scope:

This standard establishes the requirements for the physical, functional, and electrical characteristics of a standard I/O interface for transfer of digital data.

The digital data interfaces specified herein shall be classified as follows:

(a) Type A (Navy tactical data system, (NTDS) slow). Parallel data transfer of up to 41,667 words per second on one cable. Binary voltage levels of 0 volt direct current (Vdc) (logical 1) and minus 15 Vdc (logical 0).

(b) Type B (NTDS) fast. Parallel data transfer of up to 250,000 words per second on one cable. Binary voltage levels of 0 Vdc (logical 1) and minus 3 Vdc (logical 0).

(c) Type C (ANEW). Parallel data transfer of up to 250,000 words per second on one cable. Binary voltage levels of 0 Vdc (logical 1) and plus 3.5 Vdc (logical 0).

(d) Type D (NTDS serial) interface. Asynchronous serial data transfer using a 10 megabit per second (Mb/s) clock rate. Bipolar plus or minus 3.25 volts nominal.

(e) Type E (NATO serial) interface. Asynchronous serial data transfer using a 10 Mb/s clock rate. Bipolar plus or minus 0.6 volt nominal.

(f) Type F (aircraft internal time division multiplex data bus). MIL-STD-1553 implementation within Navy computers.

(g) Type G (RS-449 compatible with RS-232). RS-449/RS-232 implementation within Navy computers.

(h) Type H (high throughput parallel). Parallel data transfer up to 500,000 words per second on one cable. Binary voltage levels of 0 Vdc (logical 1) and plus 3.5 Vdc (logical 0).

(i) Type J (fiber optic NATO serial). Reserved for the fiber optic implementation of type E.