CD4541

UTC CD4541 PROGRAMMABLE TIMER DESCRIPTION T he UTC C D4541 p rogrammable timer comprise a 16-stage binary counter, an integrated oscillator for use with an external capacitor and two resistors, output control logic, and a special power-on reset circuit. The counter divides the oscillator frequency by any of 4 digitally controlled division ratios. CMOS IC SOP-14 FEATURES *Operates at 2n frequency divider or as single transition timer *Increments on positive edge clock transitions *Wide supply voltage range: 3.0V ~ 15V *Built-in low power RC oscillator *Oscillator frequency range ~ DC to 100 kHz *External clock applied to Pin 3 can be used instead of oscillator 8 10 13 16 *Available division ratios 2 , 2 , 2 , or 2 *High noise immunity: 0.45 VDD (typ.) *Master reset totally independent of automatic reset operation *Automatic reset initializes all counters when power turns on *Q/Q select provides output logic level flexibility *High output drive min. one TTL load *Maximum input leakage 1μA at 15V over full temperature range DIP-14 *Pb-free plating product number: CD4541L PIN CONFIGURATION Rtc Ctc Rs N.C. AR MR Vss 1 2 3 4 5 6 7 14 13 12 11 10 9 8 VDD B A N.C. MODE Q/Q SELECT Q UTC UNISONIC TECHNOLOGIES www.unisonic.com.tw CO., LTD. 1 QW-R502-037,A UTC CD4541 TRUTH TABLE PIN 5 6 9 10 STATE 0 Auto Reset Operating Timer Operational Output Initially Low after Reset Single Cycle Mode 1 Auto Reset Disabled Master Reset On Output Initially High after Reset Recycle Mode CMOS IC DIVISION RATIO TABLE A 0 0 1 1 B 0 1 0 1 Number of Counter Stages n 13 10 8 16 Count 2n 8192 1024 256 65536 BLOCK DIAGRAM A 12 B 13 1 OF 3 MUX Rtc 1 Ctc 2 Rs 3 OSC RESET 8-STAGE 8 C COUNTER 2 RESET 210 213 216 B-STAGE C COUNTER RESET 8Q AUTO RESET 5 POWER-ON RESET 6 10 MODE VDD=Pin 14 Vss=Pin 7 MASTER RESET 9 Q/Q SELECT UTC UNISONIC TECHNOLOGIES www.unisonic.com.tw CO., LTD. 2 QW-R502-037,A UTC CD4541 ABSOLUTE MAXIMUM RATINGS (Note 1, 2) PARAMETER Supply Voltage Input Voltage DIP-14 SOP-14 Lead Temperature (soldering, 10 seconds) Storage Temperature Range Power Dissipation SYMBOL VDD VIN PD TL Tstg RATINGS -0.5 ~ +18 -0.5 ~ VDD+0.5 700 500 260 -65 ~ +150 CMOS IC UNIT V V mW ℃ ℃ RECOMMENDED OPERATING CONDITIONS (Note 2) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VDD 3 ~ 15 V Input Voltage VIN 0 ~ VDD V ℃ Operating Temperature Range Topr -40 ~ +85 Note 1: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. Except for “Operating Temperature Range” they are not meant to imply that the devices should be operated at these limits. The table of “Electrical Characteristics” provides conditions for actual device operation. Note 2: VSS=0V unless otherwise specified. DC ELECTRICAL CHARACTERISTICS (Note 2, Ta=25℃, unless otherwise noted.) TEST CONDITIONS VDD=5V, VIN=VDD or Vss VDD=10V, VIN=VDD or Vss Quiescent Device Current IDD VDD=15V, VIN=VDD or Vss VDD=5V VDD=10V, I IO I