8 PIN SOP PHOTOTRANSISTOR                         
ELD20X / 21X series
DUAL CHANNEL PHOTOCOUPLER 
 
Features 
     
 Dual channel coupler 
 Current transfer ratios offered in narrow ranges 
  ELD205: 40-80% 
  ELD206: 63-125% 
  ELD207: 100-200% 
  ELD211: > 20% 
ELD213: > 100% 
ELD217: > 100% 
 
 High isolation voltage between input and output 
  Viso = 3750 Vrms  
 
 Operating temperature range of -55 to +110  
Schematic 
 High BVceo of 80V 
 Standard SO-8 footprint package 
 
 Pb free and RoHS compliant. 
 
 UL approved (No. E214129) 
 
 VDE approval (pending) 
 
 SEMKO approved 
 
 NEMKO approved 
 
 DEMKO approved 
 
 FIMKO approved 
 
1. Anode 
 CSA approved (No. 2007189) 
2. Cathode 
3. Anode 
 
4. Cathode 
Description 
5. Emitter 
 
6. Collector 
    The ELD20X and ELD21X series contains two infrared 
7. Emitter 
emitting diodes optically coupled to two phototransistor 
8. Collector 
detectors.  
The devices are packaged in an 8-pin small outline 
package which conforms to the standard SO-8 footprint. 
 
 
Applications 
 
z Feedback Control Circuits 
z Interfacing and coupling systems of different potentials and impedances 
z General Purpose Switching Circuits 
z Monitor and Detection Circuits 
 
 
 
 
 
  Everlight Electronics Co., Ltd.                              1                                      http:\\www.everlight.com    
  Document NoDPC-0000024   Rev.1                                                                   January 16, 2009  
 
                      
8 PIN SOP PHOTOTRANSISTOR                         
ELD20X / 21X series
DUAL CHANNEL PHOTOCOUPLER 
 
Absolute Maximum Ratings (T =25C) 
a
 
Parameter Symbol Rating Unit 
mA 
Forward current I 60 
F
A 
Peak forward current (t = 100s) I 1 
FM
Input 
V 
Reverse voltage V 6 
R
Power dissipation 
P 90 mW 
D 
No derating needed 
Collector power dissipation 
P 
150 mW 
C
No derating needed 
V 
Collector-Emitter voltage V 80 
Output CEO
V 
Collector-Base voltage V 80 
CBO
V 
Emitter-Collector voltage  V 7 
ECO
P 
Total power dissipation 250 mW 
tot
*1
Isolation voltage  V 
3750 Vrms 
iso
T 
Operating temperature -55~+110 C 
opr
T 
Storage temperature -55~+150 C 
stg
*2 
Soldering temperature    T 
260 C 
sol
 
Notes 
  
*1 AC for 1 minute, R.H.= 40 ~ 60% R.H. In this test, pins 1, 2 & 3 are shorted together, and pins 4, 5 & 6 
   are shorted together. 
  
*2 For 10 seconds. 
 
 
 
 
 
 
 
 
  Everlight Electronics Co., Ltd.                              2                                      http:\\www.everlight.com    
  Document NoDPC-0000024   Rev.1                                                                   January 16, 2009