7.4 Device Functional Modes

Table 7-2 lists the functional modes of ISO7710 device.

Table 7-2. Function Table

VCC1 (1)

VCC2

INPUT

(IN)(3)

OUTPUT

(OUT)

COMMENTS

PU

PU

H

H

Normal Operation:

A channel output assumes the logic state of the input.

L

L

Open

Default

Default mode: When IN is open, the corresponding channel output goes to the

default logic state. Default is High for ISO7710 and Low for ISO7710F.

PD

PU

X

Default

Default mode: When VCC1 is unpowered, a channel output assumes the logic

state based on the selected default option. Default is High for ISO7710 and

Low for ISO7710F.

When VCC1 transitions from unpowered to powered-up, a channel output

assumes the logic state of the input.

When VCC1 transitions from powered-up to unpowered, channel output

assumes the selected default state.

X

PD

X

Undetermined

When VCC2 is unpowered, a channel output is undetermined (2).

When VCC2 transitions from unpowered to powered-up, a channel output

assumes the logic state of the input

(1)

PU = Powered up (VCC ≥ 2.25 V); PD = Powered down (VCC ≤ 1.7 V); X = Irrelevant; H = High level; L = Low level

(2)

The outputs are in undetermined state when 1.7 V < VCC1, VCC2 < 2.25 V.

(3)

A strongly driven input signal can weakly power the floating VCC via an internal protection diode and cause undetermined output.

7.4.1 Device I/O Schematics

Output

985

1.5 M

INx

VCCI

VCCI

VCCI

Input (Devices without F suffix)

985

1.5 M

INx

VCCI

VCCI

VCCI

VCCI

Input (Devices with F suffix)

VCCO

~20

OUTx

Copyright © 2016, Texas Instruments Incorporated

Figure 7-3. Device I/O Schematics

ISO7710

SLLSER9E – NOVEMBER 2016 – REVISED DECEMBER 2024

www.ti.com

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