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Intersil Electronic Components Datasheet

SL4224E Datasheet

(SLxxxxE) RS-232 Transmitters/Receivers

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®
Data Sheet
ISL3232E, ISL4221E, ISL4223E
September 13, 2007
FN6045.3
QFN Packaged, ±15kV ESD Protected,
+2.7V to +5.5V, 150nA, 250kbps, RS-232
Transmitters/Receivers
The Intersil ISL3232E and ISL4221E, ISL4223E 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 power-down functions,
reduce the standby supply current to a 150nA 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 ISL4221E is a 1 driver, 1 receiver device and the
ISL3232E and ISL4223E are 2 driver, 2 receiver devices
that, coupled with the 5mmx5mm QFN package, provide the
industry’s smallest, lowest power serial port suitable for
PDAs, and hand-held applications. The 5mmx5mm QFN
requires 40% less board area than a 20 Ld TSSOP, and is
nearly 20% thinner.
The ISL4221E, ISL4223E versions feature 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 the IC’s, 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 Ld 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
0.1µF Capacitors
• Manual and Automatic Power-down Features (Except
ISL3232E)
• 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 . . . . . . . .150nA
• Pb-Free Available (RoHS Compliant)
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
NO. OF NO. OF QFN PKG.
PART NUMBER Tx.
Rx. AVAILABLE?
DATA RATE
(kbps)
Rx. ENABLE
MANUAL
FUNCTION? POWER-DOWN?
ISL4221E
11
YES
250
YES
YES
ISL3232E
22
YES
250
NO
NO
ISL4223E
22
YES
250
YES
YES
AUTOMATIC POWER-DOWN
FUNCTION?
YES
NO
YES
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) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2004, 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.


Intersil Electronic Components Datasheet

SL4224E Datasheet

(SLxxxxE) RS-232 Transmitters/Receivers

No Preview Available !

www.DataSheet4U.com
ISL3232E, ISL4221E, ISL4223E
Ordering Information
PART
NUMBER
PART
MARKING
TEMP.
RANGE (°C)
PACKAGE
PKG.
DWG. #
ISL3232EIRZ* (Note)
ISL3232 EIRZ
-40 to +85
16 Ld QFN (Pb-free)
L16.5x5B
ISL4221EIR*
ISL 4221EIR
-40 to +85
16 Ld QFN
L16.5x5B
ISL4221EIRZ* (Note)
ISL4221 EIRZ
-40 to +85
16 Ld QFN (Pb-free)
L16.5x5B
ISL4223EIR*
ISL 4223EIR
-40 to +85
20 Ld QFN
L20.5x5
ISL4223EIRZ* (Note)
ISL4223 EIRZ
-40 to +85
20 Ld QFN (Pb-free)
L20.5x5
*Add “-T” suffix for tape and reel. 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.
Pinouts
ISL3232E
(16 LD QFN)
TOP VIEW
ISL4221E
(16 LD QFN)
TOP VIEW
C1- 1
C2+ 2
C2- 3
V- 4
16 15 14 13
56 78
12 T1OUT
11 R1IN
10 R1OUT
9 T1IN
V+ 1
C1- 2
C2+ 3
C2- 4
16 15 14 13
56 78
12 GND
11 T1OUT
10 FORCEON
9 T1IN
ISL4223E
(20 LD QFN)
TOP VIEW
20 19 18 17 16
V+ 1
C1- 2
C2+ 3
C2- 4
V- 5
15 T1OUT
14 R1IN
13 R1OUT
12 FORCEON
11 T1IN
6 7 8 9 10
2 FN6045.3
September 13, 2007


Part Number SL4224E
Description (SLxxxxE) RS-232 Transmitters/Receivers
Maker Intersil Corporation
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