TX-M404 23 X 15 X 2.6 ? BCD BUS CONTROL EXT CLOCK TX-M403A 14 X 15 X 2 ? BCD BUS CONTROL 21.25MHZ TX-M403B 14 X 15 X 2 ? SERIAL BUS CONTROL 21.25MHZ TX-M405 12.5 X 12 X 2 ? BCD BUS CONTROL 21.25MHZ
TX-M501 11 X 11 X 2 ? SERIAL BUS CONTROL EXT CLOCK OUTPUT POWER CONTROL TX-M601 9 X 10.5 X 2 ? 2LINE(IIC)/3LINE BUS/BCD BUS 7.6MHZ OUTPUT POWER CONTROL