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3-1
TM
File Number
4805.2
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 trademark of Intersil Corporation.
Copyright
Intersil Corporation 2000
ICL3221 thru ICL3243
1 Microamp Supply-Current, +3V to +5.5V,
250kbps, RS-232 Transmitters/Receivers
The Intersil ICL32XX devices are 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 notebook and laptop
computers where the low operational, and even lower
standby, power consumption is critical. Efficient on-chip
charge pumps, coupled with manual and automatic
powerdown functions (except for the ICL3232), reduce the
standby supply current to a 1
μ
A trickle. Small footprint
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. This
family is fully compatible with 3.3V only systems, mixed 3.3V
and 5.0V systems, and 5.0V only systems.
The ICL324X are 3 driver, 5 receiver devices that provide a
complete serial port suitable for laptop or notebook
computers. Both devices also include noninverting always-
active receivers for “wake-up” capability.
The
ICL3221, ICL3223 and ICL3243,
feature an
automatic
powerdown
function which 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. These devices power up
again when a valid RS-232 voltage is applied to any receiver
input.
Table 1 summarizes the features of the devices represented
by this data sheet, while Application Note AN9863
summarizes the features of each device comprising the
ICL32XX 3V family.
Features
Drop in Replacements for MAX3221, MAX3222,
MAX3223, MAX3232, MAX3241, MAX3243, SP3243
ICL3222 is Low Power, Pin Compatible Upgrade for 5V
MAX242, and SP312A
ICL3232 is Low Power Upgrade for HIN232/ICL232 and
Pin Compatible Competitor Devices
Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
Latch-Up Free
On-Chip Voltage Converters Require Only Four External
0.1
μ
F Capacitors
Manual and Automatic Powerdown Features (Except
ICL3232)
Guaranteed Mouse Driveability
Receiver Hysteresis For Improved Noise Immunity
Guaranteed Minimum Data Rate . . . . . . . . . . . . 250kbps
Guaranteed Minimum Slew Rate . . . . . . . . . . . . . . . 6V/
μ
s
Wide Power Supply Range. . . . . . . . Single +3V to +5.5V
Low Supply Current in Powerdown State. . . . . . . . . . 1
μ
A
Applications
Any System Requiring RS-232 Communication Ports
- Battery Powered, Hand-Held, and Portable Equipment
- Laptop Computers, Notebooks, Palmtops
- Modems, Printers and other Peripherals
- Digital Cameras
- Cellular/Mobile Phones
TABLE 1. SUMMARY OF FEATURES
PART
NUMBER
NO.OF
Tx.
NO.OF
Rx.
NO. OF
MONITOR Rx.
(R
OUTB
)
DATA
RATE
(kbps)
Rx. ENABLE
FUNCTION
READY
OUTPUT
MANUAL
POWER-
DOWN
AUTOMATIC
POWERDOWN
FUNCTION
ICL3221
1
1
0
250
YES
NO
YES
YES
ICL3222
2
2
0
250
YES
NO
YES
NO
ICL3223
2
2
0
250
YES
NO
YES
YES
ICL3232
2
2
0
250
NO
NO
NO
NO
ICL3241
3
5
2
250
YES
NO
YES
NO
ICL3243
3
5
1
250
NO
NO
YES
YES
Data Sheet
May 2000