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DescriptionThe PRL-454T-SMA is a 1:4 digital signal fanout buffer and level translator with one TTL input and four LVDS outputs. The TTL input has a 1 kΩ or 50 Ω input impedance, selectable by a toggle switch. The 1 kΩ input setting is used most often for receiving signals from digital I/O boards. These DIO boards are generally not designed for driving 50 Ω loads. For this type of application, it is recommended that the interconnecting cable length be limited to no more than 18 inches. For applications exceeding this length, pre-buffering the TTL signal with a PRL-444, High Input Impedance Line Driver, may be required. When switched to the 50 Ω input position, fmax can be increased beyond 400 MHz. Since very few affordable TTL clock generators can run beyond 250 MHz, we recommend that the PRL-177A-500 be used for testing the PRL-454T-SMA. The PRL-454T-SMA has a 5 V tolerant input and can be driven by the PRL-177A-500 directly. The PRL-454T-SMA is supplied with a PRL-760E ±9.0 V/1.8 A AC/DC adapter and housed in a 1.3 x 2.9 x 2.9-in. extruded aluminum enclosure. The PRL-454T-SMA may also be ordered without the power supply as part number PRL-454T-SMA-OEM. A maximum of four units can share the included PRL-760E AC/DC adapter using additional units of cable #88000102-4. If mounting is desired, a pair of the #35001420 mounting brackets can accommodate any two PRL modules of the same length. |