ICL3225E, ICL3227E, ICL3245E
®
Data Sheet
February 27, 2006
FN4900.9
±15kV ESD Protected, +3V to +5.5V,
1Microamp, 1Mbps, RS-232 Transceivers
with Enhanced Automatic Powerdown
Features
• Pb-Free Plus Anneal Available (RoHS Compliant)
(see Ordering Info)
The Intersil ICL32XXE devices are 3.0V to 5.5V powered
RS-232 transmitters/receivers which meet ElA/TIA-232 and
• ESD Protection for RS-232 I/O Pins to ±15kV (IEC61000)
• Manual and Enhanced Automatic Powerdown Features
V.28/V.24 specifications, even at V
= 3.0V. Additionally,
CC
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 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 enhanced automatic powerdown
functions, reduce the standby supply current to a 1µA trickle.
Small footprint packaging, and the use of small, low value
capacitors ensure board space savings as well. Data rates
greater than 1Mbps 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.
• Drop in Replacements for MAX3225E, MAX3227E,
MAX3245E
• RS-232 Compatible with V
CC
= 2.7V
• Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
• Latch-Up Free
• On-Chip Voltage Converters Require Only Four External
0.1µF Capacitors
• Guaranteed Mouse Driveability (ICL3245E)
• “Ready to Transmit” Indicator Output
(ICL3225E/ICL3227E)
• Receiver Hysteresis For Improved Noise Immunity
• Guaranteed Minimum Data Rate . . . . . . . . . . . . . . 1Mbps
• Low Skew at Transmitter/Receiver Input Trip Points . . . 10ns
• Guaranteed Minimum Slew Rate . . . . . . . . . . . . . . 24V/µs
• Wide Power Supply Range . . . . . . . Single +3V to +5.5V
• Low Supply Current in Powerdown State. . . . . . . . . . .1µA
The ICL3245E is a 3 driver, 5 receiver device that provides a
complete serial port suitable for laptop or notebook
computers. It also includes a noninverting always-active
receiver for “wake-up” capability.
These devices, feature an enhanced automatic
powerdown function which powers down the on-chip power-
supply and driver circuits. This occurs when all receiver and
transmitter inputs detect no signal transitions for a period of
30s. These devices power back up, automatically, whenever
they sense a transition on any transmitter or receiver input.
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
Table 1 summarizes the features of the device represented
by this data sheet, while Application Note AN9863
summarizes the features of each device comprising the
ICL32XXE 3V family.
- Cellular/Mobile Phones
TABLE 1. SUMMARY OF FEATURES
ENHANCED
AUTOMATIC
POWERDOWN
FUNCTION?
NO. OF
DATA
RATE
(kbps)
MANUAL
POWER-
DOWN?
NO. OF NO.OF
MONITOR Rx.
Rx. ENABLE
FUNCTION?
READY
PART NUMBER
ICL3225E
Tx.
2
Rx.
2
(R
)
OUTPUT?
OUTB
0
1000
1000
1000
No
No
No
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
ICL3227E
1
1
0
1
ICL3245E
3
5
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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