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OPTOLOGIC(R) 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 O 0.133 (3.4) O 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 VCC PIN 4 VO
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(R) 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
(c) 2004 Fairchild Semiconductor Corporation
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OPTOLOGIC(R) 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
(c) 2004 Fairchild Semiconductor Corporation
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OPTOLOGIC(R) OPTICAL INTERRUPTER SWITCH
H21LTB
Schematics
H21LTI
H21LOB
H21LOI
ANODE (1)
VOLTAGE REGULATOR
VCC (3)
H21LTB
LA VOUT (4)
Totem-Pole Output Buffer
CATHODE (2)
GND (5)
ANODE (1)
VOLTAGE REGULATOR
VCC (3)
H21LTI
LA VOUT (4)
Totem-Pole Output inverter
CATHODE (2)
GND (5)
ANODE (1)
VCC (3) VOLTAGE REGULATOR VOUT (4) LA
H21LOB
Open-Collector Output Buffer
CATHODE (2)
GND (5)
ANODE (1)
VCC (3) VOLTAGE REGULATOR VOUT (4) LA
H21LOI
Open-Collector Output Inverter
CATHODE (2)
GND (5)
(c) 2004 Fairchild Semiconductor Corporation
Page 3 of 9
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OPTOLOGIC(R) OPTICAL INTERRUPTER SWITCH
H21LTB H21LTI H21LOB H21LOI
Absolute Maximum Ratings (TA = 25C 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) IO VCC VO PD 50 4.0 to 16 30 150 mA V V mW IF VR PD 50 6 100 mA V mW Symbol TOPR TSTG TSOL-I TSOL-F Rating -40 to +85 -40 to +85 240 for 5 sec 260 for 10 sec Units C C C C
(c) 2004 Fairchild Semiconductor Corporation
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OPTOLOGIC(R) OPTICAL INTERRUPTER SWITCH
H21LTB H21LTI H21LOB H21LOI
Electrical/Optical Characteristics (TA =25C)
Parameter Test Conditions Symbol Min. Typ Max. Units
Input (Emitter)
Forward Voltage Reverse Leakage Current IF = 20 mA VR = 5 V VCC = 5 V VF IR ICC -- -- 1.5 10 V A
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 VCC = 5 V, RL = 360 (See Fig, 9) VCC = 5 V, RL = 360 (See Fig, 9) IF = 0 mA, VCC = 5 V, RL = 100 IF = 15 mA, VCC = 5 V, RL = 360 IF = 15 mA, VCC = 5 V, IOH = -800 A IF = 0 mA, VCC = 5 V, IOH = -800 A IF = 0 mA, VCC = 5 V, IOH = -800 A IF = 0 mA, VCC = 5 V, VOH = 30 V VCC = 5 V, RL = 360 VCC = 5 V, RL = 360 VOL VOL VOH VOH IOH IOH IF(+) IF(-) IF(+) / IF(-) tPLH, tPHL tr, tf -- -- 0.50 1.2 5 70 s ns -- -- 2.4 2.4 0.4 0.4 -- -- 100 100 15 -- V V V V A A mA mA
Notes: (Applies to Max Ratings and Characteristics Tables.) 1. Derate power dissipation linearly 1.67 mW/C above 25C. 2. Derate power dissipation linearly 2.50 mW/C above 25C. 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.
(c) 2004 Fairchild Semiconductor Corporation
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OPTOLOGIC(R) OPTICAL INTERRUPTER SWITCH
H21LTB H21LTI H21LOB H21LOI
Figure 1. Output Voltage vs. Input Current (Inverters)
6 VOH 5 VCC = 5 V RL = 270 TA = 25C
Figure 2. Output Voltage vs. Input Current (Buffers)
6 VCC = 5 V RL = 270 TA = 25C VOH
5
VO- Output Voltage (V)
VO- Output Voltage (V)
4
4
3 IF (OFF) 2 IF (ON)
3 IF (OFF) 2 IF (ON)
1 VOL 0 0 1 2 3 4 5
1 VOL 0 0 1 2 3 4 5
IF - Input Current (mA)
IF - Input Current (mA)
Figure 3. Normalized Threshold Current vs. Shield Distance
10 Black Shield Black Shield d 0 1.6
Figure 4. Normalized Threshold Current vs. Supply Voltage
Normalized to: Turn ON Threshold VCC = 5 V TA = 25C IF (ON)
IF(ON) - Normalized Threshold Current
+ E
D +
d 0
IF - Normalized Threshold Current
1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0
IF (OFF)
1
Normalized to: VCC = 5 V IF = 20 mA Pulsed Pulse Width = 100 s Duty Cycle = 0.1%
0
1
2
3
4
5
6
7
8
2
4
6
8
10
12
14
16
d - Distance (mm)
VCC - Supply Voltage (V)
(c) 2004 Fairchild Semiconductor Corporation
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OPTOLOGIC(R) OPTICAL INTERRUPTER SWITCH
H21LTB H21LTI H21LOB
100 1.8 Normalized to: VCC = 5 V TA = 25C TA = 25C 80
H21LOI
Figure 5. Normalized Threshold Current vs. Ambient Temperature
Figure 6. Forward Current vs. Forward Voltage
IF - Normalized Threshold Current
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -40 -20 0 IF (ON) IF (OFF)
IF (OFF) IF (ON)
IF - Forward Current (mA)
60
40
20
0 1.0 20 40 60 80 100
1.1
1.2
1.3
1.4
1.5
1.6
VF - Forward Voltage (V)
TA - Ambient Temperature (C)
Figure 7. Low Output Voltage vs. Output Current
1 VCC = 5 V TA = 25C IF = 10 mA
Figure 8. Response Time vs. Forward Current
5 VCC = 5 V RL = 270 4
VOL- Output Voltage, Low (V)
Response Delay Time (us)
TA = 25C IF Pulsed T = 10 ms Duty Cycle = 50% TPLH
3
0.1
2 TPHL 1
0.01 1 10
0 0 5 10 15 20
IO - Output Current (mA)
IF - Forward Current (mA)
(c) 2004 Fairchild Semiconductor Corporation
Page 7 of 9
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OPTOLOGIC(R) OPTICAL INTERRUPTER SWITCH
H21LTB H21LTI H21LOB H21LOI
Figure 9. Switching Speed Test Circuit
Figure 10. Typical Operating Circuit
C2 5V R1 R2 Pulse Generator VO = 5V f = 10 KHz d.c. = 50% R 1 = 360 R 2 = 180 C 1 = 15 pf C 2 = 20 pf C1 GND .1 uf bypass + V IN R IN RL
VCC
VO
.1 uf bypass
GND C 1 and C2 include probe and stray wire capacitance clude probe and apacitance
Figure 11. Switching Times Definition for Buffers
Figure 12. Switching Times Definition for Inverters
50%
50%
0 mA
0 mA
t PLH VOH 90%
t PHL
t PHL VOH 50% Output VO
t PLH
Output VO
10%
10%
90%
VOL
10%
90%
90% VOL
10%
tr
tf
tf
tr
(c) 2004 Fairchild Semiconductor Corporation
Page 8 of 9
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OPTOLOGIC(R) OPTICAL INTERRUPTER SWITCH
H21LTB H21LTI H21LOB H21LOI
DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
(c) 2004 Fairchild Semiconductor Corporation
Page 9 of 9
11/2/04

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