QPL
MIL-STD-1553
INTERFACE
TRANSFORMERS
Pulse Specialty Components
Two Pearl Buck Court
Bristol, PA 19007-6812
Tel 215-781-6400
n
Fax 215-781-6403
www.pulsespecialty.com
For non-QPL pulse transformers....
In addition to the QPL transformers described in this
catalog, Pulse Specialty Components offers scores of
low-power pulse transformer models for commercial,
industrial, COTS, and other (non-QPL) military appli-
cations. These include:
n
surface-mount or through-the board
n
standard profile, low profile, or stacked
n
single- or dual-ratio
n
single- or dual-interface
For more information, request catalog
“Non-QPL MIL-STD-1553
Low-Power Pulse Transformers”
P
ULSE
S
PECIALTY
C
OMPONENTS
MIL-STD-1553
Transformers
Interface
product levels for low power pulse
transformers. The new specifica-
tion allows designers to select a
QPL device and limit the testing to
what's needed for the application:
n
Level C - for high reliability
commercial/industrial applications;
n
Level M - for general purpose
military applications;
n
Level T - for high reliability
critical military applications.
Level C parts are tested to our
internal specifications. Group A or
B testing is not performed on Level
C parts. A Level M part is exactly
the same as the original QPL prod-
uct that was defined by the earlier
MIL-T-21038/27 specification. A
Level T part receives the most
extensive testing along with ther-
mal cycling. For more details, see
next page.
COTS transformers.
Several of our QPL transformers
have non-QPL COTS counterparts
-- same component layout and
electrical characteristics but
they’re built for commercially-
oriented requirements, and manu-
factured in higher volume at lower
cost. We’ve noted where a COTS
counterpart to a QPL product
exists with the symbol shown here.
As “Technitrol Components
Division,” we were the first to
achieve QPL status for MIL-STD
1553B interface transformers, also
known as low-power pulse trans-
formers. Today, as “Pulse
Specialty Components,” our QPL
transformer line includes a wide
selection of products for each of
the product levels called for by
MIL-PRF-21038/27,
formerly
MIL-T-21038/27.
We also were the first to achieve
QPL status on surface-mount MIL-
STD-1553 pulse transformers --
more than 15 years ago. To this
day, many manufacturers have dif-
ficulty producing components that
can survive the high-heat rigors of
surface mounting and the perform-
ance, reliabliability, part-to-part
repeatibility, and lifespan required
by high-rel military and commer-
cial applications.
This catalog covers all of our QPL
transformer products. Each part
has a military designation number
(found on DESC/DSCC approved
drawings) as well as our own prod-
uct number. These part numbers
are listed in the specification
tables.
About MIL-T-21038/27
MIL-PRF-21038/27
and
Contents
Single ratio
through-the-board
QPL pulse transformers....... 4
Dual ratio
through-the-board
QPL pulse transformers....... 6
Dual ratio
surface mount
QPL pulse transformers....... 8
MIL-PRF-21038E (8 July 1998)
supersedes MIL-T-21038D (11
May 1979) and establishes three
For more information on COTs
transformers, refer to our non-QPL
transformer catalog.
TWO PEARL BUCK COURT
l
BRISTOL, PA 19007-6812
l
TEL 215-781-6400
l
QPL Transformers — 2
FAX 215-781-6403
l
www.pulsespecialty.com
back to “Contents”
P
ULSE
S
PECIALTY
C
OMPONENTS
MIL-PRF-21038/27 Inspection, Sampling, Testing
Table 1: Group A Inspection
Level "C" **
Tests
NA
S ampling
Plan
Tests
Electrical
Characteristics per
MIL-PRF-21038/27
Visual and mechanical
inspection
NA
Level " M"
S ampling
Plan
sample per
Table 3
sample per
Table 3
Tests
Level " T"
Sampling
Plan
100%
Thermal Shock
NA
NA
Winding Continuity
Electrical
Characteristics per
M IL-PRF -21038/27
Visual and mechanical
inspection
100%
100%
NA
NA
sample per
Table 3
Table 2: Group B Inspection
Level "C" **
Tests
NA
S ampling
Plan
Tests
Dielectric
Withstanding
Volta ge
Insulation Resistance
Level " M"
S ampling
Plan
sample per
Table 3
sample per
Table 3
Tests
D ielectric
Withstanding
Voltage
Level " T"
Sampling
Plan
sample per
Table 3
sample per
Table 3
NA
Insulation Resistance
Table 3: Sampling Plans for Group A and Group B inspections
Lot size
1 to 5
6 to 13
14 to 50
51 to 90
91 to 150
151 to 280
281 to 500
501 to 1200
1,201 to 3,200
3,201 to 10,000
Group A, group II ins pections
all
all
13
13
13
20
29
34
42
50
Group B
all
5
5
7
11
13
16
19
23
29
** Parts ordered to Level C are certified to comply with MIL-PRF-21038 Level C, however testing will be performed
per manufacturer's internal requirements and sampling rates.
