FN4910 Rev.24.00 Page 1 of 39
May 30, 2019
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E
±15kV ESD Protected, +3V to +5.5V, 1µA, 250kbps, RS-232 Transmitters/Receivers
Datasheet
The ICL3221E, ICL3222E, ICL3223E, ICL3232E,
ICL3241E, and ICL3243E are 3.0V to 5.5V powered
RS-232 transmitters/receivers that meet ElA/TIA-232
and V.28/V.24 specifications, even at VCC = 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 notebook and laptop
computers in which the low operational power
consumption and even lower standby power
consumption is critical. Efficient on-chip charge
pumps, coupled with manual and automatic
power-down functions (except for the ICL3232E),
reduce the standby supply current to a 1µA trickle.
Small footprint packaging and the use of small, low
value capacitors ensure board space savings. Data
rates greater than 250kbps are ensured 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 ICL324XE 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 ICL3221E, ICL3223E, and ICL3243E feature an
automatic power-down function that powers down the
on-chip power supply and driver circuits. Power-down
occurs when an attached peripheral device is shut off
or the RS-232 cable is removed, which conserves
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 on page 2 summarizes the features of the
devices represented by this datasheet, and
Application Note AN9863 summarizes the features of
each device in the ICL32xxE 3V family.
Related Literature
For a full list of documents, visit our website:
ICL3221E, ICL3222E, ICL3223E, ICL3232E,
ICL3241E, and ICL3243E device pages
Features
ESD protection for RS-232 I/O pins to ±15kV
(IEC61000)
Drop-in replacements for the MAX3221E,
MAX3222E, MAX3223E, MAX3232E, MAX3241E,
MAX3243E, and SP3243E
The ICL3221E is a low-power, pin-compatible
upgrade for the 5V MAX221E
The ICL3222E is a low-power, pin-compatible
upgrade for the 5V MAX242E and SP312E
The ICL3232E is a low-power upgrade for the
HIN232E, ICL232, and pin-compatible competitor
devices
RS-232 compatible with VCC = 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 at VCC = 3.3V
Manual and automatic power-down features
Ensured mouse driveability (ICL324xE only)
Receiver hysteresis for improved noise immunity
Ensured minimum data rate: 250kbps
Wide power supply range: single +3V to +5.5V
Low supply current in power-down state: 1µA
Pb-free (RoHS compliant)
Applications
Any system requiring RS-232 communication ports
Battery powered, hand-held, and portable
equipment
Laptop computers and notebooks
Modems, printers, and other peripherals
Digital cameras
Cellular/mobile phones
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E
FN4910 Rev.24.00 Page 2 of 39
May 30, 2019
Table 1. Summary of Features
Part
Number
Number of
Tx
Number of
Rx
Number of
Monitor
Receivers
(Routb)
Data
Rate
(kbps)
Receiver
Enable
Function?
Ready
Output?
Manual
Power-Down?
Automatic
Power-Down
Function?
ICL3221E 1 1 0 250 Yes No Yes Yes
ICL3222E 2 2 0 250 Yes No Yes No
ICL3223E 2 2 0 250 Yes No Yes Yes
ICL3232E 2 2 0 250 No No No No
ICL3241E 3 5 2 250 Yes No Yes No
ICL3243E 3 5 1 250 No No Yes Yes
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E
FN4910 Rev.24.00 Page 3 of 39
May 30, 2019
Contents
1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Typical Operating Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 Pin Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.4 Pin Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2. Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2 Thermal Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.3 Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.4 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3. Typical Performance Curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4. Application Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1 Charge-Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1.1 Charge-Pump Abs Max Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2 Transmitters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3 Receivers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.4 Low Power Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.5 Power-Down Functionality (Except ICL3232E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.5.1 Software Controlled (Manual) Power-Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.5.2 INVALID Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.5.3 Automatic Power-Down (ICL3221E, ICL3223E, and ICL3243E Only) . . . . . . . . . . . . . . . . . . . . . . 20
4.6 Receiver ENABLE Control (ICL3221E, ICL3222E, ICL3223E, and ICL3241E Only) . . . . . . . . . . . . . 21
4.7 Capacitor Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.8 Power Supply Decoupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.9 Operation Down to 2.7V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.10 Transmitter Outputs when Exiting Power-Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.11 Mouse Driveability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.12 High Data Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.13 Interconnection with 3V and 5V Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.14 Pin-Compatible Replacements for 5V Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5. ±15kV ESD Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.1 Human Body Model (HBM) Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.2 IEC61000-4-2 Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.3 Air-Gap Discharge Test Method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.4 Contact Discharge Test Method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6. Die Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7. Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8. Package Outline Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E 1. Overview
FN4910 Rev.24.00 Page 4 of 39
May 30, 2019
1. Overview
1.1 Typical Operating Circuits
ICL3221E
ICL3222E
15
VCC
T1OUT
T1IN
T1
0.1µF
+0.1µF
+
0.1µF
11 13
2
4
3
7
V+
V-
C1+
C1-
C2+
C2-
+
0.1µF
5
6
R1OUT R1IN
R1
89
5kΩ
C1
C2
+C3
C4
EN
1
GND
+3.3V +0.1µF
14
TTL/CMOS
Logic Levels
RS-232
Levels
FORCEON
FORCEOFF
12
16 VCC
10
INVALID To Power
Control Logic
+
C3 (Optional Connection, Note)
Note: The negative terminal of C3 can be connected to either VCC or GND
17
VCC
T1OUT
T2OUT
T1IN
T2IN
T1
T2
0.1µF
+0.1µF
+
0.1µF
12
11
15
8
2
4
3
7
V+
V-
C1+
C1-
C2+
C2-
+
0.1µF
5
6
R1OUT R1IN
14
5kΩ
R2OUT R2IN
9
10
5kΩ
13
C1
C2
+C3
C4
EN
SHDN
1
GND
18
+3.3V +0.1µF
16
VCC
TTL/CMOS
Logic Levels
RS-232
Levels
R1
R2
+
C3 (Optional Connection, Note)
Note: The negative terminal of C3 can be connected to either VCC or GND
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E 1. Overview
FN4910 Rev.24.00 Page 5 of 39
May 30, 2019
ICL3223E
ICL3232E
19
VCC
T1OUT
T2OUT
T1IN
T2IN
T1
T2
0.1µF
+0.1µF
+
0.1µF
13
12
17
8
2
4
3
7
V+
V-
C1+
C1-
C2+
C2-
+
0.1µF
5
6
R1OUT R1IN
16
5kΩ
R2OUT R2IN
910
5kΩ
15
C1
C2
+C3
C4
EN
1
GND
+3.3V +0.1µF
18
TTL/CMOS
Logic Levels
RS-232
Levels
R1
R2
FORCEON
FORCEOFF
14
20 VCC
11
INVALID To Power
Control Logic
16
VCC
T1OUT
T2OUT
T1IN
T2IN
T1
T2
0.1µF
+
0.1µF
+
0.1µF
11
10
14
7
1
3
2
6
V+
V-
C1+
C1-
C2+
C2-
+
0.1µF
4
5
R1OUT R1IN
13
5kΩ
R2OUT R2IN
8
9
5kΩ
12
C1
C2
+C3
C4
GND
+3.3V +0.1µF
15
TTL/CMOS
Logic Levels
RS-232
Levels
R1
R2
+
C3 (Optional Connection, Note)
Note: The negative terminal of C3 can be connected to either VCC or GND
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E 1. Overview
FN4910 Rev.24.00 Page 6 of 39
May 30, 2019
1.2 Ordering Information
ICL3241E ICL3243E
Part Number
(Notes 2, 3)
Part
Marking
Temp
Range (°C)
Tape and Reel
(Units) (Note 1)
Package (RoHS
Compliant)
Pkg.
