54
Maxuum III Digital Electronic Indicator 2239028 Rev D
8.4.1.2 BCD Encoded Data Format
8.4.2 Electrical Characteristics
There are two types of hardware data communications signals
associated with the Maxum III Digimatic output, one is the input
type and the other is the output type. To establish a logic level
with the input type, be it logic high or logic low the external cir-
cuitry must be an open drain or an open collector type of driver.
Internally the input type is at logic high via a pull up resistor to
Vcc. To establish an output logic level with the output type, the
external circuitry must provide a pull up resistor to external
equipment Vcc.
8.5 Mating Connectors
EXAMPLES OF BCD ENCODED DATA FORMAT
EXAMPLE: + 1 . 2 3 4 5 mm
d1
d2
d3
d4
d5
d6
d7
d8
d9
d10 d11 d12 d13
F
F
F
F
0
0
1
2
3
4
5
4
0
EXAMPLE: - 0 . 3 4 9 mm
d1
d2
d3
d4
d5
d6
d7
d8
d9
d10 d11 d12 d13
F
F
F
F
8
0
0
0
3
4
9
4
0
EXAMPLE: - 0 . 1 9 7 5 in
d1
d2
d3
d4
d5
d6
d7
d8
d9
d10 d11 d12 d13
F
F
F
F
8
0
0
1
9
7
5
5
1
EXAMPLE: OFF - SCALE CONDITION
d1
d2
d3
d4
d5
d6
d7
d8
d9
d10 d11 d12 d13
F
F
F
F
8/0
F
F
F
F
F
F
5/4
1/0
BCD: Off-Scale Note:
All BCD digit fields will be set to 'F'. The sign, decimal point, and unit fields are encoded normally.
PARAMETER
PIN #
TEST CONDITION
MAX RATINGS
UNITS
input
4 Vi (max)
7.0
V
output
2, 3
Vo (max)
I (max)
7.0
1.0
V
mA
Mating Connectors
Connector
Mahr Federal
Part No.
6 pin
ECN-1521
10 pin
ECN-1689
R1
R2
Vcc
).054490%
/54054490%
open drain
output
Vi
(max)
SREQ
SCLK
i
(max)
SDAT
Vo
(max)
