epc110
To have still digital compatible signals a level conversion is necessary. Below you find some examples for such circuits for converting OUTH
levels to full CMOS compatible digital output.
+3.3V
R4
10k
VDD
R2
OUTH
12k
epc110
R1
3k6
VDD33
VDD18
PD
T1
BC846 B
LED
OUTN
OUTH
GND
R3
4k7
GND
Figure 9: Non-inverting, low power level shifter (additional current approx. 0.6mA)
+3.3V
+3.3V
R4
R5
22k
33k
VDD
R3
33k
VDD
R2
12k
OUTH
epc110
R1
1k5
epc110
R1
3k6
VDD33
VDD18
PD
VDD33
VDD18
PD
T1
BC846 B
T2
BC846 B
OUTH
LED
LED
OUTN
OUTH
OUTN
OUTH
T1
BC846 B
R2
10k
GND
R3
4k7
GND
GND
GND
Figure 10: Simple inverting level shifter
(additional current approx. 1.6mA or 2.6mA)
Figure 11: Inverting, low power level shifter
(additional current approx. 0.8 ... 1.0mA)
© 2011 ESPROS Photonics Corporation
Characteristics subject to change without notice
10
Datasheet epc110 - V2.1
www.espros.ch
EPC [ ESPROS PHOTONICS CORP ]
