View HDLX-2416_2888322.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

four character 5.0 mm (0.2 inch) smart 5 x 7 alphanumeric displays technical data description these are 5.0 mm (0.2 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-2416. the ic stores and decodes 7 bit ascii data and displays it using a 5 x 7 font. multiplexing circuitry, and drivers are also part of the ic. the ic has fast setup and hold times which makes it easy to interface to a microprocessor. features ? enhanced drop-in replace- ment to hpdl-2416 ? smart alphanumeric display built-in ram, ascii decoder, and led drive circuitry ? cmos ic for low power consumption ? software controlled dimming levels and blank ? 128 ascii character set ? end-stackable ? categorized for luminous intensity; yellow and green categorized for color ? low power and sunlight viewable algaas versions ? wide operating temperature range -40 c to +85 c ? excellent esd protection ? wave solderable ? wide viewing angle (50 typ) devices: standard red algaas red high efficiency red orange yellow green hdlr-2416 hdls-2416 hdlo-2416 hdla-2416 hdly-2416 hdlg-2416 hdlu-2416 absolute maximum ratings supply voltage, v dd to ground [1] ..................................... -0.5 v to 7.0 v input voltage, any pin to ground .......................... -0.5 v to v dd + 0.5 v free air operating temperature range, t a ................ -40 c to +85 c storage temperature, t s ........................................ -40 c to 100 c cmos ic junction temperature, t j (ic) ................................... +150 c relative humidity (non-condensing) at 65 c ................................... 85% maximum solder temperature, 1.59 mm (0.063 in.) below seating plane, t < 5 sec. ............................... 260 c esd protection, r = 1.5 k w , c = 100 pf ............. v z = 2 kv (each pin) note: 1. maximum voltage is with no leds illuminated. HDLX-2416 series esd warning: standard cmos handling precautions should be observed with the HDLX-2416
2 the address and data inputs can be directly connected to the microprocessor address and data buses. the HDLX-2416 has several enhancements over the hpdl- 2416. these features include an expanded character set, internal 8 level dimming control, external dimming capability, and individ- ual digit blanking. finally, the extended functions can be disabled which allows the hdlx- 2416 to operate exactly like an hpdl-2416 by disabling all of the enhancements except the ex- panded character set. the difference between the sunlight viewable hdls-2416 and the low power hdlu-2416 occurs at power-on or at the default brightness level. following power up, the hdls-2416 operates at the 100% brightness level, while pin pin no. function no. function 1ce 1 chip enable 10 gnd 2ce 2 chip enable 11 d 0 data input 3 clr clear 12 d 1 data input 4 cue cursor enable 13 d 2 data input 5 cu cursor select 14 d 3 data input 6 wr write 15 d 6 data input 7a 1 address input 16 d 5 data input 8a 0 address input 17 d 4 data input 9v dd 18 bl display blank notes: 1. unless otherwise specified, the tolerance on all dimensions is 0.254 mm ( 0.010") 2. all dimensions are in mm/inches. 3. for yellow and green displays only. package dimensions the hdlu-2416 operates at the 27% brightness level. power on sets the internal brightness control (bits 3-5) in the control register to binary code (000). for the hdls-2416 binary code (000) corresponds to a 100% brightness level, and for the hdlu-2416 binary code (000) corresponds to a 27% brightness level. the other seven brightness levels are identical for both parts.
