SmartSwitch TM Wide View Compact LCD 36 x 24 Pushbutton DISTINCTIVE CHARACTERISTICS Compact Size • Perfect for rack mount router and other applications with space limitations. Compact body size: 19.0mm (.748”) x 18.0mm (.709”) compared to Standard body size: 23.13mm (.911”) x 20.59mm (.811”) • Vibrant Illumination • Low Energy Consumption Programmable LCD Variety of LED Backlighting Colors Rubber Dome Epoxy Sealed Straight PC Terminals Snap-in standoff for easy, secure mounting and alignment Programmable to display graphics, alphanumeric characters and animated sequences. Actual Size Integrated liquid crystal display provides wide viewing angle with high contrast and clarity. Viewing area 14.5mm x 11.8mm (horizontal x vertical) at 36 x 24 pixels. Dome gives crisp tactile feedback to positively indicate circuit transfer. High reliability and long life of one million actuations minimum. Epoxy sealed terminals prevent entry of solder flux and other contaminants. Optional accessories available to simplify production process. ATTENTION ELECTROSTATIC SENSITIVE DEVICES PART NUMBER & DESCRIPTION Part Number Switch Description LCD Mode LED Color IS15BSBFP4RGB SPST Momentary ON Gold Contacts Straight PC Terminals Black & White FSTN Positive * Red/Green/Blue RGB * Simultaneous RGB illumination achieves infinite colors. Note: Contact factory for additional options. www.nkk.com 4.1.15 1 SmartSwitch TM Wide View Compact LCD 36 x 24 Pushbutton SWITCH SPECIFICATIONS LCD SPECIFICATIONS Circuit SPST normally open Characteristics of Display Electrical Capacity (Resistive Load) 100mA @ 12V DC Display Operation Mode FSTN positive Contact Resistance 200 milliohms maximum @ 20mV 10mA Display Condition Transflective with built-in LED backlight Insulation Resistance 100 megohms minimum @ 100V DC Viewing Angle Direction 6 o'clock Dielectric Strength 125V AC for 1 minute minimum Driving Method 1/24 duty. 1/5 bias (built-in driving circuit) Mechanical Endurance 1,000,000 operations minimum Viewing Area 14.5mm x 11.8mm (horizontal x vertical) Electrical Endurance 1,000,000 operations minimum Pixel Format 36 x 24 pixels (horizontal x vertical) Operating Force 2.2 ± 0.5 Newtons Pixel Size 0.371mm x 0.445mm (horizontal x vertical) Total Travel 1.8mm (.071”) * Operating Temperature Range –20°C ~ +60°C (–4°F ~ +140°F) Storage Temperature Range –30°C ~ +70°C (–22°F ~ +158°F) Backlight LED RGB: red/green/blue Absolute Maximum Ratings (Temperature at 25°C) Items Symbols Ratings * In a low temperature environment (below 0°C), speed and contrast decrease when image changes. The non-indicator dot may become dense in a high temperature environment (about +50°C). Supply Voltage for Logics VDD –0.3V to +7.0V Supply Voltage for LCD VLC –0.3V to +12.0V Input Voltage VI –0.3V to VDD +0.3V Output Voltage VO –0.3V to VDD +0.3V Recommended Operating Conditions (Temperature at 25°C) Optical Characteristics (Temperature at 25°C) Items Contrast Ratio Items Symbols Minimum Typical Maximum Supply Voltage for Logics VDD 4.5V 5.0V 5.5V Supply Voltage VLC 7.1 7.3V 7.5 –– VDD Symbols Min Typical Max Cr –– 3.0 –– Input Voltage VI 0V Viewing Angle Up & Down q –– 90° –– Driving Frequency f FLM –– (Cr ≥ 1.1) Right & Left f –– 90° –– Clock Operation Frequency f SCP –– 150Hz –– –– 6.0MHz DC