ISL41387IRZ Intersil, ISL41387IRZ Datasheet

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ISL41387IRZ

Manufacturer Part Number
ISL41387IRZ
Description
IC TXRX DUAL PROTOCAL ESD 40-QFN
Manufacturer
Intersil
Type
Transceiverr
Datasheet

Specifications of ISL41387IRZ

Number Of Drivers/receivers
2/2
Protocol
RS422, RS485
Voltage - Supply
4.5 V ~ 5.5 V
Mounting Type
Surface Mount
Package / Case
40-VFQFN, 40-VFQFPN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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Part Number:
ISL41387IRZ
Manufacturer:
Intersil
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8 000
±
(RS-232/RS-485) Transceivers
These devices are BiCMOS interface ICs that are user
configured as either a single RS-422, RS-485 differential
transceiver, or as a dual (2 Tx, 2 Rx) RS-232 transceiver.
In RS-232 mode, the on-board charge pump generates
RS-232 compliant ±5V Tx output levels, from a supply as low
as 4.5V. Four small 0.1µF 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
RS-485 receiver features "full failsafe" operation, so the Rx
output remains in a high state if the inputs are open or
shorted together. The RS-485 transmitter supports up to
three data rates, two of which are slew rate limited for
problem free communications. The charge pump disables in
RS-485 mode, thereby saving power, minimizing noise, and
eliminating the charge pump capacitors.
Both RS-232, RS-485 modes feature loopback and
shutdown functions. The loopback mode internally connects
the Tx outputs to the corresponding Rx input, which
facilitates the implementation of board level self test
functions. The outputs remain connected to the loads during
loopback, so connection problems (e.g., shorted connectors
or cables) can be detected. The shutdown mode disables
the Tx and Rx outputs, disables the charge pump if in
RS-232 mode, and places the IC in a low current (20µA)
mode.
The ISL41387 is a QFN packaged device that offers
additional functionality, including a lower speed and edge
rate option (115kbps) for EMI sensitive designs, or to allow
longer bus lengths. It also features a logic supply voltage pin
(V
switching points of logic inputs, to be compatible with
another supply voltage in mixed voltage systems. The QFN's
choice of active high or low Rx enable pins increases design
flexibility, allowing Tx/Rx direction control via a single signal
by connecting DEN and RXEN together.
For a dual port version of these devices, please see the
ISL81334, ISL41334 data sheet.
ISL81387
ISL41387
15kV ESD Protected, 5V, Dual Protocol
NUMBER
L
) that sets the V
PART
NO. OF
PORTS
1
1
OH
level of logic outputs, and the
20 Ld SOIC, 20 Ld SSOP
40 Ld QFN (6mmx6mm)
PACKAGE OPTIONS
®
1
Data Sheet
TABLE 1. SUMMARY OF FEATURES
20M, 460k, 115k
RS-485 DATA
RATE (bps)
20M, 460k
1-888-INTERSIL or 1-888-468-3774
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
RS-232 DATA
RATE (kbps)
Features
• 5V Powered, User Selectable RS-232 or RS-485, RS-422
• ±15kV (HBM) ESD Protected Bus Pins (RS-232 or
• 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 . . . . . . . . . . 20Mbps
• Fast RS-232 Data Rate . . . . . . . . . . . . . . . Up to 650kbps
• Low Current Shutdown Mode. . . . . . . . . . . . . . . . . . .35µA
• QFN Package Saves Board Space (ISL41387 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
November 21, 2007
Interface Port (Two RS-232 Transceivers or One RS-485,
RS-422 Transceiver)
RS-485)
Immunity in RS-485, RS-422 Networks
- Slew Rate Limited. . . . . . . . . . . . . . . . . . . . . . . 460kbps
- Slew Rate Limited (ISL41387 Only) . . . . . . . . . 115kbps
Systems (ISL41387 Only)
650
650
All other trademarks mentioned are the property of their respective owners.
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2005, 2007. All Rights Reserved.
V
L
YES
NO
PIN?
ISL81387, ISL41387
L
) Eases Operation in Mixed Supply
OUT
ACTIVE H or L
Rx ENABLE?
BOTH
for Improved Noise
H
SHUTDOWN?
LOW POWER
FN6201.3
YES
YES

Related parts for ISL41387IRZ

ISL41387IRZ 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. Copyright © Intersil Americas Inc. 2005, 2007. All Rights Reserved. All other trademarks mentioned are the property of their respective owners. ...

