1

2

3

4

5

6

7

8

ISO7520C

9

10

11

12

13

14

15

16

OUTA

GND 1

VCC 1

GND 1

INB

GND 2

GND 2

INA

OUTB

VCC 2

NC

NC

NC

NC

NC

NC

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

NC

INA

GND 1

VCC 1

GND 1

INB

GND 2

GND 2

OUTA

NC

OUTB

VCC 2

NC

NC

NC

NC

NC = No Internal Connection

ISO7521C

ISO7520C

ISO7521C

www.ti.com

SLLSE39C

– JUNE 2010 – REVISED DECEMBER 2011

Low-Power 5 KV(rms) Dual Digital Isolators

Check for Samples: ISO7520C, ISO7521C

The devices have TTL input thresholds and require

1

FEATURES

two supply voltages, 3.3V or 5V, or any combination.

•

Highest Signaling Rate: 1 Mbps

All inputs are 5-V tolerant when supplied from a 3.3-V

•

Propagation Delay Less Than 20 ns

supply.

•

Low Power Consumption

Note: The ISO7520C and ISO7521C are specified for

•

Wide Ambient Temperature:

–40°C to 105°C

signaling rates up to 1 Mbps. Due to their fast

response time, under most cases, these devices will

•

Safety and Regulatory Approvals

also transmit data with much shorter pulse widths.

– UL 1577 Approved with 4243 Vrms Rating

Designers should add external filtering to remove

– CSA CA Notice 5A, IEC 60747-5-2,

spurious signals with input pulse duration

< 20 ns if

IEC 60601-1, 60950-1, and 61010-1

desired.

Approved

•

50 kV/

µs Transient Immunity Typical

•

Operates From 3.3V or 5V Supply and Logic

Levels

APPLICATIONS

•

Opto-Coupler Replacement in:

– Medical Applications for IEC 60601-1

(5 KVrms Rated)

– Industrial Field-Bus

– ProfiBus

– ModBus

– DeviceNetTM Data Buses

– Servo Control Interface

– Motor Control

– Power Supply

– Battery Packs

DESCRIPTION

The ISO7520C and ISO7521C provide galvanic

isolation of up to 4243 Vrms for 1 minute per UL.

These devices are also certified to 5000 Vrms

reinforced insulation per end equipment standards

IEC 60950-1, 61010-1, and 60601-1. These digital

isolators

have

two

isolated

channels

with

uni-directional

(ISO7520C)

and

bi-directional

(ISO7521C) channel configurations. Each isolation

channel has a logic input and output buffer separated

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.

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright

© 2010–2011, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.