CT2512-PCB Aeroflex Circuit Technology, CT2512-PCB Datasheet - Page 6

• Manufacturer Part Number: CT2512-PCB
• Description: Dual Redundant Remote Terminal For Mil-std-1553b In Pcb Style
• Manufacturer: Aeroflex Circuit Technology

Plug-In
Pkg
48
49
50
51
52
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
53
SCDCT2512PCB Rev A
Flat
Pkg
17
19
21
23
25
27
29
31
33
35
37
39
80
78
76
74
72
70
68
66
64
TXDATAOUT B
RXDATAIN B
BUF ENA
Function
ADDRD
ADDRB
ADDRP
DTACK
12 MHz
RESET
DB10
DB12
DB14
GND
V
GBR
R/W
V
V
A2
A0
A4
EE
TERMINAL CONNECTIONS AND PIN FUNCTIONS (con’t)
L
L
B
B
Bidirectional parallel data bus bit 10.
Bidirectional parallel data bus bit 12.
Bidirectional parallel data bus bit 14.
+5 Volt input power supply connection for RTU digital logic section.
Power supply return for RTU digital logic section.
Input of the 2nd MSB of the assigned terminal address.
Input of the 2nd LSB of the assigned terminal address.
Input of address parity bit. The combination of assigned terminal address and ADDRP
must be odd parity for the RT to work.
HIGH, output to the primary side of the coupling transformer that connects to the B
channel of the 1553 bus.
-12 / -15 Volt input power supply connection for the B channel transceiver. (See note 7).
+5 Volt input power supply connection for the B channel transceiver.
Input from the LOW side of primary side of the coupling transformer that connects to the
B channel of the 1553 bus.
Multiplexed address line output. When INCMD is LOW, or A5 through A9 are all zeroes
or all ones (mode command), it represents the latched output of the 3rd MSB in the word
count field of the command word. When INCMD is HIGH and A5 through A9 are not all
zeroes or all ones, it represents the 3rd MSB of the current word counter. (See note 1).
Multiplexed address line output. When INCMD is LOW, or A5 through A9 are all zeroes
or all ones (mode command), it represents the latched output of the LSB in the word
count field of the command. When INCMD is HIGH and A5 through A9 are not all
zeroes or all ones, it represents the LSB of the current word counter. (See note 1).
Data transfer acknowledge - Active LOW output signal during data transfers to or from
the subsystem indicating the RTU has received the DTGRT in response to DTREQ and is
presently doing the transfer. Can be connected directly pins 67 on Plug-In Pkg or pin 66
on Flat Pkg (BUF ENA) for control of 3-state data buffers; and to 3-state address buffer
control lines, if they are used.
Multiplexed address line output. When INCMD is LOW or A5 through A9 are all zeroes
or all ones (mode command), it represents the latched output of the MSB in the word
count field of the command word. When INCMD is HIGH and A5 through A9 are not all
zeroes or all ones, it represents the MSB of the current word counter. (See note 1).
Read/Write - Output signal that controls the direction of the internal data bus buffers.
Normally, the signal is LOW and the buffers drive the data bus. When data is needed from
the subsystem, it goes HIGH to turn the buffers around and the RT now appears as an
input. The signal is HIGH only when DTREQ is active (LOW).
Good block received - LOW level output pulse (500 ns) used to flag the subsystem that a
valid, legal, non-mode receive command with the correct number of data words has been
received without a message error and successfully transferred to the subsystem. (See
note 4).
12 MHz clock input - Input for the master clock used to run RTU circuits.
Buffer enable - Input used to enable or 3-state the internal data bus buffers when they are
driving the bus. When LOW, the data bus buffers are enabled. Could be connected to
DTACK, (pin 62, Plug-In Pkg), (pin 76, Flat Pkg) if RT is sharing the same data bus as
the subsystem. (See note 5).
Input resets entire RT when LOW.
Description
6