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MC14541B Fiches technique(PDF) 1 Page - ON Semiconductor |
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MC14541B Fiches technique(HTML) 1 Page - ON Semiconductor |
1 / 8 page © Semiconductor Components Industries, LLC, 2000 March, 2000 – Rev. 6 1 Publication Order Number: MC14541B/D MC14541B Programmable Timer The MC14541B programmable timer consists of a 16–stage binary counter, an integrated oscillator for use with an external capacitor and two resistors, an automatic power–on reset circuit, and output control logic. Timing is initialized by turning on power, whereupon the power–on reset is enabled and initializes the counter, within the specified VDD range. With the power already on, an external reset pulse can be applied. Upon release of the initial reset command, the oscillator will oscillate with a frequency determined by the external RC network. The 16–stage counter divides the oscillator frequency (fosc) with the nth stage frequency being fosc/2n. • Available Outputs 28, 210, 213 or 216 • Increments on Positive Edge Clock Transitions • Built–in Low Power RC Oscillator (± 2% accuracy over temperature range and ± 20% supply and ± 3% over processing at < 10 kHz) • Oscillator May Be Bypassed if External Clock Is Available (Apply external clock to Pin 3) • External Master Reset Totally Independent of Automatic Reset Operation • Operates as 2n Frequency Divider or Single Transition Timer • Q/Q Select Provides Output Logic Level Flexibility • Reset (auto or master) Disables Oscillator During Resetting to Provide No Active Power Dissipation • Clock Conditioning Circuit Permits Operation with Very Slow Clock Rise and Fall Times • Automatic Reset Initializes All Counters On Power Up • Supply Voltage Range = 3.0 Vdc to 18 Vdc with Auto Reset Supply Voltage Range = Disabled (Pin 5 = VDD) Supply Voltage Range = 8.5 Vdc to 18 Vdc with Auto Reset Supply Voltage Range = Enabled (Pin 5 = VSS) MAXIMUM RATINGS (Voltages Referenced to VSS) (Note 2.) Symbol Parameter Value Unit VDD DC Supply Voltage Range – 0.5 to +18.0 V Vin, Vout Input or Output Voltage Range (DC or Transient) – 0.5 to VDD + 0.5 V Iin Input Current (DC or Transient) ±10 (per Pin) mA Iout Output Current (DC or Transient) ±45 (per Pin) mA PD Power Dissipation, per Package (Note 3.) 500 mW TA Ambient Temperature Range – 55 to +125 °C Tstg Storage Temperature Range – 65 to +150 °C TL Lead Temperature (8–Second Soldering) 260 °C 2. Maximum Ratings are those values beyond which damage to the device may occur. 3. Temperature Derating: Plastic “P and D/DW” Packages: – 7.0 mW/ _C From 65_C To 125_C http://onsemi.com A = Assembly Location WL or L = Wafer Lot YY or Y = Year WW or W = Work Week Device Package Shipping ORDERING INFORMATION MC14541BCP PDIP–14 2000/Box MC14541BD SOIC–14 55/Rail MC14541BDR2 SOIC–14 2500/Tape & Reel 1. For ordering information on the EIAJ version of the SOIC packages, please contact your local ON Semiconductor representative. MC14541BDTR2 TSSOP–14 2500/Tape & Reel MC14541BDT TSSOP–14 96/Rail MC14541BF SOEIAJ–14 See Note 1. This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, precautions must be taken to avoid ap- plications of any voltage higher than maximum rated voltages to this high–impedance circuit. For proper operation, Vin and Vout should be constrained to the range VSS v (Vin or Vout) v VDD. Unused inputs must always be tied to an appropriate logic voltage level (e.g., either VSS or VDD). Unused out- puts must be left open. MC14541BFEL SOEIAJ–14 See Note 1. MARKING DIAGRAMS 1 14 PDIP–14 P SUFFIX CASE 646 MC14541BCP AWLYYWW SOIC–14 D SUFFIX CASE 751A TSSOP–14 DT SUFFIX CASE 948G 1 14 14541B AWLYWW 14 541B ALYW 1 14 SOEIAJ–14 F SUFFIX CASE 965 1 14 MC14541B AWLYWW |
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