ISOCOM COMPONENTS LTD
Unit 25B, Park View Road West,
Park View Industrial Estate, Brenda Road
Hartlepool, Cleveland, TS25 1YD
Tel: (01429) 863609 Fax :(01429) 863581
7/12/00
DB92128-AAS/A3
ISO - LOGIC BUFFER SCHMITT
TRIGGER SIDE DETECTOR
IS657A
Dimensions in mm
Voltage Regulator
2 Out
3 V
CC
1 G
ND
Amp
0.8
2.0
1.5
0.4
0.2
3.0
1.27
4
4
8
8
4.0
1.5
1.5
R 0.9
7.0
1.27
17.0
18.0
4.0
1.27
0.3
0.45
0.6
2.5
1.27
1
2
3
DESCRIPTION
The IS657A is an optically integrated
circuit detector with schmitt trigger buffer
output. It is mounted in a clear plastic lateral
side looking package which enables these
devices to display superior mechanical
resolutions, coupled characteristics and
reliability in a low cost housing.
FEATURES
l
Built-in Schmitt trigger circuit
l
High level output at incident light
l
Pull up resistor between V
CC
and output
l
Lateral Side Looking Plastic Package
l
High Sensitivity (E
V
= 35 lx at 25C)
l
LSTTL and TTL Compatible output
l
Supply voltage V
CC
-0.5 to +17 volts
APPLICATIONS
l
Floppy disk drives
l
Copiers, Printers,Facsimilies
l
VCR's, Cassette tape recorders
l
Automatic vending machines
ISOCOM INC
1024 S. Greenville Ave, Suite 240,
Allen, TX 75002 USA
Tel: (214) 495-0755 Fax: (214) 495-0901
e-mail info@isocom.com
http://www.isocom.com
DB92128-AAS/A3
7/12/00
ABSOLUTE MAXIMUM RATINGS (25C unless
otherwise specified)
Storage Temperature
-40C to +100C
Operating Temperature
-25C to +85C
Lead Soldering Temperature
260C
(5 secs maximum)
Power Dissipation
250 mW
Output Current
50mA
Allowed Range V
31
0 to 17V
PARAMETER
MIN TYP MAX UNITS
TEST CONDITIONS
High Level Output Voltage
V
OH
3.5
V
E
V
= 50 lx
Low Level Output Voltage
V
OL
0.4
V
I
OL
= 16mA, E
V
= 0 lx
Supply Current
I
CCL
4.5
mA
E
V
= 0 lx
I
CCH
3
mA
E
V
= 50 lx
High to Low Threshhold Illumination E
VHL
1.5
10
lx
T
A
= 25C, R
L
= 280
1
lx
R
L
= 280
Low to High Threshhold Illumination E
VLH
15
35
lx
T
A
= 25C, R
L
= 280
50
lx
R
L
= 280
Hysteresis
E
VHL
0.50
0.65
0.90
T
A
= 25C, R
L
= 280
E
VLH
High to Low Propagation Time
t
PHL
5
15
s
T
A
= 25C, E
V
= 50 lx
Low to High Propagation Time
t
PLH
3
9
s
R
L
= 280
Rise Time
tr
0.1
0.5
s
Fall Time
tf
0.05
0.5
s
ELECTRICAL CHARACTERISTICS ( T
A
= 0C to 70C, V
CC
= 5V Unless otherwise noted )
DB92128-AAS/A3
7/12/00
50
-25 0 25 50 75 100 125
Ambient temperature T
A
( C )
0
300
Collector power dissipation P
C
(mW)
Collector Power Dissipation vs. Ambient Temperature
0
1.0
2.0
3.0
Ambient temperature T
A
( C )
-25 0 25 50 75 100
-25 0 25 50 75 100
Ambient temperature T
A
( C )
Low level output voltage V
OL
( V )
Low Level Output Voltage vs.
Ambient Temperature
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
1
Low level output voltage V
OL
( V )
Low Level Output Voltage vs.
Low Level Output Current
Low level output current I
OL
( mA )
0.1
0.01
0.02
0.2
0.5
Supply Current vs.
Ambient Temperature
Supply current I
CC
(mA)
V
CC
= 5V
E
VHL
= 0 lx
T
A
= 25C
0.1 0.2 0.5 1 2 5 10
0
0.1
0.2
0.3
0.4
Rise time, fall time tr, tf (
s)
Rise Time, Fall Time vs. Load
Resistance
Load resistance R
L
( k
)
0.5
Supply voltage V
CC
( V )
1.2
0.6
0.4
0.2
0
0.8
1.0
0 10 20 30 40
Relative Threshold Illuminance vs.
Supply Voltage
Relative threshold illuminance
100
150
200
250
1 10 50 100
0.05
V
CC
= 5V
E
VHL
= 50 lx
T
A
= 25C
0.6
I
CCH
I
CCL
V
CC
= 5V
E
VHL
= 0 lx
I
OL
= 30mA
5mA
16mA
tf
tr
E
VHL
E
VLH
E
VLH
= 1 at
V
CC
= 5V
T
A
= 25C
V
CC
= 17V
V
CC
= 17V
5V
5V
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