TS555 Low power single CMOS timer Features Very low power consumption: 110 A typ at V = 5 V CC 90 a typ at V = 3 V CC High maximum astable frequency of 2.7 MHz N Pin-to-pin functionally-compatible with bipolar DIP8 NE555 (Plastic package) Wide voltage range: +2 V to +16 V Supply current spikes reduced during output transitions 12 High input impedance: 10 Output compatible with TTL, CMOS and logic D MOS SO8 (Plastic micropackage) Description The TS555 is a single CMOS timer with a very low consumption: (I TS555 = 110 A at V = +5 V versus cc(TYP) CC P I NE555 = 3 mA), cc(TYP) TSSOP8 and high frequency: (Thin shrink small outline package) (f TS555 = 2.7 MHz versus f(max.) f NE555 = 0.1 MHz). (max) Timing remains accurate in both monostable and astable mode. The TS555 provides reduced supply current Pin connections spikes during output transitions, which enable the (top view) use of lower decoupling capacitors compared to those required by bipolar NE555. 12 With the high input impedance (10 ), timing GND 1 8 V CC capacitors can also be minimized. Trigger 2 7 Discharge Output 3 6 Threshold Control Reset 4 5 Voltage November 2008 Rev 2 1/20 www.st.com 20Absolute maximum ratings and operating conditions TS555 1 Absolute maximum ratings and operating conditions Table 1. Absolute maximum ratings Symbol Parameter Value Unit V Supply voltage +18 V CC I Output current 100 mA OUT Thermal resistance junction to ambient (1) DIP8 85 R C/W thja (2) SO8 125 (2) TSSOP8 120 Thermal resistance junction to case (1) DIP8 41 R C/W thjc (2) SO8 40 (2) TSSOP8 37 T Junction temperature +150 C j T Storage temperature range -65 to +150 C stg (3) Human body model (HBM) 1500 (4) ESD Machine model (MM) 200 V (5) Charged device model (CDM) 1000 1. Short-circuits can cause excessive heating. These values are typical and specified for a single layer PCB. 2. Short-circuits can cause excessive heating. These values are typical and specified for a four layers PCB. 3. Human body model: a 100 pF capacitor is charged to the specified voltage, then discharged through a 1.5k resistor between two pins of the device. This is done for all couples of connected pin combinations while the other pins are floating. 4. Machine model: a 200 pF capacitor is charged to the specified voltage, then discharged directly between two pins of the device with no external series resistor (internal resistor < 5 ). This is done for all couples of connected pin combinations while the other pins remain floating. 5. Charged device model: all pins plus package are charged together to the specified voltage and then discharged directly to the ground. Table 2. Operating conditions Symbol Parameter Value Unit V Supply voltage 2 to 16 V CC Output sink current 10 I mA OUT Output source current 50 Operating free air temperature range TS555C 0 to +70 T C oper TS555I -40 to +125 TS555M -55 to +125 2/20