ISL32450E INTERSIL [Intersil Corporation], ISL32450E Datasheet

ISL32450E

Manufacturer Part Number

ISL32450E

Description

Manufacturer

INTERSIL [Intersil Corporation]

Datasheet

1.ISL32450E.pdf (21 pages)

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±60V Fault Protected, 3.3V to 5V, ±20V Common Mode

Range, RS-485/RS-422 Transceivers with Cable Invert

and ±15kV ESD

ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E

The ISL32450E through ISL32457E are 3.3V to 5V powered, fault

protected, extended common mode range differential transceivers

for balanced communication. The RS-485 bus pins (driver outputs

and receiver inputs) are protected against overvoltages up to

±60V, and against ±15kV ESD strikes. These transceivers operate

in environments with common mode voltages up to ±20V

(exceeds the RS-485 requirement), making this RS-485 family

one of the more robust on the market.

Transmitters are RS-485 compliant with V

1.1V differential output voltage into the RS-485 specified 54Ω

load even with V

Receiver (Rx) inputs feature a “Full Fail-Safe” design, which

ensures a logic-high Rx output if Rx inputs are floating, shorted, or

on a terminated but undriven (idle) bus. Rx full fail-safe operation

is maintained even when the Rx input polarity is switched (cable

invert function on ISL32457E).

The ISL32457E includes a cable invert function that reverses the

polarity of the Rx and Tx bus pins in case the cable is

misconnected during installation.

See Table 1 on page 2 for key features and configurations by

device number.

Related Literature

• See FN7784, “ISL32470E, ISL32472E, ISL32475E,

February 20, 2012

FN7921.0

ISL32478E: Fault Protected, Extended Common Mode Range,

RS-485/RS-422 Transceivers with ±16.5kV ESD”

FIGURE 1. EXCEPTIONAL ISL32453E RX OPERATES AT >1Mbps

EVEN WITH ±20V COMMON MODE VOLTAGE

= 3V.

TIME (200ns/DIV)

≥ 4.5V and deliver a

VID = ±1V

2Mbps

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

= 3V

1-888-INTERSIL or 1-888-468-3774

Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.

Features

• Fault Protected RS-485 Bus Pins . . . . . . . . . . . . . . Up to ±60V

• Extended Common Mode Range . . . . . . . . . . . . . . . . . . . ±20V

• ±15kV HBM ESD Protection on RS-485 Bus Pins

• Wide Supply Range . . . . . . . . . . . . . . . . . . . . . . . . . 3V to 5.5V

• Cable Invert Pin (ISL32457E Only)

• 1/4 Unit Load for Up to 128 Devices on the Bus

• High Transient Overvoltage Tolerance . . . . . . . . . . . . . . . ±80V

• Full Fail-safe (Open, Short, Terminated) RS-485 Receivers

• Choice of RS-485 Data Rates . . . . . . . . . . . . 250kbps or 1Mbps

• Low Quiescent Supply Current . . . . . . . . . . . . . . . . . . . 2.1mA

• Pb-Free (RoHS Compliant)

Applications

• Utility Meters/Automated Meter Reading Systems

• Air Conditioning Systems

• Security Camera Networks

• Building Lighting and Environmental Control Systems

• Industrial/Process Control Networks

Larger Than Required for RS-485

Corrects for Reversed Cable Connections While Maintaining Rx

Full Fail-safe Functionality

Ultra Low Shutdown Supply Current . . . . . . . . . . . . . . . 10µA

FIGURE 2. TRANSCEIVERS DELIVER SUPERIOR COMMON MODE

-20

-7

All other trademarks mentioned are the property of their respective owners.

STANDARD RS-485

RANGE vs STANDARD RS-485 DEVICES

TRANSCEIVER

ISL3245XE

Related parts for ISL32450E

ISL32450E Summary of contents

Page 1

... Range, RS-485/RS-422 Transceivers with Cable Invert and ±15kV ESD ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E The ISL32450E through ISL32457E are 3. powered, fault protected, extended common mode range differential transceivers for balanced communication. The RS-485 bus pins (driver outputs and receiver inputs) are protected against overvoltages up to ± ...

