ISL41334IRZ-T7A Intersil, ISL41334IRZ-T7A Datasheet

ISL41334IRZ-T7A

Manufacturer Part Number

ISL41334IRZ-T7A

Description

IC TXRX RS232/485 DL 2PRT 40QFN

Manufacturer

Intersil

Datasheet

1.ISL81334IAZ-T.pdf (28 pages)

Specifications of ISL41334IRZ-T7A

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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Protocol (RS-232/RS-485) Transceivers

The ISL81334, ISL41334 are two port interface ICs where

each port can be independently configured as a single

RS-485, RS-422 transceiver, or as a dual (2 Tx, 2 Rx) RS-

232 transceiver. With both ports set to the same mode, two

RS-485, RS-422 transceivers, or four RS-232 transceivers

are available.

If either port is in RS-232 mode, the onboard charge pump

generates RS-232 compliant ±5V Tx output levels from a

single V

capacitors are required for the charge pump. The

transceivers are RS-232 compliant, with the Rx inputs

handling up to ±25V, and the Tx outputs handling ±12V.

In RS-485 mode, the transceivers support both the RS-485

and RS-422 differential communication standards. The

receivers feature "full failsafe" operation, so the Rx outputs

remain in a high state if the inputs are open or shorted

together. The transmitters support up to three data rates, two

of which are slew rate limited for problem free

communications. The charge pump disables when both

ports are in RS-485 mode, thereby saving power, minimizing

noise, and eliminating the charge pump capacitors.

Both RS-232 and RS-485 modes feature loopback and

shutdown functions. Loopback internally connects the Tx

outputs to the corresponding Rx input, to facilitate board

level self test implementation. The outputs remain connected

to the loads during loopback, so connection problems (e.g.,

shorted connectors or cables) can be detected. Shutdown

mode disables the Tx and Rx outputs, disables the charge

pumps, and places the IC in a low current (µA) mode.

The ISL41334 is a QFN packaged device that includes two

additional user selectable, lower speed and edge rate

options for EMI sensitive designs, or to allow longer bus

lengths. It also features a logic supply pin (V

inputs, to be compatible with another supply voltage in mixed

voltage systems. The QFN also adds active low Rx enable

pins to increase design flexibility, allowing Tx/Rx direction

control, via a single signal per port, by connecting the

corresponding DE and RXEN pins together.

For a single port version of these devices, please see the

ISL81387, ISL41387 data sheet.

ISL81334

ISL41334

PART NUMBER

15kV ESD Protected, 5V, Two Port, Dual

level of logic outputs, and the switching points of logic

supply as low as 4.5V. Four small 0.1µF

NO. OF

PORTS

28 Ld SOIC, 28 Ld SSOP

40 Ld QFN (6mmx6mm)

PACKAGE OPTIONS

Data Sheet

) that sets the

TABLE 1. SUMMARY OF FEATURES

20M, 460k, 115k

RS-485 DATA

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

RATE (bps)

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

20M

Features

• ±15kV (HBM) ESD Protected Bus Pins (RS-232 or

• Two Independent Ports, Each User Selectable for RS-232

• Single 5V (10% Tolerance) Supply

• Flow-Through Pinouts Simplify Board Layouts

• Pb-Free (RoHS Compliant)

• Large (2.7V) Differential V

• Full Failsafe (Open/Short) Rx in RS-485, RS-422 Mode

• Loopback Mode Facilitates Board Self Test Functions

• User Selectable RS-485 Data Rates (ISL41334 Only)

• Fast RS-232 Data Rate . . . . . . . . . . . . . . . Up to 650kbps

• Low Current Shutdown Mode. . . . . . . . . . . . . . . . . . .42µA

• QFN Package Saves Board Space (ISL41334 Only)

• Logic Supply Pin (V

Applications

• Gaming Applications (e.g., Slot Machines)

• Single Board Computers

• Factory Automation

• Security Networks

• Industrial/Process Control Networks

• Level Translators (e.g., RS-232 to RS-422)

• Point of Sale Equipment

• Dual Channel RS-485 Interfaces

RS-232 DATA

RATE (kbps)

November 21, 2007

RS-485)

(2 Transceivers) or RS-485, RS-422 (1 Transceiver)

Immunity in RS-485, RS-422 Networks

- Fast Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Mbps

- Slew Rate Limited. . . . . . . . . . . . . . . . . . . . . . . 460kbps

- Slew Rate Limited. . . . . . . . . . . . . . . . . . . . . . . 115kbps

Systems (ISL41334 Only)

650

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

Intersil (and design) is a registered trademark of Intersil Americas Inc.

