ISO7641FCDWR datasheet(2/31 Pages) TI

2 / 31 page

ISO7631FM, ISO7631FC

ISO7640FC, ISO7641FC

SLLSEC3A – SEPTEMBER 2012 – REVISED SEPTEMBER 2012

www.ti.com

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

DESCRIPTION CONTINUED

Each isolation channel has a logic input and output buffer separated by a silicon dioxide (SiO2) insulation barrier.

Used in conjunction with isolated power supplies, these devices prevent noise currents on a data bus or other

circuits from entering the local ground and interfering with or damaging sensitive circuitry. The devices have TTL

input thresholds and can operate from 2.7 V (M-Grade), 3.3 V and 5 V supplies. All inputs are 5 V tolerant when

supplied from 3.3 V or 2.7 V supplies.

PIN DESCRIPTIONS

I/O

DESCRIPTION

NAME

ISO7640

ISO7641

ISO7631

INA

Input, channel A

INB

Input, channel B

INC

Input, channel C

IND

Input, channel D

OUTA

Output, channel A

OUTB

Output, channel B

OUTC

Output, channel C

OUTD

Output, channel D

Enables (when input is High or Open) or Disables (when input is Low) OUTA, OUTB,

OUTC and OUTD of ISO7640

Enables (when input is High or Open) or Disables (when input is Low) OUTD of

EN1

ISO7641 and OUTC of ISO7631

Enables (when input is High or Open) or Disables (when input is Low) OUTA, OUTB,

and OUTC of ISO7641

EN2

Enables (when input is High or Open) or Disables (when input is Low) OUTA and

OUTB of ISO7631

VCC1

–

Power supply, VCC1

VCC2

–

Power supply, VCC2

GND1

2,8

–

Ground connection for VCC1

GND2

9,15

–

Ground connection for VCC2

6,11

No Connect pins are floating with no internal connection

Table 1. FUNCTION TABLE(1)

INPUT

OUTPUT

INPUT

OUTPUT ENABLE

OUTPUT

VCC

(INx)

(ENx)

(OUTx)

H or Open

Open

H or Open

Undetermined

(1)

PU = Powered Up(VCC ≥ 2.7 V); PD = Powered Down (VCC ≤ 2.1 V); X = Irrelevant; H = High Level; L

= Low Level; Z = High Impedance

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