Surface mount
MIL-PRF-21038/27
Level T Interface Transformers
■qualified for use in QPL MIL-STD-1553 applications
■dual ratio in a single package
■ designed, built, and tested
to MIL-PRF-21038 Level T*
■ two packages available: Package B has
gull-wing leads; Package F is flat pack
■ built in ISO 9002 facility
APPLICABLE SPECIFICATIONS
■MIL-STD-1553B
■MIL-STD-202
■MIL-I-45208
■MIL-T-10727
■MIL-PRF-21038/27*
■ISO 9002
SUMMARY PERFORMANCE SPECIFICATIONS
Impedance................................................................................................... see table
Droop.............................................................................................................. <20%
Overshoot.................................................................................................. +1V max
Common mode rejection (CMR)................................................................. >45 dB
Frequency range (no load)............................................................. 75 kHz to 1MHz
Operating temperature range........................................................... -55oC to 130oC
Weight....................................................................................................... <5 grams
Insulation resistance (min)........................................... 10K megohms @ 250 Vdc
Dielectric withstanding voltage................................................................ 100 Vrms
*MIL-PRF-21038E (8 July 1998) supersedes MIL-T-21038D (11 May 1979) and establishes
three product levels for low power pulse transformers:
■Level C - for high reliability commercial/industrial applications;
■Level M - for general purpose military applications;
■Level T - for high reliability critical military applications.
TWO PEARL BUCK COURT
●
BRISTOL, PA 19007-6812
●
TEL 215-781-6400
●
FAX 215-781-6403
●
www.pulsespecialty.com
CHARACTERISTICS
8l~sm~t
MILITARYMILITARY
DESIGNATIONDESIGNATION
NUMBERNUMBER
TECHNITROLTECHNITROL
PART NO.PART NO. PACKAGEPACKAGE HEIGHT HEIGHT
(in.)(in.)
MAXMAX
TERMINALSTERMINALS RATIORATIO
( (++3%)3%) RDCRDC
(ohms) (ohms)
MAXMAX
IMPEDANCEIMPEDANCE
(ohm s) (ohm s)
MINMIN
M21038/27-11T SMQT1553-6 B.250 1-3:4-8
1-3:5-7 1CT:1CT
1CT:.707CT 1-3 3.0
4-8 3.0 (1-3)
4,000
M21038/27-12T SMQT1553-7 B.250 1-3:4-8
1-3:5-7 1.4CT:1CT
2CT:1CT 1-3 3.5
4-8 3.0 (1-3)
7,200
M21038/27-13T SMQT1553-8 B.250 1-3:4-8
1-3:5-7 1.25CT:1CT
1.66CT:1CT 1-3 3.2
4-8 3.0 (1-3)
4,000
M21038/27-14T SMQT1553-9 B.250 1-3:4-8
1-3:5-7 1CT:2.3CT
1CT:3.2CT 1-3 1.2
5-7 3.0 (5-7)
3,000
M21038/27-15T SMQT1553-10* B.250 1-3:4-8
1-3:5-7 1CT:2.12CT
1CT:1.5CT 1-3 1.0
4-8 3.5 (4-8)
4,000
M21038/27-16T FPQT1553-6 F.250 1-3:4-8
1-3:5-7 1CT:1CT
1CT:.707CT 1-3 3.0
4-8 3.0 (1-3)
4,000
M21038/27-17T FPQT1553-7 F.250 1-3:4-8
1-3:5-7 1.4CT:1CT
2CT:1CT 1-3 3.5
4-8 3.0 (1-3)
7,200
M21038/27-18T FPQT1553-8 F.250 1-3:4-8
1-3:5-7 1.25CT:1CT
1.66CT:1CT 1-3 3.2
4-8 3.0 (1-3)
4,000
M21038/27-19T FPQT1553-9 F.250 1-3:4-8
1-3:5-7 1CT:2.3CT
1CT:3.2CT 1-3 1.2
5-7 3.0 (5-7)
3,000
M21038/27-20T FPQT1553-10* F.250 1-3:4-8
1-3:5-7 1CT:2.12CT
1CT:1.5CT 1-3 1.0
4-8 3.5 (4-8)
4,000
M21038/27-27T SMQT1553-45* B.250 1-3:4-8
1-3:5-7 1CT:2.50CT
1CT:1.79CT 1-3 1.0
4-8 3.5 (4-8)
4,000
M21038/27-31T FPQT1553-45* F.250 1-3:4-8
1-3:5-7 1CT:2.50CT
1CT:1.79CT 1-3 1.0
4-8 3.5 (4-8)
4,000
MILITARYMILITARY
DESIGNATIONDESIGNATION
NUMBERNUMBER
TECHNITROLTECHNITROL
PART NO.PART NO. PACKAGEPACKAGE HEIGHT HEIGHT
(in.)(in.)
MAXMAX
TERMINALSTERMINALS RATIORATIO
( (++3%)3%) RDCRDC
(ohms) (ohms)
MAXMAX
IMPEDANCEIMPEDANCE
(ohm s) (ohm s)
MINMIN
M21038/27-11T SMQT1553-6 B.250 1-3:4-8 1CT:1CT 1-3 3.0 (1-3)
*Designed for transceivers utilizing a single supply voltage (+5V).
SCHEMATICS AND DIMENSIONS -- Packages B and F
Note: Contact factory
for SMQ 1553-9 and
FPQ 1553-9 schematic
Package “B”
(side view)
Package “F”
(side view)
TWO PEARL BUCK COURT
●
BRISTOL, PA 19007-6812
●
TEL 215-781-6400
●
FAX 215-781-6403
●
www.pulsespecialty.com
