XRT4500 Datasheet, PDF (32/99 Pages) Exar Corporation – MULTIPROTOCOL SERIAL NETWORK INTERFACE IC

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XRT4500
MULTIPROTOCOL SERIAL NETWORK INTERFACE IC
REV. 1.0.7
POWER SUPPLY CONSUMPTION
When external power supplies are available, the
switching regulator and charge pumps may be dis-
abled to save on component cost and current con-
sumption from the +5V supply.
The table below shows the typical currents the +5V,
+12V and -6V supplies require for each of the interface
modes.
I_DD
I_PP
I_SS
MODE
INTERFACE/CONDITIONS
SUPPLY
+5V
+12V
-6V
UNIT
M2
M1
M0
27
17
40
mA
0
0
0 V.10, No Load, No Signal
75
17
-160
mA
0
0
0 V.10, Full Load with Signal
27
15
-35
mA
0
0
1 EIA-530A, No Load (V.11)
230
15
-130
mA
0
0
1 EIA-530A, Full Load (V.11)
27
15
-35
mA
0
1
0 EIA-530 (V.36) No Load
27
15
-35
mA
0
1
1 X.21
65
15
-70
mA
1
0
0 V.35, No Load on V.28 drivers
68
45
-120
mA
1
0
0 V.35, Full Load on V.28 drivers
27
15
-35
mA
1
0
1 Reserved
20
30
-45
mA
1
1
0 RS-232, No Load
26
65
-55
mA
1
1
0 RS-232, Full Load
The following two charts show how the IDD current
gle 5V supply is used in the EIA-530 (V.11) mode.
varies with temperature and voltage when only a sin- This mode has the highest current consumption.
FIGURE 1. SUPPLY CURRENT VERSUS TEMPERATURE AND SUPPLY VOLTAGE, WITHOUT LOAD OR
SIGNAL IN EIA-530 (V.11) MODE
Supply Current, No Signal, No Load, All CH
154
152
150
148
146
144
142
140
- 20 0
25 50 70 85
Temperature ( C)
4.75V
5.00V
5.25V
29