YES

PIN?

ISL81334, ISL41334

) Eases Operation in Mixed Supply

OUT

ACTIVE H or L

Rx ENABLE?

for Improved Noise

NONE

SHUTDOWN?

LOW POWER

FN6202.3

YES

Related parts for ISL41334IRZ-T7A

ISL41334IRZ-T7A Summary of contents

Page 1

... CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. | 1-888-INTERSIL or 1-888-468-3774 Intersil (and design registered trademark of Intersil Americas Inc. All other trademarks mentioned are the property of their respective owners. ISL81334, ISL41334 FN6202.3 for Improved Noise ...

Page 2

... ISL81334IBZ-T* ISL81334IBZ ISL41334IRZ 41334 IRZ ISL41334IRZ-T* 41334 IRZ *Please refer to TB347 for details on reel specifications. NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate PLUS ANNEAL - e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations. ...

Page 3

INPUTS SEL1 or 2 ON/OFF N. NOTE: 1. Charge pumps are off iff SEL1 = SEL2 = ON/OFF = ...

Page 4

INPUTS SEL1 or 2 ON/OFF SPA SPB ...

Page 5

Pin Descriptions PIN MODE GND BOTH Ground connection. LB BOTH Enables loopback mode when low. Internally pulled-high. NC BOTH No Connection. ON/OFF BOTH If either port is in RS-232 mode, a low on ON/OFF disables the charge pumps. In either ...

Page 6

Typical Operating Circuit RS-232 MODE WITHOUT LOOPBACK +5V + 0.1µ C1 0.1µ C2+ + 0.1µ 5kΩ 5kΩ ...

Page 7

... Ld SOIC Package (Note SSOP Package (Note QFN Package (Note 4 Maximum Junction Temperature (Plastic Package +150°C Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below + 0.5V) http://www.intersil.com/pbfree/Pb-FreeReflow.asp CC + 0.5V) L Operating Conditions Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C = 4.5V to 5.5V 0.1µ ...

Page 8

Electrical Specifications Test Conditions: V Typicals are at V PARAMETER SYMBOL Input Low Voltage V IL1 V IL2 V IL3 Input Current I IN1 I IN2 DC CHARACTERISTICS - RS-485 RECEIVER INPUTS (SEL = V Receiver Differential Threshold V Voltage ...

Page 9

Electrical Specifications Test Conditions: V Typicals are at V PARAMETER SYMBOL RS-232 DRIVER AND RECEIVER SWITCHING CHARACTERISTICS (SEL = GND, ALL VERSIONS AND SPEEDS) Driver Output Transition Region SR Slew Rate Driver Output Transition Time t r Driver Propagation Delay ...

Page 10

Electrical Specifications Test Conditions: V Typicals are at V PARAMETER SYMBOL Driver Maximum Data Rate f MAX RS-485 DRIVER SWITCHING CHARACTERISTICS (SLOW DATA RATE (115kbps, QFN ONLY), SEL = V Driver Differential Input to Output t DLH Delay t DHL ...

Page 11

Test Circuits and Waveforms SIGNAL GENERATOR FIGURE 2A. TEST CIRCUIT FIGURE 2. RS-485 DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES 11 ISL81334, ISL41334 ...

Page 12

Test Circuits and Waveforms SIGNAL Z GENERATOR C L FOR SHDN TESTS, SWITCH ON/OFF RATHER THAN DE PARAMETER ON/DE OUTPUT DY t 1/- Y/Z 0 1/- Y/Z 1 1/- Y/Z 0/1 ZH ...