3 character set notes: 1 = high level 0 = low level
4 recommended operating conditions parameter symbol min. typ. max. unit supply voltage v dd 4.5 5.0 5.5 v electrical characteristics over operating temperature range 4.5 < v dd < 5.5 v (unless otherwise specified) all devices 25 c [1] parameter symbol min. typ. max. max. units test conditions i dd blank i dd (blnk) 1.0 4.0 ma all digits blanked input current i i -40 10 m av 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 hdlo/hdla/hdly/hdlg-2416 25 c [1] parameter symbol min. typ. max. max. units test conditions i dd 4 digits i dd (#) 110 130 160 ma "#" on in all four 20 dots/character [2, 3] locations i dd cursor all i dd (cu) 92 110 135 ma cursor on in all dots on @ 50% four locations 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 for hdlo/hdla/hdly/hdlg-2416, 146 ma for hdlr/hdls-2416, and 42 ma for hdlu-2416 at default brightness, 150 c ic junction temperature and v dd = 5.5 v. hdls/hdlu-2416 25 c [1] part number parameter symbol typ. max. max. units test conditions hdls-2416 i dd 4 digits i dd (#) 125 146 180 ma four "#" on in 20 dots/character [2,3] all four locations hdlu-2416 34 42 52 hdls-2416 i dd cursor all dots i dd (cu) 105 124 154 ma four cursors on on @ 50% in all four locations hdlu-2416 29 36 45 hdlr-2416 25 c [1] parameter symbol min. typ. max. max. units test conditions i dd 4 digits i dd (#) 125 146 180 ma "#" on in all four 20 dots/character [2,3] locations i dd cursor i dd (cu) 105 124 154 ma cursor on in all all dots on @ 50% four locations
5 optical characteristics at 25 c [1] v dd = 5.0 v at full brightness hdlr-2416 parameter symbol min. typ. units test conditions average luminous i v 0.5 1.1 mcd ''*'' illuminated in all four digits. intensity per digit, 19 dots on character average peak wavelength l peak 655 nm dominant wavelength [2] l d 640 nm hdls/hdlu-2416 part number parameter symbol min. typ. units test conditions hdls-2416 average luminous i v 4.0 12.7 mcd ''*'' illuminated in all intensity per digit, four digits, 19 dots on hdlu-2416 character average 1.2 3.1 mcd per digit. all peak wavelength l peak 645 nm dominant wavelength [2] l d 637 nm hdlo-2416 parameter symbol min. typ. units test conditions average luminous i v 1.2 3.5 mcd ''*'' illuminated in all four digits. intensity per digit, 19 dots on character average peak wavelength l peak 635 nm dominant wavelength [2] l d 626 nm hdla-2416 parameter symbol min. typ. units test conditions average luminous i v 1.2 3.5 mcd ''*'' illuminated in all four digits. intensity per digit, 19 dots on character average peak wavelength l peak 600 nm dominant wavelength [2] l d 602 nm hdly-2416 parameter symbol min. typ. units test conditions average luminous i v 1.2 3.7 mcd ''*'' illuminated in all four digits. intensity per digit, 19 dots on character average peak wavelength l peak 583 nm dominant wavelength [2] l d 585 nm
6 hdlg-2416 parameter symbol min. typ. units test conditions average luminous i v 1.2 5.6 mcd ''*'' illuminated in all four digits. intensity per digit, 19 dots on character average peak wavelength l peak 568 nm dominant wavelength [2] l d 574 nm notes: 1. refers to the initial case temperature of the device immediately prior to the light measurement. 2. dominant wavelength, l d , is derived from the cie chromaticity diagram, and represents the single wavelength which defines the color of the device. 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 chip enable setup t ces 0ns chip enable hold t ceh 0ns write time t w 75 ns clear t clr 10 m s clear disable t clrd 1 m s timing diagram enlarged character font notes: 1. unless otherwise specified the tolerance on all dimensions is 0.254 mm (0.010") 2. dimensions are in mm (inches).
7 display internal block diagram figure 1 shows the HDLX-2416 display internal block diagram. the cmos ic consists of a 4 x 7 character ram, a 2 x 4 attribute ram, a 5 bit control register, a 128 character ascii decoder and the refresh circuitry necessary to synchronize the decoding and driving of four 5 x 7 dot matrix displays. four 7 bit ascii words are stored in the character ram. the ic reads the ascii data and decodes it via the 128 character ascii decoder. the ascii decoder includes the 64 character set of the hpdl-2416, 32 lower case ascii symbols, and 32 foreign language symbols. a 5 bit word is stored in the control register. three fields within the control register provide an 8 level brightness control, master blank, and ex- tended functions disable. for each display digit location, two bits are stored in the attribute ram. one bit is used to enable a cursor character at each digit location. a second bit is used to individually disable the blanking features at each digit location. the display is blanked and dimmed through an internal blanking input on the row drivers. logic within the ic allows the user to dim the display either through the bl input or through the brightness control in the control register. similarly the display can be blanked through the bl input, the master blank in the control register, or the digit blank disable in the attribute ram. electrical description pin function description chip enable ce 1 and ce 2 must be a logic 0 to write to the (ce 1 and