I
NTEGRATED
C
IRCUITS
D
IVISION
CPC5001
6 www.ixysic.com R02
3 Performance Characteristics
4 Functional Description
4.1 Introduction
The CPC5001 combines the functions of two input
buffer/LED driver gates and two unidirectional logic
optoisolators in a single 8-pin package. The isolators
are arranged for one input and one output at each side
of the isolation barrier, which enables Channel 1 to
send signals from side A to Side B, and Channel 2 to
send signals from the Side B to the Side A. If different
supply voltage levels are used at each side, then the
part, in conjunction with its external pullup resistors,
will perform logic level translation for V
DD
between
2.7V and 5.5V at either side.
The part provides galvanic isolation for voltages up to
3750V
rms
. Its CMOS circuitry includes a bandgap
reference to ensure that the LEDs receive consistent
drive current levels over the allowed range of V
DD
voltages. The supply currents at I
DDA
and I
DDB
are
much smaller than those required by bipolar solutions,
and are stable over temperature. The circuits also
ensure that the I
DD
current into each V
DD
package pin
remains constant for both high and low input signals.
This can greatly reduce the size of external decoupling
capacitors when compared with optoisolators
fabricated in a bipolar process wherein the supply
current can double when the LED is on.
The rotationally symmetric pinout ensures that the
part operates normally even if installed with 180°
rotation.
Temperature (ºC)
-40 -20 0 20 40 60 80100
Output Voltage (V)
0.25
0.30
0.35
0.40
0.45
0.50
0.55
Typical Output Voltage, V
OLA
, V
OLB
vs. Temperature
(I
SINKA
=6mA)
V
DD
=2.7V
V
DD
=3.3V
V
DD
=5.5V
Supply Voltage (V)
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Supply Current (mA)
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Supply Current I
DDA
, I
DDB
vs. Supply Voltage
Supply Voltage (V)
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Voltage Out (V)
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0.55
0.60
Logic-Low Output Level V
OL
vs. Supply Voltage
(I
SINK
=6mA)
Temperature (ºC)
-40 -20 0 20 40 60 80 100
Propagation Delay (ns)
40
60
80
100
120
140
160
Propagation Delay A to B and B to A
(V
DD
=3.3V, C
L
=20pF, R
PU
=475Ω)
t
PHL
t
PLH
Temperature (ºC)
-40 -20 0 20 40 60 80 100
Supply Current (mA)
4.5
4.6
4.7
4.8
4.9
5.0
5.1
5.2
5.3
5.4
5.5
Supply Current I
DDA
, I
DDB
vs. Temperature
(V
DD
=5.5V, R
PU
=820Ω)
Supply Voltage (V)
V
X
/ V
DD
0.30
0.35
0.40
0.45
0.50
0.55
0.60
0.65
0.70
V
IL
Falling, V
IH
Rising
vs. Supply Voltage
V
IH
V
IL
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
