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| SEMICONDUCTOR CD54AC193/3A CD54ACT193/3A Presettable Synchronous 4-Bit Binary Up/Down Counter with Reset Functional Diagram BINARY PRESET P0 15 ASYNC PARALLEL LOAD ENABLE PL 11 P1 1 P2 10 P3 9 3 2 6 7 CLOCK UP 5 Q0 Q1 Q2 Q3 BINARY OUTPUTS June 1997 COMPLETE DATA SHEET COMING SOON! Description The CD54AC193/3A and CD54ACT193/3A are up/down binary counters with separate up/down clocks. These devices utilize the Harris Advanced CMOS Logic technology. Presetting the counter to the number on preset data inputs (P0-P3) is accomplished by a LOW asynchronous parallel load input (PL). The counter is incremented on the LOW-to-HIGH transition of the Clock-Up input (and a HIGH level on the Clock-Down input) and decremented on the LOW-to-HIGH transition of the Clock-Down input (and a HIGH level on the Clock-Up input). A HIGH level on the Reset input overrides any other input to clear the counter to its zero state. The TCU (carry) output goes LOW half a clock period before the zero count is reached and returns to a HIGH level at the zero count. The TCD (borrow) output in the count down mode likewise goes LOW half a clock period before the maximum count (15 counts) and returns to HIGH at the maximum count. Cascading is effected by connecting the TCU and TCD outputs of a less significant counter to the Clock-Up and Clock-Down inputs, respectively, of the next most significant counter. The CD54AC193/3A and CD54ACT193/3A are supplied in 16-lead dual-in-line ceramic packages (F suffix).s MASTER 14 RESET 12 TERMINAL COUNT UP CLOCK DOWN 4 13 TERMINAL COUNT DOWN ACT INPUT LOAD TABLE INPUT P0 - P3, PL MR, CPU, CPD NOTE: 1. Unit load is ICC limit specified in DC Electrical Specifications Table, e.g., 2.4mA Max at +25oC. UNIT LOAD (NOTE 1) 0.75 0.85 Absolute Maximum Ratings DC Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +6V DC Input Diode Current, IIK For VI < -0.5V or VI > VCC + 0.5V . . . . . . . . . . . . . . . . . . . . . .20mA DC Output Diode Current, IOK For VO < -0.5V or VO > VCC + 0.5V . . . . . . . . . . . . . . . . . . . . .50mA DC Output Source or Sink Current, Per Output Pin, IO For VO > -0.5V or VO < VCC + 0.5V . . . . . . . . . . . . . . . . . . . . .50mA DC VCC or GND Current, ICC or IGND For Up to 4 Outputs Per Device, Add 25mA For Each Additional Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100mA Power Dissipation Per Package, PD TA = -55oC to +100oC (Package F) . . . . . . . . . . . . . . . . . . 500mW TA = +100oC to +125oC (Package F) . . . . . . . . Derate Linearly at 8mW/ oC to 300mW Operating Temperature Range, TA Package Type F . . . . . . . . . . . . . . . . . . . . . . . . . . -55oC to +125oC Storage Temperature, TSTG . . . . . . . . . . . . . . . . . . -65oC to +150oC Lead Temperature (During Soldering) At Distance 1/16in. 1/32in. (1.59mm 0.79mm) From Case For 10s Max . . . . . . . . . . . . . . . . . . . . . . . . . . +265oC Unit Inserted Into a PC Board (Min Thickness 1/16in., 1.59mm) With Solder Contacting Lead Tips Only. . . . . . . . . . . . . . . +300oC CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Recommended Operating Conditions Supply Voltage Range, VCC Unless Otherwise Specified, All Voltages Referenced to GND TA = Full Package Temperature Range CD54AC Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.5V to 5.5V CD54ACT Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.5V to 5.5V DC Input or Output Voltage, VI, VO . . . . . . . . . . . . . . . . . . 0V to VCC Operating Temperature, TA . . . . . . . . . . . . . . . . . . . -55oC to +125oC Input Rise and Fall Slew Rate, dt/dv at 1.5V to 3V (AC Types) . . . . . . . . . . . . . . . . . . . 0ns/V to 50ns/V at 3.6V to 5.5V (AC Types) . . . . . . . . . . . . . . . . . 0ns/V to 20ns/V at 4.5V to 5.5V (AC Types) . . . . . . . . . . . . . . . . . 0ns/V to 10ns/V CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper I.C. Handling Procedures. Copyright (c) Harris Corporation 1994 File Number 3897 1 |
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