Dwg. #
ICL3221ECAZ ICL32 21ECAZ 0 to +70 - 16 Ld SSOP M16.209
ICL3221ECAZ-T ICL32 21ECAZ 0 to +70 1k 16 Ld SSOP M16.209
ICL3221ECAZ-T7A ICL32 21ECAZ 0 to +70 250 16 Ld SSOP M16.209
ICL3221ECVZ 3221 ECVZ 0 to +70 - 16 Ld TSSOP M16.173
ICL3221ECVZ-T 3221 ECVZ 0 to +70 2.5k 16 Ld TSSOP M16.173
ICL3221EIAZ ICL32 21EIAZ -40 to +85 - 16 Ld SSOP M16.209
ICL3221EIAZ-T ICL32 21EIAZ -40 to +85 1k 16 Ld SSOP M16.209
ICL3221EIAZ-T7A ICL32 21EIAZ -40 to +85 250 16 Ld SSOP M16.209
ICL3221EIVZ 3221 EIVZ -40 to +85 - 16 Ld TSSOP M16.173
ICL3221EIVZ-T 3221 EIVZ -40 to +85 2.5k 16 Ld TSSOP M16.173
ICL3221EIVZ-T7A 3221 EIVZ -40 to +85 250 16 Ld TSSOP M16.173
ICL3222ECAZ ICL32 22ECAZ 0 to +70 - 20 Ld SSOP M20.209
26
VCC
T1OUT
T2OUT
T3OUT
T1IN
T2IN
T3IN
T1
T2
T3
0.1µF
+0.1µF
+
0.1µF
14
13
9
10
12 11
28
24
27
3
V+
V-
C1+
C1-
C2+
C2-
+
0.1µF
1
2
R1OUT R1IN
4
5kΩ
R2OUT R2IN
518
5kΩ
R3OUT R3IN
617
5kΩ
R4OUT R4IN
716
5kΩ
R5OUT R5IN
R5
815
5kΩ
19
R2OUTB
C1
C2
+C3
C4
EN
SHDN
23
GND
22
+3.3V +0.1µF
20
25
VCC
TTL/CMOS
Logic
RS-232
Levels
RS-232
Levels
R1OUTB
21
R1
R2
R3
R4
Levels
26
VCC
T1OUT
T2OUT
T3OUT
T1IN
T2IN
T3IN
T1
T2
T3
0.1µF
+0.1µF
+
0.1µF
14
13
9
10
12 11
28
24
27
3
V+
V-
C1+
C1-
C2+
C2-
+
0.1µF
1
2
R1OUT R1IN
4
5kΩ
R2OUT R2IN
518
5kΩ
R3OUT R3IN
617
5kΩ
R4OUT R4IN
716
5kΩ
R5OUT R5IN
R5
815
5kΩ
19
R2OUTB
C1
C2
+C3
C4
FORCEON
FORCEOFF
23
GND
22
+3.3V +0.1µF
20
25
VCC
TTL/CMOS
Logic
RS-232
Levels
RS-232
Levels
R1
R2
R3
R4
21
INVALID
To Power
Control
Levels
Logic
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E 1. Overview
FN4910 Rev.24.00 Page 7 of 39
May 30, 2019
ICL3222ECAZ-T ICL32 22ECAZ 0 to +70 1k 20 Ld SSOP M20.209
ICL3222ECVZ ICL32 22ECVZ 0 to +70 - 20 Ld TSSOP M20.173
ICL3222ECVZ-T ICL32 22ECVZ 0 to +70 2.5k 20 Ld TSSOP M20.173
ICL3222EIAZ ICL32 22EIAZ -40 to +85 - 20 Ld SSOP M20.209
ICL3222EIAZ-T ICL32 22EIAZ -40 to +85 1k 20 Ld SSOP M20.209
ICL3222EIBZ 3222EIBZ -40 to +85 - 18 Ld SOIC M18.3
ICL3222EIBZ-T 3222EIBZ -40 to +85 1k 18 Ld SOIC M18.3
ICL3222EIVZ ICL32 22EIVZ -40 to +85 - 20 Ld TSSOP M20.173
ICL3222EIVZ-T ICL32 22EIVZ -40 to +85 2.5k 20 Ld TSSOP M20.173
ICL3223ECAZ ICL32 23ECAZ 0 to +70 - 20 Ld SSOP M20.209
ICL3223ECAZ-T ICL32 23ECAZ 0 to +70 1k 20 Ld SSOP M20.209
ICL3223ECVZ (No longer
available, recommended
replacement: ICL3223EIVZ)
ICL32 23ECVZ 0 to +70 - 20 Ld TSSOP M20.173
ICL3223ECVZ-T (No longer
available, recommended
replacement: ICL3223EIVZ-T)
ICL32 23ECVZ 0 to +70 2.5k 20 Ld TSSOP M20.173
ICL3223EIAZ ICL32 23EIAZ -40 to +85 - 20 Ld SSOP M20.209
ICL3223EIAZ-T ICL32 23EIAZ -40 to +85 1k 20 Ld SSOP M20.209
ICL3223EIVZ ICL32 23EIVZ -40 to +85 - 20 Ld TSSOP M20.173
ICL3223EIVZ-T ICL32 23EIVZ -40 to +85 2.5k 20 Ld TSSOP M20.173
ICL3232ECAZ 3232 ECAZ 0 to +70 - 16 Ld SSOP M16.209
ICL3232ECAZ-T 3232 ECAZ 0 to +70 1k 16 Ld SSOP M16.209
ICL3232ECAZ-T7A 3232 ECAZ 0 to +70 250 16 Ld SSOP M16.209
ICL3232ECBZ 3232ECBZ 0 to +70 - 16 Ld SOIC M16.3
