ISL3330IAZ Intersil, ISL3330IAZ Datasheet

IC TXRX 3.3V RS232/485 20-SSOP

ISL3330IAZ

Manufacturer Part Number
ISL3330IAZ
Description
IC TXRX 3.3V RS232/485 20-SSOP
Manufacturer
Intersil
Type
Transceiverr
Datasheet

Specifications of ISL3330IAZ

Number Of Drivers/receivers
2/2
Protocol
RS232, RS485
Voltage - Supply
3.15 V ~ 3.45 V
Mounting Type
Surface Mount
Package / Case
20-SSOP
Package
20SSOP
Data Transmission Topology
Point-to-Point|Multipoint
Data Rate
20 Mbps
Function
Line Transmitter/Receiver
Number Of Transmitters
2
Transmitter Signal Type
Single-Ended|Differential
Transmitter Communication Type
RS-232|RS-485
Driving Mode
3-State
Typical Single Supply Voltage
3.3 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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3.3V, ±15kV ESD Protected, Dual Protocol
(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 3.15V. 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.
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, where
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 (30µA) mode.
The ISL3331 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
ISL3332/ISL3333 data sheet.
ISL3330
ISL3331
NUMBER
L
) that sets the V
PART
NO. OF
PORTS
1
1
OH
level of logic outputs, and the
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
• User Selectable RS-232 or RS-485/RS-422 Interface Port
• Operates From a Single 3.3V Supply
• ±15kV (HBM) ESD Protected Bus Pins (RS-232 or
• 5V Tolerant Logic Inputs
• True Flow-Through Pinouts Simplify Board Layouts
• Pb-Free (RoHS Compliant)
• 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 400kbps
• Low Current Shutdown Mode. . . . . . . . . . . . . . . . . . 30µA
• QFN Package Saves Board Space (ISL3331 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
Related Literature
• Application Note AN1401 “Implementing a Three Pin,
(Two RS-232 Transceivers or One RS-485/RS-422
Transceiver)
RS-485)
- Slew Rate Limited. . . . . . . . . . . . . . . . . . . . . . . 460kbps
- Slew Rate Limited (ISL3331 Only) . . . . . . . . . . 115kbps
Systems (ISL3331 Only)
Half-Duplex, Dual Protocol Interface”
400
400
All other trademarks mentioned are the property of their respective owners.
May 20, 2008
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
V
Copyright © Intersil Americas Inc. 2008. All Rights Reserved.
L
Yes
No
PIN?
L
) Eases Operation in Mixed Supply
ISL3330, ISL3331
ACTIVE H or L
Rx ENABLE?
Both
H
SHUTDOWN?
LOW POWER
FN6361.0
Yes
Yes

Related parts for ISL3330IAZ

ISL3330IAZ 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. ISL3330, ISL3331 FN6361.0 ) Eases Operation in Mixed Supply ...

Page 2

... Ordering Information PART NUMBER (NOTE) ISL3330IAZ 3330 IAZ ISL3330IAZ-T* 3330 IAZ ISL3331IRZ ISL3331IRZ ISL3331IRZ-T* ISL3331IRZ *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 Circuits +3.3V + 0.1µ C1 0.1µ C2+ + 0.1µ 5kΩ 5kΩ ...

Page 7

... Ld SSOP Package (Note QFN Package (Notes 7, 8 Maximum Junction Temperature (Plastic Package +150°C Maximum Storage Temperature Range . . . . . . . . . -65°C to +150°C Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp + 0.5V 0.5V) L Operating Conditions Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C = 3.15V to 3.45V, C ...

Page 8

Electrical Specifications Test Conditions: V Typicals are at V PARAMETER SYMBOL Input Low Voltage V IL1 V IL2 V IL3 V IL4 V IL5 V IL6 Input Current I IN1 I IN2 DC CHARACTERISTICS - RS-485 RECEIVER INPUTS (485/232 = ...

Page 9

Electrical Specifications Test Conditions: V Typicals are at V PARAMETER SYMBOL RS-232 DRIVER and RECEIVER SWITCHING CHARACTERISTICS (485/232 = 0V, ALL VERSIONS AND SPEEDS) Driver Output Transition Region SR Slew Rate Driver Output Transition Time Driver ...

Page 10

Electrical Specifications Test Conditions: V Typicals are at V PARAMETER SYMBOL Driver Enable to Output Low t ZL Driver Enable to Output High t ZH Driver Disable from Output Low t LZ Driver Disable from Output High t HZ Driver ...

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 ISL333x 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, coupled with ...

Page 14

ISL333x Advantages These dual protocol ICs offer many parametric improvements vs those offered on competing dual protocol devices. Some of the major improvements are: • 3.3V Supply Voltage - Eliminates the 5V supply that powers just the interface IC • ...

Page 15

Each RS-485/422 port includes a single receiver (RA), and the unused Rx output (RB) is disabled. 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. ...

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

ISL3331 (QFN Package) Special Features Logic Supply (V Pin) L The ISL3331 (QFN) includes a V pin that powers the logic L inputs (Tx inputs and control pins) and Rx outputs. These pins interface with “logic” devices such as UARTs, ...

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 ...

Page 19

Typical Performance Curves +25° +85° 0.0 1.0 RECEIVER OUTPUT VOLTAGE (V) FIGURE 13. RECEIVER OUTPUT CURRENT vs RECEIVER OUTPUT VOLTAGE ...

Page 20

Typical Performance Curves 50 NO LOAD GND DEN, RXEN GND RS-485, SLEW, SPB, RXEN = GND 25 20 RS-232, RXEN = GND, SPB = ...

Page 21

Typical Performance Curves 54Ω 100pF DIFF DLH -40 - TEMPERATURE (°C) FIGURE 25. RS-485, DRIVER PROPAGATION DELAY vs TEMPERATURE (FAST DATA RATE) ...

Page 22

Typical Performance Curves R DIFF TIME (10ns/DIV) FIGURE 31. RS-485, DRIVER AND RECEIVER WAVEFORMS, LOW TO HIGH (FAST DATA RATE) 7 5.0 OUT 2.5 ALL T ...

Page 23

Typical Performance Curves C = 1000pF, 1 CHANNEL SWITCHING Y 2µs/DIV FIGURE 37. RS-232, TRANSMITTER AND RECEIVER WAVEFORMS AT 400kbps 550 ≥ ±4V AND DUTY CYCLE BETWEEN 40% AND 60% ...

Page 24

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 24 ...

Page 25

... 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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