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PDF HCMS-2975 Data sheet ( Hoja de datos )
| Número de pieza | HCMS-2975 | |
| Descripción | High Performance CMOS 5 x 7 Alphanumeric Displays | |
| Fabricantes | Agilent | |
| Logotipo |  |
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High Performance CMOS 5 x 7
Alphanumeric Displays
Technical Data
HCMS-29xx Series
Features
• Easy to Use
• Interfaces Directly with
Microprocessors
• 0.15" Character Height in 4,
8, and 16 (2x8) Character
Packages
• 0.20" Character Height in 4
and 8 Character Packages
• Rugged X- and Y-Stackable
Package
• Serial Input
• Convenient Brightness
Controls
• Wave Solderable
• Offered in Five Colors
• Low Power CMOS
Technology
• TTL Compatible
Description
The HCMS-29xx series are high
performance, easy to use dot
matrix displays driven by on-board
CMOS ICs. Each display can be
directly interfaced with a
microprocessor, thus eliminating
the need for cumbersome interface
components. The serial IC
interface allows higher character
count information displays with a
minimum of data lines. A variety of
colors, font heights, and character
counts gives designers a wide
range of product choices for their
specific applications and the easy
to read 5 x 7 pixel format allows
the display of uppercase, lower
case, Katakana, and custom user-
defined characters. These displays
are stackable in the x- and y-
directions, making them ideal for
high character count displays.
Applications
• Telecommunications
Equipment
• Portable Data Entry Devices
• Computer Peripherals
• Medical Equipment
• Test Equipment
• Business Machines
• Avionics
• Industrial Controls
Device Selection Guide
Description
AlGaAs
HCMS-
1 x 4 0.15" Character
2905
1 x 8 0.15" Character
2915
2 x 8 0.15" Character
2925
1 x 4 0.20" Character
2965
1 x 8 0.20" Character
2975
HER
HCMS-
2902
2912
2922
2962
2972
Orange
HCMS-
2904
2914
2924
2964
2974
Yellow
HCMS-
2901
2911
2921
2961
2971
Green
HCMS-
2903
2913
2923
2963
2973
Package
Drawing
A
B
C
D
E
ESD WARNING: STANDARD CMOS HANDLING PRECAUTIONS SHOULD BE OBSERVED TO
AVOID STATIC DISCHARGE.
1 page  
5
Electrical Characteristics Over Operating Temperature Range (-40°C to +85°C)
Parameter
Input Leakage Current
HCMS-290X/296X (4 char)
HCMS-291X/297X (8 char)
HCMS-292X (16 char)
ILOGIC OPERATING
HCMS-290X/296X (4 char)
HCMS-291X/297X (8 char)
HCMS-292X (16 char)
ILOGIC SLEEP[1]
HCMS-290X/296X (4 char)
HCMS-291X/297X (8 char)
HCMS-292X (16 char)
ILED BLANK
HMCS-290X/296X (4 char)
HCMS-291X/297X (8 char)
HCMS-292X (16 char)
ILED SLEEP[1]
HCMS-290X/296X (4 char)
HCMS 291X/297X (8 char)
HCMS-292X (16 char)
Peak Pixel Current[2]
HCMS-29X5 (AlGaAs)
HCMS-29XX (Other Colors)
Symbol
II
ILOGIC(OPT)
ILOGIC(SLP)
ILED(BL)
ILED(SLP)
IPIXEL
HIGH level input voltage
Vih
TA = 25°C
VLOGIC = 5.0 V
Typ.
Max.
+7.5
+15
+15
0.4 2.5
0.8 5
0.8 5
5 15
10 30
10 30
2.0 4
4.0 8
4.0 8
13
26
26
15.4
14.0
17.1
15.9
-40°C < TA < 85°C
3.0 V < VLOGIC < 5.5 V
Min.
Max.