ICL3232ECBZ-T 3232ECBZ 0 to +70 1k 16 Ld SOIC M16.3
ICL3232ECBNZ 3232ECBNZ 0 to +70 - 16 Ld SOIC M16.15
ICL3232ECBNZ-T 3232ECBNZ 0 to +70 2.5k 16 Ld SOIC M16.15
ICL3232ECBNZ-T7A 3232ECBNZ 0 to +70 250 16 Ld SOIC M16.15
ICL3232ECV-16Z 3232E CV-16Z 0 to +70 - 16 Ld TSSOP M16.173
ICL3232ECV-16Z-T 3232E CV-16Z 0 to +70 2.5k 16 Ld TSSOP M16.173
ICL3232ECV-16Z-T7A 3232E CV-16Z 0 to +70 250 16 Ld TSSOP M16.173
ICL3232ECV-20Z (No longer
available, recommended
replacement: ICL3232EIV-16Z)
ICL3232 ECV-20Z 0 to +70 - 20 Ld TSSOP M20.173
ICL3232ECV-20Z-T (No longer
available, recommended
replacement:
ICL3232EIV-16Z-T)
ICL3232 ECV-20Z 0 to +70 2.5k 20 Ld TSSOP M20.173
ICL3232EFV-16Z (No longer
available, recommended
replacement:
ICL3232EIV-16Z)
3232E FV-16Z -40 to +125 - 16 Ld TSSOP M16.173
ICL3232EFV-16Z-T (No longer
available, recommended
replacement: ICL3232EIV-16Z-T)
3232E FV-16Z -40 to +125 2.5k 16 Ld TSSOP M16.173
ICL3232EIAZ 3232 EIAZ -40 to +85 - 16 Ld SSOP M16.209
ICL3232EIAZ-T 3232 EIAZ -40 to +85 1k 16 Ld SSOP M16.209
ICL3232EIBZ 3232EIBZ -40 to +85 - 16 Ld SOIC M16.3
Part Number
(Notes 2, 3)
Part
Marking
Temp
Range (°C)
Tape and Reel
(Units) (Note 1)
Package (RoHS
Compliant)
Pkg.
Dwg. #
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E 1. Overview
FN4910 Rev.24.00 Page 8 of 39
May 30, 2019
ICL3232EIBZ-T 3232EIBZ -40 to +85 1k 16 Ld SOIC M16.3
ICL3232EIBNZ 3232EIBNZ -40 to +85 - 16 Ld SOIC M16.15
ICL3232EIBNZ-T 3232EIBNZ -40 to +85 2.5k 16 Ld SOIC M16.15
ICL3232EIV-16Z 3232E IV-16Z -40 to +85 - 16 Ld TSSOP M16.173
ICL3232EIV-16Z-T 3232E IV-16Z -40 to +85 2.5k 16 Ld TSSOP M16.173
ICL3232EIV-16Z-T7A 3232E IV-16Z -40 to +85 250 16 Ld TSSOP M16.173
ICL3232EIV-20Z ICL3232 EIV-20Z -40 to +85 - 20 Ld TSSOP M20.173
ICL3232EIV-20Z-T ICL3232 EIV-20Z -40 to +85 2.5k 20 Ld TSSOP M20.173
ICL3241ECAZ ICL3241 ECAZ 0 to +70 - 28 Ld SSOP M28.209
ICL3241ECAZ-T ICL3241 ECAZ 0 to +70 1k 28 Ld SSOP M28.209
ICL3241ECVZ ICL3241 ECVZ 0 to +70 - 28 Ld TSSOP M28.173
ICL3241ECVZ-T ICL3241 ECVZ 0 to +70 2.5k 28 Ld TSSOP M28.173
ICL3241EIAZ ICL3241 EIAZ -40 to +85 - 28 Ld SSOP M28.209
ICL3241EIAZ-T ICL3241 EIAZ -40 to +85 1k 28 Ld SSOP M28.209
ICL3241EIVZ ICL3241 EIVZ -40 to +85 - 28 Ld TSSOP M28.173
ICL3241EIVZ-T ICL3241 EIVZ -40 to +85 2.5k 28 Ld TSSOP M28.173
ICL3243ECAZ ICL32 43ECAZ 0 to +70 - 28 Ld SSOP M28.209
ICL3243ECAZ-T ICL32 43ECAZ 0 to +70 1k 28 Ld SSOP M28.209
ICL3243ECBZ ICL3243ECBZ 0 to +70 - 28 Ld SOIC M28.3
ICL3243ECBZ-T ICL3243ECBZ 0 to +70 1k 28 Ld SOIC M28.3
ICL3243ECVZ ICL3243 ECVZ 0 to +70 - 28 Ld TSSOP M28.173
ICL3243ECVZ-T ICL3243 ECVZ 0 to +70 2.5k 28 Ld TSSOP M28.173
ICL3243EIAZ ICL32 43EIAZ -40 to +85 - 28 Ld SSOP M28.209
ICL3243EIAZ-T ICL32 43EIAZ -40 to +85 1k 28 Ld SSOP M28.209
ICL3243EIVZ ICL3243 EIVZ -40 to +85 - 28 Ld TSSOP M28.173
ICL3243EIVZ-T ICL3243 EIVZ -40 to +85 2.5k 28 Ld TSSOP M28.173
ICL3243EIVZ-T7A ICL3243 EIVZ -40 to +85 250 28 Ld TSSOP M28.173
Notes:
