ACFL-5212T

Optocoupler Configurable as Low Power, Low Leakage Phototransistor

Data Sheet

Lead (Pb) Free

RoHS 6 fully

compliant

RoHS 6 fully compliant options available;

-xxxE denotes a lead-free product

CAUTION: It is advised that normal static precautions be taken in handling and assembly of this

featured in this datasheet are not to be used in military or aerospace applications or environments.

Description

The ACFL-5212T is an automotive grade dual channel, bi-

directional, high CMR, 20kBd digital optocoupler, configu-

rable as a low power, low leakage phototransistor, spe-

cifically for use in automotive applications. The stretched

SO-12 package outline is designed to be compatible with

standard surface mount processes and occupies the same

land area as the single channel equivalent, ACPL-K49T, in

stretched SO8 package.

This digital optocoupler uses an insulating layer between

the light emitting diode and an integrated photo detector

to provide electrical insulation between input and output.

Separate connections for the photodiode bias and output

transistor collector increase the speed up to a hundred

times over that of a conventional photo-transistor coupler

by reducing the base-collector capacitance.

Each channel is also galvanically isolated from each other

with no cross-talk.

Avago R2Coupler provides reinforced insulation and reli-

ability that delivers safe signal isolation critical in automo-

tive and high temperature industrial applications.

Functional Diagram

Features

• Qualified to AEC Q100 Grade 1 Guidelines

• Wide Temperature Range: -40°C to +125°C

• Low LED Drive Current: 4mA (typ)

• Low Power, Low Leakage Phototransistor in a “4-pin

V (typ)

• Low Propagation Delay: 20µs (max)

• Compact, Auto-Insertable Stretched SO12 Packages

• Worldwide Safety Approval:

- CSA Component Acceptance Notice#5A

- IEC/EN/DIN EN 60747-5-5

Applications

• Automotive Low Speed Digital Signal Isolation Interface

• Inverter Fault Feedback Signal Isolation

• Switching Power Supplies Feedback Circuit

Truth Table

LED

VO

ON

LOW

OFF

HIGH

Note: The connection of a 1 μF bypass

capacitor between pins 1 and 3 and

pins 8 and 10 is recommended.

1

2

3

4

5

6

AN2

CA2

CA2

12

11

10

9

8

7

AN1

CA1

1

2

3

4

5

6

12

11

10

9

8

7

AN1

CA1

AN2

CA2

CA2

Note: Pins 1 and 2 and pins 9 and 10 are externally

shorted for 4-pin configuration. Do not connect

bypass capacitors in this configuration.