hdlx-1414 series four character smart alphanumeric displays data sheet esd warning: standard cmos handling precautions should be observed with the hdlx-1414. description these are 3.7 mm (0.145 inch) four character 5 x 7 dot matrix displays driven by an on-board cmos ic. these displays are pin for pin compatible with the hpdl-1414. the ic stores and decodes 7-bit ascii data and displays it in an easy to read 5 x 7 font. multiplexing and led drive circuitry is also included in the display, and fast setup and hold times allow it to interface easily with common microprocessors. the address and data inputs can be directly connected to microprocessor address and data buses. the hdlx-1414 off ers a larger character set than the hpdl-1414. lower case letters and special symbols are now off ered, made possible by the 5 x 7 dot matrix character layout. the diff erence between the sunlight viewable hdls-1414 and the low power hdlu-1414 lies in the brightness level. the sunlight viewable version is internally set to provide high intensity characters. the low power version uses the same bright led technology, but reduces the current through each led to a much lower level, and maintains an intensity comparable to the HDLO-1414. devices algaas red high effi ciency red orange yellow green hdls-1414 (sun. view.) HDLO-1414 hdla-1414 hdly-1414 hdlg-1414 hdlu-1414 (low power) features ? dot matrix replacement of hpdl-1414 ? smart alphanumeric display built-in ram, ascii decoder, and led drive circuitry ? 128 ascii character set ? end stackable ? categorized for luminous intensity; yellow and green categorized for color ? low power and sunlight viewable algaas versions ? wide viewing angle (50 typical)
2 absolute maximum ratings parameter symbol min. typ. max. units supply voltage, v dd to ground [1] C0.5 7.0 v input voltage, any pin to ground C0.5 +0.5 v to v dd free air operating temperature range t a C40 +85 c storage temperature t s C40 +100 c cmos ic junction temperature +150 c relative humidity (noncondensing) at +65c 85% soldering temperature, [1.59 mm (0.063 in.) below body] solder dipping 260c for 5 secs wave soldering 250c for 3 secs esd classifi cation, r = 1.5 k ? , c = 100 pf class 1 (0 C 1999 v) note: 1. maximum voltage is with no leds illuminated. package dimensions 17.66 (0.695) 4.45 (0.175) 20.12 (0.792) 9.14 (0.360) 0.51 0.13 (0.020 0.005) typ. 6.10 (0.240) 2.54 (0.100) typ. 15.30 (0.600) 0.25 0.13 (0.010 0.005) typ. dimensions are in millimeters (inches). pin 1 identifier 4.10 (0.160) hdlx-1414 yyww x z part number luminous intensity color bin [3] date code (year, week) 0.39 (0.015) typ. (2x) pin 1 typ. pin no. function pin no. function 1 2 3 4 5 6 7 8 9 10 11 12 ground d 0 data input d 1 data input d 2 data input d 3 data input d 6 data input d 5 data input d 4 data input wr write a 1 digit select a 0 digit select v dd
3 character set ascii code d0 d1 d2 d3 hex 0 0 0 0 0 d6 d5 d4 1 0 0 0 1 0 1 0 0 2 1 1 0 0 3 0 0 1 0 4 1 0 1 0 5 0 1 1 0 6 1 1 1 0 7 0 0 0 1 8 1 0 0 1 9 0 1 0 1 a 1 1 0 1 b 0 0 1 1 c 1 0 1 1 d 0 1 1 1 e 1 1 1 1 f 000 0 001 1 010 2 011 3 100 4 101 5 110 6 111 7 notes: 1 = high level 0 = low level
