
4
SCDCT3231 Rev B
Output Characteristics, RX Data & RX Data
“1” State (I
SOURCE
= -0.4 mA) Note 2
“0” State (I
SINK
= 4 mA) Note 2
Note: With Receiver input below threshold, both RX Data & RX Data
outputs remain in “1” state.
Delay (average) from differential input zero crossings to RX Data
& RX Data output 50% points.
V
OH
V
OL
t
DRX
2.5
-
-
3.3
-
190
-
0.5
450
V
V
ns
Note 1: Assumes unit in free air (natural convection cooling).
DRIVER SECTION
Parameter/Condition
Sym
Min
Typ
Max
Unit
Power Supply Voltage Ranges
(See Receiver Section for V
CCL
)
V
CCTX
V
EETXL
+11.75
-11.75
-
-
+15.75
-15.75
V
V
Supply Current
,
“Standby” mode
(See Receiver Section for I
CCL
)
(TX Inhibit high; or TX Data & TX Data both high or both low)
I
CCTXS
I
EETXS
-
-
12
0
Note 2
1.0
mA
mA
Supply Current transmitting at 1MHz into a 35
Ω
load
at point A in Figure 4
Note: I
CCL
limits do not change with mode of
operation or duty cycle
Duty Cycle
I
CCX
25
Note 4
45
Note 2
mA
25%
I
EEX
25
Note 3
35
Note 2
mA
100%
V
CCTX
Note 4
150
Note 2
mA
I
EETX
Note 3
135
Note 2
mA
Input Characteristics, TX Data In or TX Data In
“0” Input Current (V
IN
= 0.4 V)
“1” Input Current (V
IN
= 2.7 V)
“0” Input Voltage
“1” Input Voltage
I
ILD
I
IHD
V
ILD
V
IHD
-
-
-
2.0
-
-
-
-
-1.2
100
0.7
-
mA
μa
V
V
Inhibit Characteristic
“0” Input Current (V
IN
= 0.4 V)
“1” Input Current (V
IN
= 2.7 V)
“0” Input Voltage
“1” Input Voltage
Delay from TX Inhibit (0
→
1) to inhibited output impedance
Delay from TX Inhibit (1
→
0) to active output impedance
Differential Output Noise, inhibit mode
Differential output impedance (inhibited) at 1MHz
I
ILI
I
IHI
V
ILI
V
IHI
I
t
DXOFF
t
DXON
V
NOI
Z
OI
-
-
-
2.0
-
-
-
10K
-
-
-
-
300
100
-
-
-0.8
50
0.7
-
400
250
10
-
mA
μA
V
V
ns
ns
mV
PEAK
Ω
Output Characteristics (Figure 3)
Differential output level (140 ohm load)
Differential Active output impedance at 1MHz
Rise and Fall times (10% to 90% of p-p output)
Output offset at point A in Fig. 4 (35
Ω
load) 2.5μS after mid-bit
crossing of the parity bit of the last word of a 660μS message
Delay from 50% point of TX Data or TX Data input to zero
crossing of differential output
V
O
Z
OA
t
R
/t
F
V
OS
t
DTX
26
-
100
-
-
30
4
150
±20
100
35
-
300
±75
250
Vp-p
Ω
ns
mVpeak
ns
Note 2: Maximum supply currents for driver and receiver combined are included in power and thermal data table.
ELECTRICAL CHARACTERISTICS con’t
RECEIVER SECTION
Parameter/Condition
Sym
Min
Typ
Max
Unit