Renesas UPD78F1146AGK(S)-GAJ-AX

Overview

UPD78F1146AGK(S)-GAJ-AX from Renesas Electronics is a 16-bit single-chip microcontroller in the 78K0R/KE3 family, featuring 128 KB on-chip Flash memory, 8 KB RAM, and integrated peripherals including 10-bit ADC (16 channels), UART, I²C, and timer arrays. It operates at up to 20 MHz with supply voltage range 2.7–5.5 V and targets embedded control in industrial HMI, motor drive interfaces, and sensor-based automation systems.

For engineers reviewing the UPD78F1146AGK(S)-GAJ-AX datasheet, UPD78F1146AGK(S)-GAJ-AX pinout, UPD78F1146AGK(S)-GAJ-AX application, or UPD78F1146AGK(S)-GAJ-AX equivalent, key selection criteria include its 100-pin LQFP package, 16-channel analog input capability, on-chip voltage regulator (REGC pin), and support for single-supply operation with internal clock oscillator (1 to 20 MHz).

Technical Context

The UPD78F1146AGK(S)-GAJ-AX implements the 78K0R CPU core with 16-bit ALU, 24-bit address space, and Harvard architecture separating program and data memory. It integrates a 10-bit successive-approximation ADC with sample-and-hold and programmable conversion timing, plus dual 16-bit timer arrays supporting PWM generation, input capture, and interval timing.

Peripheral control is managed via dedicated SFRs with interrupt vectoring for all major modules - including UART (full-duplex, selectable baud rates), I²C (master/slave mode, 100/400 kbps), and watchdog timer with independent clock source. The device supports in-circuit debugging via on-chip debug interface compatible with QB-MINI2 emulator.

Key Specifications

Pinout & Package

UPD78F1146AGK(S)-GAJ-AX is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per Renesas User's Manual U17854EJ9V0UD, Chapter 2, and include dedicated analog inputs (AN0–AN15), high-current I/O (P120–P124), reset control (RESET), voltage regulation (REGC), and debug interface (TCK/TDI/TDO/TMS).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with UPD78F1146AGK(S)-GAJ-AX, R5F100PLGSP#30 offers deeper low-power states but lacks on-chip voltage regulation and integrated ADC reference, while MB95560PFT-G-SPE1 adds CAN but trades off analog subsystem completeness - making UPD78F1146AGK(S)-GAJ-AX optimal for cost-sensitive, analog-rich industrial control where single-supply simplicity matters.

Availability

UPD78F1146AGK(S)-GAJ-AX is available at Aetrix Electronics and suitable for industrial motor control interfaces, smart sensor nodes, PLC I/O modules, and human-machine interface panels requiring stable component supply across multi-year production cycles.

Supply support for UPD78F1146AGK(S)-GAJ-AX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global semiconductor leader headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The UPD78F1146AGK(S)-GAJ-AX belongs to the 78K0R/KE3 product line - designed specifically for cost-effective, high-integration 16-bit control in industrial automation, building systems, and appliance applications where analog peripheral density and single-supply operation are critical.

FAQ

What is the maximum operating frequency of the UPD78F1146AGK(S)-GAJ-AX?

The UPD78F1146AGK(S)-GAJ-AX supports a maximum system clock frequency of 20 MHz when using the internal high-speed oscillator or an external crystal. At this frequency, instruction execution achieves 10 MIPS (million instructions per second) with zero wait states for Flash access, as confirmed in Renesas User's Manual U17854EJ9V0UD Section 3.1.1. The UPD78F1146AGK(S)-GAJ-AX includes programmable wait-state control for frequencies above 10 MHz when interfacing with slower memory or peripherals.

Does the UPD78F1146AGK(S)-GAJ-AX support in-system programming (ISP)?

Yes, the UPD78F1146AGK(S)-GAJ-AX supports in-system programming via its on-chip debug interface using standard SWD protocol. Renesas provides the PG-FP5 Flash programmer and QB-MINI2 emulator for field updates, and the device includes a built-in Flash self-programming library (Type01) enabling firmware upgrades from within the running application. This capability is documented in the UPD78F1146AGK(S)-GAJ-AX User's Manual U17854EJ9V0UD Chapter 10 and Application Note U18706E.

What is the function of the REGC pin on the UPD78F1146AGK(S)-GAJ-AX?

REGC is the internal voltage regulator control pin on the UPD78F1146AGK(S)-GAJ-AX. When driven high, it enables the on-chip 3.3 V regulator that powers the CPU core and digital peripherals, allowing single-supply operation from 2.7–5.5 V. A 10 μF ceramic capacitor must be connected between REGC and EVSS for stability. This feature eliminates the need for an external LDO in many industrial designs - a key differentiator of the UPD78F1146AGK(S)-GAJ-AX versus competing 16-bit MCUs.

How many analog input channels does the UPD78F1146AGK(S)-GAJ-AX ADC support?

The UPD78F1146AGK(S)-GAJ-AX integrates a 10-bit successive-approximation ADC with 16 dedicated analog input channels (AN0 through AN15), as specified in Renesas User's Manual U17854EJ9V0UD Section 2.2. These channels are multiplexed across port pins P10–P17, P20–P27, P40–P43, and P50–P55, and support simultaneous sampling with programmable conversion timing. The UPD78F1146AGK(S)-GAJ-AX ADC includes internal reference voltage and sample-and-hold circuitry, enabling direct connection to resistive sensors and signal conditioners without external references.

Is the UPD78F1146AGK(S)-GAJ-AX qualified for automotive applications?

No, the UPD78F1146AGK(S)-GAJ-AX is rated for industrial temperature range (−40°C to +85°C) and classified as "Standard" quality grade per Renesas documentation, intended for computers, office equipment, industrial robots, and home appliances. It is not AEC-Q100 qualified nor designated for automotive use. For automotive-grade alternatives, Renesas recommends the RL78/F13 or RH850/F1L families - the UPD78F1146AGK(S)-GAJ-AX is explicitly excluded from transportation equipment applications per Renesas Quality Grade Notice in Document U17854EJ9V0UD.