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™ RTE (Remote Terminal) is an interface device linking a MIL-STD-1553 serial data bus to a host microprocessor and/or subsystem. The device’s MIL-STD-1553 interface includes encoding/decoding logic, error detection, command recognition, DMA interface, control/ configuration registers, clock, and reset logic.

Key Tech Specs
  • Features:
  • Comprehensive MIL-STD-1553 dual redundant Remote Terminal (RT) with integrated bus transceivers, Memory, and Memory Management Unit (MMU)
  • MIL-STD-1553B, Notice II RT
    • Internal command illegalization
    • 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 of the external initialization bus making it ideal for low cost remote terminals
  • Internal Memory Management Unit (MMU) interfaces host subsystem to 64Kbit SRAM with wait state and zero-wait state configurations
  • Built-In Test capability
  • Supports IEEE Standard 1149.1 (JTAG)
  • +5 volt only 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
  • 132-Lead Flatpack
  • Power:
  • 5W (max)
  • Flight Grade:
  • QML-Q
  • Export Control Classification Number (ECCN):
  • EAR99
  • SMD Number:
  • 5962-98587


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.

Updated new package tolerances dimensions A


Do you need help with an existing product?

Our customer and technical support teams are happy to assist.