-volume designs. The S08SE series integrates typical S08 peripherals such as timers, serial communication interfaces, and ADC channels - consult the manufacturer datasheet for the exact peripheral configuration of this memory-density variant.
Architecture-wise, the HCS08 core uses a CISC instruction set with upward-compatible HC08 object code, a background debug module (BDM) for non-intrusive on-chip debugging, and internal bus operation at half the CPU clock rate, delivering deterministic 8-bit real-time performance suitable for cost-sensitive control tasks.
Typical applications include small home appliances, low-cost consumer electronics, battery chargers, simple motor control, industrial sensors, and legacy 5V system replacements where HC08 compatibility and PDIP through-hole mounting are required for prototyping and low-volume production.
For design, note that the PDIP package eases hand assembly and rework on 2.54 mm pitch prototyping boards; verify supply-voltage-dependent parameter limits in the datasheet when running at 3.3V versus 5V.
This page consolidates distributor pricing, lifecycle/sourcing information, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
Alternativas directas para MC9S08SE4CRL — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con MC9S08SE4CRL (mismo factor de forma y huella) — difiere en Debug Interface, Mounting Type, Package.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MC9S08SE8CRL
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MC9S08SE4CRL Valores máximos y características eléctricas
| Core Processor | S08 (HCS08) |
| Core Size | 8-Bit |
| CPU Frequency | 20 MHz |
| Internal Bus Frequency | 10 MHz |
| Program Memory Type | FLASH |
| Program Memory Size | 4 KB (4K x 8) |
| Tensión de alimentación | 3.3 V / 5 V |
| Encapsulado | 28-PDIP (0.600 inch, 15.24 mm) |
| Tipo de montaje | Through Hole |
| Instruction Set | CISC (HC08 object-code compatible) |
| Series | S08SE (S08SE8 series) |
| Manufacturer Family | Freescale S08 5V MCU portfolio |
| Debug Interface | Background Debug Mode (BDM) |
| Packaging | Tube |
| Pin Pitch | 2.54 mm |
Guía de configuración de pines de MC9S08SE4CRL 28-pdip (0.600 inch, 15.24 mm)
Configuración de pines para MC9S08SE4CRL (encapsulado 28-pdip (0.600 inch, 15.24 mm)). Este CI digital incluye GPIO, interfaces de comunicación (UART, SPI, I2C) y pines de alimentación. Consulte la hoja de datos del fabricante para conocer las funciones alternativas de los pines y las opciones de configuración. Esencial para el diseño de sistemas embebidos y el diseño de PCB.
No hay datos detallados de patillaje disponibles para MC9S08SE4CRL.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
MC9S08SE4CRL es adecuado para 6 aplicacións: Small Home Appliance Control, Battery Charger Control, Legacy 5V Industrial Board Replacement, Simple Motor Control, Embedded Education and Prototyping, Low-Cost Industrial Sensor Node.
Small Home Appliance Control
The MC9S08SE4CRL fits small appliance control boards such as kettles, fans, and coffee makers where a simple state machine, button scanning, and relay or LED driving are the main tasks. Its 20 MHz HCS08 core executes deterministic 8-bit control loops, while the 4 KB FLASH accommodates compact firmware for timing, temperature thresholds, and user interfaces. The 5V-capable I/O drives relays and indicator LEDs without level shifting, and the through-hole 28-pin PDIP package simplifies hand assembly and rework in low-volume production. Designers should budget flash carefully, as 4 KB constrains complex menus or multi-language strings; the pin-compatible MC9S08SE8CRL doubles memory on the same footprint if firmware grows.
Recomendado
Battery Charger Control
In low-cost battery chargers, the MC9S08SE4CRL supervises charge phases by reading an ADC channel, driving a PWM output, and terminating charge on timeout or threshold. The S08SE family's integrated timers and serial interface (consult the datasheet for the exact peripheral configuration of this variant) eliminate external controller logic, keeping the bill of materials minimal. Operating from a 5V supply allows direct interfacing with common charger front-ends, and 3.3V operation supports lower-voltage designs. Because charger firmware is typically under 4 KB, the SE4's memory is usually sufficient; the background debug mode (BDM) port enables in-circuit tuning of charge parameters during development without removing the device from the board.
Recomendado
Legacy 5V Industrial Board Replacement
The S08SE family was designed by Freescale for excellent compatibility with its 5V MCU portfolio, including pin, peripheral, and tool compatibility, making the MC9S08SE4CRL a natural successor for boards originally built around HC08 devices. Existing HC08 assembly or C code ports with minimal modification thanks to HC08 object-code compatibility, and the same 28-pin PDIP footprint allows rework onto existing through-hole PCBs. Maintenance engineers repairing aging industrial controllers benefit from the 5V-tolerant I/O that interfaces directly with legacy logic and from BDM-based flashing during field updates. Verify end-of-life sourcing through Rochester Electronics or Flip Electronics, which stock this part as of 2026-10-18.
