SCE5740 YELLOW SCE5741 HIGH EFFICIENCY RED SCE5742 GREEN SCE5743 HIGH EFFICIENCY GREEN SCE5744 ORANGE SCE5745 STANDARD RED 0.180" 4-Character 5 x 7 Dot Matrix Serial Input Dot Addressable Intelligent Display(R) Devices Dimensions in Inches (mm) 0.400 .015 (10.16 .38) 0.180 (4.57) 0.784 (19.91) ALSO AVAILABLE WITH OPTIONS (see pages 14 and 15) * SCE574xP-SIP * SCE574xQ-SIP with right angle bends FEATURES * Four 0.180" (4.57 mm) 5 x 7 Dot Matrix Characters in Red, Yellow, High Efficiency Red, Green, High Efficiency Green, Orange * Optimum Display Surface Efficiency (display area to package ratio) * High Speed Data Input Rate: 5.0 MHz * ROMless Serial Input, Dot Addressable Display Ideal for User Defined Characters * Built-in Decoders, Multiplexers and LED Drivers * Wide Viewing Angle, X Axis 55, Y Axis 55 ATTRIBUTES - 140 Bit RAM for User Defined Characters - Eight Dimming Levels plus eight fine dimming levels. - Power Down Model (<250 mW) - Hardware/Software Clear Functions - External Clock-SCE574x only DESCRIPTION The SCE574x is a four digit, dot addressable 5 x 7 dot matrix, serial input, alphanumeric Intelligent Display device. The four digits are packaged in a rugged, high quality, optically transparent, plastic 14 pin DIP with 0.1" pin spacing. The SCE574xP is a SIP version of SCE574x. The SCE574xQ is also a SIP version of the SCE574x but the leads are at right angles to the package so that the part can be mounted vertically. The SIP version parts have only 7 pins. The SIP parts do not have the option of using an external clock. All the electrical descriptions for the SCE574x apply to the SIP versions except the allusions to the external clock. The on-Board CMOS has a 140 bit RAM, one bit associated with one LED, each to generate User Defined Characters. In Power Down Mode, quiescent current is <50 A. The SCE574x is designed for work with the serial port of most common microprocessors. Data is transferred into the display through the Serial Data Input (DATA), clocked by the Serial Data Clock (SDCLK), and enabled by the Load Input (LOAD). The SCE574x Clock I/O (Clk I/O) and Clock Select (CLKSEL) pins offer the user the capability to supply a high speed external multiplex clock. This feature can minimize audio in-band interference for portable communication equipment or eliminate the visual synchronization effects found in high vibration environments such as avionic equipment. (Description continued on next page) 2000 Infineon Technologies Corp. * Optoelectronics Division * San Jose, CA www.infineon.com/opto * 1-888-Infineon (1-888-463-4636) OSRAM Opto Semiconductors GmbH & Co. OHG * Regensburg, Germany www.osram-os.com * +49-941-202-7178 1 March 28, 2000-10 DESCRIPTION (continued) A divide by 16 prescalar is built into the part and can be accessed by software to reduce the multiplex frequency if a high speed external clock is used. Maximum Ratings DC Supply Voltage ............................................ -0.5 to +7.0 Vdc Input Voltage Levels Relative to Ground ............................................... -0.5 to VCC +0.5 Vdc Operating Temperature .....................................-40 C to +85 C Storage Temperature.......................................-40 C to +100 C Maximum Solder Temperature 0.063" below Seating Plane, t<5.0 s ........................................ 260C Relative Humidity at 85C ...................................................85% Maximum Number of LEDs at 100% Brightness................... 64 Maximum Power Dissipation ............................................0.6 W ESD (100 pF, 1.5 kW)........................................................ 