Characteristics of LCD Drive IC (Temperature at –20°C to +60°C and VDD = 5V ±10%) Items Symbols Test Conditions Minimum Typical Unit High Level Input Voltage VIH 0.7 VDD VDD V Low Level Input Voltage VIL 0 0.3 VDD V High Level Input Leakage Current I LIH VI = VDD 10 µA Low Level Input Leakage Current I LIL VI = 0V 10 µA High Level Output Voltage VOH I OH = –500µA Low Level Output Voltage VOL I OL = 500µA 0.5 V High Level Output Leakage Current I LOH VO = VDD 10 µA Low Level Output Leakage Current I LOL VO = 0V 10 µA Supply Current I DD f SCP = 1.0MHz 500 µA LCD Drive Current I LC f LP = 2.4kHz VLC = 7.3V 2,000 µA VDD –0.5 Timing Diagram (Temperature at –20°C to +60°C and VDD = 5.0V ±10%) Items Clock Operation Frequency Latch Pulse Frequency Symbols V 500 Timing Characteristics of LCD Drive IC 2 Maximum Minimum Maximum f SCP 6.0MHz f LP 50kHz Clock High Level Pulse Width t CWH 70ns Clock Low Level Pulse Width t CWL 70ns Data Setup Time t DSD 45ns Data Hold Time t DHD 50ns Data Output Delay Time t PDO t DSL 50ns Latch Hold Time t DHL 50ns Latch High Level Width t LWH 200ns FLM Setup Time t DSF 50ns FLM Hold Time t DHF 50ns SCP, LP Rise/Fall Time t r /t f SCP Din tCWH tCWL tDSD tf tDHD tPDO *1 Dout 25ns Latch Setup Time tr LP FLM 15ns www.nkk.com *2 tDSL tr *3 tLWH tDSF *1 Last data on first line *2 Beginning data on second line *3 Location of LP signal on first line tDHL tf tDHF SmartSwitch TM Wide View Compact LCD 36 x 24 Pushbutton BLOCK DIAGRAM & PIN CONFIGURATIONS 7 IS15BSBFP4RGB RGB LED Backlight Black and White LCD 9 10 1 Timing Control LP seg1 seg36 Segment Driver 40bit Latch CK 40bit D Shift Register Q Din 5 Dout 2 SW 3 BL-LED (–) 4 BL-LED (–) 14 BL-LED (–) GND SW Blue BL-LED (+) Green Pin No. 36 x 24 Dot Matrix LCD Panel CK Red 13 Com24 8 FLM SCP Com1 6 Common Driver 11 D 24bit CK Shift Register 12 VLC VDD Symbol Name Function 1 SW Terminal of Switch Normally open 2 SW Terminal of Switch Normally open 3 BL-LED (–) Terminal of Backlight LED Cathode for red 4 BL-LED (–) Terminal of Backlight LED Cathode for blue 5 Dout Data Output Display serial output. Can be used to connect to Din of the next SMARTSWITCH. As a result, many SMARTSWITCHES can be controlled with one clock and data signal. 6 FLM First Line Marker The marking signal for the first line data of LCD display. The first line of LCD will be selected by the falling edge of LP signal during the high level (FLM). 7 LP Latch Pulse Line data latch pulse will latch content of internal 40-bit shift register at falling edge for one line of display. LP will also increment the display line by one. 8 SCP Serial Clock Pulse Clock used by 40-bit internal shift register of the switch, shifting the display data bit presented at Din at falling edge. 9 Din Data Input Display serial data bit. Note: to map the display data, because of the difference between the number of internal shift register data (40) and the single line of LCD pixels (36), the first four bits of data shifted will be dummy bits. 10 GNDGround 11 VDD Power Power source for logic circuit 12 VLC Power Power source for LCD drive 13 BL-LED (+) Terminal of Backlight LED Anode for common 14 BL-LED (–) Terminal of Backlight LED Cathode for green www.nkk.com 3 SmartSwitch TM Wide View Compact LCD 36 x 24 Pushbutton RGB LED CHARACTERISTICS