Datasheet
ICL3224E, ICL3226E, ICL3244E
±15kV ESD Protected, +3V to +5.5V, 1µA, 250kbps, RS-232 Transceivers with
Enhanced Automatic Powerdown
The
ICL3224E, ICL3226E,
and
ICL3244E
devices are
3.0V to 5.5V powered RS-232 transmitters/receivers
that meet ElA/TIA-232 and V.28/V.24 specifications,
even at V
CC
= 3.0V. 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 power and even lower standby
power consumption are 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. 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 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.
The ICL3224E, ICL3226E, and ICL3244E feature an
enhanced automatic powerdown function that powers
down the on-chip power supply and driver circuits.
Powerdown 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.
Table 1
summarizes the features of the device
represented by this datasheet and
AN9863
summarizes the features of each device comprising
the ICL32xxE 3V family.
Features
• Pb-Free Plus Anneal Available (RoHS Compliant)
• ESD protection for RS-232 I/O pins to
±
15kV
(IEC61000)
• Manual and enhanced automatic powerdown
• 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 0.1µF capacitors
• Ensured mouse driveability (ICL3244E)
• “Ready to Transmit” indicator output
(ICL3224E/ICL3226E)
• Receiver hysteresis for improved noise immunity
• Ensured minimum data rate 250kbps
• Ensured minimum slew rate 6V/µs
• Wide power supply range single +3V to +5.5V
• Low supply current in powerdown state 1µA
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
For a full list of related documents, visit our website:
•
ICL3224E, ICL3226E,
and
ICL3244E
device pages
FN4899 Rev.7.00
Jun.11.19
Page 1 of 28
ICL3224E, ICL3226E, ICL3244E
Contents
1.
1.1
1.2
1.3
1.4
2.
2.1
2.2
2.3
2.4
3.
4.
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Typical Operating Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
5
6
6
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
8
8
9
Typical Performance Curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Application Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1
4.1.1
4.2
4.3
4.4
4.4.1
4.4.2
4.4.3
4.4.4
4.4.5
4.5
4.6
4.7
4.8
4.9
4.10
4.11
4.12
Charge-Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charge Pump Abs Max Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmitters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Powerdown Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Software Controlled (Manual) Powerdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INVALID Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enhanced Automatic Powerdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Emulating Standard Automatic Powerdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hybrid Automatic Powerdown Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
READY Output (ICL3224E and ICL3226E only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Capacitor Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Supply Decoupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation Down to 2.7V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmitter Outputs when Exiting Powerdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mouse Driveability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High Data Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interconnection with 3V and 5V Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12
12
13
13
15
16
16
17
18
18
19
19
19
19
19
20
20
21
5.
5.1
5.2
5.3
5.4
6.
7.
8.
±15kV ESD Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Human Body Model (HBM) Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IEC61000-4-2 Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air-gap discharge test method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contact Discharge Test Method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22
22
22
22
Die Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Package Outline Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
FN4899 Rev.7.00
Jun.11.19
Page 2 of 28
ICL3224E, ICL3226E, ICL3244E
1. Overview
1.
