DATASHEET
ICL3225, ICL3245
1 Microamp, +3V to +5.5V, 1Mbps, 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
CC
= 3.0V. 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 1Mbps 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 ICL3245 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
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 data sheet, while Application Note AN9863
summarizes the features of each device comprising the
ICL32XX 3V family.
FN4878
Rev 9.00
October 5, 2015
Features
•
15kV ESD Protected (Human Body Model)
• Manual and Enhanced Automatic Powerdown Features
• Drop in Replacements for MAX3225, MAX3245
• Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
• Latch-Up Free
• On-Chip Voltage Converters Require Only Four External
0.1F Capacitors
• Guaranteed Mouse Driveability (ICL3245)
• “Ready to Transmit” Indicator Output (ICL3225)
• Receiver Hysteresis For Improved Noise Immunity
• Guaranteed Minimum Data Rate . . . . . . . . . . . . . . 1Mbps
• Low Skew at Transmitter/Receiver Input Trip Points. . . 10ns
• Guaranteed Minimum Slew Rate . . . . . . . . . . . . . . 24V/s
• Wide Power Supply Range . . . . . . . Single +3V to +5.5V
• Low Supply Current in Powerdown State. . . . . . . . . . .1A
•
Pb-Free Plus Anneal Available (RoHS Compliant)
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
1
DATA
RATE
(kbps)
1000
1000
MANUAL
POWER-
DOWN?
Yes
Yes
ENHANCED
AUTOMATIC
POWERDOWN
FUNCTION?
Yes
Yes
PART
NUMBER
ICL3225
ICL3245
NO. OF NO. OF
Tx.
Rx.
2
3
2
5
Rx. ENABLE
FUNCTION?
No
No
READY
OUTPUT?
Yes
No
FN4878 Rev 9.00
October 5, 2015
Page 1 of 19
ICL3225, ICL3245
Ordering Information
PART NO.
ICL3225CAZ (Note)
ICL3225CAZ-T (Note)
PART
MARKING
ICL32 25CAZ
ICL32 25CAZ
TEMP.
RANGE (°C)
0 to 70
0 to 70
0 to 70
PACKAGE
20 Ld SSOP (Pb-free)
20 Ld SSOP Tape and Reel (Pb-free)
20 Ld PDIP* (Pb-free)
PKG. DWG. #
M20.209
M20.209
E20.3
ICL3225CPZ (Note)
No longer
ICL3225CPZ
available or supported,
recommended replacement:
ICL3225ECAZ
ICL3225IAZ (Note)
ICL3225IAZ-T (Note)
ICL3245CAZ (Note)
ICL3245CAZ-T (Note)
ICL3245IVZ (Note)
No longer
available or supported,
recommended replacement:
ICL3245EIAZ
ICL32 25IAZ
ICL32 25IAZ
ICL 3245CAZ
ICL 3245CAZ
ICL3245 IVZ
-40 to 85
-40 to 85
0 to 70
0 to 70
-40 to 85
20 Ld SSOP (Pb-free)
20 Ld SSOP Tape and Reel (Pb-free)
28 Ld SSOP (Pb-free)
28 Ld SSOP Tape and Reel (Pb-free)
28 Ld TSSOP (Pb-free)
M20.209
M20.209
M28.209
M28.209
M28.173
ICL3245IVZ-T (Note)
No longer
ICL3245 IVZ
available or supported,
recommended replacement:
ICL3245EIAZ
-40 to 85
28 Ld TSSOP Tape and Reel (Pb-free)
M28.173
*Pb-free PDIPs can be used for through hole wave solder processing only. They are not intended for use in Reflow solder processing applications.
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
ICL3225 (PDIP, 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
ICL3245 (SSOP, TSSOP)
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
C1- 4
C2+ 5
C2- 6
V-
7
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
T2
OUT
8
R2
IN
9
R2
OUT
10
FN4878 Rev 9.00
October 5, 2015
Page 2 of 19
ICL3225, ICL3245
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.
RS-232 level (nominally
5.5V)
transmitter outputs.
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).
