DESCRIPTION AND APPLICATIONS
The military data bus specification, MIL-STD-1553, brought about the
need for versatile pulse transformers that meet all the electrical require-
ments of Manchester II serial bi-phase data transmission. The MLP-2000
series of transformers provide the turns ratio configurations, component
isolation, and common mode rejection ratio characteristics necessary for
MIL-STD-1553A and B compliance.
The step-up and step-down ratios that are available with the MLP-2000
series complement DDC's entire MIL-STD-1553 product line. These
transformers are low-profile and provide a 70% reduction in board space
compared to surface mount QPL pulse transformers. They are encapsu-
lated and meet the performance requirements of MIL-PRF-21038.
Sinusoidal or trapezoidal waveforms are accurately processed, making
the MLP-2000 series of transformers an excellent choice for any MIL-
STD-1553A or B application.
MLP-2000 SERIES
FEATURES
• New! 3.3V Ratios: 1.41:1, 1:2.07,
1:2.15, 1:2.65, 2.00:1 and 1:3.0
• Miniature package requires less
board space
• Low Profile
• Surface Mount
- Tape and Reel Available
• For Use with MIL-STD-1553A and B,
McAir, A-3818, A-5690, A-5232, and
A-4905
• Withstands Conventional
IR/Convection Reflow Process
• -55°C to +130°C Operating
Temperature Range
• Built and Tested to MIL-PRF-21038
and MIL-STD-202
• Available RoHS Compliant
N : 1
E
OUT
E = 10 V rms at 1 MHz
IN
Calc: CMR = 20 log (see Note 1)
E
IN
E
IN
1 : N
E
OUT
(see Note 1)
E
IN
(see Note 1)
360 Ω
E (5, 12, 15 volt) = 250 kHz square wave, 27.0 volts peak to peak with
a rise and fall time of 90ns ±5 ns.
IN
E (3.3 volt) = 250 kHz square wave, 7.0 volts peak to peak with
a rise and fall time of 90ns ±5 ns.
IN
Calc: Droop = ED x 100% (see figure 1 for E )
EOUT D
E
OUT
E
D
E
D
E
OUT
t
r
10%
90%
% DROOP = x 100%
OVERSHOOT AND
RINGING ±1 V MAX
E
D
E
OUT
t
f
FIGURE 1. WAVEFORM INTEGRITY
FIGURE 2. CIRCUIT FOR COMMON MODE REJECTION
FIGURE 3. CIRCUIT FOR WAVEFORM INTEGRITY
Note: Input to be applied and output to be measured for all dash numbers are as shown. N represents highest turns winding in each test.
MINIATURE LOW-PROFILE
0.185" MAXIMUM HEIGHT
MIL-STD-1553 SMT TRANSFORMERS
© 2000 Data Device Corporation
A Subsidiary of Data Device Corporation
40 Orville Drive, Bohemia, NY 11716-2529
Phone: (631) 244-7393; Fax: (631) 244-8893
Web site: www.bttc-beta.com