DS3662

If Military/Aerospace specified devices are required,pleasecontacttheNationalSemiconductorSalesOffice/Distributors for availability and specifications.
Supply Voltage                                                                                  7V
Input and Output Voltage                                                              5.5V
Storage Temperature Range                                        -65 to +150
Maximum Power Dissipation (Note 1) at 25
Cavity Package                                                                      1509 mW
Molded Package                                                                     1476 mW

The DS3662 is a quad high speed Schottky bus transceiver intended for use with terminated 120? impedance lines. DS3662 is specifically designed
to reduce noise in unbalanced trans-mission systems. The open collector drivers generate pre-cise trapezoidal waveforms with rise and fall
times of 15 ns (typical), which are relatively independent of capacitive load-ing conditions on the outputs.This reduces noise coupling to the
adjacent lines without any appreciable impact on the maximum data rate obtainable with high speed bus trans-ceivers.In addition,
the receivers usea low pass filterincon-junction with a high speed comparator, to further enhance the noise immunity. Tightly controlled
threshold levels on the receiver provide equal rejection to both negative and positive going noise pulses on the bus.The external
termination is intended to be a 180 resistor from the bus to 5V logic supply,to gether with a 390 resistor from the bus to ground.

The DS3662 bus can be terminated at one or both ends. A two input NOR gate is provided to disable all drivers in a package simultaneously.