August 2012
tm
QSE256, QSE257, QSE258, QSE259
Plastic Silicon OPTOLOGIC® Photosensor
Features
Description
■ Bipolar silicon IC
The QSE25x 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 type: Sidelooker
■ Medium wide reception angle, 50°
■ Package material and color: black epoxy
■ Daylight filter
■ High sensitivity
■ Direct TTL/LSTTL interface
Package Dimensions
2.15
2.35
1.39
1.65
5° TYP ON ALL SIDES
ø
1.14
1.40
4.35
5.85
0.67
0.77
12.7
MIN
Part Number Definitions
Totem-Pole, buffer output
Color Code
Red
QSE256
QSE257
QSE258
QSE259
Totem-Pole, inverter output
Open-collector, buffer output
Open-collector, inverter output
Yellow
Green
1.17
1.37
Blue
2.34
2.74
Input/Output Table
0.52
0.76
Part Number
Light
On
Output
HIGH
LOW
Vcc
GND
Vout
QSE256
QSE257
QSE258
QSE259
Off
On
LOW
Off
HIGH
HIGH
LOW
On
1.45
1.71
4.38
4.62
0.25
0.51
Off
On
LOW
Note:
Off
HIGH
1. Dimensions for all drawings are in millimeters.
©2004 Fairchild Semiconductor Corporation
www.fairchildsemi.com
QSE256, QSE257, QSE258, QSE259 Rev. 1.0.1