MIL-PRF-21038/27E
Rise time and fall time of output pulse: Shall be less than 150 nanoseconds except dash numbers
-25, -26, -27, -30, and -31 shall be less than 250 nanoseconds maximum and dash numbers -9, -10,
-15, -20, -24 shall be less than 200 nanoseconds maximum. The transformers shall be tested as
specified on figure 3 with the resulting output waveform shown on figure 4.
Input impedance: The input impedance shall be as specified in table I when tested as specified on
figure 5 at the frequencies of 75 kHz and at 1 MHz at -55°C ±2°C; +25°C ±2°C; and +130°C ±2°C.
DC resistance: The maximum dc resistance shall be in accordance with table I.
Dielectric withstanding voltage: Method 301 of MIL-STD-202, 100 V rms.
Insulation resistance: Method 302 of MIL-STD-202, test condition B. Not less than 1,000 megohms
at 250 V dc.
Shock (specified pulse): Method 213 of MIL-STD-202, test condition I.
Vibration, high frequency: Method 204 of MIL-STD-202, test condition B.
Part or Identifying Number (PIN): Three levels of product are available in accordance with MIL-PRF-
21038, level C, level M, and level T. The PIN shall be coded as follows:
M21038/27-(dash no from table I) C
denotes C level part (e.g., M21038/27-01C)
M21038/27-(dash no. from table I)
denotes M level part (e.g., M21038/27-01)
M21038/27-(dash no. from table I)T
denotes T level part (e.g., M21038/27-01T)
Extension of qualification: Extension of qualification shall be in accordance with MIL-PRF-21038.
Manufacturers may submit additional proposals for extension of qualification for review and approval by
the qualifying activity. One way to obtain family approval of products in this specification is outlined
below:
Qualify M21038/27-02 extends qualification to M21038/27-01 to -31.
Qualify M21038/27-12 extends qualification to M21038/27-11 to -20, and -27 and -31.
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