4 recommended operating conditions parameter symbol min. typ. max. units supply voltage v dd 4.5 5.0 5.5 v electrical/optical characteristics over operating temperature range 4.5 < v dd < 5.5 v (unless otherwise specifi ed) ?-25c [1] parameter symbol min. typ. max. max. units test conditions blank current i dd (blnk) 1.0 4.0 ma all digits blanked input current i i C40 10 ? a v in = 0 v to v dd v dd = 5.0 v input voltage high v ih 2.0 v dd v input voltage low v il gnd 0.8 v i dd 4 digits i dd (#) 110 130 160 ma # on in all four locations 20 dots/character [2,3] notes: 1. v dd = 5.0 v. 2. average i dd measured at full brightness. peak i dd = 28/15 x average i dd (#). 3. i dd (#) max. = 130 ma, 150c ic junction temperature and v dd = 5.5 v. optical characteristics at 25c [1] vdd = 5.0 v at full brightness algaas red hdls-1414 parameter symbol min. typ. units test conditions average luminous intensity per digit, i v 4.0 12.7 mcd * illuminated in all four digits. character average 19 dots on per digit. peak wavelength ? peak 645 nm dominant wavelength [2] ? d 637 nm algaas red hdlu-1414 parameter symbol min. typ. units test conditions average luminous intensity per digit, i v 1.2 3.1 mcd * illuminated in all four digits. character average 19 dots on per digit. peak wavelength ? peak 645 nm dominant wavelength [2] ? d 637 nm
5 high effi ciency red HDLO-1414 parameter symbol min. typ. units test conditions average luminous intensity per digit, i v 1.2 3.5 mcd * illuminated in all four digits. character average 19 dots on per digit. peak wavelength ? peak 635 nm dominant wavelength [2] ? d 626 nm orange hdla-1414 parameter symbol min. typ. units test conditions average luminous intensity per digit, i v 1.2 3.5 mcd * illuminated in all four digits. character average 19 dots on per digit. peak wavelength ? peak 600 nm dominant wavelength [2] ? d 602 nm yellow hdly-1414 parameter symbol min. typ. units test conditions average luminous intensity per digit, i v 1.2 3.7 mcd * illuminated in all four digits. character average 19 dots on per digit. peak wavelength ? peak 583 nm dominant wavelength [2] ? d 585 nm green hdlg-1414 parameter symbol min. typ. units test conditions average luminous intensity per digit, i v 1.2 5.6 mcd * illuminated in all four digits. character average 19 dots on per digit. peak wavelength ? peak 568 nm dominant wavelength [2] ? d 574 nm notes: 1. refers to the initial case temperature of the device immediately prior to the light measurement. 2. dominant wavelength, ? d , is derived from the cie chromaticity diagram, and represents the single wavelength which defi nes the color of the device.
6 ac timing characteristics over operating temperature range at v dd = 4.5 v parameter symbol min. units address setup t as 10 ns address hold t ah 40 ns data setup t ds 50 ns data hold t dh 40 ns write time t w 75 ns enlarged character font timing diagram t as t w t ah 2.0 v 0.8 v 2.0 v 0.8 v 2.0 v 0.8 v t ds t dh a 0 ? a 1 wr d 0 ? d 6 0.51 (0.020) typ. 3.61 (0.142) typ. 0.56 (0.022) typ. 0.25 (0.010) typ. 2.29 (0.090) typ. notes: 1. unless otherwise specified, the tolerance on all dimensions is 0.254 mm (0.010"). 2. dimensions are in millimeters (inches).
