1
®
FN6035.2
ISL4260E
QFN Packaged, ±15kV ESD Protected, +3V
to +5.5V, 150nA, 250kbps, RS-232
Transmitters/Receivers with Separate
Logic Supply
The ISL4260E contains 3.0V to 5.5V powered RS-232
transmitters/receivers which meet ElA/TIA-232 and
V.28/V.24 specifications, even at V
CC
= 3.0V. Targeted
applications are PDAs, Palmtops, and cell phones where the
low operational, and even lower standby, power
consumption is critical. Efficient on-chip charge pumps,
coupled with a manual powerdown function reduces 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 ISL4260E features a V
L
pin that adjusts the logic pin
(see Pin Descriptions table) output levels and input
thresholds to values compatible with the V
CC
powering the
external logic (e.g., a UART).
The single pin powerdown function (SHDN
= 0) disables all
the receiver and transmitter outputs, while shutting down the
charge pump to minimize supply current drain.
Table 1 summarizes the features of the ISL4260E, 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
•V
L
Pin for Compatibility with Mixed Voltage Systems
• ESD Protection for RS-232 I/O Pins to
±15kV (IEC61000)
• Single SHDN
Pin Disables Transmitters and Receivers
• Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
• On-Chip Charge Pumps Require Only Four External
0.1μF Capacitors
• Receiver Hysteresis For Improved Noise Immunity
• Very Low Supply Current . . . . . . . . . . . . . . . . . . . . 300μA
• Guaranteed Minimum Data Rate . . . . . . . . . . . . . 250kbps
• Wide Power Supply Range . . . . . . . Single +3V to +5.5V
• Low Supply Current in Powerdown State. . . . . . . . .150nA
• Pb-Free (RoHS Compliant)
Applications
• Any System Requiring RS-232 Communication Ports
- Battery Powered, Hand-Held, and Portable Equipment
- Laptop Computers, Notebooks, Palmtops
- Digital Cameras
- PDAs and PDA Cradles
- Cellular/Mobile Phones
Ordering Information
PART
NUMBER
PART
MARKING
TEMP.
RANGE
(
o
C) PACKAGE
PKG.
DWG. #.
ISL4260EIRZ*
(Note)
ISL4260 EIRZ -40 to +85 32 Lead QFN
(Pb-free)
L32.5x5B
*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.
TABLE 1. SUMMARY OF FEATURES
PART
NUMBER
NO. OF
Tx.
NO. OF
Rx.
DATA RATE
(kbps)
Rx. ENABLE
FUNCTION?
V
L
LOGIC
SUPPLY PIN?
MANUAL
POWER- DOWN?
AUTOMATIC
POWERDOWN FUNCTION?
ISL4260E 3 2 250 NO YES YES NO
Data Sheet June 21, 2010
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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