MIL-STD-1553B Databus



Deriving its name from Serial, µ-coded, Monolithic, Multi-mode, Intelligent, Terminal, the monolithic SµMMIT™ family provides the system designer with an intelligent solution to MIL-STD-1553 multiplexed serial data bus design problems.

Each SµMMIT device is a single-chip that implements all three of the defined MIL-STD-1553 functions - Remote Terminal, Bus Controller, and Monitor. Operating either autonomously or with a tightly coupled host, the SµMMIT devices solve a wide range of MIL-STD-1553 interface problems. The UT69151 SµMMIT™ XTE contains all the functions of the SµMMIT DXE device, but offers internal memory and a Memory Management Unit (MMU).

Key Tech Specs
  • Features:
  • Comprehensive MIL-STD-1553 dual redundant Bus Controller (BC), Remote Terminal (RT), and Monitor Terminal (MT) with integrated bus transceivers, Memory, and Memory Management Unit (MMU)
  • MIL-STD-1553B, Notice II RT
    • Internal command illegalization with integrated bus transceivers in the RT mode
    • 16-bit read/write time-tag with user-defined resolution
    • Subaddress data buffering
  • Simultaneous RT/MT mode of operation
  • Flexible BC architecture designed to off-load the host computer
    • Minor frame timing
    • Efficient command block flow statements (Branch, Go To, Call)
    • Status word polling
    • Programmable retries
  • Programmable interrupt architecture with automatic interrupt logging available in all modes
  • Autonomous operation in all three modes of operation making it ideal for low cost remote terminals
  • Internal Memory Management Unit (MMU) interfaces host subsystem to 512Kbit SRAM with wait state and zero-wait state configurations
  • Built-In Test capability
  • Supports IEEE Standard 1149.1 (JTAG)
  • Flexible power supply configurations
    • +5-volt only operation
    • -15-volt and 5-volt operation
    • -12-volt and 5-volt operation
  • Applications:
  • Satellite Avionics Communications 
  • Subsystem Command, Control and Data Acquisition
  • Battery Electronics Management and Telemetry
  • Operational Environment:
  • Temperature Range: -55°C to +125°C
  • Physical:
  • Flexible packaging offering:
  • 139-Pin Pin Grid Array (PGA) 
  • 140-Lead Flatpack
  • Power:
  • 5W (max)
  • Flight Grade:
  • QML-Q
  • Export Control Classification Number (ECCN):
  • EAR99 
  • SMD Number:
  • 5962-94758


Defense Logistics Agency


Application Notes




ADEPT Notifications

The objective of this product advisory is to inform MIL-STD-1553 circuit designers of lessons learned during a residual voltage investigation and to offer some transformer selection recommendations to minimize residual voltage.

This amendment adds BTTC as an approved transformer supplier for optimal compatibility with the CAES 1553 Transceiver. The results of the BTTC compatability study are included. A final recommendation for leakage inductance screening limits is defined.

Notification of Internal Memory Obsolescence and Migration

Notification of Internal Memory Obsolescence and Migration

Addition of Case Outline Z for 139-CPGA

Amendment A has corrected Dimensions for Case Z for 139-CPGA.

Timing parameter limit changes to SuMMIT XTE.

Updated new package tolerances dimensions A


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