2.0 kV Maximum Input Current .................................................130 mA Electrical Characteristics (over operating temperature) Parameter Min. Typ. Max. Units Conditions 4.5 5.0 5.5 V -- -- -- 50 A VCC=5.0 V, all inputs=0 V or VCC 90 115 130 mA VCC=5.0 V, "#" displayed in all 4 digits at 100% brightness at 25C IIL Input current -- -- -10 A VCC=5.0 V, VIN=0 (all inputs) IIH Input current -- -- 10 A VCC=VIN=5.0 V (all inputs) VIH 3.5 -- -- V VCC=4.5 V to 5.5 V VIL -- -- 1.5 V VCC=4.5 V to 5.5 V Row Multiplex Rate 375 768 1086 Hz -- JC-pin -- -- 45 C/W -- VCC ICC (Power Down) (1)(2) ICC 4 digits 20 dots/character(3) Notes: 1) Unused inputs must be tied high. 2) External oscillator must be stopped. 3) Peak current 5/3 x I CC. Electrical Characteristics for SCE574x only Parameter Min. Typ. Max. Units Conditions IOH (CLK I/O) -- -28 -- mA VCC=4.5 V, VOH=2.4 V IOL (CLK I/O) -- 23 -- mA VCC=4.5 V, VOL=0.4 V Fext External Clock Input Frequency 120 -- 3 MHz VCC=5.0 V, CLKSEL=0 Fosc Internal Clock Input Frequency 120 -- 347 kHz VCC=5.0 V, CLKSEL=1 Clock I/O Bus Loading -- -- 240 pF -- Clock Out Rise Time -- -- 500 ns VCC=4.5 V, VOH=2.4 V Clock Out Fall Time -- -- 500 ns VCC=4.5 V, VOH=0.4 V 2000 Infineon Technologies Corp. * Optoelectronics Division * San Jose, CA www.infineon.com/opto * 1-888-Infineon (1-888-463-4636) OSRAM Opto Semiconductors GmbH & Co. OHG * Regensburg, Germany www.osram-os.com * +49-941-202-7178 SCE5740/1/2/3/4/5 2 March 28, 2000-10 Optical Characteristics at 25 C (VCC=5.0 V at 100% brightness level, viewing angle: X axis 55 , Y axis 65 ) Switching Specifications (over operating temperature range and VCC=4.5 V to 5.5 V) Red SCE5740 Symbol Description Min. Units TRC Reset Active Time 600 ns Description Sym. Min. Typ. Units TLDS Load Setup Time 50 ns Luminous Intensity IV 30 60 cd/dot TDS Data Setup Time 50 ns Peak Wavelength peak -- 655 nm TSDCLK Clock Period 200 ns Dominant Wavelength dom -- 639 nm TSDCW Clock Width 70 ns TLDH Load Hold Time 0 ns TDH Data Hold Time 25 ns TWR Total Write Time 2.2 s TBL Time Between Loads 600 ns Yellow SCE5741 Description Sym. Min. Typ. Units Luminous Intensity IV 60 150 cd/dot Peak Wavelength peak -- 583 nm Dominant Wavelength dom -- 585 nm Note: TSDCW is the minimum time the SDCLK may be low or high. The SDCLK period must be a minimum of 200 ns. High Efficiency Red SCE5742 Description Sym. Min. Typ. Units Luminous Intensity IV 60 150 cd/dot Peak Wavelength peak -- 630 nm Dominant Wavelength dom -- 620 nm Description Sym. Min. Typ. Units Luminous Intensity IV 60 150 cd/dot Peak Wavelength peak -- 565 nm Dominant Wavelength dom -- 573 nm Green SCE5743 High Efficiency Green SCE5744 Description Sym. Min. Typ. Units Luminous Intensity IV 80 180 cd/dot Peak Wavelength peak -- 568 nm Dominant Wavelength dom -- 574 nm Description Sym. Min. Typ. Units Luminous Intensity IV 60 150 cd/dot Peak Wavelength peak -- 605 nm Dominant Wavelength dom -- 610 nm Orange SCE5745 Notes: 1. Dot to dot intensity matching at 100% brightness is 1.8:1. 2. Displays within a given intensity category have an intensity matching of 1.5:1 (max.) 2000 Infineon Technologies Corp. * Optoelectronics Division * San Jose, CA www.infineon.com/opto * 1-888-Infineon (1-888-463-4636) OSRAM Opto Semiconductors GmbH & Co. OHG * Regensburg, Germany www.osram-os.com * +49-941-202-7178 SCE5740/1/2/3/4/5 3 March 28, 2000-10 Figure 1. Timing Diagram--Data Write Cycle T LDS LOAD T DS DATA TLDH D0 D7 TDH SDCLK T SDCW T SDCLK Figure 2. Timing Diagram--Instruction Cycle TWR TBL LOAD SDCLK DATA D0 D1 D2 D3 D4 D5 D6 D7 D0 D4 D5 D6 D7 D0 OR LOAD SDCLK DATA D0 D1 D2 D3 2000 Infineon Technologies Corp. * Optoelectronics Division * San Jose, CA www.infineon.com/opto * 1-888-Infineon (1-888-463-4636) OSRAM Opto Semiconductors GmbH & Co. OHG * Regensburg, Germany www.osram-os.com * +49-941-202-7178 SCE5740/1/2/3/4/5 4 March 28, 2000-10 Display Column and Row Format Pin Assignment C0 C1 C2 C3 C4 Row 0 1 1 1 1 1 Row 1 0 0 1 0 0 Row 2 0 0 1 0 0 Row 3 0 0 1 0 0 Row 4 0 0 1 0 0 Row 5 0 0 1 0 0 Row 6 0 0 1 0 0 Pin Function Pin Function 1 VCC 6 RESET 2 Load 7 GROUND 3 Data 8 CLK I/O 4 no connection 9 -13 No Pins 5 SDCLK 14 CLK SELECT Figure 6. Dot Matrix Format 0.043 (1.09) typ. Column Data Ranges Row 0 00H to 1FH Row 4 00H to LFH Row 1 00H to LFH Row 5 00H to LFH Row 2 00H to LFH Row 6 00H to LFH Row 3 00H to LFH 0.175 (4.45) C1 C2 C3 C4 C5 R0 R1 R2 R3 R4 Input/Output Circuits R5 Figures 3 and 4 show the input and output resistor/diode networks used for ESD protection and to eliminate substrate latch-up caused by input voltage over/under shoot. 