9316DMQB

9316 DM9316 Synchronous 4-Bit Counters June 1989 9316 DM9316 Synchronous 4-Bit Counters General Description These synchronous presettable counters feature an internal carry look-ahead for application in high-speed counting designs The 9316 is a 4-bit binary counter The carry output is decoded by means of a NOR gate thus preventing spikes during the normal counting mode of operation Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when so instructed by the count-enables inputs and internal gating This mode of operating eliminates the output counting spikes which are normally associated with asynchronous (ripple clock) counters A buffered clock input triggers the four flip-flops on the rising (positive-going) edge of the clock input waveform These counters are fully programmable that is the outputs may be preset to either level As presetting is synchronous setting up a low level at the load input disables the counter and causes the outputs to agree with the setup data after the next clock pulse regardless of the levels of the enable input Low-to-high transitions at the load input are perfectly acceptable regardless of the logic levels on the clock or enable inputs The clear function is asynchronous and a low level at the clear input sets of the flip-flop outputs low regardless of the levels of clock load or enable inputs The carry look-ahead circuitry provides for cascading counters for n-bit synchronous applications without additional gating Instrumental in accomplishing this function are two count-enable inputs and a ripple carry output Both countenable inputs (P and T) must be high to count and input T is fed-forward to enable the ripple carry output The ripple carry output thus enabled will produce a high-level output pulse with a duration approximately equal to the high-level portion of the QA output This high-level overflow ripple carry pulse can be used to enable successive cascaded stages Highto-low level transitions at the enable P or T inputs may occur regardless of the logic level in the clock Features Y Y Y Y Y Y Y Y Internal look-ahead for fast counting Carry output for n-bit cascading Synchronous counting Load control line Diode-clamped inputs Typical clock frequency 35 MHz Pin-for-pin replacements popular 54 74 counters 5416A 7416A (binary) Alternate Military Aerospace device (9316) is available Contact a National Semiconductor Sales Office Distributor for specifications Connection Diagram Dual-In-Line Package TL F 6606 – 1 Order Number 9316DMQB 9316FMQB DM9316J DM9316W or DM9316N See NS Package Number J16A N16E or W16A C1995 National Semiconductor Corporation TL F 6606 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 7V Input Voltage 5 5V Operating Free Air Temperature Range b 55 C to a 125 C Military Commercial 0 C to a 70 C Storage Temperature Range b 65 C to a 150 C 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 Recommended Operating Conditions Symbol VCC VIH VIL IOH IOL fCLK tW tSU Parameter Supply Voltage High Level Input Voltage Low Level Input Voltage High Level Output Current Low Level Output Current Clock Frequency (Note 6) Pulse Width Clock (Note 6) Clear Setup Time (Note 6) Data Enable P Load Clear Any Hold Time (Notes 1 6) Free Air Operating Temperature Min 45 2 Military Nom 5 Max 55 08 b0 8 Commercial Min 4 75 2 Nom 5 Max 5 25 08 b0 8 Units V V V mA mA MHz ns 0 25 20 20 20 25 20 0 b 55 16 25 0 25 20 20 20 25 20 0 16 25 ns tH TA ns 70 C 125 0 Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol VI VOH VOL II IIH Parameter Input Clamp Voltage High Level Output Voltage Low Level Output Voltage Input Current Max Input Voltage High Level Input Current Low Level Input Current Short Circuit Output Current Supply Current with Outputs High Supply Current with Outputs Low Conditions VCC e Min II e b12 mA VCC e Min IOH e Max VIL e Max VIH e Min VCC e Min IOL e Max VIH e Min VIL e Max VCC e Max VI e 5 5V VCC e Max VI e 2 4 V VCC e Max VI e 0 4V VCC e Max (Note 3) VCC e Max (Note 4) VCC e Max (Note 5) Clock Enable T Other Clock Enable T Other MIL COM MIL COM MIL COM Min Typ (Note 2) Max b1 5 Units V V 24 34 02 04 1 80 80 40 b3 2 b3 2 b1 6 V mA mA IIL mA IOS ICCH ICCL b 20 b 18 b 57 b 57 mA mA mA 59 59 63 63 85 94 91 101 Note 1 The minimum HOLD time is as specified or as long as the CLOCK input takes to rise from 0 8V to 2V whichever is longer Note 2 All typicals are at VCC e 5V TA e 25 C Note 3 Not more than one output should be shorted at a time Note 4 ICCH is measured with the LOAD input high then again with the LOAD input low with all other inputs high and all outputs open Note 5 ICCL is measured with the CLOCK input high then again with the CLOCK input low with all other inputs low and all outputs open Note 6 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) Symbol fMAX tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL tPHL Parameter Maximum Clock Frequency Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output Propagation Delay Time High to Low Level Output Clock to RC Clock to RC Clock to Q Clock to Q Clock to Q Clock to Q ENT to RC ENT to RC Clear to Q From (Input) To (Output) RL e 400X CL e 15 pF Min 25 27 24 20 23 21 25 15 16 36 Max MHz ns ns ns ns ns ns ns ns ns Units 3 Logic Diagram 9316 TL F 6606 – 2 4 Timing Diagram 9316 Synchronous Binary Counters Typical Clear Preset Count and Inhibit Sequences TL F 6606 – 3 Sequence (1) Clear outputs to zero (2) Preset to binary twelve (3) Count to thirteen fourteen fifteen zero one and two (4) Inhibit 5 Parameter Measurement Information Switching Time Waveforms TL F 6606 – 4 Note A The input pulses are supplied by a generator having the following characteristics PRR s 1 MHz duty cycle s 50% ZOUT Vary PRR to measure fMAX Note B Outputs QD and carry are tested at tn Note C VREF e 1 5V a 16 50X tr s 10 ns tf s 10 ns for 9316 8316 where tn is the bit time when all outputs are low 6 Parameter Measurement Information (Continued) Switching Time Waveforms TL F 6606 – 5 Note A The input pulses are supplied by generators having the following characteristics PRR s 1 MHz duty cycle s 50% ZOUT Note B Enable P and Enable T setup times are measured at tn Note C VREF e 1 5V a 16 50X tr s 10 ns tf s 10 ns for 8316 9316 7 8 Physical Dimensions inches (millimeters) 16-Lead Ceramic Dual-In-Line Package (J) Order Number 9316DMQB or DM9316J NS Package Number J16A 16-Lead Molded Dual-In-Line Package (N) Order Number DM9316N NS Package Number N16E 9 9316 DM9316 Synchronous 4-Bit Counters Physical Dimensions inches (millimeters) (Continued) 16-Lead Ceramic Flat Package (W) Order Number 9316FMQB or DM9316W NS Package Number W16A 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 As used herein 1 Life support devices or systems are devices or systems which (a) are intended for surgical implant into the body or (b) support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in a significant injury to the user National Semiconductor Corporation 1111 West Bardin Road Arlington TX 76017 Tel 1(800) 272-9959 Fax 1(800) 737-7018 2 A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system or to affect its safety or effectiveness National Semiconductor Europe Fax (a49) 0-180-530 85 86 Email cnjwge tevm2 nsc com Deutsch Tel (a49) 0-180-530 85 85 English Tel (a49) 0-180-532 78 32 Fran ais Tel (a49) 0-180-532 93 58 Italiano Tel (a49) 0-180-534 16 80 National Semiconductor Hong Kong Ltd 13th Floor Straight Block Ocean Centre 5 Canton Rd Tsimshatsui Kowloon Hong Kong Tel (852) 2737-1600 Fax (852) 2736-9960 National Semiconductor Japan Ltd Tel 81-043-299-2309 Fax 81-043-299-2408 National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications