DIO74506

Version 1.0, May 2026

www.dioo.com

© 2026 Dioo Microcircuits Co., Ltd. Jiangsu

3

2. Absolute Maximum Ratings

Exceeding the maximum ratings listed under Absolute Maximum Ratings when designing is likely to

damage the device permanently. Do not design to the maximum limits because long-time exposure to them

might impact the device’s reliability. The ratings are obtained over an operating free-air temperature range

unless otherwise specified.

Symbol

Parameter

Condition

Rating

Unit

VCCA

Supply voltage A

4 ms transient; on pin VCCA

-0.5 to 2.5

V

VCCB

Supply voltage B

4 ms transient; on pin VCCB

-0.5 to 4.6

V

VI

Port A input voltage

4 ms transient at I/O pins

-0.5 to 2.5

V

Port B input voltage

4 ms transient at l/O pins

-0.5 to 4.6

V

IIK

Input clamp current

VI < -0.3 V or VI > VCCA + 0.3 V (1)

±20

mA

IOK

Port A, output clamping current

VO < -0.3 V or VO > VCCA + 0.3 V (1)

±20

mA

Port B, output clamping current

VO < -0.3 V or VO > VCCB + 0.3 V (1)

±50

mA

PD

Total power dissipation

TA = -40°C to 85°C

250

mW

TSTG

Storage temperature range

-55 to 150

°C

Note：

(1) The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

3. Recommended Operating Conditions

Recommended operating conditions are specified to ensure optimal performance to the datasheet

specifications. The ratings are obtained over an operating free-air temperature range unless otherwise

specified.

Symbol

Parameter

Condition

Rating

Unit

VCCA

Supply voltage A

On pin VCCA (1)

1.1 to 1.95

V

VCCB

Supply voltage B

On pin VCCB (1)

1.7 to 3.6

V

VI

Port A input voltage

Host side (2)

−0.3 to (VCCA + 0.3)

V

Port B input voltage

Memory card side (3)

−0.3 to (VCCB + 0.3)

V

TA

Ambient temperature

−40 to 85

°C

Note：

(1) VCCA should be less than or equal to VCCB.

(2) VCCA must not exceed 1.95 V.

(3) VCCB must not exceed 3.6 V.