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MAX3491ESD-T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
AVAILABLE
Functional Diagrams
Pin Configurations appear at end of data sheet.
Functional Diagrams continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and
ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
_______________General Description
The MAX3483, MAX3485, MAX3486, MAX3488,
MAX3490, and MAX3491 are 3.3V, low-power trans-
ceivers for RS-485 and RS-422 communication. Each
part contains one driver and one receiver. The
MAX3483 and MAX3488 feature slew-rate-limited dri-
vers that minimize EMI and reduce reflections caused
by improperly terminated cables, allowing error-free
data transmission at data rates up to 250kbps. The par-
tially slew-rate-limited MAX3486 transmits up to
2.5Mbps. The MAX3485, MAX3490, and MAX3491
transmit at up to 10Mbps.
Drivers are short-circuit current limited and are protect-
ed against excessive power dissipation by thermal
shutdown circuitry that places the driver outputs into a
high-impedance state. The receiver input has a fail-safe
feature that guarantees a logic-high output if both
inputs are open circuit.
The MAX3488, MAX3490, and MAX3491 feature full-
duplex communication, while the MAX3483, MAX3485,
and MAX3486 are designed for half-duplex communi-
cation.
________________________Applications
Low-Power RS-485/RS-422 Transceivers
Telecommunications
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
____________________________Features
♦ Operate from a Single 3.3V Supply—
No Charge Pump!
♦ Interoperable with +5V Logic
♦ 8ns Max Skew (MAX3485/MAX3490/MAX3491)
♦ Slew-Rate Limited for Errorless Data Transmission
(MAX3483/MAX3488)
♦ 2nA Low-Current Shutdown Mode
(MAX3483/MAX3485/MAX3486/MAX3491)
♦ -7V to +12V Common-Mode Input Voltage Range
♦ Allows up to 32 Transceivers on the Bus
♦ Full-Duplex and Half-Duplex Versions Available
♦ Industry Standard 75176 Pinout
(MAX3483/MAX3485/MAX3486)
♦ Current-Limiting and Thermal Shutdown for
Driver Overload Protection
______________Ordering Information
Ordering Information continued at end of data sheet.
* Contact factory for for dice specifications.
3.3V-Powered, 10Mbps and Slew-Rate-Limited
True RS-485/RS-422 Transceivers
19-0333; Rev 0; 12/94
PART
MAX3483CPA
MAX3483CSA
MAX3483C/D 0°C to +70°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE PIN-PACKAGE
8 Plastic DIP
8 SO
Dice*
PART
NUMBER
GUARANTEED
DATA RATE
(Mbps)
SUPPLY
VOLTAGE
(V)
HALF/FULL
DUPLEX
SLEW-RATE
LIMITED
DRIVER/
RECEIVER
ENABLE
SHUTDOWN
CURRENT
(nA)
PIN
COUNT
MAX3483
0.25 Half Yes Yes 2 8
MAX3485
10 Half No Yes 2 8
MAX3486
2.5 Half Yes Yes 2 8
MAX3488
0.25 Full Yes No — 8
MAX3490
10 Full No No — 8
MAX3491
10
3.0 to 3.6
Full No Yes 2 14
______________________________________________________________Selection Table
MAX3483EPA
MAX3483ESA -40°C to +85°C
-40°C to +85°C 8 Plastic DIP
