SN54190, SN54191, SN54LS190, SN54LS191, SN74190, S.
Motorola
SN74LS191 - PRESETTABLE BCD/DECADE UP/DOWN COUNTERS
PRESETTABLE BCD/DECADE UP/DOWN COUNTERS PRESETTABLE 4-BIT BINARY UP/DOWN COUNTERS The SN54 / 74LS190 is a synchronous UP/ DOWN BCD Decade (8421) Count.
Texas Instruments
SN74LS191 - SYNCHRONOUS UP/DOWN COUNTERS
SN54190, SN54191, SN54LS190, SN54LS191, SN74190, SN74191, SN74LS190, SN74LS191 SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL SDLS072 – DECEMB.