0.009 (0.23) typ. Figure 3. Inputs R6 0.045 (1.14) typ. Dimensions in inches (mm) Tolerance:.XXX .010 (.25) V CC input Pin Definitions 1 k GND Pin Function Definitions 1 VCC Power supply 2 LOAD Low input enables data clocking into 8-bit serial shift register. When load goes high, the contents of 8-bit serial shift register will be decoded. 3 DATA Serial input data 4 N/C -- 5 SDCLK For loading data into the 8-bit serial data register 6 RST Asynchronous input, when low clears the multiplex counter, address register, control word register, user RAM and data register. Control word register is set to 100% brightness. The display will be blank. 7 GND Supply ground 8 CLK I/O Outputs Master Clock or inputs External Clock 9-13 No Pins -- 14 CLKSEL High=Internal Clock (Master) Low=External Clock (Slave) Figure 4. Clock I/O (SCE574x only). VCC input/output 1 k GND Figure 5. Top View 14 Digit 0 1 0.270 (6.86) Pins Digit1 Digit 2 Pins 8 Digit 3 7 2000 Infineon Technologies Corp. * Optoelectronics Division * San Jose, CA www.infineon.com/opto * 1-888-Infineon (1-888-463-4636) OSRAM Opto Semiconductors GmbH & Co. OHG * Regensburg, Germany www.osram-os.com * +49-941-202-7178 SCE5740/1/2/3/4/5 5 March 28, 2000-10 Figure 7. Block Diagram RST CLK I/O CLKSEL OSC - 64 Counter -7 Counter Row Control Logic and Row Drivers Mux Rate Rows 0 to 6 Load Y Address Decode SDCLK 8 Bit Serial Register Data Column Drivers Digit 0 to 4 User RAM Memory Display Columns 0 1 2 3 0 to 20 7x20 Bits X Address Decode 3 Bit Address Register 6 Bit Control Word Register Control Word Logic Operation of the SCE574x The SCE574x display consists of a CMOS IC containing control logic and drivers for four 5 x 7 characters. These components are assembled in a compact plastic package. The following explains how to format the serial data to be loaded into the display. The user supplies a string of bit mapped decoded characters. The contents of this string is shown in Figure 8a. Figure 8b shows that each character consist of eight 8 bit words. The first word encodes the display character location and the succeeding seven bytes are row data. The row data represents the status (On, Off) of individual column LEDs. Figure 8c shows that each 8 bit word is formatted to represent Character Address, or Column Data. Individual LED dot addressability allows the user great freedom in creating special characters or mini-icons. The serial data interface provides a highly efficient interconnection between the display and the mother board. The SCE574x requires only three lines as compared to 14 lines for an equivalent four character parallel input part. Figure 8d shows the sequence for loading the bytes of data. Bringing the LOAD line low enables the serial register to accept data. The shift action occurs on the low to high transition of the serial data clock (SDCLK). The least significant bit (D0) is loaded first. After eight clock pulses the LOAD line is brought high. With this transition the OPCODE is decoded. The decoded OPCODE directs D4-D0 to be latched in the Character Address register, stored in the RAM as Column data, or latched in the Control Word register. The control IC requires a minimum 600 ns delay between successive byte loads. The on-board CMOS IC is the electronic heart of the display. The IC accepts decoded serial data, which is stored in the internal RAM. Asynchronously the RAM is read by the character multiplexer at a strobe rate that results in a flicker free display. Figure 7 shows the three functional areas of the IC. These include: the input serial data register and control logic, a 140 bits two port RAM, and an internal multiplexer/display driver. 