Recomendado
Simple Motor Control
For small DC or stepper motor applications - fans, pumps, actuator drives - the MC9S08SE4CRL provides timer channels capable of PWM generation and a fast 20 MHz core for closed-loop speed or position control. The 4 KB FLASH is adequate for basic PID or ramp profiles, and deterministic 8-bit execution at a 10 MHz internal bus gives predictable interrupt latency for commutation tasks. The PDIP package's 2.54 mm pitch eases prototyping of driver stages on the same breadboard-friendly layout. Ensure adequate decoupling near the MCU supply pins because motor switching noise couples into the ADC reference; the S08SE datasheet's power management chapter details recommended bypassing for noisy loads.
Recomendado
Embedded Education and Prototyping
The 28-pin PDIP package with 2.54 mm pin pitch makes the MC9S08SE4CRL ideal for teaching 8-bit embedded programming: it plugs into breadboards and socketed training boards, tolerates repeated insertion cycles, and can be replaced cheaply when damaged. The HC08-compatible instruction set provides a gentle, well-documented assembly learning curve, while the on-chip background debug module (BDM) allows non-intrusive debugging with inexpensive legacy Freescale probes and CodeWarrior. The 3.3V/5V dual-supply capability lets students explore both modern and legacy logic levels. The 4 KB FLASH is intentionally small, encouraging efficient code - a valuable pedagogical constraint - with the SE8 variant available for projects that outgrow it.
Recomendado
Low-Cost Industrial Sensor Node
In simple sensor front-end nodes - temperature, presence, limit switches - the MC9S08SE4CRL digitizes analog inputs, applies threshold or averaging logic, and reports over a serial interface using the S08SE family's on-chip communication peripherals. Its 5V operation matches many industrial sensors' output ranges directly, and the 20 MHz core handles filtering with ample margin. The 4 KB FLASH suits fixed-function firmware, and low cost supports deployment across large installed bases. Because the part is end-of-life, design the socket footprint to accept both the SE4 and the pin-compatible SE8CRL so future service replacements can adopt the higher-memory variant without PCB changes; both share identical pinout and supply requirements per the S08SE datasheet.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MC9S08SE4CRL — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MC9S08SE8CRL |
|---|---|---|
| Package | 28-PDIP (0.600 inch, 15.24 mm) | 28-PDIP (0.600 inch) - same |
| Brand | NXP Semiconductors (Freescale) | NXP Semiconductors (Freescale) |
| FLASH Memory | 4 KB (4K x 8) | 8 KB (8K x 8) |
| Core / Frequency | S08 8-bit, 20 MHz | S08 8-bit, 20 MHz |
| Supply Voltage | 3.3 V / 5 V | 3.3 V / 5 V |
| Instruction Set Compatibility | HC08 object-code compatible (CISC) | HC08 object-code compatible (CISC) |
| Mounting Type | Through Hole | Through Hole |
Diferenciadores clave
- Lowest memory density in the S08SE series (frente a MC9S08SE8CRL)
- Through-hole 28-pin PDIP package (frente a MC9S08SE8CRL)
- HC08 object-code compatibility at 5V (frente a MC9S08SE8CRL)
Notas de diseño
This part is end-of-life at the original Freescale/NXP channel. Current stock comes from aftermarket and excess sources (Rochester Electronics LLC and Flip Electronics on DigiKey, plus Mouser, LCSC, Hotenda). For production designs, qualify at least two of these sources and consider designing the PCB socket/footprint to accept the pin-compatible MC9S08SE8CRL (8 KB FLASH) so future service builds can substitute the higher-memory variant if SE4 stock dries up.
The MC9S08SE4CRL supports dual-supply operation at 3.3V and 5V per distributor parametric data. Supply voltage affects maximum CPU frequency, I/O drive strength, and ADC reference range, so verify all supply-dependent limits in the S08SE Technical Data sheet for your chosen operating point before locking the design. Place 0.1 uF ceramic decoupling capacitors directly across the VDD/VSS pin pairs and a bulk capacitor near the regulator to handle FLASH erase/write current surges during in-circuit programming.
The 28-pin PDIP (0.600 inch / 15.24 mm) through-hole package with 2.54 mm pin pitch makes layout simple, but for reliable in-circuit programming and debugging, bring the background debug mode (BDM) signals to a standard 6-pin BDM header on the PCB. Keep oscillator traces short and guard them from switching loads such as relay or motor drivers. Socketed DIP footprints should use dual-wipe sockets to maintain contact integrity over repeated firmware updates in prototyping.
Información de cumplimiento
Compliance data was not present in the verified web data retrieved; legacy Freescale-era PDIP parts may be non-RoHS (lead-bearing) - verify against NXP's official compliance documentation before use in RoHS-restricted applications.
