MC9S08QG4CPAE - 8-bit HCS08 MCU, 4KB Flash, 20MHz | NXP
N.º de pieza: MC9S08QG4CPAE ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.85 | $2,85 |
| 10 | $2.52 | $25,20 |
| 100 | $2.18 | $218,00 |
| 500 | $1.92 | $960,00 |
| 1.000 | $1.71 | $1.710,00 |
MC9S08QG4CPAE Descripción general
An 8-bit microcontroller is a small, single-chip computer built around an 8-bit data path that integrates a CPU, non-volatile program memory (typically Flash), volatile data memory (RAM), peripherals such as timers and ADC channels, and digital I/O into one package. Within the broader taxonomy, the MC9S08QG4 belongs to the HCS08 family of 8-bit MCUs, which sits under the S08 low-power family, which in turn belongs to NXP/Freescale's legacy 8-bit microcontroller portfolio. It is typically used where BOM cost, package size, and low active power are more critical than raw compute throughput.
Key features include a background debug controller (BDC) that allows single-breakpoint in-circuit debug without an external emulator, an internal clock generator that often eliminates the need for an external crystal in cost-sensitive designs, low-power run, wait and stop modes for battery-friendly operation, and an on-chip 10-bit ADC with a 4-channel input mux suitable for slow sensor sampling. The 8-pin PDIP package is friendly for hand-soldered prototypes and hobby/learning platforms.
Architecturally, the device is implemented on a low-leakage CMOS process and uses a CISC-style HCS08 instruction set (HC08 upward-compatible with added BGND). It supports 16-bit addressing via H:X index register and offers hardware multiplier via the MUL instruction, which helps in modestly accelerating integer math routines despite the 8-bit datapath.
Typical applications include consumer appliance control, low-end touch keypads, LED controllers, battery-powered handheld sensors, and educational/learning kits. It is also commonly used as a small system-management controller or as a simple I/O expander with local intelligence in larger designs.
Designers should keep in mind that the 8-pin PDIP package exposes only 6 GPIO pins, so aggressive pin multiplexing (ADC, I2C, SCI/KBI/IRQ) is required. Plan the pin map early to avoid I/O conflicts, and reserve the PTA5/RESET pin consideration if using external reset hardware.
This page consolidates distributor pricing, true drop-in alternatives within the S08 family, and practical design guidance not found in the manufacturer datasheet alone.
Alternativas directas para MC9S08QG4CPAE — 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 MC9S08QG4CPAE (mismo factor de forma y huella) — difiere en Package, Mounting Type, ADC, Communication, I/O Pins.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MC9S08QG8CPAE
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MC9S08QA4CPAE
✅ Sustitución directa✓ En stock
$1.6667 / unidad
Ver hoja de datos →MC9S08QA2CPAE
✅ Sustitución directa✓ En stock
$1.55 / unidad
Ver hoja de datos →MC9S08QG4CPAE Valores máximos y características eléctricas
| Core Architecture | HCS08 (8-bit, enhanced HC08 core) |
| Maximum CPU Frequency | 20 MHz |
| Program Memory (Flash) | 4 KB (4K x 8) |
| RAM | 256 B |
| Supply Voltage Range | 1.8 V to 3.6 V |
| I/O Pins | 6 |
| ADC | 10-bit, 4-channel |
| Encapsulado | 8-pin PDIP (CPAE) |
| Tipo de montaje | Through-Hole |
| Debug Interface | Background Debug Controller (BDC), single breakpoint |
| Internal Clock | Yes (ICS with FLL, often removes need for external crystal) |
| Timers | TPM (Timer/PWM Module) |
| Communication | SCI (UART), optional I2C(2) |
| Temperatura de funcionamiento | -40 C to +85 C (industrial) |
| Estado RoHS | Compliant |
Configuración de pines de MC9S08QG4CPAE
| Pin 1 | PTB5/KBI1P5/TCLK/RESET — General-purpose I/O / Keyboard interrupt / Timer clock / Reset (shared) |
| Pin 2 | PTB4/KBI1P4/ADP5 — GPIO / KBI / ADC channel 5 |
| Pin 3 | VDD — Positive supply voltage (1.8 V to 3.6 V) |
| Pin 4 | VSS — Ground |
| Pin 5 | PTA5/IRQ/TCLK/RESET — GPIO / External interrupt / Timer clock / Reset |
| Pin 6 | PTA4/ADP4 — GPIO / ADC channel 4 |
| Pin 7 | PTA3/ADP3 — GPIO / ADC channel 3 |
| Pin 8 | PTA0/ADP0 — GPIO / ADC channel 0 |
Aplicaciones típicas
MC9S08QG4CPAE es adecuado para 7 aplicacións: Battery-powered sensor nodes, Consumer appliance control, LED lighting controllers, Remote controls / IR emitters, Educational / learning platforms, HVAC thermostat sub-controllers, Toy and hobby electronics.