2000 Infineon Technologies Corp. * Optoelectronics Division * San Jose, CA www.infineon.com/opto * 1-888-Infineon (1-888-463-4636) OSRAM Opto Semiconductors GmbH & Co. OHG * Regensburg, Germany www.osram-os.com * +49-941-202-7178 SCE5740/1/2/3/4/5 6 March 28, 2000-10 Figure 8. Loading Serial Character Data Example: Serial Clock=5.0 MHz, Clock Period=200 ns 352 Clock Cycles, 70.4 s a. Character 0 Character 1 Character 2 Character 3 88 Clock Cycles, 17.6 s b. Character 0 Address Row 0 Row 1 Row 2 Row 3 Row 4 Column Data Column Data Column Data Column Data Column Data 11 Clock Cycles, 2.2 s c. Row 5 Column Data Row 6 Column Data 11 Clock Cycles, 2.2 s Time Character Address OPCODE D0 D1 D2 D3 D4 D5 D6 D7 Between Loads 0 0 0 0 0 1 0 1 600ns(min) Time Column Data OPCODE D0 D1 D2 D3 D4 D5 D6 D7 Between Loads 0 0 600ns(min) D D D D D 0 LOAD Clock Period Serial Clock DATA d. D0 D1 D2 D3 D4 D5 D6 D7 Time between Loads t0 Table 1 shows the Row Address for the example character "D." Column data is written and read asynchronously from the 140 bit RAM. Once loaded the internal oscillator and character multiplexer reads the data from the RAM. These characters are row strobed with column data as shown in Figures 9 and 10. The character strobe rate is determined by the internal or user supplied external MUX Clock, the IC's counter and the prescaler. Figure 9. Row and Column Locations for a Character "D" Row 0 off LED Row 1 on LED Row 2 Row 3 Table 1. Character "D" Op code D7 D6 D5 Row 4 Column Data D4 D3 D2 D1 D0 C0 C1 C2 C3 C4 Hex Row 5 Row 6 Row 0 0 0 0 1 1 1 1 0 1E Row 1 0 0 0 1 0 0 0 1 11 Row 2 0 0 0 1 0 0 0 1 11 Row 3 0 0 0 1 0 0 0 1 11 Row 4 0 0 0 1 0 0 0 1 11 Row 5 0 0 0 1 0 0 0 1 11 Row 6 0 0 0 1 1 1 1 0 1E 2000 Infineon Technologies Corp. * Optoelectronics Division * San Jose, CA www.infineon.com/opto * 1-888-Infineon (1-888-463-4636) OSRAM Opto Semiconductors GmbH & Co. OHG * Regensburg, Germany www.osram-os.com * +49-941-202-7178 0 1 2 3 4 Columns SCE5740/1/2/3/4/5 7 March 28, 2000-10 Figure 10. Row Strobing ROW LOAD LOAD ROW 0 LOAD ROW 1 LOAD ROW 2 LOAD ROW 3 LOAD ROW 4 LOAD ROW 5 LOAD ROW 6 Row 0 Row 0 Row 0 Row 0 Row 0 Row 0 Row 0 Row 1 Row 1 Row 1 Row 1 Row 1 Row 1 Row 1 Row 2 Row 2 Row 2 Row 2 Row 2 Row 2 Row 2 Row 3 Row 3 Row 3 Row 3 Row 3 Row 3 Row 3 Row 4 Row 4 Row 4 Row 4 Row 4 Row 4 Row 4 Row 5 Row 5 Row 5 Row 5 Row 5 Row 5 Row 5 Row 6 Row 6 Row 6 Row 6 Row 6 Row 6 0 1 2 3 4 Columns 0 1 2 3 4 Columns 0 1 2 3 4 Columns 0 1 2 3 4 Columns 0 1 2 3 4 Columns Row 6 0 1 2 3 4 Columns 0 1 2 3 4 Columns Multiplexer and Display Driver The four characters are row multiplexed with RAM resident column data. The strobe rate is established by the internal or external MUX Clock rate. The MUX Clock frequency is divided by a 448 counter chain. This results in a typical strobe rate of 768 Hz. By pulling the Clock SEL line low, the display can be operated from an external MUX Clock. The external clock is attached to the CLK I/O connection (pin 8). The maximum external MUX Clock frequency should be limited to 3 MHz. When a high speed external clock is used the frequency can be further divided down by 16 by using the built in prescaler. In the control word format data bit D4 is set high (D4=1). It is not recommended to use the prescaler with the internal clock. An asynchronous hardware Reset (pin 6) is also provided. Bringing this pin low will clear the Character Address Register, Control Word Register, RAM, and blanks the display. This action leaves the display set at Character Address 0, and the Brightness Level set at 100%. The user can activate four Control functions. These include: LED Brightness Level, IC Power Down, Prescaler, or Display Clear. OPCODEs and six bit words are used to initiate these functions. The OPCODEs and Control Words for the Character Address and Loading Column Data are shown in Tables 2 and 3. Basic Instruction Set Instruction Opcode Address/Data LCD 000 D4 D3 D2 D1 D0 Load Column Data LDA 101 X X A2 A1 A0 Load Digit Address SCL 110 PS