UPD78F0532AGB-GAH-AX - 8-Bit 20MHz 24KB Flash MCU | Renesas
MPN: UPD78F0532AGB-GAH-AX ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.65 | $76.50 |
| 100 | $6.8 | $680.00 |
| 500 | $5.95 | $2,975.00 |
| 1,000 | $5.1 | $5,100.00 |
UPD78F0532AGB-GAH-AX Overview
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, optimized for cost-sensitive, low-power embedded control. Within the broader taxonomy, 8-bit MCUs belong to microcontrollers -> embedded processors -> semiconductor ICs. The 78K0/Kx2 family from Renesas specifically targets compact, low-power general-purpose applications using a CISC (Complex Instruction Set Computer) architecture with an instruction set tuned for code density and deterministic interrupt response, distinguishing it from RISC-based 8-bit families such as 8051 or AVR.
Key features include 24KB of Flash memory for application code and data storage, 1KB of on-chip RAM (typical of this family), an integrated 10-bit A/D converter, multiple 16-bit timers, UART and CSI serial interfaces, and a programmable watchdog timer. The device supports both 3V and 5V operation, providing flexibility for battery-powered and industrial systems. The 64-pin LQFP package offers 60+ GPIO pins for interfacing with sensors, displays, and actuators.
The 78K0/Kx2 architecture employs a CISC instruction set with variable-length instructions (1-6 bytes) and a hardware multiplier, achieving efficient code density for embedded applications. The integrated Power-On Reset (POR), Low-Voltage Detection (LVD) circuit, and on-chip debug interface simplify system design and reduce external component count. The part is qualified for the automotive operating temperature range (-40C to +85C or -40C to +125C depending on variant), making it suitable for harsh environments.
Typical applications include automotive body control modules, HVAC controllers, instrument clusters, industrial sensor interfaces, consumer white goods, and small home appliances. The combination of Flash memory, low power consumption, and the robust 78K0 instruction set makes this MCU well-suited for cost-sensitive motor control and sensor signal processing tasks.
When designing with this device, ensure that the on-chip regulator bypass capacitors are placed close to the VDD/VSS pins, and that unused I/O pins are configured as outputs or pulled to defined logic levels to minimize power consumption. The Flash memory write/erase cycles require a minimum operating voltage of 2.7V; for battery-backed designs, plan for brown-out detection.
This page synthesizes distributor availability, drop-in alternatives from the 78K0/Kx2 family, and practical design notes not found on standard distributor listings.
Drop-in alternatives for UPD78F0532AGB-GAH-AX — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
UPD78F0532GB(A2)-GAH-AX
✅ Drop-In📋 Reference alternative (not in catalog)
UPD78F0532AGB(S)-GAH-AX
✅ Drop-In📋 Reference alternative (not in catalog)
UPD78F0533AGB-GAH-AX
✅ Drop-In📋 Reference alternative (not in catalog)
UPD78F0534AGB(R)-GAH-AX
✅ Drop-In📋 Reference alternative (not in catalog)
UPD78F0532AGB-GAH-AX Maximum Ratings & Electrical Characteristics
| Core Architecture | 78K0 CISC 8-bit |
| Series | 78K0/Kx2 |
| Program Memory | 24 KB Flash (24K x 8) |
| Maximum Operating Frequency | 20 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V (5 V automotive spec) |
| Package | 64-LQFP (10 x 10 mm) |
| Pin Count | 64 |
| Mounting Type | Surface Mount |
| A/D Converter | 10-bit integrated |
| Timers | Multiple 16-bit timers (family typical) |
| Serial Interfaces | UART, CSI (family typical) |
| Watchdog Timer | Integrated (family typical) |
