NTE978/NTE978C/NTE978SM Integrated Circuit Dual Timer Description: The NTE978 series dual timing circuit is a highly stable controller capable of producing accurate time delays or oscillation. The NTE978 is a dual NTE955. Timing is provided by an external resistor and capacitor for each timing function. The two timers operate independently of each other sharing only V and GND. The circuits may be triggered and reset on falling waveforms. The output structures CC may sink or source 200mA. Features: Direct Replacement for 556 Timers Replaces Two 555 Timers (NTE955M) Timing from Microseconds through Hours Operates in both Astable and Monostable Modes Adjustable Duty Cycle Output can Source or Sink 200mA Output and Supply TTL Compatible Temperature Stability better than 0.005% per C Normally On and Normally Off Output Available in Three Types: NTE978 14 Lead DIP NTE978C 14 Lead DIP (CMOS) NTE978SM SOIC 14 (Surface Mount) Applications: Precision Timing Pulse Generation Sequential Timing Time Delay Generation Pulse Width Modulation Pulse Position Modulation Linear Ramp Generator Absolute Maximum Ratings: Supply Voltage, V ............................................................... +18V CC Power Dissipation (Note 1), P .................................................. 1620mW D Operating Temperature Range, T ............................................. 0 to +70 C A Storage Temperature Range, T .......................................... 65 to +150 C stg Lead Temperature (During Soldering, 10sec Max), T ................................ +260 C L Note 1. For operating at elevated temperatures the device must be derated based on a +150 C maximum junction temperature and a thermal resistance of +77 C/W for NTE978 and NTE978C and +110 C/W for NTE978SM. Rev. 614Electrical Characteristics: (T = +25 C, V = +5V to +15V, unless otherwise specified) A CC Parameter Symbol Test Conditions Min Typ Max Unit Supply Voltage V 4.5 16 V CC Supply Current (Each Timer Section) I Low State, 3 6 mA V = 5V, R = CC CC L Note 2 V = 15V, R = 10 14 mA CC L Timing Error, Monostable Initial Accuracy 0.75 % R = 1k to 100k , C = 0.1 F, Drift with Temperature A 50 ppm/ C Note 3 Accuracy over Temperature 1.5 % Drift with Supply 0.1 %/V Timing Error, Astable Initial Accuracy 2.25 % R , R = 1k to 100k , C = 0.1 F, A B Drift with Temperature 150 ppm/ C Note 3 Accuracy over Temperature 3.0 % Drift with Supply 0.30 %/V Trigger Voltage V V = 15V 4.5 5.0 5.5 V T CC V = 5V 1.25 1.67 2.0 V CC Trigger Current I 0.2 1.0 A T Reset Voltage V Note 4 0.4 0.5 1.0 V R Reset Current I 0.1 0.6 mA R Threshold Current I V = VControl, Note 5 0.03 0.1 A TH TH V = 11.2V 250 nA TH Control Voltage Level and V V = 15V 9 10 11 V CL CC Threshold Voltage V TH V = 5V 2.6 3.33 4.0 V CC Pin1, Pin13 Leakage Output High I 1 100 nA dis Pin1, Pin13 Saturation Output Low Note 6 V = 15V, I = 15mA 180 300 mV CC V = 4.5V, I = 4.5mA 80 200 mV CC Output Voltage Drop (Low) V V = 15V I = 10mA 0.1 0.25 V OL CC SINK I = 50mA 0.4 0.75 V SINK I = 100mA 2.0 2.75 V SINK I = 200mA 2.5 V SINK V = 5V I = 5mA 0.25 0.35 V CC SINK Output Voltage Drop (High) V V = 15V I = 200mA 12.5 V OH CC SOURCE I = 100mA 12.75 13.3 V SOURCE V = 5V 2.75 3.3 V CC Rise Time of Output t 100 ns OLH Fall Time of Output t 100 ns OHL Matching Characteristics Initial Timing Accuracy 0.1 2.0 % Note 7 Timing Druft with Temperature 10 ppm/ C Drift with Supply Voltage 0.2 0.5 %/V