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ISL4221EIRZ-T Folha de dados(PDF) 1 Page - Intersil Corporation

Nome de Peças ISL4221EIRZ-T
Descrição Electrónicos  QFN Packaged, /-15kV ESD Protected, 2.7V to 5.5V, 150Nanoamp, 250kBps, RS-232 Transmitters/Receivers
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Fabricante Electrônico  INTERSIL [Intersil Corporation]
Página de início  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

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1
®
FN6045.1
ISL4221E, ISL4223E
QFN Packaged, +/-15kV ESD Protected,
+2.7V to +5.5V, 150Nanoamp, 250kBps,
RS-232 Transmitters/Receivers
The Intersil ISL422XE 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 hand-held products where the low
operational, and even lower standby, power consumption is
critical. Efficient on-chip charge pumps, coupled with manual
and automatic powerdown functions, reduce the standby
supply current to a 150nA trickle. Tiny 5mm x 5mm 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 ISL4221E is a 1 driver, 1 receiver device and the
ISL4223E is a 2 driver, 2 receiver device that, coupled with
the 5x5 QFN package, provide the industry’s smallest,
lowest power serial port suitable for PDAs, and hand-held
applications. The 5x5 QFN requires 40% less board area
than a 20 lead TSSOP, and is nearly 20% thinner.
The ISL422XE features an automatic powerdown 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 the ISL422XE, while
Application Note AN9863 summarizes the features of each
device comprising the 3V RS-232 family.
Features
• Available in Near Chip Scale QFN (5mmx5mm) Package
which is 40% Smaller than a 20 Lead TSSOP
• 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 VCC = 2.7V
• On-Chip Voltage Converters Require Only Four External
0.1
µF Capacitors
• Manual and Automatic Powerdown 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 Powerdown State . . . . . . . . . 150nA
• Pb-free Available as an Option
Applications
• Any Space Constrained System Requiring RS-232 Ports
- Battery Powered, and Portable Equipment
- Hand-Held Products (GPS Receivers, Bar Code
Scanners, etc.)
- PDAs and Palmtops, Data Cables
- Cellular/Mobile Phones, Digital Cameras
Related Literature
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
• ”Technical Brief TB379 “Thermal Characterization of
Packages for ICs”
• Technical Brief TB389 “PCB Land Pattern Design and
Surface Mount Guidelines for QFN Packages”
TABLE 1. SUMMARY OF FEATURES
PART
NUMBER
NO. OF
Tx.
NO. OF
Rx.
QFN PKG.
AVAILABLE?
DATA RATE
(kBps)
Rx. ENABLE
FUNCTION?
MANUAL
POWERDOWN?
AUTOMATIC POWERDOWN
FUNCTION?
ISL4221E
1
1
YES
250
YES
YES
YES
ISL4223E
2
2
YES
250
YES
YES
YES
Data Sheet
August 2004
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2004. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.


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