NTE926 Integrated Circuit Quad Timer Description: The NTE926 quad timer is a monolithic timing device which can be used to produce four independent timing functions. The NTE926 output sinks current. This highly stable, general purpose controller can be used in a monostable mode to produce accurate time delays–from microseconds to hours. In the time delay mode of operation, the time is precisely controlled by one external resistor and one capacitor. A stable operation can be achieved by using two of the four timer sections. The four timer section in the NTE926 are edge–triggered, therefore, when connected in tandem for sequential timing applications, no coupling capacitors are required. Output current capability of 100mA is provided in both devices. Features: D 100mA Output Current per Section D Edge–triggered (No Coupling Capacitor) D Output Independent of Trigger Conditions D Wide Supply Voltage Range 4.5V to 18V D Timer Intervals from Microseconds to Hours D Time Period Equals RC Applications: D Sequential Timing D Time Delay Generation D Precision Timing D Quad One–Shot Absolute Maximum Ratings: Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +16V Maximum Power Dissipation (TA = +25°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1450mW Derate Above 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.6mW/°C Operating Ambient Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to +70°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65 to +150°C Lead Soldering Temperature (10 Sec Max), TSOLD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C DC & AC Electrical Characteristics: (TA = +25°C, VCC = +5V, unless otherwise specified) Parameter Symbol Min Typ Max Unit 4.5 – 16 V – 16 36 mA Initial Accuracy – ±2 5 % Drift with Temperature – 30 150 ppm/°C Drift with Supply Voltage – 0.1 0.9 %/V 0.8 – 2.4 V – 5 100 µA Supply Voltage VCC Supply Current ICC Timing Accuracy (t = RC) Test Conditions VCC = Reset = 15V R = 2kΩ to 100kΩ, C = 1µF Trigger Voltage VCC = 15V, Note 1 Trigger Current Trigger = 0V Reset Voltage Note 2 0.8 – 2.4 V Reset Current Reset – 50 500 µA Threshold Voltage – 0.63 – x VCC Threshold Leakage – 15 – nA – 0.1 0.4 V – 1.0 2.0 V – 10 500 nA – 1.0 – µS Output Voltage VOUT IL = 10mA, Note 3 Output Leakage Propagation Delay tPD Rise Time of Output tR IL = 100mA – 100 – nS Fall Time of Output tF IL = 100mA – 100 – nS Note 1. The trigger functions only on the falling edge of the trigger pulse only after previously being high. After reset, the trigger must be brought high and then low to implement triggering. Note 2. For reset below 0.8V, outputs set low and trigger inhibited. For reset above 2.4V, trigger enabled. Note 3. The NTE926 output structure is open–collector which requires a pull–up resistor to VCC to sink current. The output is normally low sinking current. Pin Connection Diagram Output A 1 16 Output D Timing A 2 Trigger A 3 15 Timing D 14 Trigger D Control Voltage 4 VCC 5 16 .260 (6.6) Max 1 13 Reset 11 Trigger C Timing B 7 10 Timing C Output B 8 9 Output C 8 .300 (7.62) .785 (19.9) Max 12 GND Trigger B 6 9 .200 (5.08) Max .245 (6.22) Min .100 (2.54) .700 (17.7)