Page 2

... ISL81387IBZ-T* ISL81387IBZ ISL41387IRZ 41387 IRZ ISL41387IRZ-T* 41387 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 485/232 ON RXEN DEN SLEW ...

Page 4

INPUTS RXEN and/or 485/232 ON DEN RXEN and and and ...

Page 5

Pin Descriptions PIN MODE 485/232 BOTH Interface Mode Select input. High for RS-485 Mode and low for RS-232 Mode. DEN BOTH Driver output enable. The driver outputs, Y and Z, are enabled by bringing DEN high. They are high impedance ...

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 6 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 Input Current CHARACTERISTICS - RS-485 RECEIVER INPUTS (485/232 = V Receiver Differential Threshold V Voltage ΔV Receiver Input Hysteresis Receiver ...

Page 9

Electrical Specifications Test Conditions: V Typicals are at V PARAMETER SYMBOL Driver Output Transition Time t Driver Propagation Delay t DPHL t DPLH Driver Propagation Delay Skew t DSKEW Driver Enable Time t DEN Driver Disable Time t DDIS Driver ...

Page 10

Electrical Specifications Test Conditions: V Typicals are at V PARAMETER SYMBOL RS-485 DRIVER SWITCHING CHARACTERISTICS (SLOW DATA RATE (115kbps, QFN ONLY), 485/232 = V Driver Differential Input to Output t DLH Delay Driver Output Skew t SKEW Driver Differential Rise ...

Page 11

Test Circuits and Waveforms V CC DEN SIGNAL GENERATOR FIGURE 2A. TEST CIRCUIT FIGURE 2. RS-485 DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES DEN SIGNAL Z GENERATOR C L ...

Page 12

Test Circuits and Waveforms RXEN SIGNAL GENERATOR FIGURE 4A. TEST CIRCUIT RXEN SIGNAL B GENERATOR FOR SHDN TESTS, SWITCH ON AND RXEN L- H SIMULTANEOUSLY PARAMETER DEN t ...

Page 13

Detailed Description The ISL81387, ISL41387 port supports dual protocols: RS-485, RS-422, and RS-232. RS-485 and RS-422 are differential (balanced) data transmission standards for use in high speed (up to 20Mbps) networks, or long haul and noisy environments. The differential signalling, ...

Page 14

ISL81387, ISL41387 Advantages These dual protocol ICs offer many parametric improvements versus those offered on competing dual protocol devices. Some of the major improvements are: • 15kV Bus Pin ESD - Eases board level requirements • 2.7V Diff V - ...

Page 15

Worst case receiver input currents are 20% lower than the 1 “unit load” (1mA) RS-485 limit, which translates to a 15kΩ minimum input resistance. These receivers include a “full fail-safe” function that guarantees a high level receiver output if the ...

Page 16

Proper termination is imperative to minimize reflections when using the 20Mbps speed option. Short networks using the medium and slow speed options need not be terminated, but terminations are recommended unless power dissipation is an overriding concern. Note that the ...

Page 17

Note that the loopback mode uses an additional set of receivers, as shown in “Typical Operating Circuit” on page 6. These loopback receivers are not standards compliant, so the loopback mode can’t be used to implement a half-duplex RS-485 transceiver. ...

Page 18

EMI and reflections. Nevertheless, for the best jitter performance when driving long cables, the faster speed options may be preferable, even at lower data rates. The faster output transitions deliver less variability (jitter) when loaded with the large capacitance ...

Page 19

Typical Performance Curves 100 DIFFERENTIAL OUTPUT VOLTAGE (V) FIGURE 15. RS-485, DRIVER OUTPUT CURRENT vs DIFFERENTIAL OUTPUT VOLTAGE 150 LOW 100 50 0 ...

Page 20

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 21. RS-485, DRIVER PROPAGATION DELAY vs TEMPERATURE (SLOW DATA RATE, QFN ...

Page 21

Typical Performance Curves R DIFF TIME (400ns/DIV) FIGURE 27. RS-485, DRIVER AND RECEIVER WAVEFORMS, LOW TO HIGH (SLOW DATA RATE, QFN ONLY) R DIFF D Y ...

Page 22

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

Page 23

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 24

Die Characteristics SUBSTRATE AND QFN THERMAL PAD POTENTIAL (POWERED UP): GND TRANSISTOR COUNT: 2490 PROCESS: BiCMOS 24 ISL81387, ISL41387 FN6201.3 November 21, 2007 ...

Page 25

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 25 ...

Page 26

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 27

... 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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