Model 2578 Low Cost SP4T Switch

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The Model 2578 is a low cost high-performance terminated SP4T switch that operates over the full instantaneous bandwidth of 6 to 18 GHz with ON and OFF times of 250 nsec. Design features include an integrated circuit assembly of PIN diodes mounted in a microstrip transmission line.

The Model 2578 is equipped with an integrated driver that is powered by +5 and -12 volt supplies. The proper currents required to switch the ports ON or OFF are provided by the driver, which is controlled by external logic signals.


  • Frequency range: 6 to 18 GHz
  • Isolation: up to 55 dB
  • Phase and amplitude Matched
  • Non-reflective

Low Cost SP4T Switch Model 2578


PERFORMANCE CHARACTERISTICS

CHARACTERISTIC  

Frequency Range (GHz)
Min. Isolation (dB)
Max. Insertion Loss (dB)
Max. VSWR (ON/OFF)

6-18
55
3.5
2.0


Switching Time
    ON time ............................. 250 nsec max.
    OFF time ............................ 250 nsec max.
.
Power Handling Capability
 Without Performance   Degradation .............
500 mW cw or peak
.
 Survival Power
   Input to any "OFF" port............. 1W average, 10W peak
(1 μsec max. pulse width)
   Input to any "ON" port.................. 1W average, 75W peak
(1 μsec max. pulse width)
   Input to common port.................. 1W average, 75W peak
(1 μsec max. pulse width)
.
Power Supply Requirements
   +5V ±5%, 135 mA
   -12V ±5%, 60 mA
.
Control Characteristics
  Control Input Impedance. Schottky TTL, two unit loads. (A unit load is 2 mA sink current and 50 μA source current.)
  Control Logic ....................

Logic "0" (-0.3 to +0.8V) for port ON.                                                   Logic "1" (+2.0 to +5.0V) for port OFF.

OPTION (G09) ENVIRONMENTAL RATINGS
Operating Temperature
   Range
.....................................

-55°C to +110°C
Non-Operating
   Temperature Range
..........

-65°C to +125°C
Humidity ................................. MIL-STD-202F, Method 103B, Cond. B (96 hrs. at 95%)
Shock ...................................... MIL-STD-202F, Method 213B, Cond. B (75G, 6 msec)
Vibration ................................. MIL-STD-202F, Method 204D, Cond. B (.06" double amplitude or 15G, whichever is less)
Altitude .................................... MIL-STD-202F, Method 105C, Cond. B (50,000 ft)
Temp. Cycling ........................ MIL-STD-202F, Method 107D, Cond. A, 5 cycles
AVAILABLE OPTIONS
Option No. Description
G09 Guaranteed to meet Environmental
Ratings
G12 RoHS Compliant
G16 RoHS Plus REACH Compliant


DIMENSIONS AND WEIGHTS
Model 2578 SP4T Switch Dimensions and Weights


microwave switch diagrams

Dimensional Tolerances, unless otherwise indicated: .XX ±.02; .XXX ±.005