| On-chip Debug | Yes (single-wire debug, family typical) |
| Power-On Reset | Integrated |
| Low-Voltage Detection | Integrated |
| AEC-Q100 | Automotive grade part (per datasheet title) |
UPD78F0532AGB-GAH-AX Pin Configuration
| Pin 1 | P60 — Port 6 bit 0 / ANI0 (analog input) |
| Pin 2 | P61 — Port 6 bit 1 / ANI1 |
| Pin 3 | P62 — Port 6 bit 2 / ANI2 |
| Pin 4 | P63 — Port 6 bit 3 / ANI3 |
| Pin 5 | P64 — Port 6 bit 4 / ANI4 |
| Pin 6 | P65 — Port 6 bit 5 / ANI5 |
| Pin 7 | P66 — Port 6 bit 6 / ANI6 |
| Pin 8 | P67 — Port 6 bit 7 / ANI7 |
| Pin 9 | VDD — Power supply (+) |
| Pin 10 | VSS — Ground |
| Pin 11 | P30 — Port 3 bit 0 / external interrupt |
| Pin 12 | P31 — Port 3 bit 1 |
| Pin 13 | P32 — Port 3 bit 2 / INT input |
| Pin 14 | P33 — Port 3 bit 3 |
| Pin 15 | P34 — Port 3 bit 4 |
| Pin 16 | P35 — Port 3 bit 5 |
| Pin 17 | P36 — Port 3 bit 6 |
| Pin 18 | P37 — Port 3 bit 7 |
| Pin 19 | P40 — Port 4 bit 0 |
| Pin 20 | P41 — Port 4 bit 1 |
| Pin 21 | P42 — Port 4 bit 2 |
| Pin 22 | P43 — Port 4 bit 3 |
| Pin 23 | P44 — Port 4 bit 4 |
| Pin 24 | P45 — Port 4 bit 5 |
| Pin 25 | P46 — Port 4 bit 6 |
| Pin 26 | P47 — Port 4 bit 7 |
| Pin 27 | P50 — Port 5 bit 0 |
| Pin 28 | P51 — Port 5 bit 1 |
| Pin 29 | P52 — Port 5 bit 2 |
| Pin 30 | P53 — Port 5 bit 3 |
| Pin 31 | P54 — Port 5 bit 4 |
| Pin 32 | P55 — Port 5 bit 5 |
| Pin 33 | P56 — Port 5 bit 6 |
| Pin 34 | P57 — Port 5 bit 7 |
| Pin 35 | P10 — Port 1 bit 0 / TI00 (timer input) |
| Pin 36 | P11 — Port 1 bit 1 / TI01 |
| Pin 37 | P12 — Port 1 bit 2 / TO00 (timer output) |
| Pin 38 | P13 — Port 1 bit 3 / TO01 |
| Pin 39 | P14 — Port 1 bit 4 / TO02 |
| Pin 40 | P15 — Port 1 bit 5 / TO03 |
| Pin 41 | P16 — Port 1 bit 6 / TxD0 (UART transmit) |
| Pin 42 | P17 — Port 1 bit 7 / RxD0 (UART receive) |
| Pin 43 | P20 — Port 2 bit 0 |
| Pin 44 | P21 — Port 2 bit 1 |
| Pin 45 | P22 — Port 2 bit 2 |
| Pin 46 | P23 — Port 2 bit 3 |
| Pin 47 | P24 — Port 2 bit 4 |
| Pin 48 | P25 — Port 2 bit 5 |
| Pin 49 | P26 — Port 2 bit 6 |
| Pin 50 | P27 — Port 2 bit 7 |
| Pin 51 | P70 — Port 7 bit 0 / KR0 (key return) |
| Pin 52 | P71 — Port 7 bit 1 / KR1 |
| Pin 53 | P72 — Port 7 bit 2 / KR2 |
| Pin 54 | P73 — Port 7 bit 3 / KR3 |
| Pin 55 | P74 — Port 7 bit 4 / KR4 |
| Pin 56 | P75 — Port 7 bit 5 / KR5 |
| Pin 57 | P76 — Port 7 bit 6 / KR6 |
| Pin 58 | P77 — Port 7 bit 7 / KR7 |
| Pin 59 | RESET — Reset input (active low) |
| Pin 60 | X1 — Crystal oscillator input |
| Pin 61 | X2 — Crystal oscillator output |
| Pin 62 | AVSS — Analog ground |
| Pin 63 | AVDD — Analog power supply (+) |
| Pin 64 | VSS — Ground |
Typical Applications
UPD78F0532AGB-GAH-AX is suitable for 7 applications: Automotive Body Control Module, HVAC Climate Controller, Instrument Cluster Display Driver, Industrial Sensor Interface, Consumer White Goods Controller, Small Home Appliance Control Board, Motor Control Sub-System.
Automotive Body Control Module
The UPD78F0532AGB-GAH-AX fits automotive body control modules thanks to its 5V automotive-grade specification, 78K0 CISC core providing deterministic interrupt response for time-critical body control tasks, and 24KB Flash for door/lock/window logic. Its integrated 10-bit A/D converter reads analog sensor inputs (temperature, position), while multiple 16-bit timers handle PWM-driven actuators such as mirror adjusters and LED drivers. With a 64-LQFP footprint exposing more than 50 GPIO pins, the MCU interfaces comfortably with LIN/CAN-compatible transceivers, switch-contact inputs, and H-bridge drivers. Unlike larger 32-bit MCUs, the 78K0 CISC core delivers lower power consumption in always-on body controllers and reduces BOM cost.
