HDSP-253 HP [Agilent(Hewlett-Packard)], HDSP-253 Datasheet
HDSP-253
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HDSP-253 Summary of contents
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... RAM. Seven brightness levels provide versatility in Yellow Green HDSP-2533 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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... 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. ...
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... 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. ...
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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 ...
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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 ...
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Write Cycle Timing Diagram INPUT PULSE LEVELS: 0 2.4 V Read Cycle Timing Diagram 6 ...
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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 ...
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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 ...
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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 ...
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... 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 ...
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... 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 ...
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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 ...
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... 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 ...