ISO7340C_15 datasheet(18/34 Pages) TI

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Case Temperature (GC)

100

150

200

100

200

300

400

500

D009

VCC1 = VCC2 = 3.6 V

VCC1 = VCC2 = 5.5 V

ISO7340C, ISO7340FC, ISO7341C, ISO7341FC, ISO7342C, ISO7342FC

SLLSEI6E – SEPTEMBER 2014 – REVISED APRIL 2015

www.ti.com

8.3.1.4 Safety Limiting Values

Safety limiting intends to prevent potential damage to the isolation barrier upon failure of input or output circuitry. A failure of

the I/O can allow low resistance to ground or the supply and, without current limiting, dissipate sufficient power to overheat

the die and damage the isolation barrier, potentially leading to secondary system failures.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

RθJA = 78.4 °C/W, VI = 5.5 V, TJ = 150°C, TA = 25°C

290

Safety input, output, or supply

current

RθJA = 78.4 °C/W, VI = 3.6 V, TJ = 150°C, TA = 25°C

443

Maximum case temperature

150

°C

The safety-limiting constraint is the absolute-maximum junction temperature specified in the Absolut Maximun

Ratings table. The power dissipation and junction-to-air thermal impedance of the device installed in the

application hardware determines the junction temperature. The assumed junction-to-air thermal resistance in the

Thermal Information table is that of a device installed on a High-K Test Board for Leaded Surface-Mount

Packages. The power is the recommended maximum input voltage times the current. The junction temperature is

then the ambient temperature plus the power times the junction-to-air thermal resistance.

Figure 18.

θJC Thermal Derating Curve per DIN V VDE 0884-10

8.4 Device Functional Modes

ISO734x functional modes are shown in Table 2.

Table 2. Function Table(1)

OUTPUT

INPUT

OUTPUT ENABLE

(OUTx)

VCCI

VCCO

(INx)

(ENx)

ISO734xC

ISO734xFC

H or Open

Open

H or Open

H(2)

L(3)

H or Open

H(2)

L(3)

Undetermined

(1)

VCCI = Input-side VCC; VCCO = Output-side VCC; PU = Powered up (VCC ≥ 3 V); PD = Powered down (VCC ≤ 2.1 V); X = Irrelevant; H =

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

(2)

In fail-safe condition, output defaults to high level

(3)

In fail-safe condition, output defaults to low level

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Product Folder Links: ISO7340C ISO7340FC ISO7341C ISO7341FC ISO7342C ISO7342FC

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