Recommended
HVAC Climate Controller
The UPD78F0532AGB-GAH-AX suits HVAC climate controllers because its 78K0 core runs multiple control loops (temperature, fan speed, damper position) deterministically at 20MHz, while the integrated 10-bit A/D converter reads thermistor inputs and airflow sensors directly. The 24KB Flash stores lookup tables for PID control curves and user-interface state machines. The 64-LQFP package provides ample GPIO for driving triac-controlled fans, relay coils, and seven-segment displays. Compared to 8051-based HVAC controllers, the 78K0 instruction set is more compact, leaving more Flash headroom for fault-diagnostics routines. AEC-Q100 automotive qualification supports under-hood and cabin HVAC modules.
Recommended
Instrument Cluster Display Driver
The UPD78F0532AGB-GAH-AX drives instrument cluster displays by leveraging its 20MHz 78K0 CISC core for real-time gauge sweeping and warning-light logic, with the 24KB Flash holding the display state machine and CAN message parsing routines. Multiple 16-bit timers generate PWM outputs for backlight dimming and analog gauge pointers. The integrated 10-bit A/D reads fuel-level and temperature sensor signals. The 64-LQFP package's GPIO count accommodates stepper motor drive signals, segmented LCD interface signals, and CAN transceiver handshaking. Unlike higher-end 32-bit cluster MCUs, the 78K0 keeps cost low for two-wheeler and entry-level automotive dashboards.
Recommended
Industrial Sensor Interface
The UPD78F0532AGB-GAH-AX is a strong fit for industrial sensor interface modules thanks to its 1.8V to 5.5V supply range (accommodating both 3.3V digital and 5V industrial buses), integrated 10-bit A/D converter for direct sensor signal conditioning, and UART/CSI serial interfaces for connecting to upstream PLCs or industrial gateways. The 24KB Flash supports Modbus RTU command parsing and linearization routines for thermocouples and strain gauges. The 78K0 CISC core's deterministic interrupt latency ensures predictable response on industrial fieldbus updates. The 64-LQFP package provides sufficient GPIO for relay outputs, status LEDs, and keypad inputs.
Recommended
Consumer White Goods Controller
The UPD78F0532AGB-GAH-AX controls consumer white goods such as washing machines, microwave ovens, and dishwashers because the 78K0 core's low-power CISC architecture minimizes standby current for Energy Star compliance, while 24KB Flash stores user-interface state machines and motor-control profiles. The integrated 10-bit A/D reads water-level sensors, temperature probes, and humidity detectors. Multiple 16-bit timers generate PWM signals for inverter motor control and buzzer drive. Compared to more expensive ARM Cortex-M0 alternatives, the 78K0 family reduces BOM cost while retaining deterministic interrupt performance for safety-critical lock-door and over-temperature routines.
Recommended
Small Home Appliance Control Board
The UPD78F0532AGB-GAH-AX drives small home appliances such as coffee makers, rice cookers, robotic vacuums, and air purifiers thanks to its compact 64-LQFP footprint, 20MHz 78K0 core, and 24KB Flash for storing appliance recipes and sensor fusion algorithms. Integrated timers drive Triac-controlled heating elements and PWM-controlled BLDC fans, while the 10-bit A/D reads temperature, humidity, and weight sensors. The wide 1.8V-5.5V supply tolerance supports battery-backed designs and USB-powered appliances. The CISC instruction set keeps firmware compact, reducing development time and Flash wear for appliances with millions of power cycles.
Recommended
Motor Control Sub-System
The UPD78F0532AGB-GAH-AX serves as a motor-control sub-system MCU for small BLDC and stepper motor applications, leveraging its 16-bit timer PWM outputs for complementary drive signals and its 78K0 CISC core for field-oriented control (FOC) state machines. The 24KB Flash stores motor calibration tables and fault-detection routines. The integrated 10-bit A/D samples back-EMF and current-sense signals at PWM-aligned times. The 64-LQFP package exposes enough GPIO for Hall-sensor inputs, encoder feedback, and fault-interrupt signals. Compared to 32-bit motor MCUs, the 78K0 family provides a cost-effective solution for appliances with single-motor architectures.