1. See TB347 for details about reel specifications.
2. These Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations).
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.
3. For Moisture Sensitivity Level (MSL), see the ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E device pages. For more
information about MSL, see TB363.
Part Number
(Notes 2, 3)
Part
Marking
Temp
Range (°C)
Tape and Reel
(Units) (Note 1)
Package (RoHS
Compliant)
Pkg.
Dwg. #
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E 1. Overview
FN4910 Rev.24.00 Page 9 of 39
May 30, 2019
1.3 Pin Configurations
ICL3221E
(16 LD SSOP, TSSOP)
Top View
ICL3222E
(18 LD SOIC)
Top View
ICL3222E
(20 LD SSOP, TSSOP)
Top View
ICL3223E
(20 LD SSOP, TSSOP)
Top View
ICL3232E
(16 LD SOIC, SSOP, TSSOP-16)
Top View
ICL3232E
(20 LD TSSOP-20)
Top View
EN
C1+
V+
C1-
C2+
C2-
V-
R1IN
FORCEOFF
GND
T1OUT
FORCEON
T1IN
R1OUT
VCC
INVALID
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
EN
C1+
V+
C1-
C2+
C2-
V-
T2OUT
R2IN
SHDN
GND
T1OUT
R1IN
R1OUT
T2IN
VCC
T1IN
R2OUT
18
17
16
15
14
13
12
11
10
1
2
3
4
5
6
7
8
9
EN
C1+
V+
C1-
C2+
C2-
V-
T2OUT
R2IN
SHDN
GND
T1OUT
R1IN
R1OUT
T1IN
NC
VCC
NC
T2IN
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
R2OUT
EN
C1+
V+
C1-
C2+
C2-
V-
T2OUT
R2IN
FORCEOFF
GND
T1OUT
R1IN
R1OUT
T1IN
INVALID
VCC
FORCEON
T2IN
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
R2OUT
C1+
V+
C1-
C2+
C2-
V-
T2OUT
R2IN
VCC
T1OUT
R1IN
R1OUT
T1IN
R2OUT
GND
T2IN
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
NC
C1+
V+
C1-
C2+
C2-
V-
T2OUT
R2IN
NC
GND
T1OUT
R1IN
R1OUT
T1IN
NC
VCC
T2IN
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
NC
R2OUT
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E 1. Overview
FN4910 Rev.24.00 Page 10 of 39
May 30, 2019
1.4 Pin Descriptions
ICL3241E
(28 ld SOIC, SSOP, TSSOP)
Top View
ICL3243E
(28 ld SOIC, SSOP, TSSOP)
Top VIew
Pin Function
VCC System power supply input (3.0V to 5.5V)
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
TIN TTL/CMOS compatible transmitter inputs
TOUT ±15kV ESD protected, RS-232 level (nominally ±5.5V) transmitter outputs
RIN ±15kV ESD protected, RS-232 compatible receiver inputs
ROUT TTL/CMOS level receiver outputs
ROUTB TTL/CMOS level, noninverting, always enabled receiver outputs
INVALID Active low output that indicates no valid RS-232 levels are present on any receiver input
EN Active low receiver enable control; does not disable ROUTB outputs
SHDN Active low input to shut down transmitters and on-board power supply to place device in low-power mode
FORCEOFF Active low to shut down transmitters and on-chip power supply, which overrides any automatic circuitry and FORCEON (see
Table 5 on page 18)
FORCEON Active high input to override automatic power-down circuitry, which keeps transmitters active (FORCEOFF must be high)
C2+
C2-
V-
R1IN
R2IN
R3IN
R4IN
R5IN
T1OUT
T3OUT
T3IN
T2IN
T1IN
C1+
VCC
GND
C1-
EN
R1OUTB
R1OUT
R2OUT
R3OUT
R4OUT
R5OUT
V+
SHDN
R2OUTB
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
T2OUT
C2+
C2-
V-
R1IN
R2IN
R3IN
R4IN
R5IN
T1OUT
T3OUT
T3IN
T2IN
