Extensive Cell Library
The UTR 0.8µ family of gate arrays is supported by an extensive
cell library that includes SSI, MSI, and 54XX-equivalent functions, as well as, RAM and other megafunctions. User-
selectable options for cell configurations include scan for all
register elements, as well as output drive strength. UTMC’s
megacell library includes the following functions:
• Intel® 80C31 equivalent
• MIL-STD-1553 functions (BCRTM, RTI, RTMP)
• MIL-STD-1750 microprocessor
• Standard microprocessor peripheral functions
• Configurable RAM
Refer to UTMC’s UTR 0.8µ Design Manual for complete cell
listing and details.
I/O Buffers
The UTR 0.8µ gate array family offers up to 342 device pad
locations (note: device pad availability is affected by package
selection and pinout.) The I/O cells can be configured by the
user to serve as input, output, bidirectional, three-state, or additional power and ground pads. Output drive options range from
2 to 8mA. To drive larger off-chip loads, output drivers can be
combined in parallel to provide additional drive up to 12mA.
Other I/O buffer features and options include:
• Slew rate control
• Pull-up and pull-down resistors
• TTL, CMOS, and Schmitt levels
• Built-in boundary-scan
JTAG Boundary-Scan
The UTR 0.8µ arrays include a test access port and boundaryscan architecture that conforms to the IEEE Standard 1149.1
(JTAG). Some of the benefits this capability offers include the
following:
• Allows easy test of complex assembled printed circuit
boards
• Can be used to gain access to and control internal
scan paths
• Can be used to initiate Built-In Self Test
Clock Driver Distribution
UTMC design tools provide methods for balanced clock distribution that maximize drive capability and minimize relative
clock skew between clocked devices.
Speed and Performance
UTMC specializes in high-performance circuits designed to operate in harsh military and radiation environments. Table 3
presents a sampling of typical cell delays.
Note that the propagation delay for a CMOS device is a function
of its fanout loading, supply voltage, operating temperature, and
processing tolerance. In a radiation environment, additional performance variances must be considered. The UTR 0.8µ
simulation models account for all of these effects to accurately
determine circuit performance for its particular set of use
conditions.
Power Dissipation
Each internal gate or I/O driver has an average power consumption based on its switching frequency and capacitive loading.
The radiation-hardened processes exhibit power dissipation that
is typical of CMOS processes. For a rigorous power estimating
methodology, refer to the UTMC UTR 0.8µ Design Manual or
consult with a UTMC Applications Engineer.