FOD050L, FOD250L, FOD053L — LVTTL/LVCMOS 3.3V High Speed Transistor Optocouplers
July 2009
FOD050L, FOD250L: Single Channel
FOD053L: Dual Channel
LVTTL/LVCMOS 3.3V High Speed Transistor Optocouplers
Features
■
Low power consumption
■
High speed
■
Available in single channel 8-pin DIP (FOD250L),
Description
The FOD250L, FOD050L and FOD053L optocouplers
consist of an AlGaAs LED optically coupled to a high
speed photodetector transistor. These devices are speci-
fied for operation at a 3.3V supply voltage.
A separate connection for the bias of the photodiode
improves the speed by several orders of magnitude over
conventional
phototransistor optocouplers by reducing the base-
collector capacitance of the input transistor.
An internal noise shield provides superior common
mode rejection of CM
H
= 50kV/ms (typical) and CM
L
=
35kV/ms (typical).
■
■
■
■
8-pin SOIC (FOD050L) or dual channel 8-pin SOIC
(FOD053L)
Superior CMR – CM
H
= 50kV/µs (typical) and
CM
L
= 35kV/µs (typical)
Guaranteed performance over temperature:
0°C to 70°C
U.L. recognized (File # E90700)
VDE pending
Applications
■
Line receivers
■
Pulse transformer replacement
■
High speed logic ground isolation: LVTTL/LVCMOS
■
Wide bandwidth analog coupling
Schematics
Package Outlines
N/C 1
8 V
CC
+ 1
V
F1
8 V
CC
8
8
1
1
+ 2
V
F
_
3
7 V
B
_
2
7 V
01
6 V
O
_
3
6 V
02
8
1
8
1
V
F2
N/C 4
5 GND
+ 4
5 GND
Truth Table
FOD050L, FOD250L
FOD053L
LED
On
Off
V
O
LOW
HIGH
©2003 Fairchild Semiconductor Corporation
FOD050L, FOD250L, FOD053L Rev. 1.0.3
www.fairchildsemi.com
FOD050L, FOD250L, FOD053L — LVTTL/LVCMOS 3.3V High Speed Transistor Optocouplers
Absolute Maximum Ratings
(T
A
= 25°C unless otherwise specified.)
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
T
STG
T
OPR
T
SOL
EMITTER
I
F
(avg)
I
F
(pk)
I
F
(trans)
V
R
P
D
DETECTOR
I
O
(avg)
I
O
(pk)
V
EBR
V
CC
V
O
I
B
P
D
Average Output Current
Peak Output Current
Emitter-Base Reverse Voltage
Supply Voltage
Output Voltage
Base Current
Storage Temperature
Operating Temperature
Parameter
Value
-40 to +125
-40 to +85
260 for 10 sec
Each Channel
Each Channel
Each Channel
Each Channel
Each Channel
25
50
1.0
5
45
Units
°C
°C
°C
mA
mA
A
V
mW
Lead Solder Temperature (Wave solder only)
DC/Average Forward Input Current
Peak Forward Input Current
(50% duty cycle, 1ms P.W.)
Peak Transient Input Current
(≤1 µs P.W., 300pps)
Reverse Input Voltage
Input Power Dissipation
(No derating required up to 85°C)
Each Channel
Each Channel
FOD050L, FOD250L only
8
16
5
-0.5 to 7
-0.5 to 7
mA
mA
V
V
V
mA
mW
FOD050L, FOD250L only
Each Channel
5
100
Output Power Dissipation
(No derating required up to 85°C)
©2003 Fairchild Semiconductor Corporation
FOD050L, FOD250L, FOD053L Rev. 1.0.3
www.fairchildsemi.com
2
FOD050L, FOD250L, FOD053L — LVTTL/LVCMOS 3.3V High Speed Transistor Optocouplers
Electrical Characteristics
(T
A
= 0 to 70°C unless otherwise specified.)
Individual Component Characteristics
Symbol
EMITTER
V
F
B
VR
Input Forward Voltage
Input Reverse
Breakdown Voltage
Logic High Output
Current
Logic Low Supply
Current
I
F
= 16mA, T
A
=25°C
I
F
= 16mA
I
R
= 10µA
All
5.0
All
1.45
1.7
1.8
V
V
Parameter
Test Conditions
Device
Min.
