ISO6741 datasheet(21/35 Pages) TI

21 / 35 page

8.4 Device Functional Modes

Table 8-2 lists the functional modes for the ISO674x devices.

Table 8-2. Function Table

VCCI (1)

VCCO

INPUT

(INx) (3)

OUTPUT

ENABLE

(ENx)

OUTPUT

(OUTx)

COMMENTS

H or open

Normal Operation: A channel output assumes the logic state of its

input.

H or open

Open

H or open

Default

Default mode: When INx is open, the corresponding channel output

goes to its default logic state. Default is High for ISO674x and Low for

ISO674x with F suffix.

A low value of output enable causes the outputs to be high-

impedance.

H or open

Default

Default mode: When VCCI is unpowered, a channel output assumes

the logic state based on the selected default option. Default is High

for ISO674x and Low for ISO674x with F suffix. When VCCI transitions

from unpowered to powered-up, a channel output assumes the logic

state of the input. When VCCI transitions from powered-up to

unpowered, channel output assumes the selected default state.

Undetermined

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

VCCO transitions from unpowered to powered-up, a channel output

assumes the logic state of the input.

(1)

VCCI = Input-side VCC; VCCO = Output-side VCC; PU = Powered up (VCC ≥ 1.71 V); PD = Powered down (VCC ≤ 1.05 V); X = Irrelevant;

H = High level; L = Low level ; Z = High Impedance

(2)

The outputs are in undetermined state when 1.7 V < VCCI, VCCO < 2.25 V and 1.05 V < VCCI, VCCO < 1.71 V

(3)

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

8.4.1 Device I/O Schematics

Input (Devices without F suffix)

Input (Devices with F suffix)

Input (Devices without F suffix)

985

INx

VCCI

Input (Devices with F suffix)

985

INx

VCCI

Output

VCCO

~20

OUTx

VCCI

1.5 M

Enable

INx

VCCI

550 k

985

20 k

Figure 8-3. Device I/O Schematics

www.ti.com

ISO6741

SLLSFJ6 – AUGUST 2020

Submit Document Feedback

Product Folder Links: ISO6741

ISO6741 датащи(PDF) 21 Page - Texas Instruments

ISO6741 датащи(HTML) 21 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35

датащи скачать

ссылки URL