T1IN
C1+
VCC
GND
C1-
FORCEON
INVALID
R1OUT
R2OUT
R3OUT
R4OUT
R5OUT
V+
FORCEOFF
R2OUTB
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
T2OUT
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E 2. Specifications
FN4910 Rev.24.00 Page 11 of 39
May 30, 2019
2. Specifications
2.1 Absolute Maximum Ratings
2.2 Thermal Information
Parameter Minimum Maximum Unit
VCC to GND -0.3 6 V
V+ to GND -0.3 7 V
V- to GND +0.3 -7 V
V+ to V- 14 V
Input Voltages
TIN, FORCEOFF, FORCEON, EN, SHDN -0.3 6 V
RIN ±28V
Output Voltages
TOUT ±13.2 V
ROUT
, INVALID -0.3 VCC + 0.3 V
Short-Circuit Duration
TOUT Continuous
ESD Rating See Electrical Specifications” on page 12
Thermal Resistance (Typical) Note 4 θJA (°C/W)
16 Ld Wide SOIC Package 100
16 Ld Narrow SOIC Package 115
18 Ld SOIC Package 75
28 Ld SOIC Package 75
16 Ld SSOP Package 135
20 Ld SSOP Package 122
16 Ld TSSOP Package 145
20 Ld TSSOP Package 140
28 Ld SSOP and TSSOP Packages 100
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions can adversely
impact product reliability and result in failures not covered by warranty.
Note:
4. θJA is measured with the component mounted on a low-effective thermal conductivity test board in free air. See TB379 for details.
Parameter Minimum Maximum Unit
Maximum Junction Temperature (Plastic Package) +150 °C
Maximum Storage Temperature Range -65 +150 °C
Pb-Free Reflow Profile see TB493
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E 2. Specifications
FN4910 Rev.24.00 Page 12 of 39
May 30, 2019
2.3 Recommended Operating Conditions
2.4 Electrical Specifications
Parameter Minimum Maximum Unit
Temperature Range
ICL32xxECX +70 °C
ICL32xxEFX -40° +125 °C
ICL32xxEIX -40 +85 °C
Supply Voltage (VCC) 3.35V
Rx Input Voltage -15 +15 V
Test conditions: VCC = 3.0V to 5.5V, C1 - C4 = 0.1µF; unless otherwise specified. Typicals are at TA = +25°C. Boldface limits apply across the
operating temperature range.
Parameter Test Conditions
Temp
(°C)
Min
(Note 6)Typ
Max
(Note 6)Unit
DC Characteristics
Supply Current, Automatic
Power-Down
All RIN Open, FORCEON = GND, FORCEOFF = VCC
(ICL3221E, ICL3223E, ICL3243E Only)
25 - 1.0 10 µA
Supply Current, Power-Down FORCEOFF = SHDN = GND (Except ICL3232E) 25 - 1.0 10 µA
Supply Current,
Automatic Power-Down
Disabled
All Outputs Unloaded,
FORCEON =
FORCEOFF = SHDN =
VCC
VCC = 3.0V, ICL3241,
ICL3243
25 - 0.3 1.0 mA
VCC = 3.0V, ICL3223 25 - 0.7 3.0 mA
VCC = 3.15V, ICL3221,
ICL3222, ICL3223,
ICL3232
25 - 0.3 1.0 mA
Logic and Transmitter Inputs, Receiver Outputs
Input Logic Threshold Low TIN, FORCEON, FORCEOFF, EN, SHDN Full --0.8 V
Input Logic Threshold High TIN, FORCEON,
FORCEOFF, EN, SHDN
VCC = 3.3V Full 2.0 --V
VCC = 5.0V Full 2.4 --V
Input Leakage Current TIN, FORCEON,
FORCEOFF, EN, SHDN
All but ICL3232EF Full -±0.01 ±1.0 µA
ICL3232EF Full -±0.01 ±10 µA
Output Leakage Current
(Except ICL3232E)
FORCEOFF = GND or EN = VCC Full -±0.05 ±10 µA
Output Voltage Low IOUT = 1.6mA Full --0.4 V
Output Voltage High IOUT = -1.0mA All but ICL3232EF Full VCC - 0.6 VCC - 0.1 -V
ICL3232EF Full VCC - 0.9 VCC - 0.1 -V