Typ.*
Max.
Unit
DETECTOR
I
OH
I
CCL
I
F
= 0mA, V
O
= V
CC
= 3.3V,
T
A
= 25°C
I
F
= 16mA, V
O
= Open,
V
CC
= 3.3V
I
F1
= I
F2
= 16mA,
V
O
= Open, V
CC
= 3.3V
I
CCH
Logic High Supply
Current
I
F
= 0mA, V
O
= Open,
V
CC
= 3.3V, T
A
= 25°C
I
F
= 0mA, V
O
= Open,
V
CC
= 3.3V
**All Typicals at T
A
= 25°C
All
FOD050L
FOD250L
FOD053L
FOD050L
FOD250L
FOD053L
0.001
1
200
400
0.3
10
µA
µA
µA
Transfer Characteristics
Symbol
COUPLED
CTR
V
OL
Current Transfer Ratio
(1)
Logic Low Output
Voltage Output Voltage
I
F
= 16mA, V
O
= 0.4 V,
V
CC
= 3.3V, T
A
= 25°C
I
F
= 16mA, I
O
= 3mA,
V
CC
= 3.3V, T
A
= 25°C
All
All
15
50
0.3
%
V
Parameter
Test Conditions
Device
Min.
Typ.** Max.
Unit
*All Typicals at T
A
= 25°C
Note:
1. Current Transfer Ratio is defined as a ratio of output collector current, I
O
, to the forward LED input current, I
F
, times
100%.
©2003 Fairchild Semiconductor Corporation
FOD050L, FOD250L, FOD053L Rev. 1.0.3
www.fairchildsemi.com
3
FOD050L, FOD250L, FOD053L — LVTTL/LVCMOS 3.3V High Speed Transistor Optocouplers
Electrical Characteristics
(Continued) (T
A
= 0 to 70°C unless otherwise specified.)
Switching Characteristics
(V
CC
= 3.3V)
Symbol
T
PHL
T
PLH
|CM
H
|
Parameter
Propagation Delay
Time to Logic LOW
Propagation Delay
Time to Logic HIGH
Common Mode
Transient Immunity
at Logic HIGH
Test Conditions
R
L
= 1.9k
Ω
, I
F
= 16mA
(2)
(Fig. 10)
R
L
= 1.9k
Ω
, I
F
= 16mA
(2)
(Fig. 10)
25°C
25°C
Device
All
All
All
Min.
Typ.**
Max. Unit
1.0
2.0
1.0
2.0
µs
V/µs
V/µs
V/µs
µs
I
F
= 0mA, V
CM
= 1,000V
P-P
,
R
L
= 4.1k
Ω
, T
A
= 25°C
(3,4)
(Fig. 11)
I
F
= 0mA, V
CM
= 1,000V
P-P
,
T
A
= 25°C, R
L
= 1.9kΩ
(2,4)
(Fig. 11)
I
F
= 16mA, V
CM
= 1,000V
P-P
,
R
L
= 4.1kΩ. T
A
= 25°C
(3,4)
(Fig. 11)
I
F
= 16mA, V
CM
= 1,000 V
P-P
,
R
L
= 1.9kΩ
(2,4)
(Fig. 11)
5,000
5,000
50,000
50,000
35,000
|CM
L
|
Common Mode
Transient Immunity
at Logic LOW
All
5,000
5,000
35,000
V/µs
Isolation Characteristics
Symbol
I
I-O
Characteristics
Input-Output
Insulation Leakage
Current
Withstand Insulation
Test Voltage
Resistance
(input to output)
Capacitance
(input to output)
Test Conditions
Relative humidity = 45%,
T
A
= 25°C, t = 5s,
V
I-O
= 3000VDC
(5)
f = 60Hz, T
A
= 25°C,
t = 1 min.
(5)
V
I-O
= 500VDC
(5)
f = 1MHz
(5)
Device
All
Min.
Typ.**
Max.
1.0
Unit
µA
V
ISO
FOD050L
FOD053L
FOD250L
All
All
2500
5000
10
11
10
12
0.2
V
RMS
R
I-O
C
I-O
Ω
pF
*All Typicals at T
A
= 25°C
Notes:
2. The 1.9k
Ω
load represents 1 TTL unit load of 1.6mA and 5.6k
Ω
pull-up resistor.
