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FOD073L
LVTTL/LVCMOS Compatible Low Input Current
High Gain Split Darlington Optocoupler
Features
Description
■ Low power consumption
The FOD073L optocoupler consists of an AlGaAs LED
optically coupled to a high gain split darlington photodetector. This device is specified to operate at a 3.3V
supply voltage.
■ Low input current: 0.5mA
■ Dual channel 8-pin SOIC package
■ High CTR: 400% minimum
■ High CMR: 10kV/µs
■ Guaranteed performance over temperature
0°C to 70°C
An integrated emitter – base resistor provides superior
stability over temperature.
The combination of a very low input current of 0.5mA
and a high current transfer ratio of 2000% (typical)
makes this device particularly useful for input interface to
MOS, CMOS, LSTTL and EIA RS232C, while output
compatibility is ensured to LVCMOS as well as high
fan-out LVTTL requirements.
■ U.L. recognized (File # E90700)
■ LVTTL/LVCMOS Compatible output
Applications
■ Digital logic ground isolation – LVTTL/LVCMOS
■ Telephone ring detector
■ EIA-RS-232C line receiver
An internal noise shield provides exceptional common
mode rejection of 10kV/µs.
■ High common mode noise line receiver
■ µP bus isolation
■ Current loop receiver
Schematic
Package Outline
+ 1
8 VCC
VF1
_ 2
_
3
7 V01
6 V02
VF2
+ 4
©2004 Fairchild Semiconductor Corporation
FOD073L Rev. 1.0
5 GND
Truth Table
LED
VO
ON
LOW
OFF
HIGH
www.fairchildsemi.com
FOD073L — LVTTL/LVCMOS Compatible Low Input Current High Gain Split Darlington Optocoupler
April 2009
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.
The absolute maximum ratings are stress ratings only.
Symbol
Parameter
Value
Units
TSTG
Storage Temperature
-40 to +125
°C
TOPR
Operating Temperature
-40 to +85
°C
TSOL
Lead Solder Temperature
(Wave solder only. See reflow profile for surface mount devices)
260 for 10 sec
°C
EMITTER
IF (avg)
DC/Average Forward Input Current
Each Channel
20
mA
IF (pk)
Peak Forward Input Current
(50% duty cycle, 1ms P.W.)
Each Channel
40
mA
Peak Transient Input Current (≤1µs P. W., 300 pps)
Each Channel
1.0
A
VR
Reverse Input Voltage
Each Channel
5
V
PD
Input Power Dissipation
Each Channel
35
mW
Average Output Current
Each Channel
60
mA
Emitter-Base Reverse Voltage (FOD070L, FOD270L)
Each Channel
0.5
V
Supply Voltage, Output Voltage
Each Channel
-0.5 to 7
V
Output power dissipation
Each Channel
100
mW
IF (trans)
DETECTOR
IO (avg)
VEB
VCC, VO
PD
©2004 Fairchild Semiconductor Corporation
FOD073L Rev. 1.0
www.fairchildsemi.com
2
FOD073L — LVTTL/LVCMOS Compatible Low Input Current High Gain Split Darlington Optocoupler
Absolute Maximum Ratings (No derating required up to 85°C)
Individual Component Characteristics
Symbol Parameter
Test Conditions
Min.
Typ.*
Max.
Unit
1.35
1.7
V
EMITTER
VF
Input Forward Voltage
TA =25°C
IF = 1.6mA (Each Channel)
BVR
Input Reverse
Breakdown Voltage
TA =25°C, IR = 10µA
(Each Channel)
1.75
5.0
V
DETECTOR
IOH
Logic High Output Current
IF = 0 mA, VO = VCC = 3.3V
(Each Channel)
0.05
25
µA
ICCL
Logic Low Supply Current
IF1 = IF2 = 1.6mA,
VO1 = VO2 = Open, VCC = 3.3V
0.8
3
mA
ICCH
Logic High Supply Current
IF1 = IF2 = 0mA,
VO1 = VO2 = Open, VCC = 3.3V
0.01
2
µA
Transfer Characteristics
Symbol
Parameter
CTR
COUPLED
Current Transfer Ratio
(Note 1)
VOL
Logic Low Output Voltage
Test Conditions
Min.
IF = 0.5mA, VO = 0.4V, VCC = 3.3V
400
Typ.*
Max.
Unit
7000
%
V
IF = 1.6mA, IO = 8mA, VCC = 3.3V
0.07
0.3
IF = 5mA, IO = 15mA, VCC = 3.3V
0.07
0.4
Switching Characteristics (VCC = 3.3 V)
Symbol Parameter
Typ.*
Max.
Unit
TPHL
Propagation Delay
Time to Logic LOW
RL = 4.7kΩ, IF = 0.5mA
(Fig. 9)
5
30
µs
TPLH
Propagation Delay
Time to Logic HIGH
RL = 4.7kΩ, IF = 0.5mA
(Fig. 9)
25
90
µs
|CMH|
Common Mode Transient IF = 0 mA, |VCM| = 10 VP-P, TA = 25°C,
Immunity at Logic HIGH RL = 2.2kΩ (Note 2) (Fig. 10)
Common Mode Transient IF = 1.6mA, |VCM| = 10 VP-P, RL = 2.2kΩ,
Immunity at Logic LOW
TA = 25°C (Note 2) (Fig. 10)
|CML|
Test Conditions
Min.
1,000
10,000
V/µs
1,000
10,000
V/µs
*All typicals at TA = 25°C
©2004 Fairchild Semiconductor Corporation
FOD073L Rev. 1.0
www.fairchildsemi.com
3
FOD073L — LVTTL/LVCMOS Compatible Low Input Current High Gain Split Darlington Optocoupler
Electrical Characteristics (TA = 0 to 70°C unless otherwise specified)
Isolation Characteristics
Symbol
II-O
Characteristics
Test Conditions
Input-Output Insulation
Leakage Current
Relative humidity = 45%, TA = 25°C,
t = 5 s, VI-O = 3000 VDC (Note 3)
VISO
Withstand Insulation Test
Voltage
RH ≤ 50%, TA = 25°C, II-O ≤ 2µA,
t = 1 min. (Note 3)
RI-O
Resistance (Input to Output)
VI-O = 500 VDC (Note 3)
CI-O
Capacitance (Input to Output) f = 1 MHz (Notes 3, 4)
Min.
Typ.*
Max.
Unit
1.0
µA
2500
VRMS
1012
Ω
0.7
pF
II-I
Input-Input Insulation
Leakage Current
RH ≤ 45%, VI-I = 500 VDC (Note 5)
RI-I
Input-Input Resistance
VI-I = 500 VDC (Note 5)
1011
Ω
CI-I
Input-Input Capacitance
f = 1 MHz (Note 5)
0.03
pF
0.005
µA
*All typicals at TA = 25°C
Notes:
1. Current Transfer Ratio is defined as a ratio of output collector current, IO, to the forward LED input current, IF, times
100%.
2. Common mode transient immunity in logic high level is the maximum tolerable (positive) dVCM/dt on the leading
edge of the common mode pulse signal, VCM, to assure that the output will remain in a logic high state
(i.e., VO > 2.0V). Common mode transient immunity in logic low level is the maximum tolerable (negative) dVCM/dt
on the trailing edge of the common mode pulse signal, VCM, to assure that the output will remain in a logic low state
(i.e., VO