Page 13

Test Circuits and Waveforms D Y SIGNAL GENERATOR FIGURE 6A. TEST CIRCUIT FIGURE 6. RS-232 DRIVER PROPAGATION DELAY AND TRANSITION TIMES RXEN (QFN ONLY SIGNAL GENERATOR FIGURE 7A. TEST CIRCUIT ...

Page 14

RS-422 is typically a point-to-point (one driver talking to one receiver on a bus point-to-multipoint (multidrop) standard that allows only one driver and receivers on each bus. Because of the one driver per bus limitation, ...

Page 15

RS-232 Mode RX FEATURES RS-232 receivers invert and convert RS-232 input levels (±3V to ±25V) to the standard TTL/CMOS levels required by a UART, ASIC, or µcontroller serial port. Receivers are designed to operate at faster data rates than the ...

Page 16

SSOP) receiver outputs are not independently tri-statable. ISL41334 (QFN) receiver outputs are tri-statable via an active low RXEN input for each port (see “ISL41334 (QFN Package) Special Features” on page 17 for more details). TX FEATURES The RS-485, RS-422 driver ...

Page 17

High ESD All pins on the ISL81334, ISL41334 include ESD protection structures rated at ±4kV (HBM), which is good enough to survive ESD events commonly seen during manufacturing. But the bus pins (Tx outputs and Rx inputs) are particularly vulnerable ...

Page 18

V might not exceed the V OH powered dual protocol input. Connecting the V power supply of the logic device (as shown in Figure 12) limits the ISL41334’s Rx output and reduces ...

Page 19

RS-485 Slew Rate Limited Data Rates The SOIC and SSOP versions of this IC operate with Tx output transitions optimized for a 20Mbps data rate. These fast edges may increase EMI and reflection issues, even though fast transitions aren’t required ...

Page 20

Typical Performance Curves 150 LOW 100 50 0 -50 +25°C +85°C -100 -40°C -150 - OUTPUT VOLTAGE (V) FIGURE 18. RS-485, DRIVER OUTPUT CURRENT vs SHORT CIRCUIT VOLTAGE 10m NO ...

Page 21

Typical Performance Curves 1700 R = 54Ω 100pF DIFF L 1650 1600 t DHL 1550 t DLH 1500 1450 1400 -40 0 -25 25 TEMPERATURE (°C) FIGURE 22. RS-485, DRIVER PROPAGATION DELAY vs TEMPERATURE (SLOW DATA RATE, QFN ...

Page 22

Typical Performance Curves R DIFF TIME (400ns/DIV) FIGURE 28. RS-485, DRIVER AND RECEIVER WAVEFORMS, LOW TO HIGH (SLOW DATA RATE, QFN ONLY) R DIFF D Y ...

Page 23

Typical Performance Curves 7 5.0 OUT 2.5 ALL T LOADED WITH 3kΩ TO GND OUTS 0 1 TRANSMITTER/PORT AT 250kbps or 500kbps, OTHER TRANSMITTERS AT 30kbps -2.5 -5 OUT -7.5 0 1000 2000 3000 LOAD CAPACITANCE ...

Page 24

Typical Performance Curves 1100 1000 ALL T LOADED WITH 5kΩ TO GND OUTS 900 800 700 2 TRANSMITTERS AT +25°C 600 1 TRANSMITTER AT +25°C 500 400 300 1 TRANSMITTER AT +85°C 200 2 TRANSMITTERS AT +85°C 100 100 1000 ...

Page 25

Die Characteristics SUBSTRATE AND QFN THERMAL PAD POTENTIAL (POWERED UP): GND TRANSISTOR COUNT: 4838 PROCESS: BiCMOS 25 ISL81334, ISL41334 FN6202.3 November 21, 2007 ...

Page 26

Package Outline Drawing L40.6x6 40 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 3, 10/06 6.00 6 PIN 1 INDEX AREA (4X) 0.15 TOP VIEW ( TYP ) ( TYPICAL RECOMMENDED LAND PATTERN 26 ...

Page 27

Small Outline Plastic Packages (SOIC) N INDEX 0.25(0.010) H AREA E - SEATING PLANE - -C- α 0.10(0.004) 0.25(0.010 NOTES: 1. Symbols are defined in the ...

Page 28

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use ...

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