R7KA8M2AFECAC datasheet(103/295 Pages) RENESAS

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2.2.6

VCC Rise and Fall Gradient and Ripple Frequency

Table 2.40

VCC rise and fall gradient characteristics at power on/off

Parameter

Symbol

Min

Typ

Max

Unit

Test

conditions

VCC rising gradient at power on*1

SrVCC

0.0084 —

ms/V

—

VCC falling gradient

at power off

VBATT function is disabled*1

SfVCC1

0.0084 —

—

ms/V

—

VBATT function is enabled.

SfVCC2

1.0000 —

—

Note 1. In case the VCC voltage crosses VPOR1

Table 2.41

VCC ripple frequency and gradient characteristics during operation

The ripple voltage must meet the allowable ripple frequency fr(VCC) within the range between the VCC upper limit (3.63 V) and lower limit

(1.62 V). When the VCC change exceeds VCC ±10%, the allowable voltage change rising and falling gradient dt/dVCC must be met.

Parameter

Symbol

Min

Typ

Max

Unit

Test conditions

Allowable ripple frequency

fr (VCC)

—

kHz

Figure 2.23

Vr(VCC) ≤ VCC × 0.2

—

MHz

Figure 2.23

Vr(VCC) ≤ VCC × 0.08

—

MHz

Figure 2.23

Vr(VCC) ≤ VCC × 0.06

Allowable voltage change

rising and falling gradient

dt/dVCC*1

1.0

—

ms/V

When VCC change exceeds

VCC ±10%

Note 1. In case the VCC voltage does not cross VPOR1.

Vr(VCC)

VCC

1 / fr(VCC)

Figure 2.23

Ripple waveform

RA8M2 Datasheet

2. Electrical Characteristics

R01DS0438EJ0130 Rev.1.30

Feb 27, 2026

Page 103 of 295

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