OPTOLOGIC
®
OPTICAL
INTERRUPTER SWITCH
H21LTB
H21LTI
PACKAGE DIMENSIONS
0.972 (24.7)
0.957 (24.3)
0.472 (12.0)
0.457 (11.6)
C
L
Ø 0.133 (3.4)
Ø 0.126 (3.2)
(2X)
H21LOB
H21LOI
0.249 (6.35)
0.243 (6.15)
+
E
D
+
C
L
0.39 (1.00)
0.34 (0.85)
0.755 (19.2)
0.745 (18.9)
0.129 (3.3)
0.119 (3.0)
0.103 (2.60) NOM
0.433 (11.0)
0.422 (10.7)
Optical
C
L
0.125 (3.2)
0.119 (3.0)
0.250 (6.36)
0.216 (5.50)
0.350 (8.9)
0.330 (8.4)
C
L
0.315 (8.0)
0.350 (8.9)
0.330 (8.4)
0.055 (1.40)
0.045 (1.14)
0.055 (1.40)
0.045 (1.14)
0.110 (2.8)
0.091 (2.3)
PIN 1 ANODE
PIN 2 CATHODE
PIN 3 V
CC
PIN 4 V
O
Features
• Low cost
• 0.035" apertures
• Black plastic opaque housing
• Mounting tabs on housing
• Choice of inverter or buffer output functions
• Choice of open-collector or totem-pole output
configuration
• TTL/CMOS compatible output functions
2
1
3
4
5
0.020 (0.51) (SQ)
PIN 5 GND
NOTES:
1. Dimensions for all drawings are in inches (mm).
2. Tolerance of ± .010 (.25) on all non-nominal dimensions unless
otherwise specified.
Description
The H21L series are slotted optical switches designed for multipurpose non contact sensing. They consist of a GaAs LED and a
silicon OPTOLOGIC
®
sensor packaged in an injection molded housing and facing each other across a .124" (3.15 mm) gap. The
output is either inverting or non-inverting, with a choice of totem-pole or open-collector configuration for TTL/CMOS compatibility
© 2004 Fairchild Semiconductor Corporation
Page 1 of 9
11/2/04
OPTOLOGIC
®
OPTICAL
INTERRUPTER SWITCH
H21LTB
Part Number Definitions
H21LTB
H21LTI
H21LOB
H21LOI
Totem-pole, buffer output
Totem-pole, inverter output
Open-collector, buffer output
Open-collector, inverter output
H21LTI
H21LOB
H21LOI
Input/Output Table
Part Number
H21LTB
H21LTB
H21LTI
H21LTI
H21LOB
H21LOB
H21LOI
H21LOI
LED
On
Off
On
Off
On
Off
On
Off
Output
High
Low
Low
High
High
Low
Low
High
© 2004 Fairchild Semiconductor Corporation
Page 2 of 9
11/2/04
OPTOLOGIC
®
OPTICAL
INTERRUPTER SWITCH
H21LTB
Schematics
H21LTI
H21LOB
H21LOI
ANODE (1)
VOLTAGE
REGULATOR
V
CC
(3)
H21LTB
LA
V
OUT
(4)
Totem-Pole Output Buffer
CATHODE (2)
GND (5)
ANODE (1)
VOLTAGE
REGULATOR
V
CC
(3)
H21LTI
LA
V
OUT
(4)
Totem-Pole Output inverter
CATHODE (2)
GND (5)
ANODE (1)
V
CC
(3)
VOLTAGE
REGULATOR
V
OUT
(4)
LA
H21LOB
Open-Collector Output Buffer
CATHODE (2)
GND (5)
ANODE (1)
V
CC
(3)
VOLTAGE
REGULATOR
V
OUT
(4)
LA
H21LOI
Open-Collector Output Inverter
CATHODE (2)
GND (5)
© 2004 Fairchild Semiconductor Corporation
Page 3 of 9
11/2/04
OPTOLOGIC
®
OPTICAL
INTERRUPTER SWITCH
H21LTB
H21LTI
H21LOB
H21LOI
Absolute Maximum Ratings
(T
A
= 25°C unless otherwise specified)
Parameter
Operating Temperature
Storage Temperature
Soldering Temperature (Iron)
(3,4,5,6)
Soldering Temperature (Flow)
(3,4,6)
Input (Emitter)
Continuous Forward Current
Reverse Voltage
Power Dissipation
(1)
Output (Sensor)
Output Current
Supply Voltage
Output Voltage
Power Dissipation
(2)
I
O
V
CC
V
O
P
D
50
4.0 to 16
30
150
mA
V
V
mW
I
F
V
R
P
D
50
6
100
mA
V
mW
Symbol
T
OPR
T
STG
T
SOL-I
T
SOL-F
Rating
-40 to +85
-40 to +85
240 for 5 sec
260 for 10 sec
Units
°C
°C
°C
°C
© 2004 Fairchild Semiconductor Corporation
Page 4 of 9
11/2/04
OPTOLOGIC
®
OPTICAL
INTERRUPTER SWITCH
H21LTB
H21LTI
H21LOB
H21LOI
Electrical/Optical Characteristics
(T
A
=25°C)
Parameter
Test Conditions
Symbol
Min.
Typ
Max.
Units
Input (Emitter)
Forward Voltage
Reverse Leakage Current
I
F
= 20 mA
V
R
= 5 V
V
CC
= 5 V
V
F
I
R
I
CC
—
—
1.5
10
V
µA
Output (Sensor)
Supply Current
—
5
mA
Coupled
Low Level Output Voltage
H21LTB, H21LOB
Low Level Output Voltage
H21LTI, H21LOI
High Level Output Voltage
H21LTB
High Level Output Voltage
H21LTI
High Level Output Current
H21LOB
High Level Output Current
H21LOI
Turn on Threshold Current
Turn off Threshold Current
Hysteresis Ratio
Propagation Delay
Output Rise and Fall Time
V
CC
= 5 V, R
L
= 360
Ω
(See Fig, 9)
V
CC
= 5 V, R
L
= 360
Ω
(See Fig, 9)
I
F
= 0 mA, V
CC
= 5 V, R
L
= 100
Ω
I
F
= 15 mA, V
CC
= 5 V, R
L
= 360
Ω
I
F
= 15 mA, V
CC
= 5 V, I
OH
= -800 µA
I
F
= 0 mA, V
CC
= 5 V, I
OH
= -800 µA
I
F
= 0 mA, V
CC
= 5 V, I
OH
= -800 µA
I
F
= 0 mA, V
CC
= 5 V, V
OH
= 30 V
V
CC
= 5 V, R
L
= 360
Ω
V
CC
= 5 V, R
L
= 360
Ω
V
OL
V
OL
V
OH
V
OH
I
OH
I
OH
I
F
(+)
I
F
(-)
I
F
(+) / I
F
(-)
t
PLH
, t
PHL
t
r
, t
f
—
—
0.50
1.2
5
70
µs
ns
—
—
2.4
2.4
0.4
0.4
—
—
100
100
15
—
V
V
V
V
µA
µA
mA
mA
Notes:
(Applies to Max Ratings and Characteristics Tables.)
1. Derate power dissipation linearly 1.67 mW/°C above 25°C.
2. Derate power dissipation linearly 2.50 mW/°C above 25°C.
3. RMA flux is recommended.
4. Methanol or isopropyl alcohols are recommended as cleaning agents.
5. Soldering iron 1/16" (1.6mm) from housing.
6. As long as leads are not under any stress or spring tension.
© 2004 Fairchild Semiconductor Corporation
Page 5 of 9
11/2/04
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