UT63M1XX Datasheet, PDF (14/23 Pages) List of Unclassifed Manufacturers – MIL-STD-1553A/B Bus Transceiver

AC ELECTRICAL CHARACTERISTICS ¹
V_CC = +5V (± 10%)
V_CCA = +5V to + 12V (± 5%) or +5V to +15V (± 5%)
V_EE = -12V or -15V (± 5%)
-55°C < T_C < +125°C
SYMBOL
t_R, t_F
PARAMETER
Transmitter Output
Rise/Fall Time
(See figure 10)
MINIMUM
100
MAXIMUM
300
t_RXDD
t_TXDD ³
t_RZCD
RXOUT Delay
TXIN Skew
Zero Crossing
t_TZCS2
Zero Crossing
Stability
(See figure 10)
-200
+200
-25
+25
-150
+150
-25
+25
Transmitter Off;
400
t_DXOFF3,4 Delay from Inhibit
Active
Transmitter On;
250
t_DXON3,5 Delay from Inhibit
Inactive
Notes:
1. All tests guaranteed per test figure 6.
2. Guaranteed by device characterization.
3. Supplied as a design limit but not guaranteed or tested.
4. Delay time from transmit inhibit (1.5V) to transmit off (280mV).
5. Delay time from not transmit inhibit (1.5V) to transmit on (1.2V).
UNIT
ns
ns
ns
ns
ns
ns
ns
CONDITION
Input ƒ = 1MHz 50% duty cycle:
direct-coupled R_L = 35 ohms output at
10% through 90% points TXOUT,
TXOUT. Figure 3.
RXOUT to RXOUT; Figure 4.
TXIN to TXIN; Figure 4.
Direct-coupled stub; input ƒ = 1MHz,
3V_PP (skew INPUT ± 150ns), rise/fall
time 200ns.
Input TXIN and TXIN should create
transmitter output zero crossings at
500ns, 1000ns, 1500ns, and 2000ns.
These zero crossings should not devi-
ate more than ± 25ns.
TXIN and TXIN toggling @ 1MHz;
TXIHB transitions from logic zero to
one.
TXIN and TXIN toggling @ 1MHz;
TXIHB transitions from logic one to
zero.
Table 3. Transformer Requirements Versus Power Supplies
COUPLING TECHNIQUE
DIRECT-COUPLED:
Isolation Transformer Ratio
TRANSFORMER-COUPLED:
Isolation Transformer Ratio
Coupling Transformer Ratio
± 12V_DC
1.2:1
1.66:1
1:1.4
± 15V_DC
1.4:1
2:1
1:1.4
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