Typical Operating Circuits
ICL3225
+3.3V
+
0.1F
2
+
4
5
+
6
13
12
15
C1+
C1-
C2+
C2-
19
V
CC
V+
3
+ C
3
0.1F
C
4
0.1F
+
T1
OUT
T2
OUT
R1
IN
RS-232
LEVELS
C
1
0.1F
C
2
0.1F
V- 7
T
1
T
2
17
8
16
R
1
5k
9
R
2
5k
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
FN4878 Rev 9.00
October 5, 2015
Page 3 of 19
ICL3225, ICL3245
Typical Operating Circuits
(Continued)
ICL3245
+3.3V
+
0.1F
C
1
0.1F
C
2
0.1F
+
26
28
24
1
+
2
14
T1
IN
13
12
T3
IN
20
T
2
10
11
T3
OUT
C1+
C1-
C2+
C2-
T
1
V-
V
CC
27
V+
3
+
C
3
0.1F
C
4
0.1F
+
T1
OUT
RS-232
LEVELS
9
T2
IN
T2
OUT
T
3
R2
OUTB
TTL/CMOS
LOGIC LEVELS
19
R1
OUT
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
5k
5k
8
R5
IN
5k
7
R4
IN
5k
6
R3
IN
RS-232
LEVELS
5k
5
R2
IN
4
R1
IN
R2
OUT
V
CC
TO POWER
CONTROL LOGIC
FN4878 Rev 9.00
October 5, 2015
Page 4 of 19
ICL3225, ICL3245
Absolute Maximum Ratings
V
CC
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
T
IN
, FORCEOFF, FORCEON . . . . . . . . . . . . . . . . . . -0.3V to 6V
R
IN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
25V
Output Voltages
T
OUT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13.2V
R
OUT
, INVALID, READY . . . . . . . . . . . . . . . . -0.3V to V
CC
+0.3V
Short Circuit Duration
T
OUT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . See Specification Table
Thermal Information
Thermal Resistance (Typical, Note 1)
JA
(°C/W)
20 Ld PDIP Package* . . . . . . . . . . . . . . . . . . . . . . .
80
20 Ld SSOP Package . . . . . . . . . . . . . . . . . . . . . . .
135
28 Ld SSOP Package . . . . . . . . . . . . . . . . . . . . . . .
100
28 Ld TSSOP Package . . . . . . . . . . . . . . . . . . . . . .
125
Maximum Junction Temperature (Plastic Package) . . . . . . . 150°C
Maximum Storage Temperature Range . . . . . . . . . . -65°C to 150°C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300°C
(SSOP, TSSOP - Lead Tips Only)
*Pb-free PDIPs can be used for through hole wave solder processing
only. They are not intended for use in Reflow solder processing
applications.
Operating Conditions
Temperature Range
ICL32XXC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
ICL32XXI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to 85°C
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:
1.
JA
is measured with the component mounted on a low effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications
Test Conditions: V
CC
= 3V to 5.5V, C
1
- C
4
= 0.1
F; Unless Otherwise Specified.
Typicals are at T
A
= 25°C
TEST CONDITIONS
All R
IN
Open, FORCEON = GND, FORCEOFF = V
CC
FORCEOFF = GND
All Outputs Unloaded,
ICL3245, V
CC
= 3.0V
FORCEON = FORCEOFF = V
CC
ICL322X, V
CC
= 3.15V
T
IN
, FORCEON, FORCEOFF
T
IN
, FORCEON, FORCEOFF
V
CC
= 3.3V
V
CC
= 5.0V
TEMP
(°C)
25
25
25
25
Full
Full
Full
25
T
IN
, FORCEON, FORCEOFF
FORCEOFF = GND
I
OUT
= 1.6mA
I
OUT
= -1.0mA
Full
Full
Full
Full
Full
V
CC
= 3.3V
V
CC
= 5.0V
V
CC
= 3.3V
V
CC
= 5.0V
25
25
25
25
25
25
All Transmitter Outputs Loaded with 3k to Ground
V
CC
= V+ = V- = 0V, Transmitter Output =
2V
Full
Full
Full
MIN
-
-
-
-
-
2.0
2.4
-
-
-
-
TYP
1.0
1.0
0.3
0.3
-
-
-
0.5
0.01
0.05
-
MAX UNITS
10
10
1.0
1.0
0.8
-
-
-
1.0
10
0.4
-
25
-
-
2.4
2.4
-
7
-
-
60
A
A
mA
mA
V
V
V
V
A
A
V
V
V
V
V
V
V
V
k
V
mA
PARAMETER
DC CHARACTERISTICS
Supply Current, Automatic
Powerdown
Supply Current, Powerdown
Supply Current,
Automatic Powerdown Disabled
LOGIC AND TRANSMITTER INPUTS AND RECEIVER OUTPUTS
Input Logic Threshold Low
Input Logic Threshold High
Transmitter Input Hysteresis
Input Leakage Current
Output Leakage Current
Output Voltage Low
Output Voltage High
RECEIVER INPUTS
Input Voltage Range
Input Threshold Low
Input Threshold High
Input Hysteresis
Input Resistance
TRANSMITTER OUTPUTS
Output Voltage Swing
Output Resistance
Output Short-Circuit Current
5.0
300
-
5.4
10M
35
-25
0.6
0.8
-
-
-
3
-
1.2
1.5
1.5
1.8
0.5
5
V
CC
-0.6 V
CC
-0.1
FN4878 Rev 9.00
October 5, 2015
Page 5 of 19
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