UT63M107PVC5 datasheet(5/23 Pages) ETC1

5 / 23 page

TRANSMITTER

The transmitter section accepts Manchester II biphase TTL data

and converts this data into differential phase-modulated current

drive. Transmitter current drivers are coupled to a MIL-STD-

1553 data bus via a transformer driven from the TXOUT and

TXOUT terminals. Transmitter output terminals’ non-

transmitting state is enabled by asserting TXIHB (logic 1), or

by placing both TXIN and TXIN at the same logic level. Table

1, Transmit Operating Mode, lists the functions for the output

data in reference to the state of TXIHB. Figure 3 shows typical

transmitter waveforms.

RECEIVER

The receiver section accepts biphase differential data from a

MIL-STD-1553 data bus at its RXIN and RXIN inputs. The

receiver converts input data to biphase Manchester II TTL

format and is available for decoding at the RXOUT and RXOUT

terminals. The outputs RXOUT and RXOUT represent positive

and negative excursions (respectively) of the inputs RXIN and

RXIN. Figure 4 shows typical receiver output waveforms.

Models UT63M105, UT63M107, UT63M125, and UT63M127

idle in the “0” state when disabled or receiving no signal.

POWER SUPPLY VOLTAGES

The UT63M1XX series meets device requirements over a wide

range of power supply voltages. Table 2 shows the overall

capabilities of all available devices. Each channel of the dual

transceiver is electrically and physically separate from the other

and fully independent, including all power and signal lines. Thus

there will be no interaction between the channels.

Notes:

1. x = Don’t care.

2. Transmitter output terminals are in the non-transmitting mode during Off

time.

3. Transmitter output terminals are in the non-transmitting mode during Off

time, independent of TXIHB status.

Table 1. Transmit Operating Mode

TXIN

TXIHB

TXOUT

Off

TXIN

Figure 3. Typical Transmitter Waveforms

TXIN

tTXDD

90%

10%

TXOUT, TXOUT

TXIN

LINE-TO-LINE

DIFFERENTIAL

OUTPUT

TXIN

TXIHB

BOTH HIGH

BOTH LOW

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