isl3330 Intersil Corporation, isl3330 Datasheet

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isl3330

Manufacturer Part Number
isl3330
Description
3.3v, ?15kv Esd Protected, Dual Protocol Rs-232/rs-485 Transceivers
Manufacturer
Intersil Corporation
Datasheet

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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

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isl3330 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 L ACTIVE ...

Page 2

... Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. Pinouts ISL3330, ISL3331 PART MARKING TEMP. RANGE (°C) -40 to +85 -40 to +85 -40 to +85 -40 to +85 ISL3330 (20 LD SSOP) TOP VIEW C1+ ...

Page 3

... Open Open ISL3330, ISL3331 TABLE 2. ISL3330 FUNCTION TABLE RECEIVER OUTPUTS DRIVER OUTPUTS High-Z High-Z High-Z High-Z High-Z High High-Z High High-Z High-Z ...

Page 4

... RS-232 RECEIVING MODE INPUTS ( 485/232 RXEN and/or RXEN Open 0 1 and ISL3330, ISL3331 TABLE 3. ISL3331 FUNCTION TABLE RECEIVER OUTPUTS SLEW SPB N/A N/A High-Z High-Z High-Z N/A N/A High-Z High-Z ON N/A N/A ON ...

Page 5

... RS-232 External capacitor (voltage inverter) is connected to this lead. Not needed in RS-485 Mode. V+ RS-232 Internally generated positive RS-232 transmitter supply (+5.5V). C3 not needed in RS-485 Mode. V- RS-232 Internally generated negative RS-232 transmitter supply (-5.5V). C4 not needed in RS-485 Mode. 5 ISL3330, ISL3331 FUNCTION supply for the high voltage level. (QFN only forces output Y high ...

Page 6

... C 2 C2+ + 0.1µ RXEN DEN 8 V 485/232 CC GND 10 NOTE: PINOUT FOR SSOP RS-485 MODE WITHOUT LOOPBACK 6 ISL3330, ISL3331 0.1µ 0.1µ RXEN ...

Page 7

... IH1 V IH2 V IH3 V IH4 V IH5 7 ISL3330, ISL3331 Thermal Information = +25°C) Thermal Resistance (Typical 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 ...

Page 8

... POWER SUPPLY CHARACTERISTICS No-Load Supply Current (Note 10) I CC232 I CC485 Shutdown Supply Current I SHDN232 I SHDN485 ESD CHARACTERISTICS Bus Pins ( Any Mode All Other Pins 8 ISL3330, ISL3331 = 3.15V to 3.45V 3.3V +25°C (Note 9) (Continued TEST CONDITIONS QFN L CC ≥ ...

Page 9

... RS-485 DRIVER SWITCHING CHARACTERISTICS (MEDIUM DATA RATE (460kbps), 485/232 = V VERSIONS) Driver Differential Input to Output DLH Delay Driver Output Skew t SKEW Driver Differential Rise or Fall Time ISL3330, ISL3331 = 3.15V to 3.45V 0.1µ 3.3V +25°C (Note 9) (Continued TEST CONDITIONS ≥ 15pF R = 3kΩ, Measured From 3V ...

Page 10

... The Slew pin has a pull-up resistor that enables only when in RS-485 mode (485/232 = V 14. ON, RXEN, and DEN all simultaneously switched Low-to-High. 15. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization and are not production tested. 10 ISL3330, ISL3331 = 3.15V to 3.45V 0.1µ ...

Page 11

... Y/Z 0 ZH(SHDN) t Y/Z 0 ZL(SHDN) FIGURE 3A. TEST CIRCUIT FIGURE 3. RS-485 DRIVER ENABLE AND DISABLE TIMES 11 ISL3330, ISL3331 DEN FIGURE 1. RS-485 DRIVER V AND 100pF L OUT (Z) DIFF C = 100pF L OUT (Y) DIFF OUT ( SKEW = |t 500Ω ...

Page 12

... FIGURE 5. RS-485 RECEIVER ENABLE AND DISABLE TIMES DEN Y SIGNAL GENERATOR FIGURE 6A. TEST CIRCUIT RXEN SIGNAL GENERATOR FIGURE 7A. TEST CIRCUIT 12 ISL3330, ISL3331 (Continued) 15pF B R FIGURE 4. RS-485 RECEIVER PROPAGATION DELAY 1kΩ RXEN GND SW 15pF B (V) SW +1.5 GND -1 +1.5 GND -1 ...

