HDSP-253X HP [Agilent(Hewlett-Packard)], HDSP-253X Datasheet

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HDSP-253X

Manufacturer Part Number
HDSP-253X
Description
Eight Character 5 mm Smart Alphanumeric Display
Manufacturer
HP [Agilent(Hewlett-Packard)]
Datasheet
Eight Character 5 mm Smart
Alphanumeric Display
Technical Data
Features
• XY Stackable
• 128 Character ASCII
• Programmable Functions
• 16 User Definable
• Multi-Level Dimming and
• TTL Compatible CMOS IC
• Wave Solderable
Applications
• Avionics
• Computer Peripherals
• Industrial Instrumentation
• Medical Equipment
• Portable Data Entry
• Telecommunications
• Test Equipment
Device Selection Guide
AlGaAs Red
Decoder
Characters
Blanking
Devices
HDSP-2534
HDSP-2532 HDSP-2530 HDSP-2531
HER
Orange
Description
The HDSP-253x is ideal for
applications where displaying
eight or more characters of dot
matrix information in an
aesthetically pleasing manner is
required. These devices are eight-
digit, 5 x 7 dot matrix, alphanu-
meric displays. The 5.0 mm (0.2
inch) high characters are pack-
aged in a 0.300 mm (7.62 inch)
30 pin DIP. The on-board CMOS
IC has the ability to decode 128
ASCII characters, which are
permanently stored in ROM. In
addition, 16 programmable
symbols may be stored in on-
board RAM. Seven brightness
levels provide versatility in
Yellow
HDSP-2533
Green
HDSP-253x Series
adjusting the display intensity
and power consumption. The
HDSP-253x is designed for stan-
dard microprocessor interface
techniques. The display and
special features are accessed
through a bidirectional eight-bit
data bus.

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HDSP-253X Summary of contents

Page 1

... Device Selection Guide AlGaAs Red HER Orange HDSP-2534 HDSP-2532 HDSP-2530 HDSP-2531 Description The HDSP-253x is ideal for applications where displaying eight or more characters of dot matrix information in an aesthetically pleasing manner is required. These devices are eight- digit dot matrix, alphanu- meric displays. The 5.0 mm (0.2 inch) high characters are pack- aged ...

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... MAX. 2.68 (0.105) SYM. 4.57 TYP (0.180) 2.54 (0.100) TYP. PIN # 1 IDENTIFIER PART NUMBER [4] HDSP-253X YYWW PIN # 1 10.16 2.54 ± 0.13 (0.400) TYP. (0.100 ± 0.005) (TOL. NON ACCUM.) NOTES: 1. DIMENSIONS ARE IN MM (INCHES). 2. UNLESS OTHERWISE SPECIFIED, TOLERANCE ON DIMENSIONS IS ± 0.25 MM (0.010 IN.). 3. FOR YELLOW AND GREEN DISPLAYS ONLY. ...

Page 3

... High Eff. Red HDSP-2532 Orange HDSP-2530 Yellow HDSP-2531 Green HDSP-2533 Notes: 1. Refers to the initial case temperature of the device immediately prior to measurement. 2. Dominant wavelength derived from the CIE chromaticity diagram, and represents the single wavelength which defines the color d of the device. ...

Page 4

Recommended Operating Conditions Parameter Symbol Supply Voltage V DD Electrical Characteristics over Operating Temperature Range 4.5 < V < 5.5 unless otherwise specified DD Parameter Symbol Input Leakage (Input without pull-up) Input Current (Input with pull-up) I Blank I DD ...

Page 5

AC Timing Characteristics over Temperature Range V = 4.5 to 5.5 V unless otherwise specified. DD Reference Number Symbol 1 t Display Access Time ACC 2 t Address Setup Time to Chip Enable ACS 3 t Chip Enable Active Time ...

Page 6

Write Cycle Timing Diagram INPUT PULSE LEVELS: 0 2.4 V Read Cycle Timing Diagram 6 ...

Page 7

Electrical Description Pin Function Description RESET (RST, pin 1) Reset initializes the display. FLASH (FL, pin 2) FL low indicates an access to the Flash RAM and is unaffected by the state of address lines A ADDRESS INPUTS Each location ...

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8 ...

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... Display Internal Block Diagram Figure 1 shows the internal block diagram of the HDSP-253X display. The CMOS IC consists byte Character RAM bit Character RAM Flash RAM User-Defined Character RAM (UDC RAM) User-Defined Character Address Register (UDC Address Register) Control Word Register ...

Page 10

UDC RAM and UDC Address Register Figure 3 shows the logic levels needed to access the UDC RAM and the UDC Address Register. The UDC Address Register is eight bits wide. The lower four bits ( are used ...

Page 11

Figure 5. Logic Levels to Access the Flash RAM. Control Word Register Figure 6 shows how to access the Control Word Register. This is an eight bit register which performs five functions. They are Brightness control, Flash RAM control, Blinking, ...

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... Flashing and Blinking functions. Mechanical Considerations The HDSP-253X is assembled by die attaching and wire bonding 280 LED chips and a CMOS thermally conductive printed circuit board. A polycarbonate lens placed over the pcb creates an air gap over the LED wire bonds ...

Page 13

... Figure 8. Proper Method to Manually Insert a Display. Figure 9. Improper Method to Manually Insert a Display. Thermal Considerations The HDSP-253X can operate from - +85 C. The display’s low thermal resistance allows heat to flow from the CMOS IC to the 24 package pins. Typically, this heat is conducted through the printed circuit board traces to free air ...

Page 14

... N is the number of characters illuminated. Operation in high temperature ambients may require power derating or heatsinking. Figure 10 shows how to derate the power for an HDSP-253X. You can reduce the power by tighter supply voltage regulation or lowering the brightness level. Table 3 shows the calculated maximum allowable ambient temperature for several different sets of operating conditions ...

Page 15

Table 3. Maximum Allowable Ambient Temperature for Various Operating Conditions (cont’d.) All Colors Except AlGaAs Red Number of Character Characters # (20 dots (20 dots (20 dots (20 dots (20 dots) 6 ...

Page 16

... Intensity Bin Limits for HDSP-2534 Intensity Range (mcd) Bin Min. I 5.12 J 7.68 K 11.52 L 17.27 M 25.91 Note: Test conditions as specified in Optical Characteristic table. Intensity Bin Limits for HDSP-253x Intensity Range (mcd) Bin Min. G 2.50 H 3.41 I 5.12 J 7.68 K 11.52 Note: Test conditions as specified in Optical Characteristic table. Color Bin Limits ...

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