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RTI-22
5.0 DC ELECTRICAL CHARACTERISTICS
(VDD = 5.0V
± 10%; -55°C < TC < +125°C)
SYMBOL
PARAMETER
CONDITION
MINIMUM
MAXIMUM
UNIT
VIL
Low-level input voltage
0.8
V
VIH
High-level input voltage
2.0
V
IIN
Input leakage current
TTL inputs
Inputs with pull-down resistors
Inputs with pull-up resistors
VIN = VDD or VSS
VIN = VDD
VIN = VSS
-10
110
-2750
10
2750
-110
µA
µA
µA
VOL
Low-level output voltage
IOL = 4mA
0.4
V
VOH
High-level output voltage
IOH = -400µA
2.4
V
IOZ
Three-state output
leakage current
VO = VDD or VSS
-10
+10
µA
IOS
Short-circuit output current 1, 2
VDD = 5.5V, VO = VDD
VDD = 5.5V, VO = 0V
-90
90
mA
mA
CIN
Input capacitance 3
ƒ = 1MHz @ 0V
10
pF
COUT
Output capacitance 3
ƒ = 1MHz @ 0V
15
pF
CIO
Bidirect I/O capacitance 3
ƒ = 1MHz @ 0V
25
pF
IDD
Average operating current 1, 4
ƒ = 12MHz, CL = 50pF
50
mA
QIDD
Quiescent current
Note 5
1.5
mA
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.
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
RESERVED
1
1
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