SmartSwitch TM Wide View LCD 36 x 24 Pushbutton DISTINCTIVE CHARACTERISTICS Standard with Enhanced LED Illumination: • Broad and even light diffusion • Consistent backlighting • Low energy consumption Programmable LCD Variety of LED Backlighting Colors Rubber Dome Epoxy Sealed Straight PC Terminals Programmable to display graphics, alphanumeric characters and animated sequences. Integrated liquid crystal display provides wide viewing angle with high contrast and clarity. Wider viewing area 7.0mm x 13.0mm (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 enhance panel design and simplify production process. Actual Size DESCRIPTION Part Number Switch Description LCD Mode LED Color IS15BAFP4CF SPST Momentary ON Gold Contacts Straight PC Terminals Black & White FSTN Positive Red/Green www.nkk.com 1 SmartSwitch TM Wide View LCD 36 x 24 Pushbutton SWITCH SPECIFICATIONS Circuit LCD SPECIFICATIONS SPST normally open Electrical Capacity (Resistive Load) 100mA @ 12V DC Characteristics of Display Display Operation Mode FSTN positive Display Condition Transflective with built-in LED backlight Contact Resistance 200 milliohms max @ 20mV 10mA Insulation Resistance 100 megohms min @ 100V DC Viewing Angle 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 Electrical Endurance 1,000,000 operations minimum Viewing Area 17.0mm x 13.0mm (horizontal x vertical) Operating Force 2.2 ± 0.5 Newtons Pixel Format 36 x 24 pixels (horizontal x vertical) Total Travel 1.8mm (.071”) Pixel Size 0.440mm x 0.495mm (horizontal x vertical) Operating Temp. Range –20°C ~ +60°C (–4°F ~ +140°F) Storage Temp. Range –30°C ~ +70°C (–22 °F ~ +158°F) Backlight LED Red/Green Absolute Maximum Ratings (Temperature at 25°C) Items Symbols Recommended Operating Conditions (Temperature at 25°C) Ratings Items Symbols Minimum Typical Maximum Supply Voltage for Logics VDD –0.3V to +7.0V Supply Voltage for Logics VDD 4.5V 5.0V 5.5V Supply Voltage for LCD VLC –0.3V to +12.0V Supply Voltage Black/White VLC 7.1V 7.3V 7.5V Input Voltage VI –0.3V to VD D +0.3V Input Voltage VI 0V –– VDD Output Voltage VO –0.3V to VD D +0.3V Driving Frequency fFLM –– 150Hz: black/white –– DC Characteristics of LCD Drive (Temperature at –20°C to +60°C and VDD = 5.0V ±10%) Items Symbols Test Conditions Minimum Typical Maximum Unit High Level Input Voltage VIH 0.7VDD VD D V Low Level Input Voltage VI L 0 0.3VD D V High Level Input Leakage Current ILI H VI = VD D 10 μA Low Level Input Leakage Current ILIL VI = 0V –10 μA High Level Output Voltage VOH I O H = –500μA Low Level Output Voltage VOL I O L = 500μA 0.5 V High Level Output Leakage Current I LO H VO = VD D 10 μA Low Level Output Leakage Current I LO L VO = 0V –10 μA Supply Current ID D f S CP = 1.0MHz 500 μA LCD Drive Current I LC f L P = 2.4kHz VLC = 7.3V 2,000 μA VDD –0.5 500 Timing Characteristics of LCD Drive IC Timing Diagram (Temperature at –20°C to +60°C and VDD = 5.0V ±10%) Items Symbols Minimum Clock Operation Frequency f SCP Latch Pulse Frequency f LP Clock High Level Pulse Width tC WH 70ns Clock