Renesas UPD78F0745MC-CAB-AX

Overview

UPD78F0745MC-CAB-AX from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/IB2 family, featuring 64 KB Flash memory, 4 KB RAM, and a 20 MHz max CPU clock. It integrates 16-bit timers (X0/X1), 8-bit timer H1, watchdog timer, ADC (10-bit, 8-channel), UART, I²C, and on-chip voltage regulator (REGC). It targets industrial control panels requiring deterministic real-time response and low-power operation.

For engineers reviewing the UPD78F0745MC-CAB-AX datasheet, UPD78F0745MC-CAB-AX pinout, UPD78F0745MC-CAB-AX application, or UPD78F0745MC-CAB-AX equivalent, key selection criteria include its 30-pin LQFP package, internal high-speed oscillator (8 MHz), 10-bit ADC with sample-and-hold, REGC-based V_DD regulation, and support for 78K0 instruction set compatibility with RA78K0 toolchain.

Technical Context

The UPD78F0745MC-CAB-AX implements the 78K0 CPU core with 16-bit addressing, 48-pin maximum I/O capability (configured across ports P0–P7, P12), and dual-clock domain operation-supporting independent main system clock (X1 or internal oscillator) and peripheral clock (divided from main clock). Its REGC terminal enables internal 3.3 V regulation from 4.0–5.5 V supply, eliminating external LDO in many designs.

It supports three low-power modes (HALT, STOP, IDLE), features a 16-bit timer/event counter (TM00) with square-wave and PPG output modes (30-pin variant only), and includes hardware I²C master/slave with arbitration and clock stretching-verified in the 78K0/Ix2 User's Manual Rev.5.00 (Feb 2012), Section 1.3.3 and Chapter 9.

Key Specifications

Pinout & Package

UPD78F0745MC-CAB-AX is housed in a 30-pin LQFP package (7 × 7 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per Section 2.1.3 ("78K0/IB2 (30 pins)") of the 78K0/Ix2 User's Manual Rev.5.00.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100BGSP#V0 and UPD78F0735GC-8EU-A, the UPD78F0745MC-CAB-AX offers the largest Flash (64 KB) and full REGC integration in a 30-pin footprint-making it optimal for cost-sensitive industrial controllers needing field-upgradable firmware and self-regulated power.

Availability

UPD78F0745MC-CAB-AX is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, and home appliance control boards requiring stable component supply and long-term lifecycle support.

Supply support for UPD78F0745MC-CAB-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 headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The UPD78F0745MC-CAB-AX belongs to the 78K0/Ix2 product line, designed specifically for cost-optimized, real-time embedded control in resource-constrained industrial and consumer equipment.

FAQ

What is the maximum operating frequency of the UPD78F0745MC-CAB-AX?

The UPD78F0745MC-CAB-AX supports a maximum CPU clock frequency of 20 MHz. This is achieved using either the external crystal oscillator (X1/X2, up to 20 MHz) or the internal high-speed oscillator (8 MHz, factory-trimmed). System clock division and PLL configuration allow flexible peripheral clock derivation while maintaining CPU timing integrity per Section 5.4 and 5.5 of the 78K0/Ix2 User's Manual Rev.5.00.

Does the UPD78F0745MC-CAB-AX include an integrated voltage regulator?

Yes, the UPD78F0745MC-CAB-AX includes an on-chip voltage regulator controlled by the REGC pin. When configured with a 1.0 µF ceramic capacitor on REGC, it delivers a stable 3.3 V ±3% output from a 4.0–5.5 V VDD supply. This eliminates the need for an external LDO in many 5 V system designs, as confirmed in Section 2.2.9 and Figure 2.12 of the 78K0/Ix2 User's Manual Rev.5.00.

How many ADC channels does the UPD78F0745MC-CAB-AX support, and what is its resolution?

The UPD78F0745MC-CAB-AX integrates a 10-bit successive approximation ADC with 8 input channels. Channels AN0–AN3 map to P30–P33, while AN4–AN7 map to P20–P23. The ADC includes a built-in sample-and-hold circuit and supports software/start-triggered conversion, as specified in Section 7.1 and Table 7.1 of the 78K0/Ix2 User's Manual Rev.5.00.

Is the UPD78F0745MC-CAB-AX pin-compatible with other 78K0/IB2 variants?

The UPD78F0745MC-CAB-AX uses the 30-pin LQFP package defined for the 78K0/IB2 (30 pins) variant group. It shares identical pinout and electrical characteristics with UPD78F0746MC-CAB-AX and UPD78F0755GC-8EU-A per Section 2.1.3 of the 78K0/Ix2 User's Manual Rev.5.00. However, Flash/RAM sizes and peripheral enablement differ-requiring firmware validation before substitution.

What development tools are supported for the UPD78F0745MC-CAB-AX?

The UPD78F0745MC-CAB-AX is supported by Renesas' RA78K0 assembler (Ver.4.01), CC78K0 C compiler (Ver.4.00), QB-MINI2 on-chip debugger, and PG-FP5 Flash programmer. These tools are documented in related manuals including U18371E (QB-MINI2), R20UT0008E (PG-FP5), and U17199E (RA78K0), all referenced in the 78K0/Ix2 User's Manual Rev.5.00 Appendix "Related Documents".