3. The 4.1kΩ load represents 1 LSTTL unit load of 0.36mA and 6.1kΩ pull-up resistor.
4. Common mode transient immunity in logic high level is the maximum tolerable (positive) dV
cm
/dt on the leading
edge of the common mode pulse signal V
CM
, to assure that the output will remain in a logic high state
(i.e., V
O
> 2.0V). Common mode transient immunity in logic low level is the maximum tolerable (negative)
dV
cm
/dt on the trailing edge of the common mode pulse signal, V
CM
, to assure that the output will remain in a
logic low state (i.e., V
O
< 0.8V).
5. Device is considered a two terminal device: Pins 1, 2, 3 and 4 are shorted together and Pins 5, 6, 7 and 8 are
shorted together.
©2003 Fairchild Semiconductor Corporation
FOD050L, FOD250L, FOD053L Rev. 1.0.3
www.fairchildsemi.com
4
FOD050L, FOD250L, FOD053L — LVTTL/LVCMOS 3.3V High Speed Transistor Optocouplers
Typical Performance Curves
Fig. 1 LED Forward Current vs. Forward Voltage
100
1.3
Fig. 2 Current Transfer Ratio vs. Forward Current
(FOD050L, FOD053L)
CURRENT TRANSFER RATIO (Normalized)
V
O
= 0.4V
V
CC
= 3.3V
Normalized to
I
F
= 16mA, T
A
= 25°C
1.2
I
F
– FORWARD CURRENT (mA)
10
T
A
= 85°C
1
T
A
= 70°C
T
A
= 25°C
T
A
= 0°C
T
A
= -40°C
1.1
T
A
= 70°C
T
A
= 85°C
1.0
T
A
= 0°C
T
A
= 25°C
0.1
0.9
0.8
0.01
0.7
T
A
= -40°C
0.001
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
0.6
0
5
10
15
20
25
V
F
– FORWARD VOLTAGE (V)
I
F
– FORWARD CURRENT (mA)
Fig. 3 Current Transfer Ratio vs. Input Forward Current
(FOD250L)
CURRENT TRANSFER RATIO (Normalized)
1.4
1.3
1.2
Fig. 4 Current Transfer Ratio vs. Ambient Temperature
1.6
1.6
CURRENT TRANSFER RATIO (Normalized)
V
O
= 0.4V
V
CC
= 3.3V
T
A
= 85°C
T
A
= 70°C
Normalized to
I
F
= 16mA, T
A
= 25°C
1.4
1.2
1.2
1.1
1.0
0.9
0.8
0.7
T
A
= 25°C
1.0
1.0
0.8
0.8
T
A
= 0°C
0.6
0.6
0.4
0.4
T
A
= -40°C
0.6
0.5
0
5
10
15
20
25
0.2
0.2
0.0
-40
-20
0
20
40
60
80
100
0.0
I
F
– FORWARD CURRENT (mA)
T
A
– AMBIENT TEMPERATURE (°C)
Fig. 5 Output Current vs. Output Voltage
12
Fig 6. Logic High Output Current vs. Ambient Temperature
10
10
I
F
= 25mA
8
I
OH
– LOGIC HIGH OUTPUT CURRENT (nA)
T
A
= 25°C
V
CC
= 3.3V
V
O
= V
CC
= 3.3V
I
F
= 0
I
O
– OUTPUT CURRENT (mA)
1
20mA
6
15mA
4
0.1
10mA
2
5mA
0
0
2
4
6
8
10
12
14
16
0.01
-40
-20
0
20
40
60
80
100
V
O
– OUTPUT VOLTAGE (V)
T
A
– AMBIENT TEMPERATURE (°C)
©2003 Fairchild Semiconductor Corporation
FOD050L, FOD250L, FOD053L Rev. 1.0.3
www.fairchildsemi.com
5
I
C
– COLLECTOR CURRENT (mA)
I
LED
= 1mA
I
F
= 16mA
V
O
= 0.4V
V
CC
= 3.3V
Normalized to T
A
= 25°C
1.4
