RA4E1 datasheet(17/81 Pages) RENESAS

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Caution: Permanent damage to the MCU might result if absolute maximum ratings are exceeded.

Table 2.2

Recommended operating conditions

Parameter

Symbol

Value

Min

Typ

Max

Unit

Power supply voltages

VCC

When USB is not used

2.7

—

3.6

When USB is used

3.0

—

3.6

VSS

—

USB power supply voltages

VCC_USB

—

VCC

—

VSS_USB

—

VBATT power supply voltage

VBATT

1.65*2

—

3.6

Analog power supply voltages

AVCC0*1

—

VCC

—

AVSS0

—

Note 1. Connect AVCC0 to VCC. When the A/D converter and the D/A converter are not in use, do not leave the AVCC0, VREFH/VREFH0,

AVSS0, and VREFL/VREFL0 pins open. Connect the AVCC0 and VREFH/VREFH0 pins to VCC, and the AVSS0 and VREFL/

VREFL0 pins to VSS, respectively.

Note 2. Low CL crystal cannot be used below VBATT = 1.8V.

2.2

DC Characteristics

2.2.1

Tj/Ta Definition

Table 2.3

DC characteristics

Conditions: Products with operating temperature (Ta) -40 to +85°C

Parameter

Symbol

Typ

Max

Unit

Test conditions

Permissible junction

temperature

—

105

°C

High-speed mode

Low-speed mode

Subosc-speed mode

Note:

Make sure that Tj = Ta + θja × total power consumption (W), where total power consumption = (VCC - VOH) × ΣIOH + VOL × ΣIOL +

ICCmax × VCC.

2.2.2

I/O VIH, VIL

Table 2.4

I/O VIH, VIL (1 of 2)

Parameter

Symbol Min

Typ Max

Unit

Input voltage

(except for

Schmitt trigger

input pins)

Peripheral

function pin

EXTAL (external clock input), SPI (except RSPCK) VIH

VCC × 0.8 —

—

VIL

—

VCC × 0.2

IIC (SMBus)

VIH

2.1

—

VCC + 3.6

(max 5.8)

VIL

—

0.8

RA4E1 Datasheet

2. Electrical Characteristics

R01DS0391EJ0130 Rev.1.30

Jun 6, 2025

Page 17 of 81

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