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FOD270L Schematic ( PDF Datasheet ) - Fairchild Semiconductor

Teilenummer FOD270L
Beschreibung (FOD070L - FOD270L) LVTTL/LVCMOS COMPATIBLE LOW INPUT CURRENT HIGH GAIN SPLIT DARLINGTON OPTOCOUPLERS
Hersteller Fairchild Semiconductor
Logo Fairchild Semiconductor Logo 




Gesamt 17 Seiten
FOD270L Datasheet, Funktion
LVTTL/LVCMOS COMPATIBLE LOW INPUT
CURRENT HIGH GAIN SPLIT DARLINGTON
OPTOCOUPLERS
SINGLE CHANNEL:
DUAL CHANNEL:
FOD070L
FOD073L
FOD270L
DESCRIPTION
The FOD070L, FOD270L and FOD073L optocouplers consist of an AlGaAs
LED optically coupled to a high gain split darlington photodetector. These
devices are specified to operate at a 3.3V supply voltage.
The split darlington configuration separating the input photodiode and the first
stage gain from the output transistor permits lower output saturation voltage
and higher speed operation than possible with conventional darlington
phototransistor optocoupler. In the dual channel device FOD073L, an inte-
grated emitter – base resistor provides superior stability over temperature.
The combination of a very low input current of 0.5 mA and a high current
transfer ratio of 2000% makes this family 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.
An internal noise shield provides exceptional common mode rejection of
10 kV/µs.
FEATURES
• Low power consumption
• Low input current - 0.5 mA
• Available in single channel 8-pin DIP (FOD270L), 8-pin SOIC (FOD070L)
and dual channel 8-pin SOIC
• High CTR-2000%
• High CMR-10 kV/µs
• Guaranteed performance over temperature 0°C to 70°C
• U.L. recognized (File # E90700)
• LVTTL/LVCMOS Compatible output
APPLICATIONS
• Digital logic ground isolation – LVTTL/LVCMOS
• Telephone ring detector
• EIA-RS-232C line receiver
• High common mode noise line receiver
• µP bus isolation
• Current loop receiver
TRUTH TABLE
LED
ON
OFF
VO
LOW
HIGH
8
1
8
1
8
N/C 1
+2
V
F
_3
N/C 4
8
V
CC
7
V
B
6V
O
5 GND
FOD070L / FOD270L
1
+1
V
F1
_2
_3
V
F2
+4
8
V
CC
7
V
01
6V
02
5 GND
FOD073L
© 2004 Fairchild Semiconductor Corporation
Page 1 of 17
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FOD270L Datasheet, Funktion
SINGLE CHANNEL:
DUAL CHANNEL:
LVTTL/LVCMOS COMPATIBLE LOW INPUT
CURRENT HIGH GAIN SPLIT DARLINGTON
OPTOCOUPLERS
FOD070L
FOD073L
FOD270L
TYPICAL PERFORMANCE CURVES
Fig. 7 Supply Current vs Input Forward Current
(FOD270L, FOD070L, FOD073L)
10
TA = 25°C
VCC = 3.3V
FOD270L
or FOD070L
1 FOD073L
0.1
0.01
0.1
1 10
IF - Input Forward Current (mA)
Fig. 9 Output Current vs Input Forward Current
(FOD070L only)
Fig. 8 Output Current vs Input Forward Current
(FOD270L only)
100
TA = 85°C
TA = -40°C
TA = 0°C
10
TA = 25°C
TA = 70°C
1
0.1 1
VO = 0.4V
VCC = 3.3V
TA = 25°C
10
IF - Input Forward Current (mA)
Fig. 10 Output Current vs Input Forward Current
(FOD073L only)
100
TA = 70°C, 85°C
10
TA = -40°C
TA = 0°C
TA = 25°C
1
0.1 1
VO = 0.4V
VCC = 3.3V
TA = 25°C
10
IF - Forward Current (mA)
Fig. 11 Propagation Delay vs.
Input Forward Current (FOD070L only)
5
TA = 25°C
VCC = 3.3V
RL = 4.7k
4
1/f = 100µs
Duty Cycle = 10%
tPLH
3
54
52
50
2 48
1 46
tPHL
0 44
0 1 2 3 4 5 6 7 8 9 10
IF - Input Forward Current (mA)
100
TA = 70°C, 85°C
10
TA = -40°C
TA = 0°C
TA = 25°C
1
0.1
0.1
1 10
IF - Forward Current (mA)
VO = 0.4V
VCC = 3.3V
TA = 25°C
Fig. 12 Propagation Delay vs.
Ambient Temperature (FOD073L only)
70
VCC = 3.3V
IF = 0.5mA
60 RL = 4.7k
1/f = 100µs
Duty Cycle = 10%
50
40
tPLH
30
20
10
tPHL
0
-40
-20
0 20 40 60 80 100
TA - Ambient Temperature (°C)
© 2004 Fairchild Semiconductor Corporation
Page 6 of 17
8/10/04

6 Page









FOD270L pdf, datenblatt
LVTTL/LVCMOS COMPATIBLE LOW INPUT
CURRENT HIGH GAIN SPLIT DARLINGTON
OPTOCOUPLERS
SINGLE CHANNEL:
DUAL CHANNEL:
FOD070L
FOD073L
FOD270L
ORDERING INFORMATION
Option
S
SD
SV
SDV
T
TV
R1
R1V
R2
R2V
V
Order Entry Identifier
FOD270LS
FOD270LSD
Pending approval
Pending approval
FOD270LT
Pending approval
FOD070LR1
Pending approval
FOD070LR2
Pending approval
Pending approval
Description
Surface Mount Lead Bend (DIP Package Only)
Surface Mount; Tape and reel (DIP Package Only)
(1000 units per reel)
Surface Mount; VDE 0884 (DIP Package Only)
Surface Mount; Tape and reel (DIP Package Only); VDE 0884
(1000 units per reel)
0.4" lead spacing (DIP Package Only)
0.4" lead spacing, VDE 0884 (DIP Package Only)
Tape and reel (500 units per reel) (SOIC 8 Package only)
VDE, Tape and reel (500 units per reel) (SOIC 8 Package only)
Tape and reel (2500 units per reel) (SOIC 8 Package only)
VDE 0884, Tape and reel (2500 units per reel) (SOIC 8 Package only)
VDE 0884
MARKING INFORMATION (FOD070L, FOD073L)
1 70L 2
V X YY S 6
3 45
Definitions
1 Fairchild logo
2 Device number
3
VDE mark (Note: Only appears on parts ordered with VDE
option – See order entry table)
4 One digit year code, e.g., ‘3’
5 Two digit work week ranging from ‘01’ to ‘53’
6 Assembly package code
© 2004 Fairchild Semiconductor Corporation
Page 12 of 17
8/10/04

12 Page





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