DM54L93 Datasheet | National Semiconductor

Description Each of these monolithic counters contains four masterslave flip-flops and additional gating to provide a divide-bytwo counter and a three-stage binary counter for which the count cycle length is divide-by-eight To use their maximum count length (decade divide-bytwelve or four-bit binary) the B input is connected to the QA output The input count pulses are applied to input A and the outputs are as described in the appropriate truth table Features Typical power dissipation 16 m W Count frequency 15 MHz Connection Diagram Dual-In-Line Package Function Tables COUNT SEQUENCE (See Note A) Count QD 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 L L L L L L L L H H H H H H H H Output QC L L L L H H H H L L L L H H H H QB L L H H L L H H L L H H L L H H QA L H L H L H L H L H L H L H L H TL F 6637 - 1 Order Number DM54L93J or DM54L93W See NS Package Number J14A or W14B RESET COUNT TRUTH TABLE (Note B) Reset Inputs R0(1) H L X R0(2) H X L QD L Output QC QB QA L L L COUNT COUNT Note A Output QA is connected to input B Note B H e High Level L e Low Level X e Don’t Care C1995 National Semiconductor Corporation TL F 6637 RRD-B30M105 Printed in U S A Absolute Maximum Ratings (Note) If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage 8V Input Voltage 5 5V Operating Free Air Temperature Range b 55 C to a 125 C DM54L b 65 C to a 150 C Storage Temperature Range Note The ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed The device should not be operated at these limits The parametric values defined in the ‘‘Electrical Characteristics’’ table are not guaranteed at the absolute maximum ratings The ‘‘Remended Operating Conditions’’ table will define the conditions for actual device operation Remended Operating Conditions Symbol VCC VIH VIL IOH IOL f CLK t W Parameter Min Supply Voltage High Level...