ACPL-K49U
Wide Operating Temperature R
2
Coupler
TM
20 kBd Digital Optocoupler
Con gurable 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
Description
The ACPL-K49U is a single channel, high temperature,
high CMR, 20 kBd digital optocoupler, con gurable as
a low power, low leakage phototransistor, speci cally
for use in industrial applications. The stretched SO-8
stretched package outline is designed to be compatible
with standard surface mount processes.
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.
Avago R
2
Coupler isolation product provides with rein-
forced insulation and reliability that delivers safe signal
isolation critical in high temperature industrial applica-
tions
Functional Diagram
Features
High Temperature and Reliability low speed digital
interface for Industrial Application.
30 kV/s High Common-Mode Rejection at V
CM
= 1500 V
(typ)
Low Power, Low Leakage Phototransistor in a “4-pin
Con guration”
Compact, Auto-Insertable Stretched SO8 Packages
Wide Temperature Range: -40° C to +125° C
Low LED Drive Current: 4 mA (typ)
Low Propagation Delay: 20 s (max)
Worldwide Safety Approval:
– UL 1577 approval, 5 kV
RMS
/1 min.
– CSA Approval
– IEC/EN/DIN EN 60747-5-5
Applications
Industrial Low Speed Digital Signal Isolation Interface
Inverter Fault Feedback Signal Isolation
Switching Power Supplies Feedback Circuit
Note: The connection of a 0.1
F bypass capacitor between
pins 5 and 8 is recommended
for 5-pin con guration
Note: Pins 7 and 8 are externally
shorted for 4-pin con guration
8
7
6
5
1
2
3
4
V
CC
V
O
GND
ANODE
NC
CATHODE
NC
NC
8
7
6
5
1
2
3
4
V
O
GND
ANODE
NC
CATHODE
NC
NC
Truth Table
LED Vo
ON LOW
OFF HIGH
CAUTION: It is advised that normal static precautions be taken in handling and assembly
of this component to prevent damage and/or degradation which may be induced by ESD.
