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MAX3462ESA+T

P1-P3P4-P6P7-P9P10-P12P13-P14
General Description
The MAX3460–MAX3464 are high-speed differential
bus transceivers for RS-485 and RS-422 communica-
tions. They are designed to meet TIA/EIA-422-B,
TIA/EIA-485-A, V.11, and X.27 standards. The trans-
ceiver complies with the Profibus specification provid-
ing +2.1V output level with a 54Ω load, 20Mbps data
rate, and output skew less than 2ns. Each part contains
one three-state differential line driver and one differen-
tial input line receiver. The devices operate from a +5V
supply and feature true fail-safe circuitry, which guaran-
tees a logic-high receiver output when the receiver
inputs are open or shorted. This enables all receiver
outputs on a terminated bus to output logic highs when
all transmitters are disabled.
All devices feature a 1/4 standard unit load receiver
input impedance that allows 128 transceivers on the
bus. Driver and receiver propagation delays are guar-
anteed under 20ns for multidrop, clock distribution
applications. Drivers are short-circuit current limited
and are protected against excessive power dissipation
by thermal shutdown circuitry. The driver and receiver
feature active-high and active-low enables, respective-
ly, that can be connected together externally to serve
as a direction control.
Applications
High-Speed RS-485 Communications
High-Speed RS-422 Communications
Level Translators
Industrial-Control Local Area Networks
Profibus Applications
Features
♦ Recommended for Profibus Applications
♦ Guaranteed 20Mbps Data Rate
♦ 20ns Transmitter and Receiver Propagation Delay
♦ 2ns Transmitter and Receiver Skew
♦ High Differential Driver Output Level (2.1V on 54Ω)
♦ Hot-Swap Versions
♦ 1µA Shutdown Supply Current
♦ Low Supply Current Requirements (2.5mA typ)
♦ Allow Up to 128 Transceivers on the Bus
♦ True Fail-Safe Receiver while Maintaining EIA/TIA-
485 Compatibility
♦ Designed for Multipoint Transmissions on Long
or Noisy Bus Lines
♦ Full Duplex and Half Duplex Versions Available
♦ Phase Controls to Correct for Twisted-Pair
Reversal for 14-Pin Versions
♦ Current-Limiting and Thermal Shutdown for
Driver Overload Protection
MAX3460–MAX3464
+5V, Fail-Safe, 20Mbps, Profibus RS-485/
RS-422 Transceivers
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
PART
NUMBER
HALF/FULL
DUPLEX
RECEIVER/
DRIVER
ENABLE
LOW-
POWER
SHUTDOWN
HOT SWAP
RECEIVER/
DRIVER PHASE
SELECT
INDEPENDENT
SHDN PIN
PIN COUNT
MAX3460 Full Yes Yes Yes Yes Yes 14
MAX3461 Full Yes Yes No Yes Yes 14
MAX3462 Full No No No No No 8
MAX3463 Half Yes Yes Yes No No 8
MAX3464 Half Yes Yes No No No 8
Selector Guide
19-2217; Rev 1; 2/03
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Ordering Information continued at end of data sheet.
PART TEMP RANGE PIN-PACKAGE
MAX3460CSD 0°C to +70°C 14 SO
MAX3460CPD 0°C to +70°C 14 Plastic DIP
MAX3460ESD -40°C to +85°C 14 SO
MAX3460EPD -40°C to +85°C 14 Plastic DIP
Pin Configurations appear at end of data sheet.
MAX3460–MAX3464
+5V, Fail-Safe, 20Mbps, Profibus RS-485/
RS-422 Transceivers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +5V and T
A
= +25°C.) (Note 1)
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
) to GND ..................................-0.3V to +6V
Control Input Voltage (RE, DE, DI, SHDN, TXP, RXP)
to GND....................................................-0.3V to (V
CC
+ 0.3V)
Driver Output Voltage (Y, Z) to GND .........................-8V to +13V
Receiver Input Voltage (A, B) to GND.......................-8V to +13V
Differential Driver Output Voltage (Y - Z) ...............................±8V
Differential Receiver Input (A - B) ..........................................±8V
Receiver Output Voltage (RO) to GND.......-0.3V to (V
CC
+ 0.3V)
Output Driver Current (Y, Z) ...........................................±250mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
8-Pin DIP (derate 9.09mW/°C above +70°C)...............727mW
