DATASHEET
ICL3224E, ICL3226E, ICL3244E
+/-15kV ESD Protected, +3V to +5.5V, 1Microamp, 250kbps, RS-232 Transceivers
with Enhanced Automatic Powerdown
The Intersil ICL32XXE 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. Additionally,
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 1A 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 ICL3244E 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
30 seconds. These devices power back up, automatically,
whenever they sense a transition on any transmitter or
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
ICL32XXE 3V family.
FN4899
Rev.6.00
Feb 27, 2006
Features
• Pb-Free Plus Anneal Available (RoHS Compliant)
• ESD Protection for RS-232 I/O Pins to
15kV (IEC61000)
• Manual and Enhanced Automatic Powerdown Features
• Drop in Replacements for MAX3224E, MAX3226E,
MAX3244E
• Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
• RS-232 Compatible with V
CC
= 2.7V
• Latch-Up Free
• On-Chip Voltage Converters Require Only Four External
0.1F Capacitors
• Guaranteed Mouse Driveability (ICL3244E)
• “Ready to Transmit” Indicator Output (ICL3224E/26E)
• Receiver Hysteresis For Improved Noise Immunity
• Guaranteed Minimum Data Rate . . . . . . . . . . . . . 250kbps
• Guaranteed Minimum Slew Rate . . . . . . . . . . . . . . . 6V/s
• Wide Power Supply Range . . . . . . . Single +3V to +5.5V
• Low Supply Current in Powerdown State. . . . . . . . . . .1A
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
Related Literature
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
TABLE 1. SUMMARY OF FEATURES
NO. OF
MONITOR Rx.
(R
OUTB
)
0
0
1
DATA
RATE
(kbps)
250
250
250
MANUAL
POWER-
DOWN?
Yes
Yes
Yes
ENHANCED
AUTOMATIC
POWERDOWN
FUNCTION?
Yes
Yes
Yes
PART
NUMBER
ICL3224E
ICL3226E
ICL3244E
NO. OF NO. OF
Tx.
Rx.
2
1
3
2
1
5
Rx. ENABLE
FUNCTION?
No
No
No
READY
OUTPUT?
Yes
Yes
No
FN4899 Rev.6.00
Feb 27, 2006
Page 1 of 20
ICL3224E, ICL3226E, ICL3244E
Ordering Information
PART NO.
ICL3224ECAZ (Note)
ICL3224ECAZ-T (Note)
ICL3224EIA
ICL3224EIA-T
ICL3224EIAZ (Note)
ICL3224EIAZ-T (Note)
ICL3226ECA
ICL3226ECA-T
ICL3226ECAZ (Note)
ICL3226ECAZ-T
ICL3226EIA
ICL3226EIA-T
ICL3226EIAZ
ICL3226EIAZ-T
ICL3244ECA
ICL3244ECA-T
ICL3244ECAZ (Note)
ICL3244ECAZ-T (Note)
ICL3244EIA
ICL3244EIA-T
ICL3244EIAZ (Note)
ICL3244EIAZ-T (Note)
ICL3244EIB
PART MARKING
3224ECAZ
3224ECAZ
ICL3224EIA
ICL3224EIA
3224EIAZ
3224EIAZ
ICL3226ECA
ICL3226ECA
3226ECAZ
3226ECAZ
ICL3226EIA
ICL3226EIA
3226EIAZ
3226EIAZ
ICL3244ECA
ICL3244ECA
ICL3244ECAZ
ICL3244ECAZ
ICL3244EIA
ICL3244EIA
ICL3244EIAZ
ICL3244EIAZ
ICL3244EIB
TEMP. RANGE (°C)
0 to 70
0 to 70
-40 to 85
-40 to 85
-40 to 85
-40 to 85
0 to 70
0 to 70
0 to 70
0 to 70
-40 to 85
-40 to 85
-40 to 85
-40 to 85
0 to 70
0 to 70
0 to 70
0 to 70
-40 to 85
-40 to 85
-40 to 85
-40 to 85
-40 to 85
PACKAGE
20 Ld SSOP (Pb-free)
20 Ld SSOP Tape and Reel (Pb-free)
20 Ld SSOP
20 Ld SSOP Tape and Reel
20 Ld SSOP (Pb-free)
20 Ld SSOP Tape and Reel (Pb-free)
16 Ld SSOP
16 Ld SSOP Tape and Reel
16 Ld SSOP (Pb-free)
16 Ld SSOP Tape and Reel (Pb-free)
16 Ld SSOP
16 Ld SSOP Tape and Reel
16 Ld SSOP (Pb-free)
16 Ld SSOP Tape and Reel (Pb-free)
28 Ld SSOP
28 Ld SSOP Tape and Reel
28 Ld SSOP (Pb-free)
28 Ld SSOP Tape and Reel (Pb-free)
28 Ld SSOP
28 Ld SSOP Tape and Reel
28 Ld SSOP (Pb-free)
28 Ld SSOP Tape and Reel (Pb-free)
28 Ld SOIC
PKG. DWG. #
M20.209
M20.209
M20.209
M20.209
M20.209
M20.209
M16.209
M16.209
M16.209
M16.209
M16.209
M16.209
M16.209
M16.209
M28.209
M28.209
M28.209
M28.209
M28.209
M28.209
M28.209
M28.209
M28.3
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which are 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.
