intersil ICL3224, ICL3226, ICL3238, ICL3244 DATA SHEET
®
www.BDTIC.com/Intersil
ICL3224, ICL3226, ICL3238, ICL3244
Data Sheet March 1, 2006
1 Microamp, +3V to +5.5V, 250kbps,
RS-232 Transceivers with Enhanced
Automatic Powerdown
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
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 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 ICL3244 is a 3 driver, 5 receiver device that provides a
complete serial port suitable for laptop or notebook
computers. The ICL3244/38 also include a noninverting
always-active receiver for RING INDICATOR monitoring.
These devices feature an enhanced automatic
powerdown function which powers down the on-chip powersupply and driver circuits. This occurs when all receiver and
transmitter inputs detect no signal transitions for a period of
30sec. 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
ICL32XX 3V family.
= 3.0V. Targeted
CC
FN4876.10
Features
• Pb-Free Plus Anneal Available (RoHS Compliant)
•
±15kV ESD Protected (Human Body Model)
• Manual and Enhanced Automatic Powerdown Features
• Drop in Replacements for MAX3224, MAX3226,
MAX3238, MAX3244
• Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
• Latch-Up Free
• RS-232 Compatible with V
• On-Chip Voltage Converters Require Only Four External
0.1µF Capacitors
• Flow-Through Pinout (ICL3238)
• Guaranteed Mouse Driveability (ICL3244)
• “Ready to Transmit” Indicator Output (ICL3224/26)
• Receiver Hysteresis For Improved Noise Immunity
• Guaranteed Minimum Data Rate . . . . . . . . . . . . . 250kbps
• Guaranteed Minimum Slew Rate . . . . . . . . . . . . . . . 6V/µs
• Wide Power Supply Range . . . . . . . Single +3V to +5.5V
• Low Supply Current in Powerdown State. . . . . . . . . . .1µA
CC
= 2.7V
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
- Data Cradles
Related Literature
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
• AN9863, “3V to +5.5V, 250k-1Mbps, RS-232
Transmitters/Receivers”
TABLE 1. SUMMARY OF FEATURES
PART
NUMBER
ICL3224 2 2 0 250 NO YES YES YES
ICL3226 1 1 0 250 NO YES YES YES
ICL3238 5 3 1 250 NO NO YES YES
ICL3244 3 5 1 250 NO NO YES YES
NO. OF
Tx.
NO. OF
Rx.
1
NO. OF
MONITOR Rx.
)
(R
OUTB
DATA
RATE
(kbps)
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
Rx. ENABLE
FUNCTION?
Copyright © Intersil Americas Inc. 2001, 2002, 2004-2006. All Rights Reserved
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
All other trademarks mentioned are the property of their respective owners.
READY
OUTPUT?
MANUAL
POWER-
DOWN?
ENHANCED
AUTOMATIC
POWERDOWN
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Ordering Information
ICL3224, ICL3226, ICL3238, ICL3244
Ordering Information (Continued)
TEMP.
PART
NUMBER
*
PART
MARKING
RANGE
(°C) PACKAGE
PKG.
DWG. #
ICL3224CA ICL3224CA 0 to 70 20 Ld SSOP M20.209
ICL3224CAZ
(Note)
3224CAZ 0 to 70 20 Ld SSOP
(Pb-free)
M20.209
ICL3224IA ICL3224IA -40 to 85 20 Ld SSOP M20.209
ICL3224IAZ
(Note)
3224IAZ -40 to 85 20 Ld SSOP
(Pb-free)
M20.209
ICL3226CA ICL3226CA 0 to 70 16 Ld SSOP M16.209
ICL3226CAZ
(Note)
ICL3226CAZ 0 to 70 16 Ld SSOP
(Pb-free)
M16.209
ICL3226IA ICL3226IA -40 to 85 16 Ld SSOP M16.209
ICL3226IAZ
(Note)
ICL3226IAZ -40 to 85 16 Ld SSOP
(Pb-free)
M16.209
ICL3238CA ICL3238CA 0 to 70 28 Ld SSOP M28.209
Pinouts
ICL3224 (SSOP)
TOP VIEW
TEMP.
