XL555

XD555 DIP8 / XL555 SOP8 D Very Low Power Consumption D D D D D D D D D description − 1 mW Typ at VDD = 5 V Capable of Operation in Astable Mode CMOS Output Capable of Swinging Rail to Rail High Output-Current Capability − Sink 100 mA Typ − Source 10 mA Typ Output Fully Compatible With CMOS, TTL, and MOS Low Supply Current Reduces Spikes During Output Transitions Single-Supply Operation From 2 V to 15 V Functionally Interchangeable With the 555NE; Has Same Pinout ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015.2 Available in Q-Temp Automotive High Reliability Automotive Applications Configuration Control/Print Support Qualification to Automotive Standards The XD/XL555 is a monolithic timing circuit fabricated using the TI LinCMOS process. The timer is fully compatible with CMOS, TTL, and MOS logic and operates at frequencies up to 2 MHz. Because of its high input impedance, this device uses smaller timing capacitors than those used by the 555NE. As a result, more accurate time delays and oscillations are possible. Power consumption is low across the full range of power supply voltage. D, DB, JG, OR P PACKAGE (TOP VIEW) GND TRIG OUT RESET 1 8 2 7 3 6 4 5 VDD DISCH THRES CONT Like the 555NE, the XD/XL555 has a trigger level equal to approximately one-third of the supply voltage and a threshold level equal to approximately two-thirds of the supply voltage. These levels can be altered by use of the control voltage terminal (CONT). When the trigger input (TRIG) falls below the trigger level, the flip-flop is set and the output goes high. If TRIG is above the trigger level and the threshold input (THRES) is above the threshold level, the flip-flop is reset and the output is low. The reset input (RESET) can override all other inputs and can be used to initiate a new timing cycle. If RESET is low, the flip-flop is reset and the output is low. Whenever the output is low, a low-impedance path is provided between the discharge terminal (DISCH) and GND. All unused inputs should be tied to an appropriate logic level to prevent false triggering. While the CMOS output is capable of sinking over 100 mA and sourcing over 10 mA, the XD/XL555 exhibits greatly reduced supply-current spikes during output transitions. This minimizes the need for the large decoupling capacitors required by the 555NE. 1 XD555 DIP8 / XL555 SOP8 description (continued) The XD/XL555 is characterized for operation from 0 °C to 70°C. The XD/XL555 is characterized for operation from −40°C to 85°C. The XD/XL555 is characterized for operation over the automotive temperature range of −40°C to 125°C. The XD/XL555 is characterized for operation over the full military temperature range of −55°C to 125°C. AVAILABLE OPTIONS† PACKAGED DEVICES TA VDD RANGE 0°C to 70°C 2 V to 15 V −40°C to 85°C 3 V to 15 V −40°C to 125°C 5 V to 15 V −55°C to 125°C 5 V to 15 V SMALL OUTLINE (D)‡ SSOP (DB)‡ CHIP CARRIER (FK) CERAMIC DIP (JG) PLASTIC DIP (P) TSSOP (PW)‡ — — — XD555 — — — — XD555 — — — — — — — — — XD555 — XL555 FUNCTION TABLE RESET VOLTAGE‡ TRIGGER VOLTAGE‡ THRESHOLD VOLTAGE‡ OUTPUT DISCHARGE SWITCH On MAX MAX >MAX >MAX L On >MAX >MAX