14-Pin SO (derate 8.33mW/°C above +70°C)..............667mW
14-Pin DIP (derate 10mW/°C above +70°C)................800mW
Operating Temperature Range
MAX346_C__ ......................................................0°C to +70°C
MAX346_E__....................................................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Power-Supply Range V
CC
4.75 5.25 V
DRIVER
Differential Driver Output (no load) V
OD
Figure 5, R = ∞ V
CC
V
Differential Driver Output V
OD
Figure 5, R = 27Ω 2.1 V
Change in Magnitude of
Differential Output Voltage
∆V
OD
Figure 5, R = 50Ω or 27Ω
(Note 2)
0.2 V
Driver Common-Mode Output
Voltage
V
OC
Figure 5, R = 50Ω or 27Ω 3V
Change in Magnitude of
Common-Mode Voltage
∆V
OC
Figure 5, R = 50Ω or 27Ω
(Note 2)
0.2 V
Input High Voltage V
IH
DE, DI, RE, SHDN 2.0 V
Input Low Voltage V
IL
DE, DI, RE, SHDN 0.8 V
Input Hysteresis V
HYS
DE, DI, RE, SHDN 50 mV
V
IN
= +12V +125
Output Leakage (Y and Z) Full
Duplex
I
O
DE = GND, V
CC
=
GND or +5.25V
V
IN
= -7V -100
µA
Input Current I
IN
DI, RE, DE, SHDN ±1µA
Pulldown Current RXP = TXP = V
CC
51530µA
0 ≤ V
OUT
≤ 12V, output low +250
Driver Short-Circuit Output
Current (Note 3)
I
OSD
-7V ≤ V
OUT
≤ V
CC
, output high -250
mA
(V
CC
- 1V) ≤ V
OUT
≤ 12V, output low +25
Driver Short-Circuit Foldback
Output Current (Note 3)
I
OSFD
-7V ≤ V
OUT
≤ 1V, output high -25
mA
Thermal Shutdown Threshold 140 °C
RECEIVER
Differential Input Capacitance C
A, B
8pF
V
IN
= +12V 250
Input Current (A and B) Full
Duplex
I
A, B
DE = GND,
V
CC
= GND or 5.25V
V
IN
= -7V -200
µA
Receiver Differential Threshold
Voltage
V
TH
-7V ≤ V
CM
≤ 12V -200 -125 -50 mV
MAX3460–MAX3464
+5V, Fail-Safe, 20Mbps, Profibus RS-485/
RS-422 Transceivers
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +5V and T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Receiver Input Hysteresis ∆V
TH
V
A
+ V
B
= 0 20 mV
Receiver Output High Voltage V
OH
I
O
= -4mA, V
A
- V
B
= V
TH
V
CC
- 1.5 V
Receiver Output Low Voltage V
OL
I
O
= 4mA, V
B
- V
A
= V
TH
0.4 V
Three-State Output Current at
Receiver
I
OZR
0 ≤ V
O
≤ V
CC
±1µA
Receiver Input Resistance R
IN
-7V ≤ V
CM
≤ 12V 48 kΩ
Receiver Output Short-Circuit
Current
I
OSR
0 ≤ V
RO
≤ V
CC
±7 ±95 mA
SUPPLY CURRENT
N or m al O p er ati on ( stati c cond i ti on) I
Q
No load, DI = V
CC
or DI = GND 2.5 4 mA
Supply Current in SHDN I
SHDN
DE = GND and RE = V
CC
, or SHDN = V
CC
110µA
SWITCHING CHARACTERISTICS
t
PLH
Driver Propagation Delay
t
PHL
Figures 6 and 7, R
DIFF
= 54Ω,
C
L
= 50pF
20 ns
t
R
Driver Differential Output Rise or
Fall Time
t
F
Figures 6 and 7, R
DIFF
= 54Ω,
C
L
= 50pF
20 ns
Driver Output Skew |t
PLH
- t
PHL
|t
SKEW
Figures 6 and 7, R
DIFF
= 54Ω,
C
L
= 50pF, TXP = GND or floating
2ns
Maximum Data Rate 20 Mbps
Driver Enable to Output High t
ZH
Figures 8 and 9, S2 closed, R
L
= 500Ω,
C
L
= 50pF
100 ns
Driver Enable to Output Low t
ZL
Figures 8 and 9, S1 closed, R
L
= 500Ω,
C
L
= 50pF
100 ns
Driver Disable Time from Low t
LZ
Figures 8 and 9, S1 closed, R
L
= 500Ω,
C
L
= 50pF
100 ns
Driver Disable Time from High t
HZ
Figures 8 and 9, S2 closed, R
L
= 500Ω,
C
L
= 50pF
100 ns
t
PLH
Receiver Propagation Delay
t
PHL
Figure 10, C
L
= 15pF (Note 4) 20 ns
Recei ver O utp ut S kew |t
PLH
- t
P H L
| t
SKEW
Figure 10, C
L
= 15pF, RXP = GND or
floating (Note 4)
2ns
Receiver Enable to Output Low t
ZL
Figures 8 and 11, R
L
= 1kΩ, C
L
= 15pF,
S1 closed (Note 4)
100 ns
Receiver Enable to Output High t
ZH
Figures 8 and 11, R
L
= 1kΩ, C
L
= 15pF,
S2 closed (Note 4)
100 ns
Receiver Disable Time from Low t
LZ
Figures 8 and 11, R
L
= 1kΩ, C
L
= 15pF,
S1 closed (Note 4)
100 ns
Receiver Disable Time from High t
HZ
Figures 8 and 11, R
L
= 1kΩ, C
L
= 15pF,
S2 closed (Note 4)
100 ns
P1-P3P4-P6P7-P9P10-P12P13-P14

MAX3462ESA+T

Mfr. #:
Buy MAX3462ESA+T
Manufacturer:
Maxim Integrated
Description:
RS-422/RS-485 Interface IC 5V Fail-Safe 20Mbps Profibus Tcv
Lifecycle:
New from this manufacturer.
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