MIL-M-38510/13G
DEVICE TYPE 07
NC - No internal connection.
NOTES:
1. Output A connected to input BD for BCD count.
2. x indicates that either a logical H or a logical L may be present.
3. When used as a binary coded decimal decade counter, the BD input must be externally connected to the A output. The A input receives the incoming count, and a count sequence is obtained in accordance with the BCD count sequence truth table shown above. In addition to a conventional zero reset, inputs are provided to reset a BCD count for nine's complement decimal applications.
4. If a symmetrical divide-by-ten count is desired for frequency synthesizers or other applications requiring division of a binary count by a power of ten, the D output must be externally connected
to the A input. The input count is then applied at the BD input and a divide-by-ten square wave is
obtained at output A.
5. For operation as a divide-by-two counter and a divide-by-five counter, no external interconnections are required. Flip-flop A is used as a binary element for the divide-by-two function. The BD input
is used to obtain binary divide-by-five operation at the B, C, and D outputs. In this mode, the two counters operate independently; however, all four flip-flops are reset simultaneously.
FIGURE 3. Truth tables - Continued.
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