ISL4243EIR Intersil, ISL4243EIR Datasheet

IC TXRX RS232 2.7-5.5VESD 32-QFN

ISL4243EIR

Manufacturer Part Number
ISL4243EIR
Description
IC TXRX RS232 2.7-5.5VESD 32-QFN
Manufacturer
Intersil
Type
Transceiverr
Datasheet

Specifications of ISL4243EIR

Number Of Drivers/receivers
3/5
Protocol
RS232
Voltage - Supply
2.7 V ~ 5.5 V
Mounting Type
Surface Mount
Package / Case
32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ISL4243EIR
Quantity:
235
Part Number:
ISL4243EIRZ
Manufacturer:
Intersil
Quantity:
2 364
Part Number:
ISL4243EIRZ
Manufacturer:
INTERSIL
Quantity:
20 000
Company:
Part Number:
ISL4243EIRZ-T
Quantity:
35
QFN Packaged, ±15kV ESD Protected,
+2.7V to +5.5V, 10Nanoamp, 250kbps,
RS-232 Transmitters/Receivers
Intersil’s ISL4241E, ISL4243E devices are 2.7V to 5.5V
powered RS-232 transmitters/receivers which meet
ElA/TIA-232 and V.28/V.24 specifications, even at
VCC = 3.0V. Additionally, they provide ±15kV ESD protection
(IEC61000-4-2 Air Gap and Human Body Model) on
transmitter outputs and receiver inputs (RS-232 pins).
Targeted applications are PDAs, Palmtops, and notebook
and laptop computers where the low operational, and even
lower standby, power consumption is critical. Efficient
on-chip charge pumps, coupled with manual and automatic
power-down functions, reduce the standby supply current to
a 10nA trickle. Tiny 5mmx5mm Quad Flat No-Lead (QFN)
packaging and the use of small, low value capacitors ensure
board space savings as well. Data rates greater than
250kbps are guaranteed at worst case load conditions.
The ISL4241E, ISL4243E’s are 3 driver, 5 receiver devices
that, coupled with the 5x5 QFN package, provide the
industry’s smallest, lowest power complete serial port
suitable for PDAs, and laptop or notebook computers. The
32 Ld 5X5 QFN requires 60% less board area than a 28 Ld
TSSOP, and is nearly 20% thinner. The devices also include
a noninverting always-active receiver for “wake-up”
capability.
The ISL4243E features an automatic power-down function
that powers down the on-chip power-supply and driver
circuits. This occurs when an attached peripheral device is
shut off or the RS-232 cable is removed, conserving system
power automatically without changes to the hardware or
operating system. It powers up again when a valid RS-232
voltage is applied to any receiver input.
Table 1 summarizes the features of both the ISL4241E and
ISL4243E, while Application Note AN9863 summarizes the
features of each device comprising the 3V RS-232 family.
PART NUMBER
ISL4241E
ISL4243E
NO. OF
Tx.
3
3
NO. OF
®
Rx.
5
5
1
AVAILABLE?
QFN PKG.
Data Sheet
YES
YES
TABLE 1. SUMMARY OF FEATURES
MONITOR Rx.
(R
NO. OF
OUTB
1-888-INTERSIL or 1-888-468-3774
2
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
)
(kbps)
DATA
RATE
250
250
Features
• Pb-Free Available (RoHS compliant)
• Parameters Fully Specified for 10% Tolerance Supplies
• Available in Small QFN (5mmx5mm) Package which is
• ESD Protection for RS-232 I/O Pins to ±15kV (IEC61000)
• Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
• RS-232 Compatible with V
• On-Chip Voltage Converters Require Only Four External
• Manual and Automatic Power-down Features
• Receiver Hysteresis For Improved Noise Immunity
• Guaranteed Minimum Data Rate . . . . . . . . . . . . . 250kbps
• Wide Power Supply Range . . . . . . Single +2.7V to +5.5V
• Low Supply Current in Power-down State . . . . . . . . .10nA
Applications
• Any Space Constrained System Requiring RS-232 Ports
Related Literature
• Technical Brief TB363 “Guidelines for Handling and
• ”Technical Brief TB379 “Thermal Characterization of
• Technical Brief TB389 “PCB Land Pattern Design and
and Full Industrial Temp Range
60% Smaller than a 28 Lead TSSOP
0.1µF Capacitors
- Battery Powered, Hand-Held, and Portable Equipment
- Laptop Computers, Notebooks
- PDAs and Palmtops, Data Cables
- Cellular/Mobile Phones, Digital Cameras, GPS
Processing Moisture Sensitive Surface Mount Devices
Packages for ICs”
Surface Mount Guidelines for QFN Packages”
Receivers
Rx. ENABLE
FUNCTION?
All other trademarks mentioned are the property of their respective owners
|
YES
June 10, 2010
Copyright Intersil Americas Inc. 2004, 2008, 2010. All Rights Reserved
NO
Intersil (and design) is a registered trademark of Intersil Americas Inc.
ISL4241E, ISL4243E
OUTPUT?
READY
NO
NO
CC
= 2.7V
MANUAL
POWER-
DOWN?
YES
YES
AUTOMATIC
FUNCTION?
FN8037.7
POWER-
DOWN
YES
NO