-2.5 +50
-5.0 +100
-5.0 +100
Units
µA
mA
5
10
10
µA
25
50
50
mA
4.0
8
8
µA
50
100
100
18.7
17.1
mA
mA
2.0
0.8 VLOGIC
V
V
Test Conditions
VIN = 0 V to VLOGIC
VIN = VLOGIC
VIN = VLOGIC
BL = 0 V
VLED = 5.5 V
All pixels ON,
Average value per
pixel
4.5 V < VLOGIC < 5.5 V
3.0 V < VLOGIC < 4.5 V
LOW level input voltage
HIGH level output voltage
LOW level output voltage
Thermal Resistance
Vil
Voh
Vol
RθJ-P
70
0.8
0.2 VLOGIC
2.0
0.8 VLOGIC
0.4
0.2 VLOGIC
V
V
V
V
V
V
°C/W
4.5 V < VLOGIC < 5.5 V
3.0 V < VLOGIC < 4.5 V
VLOGIC = 4.5 V,
Ioh = -40 µA
3.0 V < VLOGIC < 4.5 V
VLOGIC = 5.5 V,
Iol = 1.6 mA[3]
3.0 V < VLOGIC < 4.5 V
IC junction to pin
Notes:
1. In SLEEP mode, the internal oscillator and reference current for LED drivers are off.
2. Average peak pixel current is measured at the maximum drive current set by Control Register 0. Individual pixels may exceed this
value.
3. For the Oscillator Output, Iol = 40 µA.
5 Page 
11
Sleep mode (Control Word 0, bit
D6 = Low) turns off the Internal
Display Oscillator and the LED
pixel drivers. This mode is used
when the IC needs to be powered
up, but does not need to be
active. Current draw in sleep
mode is nearly zero. Data in the
Dot Register and Control Words
are retained during sleep mode.
Control Word 1
Loading the Control Register with
D7 = logic high selects Control
Word 1. This Control Word
performs two functions: serial/
simultaneous data out mode and
external oscillator prescale select
(see Table 2).
Serial/Simultaneous Data
Output D0
Bit D0 of control word 1 is used to
switch the mode of DOUT between
serial and simultaneous data entry
during Control Register writes.
The default mode (logic low) is
the serial DOUT mode. In serial
mode, DOUT is connected to the
last bit (D7) of the Control Shift
Register.
Storing a logic high to bit D0
changes DOUT to simultaneous
mode which affects the Control
Register only. In simultaneous
mode, DOUT is logically connected
to DIN. This arrangement allows
multiple ICs to have their Control
Registers written to simul-
taneously. For example, for N ICs
in the serial mode, N * 8 clock
pulses are needed to load the
same data in all Control Registers.
In the simultaneous mode, N ICs
only need 8 clock pulses to load
the same data in all Control
Registers. The propagation delay
from the first IC to the last is
N * tDOUTP.
External Oscillator
Prescaler Bit D1
Bit D1 of Control Word 1 is used
to scale the frequency of an
external Display Oscillator. When
this bit is logic low, the external
Display Oscillator directly sets the
internal display clock rate. When
this bit is a logic high, the
external oscillator is divided by 8.
This scaled frequency then sets
the internal display clock rate. It
takes 512 cycles of the display
clock (or 8 x 512 = 4096 cycles
of an external clock with the
divide by 8 prescaler) to com-
pletely refresh the display once.
Using the prescaler bit allows the
designer to use a higher external
oscillator frequency without extra
circuitry.
This bit has no affect on the
internal Display Oscillator
Frequency.
Bits D2-D6
These bits must always be pro-
grammed to logic low.
Cascaded ICs
Figure 3 shows how two ICs are
connected within an HCMS-29XX
display. The first IC controls the
four left-most characters and the
second IC controls the four
right-most characters. The Dot
Registers are connected in series
to form a 320-bit dot shift
register. The location of pixel 0
has not changed. However, Dot
Shift Register bit 0 of IC2
becomes bit 160 of the 320-bit
dot shift register.
The Control Registers of the two
ICs are independent of each
other. This means that to adjust
the display brightness the same
control word must be entered into
both ICs, unless the Control
Registers are set to simultaneous
mode.
Longer character string systems
can be built by cascading multiple
displays together. This is
accomplished by creating a five
line bus. This bus consists of CE,
RS, BL, Reset, and CLK. The
display pins are connected to the
corresponding bus line. Thus, all
CE pins are connected to the CE
bus line. Similarly, bus lines for
RS, BL, Reset, and CLK are
created. Then DIN is connected to
the right-most display. DOUT from
this display is connected to the
next display. The left-most display
receives its DIN from the DOUT of
the display to its right. DOUT from
the left-most display is not used.
Each display may be set to use its
internal oscillator, or the displays
may be synchronized by setting
up one display as the master and
the others as slaves. The slaves
are set to receive their oscillator
input from the master’s oscillator
output.
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet HCMS-2975.PDF ] | |
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