B3 B2 B1 B0 Software Clear LCWD 111 PS B3 B2 B1 B0 Load Control Word Data 2000 Infineon Technologies Corp. * Optoelectronics Division * San Jose, CA www.infineon.com/opto * 1-888-Infineon (1-888-463-4636) OSRAM Opto Semiconductors GmbH & Co. OHG * Regensburg, Germany www.osram-os.com * +49-941-202-7178 Comments SCE5740/1/2/3/4/5 8 March 28, 2000-10 Control Word Register: The Control Word is a 5 bit write only register which controls the display attributes. Below are the truth tables which defines each bit in the Control Word Register and a description of their functions. Control Word Format D7 D6 D5 D4 D3 D2 D1 D0 1 1 1 PS B3 B2 B1 B0 Pre-Scalar B2 B1 B0 Brightness PS=1 MUX Clock/16 =0 No divide by 16 0 0 0 100% 0 0 1 53% 0 1 0 40% 0 1 1 27% 1 0 0 20% 1 0 1 13% 1 1 0 6.6% 1 1 1 Blank Display & Power Down 0 Full Peak Current 1 Reduce Peak Current to 12.5% Table 2. Load Character Address Op code D7 D6 D5 Character Address D4 D3 D2 D1 D0 Hex Operation Load 1 0 1 0 0 0 0 0 A0 Character 0 1 0 1 0 0 0 0 1 A1 Character 1 1 0 1 0 0 0 1 0 A2 Character 2 1 0 1 0 0 0 1 1 A3 Character 3 Table 3. Load Column Data Op code D7 D6 D5 Column Data D4 D3 D2 D1 D0 Operation Load 0 0 0 C0 C1 C2 C3 C4 Row 0 0 0 0 C0 C1 C2 C3 C4 Row 1 0 0 0 C0 C1 C2 C3 C4 Row 2 0 0 0 C0 C1 C2 C3 C4 Row 3 0 0 0 C0 C1 C2 C3 C4 Row 4 0 0 0 C0 C1 C2 C3 C4 Row 5 0 0 0 C0 C1 C2 C3 C4 Row 6 2000 Infineon Technologies Corp. * Optoelectronics Division * San Jose, CA www.infineon.com/opto * 1-888-Infineon (1-888-463-4636) OSRAM Opto Semiconductors GmbH & Co. OHG * Regensburg, Germany www.osram-os.com * +49-941-202-7178 SCE5740/1/2/3/4/5 9 March 28, 2000-10 The user can select eight specific LED brightness levels (Table 4) by changing the peak current driving the LEDs. The peak current is varied by varying the ON time of the row drivers. Note that data line 3 is low (logic 0). The SCE574x offers a unique Display Power Down feature which reduces ICC to less than 50 A. When EFHEX is loaded (Table 6) the display is set to 0% brightness. When in the Power Down mode data may still be written into the RAM. The display is reactivated by loading a new brightness Level Control Word into the display. If dimming is required with finer control between 12.5% brightness and 0.0% brightness, data line 3 can be set high (logic 1). The 12.5% peak current is now the brightness reference (100%-E8) for further dimming and as shown in Table 5 eight levels of dimming are provided. For example the hex code EC in Table 5 will provide a brightness level 29% lower than the 12.5% brightness level. Table 6. Power Down Table 4. Display Brightness Op code D7 D6 D5 Control Word D4 D3 D2 D1 D0 Hex Operation Level 1 0 EF 0% brightness 1 1 1 1 1 1 The Software Clear (C0HEX), given in Table 7, clears the Address Register and the RAM. The display is blanked and the Character Address Register will be set to Character 0. The internal counter and the Control Word Register are unaffected. The Software Clear will remain active until the next data input cycle is initiated. Op code D7 D6 D5 Control Word D4 D3 D2 D1 D0 Hex Brightness Level 1 1 1 0 0 0 0 0 E0 100% 1 1 1 0 0 0 0 1 E1 53% 1 1 1 0 0 0 1 0 E2 40% 1 1 1 0 0 0 1 1 E3 27% 1 1 1 0 0 1 0 0 E4 20% Op code D7 D6 D5 Control Word D4 D3 D2 D1 D0 Hex Operation 1 1 1 0 0 1 0 1 E5 13% 1 0 C0 CLEAR 1 1 1 0 0 1 1 0 E6 6.6% 1 1 1 0 0 1 1 1 E7 0.0% Table 7. Software Clear 1 0 0 0 0 0 Table 5. Display Brightness Op code D7 D6 D5 Control Word D4 D3 D2 D1 D0 Hex Brightness Level 1 1 1 0 1 0 0 0 E8 100% 1 1 1 0 1 0 0 1 E9 53% 1 1 1 0 1 0 1 0 EA 40% 1 1 1 0 1 0 1 1 EB 27% 1 1 1 0 1 1 0 0 EC 20% 1 1 1 0 1 1 0 1 ED 13% 1 1 1 0 1 1 1 0 EE 6.6% 1 1 1 0 1 1 1 1 EF 0.0% 2000 Infineon Technologies Corp. * Optoelectronics Division * San Jose, CA www.infineon.com/opto * 1-888-Infineon (1-888-463-4636) OSRAM Opto Semiconductors GmbH & Co. OHG * Regensburg, Germany www.osram-os.com * +49-941-202-7178 SCE5740/1/2/3/4/5 10 March 28, 2000-10 Optical Considerations Electrical and