74LS190
PRESETTABLE 4-BIT BINARY UP/DOWN COUNTERS (Motorola)
74LS190
Synchronous Up/Down Counter (Texas Instruments)
74LS191
PRESETTABLE 4-BIT BINARY UP/DOWN COUNTERS (Motorola)
74LS191
Synchronous Up/Down 4-bit Binary Counters (Hitachi Semiconductor)
74LS191
Synchronous 4-Bit Up/Down Counter (Fairchild Semiconductor)
74LS191
Synchronous Up/Down Counters (Texas Instruments)
74LS192
PRESETTABLE BCD/DECADE UP/DOWN COUNTER (HITACHI)
74LS192
PRESETTABLE BCD/DECADE UP/DOWN COUNTER (ON Semiconductor)
74LS192
Synchronous Up/Down Decade Counters (Hitachi Semiconductor)
74LS192
PRESETTABLE BCD/DECADE UP/DOWN COUNTER (Motorola)