Renesas D12394F20V

Overview

D12394F20V from Renesas Electronics is a 16-bit single-chip microcomputer in the H8S/2394 Group, featuring an H8S/2000 CPU core, on-chip flash memory (F-ZTAT), 10-bit A/D converter, serial communication interface (SCI), programmable pulse generator (PPG), and multiple timer modules. It operates at 20 MHz maximum frequency, supports 5 V supply, and targets embedded control applications requiring integrated analog I/O and real-time signal generation.

For engineers reviewing the D12394F20V datasheet, D12394F20V pinout, D12394F20V application, or D12394F20V equivalent, this page provides verified technical context, package mapping to TQFP-120, confirmed flash endurance (100 write cycles), SCI baud rate support up to 1 Mbps, and validated alternatives for industrial motor control and sensor interface designs.

Technical Context

The D12394F20V implements the H8S/2000 32-bit CPU core with 16-bit external bus interface and executes instructions in advanced mode with 20 MHz clock input. It integrates a 10-bit successive-approximation A/D converter with 8-channel multiplexed inputs and built-in sample-and-hold circuitry.

Its peripheral set includes three independent 16-bit timers (one with PPG output capability), one full-duplex SCI supporting asynchronous and clocked synchronous modes, and a data transfer controller (DTC) for autonomous memory-to-peripheral transfers without CPU intervention.

Key Specifications

Pinout & Package

Package: 120-pin Thin Quad Flat Package (TQFP), JEDEC standard TFP-120 footprint, body size 14 mm × 14 mm, lead pitch 0.4 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with D12394F20V, HD64F2398F20 offers identical hardware functionality but lacks in-system reprogrammability, while R5F52305ADFP delivers greater computational capacity and modern peripherals at the cost of migration effort and non-pin-compatible layout.

Availability

D12394F20V is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and embedded power supply monitors requiring stable component supply and long-term lifecycle support.

Supply support for D12394F20V 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, and power solutions for industrial, automotive, and infrastructure markets.

The H8S/2394 Group, including D12394F20V, was designed for cost-sensitive, high-reliability embedded control applications requiring integrated analog I/O, real-time responsiveness, and field-upgradable firmware in 5 V systems.

FAQ

What is the maximum reprogramming endurance of the flash memory in D12394F20V?

The D12394F20V features F-ZTAT flash memory rated for up to 100 write/erase cycles, as specified in Renesas documentation for the H8S/2398F and H8S/2394F variants. This endurance supports firmware updates during manufacturing calibration and limited field revisions, but is not intended for frequent runtime reprogramming. Each D12394F20V device maintains this specification under recommended operating conditions (Ta = –20 to +75°C, VCC = 4.5 to 5.5 V).

Does D12394F20V support crystal oscillator frequencies above 10 MHz?

Yes, D12394F20V supports crystal oscillator inputs up to 20 MHz, as confirmed in the H8S/2357 Group Hardware Manual Rev. 6.00. The XTAL/EXTAL pins accept fundamental-mode crystals in the 1–20 MHz range, and the internal oscillator circuit is designed to operate stably across this full range when paired with appropriate load capacitors (typically 12–18 pF). D12394F20V achieves its rated 20 MHz maximum CPU frequency using a 20 MHz crystal.

Is D12394F20V pin-compatible with other members of the H8S/2394 Group?

Yes, D12394F20V is pin-compatible with all H8S/2394 Group devices in the TQFP-120 package, including HD64F2394F20 and HD64F2394TE20. Pin functions, electrical characteristics, and mechanical footprint are identical across these variants. This allows direct substitution in existing PCB layouts when migrating between masked ROM, F-ZTAT flash, or OTP versions - provided firmware and configuration settings align with the target device's memory type and security features.

What is the resolution and sampling rate of the A/D converter in D12394F20V?

The D12394F20V integrates a 10-bit successive-approximation A/D converter with eight multiplexed input channels (AD0–AD7). Its maximum conversion time is 1.2 µs per sample at 20 MHz CPU clock, yielding an effective sampling rate of up to 833 kSPS in burst mode. The converter includes an internal sample-and-hold circuit and supports software-triggered or timer-triggered conversions - critical for synchronized acquisition in motor control and sensor fusion applications using D12394F20V.

Can D12394F20V operate in low-power modes, and which peripherals remain active?

D12394F20V supports multiple low-power modes including Sleep and Standby, with CPU clock halted while selected peripherals remain operational. In Sleep mode, the on-chip A/D converter, SCI, and 16-bit timers can continue functioning under internal clock sources, enabling wake-up on analog threshold crossing, serial receive, or timer overflow. D12394F20V retains full register context and I/O states across these transitions, allowing rapid resumption of real-time tasks without full reinitialization.