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Space Applications / QPL – SPT Series

Low Power Pulse Transformer

CHARACTERISTICS

  • Met the requirements of MIL-PRF-21038 and MIL-STD-981, class S or class B.
    Part Number Ordering Information:
    SPTxxxxB-Group A screening for class B parts per MIL-STD-981
    SPTxxxxS-Group A and B screening for class S parts per MIL-STD-981

  • Operating Temperature: -55°C to +130°C

  • Weight: 5 grams maximum

  • Terminal Strength: Method 211 of MIL-STD-202, test condition A, 2 pounds applied force

  • Terminals: Solderable printed circuit type terminals

  • Overshoot and Ringing: ±1 volt maximum

  • Maximum Rise and Fall Time of Output Pulse: 

    • 150 nanoseconds maximum for: PT1011, PT1012, PT1013, PT1014

    • 200 nanoseconds maximum for: PT1015

    • 250 nanoseconds maximum for: PT1027

  • Dielectric Withstanding Voltage: 100 V rms

  • Insulation Resistance: 1,000 megohms minimum

FEATURES

  • Compact, low profile package, ideal for automatic placement.

  • Built to meet MIL-PRF-21038/27E specifications.

  • Low thermal expansion permits mounting on most substrate materials.

  • Welded internal connections, transfer molded package.

ELECTRICAL CHARACTERISTICS

Mil Spec
Dash
Number

Coast
Part

Number

Turns
Ratio
(±3%)

Primary

Secondary

Percent
Droop

Max

CMR
Min

DCR Max
(Ohms)

Impedance
Min (Ohms)

M21038-11

SPT1011

1:1
1:0.707

1-3
1-3

4-8
5-7

20

45 dB

(1-3)   3.0
(4-8)   3.0

(1-3)
4,000

M21038-12

SPT1012

1.4:1
2:1

1-3
1-3

4-8
5-7

20

45 dB

(1-3)   3.5
(4-8)   3.0

(1-3)
7,200

M21038-13

SPT1013

1:1
1:0.707

1-3
1-3

4-8
5-7

20

45 dB

(1-3)   3.2
(4-8)   3.0

(1-3)
4,000

M21038-14

SPT1014

2.3:1
1.66:1

4-8
5-7

1-3
1-3

20

45 dB

(1-3)   1.2
(4-8)   3.0

(5-7)
3,000

M21038-15

M21038-27

SPT1015

SPT1017

1:2.12
1:1.5

1:2.5
1:1.79

1-3
1-3

1-3
1-3

4-8
5-7

4-8
5-7

20

20

45 dB

45 dB

(1-3)   1.0
(4-8)   3.5

(1-3)   1.0
(4-8)   3.5

(4-8)
4,000

(4-8)
4,000

Circuit Diagram for Part Numbers
SPT1011, SPT1012, SPT1013, SPT1015 and SPT1027

Circuit Diagram for Part Number SPT1014