The MA3690/1 chip set has three modes of operation: remote terminal, bus controller, and passive monitor It has a dual bus capability, requires minimum support hardware / software and is implemented on a radiation hard, CMOS/SOS process. For applications requiring access to Terminal Flag, a 48-Pin DIL MA3693 is available as an alternative to the MA3690.
As a remote terminal, the MA3690/1 is fully compatible with Mil-Std-1553B. The chip set obtained SEAFAC approval in December 1987. All options and mode commands specified by the Mil Std are implemented Full and meaningful use is made of status word bits and a comprehensive bit word is provided.
A unique mechanism has been incorporated that allows the subsystem to declare illegal commands legal, and vice versa, before the chip set services the command. It should be noted that use of this mechanism is optional and that the system defaults to normal operation if the option is not required. The chip set is easily interfaced to subsystem memory and is sufficiently flexible to ensure compatibility with a wide range of microprocessors.
As a bus controller the MA3690/1 has the ability to initiate all types of 1553B transfer on either of the two buses An instruction word is set up by the subsystem, prior to transmission, which contains details of transfer type and bus selection. Four bits of the instruction word have been used to specify the conditions under which the chip set will generate a subsystem interrupt. The most significant bits of the instruction word have been used to specify the conditions under which the chip set will perform an automatic retry and the number of retries to be carried out (max. 3). At the end of each instruction execution cycle, the chip set writes a report word into the subsystem memory; the contents of which give the subsystem an indication of the degree of success of the transfer.
The bus controller may be used in either of two configurations, i.e. single shot or table driven.
In the single shot configuration, the controller is under direct control from the subsystem (processor). In table driven configuration, the controller is given greater autonomy to execute a table of instructions held in either ROM or RAM.
As a passive monitor, the chip set will monitor all bus activity and pass any associated information to the subsystem. As the name implies, in this mode of operation, the chip set is truly passive and will not reply to command instructions.

*Radiation Hard to 1MRads (Si)
*High SEU Immunity, Latch-Up Free
*CMOS-SOS Technology
*All Inputs and Outputs Fully TTL or CMOS Compatible
*Military Temperature Range -55 to +125°C
*Dual Bus Capability
*Minimal Subsystem Interface
*Powerful Bus Control Facility
*Complete Remote Terminal Protocol
*SEAFAC Approved

MA3691, MA3693, MAS3690CL, MAR3690CL, MAS3691CLMAR3691CL

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General Description

The LM78XX series of three terminal positive regulators are available in the TO-220 package and with several fixed output voltages, making them useful in a wide range of applications.
Each type employs internal current limiting, thermal shut down and safe operating area protection, making it essentially indestructible.
If adequate heat sinking is provided, they can deliver over 1A output current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents


• Output Current up to 1A
• Output Voltages of 5, 6, 8, 9, 12, 15, 18, 24
• Thermal Overload Protection
• Short Circuit Protection
• Output Transistor Safe Operating Area Protection

LM7805CT LM7806CT LM7808CT LM7809CT LM7810CT LM7812CT LM7815CT LM7818CT LM7824CT

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The MC33170 is a complete solution for drain modulated dual–band GSM 900MHz and DCS–1800MHz Power Amplifiers. Thanks to its internal decoder, the MC33170 drastically simplifies the interface between the PAs and the baseband logic section, providing an immediate gain in part count but also in occupied copper area. The device is also ready for 1V platforms since it accepts logic high control signals down to 900mV@25°C. A priority management system ensures the negative is present before authorizing the power modulation, giving the necessary ruggedness to the final design. This function can easily be disabled for PAs not requiring a negative bias. The device is able to directly drive an external P or N–channel with the possibility to linearize the overall response via the internal high–performance control amplifier and easily implement system gain. Finally, an LDO delivers a stable voltage, usable for external biasing purposes.
• 1V platform compatible: ON voltage = 900mV, OFF voltage = 300mV max
• Priority management system prevents power modulation before negative bias establishes
• High performance 4.5MHz gain–bandwidth product operational amplifier
• Drives N or P–channel MOSFET
• 2.5V low–noise LDO
• Idle mode input for very low power consumption (standby mode)

MC33170DTB MC33170DTBR2

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