DivideByTwelve Decade CounterEach of these monolithic Counters SN74LS92 contains four masterslave FlipFlops and additional gating to provide a dividebytwo Counter and a threestage binary Counter for which the count cycle length is dividebyfive for the '90A and 'LS90, dividebysix for the '92A and 'LS92, and the divideby eight for the '93A and 'LS93.
All of these Counters have a gated zero reset and the '90A and 'LS90 also have gated settonine inputs for use in BCD nine's complement applications. To use their maximum count length (decade, dividebytwelve, or fourbit binary) of these Counters the CKB input is connected to the QA output. The input count pulses are applied to CKA input and the outputs are as described in the appropriate function table. A symmetrical dividebyten count CAN be obtained from the '90A or 'LS90 Counters by connecting the QD output to the CKA input and applying the input count to the CKB input which gives a dividebyten square wave at output QA. By Texas Instruments 
Part  Manufacturer  Description  Datasheet  Samples  

SN74LS92N  Rochester Electronics LLC  Divide By 12 Counter, LS Series, Asynchronous, Negative Edge Triggered, 3Bit, Up Direction, TTL, PDIP14, PLASTIC, DIP14  
SN74LS92D  Texas Instruments  DivideByTwelve Counter 14SOIC 0 to 70  
SN74LS92NSRE4  Texas Instruments  LS SERIES, ASYN NEGATIVE EDGE TRIGGERED 3BIT UP DIVIDE BY 12 COUNTER, PDSO14, GREEN, PLASTIC, SOP14  
SN74LS92NE4  Texas Instruments  DivideByTwelve Counter 14PDIP 0 to 70  
SN74LS92NSR  Texas Instruments  DivideByTwelve Counter 14SO 0 to 70  
SN74LS92DG4  Texas Instruments  DivideByTwelve Counter 14SOIC 0 to 70  
SN74LS92DE4  Texas Instruments  LS SERIES, ASYN NEGATIVE EDGE TRIGGERED 3BIT UP DIVIDE BY 12 COUNTER, PDSO14, GREEN, PLASTIC, SOIC14  
SN74LS92NSRG4  Texas Instruments  DivideByTwelve Counter 14SO 0 to 70  
SN74LS92DRG4  Texas Instruments  LS SERIES, ASYN NEGATIVE EDGE TRIGGERED 3BIT UP DIVIDE BY 12 COUNTER, PDSO14, GREEN, PLASTIC, MS012AB, SOIC14  
SN74LS92N  Texas Instruments  DivideByTwelve Counter 14PDIP 0 to 70 

SN74LS92 PbFree  SN74LS92 Cross Reference  SN74LS92 Schematic  SN74LS92 Distributor 
SN74LS92 Application Notes  SN74LS92 RoHS  SN74LS92 Circuits  SN74LS92 footprint 