ce 2 , display. pins 1 and 2) clear when clr is a logic 0 the ascii ram is reset (clr, pin 3) to 20hex (space) and the control register/ attribute ram is reset to 00hex. cursor enable cue determines whether the ic displays the (cue pin 4) ascii or the cursor memory. (1 = cursor, 0 = ascii). cursor select cu determines whether data is stored in the (cu, pin 5) ascii ram or the attribute ram/control register. (1 = ascii, 0 = attribute ram/control register). write wr must be a logic 0 to store data in the (wr, pin 6) display. address a 0 -a 1 selects a specific location in the display inputs memory. address 00 accesses the far right (a 1 and a 0 , display location. address 11 accesses the far pins 8 and 7) left location. data inputs d 0 -d 6 are used to specify the input data for the (d 0 -d 6 , display. pins 11-17) v dd v dd is the positive power supply input. (pin 9) gnd gnd is the display ground. (pin 10) blanking bl is used to flash the display, blank the input display or to dim the display. (bl, pin 18)
8 figure 1. internal block diagram
9 cue bl clr ce 1 ce 2 wr cu a 1 a 0 d 6 d 5 d 4 d 3 d 2 d 1 d 0 function 011 display ascii 111 display stored cursor xx xxxx x xxx x x x xx0 reset rams blank display but do not reset x01 rams and control register extended intensity master digit digit write to attribute ram 0 0 0 functions control blank blank cursor and control register disable disable 0 0 0 = 000 = 100%* 0 = digit digit dbd n = 0, allows digit n to be 0 0 1 enable 001 = 60% display blank cursor blanked d 1 -d 5 010 = 40% on disable 1 1 011 = 27% dbd n = 1 prevents digit n x x 1 0 0 0 1 = 100 = 17% 1 = digit digit from being blanked. 0 1 0 disable 101 = 10% display blank cursor d 1 -d 5 110 = 7% blanked disable 2 2 dc n = 0 removes cursor from 111 = 3% digit n d 0 digiit digit 0 1 1 always blank cursor dc n = 1 stores cursor at enabled disable 3 3 digit n 1 0 0 digit 0 ascii data (right most character) 1 0 1 digit 1 ascii data xx1 000 write to character ram 1 1 0 digit 2 ascii data 1 1 1 digit 3 ascii data (left most character) 1x x x x 1 x 1 x x x x x x x x x x x no change xx 1 display clear data stored in the character ram, control register, and attribute ram will be cleared if the clear (clr) is held low for a minimum of 10 m s. note that the display will be cleared regardless of the state of the chip enables (ce 1 , ce 2 ). after the display is cleared, the ascii code for a space (20hex) is loaded into all character ram locations and 00hex is loaded into all attribute ram/control register memory locations. data entry figure 2 shows a truth table for the HDLX-2416 display. setting the chip enables (ce 1 , ce 2 ) to logic 0 and the cursor select (cu) to logic 1 will enable ascii data loading. when cursor select (cu) is set to logic 0, data will be loaded into the control register and attribute ram. address inputs a 0 -a 1 are used to select the digit location in the display. data inputs d 0 -d 6 are used to load information into the display. data will be latched into the display on the rising edge of the wr signal. d 0 -d 6 , a 0 -a 1 , ce 1 , ce 2 , and cu must be held stable during the write cycle to ensure that correct data is stored into the display. data can be loaded into the display in any order. note that when a 0 and a 1 are logic 0, data is stored in the right most display location. cursor when cursor enable (cue) is a logic 1, a cursor will be displayed in all digit locations where a logic 1 has been stored in the digit cursor memory in the attribute ram. the cursor consists of all 35 dots on at half brightness. a flashing cursor can be displayed by pulsing cue. when cue is a logic 0, the ascii data stored in the character ram will be dis- played regardless of the digit cursor bits. blanking blanking of the display is con- trolled through the bl input, the control register and attribute ram. the user can achieve a variety of functions by using these controls in different combinations, such as full hardware display blank, software blank, blanking of individual characters, and syn- chronized flashing of individual characters or entire display (by figure 2. display truth table 0 = logic 0; 1 = logic 1; x = do not care; * 000 = 27% for hdlu-2416
10 table 1. current requirements at different brightness levels symbol d 5 d 4 d 3 brightness 25 c typ. 25 c max. max. over temp. units i dd (#) 0 0 0 100% 110 130 160 ma 0 0 1 60% 66 79 98 ma 0 1 0 40% 45 53 66 ma 0 1 1 27% 30 37 46 ma 1 0 0 17% 20 24 31 ma 1 0 1 10% 12 15 20 ma 1 1 0 7% 9 11 15 ma 11 1 3% 4 6 9 ma efd mb dbd n bl 0 0 0 0 display blanked by bl 0 0 x 1 display on display blanked by bl. individual characters 0x 1 0 "on" based on "1" being stored in dbd n 0 1 0 x display blanked by mb display blanked by mb. individual characters 0111 "on" based on "1" being stored in dbd n 1 x x 0 display blanked by bl 1 x x 1 display on figure 3. display blanking truth table bits 3-5 in the control register provide internal brightness control. these bits are interpreted as a three bit binary code, with code (000) corresponding to the maximum brightness and code (111) to the minimum brightness. in addition to varying the display brightness, bits 3-5 also vary the average value of i dd . i dd can be specified at any