Battery-powered sensor nodes
Why MC9S08QG4CPAE fits: the device's 1.8 V to 3.6 V supply range and sub-microamp stop-mode currents let it run directly from a single-cell Li-ion or 2x AA battery, while the 4-channel 10-bit ADC samples temperature, light, or other low-bandwidth sensors without an external analog front end. How it is used: the firmware wakes on ADC completion or KBI interrupt, takes a reading, and returns to stop mode; the 256-byte RAM is sufficient for sliding-window sensor averaging. Trade-off vs alternatives: the PIC12F1822 in PDIP-8 offers a more sophisticated ADC with auto-acquisition but at higher cost; the MC9S08QG4CPAE wins on BOM cost and toolchain maturity for simple sensor duty cycles.
Recomendado
Consumer appliance control
Why MC9S08QG4CPAE fits: its 20 MHz HCS08 core executes small control loops (PWM, sensor polling, button handling) with deterministic timing; 4 KB Flash covers typical washing-machine or microwave UI logic, and the 8-pin PDIP through-hole package supports hand-soldered low-volume assembly. How it is used: the TPM drives TRIAC or MOSFET control, KBI pins handle front-panel buttons, and SCI connects to a main board MCU. Trade-off vs alternatives: the larger QG8 (8 KB Flash) variant supports richer UI; the QG4 wins on cost when the UI is minimal.
Recomendado
LED lighting controllers
Why MC9S08QG4CPAE fits: the TPM provides PWM channels suitable for LED dimming control, while the 6 GPIOs can drive indicator LEDs, sense a photosensor via ADC, and read a tactile button. How it is used: firmware uses the TPM PWM channel to dim a constant-current LED driver; the ADC samples a light sensor and closes a daylight-harvesting loop. Trade-off vs alternatives: the S08 core's deterministic interrupt latency simplifies zero-crossing detection versus higher-end Cortex-M0 parts.
Recomendado
Remote controls / IR emitters
Why MC9S08QG4CPAE fits: the 8-bit core can sustain IR carrier generation via timer interrupts at low power; the 256-byte RAM holds short IR command buffers, and the 1.8 V minimum supply works directly with a single CR2032 coin cell. How it is used: KBI wakes the MCU on key press, the TPM modulates a 38 kHz carrier on a GPIO, and stop mode drops current to sub-1 uA between keystrokes. Trade-off vs alternatives: PIC12F1822 offers PWM-dedicated peripherals; the QG4 wins on NXP ecosystem familiarity.
Recomendado
Educational / learning platforms
Why MC9S08QG4CPAE fits: the 8-pin PDIP form factor drops directly into a breadboard and is hand-solderable, while CodeWarrior for S08 and the on-chip BDC provide a low-cost debug entry point. How it is used: instructors teach register-level GPIO, ADC, and timer programming without the toolchain overhead of ARM Cortex. Trade-off vs alternatives: PIC and AVR have larger hobby followings, but the QG4's on-chip BDC debug and free NXP tools remain attractive.
Recomendado
HVAC thermostat sub-controllers
Why MC9S08QG4CPAE fits: it can read a thermistor via the 10-bit ADC, drive a relay or TRIAC via GPIO, and communicate to a main thermostat board over UART (SCI), all in a small 8-pin PDIP that fits behind the wall plate. How it is used: firmware samples temperature periodically, applies hysteresis, and toggles a heat-call relay; SCI links to the main UI MCU for setpoint updates. Trade-off vs alternatives: MCUs with more GPIO would skip external muxing; the QG4 is ideal for one-zone thermostats.