8 SO
MAX3485CPA
MAX3485CSA
MAX3485C/D 0°C to +70°C
0°C to +70°C
0°C to +70°C 8 Plastic DIP
8 SO
Dice*
MAX3485EPA
MAX3485ESA -40°C to +85°C
-40°C to +85°C 8 Plastic DIP
8 SO
MAX3483/MAX3485/MAX3486/
MAX3488/MAX3490/MAX3491
3.3V-Powered, 10Mbps and Slew-Rate-Limited
True RS-485/RS-422 Transceivers
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 3.3V ±0.3V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Supply Voltage (V
CC
)...............................................................7V
Control Input Voltage (RE
, DE) ...................................-0.3V to 7V
Driver Input Voltage (DI) .............................................-0.3V to 7V
Driver Output Voltage (A, B, Y, Z)..........................-7.5V to 12.5V
Receiver Input Voltage (A, B) ................................-7.5V to 12.5V
Receiver Output Voltage (RO)....................-0.3V to (V
CC
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) .....727mW
8-Pin SO (derate 5.88mW/°C above +70°C)..................471mW
14-Pin Plastic DIP (derate 10mW/°C above +70°C) ......800mW
14-Pin SO (derate 8.33mW/°C above +70°C)................667mW
Operating Temperature Ranges
MAX34_ _C_ _.......................................................0°C to +70°C
MAX34_ _E_ _....................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
DE = 0V,
V
CC
= 0V or 3.6V
DE = 0V, RE = V
CC
,
V
CC
= 0V or 3.6V, MAX3491
DE = 0V, RE = 0V,
V
CC
= 0V or 3.6V, MAX3491
kΩ12R
IN
Receiver Input Resistance
µA±1I
OZR
Three-State (High Impedance)
Output Current at Receiver
V0.4V
OL
Receiver Output Low Voltage
VV
CC
- 0.4V
OH
Receiver Output High Voltage
mV50∆V
TH
Receiver Input Hysteresis
V-0.2 0.2V
TH
Receiver Differential
Threshold Voltage
µA
-1
I
O
Output Leakage (Y, Z)
in Shutdown Mode
1
µA
-20
I
O
Output Leakage (Y, Z)
V0.2∆V
OD
Change in Magnitude of Driver
Differential Output Voltage for
Complementary Output States
(Note 1)
V
1.5
V
OD
2.0
Differential Driver Output
20
mA
-0.8
I
IN2
Input Current (A, B)
1.0
µA±2I
IN1
Logic Input Current
V3V
OC
Driver Common-Mode Output
Voltage
V0.2∆V
OC
Change in Magnitude of
Common-Mode Output Voltage
(Note 1)
V2.0V
IH
Input High Voltage
V0.8V
IL
Input Low Voltage
UNITSMIN TYP MAXSYMBOLPARAMETER
R
L
= 54Ω or 100Ω, Figure 4
-7V ≤ V
CM
≤ 12V
R
L
= 54Ω (RS-485), Figure 4
V
CC
= 3.6V, 0V ≤ V
OUT
≤ V
CC
R
L
= 100Ω (RS-422), Figure 4
I
OUT
= 2.5mA, V
ID
= 200mV, Figure 6
I
OUT
= -1.5mA, V
ID
= 200mV, Figure 6
V
CM
= 0V
V
OUT
= 12V
V
IN
= -7V
-7V ≤ V
CM
≤ 12V
V
OUT
= -7V
V
IN
= 12V
DE, DI, RE
R
L
= 54Ω or 100Ω, Figure 4
R
L
= 54Ω or 100Ω, Figure 4
DE, DI, RE
V
OUT
= 12V
DE, DI, RE
V
OUT
= -7V
CONDITIONS
R
L
= 60Ω (RS-485), V
CC
= 3.3V, Figure 5
1.5
MAX3483/MAX3485/MAX3486/
MAX3488/MAX3490/MAX3491
2
Maxim Integrated
3.3V-Powered, 10Mbps and Slew-Rate-Limited
True RS-485/RS-422 Transceivers
No load,
DI = 0V or V
CC
µA0.002 1I
SHDN
Supply Current in Shutdown Mode
