Building Filters
 - Texas Instruments SNJ54193J Counter, Up/Down, 4 Bit Binary, 16 Pin, DIP- Manufacturer: Texas Instruments
 - Texas Instruments SNJ54193J Counter, Up/Down, 4 Bit Binary, 16 Pin, DIP Condition : New $12 USDSan Jose, CA
 - Texas Instruments SNC54185AJ Single 4-Bit IC 16-Pin Ceramic Dip Counter- Manufacturer: Texas Instruments
 - Texas Instruments SNC54185AJ Single 4-Bit IC 16-Pin Ceramic Dip Counter Condition : New $15 USDSan Jose, CA
 - Texas Instruments, SNJ54S169J Counter Single 4-Bit Sync Binary UP/Down 16-Pin- Manufacturer: Texas Instruments
 - Texas Instruments, SNJ54S169J Counter Single 4-Bit Sync Binary UP/Down 16-Pin Condition : New $15 USDSan Jose, CA