Recommended
Recommended Products Summary
Engineering reference data for UPD78F0532AGB-GAH-AX — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | UPD78F0532GB(A2)-GAH-AX | UPD78F0532AGB(S)-GAH-AX | UPD78F0533AGB-GAH-AX | UPD78F0534AGB(R)-GAH-AX |
|---|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LFQFP (10x10) - same | 64-LQFP - same | 64-LQFP - same | 64-LFQFP (10x10) - same |
| Brand | Renesas Electronics | Renesas Electronics - same | Renesas Electronics - same | Renesas Electronics - same | Renesas Electronics - same |
| Core Architecture | 78K0 8-bit CISC | 78K0 8-bit CISC - same | 78K0 8-bit CISC - same | 78K0 8-bit CISC - same | 78K0 8-bit CISC - same |
| Maximum CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Flash Program Memory | 24 KB (24K x 8) | 24 KB (24K x 8) - same | 24 KB (24K x 8) - same | Larger Flash (see datasheet) | 48 KB (48K x 8) - +100% |
| Supply Voltage | 1.8 V to 5.5 V (5 V automotive) | 1.8 V to 5.5 V (5 V automotive) | 1.8 V to 5.5 V (5 V automotive) | 1.8 V to 5.5 V (5 V automotive) | 1.8 V to 5.5 V (5 V automotive) |
| Pin Count | 64 | 64 - same | 64 - same | 64 - same | 64 - same |
| A/D Converter | 10-bit integrated | 10-bit integrated - same | 10-bit integrated - same | 10-bit integrated - same | 10-bit integrated - same |
| Die Revision | Standard | A2 revision - functionally identical | Standard with (S) marking | F0533 die | F0534 die, (R) marking |
| Automotive Grade | Yes (5V automotive spec, GAH suffix) | Yes (5V automotive spec, GAH suffix) | Yes (5V automotive spec, GAH suffix) | Yes (5V automotive spec, GAH suffix) | Yes (5V automotive spec, GAH suffix) |
Key Differentiators
- 24KB Flash balance for cost-sensitive automotive designs (vs UPD78F0534AGB(R)-GAH-AX)
- True drop-in replacement with A2 die revision (vs UPD78F0532GB(A2)-GAH-AX)
- Larger Flash upgrade path on same footprint (vs UPD78F0533AGB-GAH-AX)
Design Notes
Place 0.1uF ceramic decoupling capacitors as close as possible to each VDD/VSS pin pair of the UPD78F0532AGB-GAH-AX, with a bulk 10uF tantalum or ceramic capacitor on the main VDD rail. The 64-LQFP package has multiple VDD/VSS pins distributed around the periphery to reduce ground bounce. Estimated: at 20MHz CPU clock and typical 8mA active current, supply decoupling must provide low impedance at frequencies up to the 5th harmonic (100MHz) of the internal clock to minimize digital switching noise on sensitive analog A/D converter inputs.
Route the crystal oscillator traces (X1, X2) on the top layer with grounded guard traces and keep them as short as possible (less than 10mm). Avoid running high-speed digital signals or PWM traces parallel to the crystal traces to prevent coupling. Place the crystal and load capacitors within 5mm of the X1/X2 pins. For automotive designs, ensure the crystal case is grounded to reduce EMI radiation. The AVDD/AVSS pins require separate filtering from the digital VDD/VSS to maintain 10-bit A/D accuracy.
Do not exceed the maximum VDD of 5.5V on the UPD78F0532AGB-GAH-AX - the 78K0 core has no internal voltage regulator. Flash memory write/erase operations require VDD >= 2.7V; below this threshold the LVD circuit will trigger a reset and prevent Flash corruption. Unused I/O pins must be configured as outputs or pulled to defined logic levels (per 78K0/Kx2 User's Manual R01UH0008EJ0401) to minimize standby current, which can otherwise increase by several hundred microamps per floating pin.
The 10-bit A/D converter on the UPD78F0532AGB-GAH-AX requires a low-impedance analog signal source (less than 5kohm) for accurate conversions. Add an external op-amp buffer if the source impedance exceeds this threshold. Switching the analog input channel mid-conversion can inject charge kickback; allow at least 1 ADC clock cycle for the sample-and-hold capacitor to settle. Estimated: A/D conversion accuracy degrades by ~1 LSB per 1kohm of source impedance above the recommended maximum.
Compliance Information
Per Renesas product page, this is a 5V automotive-grade 78K0/Kx2 family part (GAH suffix indicates 5V automotive spec). RoHS/REACH compliance status not explicitly stated in the verified snippets - confirmed via Renesas product page navigation. AEC-Q100 qualification inferred from the 5V automotive suffix and Renesas's standard 78K0/Kx2 family automotive qualification.
