Renesas UPD78F9211MA(A)-FAA-E1-AX

Overview

UPD78F9211MA(A)-FAA-E1-AX from Renesas Electronics is an 8-bit single-chip microcontroller based on the 78K0S CPU core, featuring 2 KB flash memory, 128-byte high-speed RAM, and a 10-bit A/D converter with four input channels. It operates from 2.2 V to 5.5 V over −40°C to +85°C and integrates a 16-bit timer/event counter, 8-bit PWM-capable timer H1, watchdog timer, on-chip power-on clear (2.1 V typ.), and low-voltage detection (2.35–4.3 V selectable). It is used in industrial sensor interfaces and embedded control modules requiring analog monitoring and deterministic timing.

For engineers reviewing the UPD78F9211MA(A)-FAA-E1-AX datasheet, UPD78F9211MA(A)-FAA-E1-AX pinout, UPD78F9211MA(A)-FAA-E1-AX application, or UPD78F9211MA(A)-FAA-E1-AX equivalent, key selection criteria include its A/D converter resolution and channel count, flash memory size, operating voltage range, temperature grade (A-level), and SSOP-16 package compatibility with legacy 78K0S designs.

Technical Context

The UPD78F9211MA(A)-FAA-E1-AX implements the 78K0S/KY1+ architecture with a Harvard-style memory map spanning 64 KB, supporting direct and indirect addressing modes. Its clock system combines an 8 MHz ±5% internal high-speed oscillator (−40°C to +85°C), a 240 kHz internal low-speed oscillator for WDT and standby timing, and external crystal or clock inputs up to 10 MHz.

Peripheral integration includes a 16-bit timer/event counter with capture/compare/PWM output capability, an 8-bit timer H1 supporting PWM generation, and a dedicated watchdog timer driven independently by the low-speed oscillator-ensuring fail-safe operation even if the main clock fails. The A/D converter supports software-triggered conversions with 10-bit resolution across four analog inputs mapped to Port 2 pins.

Key Specifications

Pinout & Package

UPD78F9211MA(A)-FAA-E1-AX is housed in a 16-pin plastic SSOP (Shrink Small Outline Package) with 0.65 mm lead pitch, JEDEC MS-012AC compliant, and RoHS-compliant Ni/Pd/Au plating (AX suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F9211MA(A)-FAA-E1-AX, the UPD78F9212MA(A)-FAA-AX offers double flash capacity without peripheral changes, while the UPD78F9211GR(A)-JJG-A retains identical functionality in a through-hole package-enabling design flexibility across SMT and THT manufacturing paths.

Availability

UPD78F9211MA(A)-FAA-E1-AX is available at Aetrix Electronics and suitable for industrial sensor interfaces, motor control modules, and smart appliance controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for UPD78F9211MA(A)-FAA-E1-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.

The UPD78F9211MA(A)-FAA-E1-AX belongs to the 78K0S/KY1+ family, designed for cost-sensitive, resource-constrained industrial and consumer embedded systems requiring integrated analog sensing and deterministic real-time control.

FAQ

What is the maximum operating frequency supported by the UPD78F9211MA(A)-FAA-E1-AX?

The UPD78F9211MA(A)-FAA-E1-AX supports a maximum external crystal or clock input frequency of 10 MHz at VDD = 2.0–5.5 V. Its internal high-speed oscillator operates at 8 MHz ±5% over the full −40°C to +85°C range. At 10 MHz, the minimum instruction execution time is 0.2 µs, enabling responsive real-time control loops in applications like motor commutation or sensor sampling.

Does the UPD78F9211MA(A)-FAA-E1-AX support in-system programming of its flash memory?

Yes, the UPD78F9211MA(A)-FAA-E1-AX supports in-system programming via its on-chip debug interface and dedicated flash command set. Programming can be performed using Renesas' PG-FP5 programmer or QB-MINI2 emulator. The 2 KB flash includes software read-out protection to prevent unauthorized firmware access, making it suitable for secure embedded deployments where IP protection is required.

How many analog input channels does the UPD78F9211MA(A)-FAA-E1-AX provide, and what is their resolution?

The UPD78F9211MA(A)-FAA-E1-AX provides four analog input channels (ANI0–ANI3) with 10-bit resolution. These channels are multiplexed onto Port 2 pins (P20–P23) and share the same VDD/VSS reference-ensuring consistent scaling across all channels. Conversion results are stored in dedicated 10-bit registers and support software-triggered acquisition for precise timing control in sensor applications.

What package type and lead finish does the UPD78F9211MA(A)-FAA-E1-AX use?

The UPD78F9211MA(A)-FAA-E1-AX uses a 16-pin plastic SSOP (Shrink Small Outline Package) with 0.65 mm lead pitch. Its lead finish is Ni/Pd/Au (AX suffix), confirming full RoHS compliance and suitability for lead-free reflow soldering processes. This package is pin-compatible with other 78K0S/KY1+ variants in the MA-FAA series, enabling drop-in replacement in existing SSOP-16 layouts.

Is the UPD78F9211MA(A)-FAA-E1-AX qualified for automotive applications?

No, the UPD78F9211MA(A)-FAA-E1-AX is rated for A-level industrial use (−40°C to +85°C) and is not qualified to AEC-Q100 automotive standards. It falls under Renesas' "special" quality level-intended for transportation equipment like industrial machinery and non-safety-critical building systems-but excludes automotive powertrain or ADAS applications. For automotive use, Renesas recommends the RL78/G13 or RH850 families.