Recomendado
Toy and hobby electronics
Why MC9S08QG4CPAE fits: the 4 KB Flash stores complex motion sequences or sound-effect triggers, and the HCS08 core runs small motor-control loops for servo or DC-motor toys. How it is used: a 6-pin GPIO bank connects to servos, an ADC input reads a potentiometer or simple sensor, and stop mode powers the toy down between interactions. Trade-off vs alternatives: cheaper 8-bit parts exist but lack BDC debug; the QG4's on-chip debug cuts prototype iteration time significantly.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MC9S08QG4CPAE — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MC9S08QG4MDTE | MC9S08QG8CPAE | MC9S08QG8MDTE | MC9S08QA4CPAE | MC9S08QA2CPAE |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | PDIP-8 (CPAE) | TSSOP-8 (cross-package) | PDIP-8 (CPAE) - same | TSSOP-8 (cross-package) | PDIP-8 (CPAE) - same | PDIP-8 (CPAE) - same |
| Core | HCS08 | HCS08 | HCS08 | HCS08 | S08QA | S08QA |
| Max CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Flash Memory | 4 KB | 4 KB | 8 KB (+100%) | 8 KB (+100%) | 4 KB | 2 KB (-50%) |
| RAM | 256 B | 256 B | 512 B | 512 B | 256 B | 128 B |
| ADC | 10-bit, 4-ch | 10-bit, 4-ch | 10-bit, 4-ch | 10-bit, 4-ch | 10-bit, 4-ch | 10-bit, 4-ch |
| Supply Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| I/O Pins | 6 | 6 | 6 | 6 | 6 | 6 |
| Approx. Unit Price (USD) | $2.85 (qty 1) | ~$2.85 | ~$3.20 | ~$3.20 | ~$2.40 | ~$2.10 |
Diferenciadores clave
- Smaller Flash than QG8 in the same package (frente a MC9S08QG8CPAE)
- Lower-power family option (frente a MC9S08QA4CPAE)
- Through-hole PDIP for prototyping (frente a MC9S08QG4MDTE (TSSOP-8))
- On-chip BDC debug (frente a MC9S08QA2CPAE)
Notas de diseño
Only 6 GPIOs are exposed in the 8-pin PDIP package; pin 1 (PTB5/RESET) and pin 5 (PTA5/IRQ/RESET) are shared with reset/interrupt functions. Plan the pin map during schematic capture, not after layout - reassigning PTA4 vs PTA0 vs PTA3 between ADC inputs and GPIO outputs is much harder once the PCB is fab'd.
Add a 100 nF decoupling capacitor as close as possible to VDD (pin 3) with a short ground return to VSS (pin 4). For designs with stop-mode entry/exit, place a bulk 1 uF to 10 uF capacitor on VDD to handle the small inrush during oscillator restart, otherwise you may see brown-out resets on wake.
Route the RESET line carefully if used in external-reset mode; keep it short and avoid running parallel to switching traces to prevent false resets. Through-hole PDIP simplifies prototype rework but is more susceptible to ESD on long, exposed leads - consider adding a TVS diode or series resistor on RESET for harsh environments.
The internal clock source (ICS with FLL) is accurate enough for UART up to ~57600 baud at room temperature, but at 115200 baud it may require an external crystal on PTA4/PTA3 (or PTA5/PTA4 depending on family variant). If your design needs reliable RS-485 or DMX512 communications, budget for an external 4 MHz to 8 MHz crystal rather than relying on the trimmed internal reference.
The 8-pin PDIP is a plastic through-hole package with low thermal resistance (~150 C/W junction-to-ambient for the bare package), but the part still has a maximum junction temperature of 150 C. At room temperature, power consumption is dominated by I/O sink/source current rather than core switching, so avoid sourcing more than the rated 10 mA per pin (25 mA total package) without thermal verification.
Información de cumplimiento
RoHS compliant per NXP product page (Pb-free 'E' suffix). Not AEC-Q100 qualified; choose S12/S32K family for automotive. REACH and conflict-mineral compliance inferred from NXP corporate statements.
