DIO74134

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DIO74134• Rev. 1.0

Detailed Description

Overview

The DIO74134 is a unidirectional, single-bit, dual-supply, noninverting Voltage-level translator. Refer to the pin A

of VCCA to receive the signal that will be translated. Refer to the pin B of VCCB to receive the signal that will be

translated. Both supply pins VCCA and VCCB support a Voltage range from 1.08V to 3.6V.

Fully Configurable Dual-Rail Design

Both VCCA and VCCB can be power at any Voltage from 1.08V to 3.6V, making the device suitable for switching

between any of the Voltage nodes (1.08V, 1.2V, 1.8V, 2.5V, and 3.3V).

Partial-Power-Down Mode Operation

The Ioff circuit disables the output, preventing destructive current flow back when the device is powered off. This

may happen in applications where the system is partially powered down to reduce power consumption.

VCC Isolation

The VCC isolation feature ensures that if either VCCA or VCCB are at GND (or < 0.4V), both ports A and B are set to

a high-impedance state, thereby preventing the wrong logic level from appearing on any bus.

Device Functional Modes

Table 2 lists the functional modes of the DIO74134.

Table 2. Function Table

INPUT

OUTPUT

A PORT

B PORT

L

L

H

H

Power Supply Recommendations

Connect ground before applying either VCCA or VCCB. There is no specific power sequence requirement for the

DIO74134. VCCA or VCCB may be powered up first, and VCCA or VCCB may be powered down first.