1.1
Overview
Typical Operating Circuits
+3.3V
+
0.1µF
2
+
4
5
+
6
13
12
15
C1+
C1-
C2+
C2-
19
V
CC
V+
3
+ C
3
0.1µF
C
4
0.1µF
+
T1
OUT
T2
OUT
R1
IN
RS-232
LEVELS
C
1
0.1µF
C
2
0.1µF
V- 7
T
1
T
2
17
8
16
R
1
5kΩ
9
R
2
5kΩ
20
11
T1
IN
T2
IN
TTL/CMOS
LOGIC LEVELS
R1
OUT
R2
OUT
10
R2
IN
1
14
READY
FORCEON
FORCEOFF
INVALID
GND
18
V
CC
TO POWER
CONTROL LOGIC
Figure 1. ICL3224E
+3.3V
+
0.1µF
15
C
1
0.1µF
C
2
0.1µF
2
+ C1+
4
C1-
5
+ C2+
6
C2-
11
9
1
READY
R
1
5kΩ
16
12
FORCEOFF
FORCEON
GND
INVALID
14
10
V
CC
TO POWER
CONTROL LOGIC
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
TTL/CMOS
LOGIC LEVELS
T1
IN
R1
OUT
Figure 2. ICL3226E
FN4899 Rev.7.00
Jun.11.19
Page 3 of 28
ICL3224E, ICL3226E, ICL3244E
1. Overview
+3.3V
C
1
0.1µF
C
2
0.1µF
+
0.1µF
28
C1+
26
V
CC
27
V+
V-
T
1
T
2
T
3
3
9
+
C
3
0.1µF
24
C1-
1
C2+
+
2
C2-
14
+
C
4
0.1µF
+
T1
OUT
T2
OUT
T3
OUT
RS-232
LEVELS
T1
IN
T2
IN
T3
IN
13
12
10
11
20
R2
OUTB
TTL/CMOS
LOGIC LEVELS
19
R
1
18
R
2
17
R3
OUT
R
3
R4
OUT
16
R
4
R5
OUT
15
23
22
21
R
5
FORCEON
FORCEOFF
INVALID GND
25
5kΩ
5kΩ
8
R5
IN
5kΩ
7
R4
IN
5kΩ
6
R3
IN
RS-232
LEVELS
5kΩ
5
R2
IN
4
R1
OUT
R1
IN
R2
OUT
V
CC
TO POWER
CONTROL LOGIC
Figure 3. ICL3244E
FN4899 Rev.7.00
Jun.11.19
Page 4 of 28
ICL3224E, ICL3226E, ICL3244E
1. Overview
1.2
Ordering Information
Part Number
(Notes
2, 3)
Part Marking
3224EIAZ
3224EIAZ
3224ECAZ
Temp Range (°C)
-40 to 85
-40 to 85
0 to 70
1k
Tape and Reel
(Units) (Note
1)
Package
(RoHS Compliant)
20 Ld SSOP
20 Ld SSOP
20 Ld SSOP
Pkg. Dwg. #
M20.209
M20.209
M20.209
ICL3224EIAZ
ICL3224EIAZ-T
ICL3224ECAZ
(No longer
available, recommended
replacement: ICL3224EIAZ)
ICL3224ECAZ-T
(No longer
available, recommended
replacement: ICL3224EIAZ-T)
ICL3226EIAZ
ICL3226EIAZ-T
ICL3226ECAZ
(No longer
available, recommended
replacement: ICL3226EIAZ)
ICL3226ECAZ-T
(No longer
available, recommended
replacement: ICL3226EIAZ-T)
ICL3244EIAZ
ICL3244EIAZ-T
ICL3244ECAZ
(No longer
available, recommended
replacement: ICL3244EIAZ)
ICL3244ECAZ-T
(No longer
available, recommended
replacement: ICL3244EIAZ-T)
3224ECAZ
0 to 70
1k
20 Ld SSOP
M20.209
3226EIAZ
3226EIAZ
3226ECAZ
-40 to 85
-40 to 85
0 to 70
1k
16 Ld SSOP
16 Ld SSOP
16 Ld SSOP
M16.209
M16.209
M16.209
3226ECAZ
0 to 70
1k
16 Ld SSOP
M16.209
ICL3244EIAZ
ICL3244EIAZ
ICL3244ECAZ
-40 to 85
-40 to 85
0 to 70
1k
28 Ld SSOP
28 Ld SSOP
28 Ld SSOP
M28.209
M28.209
M28.209
ICL3244ECAZ
0 to 70
1k
28 Ld SSOP
M28.209
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
ICL3224E, ICL3226E,
and
ICL3244E
device pages. For more information about MSL, see
TB363.
Table 1.
Summary of Features
Number of
Monitor Rx.
(R
OUTB
)
0
0
1
Enhanced
Automatic
Powerdown
Function?
Yes
Yes
Yes
Part Number
ICL3224E
ICL3226E
ICL3244E
Number
of Tx.
2
1
3
Number
of Rx.
2
1
5
Data Rate
(kbps)
250
250
250
Rx. Enable
Function?
No
No
No
Ready
Output?
Yes
Yes
No
Manual
Powerdown?
Yes
Yes
Yes
FN4899 Rev.7.00
Jun.11.19
Page 5 of 28
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