PART
NUMBER
*
ICL3238CAZ
(Note)
PART
MARKING
ICL3238CAZ 0 to 70 28 Ld SSOP
RANGE
(°C) PACKAGE
(Pb-free)
PKG.
DWG. #
M28.209
ICL3238IA ICL3238IA -40 to 85 28 Ld SSOP M28.209
ICL3238IAZ
(Note)
ICL3238IAZ -40 to 85 28 Ld SSOP
(Pb-free)
M28.209
ICL3244CA ICL3244CA 0 to 70 28 Ld SSOP M28.209
ICL3244IA ICL3244IA -40 to 85 28 Ld SSOP M28.209
*Most surface mount devices are available on tape and reel; add “-T”
to suffix.
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.
ICL3226 (SSOP)
TOP VIEW
READY
C1+
V+
C1-
C2+
C2-
T2
OUT
R2
R2
OUT
FORCEOFF
1
2
3
4
5
6
V-
7
8
9
IN
10
20
V
19
GND
18
17
T1
R1
16
R1
15
FORCEON
14
T1
13
12
T2
INVALID
11
CC
OUT
IN
OUT
IN
IN
READY
C1+
V+
C1-
C2+
C2-
R1
16
1
2
3
4
5
6
V-
7
8
IN
FORCEOFF
V
15
CC
GND
14
13
T1
FORCEON
12
T1
11
INVALID
10
R1
9
OUT
IN
OUT
2
FN4876.10
March 1, 2006
Pinouts (Continued)
www.BDTIC.com/Intersil
C2+
1
GND
2
3
C2-
V-
4
T1
5
OUT
T2
6
OUT
T3
7
OUT
R1
8
IN
R2
9
IN
10
T4
OUT
R3
11
IN
T5
12
OUT
FORCEON
FORCEOFF
13
14
ICL3238 (SSOP)
TOP VIEW
ICL3224, ICL3226, ICL3238, ICL3244
C1+
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V+
V
CC
C1T1
IN
T2
IN
T3
IN
R1
OUT
R2
OUT
T4
IN
R3
OUT
T5
IN
R1
OUTB
INVALID
T1
T2
T3
C2+
R1
R2
R3
R4
R5
OUT
OUT
OUT
T3
T2
T1
C2-
V-
IN
IN
IN
IN
IN
IN
IN
IN
ICL3244 (SSOP)
TOP VIEW
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
C1+
V+
27
V
26
CC
GND
25
C1-
24
FORCEON
23
FORCEOFF
22
INVALID
21
20
R2
R1
19
R2
18
R3
17
16
R4
R5
15
OUTB
OUT
OUT
OUT
OUT
OUT
3
FN4876.10
March 1, 2006
ICL3224, ICL3226, ICL3238, ICL3244
www.BDTIC.com/Intersil
Pin Descriptions
PIN FUNCTION
V
CC
V+ Internally generated positive transmitter supply (+5.5V).
V- Internally generated negative transmitter supply (-5.5V).
GND Ground connection.
C1+ External capacitor (voltage doubler) is connected to this lead.
C1- External capacitor (voltage doubler) is connected to this lead.
C2+ External capacitor (voltage inverter) is connected to this lead.
C2- External capacitor (voltage inverter) is connected to this lead.
T
T
OUT
R
R
OUT
R
OUTB
INVALID
READY Active high output that indicates when the ICL32XX is ready to transmit (i.e., V- ≤ -4V)
FORCEOFF
FORCEON Active high input to override automatic powerdown circuitry thereby keeping transmitters active. (FORCEOFF
System power supply input (3.0V to 5.5V).
TTL/CMOS compatible transmitter Input s.
IN
RS-232 level (nominally ±5.5V) transmitter outputs.
RS-232 compatible receiver inputs.
IN
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 low to shut down transmitters and on-chip power supply. This overrides any automatic circuitry and FORCEON (see Table 2).
must be high).
