HDSP2000LP Datasheet, PDF (2/7 Pages) Infineon Technologies AG – 0.150 4-Character 5 x 7 Dot Matrix Serial Input Alphanumeric Display

DESCRIPTION (continued)
The TTL compatible V_B input may either be tied to V_CC for max-
imum display intensity or pulse width modulated to achieve
intensity control and reduce power consumption.
In the normal mode of operation, input data for digit four, column
one is loaded into the seven on-board shift register locations one
through seven. Column one data for digits 3, 2, and 1 is shifted
into the display shift register locations. Then column one input is
enabled for an appropriate period of time, T. A similar process is
repeated for columns 2, 3, 4, and 5. If the decode time and load
data time into the shift register is t, then with five columns, each
column of the display is operating at a duty factor of:
DF = ---------^T----------
5 (T + t )
T+t, allotted to each display column, is generally chosen to
provide the maximum duty factor consistent with the mini-
mum refresh rate necessary to achieve a flicker free display.
For most strobed display systems, each column of the display
should be refreshed (turned on) at a minimum rate of 100
times per second.
With columns to be addressed, this refresh rate then gives a value
for the time T+t of: 1⁄ [5 x (100)] =2.0 msec. If the device is oper-
ated at 5.0 MHz clock rate maximum, it is possible to maintain t<T.
For short display strings, the duty factor will then approach 20%.
Maximum Ratings
Supply Voltage V_CC to GND .............................. –0.5 V to +7.0 V
Inputs, Data Out and V_B .............................–0.5 V to V_CC +0.5 V
Column Input Voltage, V_COL ............................. –0.5 V to +6.0 V
Operating Temperature Range .......................... –40°C to +85°C
Storage Temperature Range............................ –40°C to +100°C
Maximum Solder Temperature 0.063" (1.59 mm)
below Seating Plane, t<5.0 s......................................... 260°C
Maximum Allowable Power Dissipation
at T_A=25°C ⁽¹⁾ ...............................................................0.86 W
Note:
1) _{Maximum allowable dissipation is derived from VCC=5.25 V,}
V_B=2.4 V, V_COL=3.5 V, 20 LEDs on per character, 20% DF.
Figure 1. Timing Characteristics
CLOCK ^{VIH 2.0 V}
V_IL ^{0.8 V}
V_IH
DATA IN
2.0 V
V_IL 0.8 V
l/f_CLOCK
TWH
TTHL
TWL
TSETUP
THOLD
DATA OUT
TPLH, TPHL
V_IH
V_B
2.0 V
V_IL 0.8 V
ON (illuminated)
90%
DISPLAY
OFF (not illuminated) ^10%
TOFF
2.4 V ^VOH
0.4 V _VOL
TON
Figure 2. Maximum Allowable Power Dissipation
vs. Temperature
1.0
0.8
Socket Thermal
0.6
Resistance
0°C/W
0.4
10°C/W
20°C/W
40°C/W
0.2
Tj(Max) = 100°C
0.0
-60 -40 -20 0 20 40 60 80 100 120
Tamb - Ambient Temperature - °C
AC Electrical Characteristics
(V_CC=4.75 to 5.25 V, T_A=–40°C to 85°C)
Symbol
Description Min. Max.⁽¹⁾ Units Fig.
T_SETUP
T_HOLD
T_WL
Setup Time 50 —
Hold Time
25 —
Clock Width 75 —
Low
ns
1
ns
1
ns
1
T_WH
Clock Width 75 —
ns
1
High
F_(CLK)
Clock
0
5.0
Frequency
MHz 1
T_THL, T_TLH Clock Transi- — 200
ns
1
tion Time
T_PHL, T_PLH Propagation — 125
ns
1
Delay Clock to
Data Out
Note:
1) _{VB Pulse Width Modulation Frequency—50 kHz (max).}
Cleaning the Displays
IMPORTANT—Do not use cleaning agents containing alcohol
of any type with this display. The least offensive cleaning solu-
tion is hot D.l. water (60°C) for less than 15 minutes. Addition
of mild saponifiers is acceptable. Do not use commercial dish-
washer detergents.
For post solder cleaning use water or non-alcohol mixtures
formulated for vapor cleaning processing or non-alcohol mix-
tures formulated for room temperature cleaning. Nonalcohol
vapor cleaning processing for up to two minutes in vapors at
boiling is permissible. For suggested solvents refer to App-
note 19 at www.infineon.com/opto.
 2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
OSRAM Opto Semiconductors GmbH & Co. OHG • Regensburg, Germany
www.osram-os.com • [phone]
2
HDSP200LP/1LP/2LP/3LP
April 4, 2000-11