Mechanical Considerations Thermal Considerations The 0.180" high character of the SCE574x gives readability up to five feet. Proper filter selection enhances readability over this distance. Optimum product performance can be had when the following electrical and mechanical recommendations are adopted. The IC is constructed in a high speed CMOS process, consequently noise on the SERIAL DATA, SERIAL DATA CLOCK, LOAD and RESET lines may cause incorrect data to be written into the serial shift register. Adhere to transmission line termination procedures when using fast line drivers and long cables (>10 cm). Using filters emphasizes the contrast ratio between a lit LED and the character background. This will increase the discrimination of different characters. The only limitation is cost. Take into consideration the ambient lighting environment for the best cost/benefit ratio for filters. Incandescent (with almost no green) or fluorescent (with almost no red) lights do not have the flat spectral response of sunlight. Plastic band-pass filters are an inexpensive and effective way to strengthen contrast ratios. The SCE5740 is a red display and should be used with long wavelength pass filter having a sharp cut-off in the 600 nm to 620 nm range. The SCE5742 is a high efficiency red display and should be used with long wavelength pass filter having a sharp cut-off in the 570 nm to 600 nm range. The SCE5744 is a high efficiency green display and should be used with long wavelength pass filter that peaks at 565 nm. Good ground and power supply decoupling will insure that ICC (<400 mA peak) switching currents do not generate localized ground bounce. Therefore it is recommended that each display package use a 0.1 F and 0 F capacitor between VCC and ground. When the internal MUX Clock is being used connect the CLKSEL pin to VCC. In those applications where RESET will not be connected to the system's reset control, it is recommended that this pin be connected to the center node of a series 0.1, F and 100 k RC network. Thus upon initial power up the RESET will be held low for 10 ms allowing adequate time for the system power supply to stabilize. Additional contrast enhancement is gained by shading the displays. Plastic band-pass filters with built-in louvers offer the next step up in contrast improvement. Plastic filters can be improved further with anti-reflective coatings to reduce glare. ESD Protection The input protection structure of the SCE574x provides significant protection against ESD damage. It is capable of withstanding discharges greater than 2.0 kV. Take all the standard precautions, normal for CMOS components. These include properly grounding personnel, tools, tables, and transport carriers that come in contact with unshielded parts. If these conditions are not, or cannot be met, keep the leads of the device shorted together or the parts in anti-static packaging. Optimal filter enhancements are gained by using circular polarized, anti-reflective, band-pass filters. The circular polarizing further enhances contrast by reducing the light that travels through the filter and reflects back off the display to less than 1%. Several filter manufacturers supply quality filter materials. Some of them are: Panelgraphic Corporation, W. Caldwell, NJ; SGL Homalite, Wilmington, DE; 3M Company, Visual Products Division, St. Paul, MN; Polaroid Corporation, Polarizer Division, Cambridge, MA; Marks Polarized Corporation, Deer Park, NY, Hoya Optics, Inc., Fremont, CA.One last note on mounting filters: recessing displays and bezel assemblies is an inexpensive way to provide a shading effect in overhead lighting situations. Several Bezel manufacturers are: R.M.F. Products, Batavia, IL; Nobex Components, Griffith Plastic Corp., Burlingame, CA; Photo Chemical Products of California, Santa Monica, CA; I.E.E.