ISL4260E
®
Data Sheet
August 2004
FN6035.1
QFN Packaged, ±15kV ESD Protected, +3V
to +5.5V, 150nA, 250kbps, RS-232
Transmitters/Receivers with Separate
Logic Supply
Features
• Available in Near Chip Scale QFN (5mmx5mm) Package
• V Pin for Compatibility with Mixed Voltage Systems
L
• 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
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
= 3.0V. Targeted
CC
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.
• 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 available
The ISL4260E features a V pin that adjusts the logic pin
L
(see Pin Descriptions table) output levels and input
thresholds to values compatible with the V
external logic (e.g., a UART).
powering the
CC
Applications
• Any System Requiring RS-232 Communication Ports
- Battery Powered, Hand-Held, and Portable Equipment
- Laptop Computers, Notebooks, Palmtops
- Digital Cameras
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.
- PDAs and PDA Cradles
- Cellular/Mobile Phones
Ordering Information
PART
NUMBER
TEMP.
RANGE ( C)
o
PACKAGE
PKG. NO.
L32.5x5
L32.5x5
ISL4260EIR
-40 to 85
32 Lead QFN
ISL4260EIRZ
(See Note)
-40 to 85
32 Lead QFN
(Pb-free)
*Add “-T” suffix to part number for tape and reel packaging.
NOTE: Intersil Pb-free products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which is 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-020B.
TABLE 1. SUMMARY OF FEATURES
NO. OF NO.OF DATARATE Rx. ENABLE LOGIC
PART
V
MANUAL
AUTOMATIC
L
NUMBER
Tx.
Rx.
(kbps)
FUNCTION?
SUPPLY PIN?
POWER- DOWN? POWERDOWN FUNCTION?
ISL4260E
3
2
250
NO
YES
YES
NO
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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