Renesas UPD78F9177AYGB-8ES-A

Overview

UPD78F9177AYGB-8ES-A from Renesas Electronics is an 8-bit Flash-based microcontroller in the 78K/0S family, featuring 128 KB on-chip Flash memory, 8 KB RAM, a 10-bit A/D converter with 16 input channels, and integrated serial interfaces including UART, CSI, and I²C-compatible SMBus. It operates at up to 20 MHz and targets embedded control in industrial sensors and motor drive subsystems.

For engineers reviewing the UPD78F9177AYGB-8ES-A datasheet, UPD78F9177AYGB-8ES-A pinout, UPD78F9177AYGB-8ES-A application, or UPD78F9177AYGB-8ES-A equivalent, key selection considerations include its 48-pin TQFP package, -40°C to +85°C industrial temperature grade, Flash reprogrammability, and peripheral set optimized for real-time sensor data acquisition and actuator control.

Technical Context

This MCU implements the 78K/0S CPU core with 16-bit addressing, supporting both mask ROM and Flash variants across the µPD789177/78F9177 family. Its clock system includes on-chip oscillator, external crystal support (1–20 MHz), and PLL for internal high-speed operation.

The device integrates dual 16-bit timers (Timer90, Timer80–82), watchdog timer, standby modes (HALT, STOP), and reset circuitry with voltage detector. Peripheral configuration is fixed per variant: UPD78F9177AYGB-8ES-A belongs to the µPD789177Y subseries, confirming 48-pin TQFP packaging and 10-bit A/D capability.

Key Specifications

Pinout & Package

UPD78F9177AYGB-8ES-A uses a 48-pin plastic TQFP (Thin Quad Flat Package) with 0.5 mm pitch, measuring 7.0 × 7.0 mm. The package supports fine-pitch PCB assembly and thermal performance suitable for convection-cooled industrial modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with UPD78F9177AYGB-8ES-A, R5F100LEAFB#30 offers lower integration and reduced peripheral count but improves power efficiency in ultra-low-duty-cycle sensing, while UPD78F9177AYGB-GAH-AX provides identical functionality in alternate packaging-making it suitable for automated SMT lines requiring specific reel specifications.

Availability

UPD78F9177AYGB-8ES-A is available at Aetrix Electronics and suitable for industrial sensor nodes, motor drive subsystems, smart HVAC actuators, and PLC I/O modules requiring stable component supply across multi-year production cycles.

Supply support for UPD78F9177AYGB-8ES-A 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, power, and SoC solutions.

The 78K/0S family-including UPD78F9177AYGB-8ES-A-is designed for cost-effective, real-time embedded control in industrial automation, appliance, and sensor-edge applications where Flash programmability and peripheral integration are critical.

FAQ

What is the maximum operating frequency of the UPD78F9177AYGB-8ES-A?

The UPD78F9177AYGB-8ES-A supports a maximum CPU clock frequency of 20 MHz when driven by an external crystal or oscillator. This frequency is achievable across the full industrial temperature range (-40°C to +85°C) and enables approximately 10 million instructions per second (MIPS) throughput for deterministic real-time control tasks. The internal clock generator includes a PLL option to multiply lower-frequency crystals to reach this speed.

Does the UPD78F9177AYGB-8ES-A include an on-chip debug interface?

Yes, the UPD78F9177AYGB-8ES-A supports on-chip debugging via the single-wire debug (SWD) interface compliant with the 78K/0S standard. This allows full breakpoint, step-through, and register inspection capabilities using Renesas' ID78K0S-NS debugger or compatible third-party tools. No external debug pod is required, and the interface shares pins with Port 0, minimizing footprint impact.

What A/D input channels are available on the UPD78F9177AYGB-8ES-A?

The UPD78F9177AYGB-8ES-A provides 16 analog input channels for its 10-bit successive-approximation A/D converter. Channels AD0–AD7 are mapped to Port 3 (P30–P37), and AD8–AD15 are mapped to Port 4 (P40–P47). All channels support software or timer-triggered conversion, and the A/D module includes built-in sample-and-hold for accurate multi-channel acquisition.

Is the UPD78F9177AYGB-8ES-A RoHS compliant and lead-free?

Yes, the UPD78F9177AYGB-8ES-A is RoHS compliant and manufactured with lead-free terminations per EU Directive 2011/65/EU. The "GB" suffix in the part number explicitly denotes green (halogen-free, lead-free) packaging. Renesas confirms compliance through material declarations and third-party testing; full documentation is available via the Renesas Quality Portal upon registration.

Can the UPD78F9177AYGB-8ES-A operate from a 3.3 V supply?

No, the UPD78F9177AYGB-8ES-A is specified for 5.0 V ±10% operation only. Its I/O structure, internal regulators, and Flash programming voltage requirements are designed for 4.5–5.5 V supply rails. Attempting to operate below 4.5 V may cause A/D inaccuracies, Flash write failures, or unpredictable reset behavior. For 3.3 V systems, consider Renesas' RL78/G13 or RA2A1 families instead.