Datasheet

(V
CC
= 3.3V ±0.3V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Di󰀨erential Driver Output V
OD
R
L
= 100Ω (RS-422), Figure 4 2.0
VR
L
= 54Ω (RS-485), Figure 4 1.5
R
L
= 60Ω (RS-485), V
CC
= 3.3V, Figure 5 1.5
Change in Magnitude of Driver
Di󰀨erential Output Voltage for
Complementary Output States
(Note 1)
ΔV
OD
R
L
= 54Ω or 100Ω, Figure 4 0.2 V
Driver Common-Mode Output
Voltage
V
OC
R
L
= 54Ω or 100Ω, Figure 4 3 V
Change in Magnitude of
Common-Mode Output Voltage
(Note 1)
ΔV
OC
R
L
= 54Ω or 100Ω, Figure 4 0.2 V
Input High Voltage V
IH
DE, DI, RE 2.0 V
Input Low Voltage V
IL
DE, DI, RE 0.8 V
Logic Input Current I
IN1
DE, DI, RE ±2 μA
Input Current (A, B) I
IN2
DE = 0V,
V
CC
= 0V or 3.6V
V
IN
= 12V 1.0
mA
V
IN
= -7V -0.8
Output Leakage (Y, Z) I
O
DE = 0V, RE = 0V,
V
CC
= 0V or 3.6V, MAX3491
V
OUT
= 12V 20
μA
V
OUT
= -7V -20
Output Leakage (Y, Z)
in Shutdown Mode
I
O
DE = 0V, RE = V
CC
,
V
CC
= 0V or 3.6V, MAX3491
V
OUT
= 12V 1
μA
V
OUT
= -7V -1
Receiver Di󰀨erential
Threshold Voltage
V
TH
-7V ≤ V
CM
≤ 12V -0.2 0.2 V
Receiver Input Hysteresis ΔV
TH
V
CM
= 0V 50 mV
Receiver Output High Voltage V
OH
I
OUT
= -1.5mA, V
ID
= 200mV, Figure 6 V
CC
- 0.4 V
Receiver Output Low Voltage V
OL
I
OUT
= 2.5mA, V
ID
= 200mV, Figure 6 0.4 V
Three-State (High Impedance)
Output Current at Receiver
I
OZR
V
CC
= 3.6V, 0V ≤ V
OUT
≤ V
CC
±1 μA
Receiver Input Resistance R
IN
-7V ≤ V
CM
≤ 12V 12 kΩ
Supply Current I
CC
No load,
DI = 0V or V
CC
DE = V
CC
,
RE = 0V or V
CC
1.1 2.2
mA
DE = 0V,
RE = 0V
0.95 1.9
Supply Current in Shutdown
Mode
I
SHDN
DE = 0V, RE = V
CC
, DI = V
CC
or 0V 0.002 1 µA
Driver Short-Circuit Output
Current
I
OSD
V
OUT
= -7V -250
mA
V
OUT
= 12V 250
Receiver Short-Circuit Output
Current
I
OSR
0V ≤ V
RO
≤ V
CC
±8 ±60 mA
MAX3483/MAX3485/
MAX3486/MAX3488/
MAX3490/MAX3491
3.3V-Powered, 10Mbps and Slew-Rate-Limited
True RS-485/RS-422 Transceivers
www.maximintegrated.com
Maxim Integrated │ 3
DC Electrical Characteristics