brightness level as shown in table 1. strobing the blank input). all of these blanking modes affect only the output drivers, maintaining the contents and write capability of the internal rams and control register, so that normal loading of rams and control register can take place even with the display blanked. figure 3 shows how the extended function disable (bit d 6 of the control register), master blank (bit d 2 of the control register), digit blank disable (bit d 1 of the attribute ram), and bl input can be used to blank the display. when the extended function disable is a logic 1, the display can be blanked only with the bl input. when the extended function disable is a logic 0, the display can be blanked through the bl input, the master blank, and the digit blank disable. the entire display will be blanked if either the bl input is logic 0 or the master blank is logic 1, providing all digit blank disable bits are logic 0. those digits with digit blank disable bits a logic 1 will ignore both blank signals and remain on. the digit blank disable bits allow individual characters to be blanked or flashed in synchronization with the bl input. dimming dimming of the display is con- trolled through either the bl input or the control register. a pulse width modulated signal can be applied to the bl input to dim the display. a three bit word in the control register generates an internal pulse width modulated signal to dim the display. the internal dimming feature is enabled only if the extended function disable is a logic 0.
11 mechanical and electrical considerations the HDLX-2416 is an 18 pin dip package that can be stacked horizontally and vertically to create arrays of any size. the HDLX-2416 is designed to operate continuously from -40 c to + 85 c for all possible input conditions. the HDLX-2416 is assembled by die attaching and wire bonding 140 leds and a cmos ic to a high temperature printed circuit board. a polycarbonate lens is placed over the pc board creating an air gap environment for the led wire bonds. backfill epoxy environmentally seals the display package. this package construc- tion makes the display highly tolerant to temperature cycling and allows wave soldering. the inputs to the cmos ic are protected against static discharge and input current latchup. how- ever, for best results standard cmos handling precautions should be used. prior to use, the HDLX-2416 should be stored in anti-static 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 is caused when the cmos inputs are sub- jected either to a voltage below ground (v in < ground) or to a voltage 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 applied to the display. transient input voltages should be eliminated. soldering and post solder cleaning instructions for the HDLX-2416 the HDLX-2416 may be hand soldered or wave soldered with sn63 solder. when hand soldering it is recommended that an elec- tronically temperature controlled and securely grounded soldering iron be used. for best results, the iron tip temperature should be set at 315 c (600 f). for wave soldering, a rosin-based rma flux can be used. the solder wave temperature should be set at 245 c 5 c (473 f 9 f), and dwell in the wave should be set between 1 1/2 to 3 seconds for optimum soldering. the preheat temperature should not exceed 110 c (230 f) as measured on the solder side of the pc board. for further information on solder- ing and post solder cleaning, see application note 1027, soldering led components. contrast enhancement the objective of contrast enhance- ment is to provide good readabil- ity in the end users ambient lighting conditions. the concept is to employ both luminance and chrominance contrast techniques. these enhance readability by having the off-dots blend into the display background and the on- dots vividly stand out against the same background. for additional information on contrast enhance- ment, see application note 1015. figure 4 shows a circuit designed to dim the display from 98% to 2% by pulse width modulating the bl input. a logarithmic or a linear potentiometer may be used to adjust the display intensity. however, a logarithmic potenti- ometer matches the response of the human eye and therefore provides better resolution at low intensities. the circuit frequency should be designed to operate at 10 khz or higher. lower frequen- cies may cause the display to flicker. extended function disable extended function disable (bit d 6 of the control register) disables the extended blanking and dim- ming functions in the HDLX-2416. if the extended function disable is a logic 1, the internal brightness control, master blank, and digit blank disable bits are ignored. however the bl input and cursor control are still active. this allows downward compatibility to the hpdl-2416. figure 4. intensity modulation control using an astable multivibrator (reprinted with permission from electronics magazine, sept. 19, 1974, vnu business pub. inc.)
www.semiconductor.agilent.com data subject to change. copyright ? 1999 agilent technologies, inc. obsoletes 5963-7389e (4/95) 5964-6380e (11/99)

▲Up To Search▲

Price & Availability of HDLX-2416

	To Download HDLX-2416 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .