MAX14945 Datasheet, PDF (3/21 Pages) Maxim Integrated Products – 2.75kVRMS Isolated 500kbps Half-Duplex RS-485

MAX14945
2.75kV_RMS Isolated 500kbps Half-Duplex RS-485/
RS-422 Transceiver with ±30kV ESD Protection
DC Electrical Characteristics (continued)
(V_DDA – V_GNDA = 1.71V to 5.5V, V_DDB – V_GNDB = 4.5V to 5.5V, T_A = T_MIN to T_MAX, unless otherwise noted. Typical values are at
V_DDA – V_GNDA = 3.3V, V_DDB – V_GNDB = 5V, V_GNDA = V_GNDB, and T_A = +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
Dropout Voltage
VLDO = 4.68V, IDDB = -120mA
Load Capacitance
Nominal value
LOGIC INTERFACE (TXD, RXD, DE, RE, SBA)
Input High Voltage
2.25V ≤ V_DDA ≤
VIH
RE, TXD, DE to
GNDA
5.5V
1.71V ≤ V_DDA ≤
1.89V
Input Low Voltage
2.25V ≤ V_DDA ≤
VIL
RE, TXD, DE to
GNDA
5.5V
1.71V ≤ V_DDA ≤
1.89V
Input Hysteresis
Input Capacitance
Input Pullup Current
Input Pulldown Current
SBA Pullup Resistance
VHYS
CIN
IPU
IPD
RSBA
RE, TXD, DE to GNDA
RE, TXD, DE, f = 1MHz
TXD
DE, RE
Output Voltage High
VOH
RXD to GNDA, IOUT = -4mA
Output Voltage Low
VOL
RXD to GNDA, IOUT = 4mA
SBA to GNDA, IOUT = 4mA
Short-Circuit Output Pullup
Current
Short-Circuit Output Pulldown
Current
Three-State Output Current
DRIVER
Differential Driver Output
Change in Magnitude of
Differential Driver Output Voltage
Driver Common Mode Output
Voltage
ISH_PU
ISH_PD
IOZ
|VOD|
ΔV_OD
VOC
0V ≤ V_RXD ≤ V_DDA, RE = low
0V ≤ V_RXD ≤ V_DDA, RE = low
0V ≤ V_SBA ≤ V_DDA, side B is pow-
ered and working
0V ≤ V_RXD ≤ V_DDA, RE = high
RL = 54Ω, TXD = high or low,
Figure 1a
RL = 100Ω, TXD = high or low,
Figure 1a
-7V ≤ V_CM ≤ +12V, Figure 1b
RL = 54Ω (Note 5)
RL = 54Ω
MIN
TYP MAX
100
180
1
10
0.7 x
VDDA
0.78 x
VDDA
0.8
0.6
220
2
-10
-4.5
-1.5
1.5
4.5
10
3
5
8
VDDA
-0.4
0.40
0.45
-42
+40
+60
-1
+1
2
3
1.5
5
0.2
V_DDB/2
3
UNITS
mV
µF
V
V
mV
pF
µA
µA
kΩ
V
V
mA
mA
µA
V
V
V
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