4
Data Device Corporation
www.ddc-web.com
BU-65178/65179*/61688*/61689*
K-04/05-0
TABLE 1. BU-65178/65179*/61588/61688*/61689*
SPECIFICATIONS (CONT.)
UNITS
MAX
TYP
MIN
PARAMETER
Frequency
BU-61588/61688*/65178
• Default Mode
16
• Software Programmable Option
12
BU-61689*
• Default Mode
20
• Software Programmable Option
10
BU-65179*
• Pin Programmable Option
10/12/16/20
MHz
MHz
MHz
MHz
MHz
Long Term Tolerance
• 1553A Mode
• 1553B Mode
Short Term Tolerance, 1 second
• 1553A Mode
• 1553B Mode
Duty Cycle
• 16 MHz
• 12 MHz
• 10 MHz*
• 20 MHz
%
%
%
%
%
%
%
%
0.01
0.1
0.001
0.01
67
60
60
60
33
40
40
40
THERMAL
Thermal Resistance, Junction-to-
Case, Hottest Die (
θJC)
BU-65178/61588X3*
Operating Junction Temperature
Storage Temperature
Lead Temperature (soldering, 10
sec.)
°C/W
°C
°C
°C
6.8
150
150
+300
-55
-65
PHYSICAL CHARACTERISTICS
Size
BU-65178/61588 P
BU-65179*/61688*/61689*
BU-65178/61588 F/G
BU-65179*/61688*/61689*
Weight
BU-65178/61588 F/P/G
BU-65179*/61688*/61689*
in.
(mm)
in.
(mm)
0.3
(9)
1.0 X 1.0 X 0.150
(25.4 x 25.4 x 3.81)
1.0 X 1.0 X 0.155
(25.4 x 25.4 x 3.94)
oz
(g)
Notes: Notes 1 through 6 are applicable to the Receiver Differential
Resistance and Differential Capacitance specifications:
(1) Specifications include both transmitter and receiver (tied together internally).
(2) Measurement of impedance is directly between pins TX/RX A(B)
and TX/RX A(B) of the BU-65178/61588X3 hybrid.
(3) Assuming the connection of all power and ground inputs to the hybrid.
(4) The specifications are applicable for both unpowered and powered conditions.
(5) The specifications assume a 2 volt rms balanced, differential, sinu-
soidal input. The applicable frequency range is 75 kHz to 1 MHz.
(6) Minimum resistance and maximum capacitance parameters are
guaranteed, but not tested, over the operating range.
(7) Assumes a common mode voltage within the frequency range of dc to 2
MHz, applied to pins of the isolation transformer on the stub side (either direct
or transformer coupled), referenced to hybrid ground. Use a DDC recom-
mended transformer or other transformer that provides an equivalent CMRR.
Table 1 Notes (Cont.):
(8) Typical value for minimum intermessage gap time. Under software
control, may be lengthened to (65,535
µs minus message time), in
increments of 1
µs.
(9) Software programmable (4 options). Includes RT-to-RT Timeout (Mid-
Parity of Transmit Command to Mid-Sync of Transmitting RT Status).
(10) For both +5 V logic and transceiver. +5 V for channels A and B.
(11) Measured from mid-parity crossing of Command Word to mid-sync
crossing of RT’s Status Word.
(12) External 10
µF Tantalum and 0.1 µF capacitors should be located
as close as possible to Pins 20 and 72 on the Flat Package
and Pins A9 and J3 on the PGA package, and 0.1
µF at Pin 37/D3.
(13) MIL-STD–1760 requires that the Mini-ACE produce a 20 Vp-p min-
imum output on the stub connection.