Renesas UPD78F1146AGK(R)-GAJ-AX

Overview

UPD78F1146AGK(R)-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 modules. It operates at up to 20 MHz with supply voltage range 2.7–5.5 V and targets embedded control in industrial sensors and motor drive interfaces.

For engineers reviewing the UPD78F1146AGK(R)-GAJ-AX datasheet, UPD78F1146AGK(R)-GAJ-AX pinout, UPD78F1146AGK(R)-GAJ-AX application, or UPD78F1146AGK(R)-GAJ-AX equivalent, key selection criteria include Flash endurance (100k write/erase cycles), operating temperature range (−40°C to +85°C), and support for on-chip debug via single-wire interface.

Technical Context

The UPD78F1146AGK(R)-GAJ-AX implements the 78K0R CPU core with 16-bit architecture, Harvard memory organization, and instruction set compatible with earlier 78K0 devices. It integrates a 10-bit successive-approximation ADC with sample-and-hold and programmable conversion start triggers.

Peripheral configuration includes three 16-bit timer/counters (with PWM output capability), two serial interfaces (UART and I²C), and a watchdog timer with independent clock source. The device supports low-power modes including HALT and STOP with wake-up via external interrupt or peripheral event.

Key Specifications

Pinout & Package

The UPD78F1146AGK(R)-GAJ-AX is housed in a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad for enhanced heat dissipation in continuous industrial operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10PLGKSP#V0 and MB9BF124RPMC-G-SNE2, the UPD78F1146AGK(R)-GAJ-AX delivers deterministic real-time response with minimal interrupt latency, optimized peripheral register layout for fast I/O toggling, and proven field reliability in cost-sensitive industrial controllers - making it ideal for established 78K0R-based platforms requiring long-term supply continuity.

Availability

UPD78F1146AGK(R)-GAJ-AX is available at Aetrix Electronics and suitable for industrial sensor nodes, BLDC motor controllers, and smart power meter interfaces requiring stable component supply across multi-year production cycles.

Supply support for UPD78F1146AGK(R)-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 specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The UPD78F1146AGK(R)-GAJ-AX belongs to the 78K0R/KE3 product line, designed specifically for cost-effective, high-reliability embedded control in industrial equipment where deterministic timing, peripheral integration, and long-term manufacturability are critical.

FAQ

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

The UPD78F1146AGK(R)-GAJ-AX operates at a maximum CPU frequency of 20 MHz, supported by its internal high-speed oscillator and PLL circuitry. This frequency enables real-time processing of ADC conversions, PWM updates, and serial protocol handling within tight timing constraints typical in motor control and sensor acquisition applications. The UPD78F1146AGK(R)-GAJ-AX maintains full functionality across its specified voltage and temperature range at this speed.

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

Yes, the UPD78F1146AGK(R)-GAJ-AX supports in-system programming via its on-chip bootloader, accessible through UART or dedicated SWD interface. Firmware updates can be performed without removing the device from the target board, using standard Renesas tools like PG-FP5 or third-party flash programmers compliant with the 78K0R protocol. The UPD78F1146AGK(R)-GAJ-AX includes Flash lock bits to prevent unauthorized ISP access after production programming.

What is the ADC accuracy specification for the UPD78F1146AGK(R)-GAJ-AX?

The UPD78F1146AGK(R)-GAJ-AX features a 10-bit successive-approximation ADC with ±2 LSB integral nonlinearity (INL) and ±1.5 LSB differential nonlinearity (DNL) over the full operating temperature range. Its effective number of bits (ENOB) is 9.2 bits at 100 kSPS, and it supports programmable sampling time to optimize SNR for varying source impedances. These specifications are confirmed in the official Renesas Electrical Characteristics table for the UPD78F1146AGK(R)-GAJ-AX.

Can the UPD78F1146AGK(R)-GAJ-AX operate from a 3.3 V supply only?

Yes, the UPD78F1146AGK(R)-GAJ-AX operates reliably from a single 3.3 V supply across its full industrial temperature range (−40°C to +85°C). Both VDD and EVDD pins must be supplied at 3.3 V, and AVREF may be tied to VDD or driven externally for improved ADC accuracy. The UPD78F1146AGK(R)-GAJ-AX meets all DC and AC electrical specifications at 3.3 V, including I/O voltage levels compatible with standard 3.3 V logic families.

Is there a migration path from the UPD78F1146AGK(R)-GAJ-AX to newer Renesas MCUs?

Renesas offers the RL78/G13 series (e.g., R5F10PLGKSP#V0) as a functional migration path for the UPD78F1146AGK(R)-GAJ-AX, retaining similar peripheral sets, memory sizes, and pin-compatible variants in some packages. Migration requires toolchain and register-level adaptation due to architectural differences, but Renesas provides compatibility libraries and migration guides. The UPD78F1146AGK(R)-GAJ-AX remains in active production with long-term availability commitment per Renesas Product Longevity Program.