Page 2

... ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E PART HALF/FULL DATA RATE NUMBER DUPLEX (Mbps) ISL32450E Full 0.25 ISL32452E Half 0.25 ISL32453E Full 1 ISL32455E Half 1 ISL32457E Half 0.25 Ordering Information PART NUMBER (Notes ISL32450EIBZ ISL32450 EIBZ ISL32450EIUZ 2450E ISL32452EIBZ 32452 EIBZ ISL32452EIUZ 2452E ISL32453EIBZ ISL32453 EIBZ ...

Page 3

... ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Pin Configurations ISL32450E, ISL32453E (14 LD SOIC) TOP VIEW GND 6 GND 7 ISL32452E, ISL32455E (8 LD SOIC MSOP) TOP VIEW NOTE: Evaluate creepage and clearance requirements at your maximum fault voltage before using small pitch packages (e.g., MSOP). ...

Page 4

... ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Pin Descriptions ISL32452E, ISL32450E, ISL32450E, ISL32455E ISL32453E, ISL32453E SOIC, PIN (14 LD SOIC) (10 LD MSOP MSOP) NAME PIN # PIN # GND A/Y N/A N/A B/Z N/A N ...

Page 5

... THE IC ON THE LEFT HAS THE CABLE CONNECTIONS GND SWAPPED, SO THE INV PIN IS STRAPPED HIGH TO 5 INVERT THE RX AND TX POLARITY ISL32457E HALF DUPLEX NETWORK USING CABLE INVERT FUNCTION 5 + 0.1µ SOIC PINOUT SHOWN ISL32450E, ISL32453E FULL DUPLEX NETWORK + 0.1µ ISL32452E, ISL32455E HALF DUPLEX NETWORK + 0.1µ ...

Page 6

... ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Absolute Maximum Ratings V to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V CC Input Voltages DI, DE, RE, INV -0. Input/Output Voltages A/Y, B/ ±60V A/Y, B/ (Transient Pulse Through 100Ω, Note ±80V RO -0. Short Circuit Duration Indefinite ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . see “Electrical Specifications” ...

Page 7

... No-Load Supply Current (Note 10 Shutdown Supply Current (Note 19) I SHDN ESD PERFORMANCE All Pins RS-485 Pins ( A/Y, B/Z) DRIVER SWITCHING CHARACTERISTICS (250kbps VERSIONS; ISL32450E, ISL32452E, ISL32457E) Driver Differential Output Delay t PLH, Driver Differential Output Skew t SKEW Driver Differential Rise or Fall Time t R ...

Page 8

... HZ Time to Shutdown t SHDN Driver Enable from Shutdown to t ZH(SHDN) Output High Driver Enable from Shutdown to t ZL(SHDN) Output Low RECEIVER SWITCHING CHARACTERISTICS (250kbps VERSIONS; ISL32450E, ISL32452E, ISL32457E) Maximum Data Rate f MAX Receiver Input to Output Delay PLH Receiver Skew | PLH ...

Page 9

... ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Electrical Specifications Test Conditions 3.3V +25°C (Note 9). Boldface limits apply over the operating temperature range, -40°C to +85° PARAMETER SYMBOL Receiver Skew | PLH PHL SKD Receiver Enable to Output Low t ZL Receiver Enable to Output High ...

Page 10

... ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Test Circuits and Waveforms SIGNAL GENERATOR FIGURE 4A. TEST CIRCUIT FIGURE 4. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES SIGNAL Y GENERATOR PARAMETER OUTPUT Y/Z 0 (Note 12 Y/Z 0 (Note 12 Y/Z 1 (Note 15) ...

Page 11

... ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Test Circuits and Waveforms SIGNAL SIGNAL GENERATOR GENERATOR +1.5V FIGURE 7A. TEST CIRCUIT SIGNAL GENERATOR PARAMETER (Note 13 (Note 13 (Note 16) 0 ZH(SHDN) t (Note 16) 0 ZL(SHDN) FIGURE 8A. TEST CIRCUIT ...

