ACFL-5212T
Automotive R
2
Coupler
TM
Wide Operating Temperature 20kBd Digital
Optocoupler Congurable 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
component to prevent damage and/or degradation which may be induced by ESD. The components
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, congu-
rable as a low power, low leakage phototransistor, spe-
cically 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
• Qualied 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
Conguration” (I
(CEO)
< 5µA)
• 30 kV/µs High Common-Mode Rejection at V
CM
= 1500
V (typ)
• Low Propagation Delay: 20µs (max)
• Compact, Auto-Insertable Stretched SO12 Packages
• Worldwide Safety Approval:
- UL 1577 recognized, 5kV
RMS
/1 min.
- 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
V
CC1
V
OUT1
GND
1
AN2
CA2
CA2
12
11
10
9
8
7
V
CC2
V
OUT2
GND
2
AN1
CA1
GND
2
1
2
3
4
5
6
12
11
10
9
8
7
V
CC2
V
OUT2
GND
2
AN1
CA1
GND
2
V
CC1
V
OUT1
GND
1
AN2
CA2
CA2
Note: Pins 1 and 2 and pins 9 and 10 are externally
shorted for 4-pin conguration. Do not connect
bypass capacitors in this conguration.