TWO PEARL BUCK COURT
l
BRISTOL, PA 19007-6812
l
TEL 215-781-6400
l
QPL Transformers — 3
FAX 215-781-6403
l
www.pulsespecialty.com
P
ULSE
S
PECIALTY
C
OMPONENTS
back to “Contents”
Single ratio
through-the-board
QPL pulse transformers
n
qualified for use in QPL MIL-STD-1553 applications
n
single ratio packages, see schematics
n
designed, built, and tested to
MIL-PRF-21038 Levels C, M, and T*
n
package C is 4-lead; package D is
6-lead (center tap)
n
built in ISO 9002 facility
APPLICABLE SPECIFICATIONS
n
MIL-STD-1553B
n
MIL-STD-202
n
MIL-T-10727
n
MIL-PRF-21038/27*
n
ISO
9002
SUMMARY PERFORMANCE SPECIFICATIONS
Impedance.................................................................................. see table, next page
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:
n
Level C - for high reliability commercial/industrial applications;
n
Level M - for general purpose military applications;
n
Level T - for high reliability critical military applications.
TWO PEARL BUCK COURT
l
BRISTOL, PA 19007-6812
l
TEL 215-781-6400
l
QPL Transformers — 4
FAX 215-781-6403
l
www.pulsespecialty.com
back to “Contents”
P
ULSE
S
PECIALTY
C
OMPONENTS
n
single
TECHNITROL
TECHNITROL
PART NO.
QC 1553-20
Q1553-20
QT1553-20
QC 1553-21
Q1553-21
QT1553-21
QC 1553-22
Q1553-22
QT1553-22
QC 1553-23
Q1553-23
QT1553-23
QC 1553-24
Q1553-24
QT1553-24
QC 1553-25*
Q1553-25*
QT1553-25*
QC 1553-51*
Q1553-51*
QT1553-51*
QC 1553-52*
Q1553-52*
QT1553-52*
D
.250
1-5:6-2
1CT:2.5CT
1-5 1.0
6-2 2.8
(6-2)
3,000
D
.250
1-5:6-2
1CT:1.79CT
1.5 0.90
6-2 2.5
(6-2)
3,000
D
.250
1-5:6-2
1CT:1.5CT
1-3 0.90
6-2 2.5
(6-2)
3,000
D
.250
1-5:6-2
1CT:2CT
1-5 1.3
6-2 2.6
(6-2)
3,000
D
.250
1-5:6-2
1CT:1.66CT
1-5 1.5
6-2 2.4
(6-2)
3,000
D
.250
1-5:6-2
1CT:1.41CT
1-5 2.2
6-2 2.7
(6-2)
3,000
D
.250
1-5:6-2
1CT:1CT
1-5 2.5
6-2 2.8
(6-2)
3,000
PACKA GE
HEIGHT
(in.)
MAX
.250
TERMINALS
TERMINALS
RATIO
( +3%)
(+ 3%)
1:1.41
CHARACTERISTICS
LINE
LEVEL
MILITARY
DESIGNATION
NUMBER
M 21038/27-05C
M 21038/27-05
M 21038/27-05T
M 21038/27-06C
M 21038/27-06
M 21038/27-06T
M 21038/27-07C
M 21038/27-07
M 21038/27-07T
M 21038/27-08C
M 21038/27-08
M 21038/27-08T
M 21038/27-09C
M 21038/27-09
M 21038/27-09T
M 21038/27-28C
M 21038/27-28
M 21038/27-28T
M 21038/27-29C
M 21038/27-29
M 21038/27-29T
M 21038/27-30C
M 21038/27-30
M 21038/27-30T
ratio
n
through
the board
RDC
(ohms)
(ohms)
MAX
1-2 2.2
4-3 2.7
IMPEDA NCE
(ohm s)
MIN
(4-3)
3,000
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
C
M
T
C
M
T
C
M
T
C
M
T
C
M
T
C
M
T
C
M
T
C
M
T
C
1-2:4-3
*Designed for transceivers utilizing a single supply voltage (+5V).
Package C
Package D
Notes:
1. All dimensions are in inches.
2. Tolerances: .xx = +.008
3. All specifications and dimensions
are subject to change without notice
.
TWO PEARL BUCK COURT
l
BRISTOL, PA 19007-6812
l
TEL 215-781-6400
l
QPL Transformers — 5
FAX 215-781-6403
l
www.pulsespecialty.com
