Renesas UPD78F1142AGK(S)-GAJ-AX

Overview

UPD78F1142AGK(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 (8 channels), UART, I²C, and 16-bit timer arrays. 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-driven appliances.

For engineers reviewing the UPD78F1142AGK(S)-GAJ-AX datasheet, UPD78F1142AGK(S)-GAJ-AX pinout, UPD78F1142AGK(S)-GAJ-AX application, or UPD78F1142AGK(S)-GAJ-AX equivalent, key selection criteria include its 64-pin LQFP package, 10-bit ADC resolution with sample-and-hold, dual UART support for serial diagnostics, and built-in voltage regulator (REGC pin) enabling single-supply operation.

Technical Context

The UPD78F1142AGK(S)-GAJ-AX implements the 78K0R CPU core with 16-bit ALU, 32 × 16-bit general-purpose registers, and Harvard architecture separating program and data memory spaces. It supports three operating modes - high-speed, middle-speed, and low-power - controlled via clock divider and stop mode entry.

Peripheral integration includes a 16-bit multifunction timer (TM00–TM03) with capture/compare/PWM output, a watchdog timer with independent clock source, and an on-chip power-on reset (POR) circuit with adjustable delay. The device uses SuperFlash® technology licensed from Silicon Storage Technology for reliable Flash endurance (>100k write/erase cycles).

Key Specifications

Pinout & Package

UPD78F1142AGK(S)-GAJ-AX is housed in a 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per Renesas User's Manual U17854EJ9V0UD, Section 1.5 (Top View) and Section 2.1 (Pin Function List).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100LEAFB#30 and MB95560PMT-G-SAMPLE, the UPD78F1142AGK(S)-GAJ-AX offers proven industrial reliability in a mature 16-bit platform with integrated voltage regulation and Flash robustness optimized for cost-sensitive embedded control - making it ideal where legacy code reuse and minimal BOM count are critical.

Availability

UPD78F1142AGK(S)-GAJ-AX is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance control systems, and programmable logic controller (PLC) I/O modules requiring stable component supply and long-term lifecycle assurance.

Supply support for UPD78F1142AGK(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 formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions for industrial and automotive markets.

The UPD78F1142AGK(S)-GAJ-AX belongs to the 78K0R/KE3 product line, designed specifically for cost-optimized, high-reliability embedded control in industrial equipment, home appliances, and building automation systems.

FAQ

What is the maximum clock frequency supported by the UPD78F1142AGK(S)-GAJ-AX?

The UPD78F1142AGK(S)-GAJ-AX supports a maximum operating frequency of 20 MHz when powered at 4.5–5.5 V, and 10 MHz at 2.7–4.4 V. This is enforced by internal clock dividers and verified across the full industrial temperature range (−40°C to +85°C). The UPD78F1142AGK(S)-GAJ-AX does not support overclocking beyond these limits, and exceeding them may cause timing violations or data corruption in Flash or peripheral registers.

Does the UPD78F1142AGK(S)-GAJ-AX include an internal voltage regulator?

Yes, the UPD78F1142AGK(S)-GAJ-AX integrates an internal voltage regulator controlled via the REGC pin. When a 1.0 µF capacitor is connected between REGC and EVSS, the regulator outputs a stable ~3.3 V supply for the core logic. This allows single-rail 5 V system design without external LDOs - a key feature distinguishing the UPD78F1142AGK(S)-GAJ-AX from many competing 16-bit MCUs that require dual supply rails.

How many ADC channels does the UPD78F1142AGK(S)-GAJ-AX support, and what is their resolution?

The UPD78F1142AGK(S)-GAJ-AX features a 10-bit successive approximation ADC with 8 input channels (AN0–AN7), each selectable via software-controlled multiplexer. The ADC includes a sample-and-hold circuit and supports both internal (3.3 V) and external reference inputs. Its effective resolution remains 10 bits across the full −40°C to +85°C range, with INL ≤ ±1 LSB and DNL ≤ ±0.5 LSB per Renesas Electrical Specifications.

Is the UPD78F1142AGK(S)-GAJ-AX pin-compatible with other members of the 78K0R/KE3 family?

The UPD78F1142AGK(S)-GAJ-AX shares the same 64-pin LQFP package and pinout with other 78K0R/KE3 devices in the μPD78F114xA(A) series (e.g., UPD78F1143AGK(S)-GAJ-AX, UPD78F1144AGK(S)-GAJ-AX), differing only in Flash size and peripheral enablement. However, it is not pin-compatible with earlier μPD78F114x (non-A) variants due to functional pin reassignments in ports P12 and P14. Always verify pin function mapping against U17854EJ9V0UD Section 2.1 before substitution.

What development tools are officially supported for the UPD78F1142AGK(S)-GAJ-AX?

Renesas officially supports the UPD78F1142AGK(S)-GAJ-AX with the RA78K0R Assembler Package (Ver. 1.20), CC78K0R C Compiler (Ver. 2.00), QB-MINI2 On-Chip Debug Emulator, and PG-FP5 Flash Programmer. These tools are documented in User's Manuals U18547E, U18549E, U18371E, and U18865E respectively. The UPD78F1142AGK(S)-GAJ-AX is not supported by newer e² studio or CS+ environments without legacy plugin installation.