ISO7420, ISO7420M, ISO7421

SLLS984I – JUNE 2009 – REVISED JULY 2015

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6.4 Thermal Information

ISO742x

THERMAL METRIC(1)

D (SOIC)

UNIT

8 PINS

Low-K Board

212

RθJA

Junction-to-ambient thermal resistance

°C/W

High-K Board

116.6

RθJC(top)

Junction-to-case (top) thermal resistance

71.6

°C/W

RθJB

Junction-to-board thermal resistance

57.3

°C/W

ψJT

Junction-to-top characterization parameter

28.3

°C/W

ψJB

Junction-to-board characterization parameter

56.8

°C/W

(1)

For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application

report, SPRA953.

6.5 Electrical Characteristics: VCC1 and VCC2 at 5 V ±5%

TA = –40°C to 125°C for ISO7420M, TA = –40°C to 105°C for ISO742x

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

IOH = –4 mA; see Figure 6.

VCCO

(1) – 0.8

4.6

VOH

High-level output voltage

V

IOH = –20 μA; see Figure 6.

VCCO – 0.1

5

IOL = 4 mA; see Figure 6.

0.2

0.4

VOL

Low-level output voltage

V

IOL = 20 μA; see Figure 6.

0

0.1

VI(HYS) Input threshold voltage hysteresis

400

mV

IIH

High-level input current

10

μA

INx at 0 V or VCCI

(1)

IIL

Low-level input current

–10

μA

CMTI

Common-mode transient immunity

VI = VCCI or 0 V; see Figure 8.

25

50

kV/

μs

SUPPLY CURRENT (ALL INPUTS SWITCHING WITH SQUARE WAVE CLOCK SIGNAL FOR DYNAMIC ICC MEASUREMENT)

ISO7420

ICC1

Supply current for VCC1

0.4

1

DC to 1 Mbps VI = VCCI or 0 V, 15 pF load

mA

ICC2

Supply current for VCC2

3

6

ISO7421

ICC1

Supply current for VCC1

2

4

DC to 1 Mbps VI = VCCI or 0 V, 15 pF load

mA

ICC2

Supply current for VCC2

2

4

(1)

VCCI = Input-side power supply, VCCO = Output-side power supply

8

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