
QSE156/C, QSE157/C, QSE158/C, QSE159/C Plastic Silicon OPTOLOGIC® Photosensor
August 2012
©2004 Fairchild Semiconductor Corporation www.fairchildsemi.com
QSE156/C, QSE157/C, QSE158/C, QSE159/C Rev. 1.0.2
QSE156, QSE157, QSE158, QSE159
QSE156C, QSE157C, QSE158C, QSE159C
Plastic Silicon OPTOLOGIC
®
Photosensor
Features
■
Bipolar silicon IC
■
Package type: Sidelooker
■
Medium wide reception angle, 50°
■
Package material and color: black epoxy
■
Also available in clear package: “C” suffix
■
Matched emitter: QEE113/QEE123
■
Daylight filter
■
High sensitivity
■
Direct TTL/LSTTL interface
Description
The QSE15X family are OPTOLOGIC® ICs which
feature a Schmitt trigger at output which provides hyster-
esis for noise immunity and pulse shaping. The basic
building block of this IC consists of a photodiode, a linear
amplifier, voltage regulator, Schmitt trigger and four out-
put options. The TTL/LSTTL compatible output can drive
up to ten TTL loads over supply currents from 4.5 to 16.0
Volts. The devices are marked with a color stripe for
easy identification.
Package Dimensions
4.39
4.49
2.49
2.59
2.49
2.59
0.63
0.89
0.32
NOM
0.51 SQ. NOM
GND VccVout
2.17
2.27
5.03
5.13
2.54
3.56
3.76
3.86
12.7
MIN
ø2.41
ø1.65
1.9 NOM 2X
Note:
1. Dimensions for all drawings are in millimeters.
Part Number Definitions Color Code
QSE156/C Totem-Pole, buffer output Red
QSE157/C Totem-Pole, inverter output Yellow
QSE158/C Open-collector, buffer output Green
QSE159/C Open-collector, inverter output Blue
Input/Output Table
Part Number Light Output
QSE156/C On HIGH
Off LOW
QSE157/C On LOW
Off HIGH
QSE158/C On HIGH
Off LOW
QSE159/C On LOW
Off HIGH