-Atlas, Van Nuys, CA. The trade-off is fuzzy characters. Mounting the filters close to the display reduces this effect. Take care not to overheat the plastic filter by allowing for proper air flow. Soldering Considerations The SCE574x can be hand soldered with SN63 solder using a grounded iron set to 260C. Wave soldering is also possible following these conditions: Preheat that does not exceed 93C on the solder side of the PC board or a package surface temperature of 85C. Water soluble organic acid flux (except carboxylic acid) or rosin-based RMA flux without alcohol can be used. Wave temperature of 245C 5C with a dwell between 1.5 sec. to 3.0 sec. Exposure to the wave should not exceed temperatures above 260C for five seconds at 0.063" below the seating plane. The packages should not be immersed in the wave. Microprocessor Interface The microprocessor interface is through the serial port, SPI port or one out of eight data bits on the eight bit parallel port and also control lines SDCLK and LOAD. Post Solder Cleaning Procedures The least offensive cleaning solution is hot D.I. water (60C) for less than 15 minutes. Addition of mild saponifiers is acceptable. Do not use commercial dishwasher detergents. Power Up Sequence For faster cleaning, solvents may be used. Exercise care in choosing solvents as some may chemically attack the nylon package. For further information refer to Appnotes 18 and 19. Upon power up display will come on at random. Thus the display should be reset at power-up. The reset will set the Address Register to Digit 0, User RAM is set to 0 (display blank) the Control Word is set to 0 (100% brightness) and the internal counters are reset. An alternative to soldering and cleaning the display modules is to use sockets. Naturally, 14 pin DIP sockets .300" wide with .100" centers work well for single displays. Multiple display assemblies are best handled by longer SIP sockets or DIP sockets when available for uniform package alignment. 2000 Infineon Technologies Corp. * Optoelectronics Division * San Jose, CA www.infineon.com/opto * 1-888-Infineon (1-888-463-4636) OSRAM Opto Semiconductors GmbH & Co. OHG * Regensburg, Germany www.osram-os.com * +49-941-202-7178 SCE5740/1/2/3/4/5 11 March 28, 2000-10 Figure 11. Display Interface to Siemens/Intel 8031 Microprocessor (using serial port in mode 0) VCC 18 40 RxD XTAL2 TxD 11 19 XTAL1 U1 8031 VCC VCC 10 9 RST 5 SDCLK 22 f TAN + DATA 3 2 LD ID P3.7 17 6 P3.3 13 7 P3.4 14 VCC 1 RST CLKSEL 14 GND CLK I/O 8 .01 f Figure 12. Display Interface to Siemens/Intel 8031 Microprocessor (using one bit of parallel port as serial port) VCC VCC 40 P3.0 10 18 XTAL2 P3.1 11 P3.6 16 19 XTAL1 P0.0 5 SDCLK 2 LD DATA 3 39 ID U1 8031 VCC 22 F TAN + VCC 1 6 RST CLKSEL 14 GND CLK I/O 8 7 1 RST 9 P1.0 .01 F 20 Figure 13. Display Interface with Motorola 68HC05C4 Microprocessor (using SPI port) VCC VCC 38 40 OSC1 39 OSC2 5 SDCLK 2 LD DATA 3 11 PA0 10 PA1 33 SCLK MOSI 32 ID VCC 1 CS 14 6 RST 7 GND CLK I/O 8 U1 68HC05C4 VCC 22 F TAN + .01 F 1 RST 9 PA2 20 2000 Infineon Technologies Corp. * Optoelectronics Division * San Jose, CA www.infineon.com/opto * 1-888-Infineon (1-888-463-4636) OSRAM Opto Semiconductors GmbH & Co. OHG * Regensburg, Germany www.osram-os.com * +49-941-202-7178 SCE5740/1/2/3/4/5 12 March 28, 2000-10 Figure 14. Cascading Multiple Displays using only the SCE574x. RST VCC RST CLK I/O CLK SEL Intelligent Display DATA SDCLK LOAD 14 more displays in between RST CLK I/O CLK SEL Intelligent Display DATA SDCLK LOAD DATA SDCLK A0 A1 A2 A3 0 Chip Address Decoder 15 LD CE Address Decode 1-14 Multiple displays can be cascaded using the CLK SEL and CLK I/O pins (Figure 14). The display designated as the MasterClock source should have its CLK SEL pin tied high and the slaves should have their CLK SEL pins tied low. All CLK I/O pins should be tied together. One display CLK I/O can drive 15 slave CLK I/Os. Use RST to synchronize all display counters. Loading Data into the Display Use following procedure to load data into the display: 1. Power up the display. 