DATASHEET
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E
±15kV ESD Protected, +3V to +5.5V, 1µA, 250kbps, RS-232 Transmitters/Receivers
The
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E,
and
ICL3243E
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 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, 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 datasheet, and
AN9863
summarizes the features of each device in the
ICL32xxE 3V family.
FN4910
Rev 23.00
Sep 24, 2018
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 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 at V
CC
= 3.3V
• Manual and automatic power-down features
• Guaranteed mouse driveability (ICL324xE only)
• Receiver hysteresis for improved noise immunity
• Guaranteed minimum data rate: 250kbps
• Wide power supply range: single +3V to +5.5V
• Low supply current in power-down state: 1µA
• Pb-free available (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
Related Literature
For a full list of documents, visit our website:
•
ICL3221E, ICL3222E, ICL3223E, ICL3232E,
ICL3241E,
and
ICL3243E
product information
pages
FN4910 Rev 23.00
Sep 24, 2018
Page 1 of 35
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E
TABLE 1. SUMMARY OF FEATURES
NUMBER OF
MONITOR
RECEIVERS
(R
OUTB
)
0
0
0
0
2
1
DATA
RATE
(kbps)
250
250
250
250
250
250
RECEIVER
ENABLE
FUNCTION?
Yes
Yes
Yes
No
Yes
No
AUTOMATIC
POWER-DOWN
MANUAL
FUNCTION?
POWER-DOWN?
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
No
No
Yes
PART
NUMBER NUMBER
NUMBER
OF Tx
OF Rx
ICL3221E
ICL3222E
ICL3223E
ICL3232E
ICL3241E
ICL3243E
1
2
2
2
3
3
1
2
2
2
5
5
READY
OUTPUT?
No
No
No
No
No
No
FN4910 Rev 23.00
Sep 24, 2018
Page 2 of 35
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E
Contents
Typical Operating Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Thermal Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Electrical Specifications
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14
14
14
14
15
15
15
15
17
18
Detailed Description . . . . . . . . . . . . . . . . . . . . . . . . .
Charge-Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmitters . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Power Operation . . . . . . . . . . . . . . . . . . . . . . . .
Pin-Compatible Replacements for 5V Devices. . . . . . .
Power-Down Functionality (Except ICL3232E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Software Controlled (Manual) Power-Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Power-Down (ICL3221E, ICL3223E, and ICL3243E Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receiver ENABLE Control (ICL3221E, ICL3222E, ICL3223E, and ICL3241E Only) . . . . . . . . . . . . . . . . . . .
Capacitor Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Power Supply Decoupling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Operation Down to 2.7V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Transmitter Outputs when Exiting Power-Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Mouse Driveability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
High Data Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Interconnection with 3V and 5V Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
±15kV ESD Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Human Body Model (HBM) Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
IEC61000-4-2 Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Typical Performance Curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Die Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Package Outline Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
FN4910 Rev 23.00
Sep 24, 2018
Page 3 of 35
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E
Typical Operating Circuits
ICL3221E
C
3
(OPTIONAL CONNECTION, NOTE)
+3.3V
15
V
CC
V+
3
+ C
3
0.1µF
C
4
+ 0.1µF
T1
OUT
R1
IN
RS-232
LEVELS
+
V- 7
T
1
13
8
R
1
1 EN
FORCEOFF
12
FORCEON
GND
14
INVALID
16
10
V
CC
TO POWER
CONTROL LOGIC
5kΩ
+
0.1µF
C
1
0.1µF
C
2
0.1µF
2
+ C1+
4
C1-
5
+ C2+
6
C2-
11
T1
IN
TTL/CMOS
LOGIC LEVELS
R1
OUT
9
NOTE: THE NEGATIVE TERMINAL OF C3 CAN BE CONNECTED TO EITHER VCC OR GND
ICL3222E
C
3
(OPTIONAL CONNECTION, NOTE)
+3.3V
+
0.1µF
+
2
4
5
+
6
12
11
C1+
C1-
C2+
C2-
T
1
T
2
V-
17
V
CC
3
V+
7
+
15
8
T2
OUT
14
R
1
R2
OUT
10
1 EN
R
2
5kΩ
18
5kΩ
9
R2
IN
RS-232
LEVELS
+ C
3
0.1µF
C
4
0.1µF
+
T1
OUT
R1
IN
GND
16
SHDN
V
CC
C
1
0.1µF
C
2
0.1µF
T1
IN
T2
IN
TTL/CMOS
LOGIC LEVELS
R1
OUT
13
NOTE: THE NEGATIVE TERMINAL OF C3 CAN BE CONNECTED TO EITHER VCC OR GND
FN4910 Rev 23.00
Sep 24, 2018
Page 4 of 35
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E
Typical Operating Circuits
(Continued)
ICL3223E
+3.3V
+
0.1µF
2
+
4
5
+
6
13
12
C1+
C1-
C2+
C2-
T
1
T
2
19
V
CC
V+
3
+ C
3
0.1µF
C
4
0.1µF
+
T1
OUT
T2
OUT
RS-232
LEVELS
C
1
0.1µF
C
2
0.1µF
V- 7
17
8
T1
IN
T2
IN
TTL/CMOS
LOGIC LEVELS
R1
OUT
15
R
1
5kΩ
16
R1
IN
R2
OUT
10
1
EN
R
2
5kΩ
9
R2
IN
FORCEOFF
14
FORCEON
GND
18
INVALID
20
11
V
CC
TO POWER
CONTROL LOGIC
ICL3232E
+3.3V
16
V
CC
V+
2
+ C
3
0.1µF
C
4
0.1µF
+
T1
OUT
T2
OUT
13
R
1
R2
OUT
9
R
2
GND
15
5kΩ
5kΩ
8
R2
IN
R1
IN
+
V-
T
1
T
2
6
14
7
RS-232
LEVELS
+
0.1µF
1
+
+
3
4
5
11
10
12
C1+
C1-
C2+
C2-
C
3
(OPTIONAL CONNECTION, NOTE)
C
1
0.1µF
C
2
0.1µF
T1
IN
T2
IN
R1
OUT
TTL/CMOS
LOGIC LEVELS
NOTE: THE NEGATIVE TERMINAL OF C3 CAN
BE CONNECTED TO EITHER VCC OR GND
FN4910 Rev 23.00
Sep 24, 2018
Page 5 of 35