Automatic Powerdown (ICL3221E, ICL3223E, ICL3243E only, FORCEON = GND, FORCEOFF = VCC)
Receiver Input Thresholds to
Enable Transmitters
ICL32xxE Powers Up (see Figure 6 on page 14)Full-2.7 -2.7 V
Receiver Input Thresholds to
Disable Transmitters
ICL32xxE Powers Down (see Figure 6 on page 14)Full -0.3 -0.3 V
INVALID Output Voltage Low IOUT = 1.6mA Full --0.4 V
INVALID Output Voltage High IOUT = -1.0mA Full VCC - 0.6 --V
Receiver Threshold to
Transmitters Enabled Delay
(tWU)
25 -100 -µs
Receiver Positive or Negative
Threshold to INVALID High
Delay (tINVH)
25 -1-µs
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E 2. Specifications
FN4910 Rev.24.00 Page 13 of 39
May 30, 2019
Receiver Positive or Negative
Threshold to INVALID Low
Delay (tINVL)
25 - 30 - µs
Receiver Inputs
Input Voltage Range 25 -25 - 25 V
Input Threshold Low VCC = 3.3V 25 0.6 1.2 - V
VCC = 5.0V 25 0.8 1.5 - V
Input Threshold High VCC = 3.3V 25 - 1.5 2.4 V
VCC = 5.0V 25 - 1.8 2.4 V
Input Hysteresis 25 - 0.5 - V
Input Resistance 25 3 5 7
Transmitter Outputs
Output Voltage Swing All Transmitter Outputs Loaded with 3kΩ to Ground Full ±5.0 ±5.4 -V
Output Resistance VCC = V+ = V- = 0V, Transmitter Output = ±2V Full 300 10M -Ω
Output Short-Circuit Current Full -±35 ±60 mA
Output Leakage Current VOUT = ±12V, VCC = 0V or 3V to 5.5V,
Automatic Power-Down or
FORCEOFF = SHDN = GND
Full --±25 µA
Mouse Driveability (ICL324XE Only)
Transmitter Output Voltage
(see Figure 15 on page 22)
T1IN = T2IN = GND, T3IN = VCC, T3OUT Loaded with
3kΩ to GND, T1OUT and T2OUT Loaded with 2.5mA
Each
Full ±5 --V
Timing Characteristics
Maximum Data Rate RL = 3kΩ, CL = 1000pF, One Transmitter Switching Full 250 500 - kbps
Receiver Propagation Delay Receiver Input to
Receiver Output,
CL= 150pF
tPHL 25 - 0.15 - µs
tPLH 25 - 0.15 - µs
Receiver Output Enable Time Normal Operation (Except ICL3232E) 25 - 200 - ns
Receiver Output Disable Time Normal Operation (Except ICL3232E) 25 - 200 - ns
Transmitter Skew tPHL to tPLH (Note 5) 25 - 100 - ns
Receiver Skew tPHL to tPLH 25 - 50 - ns
Transition Region Slew Rate VCC = 3.3V,
RL = 3kΩ to 7kΩ,
Measured from 3V to
-3V or -3V to 3V
CL = 150pF to 2500pF 25 4 - 30 V/µs
CL = 150pF to 1000pF 25 6 - 30 V/µs
ESD Performance
RS-232 Pins (TOUT, RIN) Human Body Model 25 - ±15 - kV
IEC61000-4-2 Contact Discharge 25 - ±8 - kV
IEC61000-4-2 Air Gap Discharge 25 - ±15 - kV
All Other Pins Human Body Model 25 - ±2 - kV
Notes:
5. Transmitter skew is measured at the transmitter zero crossing points.
6. Parameters with Min and/or Max limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by
characterization and are not production tested.
Test conditions: VCC = 3.0V to 5.5V, C1 - C4 = 0.1µF; unless otherwise specified. Typicals are at TA = +25°C. Boldface limits apply across the
operating temperature range. (Continued)
Parameter Test Conditions
Temp
(°C)
Min
(Note 6)Typ
Max
(Note 6)Unit
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E 3. Typical Performance Curves
FN4910 Rev.24.00 Page 14 of 39
May 30, 2019
3. Typical Performance Curves
VCC = 3.3V, TA = +25°C.
