DM54L93 Decade, Divide-by-12, and Binary Counters General Description Features 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. Y Connection Diagram Function Tables Y Typical power dissipation 16 mW Count frequency 15 MHz COUNT SEQUENCE (See Note A) Dual-In-Line Package Output Count 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 TL/F/6637 – 1 Order Number DM54L93J or DM54L93W See NS Package Number J14A or W14B QD QC QB QA L L L L L L L L H H H H H H H H L L L L H H H H L L L L H H H H L L H H L L H H L L H H L L H H L H L H L H L H L H L H L H L H RESET/COUNT TRUTH TABLE (Note B) Reset Inputs Output R0(1) R0(2) QD H L X H X L L QC QB L L COUNT COUNT QA L 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. DM54L93 Decade, Divide-by-12, and Binary Counters June 1989 Absolute Maximum Ratings (Note) 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 ‘‘Recommended Operating Conditions’’ table will define the conditions for actual device operation. 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 Recommended Operating Conditions Symbol DM54L93 Parameter VCC Supply Voltage VIH High Level Input Voltage VIL Low Level Input Voltage IOH High Level Output Current IOL Low Level Output Current fCLK Clock Frequency (Note 5) tW Pulse Width (Note 5) Units Min Nom Max 4.5 5 5.5 V 2 V 0 A 90 B 90 Reset 200 tREL Reset Release time (Note 5) 200 TA Free Air Operating Temperature b 55 0.7 V b 0.2 mA 2 mA 6 MHz ns ns 125 §C Electrical Characteristics over recommended operating free air temperature (unless otherwise noted) Symbol Parameter Conditions Min Typ (Note 1) 2.4 3.4 VOH High Level Output Voltage VCC e Min, IOH e Max VIL e Max, VIH e Min VOL Low Level Output Voltage VCC e Min, IOL e Max VIL e Max, VIH e Min (Note 4) Input Current @ Max Input Voltage VCC e Max VI e 5.5V II IIH IIL High Level Input Current Low Level Input Current VCC e Max VI e 2.4V VCC e Max VI e 0.3V IOS Short Circuit Output Current VCC e Max (Note 2) ICC Supply Current VCC e Max (Note 3) Max V 0.15 0.3 Reset 0.1 A 0.2 B 0.2 Reset 10 A 20 B 20 Reset b 0.18 A b 0.36 B b 0.36 b3 Units V mA mA mA b 15 mA 5.5 mA Note 1: All typicals are at VCC e 5V, TA e 25§ C. Note 2: Not more than one output should be shorted at a time. Note 3: ICC is measured with all outputs open, R0 inputs grounded following momentary connection to 4.5V and all other inputs grounded. Note 4: QA outputs are tested at IOL e max plus the limit value of IIL for the B input. This permits driving the B input while maintaining full fan-out capability. Note 5: TA e 25§ C and VCC e 5V. 2 Switching Characteristics at VCC e 5V and TA e 25§ C (See Section 1 for Test Waveforms and Output Load) Parameter Symbol From (Input) To (Output) RL e 4 kX, CL e 50 pF Min Units Max fMAX Maximum Clock Frequency A to QA tPLH Propagation Delay Time Low to High Level Output 6 MHz A to QD 400 ns tPHL Propagation Delay Time High to Low Level Output A to QD 400 ns Logic Diagram TL/F/6637 – 2 The J and K inputs shown without connection are for reference only and are functionally at a high level. 3 DM54L93 Decade, Divide-by-12, and Binary Counters Physical Dimensions inches (millimeters) 14-Lead Ceramic Dual-In-Line Package (J) Order Number DM54L93J NS Package Number J14A 14-Lead Ceramic Flat Package (W) Order Number DM54L93W NS Package Number W14B LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. 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