Typical Electrical Characteristics (Temperature at 25°C) Backlight Color Symbols Red Green Blue Unit Forward Current IF 10 8.5 8.0 mA Forward Voltage VF 2.0 2.8 2.8 V ABSOLUTE MAXIMUM FOR LEDS Electrical Characteristics (Temperature at 25°C) Backlight Color Symbols Red Green Blue Unit Forward Current IF 20 20 20 mA Forward Voltage VF 2.0 (I F = 10mA) 2.8 (I F = 8.5mA) 2.8 (I F = 8.0mA) V Reverse Voltage VR 4.0 4.0 4.0 V Current Reduction Rate Above 25°C ∆ I F (D C ) –0.33 –0.33 –0.33 mA/°C *Power Dissipation (LED Overall 115mW) PD 40 60 60 mW *For uniform light emission, Power Dissipation should not exceed the Absolute Maximum Rating, and the Forward Current should not exceed the derated Absolute Forward Current. TYPICAL SWITCH DIMENSIONS (14.5) .571 (14.06) .554 See Pixel Detail (10.8) .425 See Standoff Detail (10.0) .394 (16.0) .630 (0.3) Typ .012 Standoff 1 (0.2) Typ .008 Standoff 2 (11.0) .433 1 (7.62) (15.0) .300 .591 4 3 (0.4) Typ .016 (15.5) .610 Standoff 2 (19.0) .748 13 14 (0.6) Typ .024 (12.8) .504 2 (11.8) .465 (11.14) .439 (18.0) .709 (23.0) .906 (3.2) .126 (6.35) .250 (6.15) .242 (1.0) Typ .039 Standoff 1 (2.0) .079 Terminal numbers are not on the switch. (0.371) .0146 (0.02) Typ .0008 (0.3) .012 A (1.25) .049 (0.445) .0175 (2.0) Dia .079 Pixel Detail Standoff Detail Dimension A Standoff 1 = (2.7) Standoff 2 = (2.3) .091 .106 4 (16.0) .630 12x (0.75) Dia .030 www.nkk.com (11.0) .433 13 14 11 12 9 10 8 7 5 6 4 3 (1.0) Typ .039 (2.0) .079 2x (0.9) Dia .035 2 1 (6.35) .250 (6.15) .242 Footprint (7.62) .300 (15.0) .591 4x (1.3) Dia .051 Landless SmartSwitch TM Handling & Storage PRECAUTIONS FOR HANDLING & STORAGE OF LCD 36 x 24 DEVICES Handling ATTENTION ELECTROSTATIC SENSITIVE DEVICES 1. The IS Series devices are electrostatic sensitive. 2. Limit operating force to keytop to 100.0N maximum, as excessive pressure may damage the LCD device. 3. The IS series devices are not process sealed. 4. If the LCD is accidentally broken, avoid contact with the liquid and wash off any liquid spills to the skin or clothing. 5. Clean cap surface with dry cloth. If further cleaning is needed, wipe with dampened cloth using neutral cleanser and dry with clean cloth. Do not use organic solvent. 6. Recommended soldering time and temperature limits: Do not exceed 70°C at the LCD level. Wave Soldering: see Profile B in the Supplement section. Manual Soldering: see Profile A in the Supplement section. 7. Recommendation for backlight color uniformity: Use constant current driver. For current limiting resistor method, the power source should be at least twice the backlight LED forward voltage. 8. The VLC voltage should not be applied before logic voltage. If VLC voltage is present before logic voltage, it may cause the driver logic to freeze and damage the LCD, and the driver logic may become damaged. 9. Backlight Forward Current should not exceed the derated Absolute Maximum Forward Current based on the temperature. 10. Excessive images may result after the same image is emitted continuously for an extended period of time. Storage 1. Store in original container and away from direct sunlight. 2. Keep away from static electricity. 3. Avoid extreme temperatures, high humidity, gaseous substances, and all forms of chemical contamination. www.nkk.com 5