7 display internal block diagram figure 2 shows the hdlx-1414 display internal block diagram. the cmos ic consists of a 4 x 7 character ram, a 128-character ascii decoder and the refresh circuitry necessary to synchronize the decoding and driving of four 5 x 7 dot matrix characters. four 7-bit ascii words are stored in the character ram. the ic reads the ascii data and decodes it vita the 128-character ascii decoder. this decoder includes the 64-character set of the hpdl-1414, 32 lower case ascii symbols, and 32 foreign language symbols. data entry figure 1 shows a truth table for the hdlx-1414 display. address inputs a 0 and a 1 are used to select the digit location in the display. when a 0 and a 1 are both logic low, data is loaded into the right most character. data inputs d 0 Cd 6 are used to load information into the display. data is latched into the given character address on the rising edge of the \wr signal. data and address inputs must be held stable during the write cycle to ensure that correct data is stored in the display. mechanical and electrical considerations the hdlx-1414 is a 12-pin dip package that can be stacked to create a character array of any size. the display is designed to operate reliably in C40?c to +85?c ambient temperatures. electrical description pin function description \write (\wr, pin 3) wr must be logic 0 to store data in the display. address inputs a 0 and a 1 select a specifi c location in the display memory. address 00 accesses the far right (a 1 and a 0 , pins 4 and 5) character, and address 11 accesses the far left position. v dd (pin 6) v dd is the positive power supply input. ground (gnd, pin 7) ground is the display ground. data inputs d0Cd6 are used to specify the input data for the display. (d0Cd6, pins 1, 2, 8-12) the hdlx-1414 is assembled by die attaching and wire bonding 140 leds and a cmos ic to a high tempera- ture printed circuit board. a polycarbonate lens is placed over the pc board, creating a protective air gap over the led wire bonds. backfi ll epoxy environmentally seals the display package. this package construction makes the display highly tolerant to temperature cycling and allows wave soldering. esd and latchup protection the inputs to the cmos ic are protected against static discharge and input current latchup. however, for best results, standard cmos handling precautions should be used. prior to use, the hdlx-1414 should be stored in antistatic tubes or conductive material. during assembly a grounded conductive work area should be used, and assembly personnel should wear conductive wrist straps. lab coats made of synthetic material should be avoided since they are prone to static charge build-up. input current latchup can be caused when the cmos inputs are subjected either to a voltage below ground (v in < ground) or higher than v dd (v in > v dd ) and when a high current is forced into the input. to prevent input current latchup and esd damage, unused inputs should be connected either to ground or to v dd . voltages should not be applied to the inputs until v dd has been turned on, and high transient input voltages should be eliminated. \wr a1 a0 d6 d5 d4 d3 d2 d1 d0 function 1 x x x x x x x x x no change 0 0 0 digit 0 ascii data (right most character) 0 0 1 digit 1 ascii data 0 1 0 digit 2 ascii data 0 1 1 digit 3 ascii data (left most character) 0 = logic 0; 1 = logic 1; x = do not care. figure 1. display truth table. write to character ram
8 figure 2. display internal block diagram. soldering instructions the hdlx-1414 is compatible with hand- and wave-solder processes. the use of a no-clean fl ux is recommended. the polycarbonate lens on these displays is incompatible with some fl uxes and cleaning solutions. it is not rec- ommended for use with heated terpene, or solutions of propylene glycol monomethyl ether and monoetha- nolamine. for further information on soldering and post-solder cleaning, see application note 1027, soldering led components . contrast enhancement the objective of contrast enhancement is to provide good readability in the end users ambient lighting conditions. by using both luminance (brightness) and chrominance (color) contrast techniques, the on dots of the display can be made to stand out against a dark background. for further information on contrast enhancement, see application note 1015, contrast enhancement techniques for led displays . character ram ascii decoder write address a 0 ? a 1 2 d 0 ? d 6 7 data in data out 7 character select column data 5 3 row select osc + 32 + 7 row drivers display column drivers row select write (4 x 7) wr
for product information and a complete list of distributors, please go to our web site: www.avagotech.com avago, avago technologies, and the a logo are trademarks of avago technologies in the united states and other countries. data subject to change. copyright ? 2005-2012 avago technologies. all rights reserved. obsoletes 5989-3191en av02-3611en - june 12, 2012 intensity bin limits for hdls-1414 intensity range (mcd) bin min. max. e 3.97 6.79 f 5.55 9.50 g 7.78 13.30 h 10.88 18.62 i 15.24 26.07 j 21.33 36.49 note: test conditions as specifi ed in optical characteristic table. color bin limits color range (nm) color bin min. max. green 1 576.0 580.0 2 573.0 577.0 3 570.0 574.0 4 567.0 571.5 yellow 3 581.5 585.0 4 584.0 587.5 5 586.5 590.0 6 589.0 592.5 note: test conditions as specifi ed in optical characteristic table. intensity bin limits for hdlx-1414 intensity range (mcd) bin min. max. a 1.20 1.77 b 1.45 2.47 c 2.02 3.46 d 2.83 4.85 e 3.97 6.79 f 5.55 9.50 g 7.78 13.30 note: test conditions as specifi ed in optical characteristic table.
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