Typical Operating Circuits
ICL3224 ICL3226
+3.3V
TTL/CMOS
LOGIC
LEVELS
C
0.1µF
C
0.1µF
+
0.1µF
2
T2
R1
T1
IN
IN
OUT
OUT
+
4
5
+
6
13
12
15
1
14
C1+
C1-
C2+
C2-
READY
FORCEON
1
2
R2
19
V
CC
T
1
T
2
R
1
R
2
FORCEOFF
GND
18
INVALID
V+
V-
5kΩ
5kΩ
3
7
17
T1
8
T2
16
R1
910
R2
20
11
C
3
+
0.1µF
C
4
0.1µF
+
OUT
OUT
RS-232
LEVELS
IN
IN
V
CC
TO POWER
CONTROL
LOGIC
+3.3V
TTL/CMOS
LOGIC
LEVELS
C
0.1µF
C
0.1µF
R1
+
0.1µF
2
C1+
1
+
4
C1-
5
2
C2+
+
6
C2-
11
T1
IN
OUT
1
READY
12
FORCEON
15
V
CC
T
1
R
1
FORCEOFF
GND
14
V+
V-
5kΩ
INVALID
3
7
13
T1
89
R1
16
10
C
3
+
0.1µF
C
4
0.1µF
+
OUT
RS-232
LEVELS
IN
V
CC
TO POWER
CONTROL
LOGIC
4
FN4876.10
March 1, 2006
ICL3224, ICL3226, ICL3238, ICL3244
www.BDTIC.com/Intersil
Typical Operating Circuits (Continued)
ICL3238
C3 (OPTIONAL
+3.3V
NOTE 3
TTL/CMOS
LOGIC
LEVELS
TO POWER
CONTROL
C
0.1µF
C
0.1µF
R1
V
CC
LOGIC
+
0.1µF
28
1
2
C1+
+
25
C1-
1
C2+
+
3
C2-
24
T1
IN
23
T2
IN
22 7
T3
IN
19 10
T4
IN
17 12
T5
IN
26
V
CC
T
1
T
2
T
3
T
3
T
4
16
OUTB
21
R1
R2
R3
OUT
OUT
OUT
13
FORCEON
14
FORCEOFF
15
INVALID
R
1
R
2
R
3
GND
CONNECTION, NOTE 2)
V+
V-
5kΩ
5kΩ
5kΩ
2
27
4
5
6
8
920
1118
T1
T2
T3
T4
T5
R1
R2
R3
+
OUT
OUT
OUT
OUT
OUT
IN
IN
IN
+
+
C
3
0.1µF
C
4
0.1µF
NOTE 3
RS-232
LEVELS
RS-232
LEVELS
+3.3V
C
0.1µF
C
0.1µF
R2
TTL/CMOS
R1
LOGIC
LEVELS
R2
R3
R4
R5
V
CC
TO POWER
CONTROL LOGIC
ICL3244
+
0.1µF
28
1
2
C1+
+
24
C1-
1
C2+
+
2
C2-
14
T1
IN
13
T2
IN
12 11
T3
IN
20
OUTB
19
OUT
OUT
OUT
OUT
OUT
23
FORCEON
22
FORCEOFF
21
INVALID
V
R
1
R
2
R
3
R
4
R
5
GND
CC
26
T
1
T
2
T
3
25
V+
V-
5kΩ
5kΩ
5kΩ
5kΩ
5kΩ
27
C
3
+
0.1µF
3
C
4
0.1µF
+
9
T1
OUT
10
T2
T3
OUT
OUT
RS-232
LEVELS
4
R1
IN
518
R2
IN
617
R3
RS-232
LEVELS
IN
716
R4
IN
815
R5
IN
NOTES:
1. THE NEGATIVE TERMINAL OF C
OR GND.
V
CC
2. FOR V
= 3.15V (3.3V -5%), USE C1 - C4 = 0.1µF OR GREATER. FOR
CC
= 3.0V (3.3V -10%), USE C1 - C4 = 0.22µF.
