Manufacturer Part NumberHDSP-2534
ManufacturerAvago Technologies US Inc.
HDSP-2534 datasheet

Specifications of HDSP-2534

Display TypeAlphanumericCommon Pin*
Package / Case28-DIPColorRed
Size / Dimension1.69" x .45" (42.9mm x 11.4mm)Number Of Digits/alpha8
Digit/alpha Size0.20" (5mm)Number Of Digits8
Character Size2.54 mm x 4.57 mmIllumination ColorRed
Wavelength637 nmOperating Voltage5 V
Operating Current410 mAMaximum Operating Temperature+ 85 C
Minimum Operating Temperature- 40 CLuminous Intensity25 ucd
Viewing Area (w X H)40.06 mm x 4.57 mmLead Free Status / RoHS StatusLead free / RoHS Compliant
Other names516-1166-5  
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HDSP-253x Series
Eight Character 5 mm Smart Alphanumeric Display
Data Sheet
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, alphanumeric displays.
The 5.0 mm (0.2 inch) high characters are pack­aged in a
0.300 inch (7.62 mm) 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 adjusting the display intensity
and power consumption. The HDSP-253x is designed for
standard microprocessor interface techniques. The display
and special features are accessed through a bidirectional
eight-bit data bus.
Device Selection Guide
AlGaAs Red
ESD WARNING: Normal CMOS handling precautions should be observed to avoid static discharge.
• XY stack­able
• 128 character ASCII decoder
• Programmable functions
• 16 user definable characters
• Multi-level dimming and blank­ing
• TTL compatible CMOS IC
• Wave solderable
• Avionics
• Computer peripherals
• Industrial instrumentation
• Medical equipment
• Portable data entry devices
• Telecommunications
• Test equipment

HDSP-2534 Summary of contents

  • Page 1

    ... Device Selection Guide AlGaAs Red HER Orange HDSP-2534 HDSP-2532 HDSP-2530 ESD WARNING: Normal CMOS handling precautions should be observed to avoid static discharge. Features • XY stack­able • 128 character ASCII decoder • Programmable functions • 16 user definable characters • ...

  • Page 2

    ... MAX. 4.57 TYP (0.180) PIN #1 IDENTIFIER 2.54 TYP. (0.100) PART NUMBER [4] HDSP-253x X Z YYWW PIN #1 2.54 0.13 10.16 TYP. (0.100 0.005) (0.400) (TOL. NON ACCUM.) Notes: 1. Dimensions are in mm (inches). 2. Unless otherwise specified, tolerance on dimensions is ±0.25 mm (0.010 inch). 3. For yellow and green displays only. 4. Mark­ing is on side opposite pin 1. Absolute Maximum Ratings ...

  • Page 3

    ... A 1011 B 1100 C 1101 D 1110 E 1111 F [1] Optical Characteristics at 25° 5 Full Brightness DD LED Color Part Number AlGaAs Red HDSP-2534 High Efficiency 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 of the device ...

  • Page 4

    Recommended Operating Conditions Parameter Symbol Minimum Supply Voltage V 4.5 DD Electrical Characteristics over Operating Temperature Range 4.5 < V < 5.5 unless otherwise specified DD Parameter Symbol Input Leak­age I I (Input without Pull-up) Input Current I IP (Input with Pull-up) I Blank­ [2,3,4] ...

  • Page 5

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

  • Page 6

    Write Cycle Timing Diagram Input Pulse Levels: 0 2.4 V Read Cycle Timing Diagram Input Pulse Levels: 0 2.4 V Output Reference Levels: 0 2.2 V Output Loading = 1 TTL Load and 100 ...

  • 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 in memory has a distinct address. Address inputs ( pins 3-6, 10) location in the Character RAM, the Flash RAM or a particular row in the UDC (User Defined Character) RAM. A Table 1 shows the logic levels needed to access each section of memory. Table 1. Logic Levels ...

  • Page 8

    8 ...

  • Page 9

    ... Display Internal Block Diagram Figure 1 shows the internal block­ diagram of the HDSP- 253X display. The CMOS IC consists byte Character RAM bit Flash RAM, a 128 character ASCII decoder character UDC RAM, a UDC Address Register, a Control Character RAM Flash RAM User-Defined Character RAM (UDC RAM) User-Defined Character Address Register (UDC Address Register) Control Word Register Character Ram Figure 2 shows the logic levels needed to access the HDSP- 253X Character RAM. During a normal access the CE = “0” ...

  • 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 (D used to select one of the 16 UDC locations. The upper four bits ( are not used. Once the UDC address has been 4 7 stored in the UDC Address Register, the UDC RAM can be accessed. To completely specify character requires eight write cycles. One cycle is used to store the UDC RAM address in the UDC Address Register. Seven cycles are used to store dot data in the UDC RAM. Data is entered by rows. One ...

  • Page 11

    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, Self Test and Clear. Each function is independent of the others. However, all bits are updated during each Control Word write cycle. Brightness (Bits 0-2) Bits 0-2 of the Control Word adjust the brightness of the display. Bits 0-2 are interpreted as a three bit binary code with code (000) corresponding to maximum brightness and code (111) corresponding to a blank­ed display. In addition to ...

  • Page 12

    ... Register are unaffected. All displays which operate with the same clock­ source must be simultaneously reset to synchronize the Flashing and Blink­ing functions. Mechanical Considerations The HDSP-253X is assembled by die attaching and wire bonding 280 LED chips and a CMOS thermally con- ductive printed circuit board. A polycarbonate lens placed over the pcb creates an air gap over the LED wire bonds. A back­fill epoxy seals the display pack­age. ...

  • Page 13

    ... Figure 8. Proper method to manually insert a display. Thermal Considerations The HDSP-253X can operate from -40°C to +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. For most applications, no additional heatsink­ing is needed. Illuminating all 280 LEDs simultaneously at full brightness is not recommended for continuous operation. However, all 280 LEDs can be illuminated simultaneously at full brightness for 10 seconds at 25° ...

  • Page 14

    Table 3 shows the calculated maximum allowable ambient temperature for several different sets of operating condi- tions. The worst case alphanumeric characters (#,@,B) have 20 pixels. Displaying eight 20-pixel characters will not occur in normal operation. Thus, using eight 20-pixel characters to calculate power dissipation will over estimate the power and the IC junction temperature. The average number of pixels per character, supply voltage, brightness level, and number of characters are needed to calculate the power dissipated by the IC. The ambient temperature, power dissipated by the IC, and the thermal resistance ...

  • Page 15

    ... The logic ground should be connected to the same ground potential as the logic interface circuitry. The analog ground and the logic ground should be connected at a common ground which can withstand the current induced by the switching LED drivers. When separate ground connections Intensity Bin Limits for HDSP-2534 Intensity Range (mcd) Bin Min. I 5. ...