Page 12

... The ±60V (referenced to the IC GND) fault protection on the RS-485 pins makes these transceivers some of the most rugged on the market. This level of protection makes the ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E ideal for applications in which power (e.g., 24V and 48V supplies) must be routed in the conduit with the data lines and for outdoor applications where large transients are likely to occur ...

Page 13

... ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E The ISL32457E simplifies this task by including a cable invert pin (INV) that allows the technician to invert the polarity of the Rx input and the Tx output pins simply by moving a jumper to change the state of the invert pin. When the invert pin is low, the ...

Page 14

... ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Typical Performance Curves 20Ω 30Ω +25°C 60 +85°C +25° +85° 3. 0.5 1 1.5 2 2.5 DIFFERENTIAL OUTPUT VOLTAGE (V) FIGURE 9. DRIVER OUTPUT CURRENT vs DIFFERENTIAL OUTPUT VOLTAGE 2 2 2.0 1 1.8 1 3.3V 1 3.3V CC 1.4 -40 -30 -20 -10 ...

Page 15

... 3. 3. -10 -15 A -20 B TIME (1µs/DIV) FIGURE 19. ±20V RECEIVER PERFORMANCE (ISL32450E, ISL32452E, ISL32457E +25 °C ; Unless Otherwise Specified. (Continued 54Ω 50pF PHL 5 t PLH ...

Page 16

... ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Typical Performance Curves A TIME (1µs/DIV) FIGURE 21 3.3V, DRIVER AND RECEIVER WAVEFORMS CC (ISL32450E, ISL32452E, ISL32457E A TIME (1µs/DIV) FIGURE 23 5V, DRIVER AND RECEIVER WAVEFORMS CC (ISL32450E, ISL32452E, ISL32457E) 2 ...

Page 17

... Intersil product families. For a complete listing of Applications, Related Documentation and Related Parts, please see the respective device information page on intersil.com: ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E To report errors or suggestions for this datasheet, please go to FITs are available from our website at http://rel ...

Page 18

... ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Package Outline Drawing M8.118 8 LEAD MINI SMALL OUTLINE PLASTIC PACKAGE Rev 4, 7/11 3.0±0. PIN TOP VIEW H 0.25 - 0.36 0. SIDE VIEW 1 (5.80) (4.40) (3.00) (0.65) TYPICAL RECOMMENDED LAND PATTERN 1.10 MAX 4.9±0.15 3.0±0.05 5 0.65 BSC 0.85±010 C SEATING PLANE 0.10 C 0.10 ± 0.05 NOTES: 1 ...

Page 19

... ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Package Outline Drawing M8.15 8 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE Rev 4, 1/12 INDEX AREA TOP VIEW 5.00 (0.197) 4.80 (0.189) 1.27 (0.050) 0.51(0.020) 0.33(0.013) SIDE VIEW “A 19 DETAIL "A" 6.20 (0.244) 5.80 (0.228) 4.00 (0.157) 3.80 (0.150) 8° 0° 1 SEATING PLANE 1.75 (0.069 ...

Page 20

... ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Mini Small Outline Plastic Packages (MSOP -B- INDEX 1 2 0.20 (0.008) AREA TOP VIEW 0.25 (0.010) GAUGE PLANE SEATING PLANE - 0.10 (0.004) b -H- - 0.20 (0.008) SIDE VIEW 0.20 (0.008) NOTES: 1. These package dimensions are within allowable dimensions of JEDEC MO-187BA ...

Page 21

... ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Package Outline Drawing M14.15 14 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE Rev 1, 10/09 14 3 PIN NO.1 ID MARK 5 0.31-0.51 0. A-B D TOP VIEW 1.75 MAX 1.27 SIDE VIEW (1.27) (5.40) TYPICAL RECOMMENDED LAND PATTERN 21 4 0.10 C A 6.0 0. 1.25 MIN ...

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