2. Bring RST low (600 ns duration minimum) to clear the Multiplex Counter, Address Register, Control Word Register, User Ram and Data Register. The display will be blank. Display brightness is set to 100%. 3. If a different brightness is desired, load the proper brightness opcode into the Control Word Register. 4. Load the Digit Address into the display. 5. Load display row and column data for the selected digit. 6. Repeat steps 4 and 5 for all digits. Data Contents for the Word "ABCD" Step D7 D6 D5 D4 D3 D2 D1 D0 Function A 1 B (optional) 1 1 1 0 1 0 0 0 0 0 0 0 0 0 0 CLEAR 100% BRIGHTNESS 1 2 3 4 5 6 7 8 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 0 0 1 0 1 0 0 0 0 1 0 0 1 0 0 0 0 0 1 0 1 0 0 0 0 0 0 1 1 1 1 1 DIGIT D0 SELECT ROW 0 (A) ROW 1 (A) ROW 2 (A) ROW 3 (A) ROW 4 (A) ROW 5 (A) ROW 6 (A) 9 10 11 12 13 14 15 16 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 1 1 1 1 0 1 1 1 DIGIT D1 SELECT ROW 0 (B) ROW 1 (B) ROW 2 (B) ROW 3 (B) ROW 4 (B) ROW 5 (B) ROW 6 (B) 17 18 19 20 21 22 23 24 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 1 0 0 1 0 0 0 0 0 1 1 1 0 0 0 0 0 1 0 1 0 0 0 0 0 1 DIGIT D2 SELECT ROW 0 (C) ROW 1 (C) ROW 2 (C) ROW 3 (C) ROW 4 (C) ROW 5 (C) ROW 6 (C) 25 26 27 28 29 30 31 32 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 1 0 0 0 0 0 1 0 1 0 0 0 0 0 1 1 1 0 0 0 0 0 1 1 0 1 1 1 1 1 0 DIGIT D3 SELECT ROW 0 (D) ROW 1 (D) ROW 2 (D) ROW 3 (D) ROW 4 (D) ROW 5 (D) ROW 6 (D) 2000 Infineon Technologies Corp. * Optoelectronics Division * San Jose, CA www.infineon.com/opto * 1-888-Infineon (1-888-463-4636) OSRAM Opto Semiconductors GmbH & Co. OHG * Regensburg, Germany www.osram-os.com * +49-941-202-7178 SCE5740/1/2/3/4/5 13 March 28, 2000-10 Figure 15. Detail Drawing of SCE574x Dimensions in Inches (mm) 0.197 ( 3 pl.) (5.00) 0.100 (2.54) 0.400 .015 (10.16 .38) 0.180 (4.57) 0.784 (19.91) Part Number 0.200 (5.08) 0.012 (.3) .002 (.05) SCE574x SIEMENS 0.300 0.020 (7.62 0.51) 0.150 (3.81) EIA Date Code Luminous Intensity XXYY Z Code 0.160 .020 (4.06 .51) Pin 1 Indicator 0.018 (.46) .100 (2.54) Non-cumulative (12 pl.) Table 8. Pin Functions for SCE574x Pin # Function Pin # Function 1 VCC 6 RESET 2 Load 7 GROUND 3 Data 8 CLK I/O 4 No Pin 9--13 No Pins 5 SDCLK 14 CLK SELECT Top View Typical Character Pin 8 Pin 14 0.028 (0.71) 0.022 (0.56) Pin 1 2000 Infineon Technologies Corp. * Optoelectronics Division * San Jose, CA www.infineon.com/opto * 1-888-Infineon (1-888-463-4636) OSRAM Opto Semiconductors GmbH & Co. OHG * Regensburg, Germany www.osram-os.com * +49-941-202-7178 Pin 7 SCE5740/1/2/3/4/5 14 March 28, 2000-10 Figure 16. Detail Drawing of SCE574xP (SIP configuration) Dimensions in Inches (mm) 0.784 (19.91) 0.197 (5.00) (3 plcs) 0.048 (1.22) 0.180 (4.57) 0.200 (5.08) 0.012 (0.30) (6 plcs) 0.400 (10.16) 0.150 (3.81) 0.100 (2.54) (4 plcs) Part Number SCE574XP SIEMENS XXYY EIA Date Code Luminous Intensity Code Z 0.1600.020 (4.060.51) Pin 1 Indicator 0.100 (2.54) (Tol. Non Accum.) (4 plcs) 0.018 (0.46) (8 plcs) 0.200 (5.08) Note: Unless otherwise specified, tolerance on dimensions is .010 in. (0.25 mm) Figure 17. Detail Drawing of SCE574xQ (SIP configuration with right angle bend) Dimensions in Inches (mm) 0.784 (19.91) 0.197 (5.00) (3 plcs) 0.048 (1.22) 0.180 (4.57) 0.200 (5.08) 0.400 (10.16) 0.100 (2.54) (4 plcs) 0.150 (3.81) EIA Date Code Luminous Intensity Code Part Number SCE574XQ SIEMENS XXYY Pin 1 Indicator 0.1600.020 (4.060.51) 0.100 (2.54) (Tol. Non Accum.) (4 plcs) Z 0.0500.020 (1.260.51) 0.018 (0.46) (6 plcs) 0.200 (5.08) Note: Unless otherwise specified, tolerance on dimensions is .010 in. (0.25 mm) Table 9. Pin Functions for SCE574xP and SCE574xQ Pin # Function 1 VCC 2 Load 3 Data 4 No Pin 5 SDCLK 6 RESET 7 GND Top View Typical Character 0.028 (0.71) Pin 1 2000 Infineon Technologies Corp. * Optoelectronics Division * San Jose, CA www.infineon.com/opto * 1-888-Infineon (1-888-463-4636) OSRAM Opto Semiconductors GmbH & Co. OHG * Regensburg, Germany www.osram-os.com * +49-941-202-7178 Pin 7 0.022 (0.56) SCE5740/1/2/3/4/5 15 March 28, 2000-10