HBCC-0500 Datasheet, PDF (4/4 Pages) Agilent(Hewlett-Packard) – Low Current Bar Code Digitizer IC

Inverted Output
The standard output of the
HBCC-0500 is high when the
sensor is looking at black bars,
and low when the sensor is look-
ing at white spaces. If inverted
output is needed, add the extra
circuitry in the inverted output
block. Make sure that the 10 kΩ
pull up resistor on the normal
output transistor is loaded.
Black State Return
The HBCC-0500 normally returns
to the white state 100 millisec-
onds after the last transition. The
extra circuitry forces the black
state after a time out period set
by the 1.0 µF cap. The normal
time out period is about 1.5 sec-
onds. If a longer time is needed,
increase the values of the 1.0 µF
and the 3.3 nF caps. The ratio of
values should be no more than
300:1.
Threshold Adjustment
The standard circuit uses a
threshold designed for most bar
codes. If the bar codes to be read
consistently have narrow bars
that are lighter than the wide
bars, then the 470 kΩ and the
390 kΩ resistors attached to pin
18 should be swapped.
Warranty and Service
HP Digitizer ICs are warranted
for a period of one year after
purchase covering defects in
material and workmanship.
Hewlett-Packard will repair or, at
its option, replace products that
prove to be defective in material
or workmanship under proper
use during the warranty period.
NO OTHER WARRANTIES ARE
EXPRESSED OR IMPLIED,
INCLUDING BUT NOT LIMITED
TO THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR
PURPOSE. HEWLETT-PACKARD
IS NOT LIABLE FOR
CONSEQUENTIAL DAMAGES.
For additional warranty or service
information, please contact your
local Hewlett-Packard sales
representative or authorized
distributor.
Recommended Operating Conditions
Parameter
Scan Velocity
Edge Contrast
V_CC
Ambient Temperature
Ambient Light
Min.
7.6 (3)
40
4.5
-20
Max.
76 (30)
6.0
+65
100,000
Units
cm/sec (in/sec)
%
V
°C
Lux
Notes
1
2
3
Notes:
1. Narrow element width = 0.19 mm (0.0075 in.).
2. Contrast is defined as R_w - R_b, where R_w is the reflectance of the spaces in R_b is the
reflectance of the bars, measured at the sensor wavelength (655 or 820 nm). 100%
reflectance is barium sulfate.
3. Power supply ripple and noise should be less than 100 mV peak to peak.
Electrical Characteristics
Parameter
Symbol Typical Max. Units Notes
Supply Current, IC and Sensor I_CC
High Level Output Current
I_OH
Low Level Output Voltage
V_OL
Output Rise Time
t_r
Output Fall Time
t_f
Wake Up Time
t_w
2.7 4.0 mA
1.0 µA
0.4 V
4.5
20
µs
4
0.3
20
µs
4
50 200 ms
5
Notes:
4. Rise and fall time will be dependent upon the capacitance of the cable.
5. Wake up time is defined as the time from initial power turn on until the circuit is
digitizing bar codes within data sheet limits.
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