Renesas UPD78F1142AGB(S)-GAH-AX

Overview

UPD78F1142AGB(S)-GAH-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 UPD78F1142AGB(S)-GAH-AX datasheet, UPD78F1142AGB(S)-GAH-AX pinout, UPD78F1142AGB(S)-GAH-AX application, or UPD78F1142AGB(S)-GAH-AX equivalent, key selection criteria include Flash endurance (100k write/erase cycles), operating temperature range (−40°C to +85°C), and support for low-power stop modes with wake-up via external interrupt or RTC.

Technical Context

The UPD78F1142AGB(S)-GAH-AX implements the 78K0R CPU core with 16-bit ALU, 32 general-purpose registers, and Harvard architecture separating program and data memory spaces. It supports three power-saving modes-HALT, STOP, and SNOOZE-with sub-μA current draw in STOP mode and fast wake-up (< 4 μs) from external pins or internal peripherals.

On-chip peripherals include a 10-bit successive-approximation ADC with sample-and-hold, programmable gain amplifier input option, and conversion time as low as 1.2 μs per channel. The device integrates dual UARTs with automatic baud-rate detection and I²C-compatible serial interface supporting both master and slave operation up to 400 kbps.

Key Specifications

Pinout & Package

UPD78F1142AGB(S)-GAH-AX is housed in a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignment follows the 78K0R/KE3 standard layout optimized for noise immunity and mixed-signal routing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F1142AGB(S)-GAH-AX, R5F100LEAFB#30 reduces BOM count via integrated LDO but sacrifices analog domain isolation, while MB95560PMC-G-SNE1 trades CRC security for larger RAM and faster ADC - making UPD78F1142AGB(S)-GAH-AX optimal for safety-critical industrial nodes requiring verified firmware integrity and stable analog performance.

Availability

UPD78F1142AGB(S)-GAH-AX is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance control systems, and motor drive feedback units requiring stable component supply across multi-year production cycles.

Supply support for UPD78F1142AGB(S)-GAH-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 78K0R/KE3 product line delivers cost-optimized 16-bit MCUs targeting resource-constrained industrial control applications requiring robust analog integration, low-power operation, and long-term supply stability.

FAQ

What is the maximum operating frequency of the UPD78F1142AGB(S)-GAH-AX?

The UPD78F1142AGB(S)-GAH-AX supports a maximum system clock frequency of 20 MHz using its on-chip oscillator or external crystal. When configured with the internal PLL, it maintains full functionality at this rate, enabling deterministic real-time response for motor control and sensor acquisition loops. The UPD78F1142AGB(S)-GAH-AX datasheet specifies timing parameters validated up to 20 MHz across the full −40°C to +85°C temperature range.

Does the UPD78F1142AGB(S)-GAH-AX include an on-chip voltage regulator?

Yes, the UPD78F1142AGB(S)-GAH-AX integrates an on-chip voltage regulator controlled via the REGC pin. Pulling REGC high enables the regulator to supply core logic from the main VDD rail, reducing external component count. The UPD78F1142AGB(S)-GAH-AX requires proper bypassing of the regulator output (EVDD/EVSS) and adherence to startup timing requirements specified in Section 2.2.15 of its user's manual.

How many ADC channels does the UPD78F1142AGB(S)-GAH-AX support, and what is their resolution?

The UPD78F1142AGB(S)-GAH-AX features an integrated 10-bit successive-approximation ADC with 8 input channels. Each channel supports programmable sampling time and conversion trigger sources including timers and external events. The UPD78F1142AGB(S)-GAH-AX achieves ±1 LSB integral nonlinearity and 1.2 μs conversion time under typical conditions, as confirmed in the electrical characteristics table of its datasheet.

Is the UPD78F1142AGB(S)-GAH-AX pin-compatible with other members of the 78K0R/KE3 family?

No, the UPD78F1142AGB(S)-GAH-AX is not fully pin-compatible with all 78K0R/KE3 variants. While it shares the same 64-pin LQFP package footprint with UPD78F1143AGB(S)-GAH-AX and UPD78F1144AGB(S)-GAH-AX, differences in peripheral mapping - such as UART channel assignment and ADC input routing - require PCB layout verification. The UPD78F1142AGB(S)-GAH-AX pin function list (Section 2.1 of U17854EJ9V0UD) must be cross-checked before substitution.

What debug interface does the UPD78F1142AGB(S)-GAH-AX support?

The UPD78F1142AGB(S)-GAH-AX supports IEEE 1149.1-compliant JTAG for on-chip debugging, including real-time trace, non-intrusive breakpoints, and register visibility. It is compatible with Renesas' E2 emulator and QB-MINI2 debug hardware. The UPD78F1142AGB(S)-GAH-AX requires dedicated TCK/TMS/TDI/TDO pins and does not support SWD or single-wire debug alternatives.