Figure 1. Transmitter Output Voltage vs Load
Capacitance
Figure 2. Slew Rate vs Load Capacitance
Figure 3. Supply Current vs Load Capacitance When
Transmitting Data
Figure 4. Supply Current vs Load Capacitance When
Transmitting Data
Figure 5. Supply Current vs Load Capacitance When
Transmitting Data
Figure 6. Supply Current vs Supply Voltage
-6
-4
-2
0
2
4
6
1000 2000 3000 4000 50000
Load Capacitance (pF)
Transmitter Output Voltage (V)
1 Transmitter at 250kbps
VOUT+
VOUT -
1 or 2 Transmitters at 30kbps
Load Capacitance (pF)
Slew Rate (V/µs)
0 1000 2000 3000 4000 5000
5
10
15
20
25
+Slew
-Slew
0
5
10
15
20
25
30
45
35
40
0 1000 2000 3000 4000 5000
Load Capacitance (pF)
Supply Current (mA)
20kbps
250kbps
120kbps
ICL3221E
0
5
10
15
20
25
30
45
35
40
0 1000 2000 3000 4000 5000
Load Capacitance (pF)
Supply Current (mA)
20kbps
250kbps
120kbps
ICL3222E, ICL3223E, ICL3232E
10
15
20
25
30
45
35
40
01000 2000 3000 4000 5000
Load Capacitance (pF)
Supply Current (mA)
20kbps
250kbps
120kbps
ICL324XE
Supply Current (mA)
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
0
0.5
1.0
1.5
2.0
Supply Voltage (V)
2.5
3.0
3.5 No Load
All Outputs Static
ICL3221E, ICL3222E, ICL3223E, ICL3232E
ICL324XE
ICL324XE
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E 4. Application Information
FN4910 Rev.24.00 Page 15 of 39
May 30, 2019
4. Application Information
The ICL32xxE interface ICs operate from a single +3V to +5.5V supply, ensure a 250kbps minimum data rate,
require only four small external 0.1µF capacitors, feature low power consumption, and meet all ElA RS-232C and
V.28 specifications.
4.1 Charge-Pump
The ICL32xxE family uses regulated on-chip dual charge-pumps as voltage doublers, and voltage inverters to
generate ±5.5V transmitter supplies from a VCC supply as low as 3.0V. The charge-pumps allow the devices to
maintain RS-232 compliant output levels over the ±10% tolerance range of 3.3V powered systems. The efficient
on-chip power supplies require only four small external 0.1µF capacitors for the voltage doubler and inverter
functions at VCC = 3.3V. See Capacitor Selection” on page 21 and Table 6 on page 21 for capacitor
recommendations for other operating conditions. The charge-pumps operate discontinuously (they turn off as
soon as the V+ and V- supplies are pumped up to the nominal values) and provide significant power savings.
4.1.1 Charge-Pump Abs Max Ratings
These 3V to 5V RS-232 transceivers have been fully characterized for 3.0V to 3.6V operation, and at critical
points for 4.5V to 5.5V operation. Furthermore, load conditions were favorable using static logic states only.
The specified maximum values for V+ and V- are +7V and -7V, respectively. These limits apply for VCC values set
to 3.0V and 3.6V (see Tab le 2). For VCC values set to 4.5V and 5.5V, the maximum values for V+ and
V- can approach +9V and -7V, respectively (Tab le 3). The breakdown characteristics for V+ and V- were
measured with ±13V.
Table 2. V+ and V- Values for VCC = 3.0V to 3.6V
C1 (μF) C2, C3, C4 (μF) Load
T1IN
(Logic State)
V+ (V) V- (V)
VCC = 3.0V VCC = 3.6V VCC = 3.0V VCC = 3.6V
0.1 0.1 Open H 5.80 6.56 -5.60 -5.88
L 5.80 6.56 -5.60 -5.88
2.4kbps 5.80 6.56 -5.60 -5.88
3kΩ // 1000pF H 5.88 6.60 -5.56 -5.92
L 5.76 6.36 -5.56 -5.76
2.4kbps 6.00 6.64 -5.64 -5.96
0.047 0.33 Open H 5.68 6.00 -5.60 -5.60
L 5.68 6.00 -5.60 -5.60
2.4kbps 5.68 6.00 -5.60 -5.60
3kΩ // 1000pF H 5.76 6.08 -5.64 -5.64
L 5.68 6.04 -5.60 -5.60
2.4kbps 5.84 6.16 -5.64 -5.72
1 1 Open H 5.88 6.24 -5.60 -5.60
L 5.88 6.28 -5.60 -5.64
2.4kbps 5.80 6.20 -5.60 -5.60
3kΩ // 1000pF H 5.88 6.44 -5.64 -5.72
L 5.88 6.04 -5.64 -5.64
2.4kbps 5.92 6.40 -5.64 -5.64