Related parts for ISL4243EIR

ISL4243EIR 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. 2004, 2008, 2010. All Rights Reserved All other trademarks mentioned are the property of their respective owners ISL4241E, ISL4243E FN8037 ...

Page 2

... ISL4243EIR-T* ISL 4243EIR ISL4243EIRZ (Note) ISL4243 EIRZ ISL4243EIRZ-T* (Note) ISL4243 EIRZ *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). 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 ...

Page 3

Pin Descriptions PIN V System power supply input (2.7V to 5.5V Internally generated positive transmitter supply (+5.5V). V- Internally generated negative transmitter supply (-5.5V). GND Ground connection. This is also the potential of the thermal pad (PD). C1+ ...

Page 4

Typical Operating Circuits ISL4241E +3.3V + 0.1µ C1 0.1µ C2+ + 0.1µ OUTB 19 R2 ...

Page 5

... ISL4241E, ISL4243E Thermal Information Thermal Resistance (Typical, Notes QFN Package Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C Pb-Free Reflow Profile .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp Operating Conditions Temperature Range ISL4241EIR, ISL4243EIR . . . . . . . . . . . . . . . . . . .-40°C to +85°C +0. 5.5V 0.1µF; Unless Otherwise Specified +25°C ...

Page 6

Electrical Specifications Test Conditions: V Typicals are at T PARAMETER Receiver Positive or Negative Threshold to INVALID High Delay (t ) INVH Receiver Positive or Negative Threshold to INVALID Low Delay (t ) INVL RECEIVER INPUTS Input Voltage Range Input ...

Page 7

... The charge pump, the transmitters, and the receivers. Charge-Pump Intersil’s new ISL4241E, ISL4243E devices utilize regulated on-chip dual charge pumps as voltage doublers, and voltage inverters to generate ±5.5V transmitter supplies from a V supply as low as 3.0V. This allows them to maintain RS-232 compliant output levels over the ± ...

Page 8

TABLE 2. POWER-DOWN AND ENABLE LOGIC TRUTH TABLE RS-232 SIGNAL PRESENT AT SHDN OR RECEIVER FORCEOFF FORCEON INPUT? INPUT INPUT ISL4241E N.A. L N/A N.A. L N/A N.A. H N/A N.A. H N/A ISL4243E YES H L ...

Page 9

V CC TRANSITION DETECTOR TO WAKE-UP LOGIC OUTB HI-Z X OUT R2 POWERED OUT DOWN UART FORCEOFF = GND OR SHDN = GND FIGURE 3. DISABLED ...

Page 10

Reconnecting the cable restores valid levels at the receiver inputs, INVALID switches high, and the power management logic wakes up the interface block. INVALID can also be used to indicate ...

Page 11

FORCEOFF 2V/DIV +3. 0.1µF TIME (20µs/DIV) FIGURE 8. TRANSMITTER OUTPUTS WHEN EXITING POWER-DOWN Operation Down to 2.7V The ISL4241E, ISL4243E transmitter outputs meet RS-562 levels (±3.7V), at the full data rate, with ...

Page 12

TABLE 3. LOGIC FAMILY COMPATIBILITY WITH VARIOUS SUPPLY VOLTAGES (Continued) SYSTEM V CC POWER-SUPPLY SUPPLY VOLTAGE VOLTAGE (V) (V) COMPATIBILITY 5 3.3 Compatible with ACT and HCT CMOS, and with TTL. ISL4241E, ISL4243E outputs are incompatible with AC, HC, and ...

Page 13

... 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 ...

Page 14

Package Outline Drawing L32.5x5B 32 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 2, 11/07 5.00 6 PIN 1 INDEX AREA (4X) 0.15 TOP VIEW ( 4. 80 TYP ) ( TYPICAL RECOMMENDED LAND PATTERN 14 ISL4241E, ISL4243E ...

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