Page 13

... GND 13 ISL3330, ISL3331 RS-422 networks use a two bus, full duplex structure for bidirectional communication, and the Rx inputs and Tx outputs (no tri-state required) connect to different busses, as shown in Figure 9. The Tx and Rx enables aren’t required, so connect RXEN and DEN to V Conversely, RS-485 is a true multipoint standard, which allows devices (any combination of drivers that must be tri-statable and receivers) on each bus ...

Page 14

... See the “RS-485 Mode” on page 14 for more details. Drivers disable via the active high 14 ISL3330, ISL3331 DEN pin, in SHDN (see Tables 2 and 3, and the “Low Power Shutdown (SHDN) Mode” on page 16), or when the 3.3V power supply is off. Because RS-232 is a point-to-point (only ...

Page 15

... Drivers are also tri-stated when the SHDN, or when the 3.3V power supply is off. SPEED OPTIONS The ISL3330 (SSOP) features two speed options that are user selectable via the SLEW pin: a high slew rate setting optimized for 20Mbps data rates (Fast), and a slew rate limited option for operation up to 460kbps (Med) ...

Page 16

... Tx and Rx are disabled (DEN = 0, RXEN = 0, and RXEN = 1) and the already low supply current drops to as low as 10µA. SHDN disables the Tx and Rx outputs, and 16 ISL3330, ISL3331 disables the charge pumps if the port is in RS-232 mode collapses and V- collapses to GND. ...

Page 17

... Table 5 indicates typical various V voltages so the user can ascertain whether or not L a particular V voltage meets his needs ISL3330, ISL3331 . Note: With V data rate unless the logic signal (see OH L the typical value listed in Table 5. The V shown in Figures 19 and 20. All of the inputs with internal pull-up resistors (SPB, SLEW, RXEN) being driven to the low input state ...

Page 18

... QFN ONLY ACTIVE LOW RX ENABLE FIGURE 12. USING ACTIVE LOW vs ACTIVE HIGH RX ENABLE 18 ISL3330, ISL3331 Evaluation Board An evaluation board, part number ISL3331EVAL1Z, is available to assist in assessing the dual protocol IC’s performance. The evaluation board contains a QFN packaged device, but because the same die is used in all packages, the board is also useful for evaluating the functionality of the other versions. The board’ ...

Page 19

... LOW 0 +25°C -50 +85°C -100 -40°C -150 - OUTPUT VOLTAGE (V) FIGURE 17. RS-485, DRIVER OUTPUT CURRENT vs SHORT CIRCUIT VOLTAGE 19 ISL3330, ISL3331 3.3V +25°C; Unless Otherwise Specified +25° +85°C OL 2.0 3.0 3.3 FIGURE 14. RECEIVER HIGH OUTPUT VOLTAGE vs LOGIC 2.5 3 ...

Page 20

... DIFF L 545 540 535 530 525 t DHL 520 515 -40 - TEMPERATURE (°C) FIGURE 23. RS-485, DRIVER PROPAGATION DELAY vs TEMPERATURE (MEDIUM DATA RATE) 20 ISL3330, ISL3331 3.3V +25°C; Unless Otherwise Specified (Continued ≤ V > ...

Page 21

... DIFF TIME (200ns/DIV) FIGURE 29. RS-485, DRIVER AND RECEIVER WAVEFORMS, LOW TO HIGH (MEDIUM DATA RATE) 21 ISL3330, ISL3331 3.3V +25°C; Unless Otherwise Specified (Continued DHL FIGURE 26. RS-485, DRIVER SKEW vs TEMPERATURE = 54Ω 100pF ...

Page 22

... V SHORTED TO GND OUT HIGH -20 -30 -40 - TEMPERATURE (°C) FIGURE 35. RS-232, TRANSMITTER SHORT CIRCUIT CURRENT vs TEMPERATURE 22 ISL3330, ISL3331 3.3V +25°C; Unless Otherwise Specified (Continued 54Ω 100pF FIGURE 32. RS-485, DRIVER AND RECEIVER WAVEFORMS, ...

Page 23

... LOADED WITH 3kΩ TO GND, C 600 OUTS 550 500 450 400 350 300 250 0 50 200 400 DATA RATE (kbps) FIGURE 41. RS-232, TRANSMITTER SKEW vs DATA RATE 23 ISL3330, ISL3331 3.3V +25°C; Unless Otherwise Specified (Continued FULL TEMP RANGE ...

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 ISL3330, ISL3331 4X 4.5 36X 0. 40X ± BOTTOM VIEW ± SIDE VIEW ( 36X ...

Page 25

... 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. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 25 ISL3330, ISL3331 M20.209 20 LEAD SHRINK SMALL OUTLINE PLASTIC PACKAGE M ...

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