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OPTOLOGIC(R) OPTICAL INTERRUPTER SWITCH H21LTB
0.472 (12.0) 0.457 (11.6) C L
H21LTI
PACKAGE DIMENSIONS
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
PART NUMBER DEFINITIONS
H21LTB H21LTI H21LOB H21LOI Totem-pole, buffer output Totem-pole, inverter output Open-collector, buffer output Open-collector, inverter output
0.125 (3.2) 0.119 (3.0) C L
0.315 (8.0)
INPUT/OUTPUT TABLE
0.055 (1.40) 0.045 (1.14)
Part
0.110 (2.8) 0.091 (2.3) PIN 1 ANODE PIN 2 CATHODE
0.295 (7.5) 0.272 (6.9)
0.055 (1.40) 0.045 (1.14)
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
2
3 4
PIN 3 V CC PIN 4 V O 0.020 (0.51) (SQ) PIN 5 GND
1
5
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
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
2001 Fairchild Semiconductor Corporation DS300294 5/29/01
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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)
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OPTOLOGIC(R) OPTICAL INTERRUPTER SWITCH H21LTB H21LTI H21LOB H21LOI
ABSOLUTE MAXIMUM RATINGS
Parameter Operating Temperature Storage Temperature Soldering Temperature INPUT (EMITTER) Continuous Forward Current Reverse Voltage Power Dissipation(1) OUTPUT (SENSOR) Output Current Supply Voltage Output Voltage Power Dissipation(2) (Iron)(3,4,5,6) Soldering Temperature (Flow)(3,4,6)
(TA = 25C unless otherwise specified) Symbol TOPR TSTG TSOL-I TSOL-F IF VR PD IO VCC VO PD Rating -40 to +85 -40 to +85 240 for 5 sec 260 for 10 sec 50 6 100 50 4.0 to 16 30 150 Units C C C C mA V mW mA V V mW
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.
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OPTOLOGIC(R) OPTICAL INTERRUPTER SWITCH H21LTB H21LTI H21LOB
(TA =25C)
SYMBOL MIN. TYP. MAX. UNITS
H21LOI
ELECTRICAL / OPTICAL CHARACTERISTICS
PARAMETER TEST CONDITIONS
INPUT (EMITTER) Forward Voltage Reverse Leakage Current OUTPUT (SENSOR) Supply Current 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
IF = 20 mA VR = 5 V VCC = 5 V 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 VCC = 5 V, RL = 360 VCC = 5 V, RL = 360 (See Fig, 9) (See Fig, 9)
VF IR ICC VOL VOL VOH VOH IOH IOH IF(+) IF(-) IF(+) / IF(-) tPLH, tPHL tr, tf
-- -- -- -- -- 2.4 2.4
1.5 10 5 0.4 0.4 -- -- 100
V A mA V V V V A A mA mA s ns
-- -- 0.50 1.2 5 70
100 15 --
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OPTOLOGIC(R) OPTICAL INTERRUPTER SWITCH H21LTB H21LTI H21LOB H21LOI
Fig. 1 Output Voltage vs. Input Current (Inverters)
6 VOH 5 VCC = 5 V RL = 270 TA = 25C 6
Fig. 2 Output Voltage vs. Input Current (Buffers)
5
VCC = 5 V RL = 270 TA = 25C
VOH
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)
Fig. 3 Normalized Threshold Current vs. Shield Distance
10 Black Shield Black Shield d 0
Fig. 4 Normalized Threshold Current vs. Supply Voltage
1.6
IF(ON) - Normalized Threshold Current
IF - Normalized Threshold Current
1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0
+ E
D +
d 0
Normalized to: Turn ON Threshold VCC = 5 V TA = 25C IF (ON)
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
0
2
4
6
8
10
12
14
16
d - Distance (mm)
VCC - Supply Voltage (V)
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OPTOLOGIC(R) OPTICAL INTERRUPTER SWITCH H21LTB H21LTI H21LOB H21LOI
Fig. 5 Normalized Threshold Current vs. Ambient Temperature
1.8 Normalized to: VCC = 5 V TA = 25C 100
Fig. 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)
TA = 25C 80 IF (OFF) IF (ON)
IF - Forward Current (mA)
60
40
20
20
40
60
80
100
0 1.0
1.1
1.2
1.3
1.4
1.5
1.6
TA - Ambient Temperature (C)
VF - Forward Voltage (V)
Fig. 7 Low Output Voltage vs. Output Current
1 VCC = 5 V TA = 25C IF = 10 mA 5 VCC = 5 V RL = 270 4
Fig. 8 Response Time vs. Forward Current
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)
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OPTOLOGIC(R) OPTICAL INTERRUPTER SWITCH H21LTB H21LTI H21LOB H21LOI
Fig. 9 Switching Speed Test Circuit
Fig. 10 Typical Operating Circuit VCC 5V R IN
C2 RL
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 -
VO
.1 uf bypass
GND C 1 and C2 include probe and stray wire capacitance
Fig. 11 Switching Times Definition for Buffers
Fig. 12 Switching Times Definition for Inverters
50%
50%
0 mA
0 mA
t PLH VOH
t PHL
t PHL VOH
t PLH
Output VO
90%
10% 50%
10% Output VO
90%
90% VOL 10% 90% VOL
10%
tr
tf
tf
tr
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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 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.
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