DATASHEET
ICL3225E, ICL3227E, ICL3245E
±15kV ESD Protected, +3V to +5.5V, 1µA, 1Mbps, RS-232 Transceivers with
Enhanced Automatic Powerdown
The Intersil
ICL3225E, ICL3227E,
and
ICL3245E
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. 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 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 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 ICL3245E 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 datasheet, while Application Note
AN9863
summarizes
the features of each device comprising the ICL32xxE 3V family.
FN4900
Rev 12.00
December 12, 2016
Features
• Pb-free (RoHS compliant)
• ESD protection for RS-232 I/O pins to ±15kV (IEC61000)
• Manual and enhanced automatic powerdown features
• Drop in replacements for MAX3225E, MAX3227E,
MAX3245E
• 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
• Guaranteed mouse driveability (ICL3245E)
• “Ready to Transmit” indicator output (ICL3225E/ICL3227E)
• 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/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
-
ICL3225E, ICL3227E,
and
ICL3245E
product pages
TABLE 1. SUMMARY OF FEATURES
ENHANCED
AUTOMATIC
POWERDOWN
FUNCTION?
Yes
Yes
Yes
PART NUMBER
ICL3225E
ICL3227E
ICL3245E
NO. OF
Tx.
2
1
3
NO. OF
Rx.
2
1
5
NO. OF MONITOR
Rx. (R
OUTB
)
0
0
1
DATA RATE
(kbps)
1000
1000
1000
Rx. ENABLE
FUNCTION?
No
No
No
READY
OUTPUT?
Yes
Yes
No
MANUAL
POWER-DOWN?
Yes
Yes
Yes
FN4900 Rev 12.00
December 12, 2016
Page 1 of 22
ICL3225E, ICL3227E, ICL3245E
Ordering Information
PART NUMBER
(Notes
1, 2, 4)
ICL3225ECAZ
PART
MARKING
ICL3225ECAZ
TEMP RANGE
(°C)
0 to +70
0 to +70
-40 to +85
0 to +70
-40 to +85
0 to +70
0 to +70
0 to +70
-40 to +85
PACKAGE
(RoHS COMPLIANT)
20 Ld SSOP
20 Ld PDIP
20 Ld SSOP
16 Ld SSOP
16 Ld SSOP
28 Ld SSOP
28 Ld SOIC
28 Ld TSSOP
28 Ld SSOP
PKG. DWG. #
M20.209
E20.3
M20.209
M16.209
M16.209
M28.209
M28.3
M28.173
M28.209
ICL3225ECPZ (No longer available, recommended 3225ECPZ
replacement: ICL3225ECAZ) (Note
3)
ICL3225EIAZ
ICL3227ECAZA
ICL3227EIAZA
ICL3245ECAZ
ICL3225EIAZ
3227ECAZ
3227EIAZ
ICL3245ECAZ
ICL3245ECBZ (No longer available, recommended ICL3245ECBZ
replacement: ICL3245EIAZ)
ICL3245ECVZ (No longer available, recommended ICL3245ECVZ
replacement: ICL3245EIAZ)
ICL3245EIAZ
NOTES:
ICL3245EIAZ
1. Add “-T” suffix for 1k unit tape and reel option. Refer to
TB347
for details on reel specifications.
2. These Intersil 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). 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.
3. Pb-free PDIPs can be used for through hole wave solder processing only. They are not intended for use in Reflow solder processing applications.
4. For Moisture Sensitivity Level (MSL), see product information page for
ICL3225E, ICL3227E, ICL3245E.
For more information on MSL, see tech brief
TB363.
Pin Configurations
ICL3225E (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
READY 1
C1+ 2
V+
3
ICL3227E (SSOP)
TOP VIEW
16 FORCEOFF
15 V
CC
14 GND
13 T1
OUT
12 FORCEON
11 T1
IN
10 INVALID
9 R1
OUT
C1- 4
C2+ 5
C2- 6
V- 7
T2
OUT
8
R2
IN
9
R2
OUT
10
C1- 4
C2+ 5
C2- 6
V- 7
R1
IN
8
FN4900 Rev 12.00
December 12, 2016
Page 2 of 22
ICL3225E, ICL3227E, ICL3245E
Pin Configurations
(Continued)
ICL3245E (SOIC, 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
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
Pin Descriptions
PIN
V
CC
V+
V-
GND
C1+
C1-
C2+
C2-
T
IN
T
OUT
R
IN
R
OUT
R
OUTB
INVALID
READY
FORCEOFF
FORCEON
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.
±15kV ESD protected, RS-232 level (nominally ±5.5V) transmitter outputs.
±15kV ESD protected, 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).
Active low to shut down transmitters and on-chip power supply. This overrides any automatic circuitry and FORCEON (see
Table 2 on
page 10).
Active high input to override automatic powerdown circuitry, thereby keeping transmitters active. (FORCEOFF must be high).
FUNCTION
FN4900 Rev 12.00
December 12, 2016
Page 3 of 22
Analog electronics
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