0.95 1.9
mA
1.1 2.2
I
CC
Supply Current
mA
-250
I
OSD
250
Driver Short-Circuit Output
Current
mA±8 ±60I
OSR
Receiver Short-Circuit Output
Current
UNITSMIN TYP MAXSYMBOLPARAMETER
DE = 0V, RE = V
CC
, DI = V
CC
or 0V
DE = 0V,
RE = 0V
DE = V
CC
,
RE = 0V or V
CC
V
OUT
= -7V
V
OUT
= 12V
0V ≤ V
RO
≤ V
CC
CONDITIONS
DC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 3.3V ±0.3V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C)
ns72235t
PLH
Driver Propagation Delay, Low-to-High Level
ns3825t
TD
ns12235t
DD
Driver Differential Output Delay
Driver Differential Output Transition Time
ns650 900t
PSH
Driver Output Enable Time from Shutdown to High Level
ns650 900t
PSL
Driver Output Enable Time from Shutdown to Low Level
ns40 80t
PHZ
Driver Output Disable Time from High Level
ns72235t
PHL
Driver Propagation Delay, High-to-Low Level
ns8t
PDS
|
t
PLH
- t
PHL|
Driver Propagation Delay Skew (Note 2)
ns45 90t
PZL
Driver Output Enable Time to Low Level
ns45 90t
PZH
Driver Output Enable Time to High Level
UNITSMIN TYP MAXSYMBOLPARAMETER
R
L
= 27Ω, Figure 8
R
L
= 60Ω, Figure 7
R
L
= 60Ω, Figure 7
R
L
= 110Ω, Figure 9
R
L
= 110Ω, Figure 10
R
L
= 110Ω, Figure 9
R
L
= 27Ω, Figure 8
R
L
= 27Ω, Figure 8
R
L
= 110Ω, Figure 10
R
L
= 110Ω, Figure 9
CONDITIONS
DRIVER SWITCHING CHARACTERISTICS—MAX3485, MAX3490, and MAX3491
(V
CC
= 3.3V, T
A
= +25°C)
ns40 80t
PLZ
Driver Output Disable Time from Low Level R
L
= 110Ω, Figure 10
DRIVER SWITCHING CHARACTERISTICS—MAX3486
(V
CC
= 3.3V, T
A
= +25°C)
ns45 80t
PLZ
Driver Output Disable Time from Low Level R
L
= 110Ω, Figure 10
ns20 48 70t
PLH
Driver Propagation Delay, Low-to-High Level
ns15 35 60t
TD
ns24 48 70t
DD
Driver Differential Output Delay
Driver Differential Output Transition Time
ns700 1000t
PSH
Driver Output Enable Time from Shutdown to High Level
ns700 1000t
PSL
Driver Output Enable Time from Shutdown to Low Level
ns45 80t
PHZ
Driver Output Disable Time from High Level
ns20 48 70t
PHL
Driver Propagation Delay, High-to-Low Level
ns11t
PDS
|
t
PLH
- t
PHL|
Driver Propagation Delay Skew (Note 2)
ns55 100t
PZL
Driver Output Enable Time to Low Level
ns55 100t
PZH
Driver Output Enable Time to High Level
UNITSMIN TYP MAXSYMBOLPARAMETER
R
L
= 27Ω, Figure 8
R
L
= 60Ω, Figure 7
R
L
= 60Ω, Figure 7
R
L
= 110Ω, Figure 9
R
L
= 110Ω, Figure 10
R
L
= 110Ω, Figure 9
R
L
= 27Ω, Figure 8
R
L
= 27Ω, Figure 8
R
L
= 110Ω, Figure 10
R
L
= 110Ω, Figure 9
CONDITIONS
DRIVER OUTPUT ENABLE/DISABLE TIMES (MAX3485/MAX3491 only)
Maxim Integrated
3
MAX3483/MAX3485/MAX3486/
MAX3488/MAX3490/MAX3491
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

MAX3491ESD-T

Mfr. #:
Buy MAX3491ESD-T
Manufacturer:
Maxim Integrated
Description:
RS-422/RS-485 Interface IC 3.3V Powered, 10Mbps and Slew-Rate Limited, True RS-485/RS-422 Transceivers
Lifecycle:
New from this manufacturer.
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