MAX3466 MAXIM [Maxim Integrated Products], MAX3466 Datasheet

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MAX3466

Manufacturer Part Number
MAX3466
Description
+5V, Fail-Safe, 40Mbps, Profibus RS-485/ RS-422 Transceivers
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX3466CSD+
Manufacturer:
Maxim Integrated Products
Quantity:
135
Part Number:
MAX3466ESD+
Manufacturer:
Maxim
Quantity:
144
The MAX3465–MAX3469 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 minimum output level with a 54Ω load,
40Mbps data rate, and output skew less than 2ns. Each
part contains one three-state differential line driver and
one differential input line receiver. The devices operate
from a +5V supply and feature true fail-safe circuitry,
which guarantees 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.
19-3038; Rev 0; 10/03
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.
MAX3465
MAX3466
MAX3467
MAX3468
MAX3469
NUMBER
PART
High-Speed RS-485 Communications
High-Speed RS-422 Communications
Level Translators
Industrial-Control Local Area Networks
Profibus Applications
HALF/FULL
DUPLEX
________________________________________________________________ Maxim Integrated Products
+5V, Fail-Safe, 40Mbps, Profibus RS-485/
Half
Half
Full
Full
Full
General Description
RECEIVER/
ENABLE
DRIVER
Yes
Yes
Yes
Yes
No
Applications
SHUTDOWN
POWER
LOW-
Yes
Yes
Yes
Yes
No
HOT SWAP
Yes
Yes
o Recommended for Profibus Applications
o Up to 40Mbps Data Rate
o 15ns Transmitter Propagation Delay
o 20ns Receiver Propagation Delay
o 2ns Transmitter and Receiver Skew
o High Differential Driver Output Level (2.1V on 54Ω)
o Hot-Swap Versions
o 1µA Shutdown Supply Current
o Low Supply Current Requirements (2.5mA, typ)
o Allow Up to 128 Transceivers on the Bus
o True Fail-Safe Receiver while Maintaining EIA/TIA-
o Designed for Multipoint Transmissions on Long
o Full-Duplex and Half-Duplex Versions Available
o Phase Controls to Correct for Twisted-Pair
o Current-Limiting and Thermal Shutdown for
No
No
No
Ordering Information continued at end of data sheet.
Pin Configurations appear at end of data sheet.
MAX3465CSD
MAX3465CPD
MAX3465ESD
MAX3465EPD
485 Compatibility
or Noisy Bus Lines
Reversal for 14-Pin Versions
Driver Overload Protection
RS-422 Transceivers
PART
DRIVER PHASE
RECEIVER/
SELECT
Yes
Yes
No
No
No
-40°C to +85°C
-40°C to +85°C
Ordering Information
TEMP RANGE
0°C to +70°C
0°C to +70°C
INDEPENDENT
SHDN PIN
Selector Guide
Yes
Yes
No
No
No
PIN-PACKAGE
14 SO
14 Plastic DIP
14 SO
14 Plastic DIP
Features
PIN COUNT
14
14
8
8
8
1

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MAX3466 Summary of contents

Page 1

... Level Translators Industrial-Control Local Area Networks Profibus Applications RECEIVER/ PART HALF/FULL DRIVER NUMBER DUPLEX ENABLE MAX3465 Full Yes MAX3466 Full Yes MAX3467 Full No MAX3468 Half Yes MAX3469 Half Yes ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’ ...

Page 2

Fail-Safe, 40Mbps, Profibus RS-485/ RS-422 Transceivers ABSOLUTE MAXIMUM RATINGS Supply Voltage ( GND ..................................-0.3V to +6V CC Control Input Voltage (RE, DE, DI, SHDN, TXP, RXP) to GND....................................................-0. Driver Output Voltage ( GND ...

Page 3

Fail-Safe, 40Mbps, Profibus RS-485/ ELECTRICAL CHARACTERISTICS (continued +5V ±5 unless otherwise noted. Typical values are MIN MAX PARAMETER Receiver Differential Threshold Voltage Receiver Input Hysteresis Receiver Output ...

Page 4

Fail-Safe, 40Mbps, Profibus RS-485/ RS-422 Transceivers ELECTRICAL CHARACTERISTICS (continued +5V ±5 unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL Recei ver O utp ut S ...

Page 5

Fail-Safe, 40Mbps, Profibus RS-485 +5V +25°C, unless otherwise noted SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE 300 250 200 150 100 50 0 -40 - TEMPERATURE (°C) RECEIVER PROPAGATION DELAY vs. TEMPERATURE ...

Page 6

... A DRIVER AND RECEIVER PROPAGATION DELAYS MAX3465 toc13 DI 5V/div Y, Z 2V/div RO 5V/div R = 54Ω DATA RATE = 20Mbps DIFF 10ns/div PIN HALF FULL DUPLEX DUPLEX MAX3465/ MAX3468/ MAX3467 MAX3466 MAX3469 1 — — — — — — ...

Page 7

... Fail-Safe, 40Mbps, Profibus RS-485/ MAX3465/MAX3466 TRANSMITTING INPUTS SHDN RECEIVING INPUTS ≥ -0.05V 0 X ≤ -0. Open/Shorted _______________________________________________________________________________________ RS-422 Transceivers MAX3467 OUTPUTS ...

Page 8

... GND GND 7 8 TXP DIP/SO Figure 1. MAX3465/MAX3466 Pin Configuration and Typical Full-Duplex Operating Circuit TOP VIEW GND DIP/SO Figure 2. MAX3467 Pin Configuration and Typical Full-Duplex Operating Circuit ...

Page 9

... The MAX3465–MAX3469’s driver slew rates allow transmit speeds up to 40Mbps. The MAX3468 and MAX3469 are half-duplex trans- ceivers, while the MAX3465, MAX3466, and MAX3467 are full-duplex transceivers. All of these parts operate from a single +5V supply. Drivers are output short-cir- cuit current limited ...

Page 10

Fail-Safe, 40Mbps, Profibus RS-485/ RS-422 Transceivers Figure 5. Driver DC Test Load DIFF Figure 6. Driver Timing Test Circuit ≤ 3ns, t ≤ 3ns ...

Page 11

... Low-Power Shutdown Mode (Except MAX3467) Low-power shutdown mode is initiated by bringing SHDN high (MAX3465/MAX3466), or both RE high and DE low. In shutdown, the devices typically draw only 1µA of supply current. RE and DE can be driven simul- taneously; the devices are guaranteed not to enter shut- down high and DE is low for less than 50ns. If the inputs are in this state for at least 800ns, the devices are guaranteed to enter shutdown ...

Page 12

... MAX3468 MAX3469 (HALF-DUPLEX) Figure 13. Typical Half-Duplex RS-485 Network A 120Ω 120Ω NOTE: RE AND DE ON MAX3465/MAX3466/MAX3467 ONLY. Figure 14. Typical Full-Duplex RS-485 Network 12 ______________________________________________________________________________________ ...

Page 13

Fail-Safe, 40Mbps, Profibus RS-485/ (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages TOP VIEW FRONT VIEW ______________________________________________________________________________________ RS-422 ...

Page 14

Fail-Safe, 40Mbps, Profibus RS-485/ RS-422 Transceivers (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) Maxim cannot assume responsibility for use of any circuitry other ...

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