Pinouts
ICL3224E (SSOP)
TOP VIEW
READY 1
C1+ 2
V+
3
20 FORCEOFF
19 V
CC
18 GND
17 T1
OUT
16 R1
IN
15 R1
OUT
14 FORCEON
13 T1
IN
12 T2
IN
11 INVALID
READY 1
C1+ 2
V+
3
ICL3226E (SSOP)
TOP VIEW
16 FORCEOFF
15 V
CC
14 GND
13 T1
OUT
12 FORCEON
11 T1
IN
10 INVALID
9 R1
OUT
C1- 4
C2+ 5
C2- 6
V-
7
C1- 4
C2+ 5
C2- 6
V-
7
T2
OUT
8
R2
IN
9
R2
OUT
10
R1
IN
8
FN4899 Rev.6.00
Feb 27, 2006
Page 2 of 20
ICL3224E, ICL3226E, ICL3244E
Pinouts
(Continued)
ICL3244E (SOIC, SSOP)
TOP VIEW
C2+ 1
C2- 2
V-
3
28 C1+
27 V+
26 V
CC
25 GND
24 C1-
23 FORCEON
22 FORCEOFF
21 INVALID
20 R2
OUTB
19 R1
OUT
18 R2
OUT
17 R3
OUT
16 R4
OUT
15 R5
OUT
R1
IN
4
R2
IN
5
R3
IN
6
R4
IN
7
R5
IN
8
T1
OUT
9
T2
OUT
10
T3
OUT
11
T3
IN
12
T2
IN
13
T1
IN
14
Pin Descriptions
PIN
V
CC
V+
V-
GND
C1+
C1-
C2+
C2-
T
IN
T
OUT
R
IN
R
OUT
R
OUTB
INVALID
READY
System power supply input (3.0V to 5.5V).
Internally generated positive transmitter supply (+5.5V).
Internally generated negative transmitter supply (-5.5V).
Ground connection.
External capacitor (voltage doubler) is connected to this lead.
External capacitor (voltage doubler) is connected to this lead.
External capacitor (voltage inverter) is connected to this lead.
External capacitor (voltage inverter) is connected to this lead.
TTL/CMOS compatible transmitter Inputs.
15kV
ESD Protected
,
RS-232 level (nominally
5.5V)
transmitter outputs.
15kV
ESD Protected
,
RS-232 compatible receiver inputs.
TTL/CMOS level receiver outputs.
TTL/CMOS level, noninverting, always enabled receiver outputs.
Active low output that indicates if no valid RS-232 levels are present on any receiver input.
Active high output that indicates when the ICL32XXE is ready to transmit (i.e., V-
-4V)
FUNCTION
FORCEOFF Active low to shut down transmitters and on-chip power supply. This overrides any automatic circuitry and FORCEON (see Table 2).
FORCEON
Active high input to override automatic powerdown circuitry thereby keeping transmitters active. (FORCEOFF must be high).
FN4899 Rev.6.00
Feb 27, 2006
Page 3 of 20
Microcontroller MCU
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