CS235 Cherry Semiconductor Corporation, CS235 Datasheet

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... The CS235 System Smoke Detector is a photo electric type with a pulsed infrared LED as the light source and a silicon photodiode as the light detector. The CS235 IC, along with passive external compo- nents, controls the system timing and signal processing. Low average current is attained by pulsing the system once every 10 seconds for 20 milliseconds ...

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Lead Temperature Soldering Wave Solder (through hole styles only) .....................................................................................10 sec. max, 260¡C peak Reflow (SMD styles only) ......................................................................................60 sec. max above 183¡C, 230¡C peak Storage Temperature Range ..................................................................................................................................-65¡C to 150¡C Electrical Characteristics: T PARAMETER Absolute Maximum Voltage (pin 3) ...

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PARAMETER Amplifier A2 DC Output (pin 6k½ 510½ .47µF Input Bias Current (pin 8) (Externally adjusted gain with R3 and R4. Unity DC gain) Voltage gain @ 3.5kHz (Externally adjusted gain with R3 ...

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Timing Diagram Out of Alarm Power Up 20ms 20ms Gate (Clock) 10ms 3.5KHz Oscillator/ LED Driver Comp. Ref. Comp. Ref. Level Detector Output Data Input (low) Alarm Enable (low) Preset Timing Diagrams 10 Sec. 20ms 3.5KHz Comp. Ref. Level 4 ...

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... CS235 LED 15 Driver R8 36W Status LED IR LED PGnd 4 1nF R12 A1 150k R9 Gain =20 270k R11 1nF 150k R12 R13 150k 150k 8 Application Diagram C3 R6 6.8nF 18k 14 13 Gate Oscillator Synchronous + Detector COMP 100K R4 C4 510W .47mF C5 .47mF 75k R1 Main 17 Power Timer 20M ...

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... REF: JEDEC MS-001 1.27 (.050) 0.40 (.016) REF: JEDEC MS-013 Ordering Information Part Number Description CS235GDW18 18L SO CS235GDWR18 18L SO (tape & reel) CS235GN18 18L PDIP Rev. 7/6/98 Package Specification D Thermal Data English R QJC Min Max Min R QJA 22 ...