CT2561
Bus Controller, Remote Terminal and BUS Monitor
FOR MIL-STD-1553B
Features
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Second Source Compatible to the BUS-65610
16MHz CT2565 Replacement
RTU implements all dual redundant mode codes
Selective mode code illegalization available
16 bit microprocessor compatibility
BC checks status word for correct address and set flags
RTU illegal mode codes externally selectable
16 bit 碌Processor compatibility
DMA handshaking for subsystem message transfers
Continuous On-Line and Initiated Built-In-Test
MIL-PRF-38534 compliant circuits available
Packaging 鈥?Hermetic Metal
鈥?78 Pin, 2.1" x 1.87" x .25" Plug-In type package
鈥?82 Lead, 2.2" x 1.61" x .18" Flat package
CIRCUIT TECHNOLOGY
www.aeroflex.com
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General Description
The CT2561 is a 16 MHz single chip dual redundant MIL-STD-1553 Bus Controller (BC), Remote
Terminal Unit (RTU) and Bus Monitor (MT). Packaged in a hybrid plug-in or flatpack, the CT2561
performs all the functions required to interface a MIL-STD-1553 dual redundant serial data bus such
as ACT4487 and a subsystem parallel three-state data bus.
Using a single Aeroflex custom monolithic ASIC design, the CT2561 features pin-for-pin and
functional CT2565 compatibility, user initiated self-test, and low power consumption.
Compatible with most microprocessors the CT2561 provides a 16bit three-state parallel data bus
and uses direct memory access (DMA type) handshaking for subsystem transfers. All message
transfer timing, DMA and control lines are provided internally, thereby reducing the subsystem
overhead associated with message transfers.
The CT2561 implements all dual redundant MIL-STD-1553 mode codes. In addition, any mode
code may (Optionally) be legalized through the use of an external PROM. Complete error detection
is provided by the CT2561 for BC and RTU operation. Error detection includes: response time-out,
inter-message gaps, sync, parity, Manchester, word count and bit count.
The CT2561 is fully compliant with MIL-STD-1553, is available screened in accordance with the
requirements of MIL-STD-883 and operates over the full military temperature range of -55擄C to
+125擄C.
eroflex Circuit T
echnology
鈥?Data Bus Modules For The Future 漏 SCDCT2561 REV A 8/16/99
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