廬
ISL4260E
Data Sheet
August 2004
FN6035.1
QFN Packaged,
鹵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
鈥?Available in Near Chip Scale QFN (5mmx5mm) Package
鈥?V
L
Pin for Compatibility with Mixed Voltage Systems
鈥?ESD Protection for RS-232 I/O Pins to
鹵
15kV (IEC61000)
鈥?Single SHDN Pin Disables Transmitters and Receivers
鈥?Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
鈥?On-Chip Charge Pumps Require Only Four External
0.1碌F Capacitors
鈥?Receiver Hysteresis For Improved Noise Immunity
鈥?Very Low Supply Current . . . . . . . . . . . . . . . . . . . . 300碌A(chǔ)
鈥?Guaranteed Minimum Data Rate . . . . . . . . . . . . . 250kbps
鈥?Wide Power Supply Range. . . . . . . . Single +3V to +5.5V
鈥?Low Supply Current in Powerdown State . . . . . . . . .150nA
鈥?/div>
Pb-free available
Applications
鈥?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
ISL4260EIR
ISL4260EIRZ
(See Note)
TEMP.
RANGE (
o
C)
-40 to 85
-40 to 85
PACKAGE
32 Lead QFN
32 Lead QFN
(Pb-free)
PKG. NO.
L32.5x5
L32.5x5
*Add 鈥?T鈥?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
PART
NUMBER
ISL4260E
NO. OF NO. OF DATA RATE Rx. ENABLE
Tx.
Rx.
(kbps)
FUNCTION?
3
2
250
NO
V
L
LOGIC
SUPPLY PIN?
YES
MANUAL
AUTOMATIC
POWER- DOWN? POWERDOWN FUNCTION?
YES
NO
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
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Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright 漏 Intersil Americas Inc. 2003, 2004. All Rights Reserved
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