Low Level Pulse Width tC WL 70ns Data Setup Time t DS D 45ns Data Hold Time tD H D 50ns Data Output Delay Time tPD O Latch Setup Time t DS L 50ns Latch Hold Time tD H L 50ns Latch High Level Width t LW H 200ns FLM Setup Time t DS F 50ns FLM Hold Time tD H F 50ns SCP, LP Rise/Fall Time t r/t f 2 V tr Maximum 6.0MHz 50kHz SCP Din tCWH tCWL tDSD tf tDHD tPDO *1 Dout 25ns LP FLM 15ns www.nkk.com *2 tDSL *3 tLWH tr 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 LCD 36 x 24 Pushbutton BLOCK DIAGRAM & PIN CONFIGURATIONS 6 8 9 LP Pin No. 1 36 x 24 Dot Matrix LCD Panel seg1 seg36 Segment Driver CK 40bit Latch CK 40bit D Shift Register Q Din 4 Dout 2 SW 3 BL-LED (–) 13 BL-LED (–) GND SW 12 Timing Control Com24 7 FLM SCP Com1 5 IS15BAFP4CF Red/Green LED Backlight Black and White LCD Common Driver 10 D 24bit CK Shift Register 11 VLC VDD 1 BL-LED (+) Symbol Name Function SW Terminal of Switch Normally open 2 SW Terminal of Switch Normally open 3 BL-LED (–) Terminal of Backlight LED Green 4 Dout Data Output First Line Marker Input signal frame Latch Pulse Input display latch signal Input display shift clock 5 FLM 6 LP 7 SCP Serial Clock Pulse 8 Din Data Input 9 GND Ground 10 VDD Power 11 VLC Power 12 BL-LED (+) Terminal of Backlight LED Anode 13 BL-LED (–) Terminal of Backlight LED Red www.nkk.com 3 SmartSwitch TM Wide View LCD 36 x 24 Pushbutton LED SPECIFICATIONS Display Electrical Characteristics Items Symbols Supply Voltage LED Maximum 4.5 5.0 5.5 LCD Circuit VLC 7.1 7.3 7.5 H VI H 0.7V DD — VDD L VI L 0 — 0.3 VDD H VO H DO U T, I O H = 500 μ A VDD –0.5 — — L VO L DO U T, I O L = 500 μ A — — 0.5 Logic Circuit I DD fs c p = 1.0MHz — — 500 LCD Circuit I LC fL P = 2.4kHz VL C = 7.3V — 500 2,000 Output Voltage Symbols Forward Current Typical VDD LCD Items Minimum Logic Circuit Input Voltage Power Test Condition Test Condition LED Colors LED Absolute Maximum Ratings (Temperature at25°C) Standard Red/Green IF Standard 15mA Forward Voltage VF I F = Forward Current Ta = 25°C Current Reduction Rate ∆ I F (D C) Ta = 25°C above Red/Green Color Red Green Unicolor 1.9V 1.9V LED Overall Red Green 50mW 50mW 100mW –0.26mA/°C TYPICAL SWITCH DIMENSIONS (17.0) .669 See Pixel Detail (17.78) .700 See Standoff Detail (16.54) .651 13 (12.34) .486 12 (13.0) .512 (17.78) .700 (7.62) .300 (12.5) .492 4 (14.8) .583 (20.59) .811 3 (0.6) Typ .024 (18.5) .728 (23.13) .911 (10.5) .413 (2.5) .098 (12.5) .492 (1.25) Typ .049 (3.2) .126 (2.8) .110 (12.7) .500 (2.5) .098 Terminal numbers are not on the switch. 13x (0.8) ~ (1.0) Dia .031 .039 (17.78) .700 (0.440) .0173 (0.02) Typ .0008 (0.3) .012 (0.495) .0195 (0.6) .024 (12.5) .492 13 11 9 7 (0.75) Dia .030 (1.8) Dia .071 5 3 4 Standoff Detail www.nkk.com 2 8 6 4 1 (1.25) Typ .049 (2.5) .098 Pixel Detail 12 10 (12.7) .500 Footprint (7.62) .300 (17.78) .700 2x (0.9) Dia .035 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 for Switch: see Profile A in the Supplement section. Manual Soldering for Display: see Profile B 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