Preliminary Rev. 0.6 7/15

Copyright © 2015 by Silicon Laboratories

Si88x4x

This information applies to a product under development. Its characteristics and specifications are subject to change without notice.

Si88x4x

Features

Applications

Safety Approval (Pending)

Description

The Si88xx integrates Silicon Labs’ proven digital isolator technology with an

on-chip isolated dc-dc converter that provides regulated output voltages of

3.3 or 5.0 V (or >5 V with external components) at peak output power levels

of up to 5 W. These devices provide up to four digital channels. The dc-dc

converter has user-adjustable frequency for minimizing emissions, a soft-start

function for safety, a shut-down option and loop compensation. The device

requires only minimal passive components and a miniature transformer.

The ultra-low-power digital isolation channels offer substantial data rate,

propagation delay, size and reliability advantages over legacy isolation

technologies. Data rates up to 100 Mbps max are supported, and all devices

achieve propagation delays of only 23 ns max. Ordering options include a

choice of dc-dc converter features, isolation channel configurations and a fail-

safe mode. All products are certified by UL, CSA, VDE, and CQC.

integrated dc-dc converter

feedback-controlled converter with

dithering for low EMI

83% with external power switch

external power switch

frequency control, and soft start



3/5 V to isolated 3/5 V



24 V to isolated 3/5 V supported



0–100 Mbps



18 ns typical prop delay

ultra-low emissions



SOIC-20 wide body



SOIC-24 wide body

100 kV/µs (typical)



–40 to +125 °C

vehicles



Up to 5000 Vrms for 1 minute



CSA component notice 5A

approval



VDE 0884-10



GB4943.1

Patents pending

Ordering Information:

See page 38.

Pin Assignments

See page 33

1

2

3

4

5

6

9

10

20

19

18

17

16

15

12

11

HF

XMTR

HF

XMTR

HF

RCVR

HF

RCVR

GNDP

VSW

VDDP

VDDA

GNDA

SH

A3

A4

GNDB

VDDB

DNC

NC

VSNS

COMP

B3

B4

7

8

14

13

A1

A2

B1

B2

HF

XMTR

HF

XMTR

HF

RCVR

HF

RCVR

Si88240