Overview: ISL59424, ISL59445
1GHz Triple Multiplexing Amplifiers The ISL59424, ISL59445 are 1GHz bandwidth multiplexing amplifiers designed primarily for video input switching. These MUX-amps exhibit a fixed gain of 1 and also feature a high speed three-state to enable the output of multiple devices to be wired together. All logic inputs have pull-downs to ground and may be left floating. The EN pin, when pulled high, sets the ISL59424, ISL59445 in to low current mode-consuming just 15mW. An added feature in the ISL59424 is a latch enable function (LE) that allows independent logic control using a mon logic bus. When
LE is high the last logic state is preserved. TABLE 1. CHANNEL SELECT LOGIC TABLE ISL59424 S0 ENABLE HIZ LE OUTPUT 0 0 0 0 INO (A, B, C) 1 0 0 0 IN1 (A, B, C) X 1 X X Power Down X 0 X 0 1 X High Z 0 1 Last S0 State Preserved TABLE 2. CHANNEL SELECT LOGIC TABLE ISL59445 S1 S0 ENABLE HIZ OUTPUT 0 0 0 0 IN0 (A, B, C) 0 1 0 0 IN1 (A, B, C) 1 0 0 0 IN2 (A, B, C) 1 1 0 0 IN3 (A, B, C) X X 1 X Power Down X X 0 1 High Z DATASHEET FN7456 Rev 3.
