HCPL-0560 Datasheet, PDF (11/16 Pages) Agilent(Hewlett-Packard) – Dual Channel Bi-directional High Speed Optoisolators

11
10 V
V_CM
90 %
10 %
90 %
10 %
t_R
V_O
t_F
5V
SWITCH AT A:
I_F = 0 mA
V_O
V_OL
SWITCH AT B: I_F = 16 mA
V_FF
A
R_F ^B
GND1
1
V_OA
2
V_CC1
3
V_INB
4
HCPL-0561
SHIELD
LED
LED
SHIELD
V_INA
8
V_CC2
7
V_OB
6
GND2
5
5V
0.1 µF
V_CM
+
–
PULSE GEN.
2
R_L
1.9 kΩ
V_O
C_L = 15 pF*
2
*INCLUDES PROBE AND
FIXTURE CAPACITANCE
Figure 14. Test Circuit for Transient Immunity and Typical Waveforms (HCPL-0561).
Application Information
The HCPL-0560 (common V_CC
configuration) and HCPL-0561
(common GND configuration)
optoisolators are ideal for use in
bi-directional data transmission
and communication applications.
Each of the two configurations
contains two optoisolators each
in an industry standard SOIC-8
package. Bi-directional here
implies that there are two
emitter-detector pairs assembled
in opposite direction across the
isolation barrier. This allows
simultaneous, bi-directional, full
duplex data transmission
capability within a single
optoisolator package.
The HCPL-0560 is internally
connected in a “common V_CC”
configuration, which means that
the LED anode of one channel is
connected to the V_CC pin of the
second channel on each side of
the isolation barrier. The HCPL-
0561 is internally connected in a
“common GND” configuration,
which means that the LED
cathode of one channel is
connected to the emitter or GND
of the second channel on each
side of the isolation barrier.
Having a maximum guaranteed
speed of 1 Mbd the HCPL-0560
and HCPL-0561 are ideal for
applications involving the
RS-232-E (TIA/EIA-232) data
transmission standard. If these
optoisolators are used in
RS-232-E applications, it is
understood that the optoisolators
will be used in conjunction with
an appropriate transceiver of the
RS-232-E standard.
The common V_CC configuration
(HCPL-0560) transmits non-
inverting signal with respect to
the cathode voltage of the LED
pins (4,8) in the driver
configuration shown Figure 15.
When the input signal at the base
of the driver transistor (2N3904)
is high, the input LED conducts
drive current, and allows the
output of the optoisolator to be in
the low state. Thus, when the
cathode voltage is low (LED ON)
the output is low, and when the
cathode voltage is high (LED
OFF) the output will be high. In
other words, HCPL-0560 can be
considered to transmit non-
inverting signal. The common
GND configuration (HCPL-0561)
transmits inverting signal with
respect to the anode voltage of
the LED pins (4,8) in the driver
configuration shown in Figure 16.