LSI/CSI UL ® LS6301 LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747 (631) 271-0400 FAX (631) 271-0405 A3800 AC LINE FREQUENCY TIMER FEATURES: • Selectable Timing Intervals • Internal Voltage Regulator • Schmitt Trigger on all inputs for high noise immunity • Power-On-Reset • Built-in discharge when power is removed • Output to drive an SCR connected to load • Output to flash an indicator when timeout has occurred • LS6301 (DIP); LS6301-S (SOIC) - See Figure 1 ELECTRICAL CHARACTERISTICS: 1 OUT 1 2 OUT 2 3 V SS (+V) 4 8 V DD (-V) 7 AC IN 6 A 5 C FIGURE 1 The C input mode pin contains an internal pull up resistor for directly connecting to a SPST switch. By tying either the A or B input, or both, to the C input and using the C input as the timeout selection, a maximum number of timeout combinations can be achieved. Output 1 is normally low and goes high at the end of the selected timing interval. It produces a 1.85Hz output square wave signal and is normally used to drive an SCR with a load such as a thermal relay or a neon indicator lamp. Output 2 is normally high and goes low at the end of the selected timing interval. The output drives an SCR whose load could be a relay, resistance heater or some other device. The load would be turned off at the end of the timing interval. Operating Temperature 0°C to 85°C Power-On-Reset Hysteresis Regulating Voltage Timing Mode Pins: Pull-up current (Pin 5 only) Pos. Threshold Voltage (VREG = 5.5V) Neg. Threshold Voltage (VREG = 5.5V) AC Input Pin Maximum frequency Input Current Positive Threshold Voltage (VREG = 5.5V) Negative Threshold Voltage (VREG = 5.5V) Hysteresis Output 1 (Pin 2); Output 2 (Pin 3) Source Current: Vo = 0.4V; TA = 0°C to 85°C Sink Current: Vo = 0.4V; TA = 0°C to 85°C 6301-060804-1 B LS6301 TABLE 1. TIMING INTERVALS (60 Hz INPUT) A INPUT B INPUT C INPUT TIMING I NTERVAL Vss Vss Vss 15 Minutes 2 Minutes Vss Vss VDD Vss 30 Minutes Vss VDD VDD 45 Minutes Vss VDD Vss Vss 30 Seconds VDD Vss VDD 15 Minutes VDD VDD Vss 1 Hour VDD VDD VDD 2 Hours VDD PIN ASSIGNMENT - TOP VIEW LSI DESCRIPTION: The circuit operates by counting AC power line cycles. When the selected timeout occurs, the circuit will switch an external power device. Selectable timing intervals using 3 mode pins are indicated in Table 1. The circuit contains a Power-On-Reset (POR) to zero out all the timing counters upon power-up. A positive or negative transition of any of the A, B or C timing mode input pins will cause the timer to reset and begin again. Once time-out is achieved, it remains latched until a mode pin transition occurs or POR occurs. June 2004 Min - Typical 3.0 0.8 5.5 Max - Unit V V V 100 - 4.9 - uA V V 1.0 ± 10 0.7 2.0 - 4.9 - MHz mA V V V 150 3.8 - 950 - uA mA 0.7 MAXIMUM RATINGS: PARAMETER SYMBOL Storage Temperature Operating Temperature DC Supply Voltage Voltage at any input TSTG TA (VDD - VSS) VIN VALUE UNIT -55 to +150 0 to +85 +7.5 VSS - 0.5 to VDD + 0.5 °C °C V V R1 4.7MΩ R1 18KΩ 7 VDD AC IN 6 A 1N4004 NORMALLY OFF LOAD C2 220pF 8 D2 NORMALLY ON LOAD 5 C C1 D1 1N4004 220pF LS6301 C3 COUNTER + 47uF ±20% 6.3V AC LINE VOLTAGE (115, 60Hz) DECODER R2 18KΩ 2N5064 B 1 OUT 1 2 OUT 2 GND 3 4 Q2 2N5064 NEON BULB FIGURE 2. TYPICAL APPLICATION CIRCUIT With SW in the open position, the timeout is set to 15 minutes. In the closed position, the time-out is set to 30 seconds. Any change in the switch (SW) position will cause the time-out to reset and begin again. At the end of the time-out the neon bulb will flash at a 1.875Hz rate and the normally on load will be turned off. The information included herein is believed to be accurate and reliable. However, LSI Computer Systems, Inc. assumes no responsibilities for inaccuracies, nor for any infringements of patent rights of others which may result from its use. 6301-060804-2