
RTI-22
5.0 DC E
LECTRICAL
C
HARACTERISTICS
(VDD = 5.0V
±
10%; -55
°
C < TC < +125
°
C)
SYMBOL
V
IL
V
IH
I
IN
PARAMETER
CONDITION
MINIMUM
MAXIMUM
0.8
UNIT
V
V
Low-level input voltage
High-level input voltage
Input leakage current
TTL inputs
Inputs with pull-down resistors
Inputs with pull-up resistors
Low-level output voltage
High-level output voltage
Three-state output
leakage current
2.0
V
IN
= V
DD
or V
SS
V
IN
= V
DD
V
IN
= V
SS
I
OL
= 4mA
I
OH
= -400
μ
A
V
O
= V
DD
or V
SS
-10
110
-2750
10
2750
-110
0.4
μ
A
μ
A
μ
A
V
V
μ
A
V
OL
V
OH
I
OZ
2.4
-10
+10
I
OS
Short-circuit output current
1, 2
V
DD
= 5.5V, V
O
= V
DD
V
DD
= 5.5V, V
O
= 0V
= 1MHz @ 0V
= 1MHz @ 0V
= 1MHz @ 0V
= 12MHz, CL = 50pF
Note 5
-90
90
mA
mA
pF
pF
pF
mA
mA
C
IN
C
OUT
C
IO
I
DD
QI
DD
Notes:
1. Supplied as a design limit but not guaranteed or tested.
2. Not more than one output may be shorted at a time for a maximum duration of one second.
3. Measured only for initial qualification, and after process or design changes that could affect input/output capacitance.
4. Includes current through input pull-ups. Instantaneous surge currents on the order of 1 ampere can occur during output switching.
Voltage supply should be adequately sized and decoupled to handle a large surge current.
5. All inputs with internal pull-ups or pull-downs should be left open circuit. All other inputs tied high or low.
Input capacitance
3
Output capacitance
3
Bidirect I/O capacitance
3
Average operating current
1, 4
Quiescent current
10
15
25
50
1.5
SYNC
BIT TIMES
COMMAND
WORD
5
5
5
1
DATA WORD
1
STATUS WORD
SYNC
SYNC
5
1
REMOTE TERMINAL
ADDRESS
SUBADDRESS/MODE
CODE
T/R
DATA WORD COUNT/
MODE CODE
P
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
P
DATA
1
1
1
1
1
1
1
Figure 8. MIL-STD-1553B Word Formats
16
REMOTE TERMINAL
ADDRESS
M
I
S
RESERVED
B
B
S
D
T
P
1
1