V
CC
CAN BE CONNECTED TO EITHER
3
5
FN4876.10
March 1, 2006
ICL3224, ICL3226, ICL3238, ICL3244
www.BDTIC.com/Intersil
Absolute Maximum Ratings Thermal Information
VCC to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V
V+ to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V
V- to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +0.3V to -7V
V+ to V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14V
Input Voltages
, FORCEOFF, FORCEON . . . . . . . . . . . . . . . . . . -0.3V to 6V
T
IN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25V
R
IN
Output Voltages
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±13.2V
T
OUT
, INVALID, READY . . . . . . . . . . . . . . . . -0.3V to VCC +0.3V
R
OUT
Short Circuit Duration
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
T
OUT
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . See Specification Table
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
is measured with the component mounted on a low effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
3. θ
JA
Thermal Resistance (Typical, Note 4) θ
16 Ld SSOP Package . . . . . . . . . . . . . . . . . . . . . . . 140
20 Ld SSOP Package . . . . . . . . . . . . . . . . . . . . . . . 125
28 Ld SSOP Package . . . . . . . . . . . . . . . . . . . . . . . 100
Maximum Junction Temperature (Plastic Package) . . . . . . . 150°C
Maximum Storage Temperature Range . . . . . . . . . .-65°C to 150°C
Maximum Lead Temperature (Soldering 10s). . . . . . . . . . . . 300°C
(Lead Tips Only)
(°C/W)
JA
Operating Conditions
Temperature Range
ICL32XXC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
ICL32XXI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to 85°C
Electrical Specifications Test Conditions: V
Otherwise Specified. Typicals are at T
PARAMETER TEST CONDITIONS
DC CHARACTERISTICS
Supply Current, Automatic
Powerdown
Supply Current, Powerdown FORCEOFF
Supply Current,
Automatic Powerdown Disabled
LOGIC AND TRANSMITTER INPUTS AND RECEIVER OUTPUTS
Input Logic Threshold Low T
Input Logic Threshold High T
Transmitter Input Hysteresis 25 - 0.5 - V
Input Leakage Current T
Output Leakage Current FORCEOFF
Output Voltage Low I
Output Voltage High I
RECEIVER INPUTS
Input Voltage Range Full -25 - 25 V
Input Threshold Low V
Input Threshold High V
Input Hysteresis 25 - 0.5 - V
Input Resistance 25357kΩ
TRANSMITTER OUTPUTS
Output Voltage Swing All Transmitter Outputs Loaded with 3kΩ to Ground Full ±5.0 ±5.4 - V
Output Resistance V
Output Short-Circuit Current Full - ±35 ±60 mA
Output Leakage Current V
All R
Open, FORCEON = GND, FORCEOFF = V
IN
All Outputs Unloaded, FORCEON
= FORCEOFF
, FORCEON, FORCEOFF Full - - 0.8 V
IN
, FORCEON, FORCEOFF VCC = 3.3V Full 2.0 - - V
IN
, FORCEON, FORCEOFF Full - ±0.01 ±1.0 µA
IN
= 1.6mA Full - - 0.4 V
OUT
= -1.0mA Full V
OUT
= 3.3V 25 0.6 1.2 - V
CC
V
= 5.0V 25 0.8 1.5 - V
CC
= 3.3V 25 - 1.5 2.4 V
CC
= 5.0V 25 - 1.8 2.4 V
V
CC
= V+ = V- = 0V, Transmitter Output = ±2V Full 300 10M - Ω
CC
= ±12V, VCC = 0V or 3V to 5.5V,
OUT
Automatic Powerdown or FORCEOFF
= 3V to 5.5V, C1 - C4 = 0.1µF (ICL3238: C1 - C4 = 0.22µF @ VCC = 3V); Unless
CC
= GND 25 - 1.0 10 µA
= V
CC
= GND Full - ±0.05 ±10 µA
= 25°C
A
TEMP
(°C) MIN TYP MAX UNITS
CC
ICL3244, VCC = 3V 25 - 0.3 1.0 mA
All Others, V
V
= 5.0V Full 2.4 - - V
CC
= GND
= 3.15V 25 - 0.3 1.0 mA
CC
25 - 1.0 10 µA
-0.6 V
CC
Full - - ±25 µA
-0.1 - V
CC
6
FN4876.10
March 1, 2006
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