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ICL3225E, ICL3227E, ICL3245E
Data Sheet
February 27, 2006
FN4900.9
±15kV
ESD Protected, +3V to +5.5V,
1Microamp, 1Mbps, RS-232 Transceivers
with Enhanced Automatic Powerdown
The Intersil ICL32XXE 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 data sheet, while Application Note AN9863
summarizes the features of each device comprising the
ICL32XXE 3V family.
Features
• Pb-Free Plus Anneal Available (RoHS Compliant)
(see Ordering Info)
• 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
TABLE 1. SUMMARY OF FEATURES
NO. OF
MONITOR Rx.
(R
OUTB
)
0
0
1
DATA
RATE
(kbps)
1000
1000
1000
MANUAL
POWER-
DOWN?
Yes
Yes
Yes
ENHANCED
AUTOMATIC
POWERDOWN
FUNCTION?
Yes
Yes
Yes
NO. OF NO. OF
PART NUMBER
Tx.
Rx.
ICL3225E
ICL3227E
ICL3245E
2
1
3
2
1
5
Rx. ENABLE
FUNCTION?
No
No
No
READY
OUTPUT?
Yes
Yes
No
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or1-888-468-3774
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2000, 2001, 2003-2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
ICL3225E, ICL3227E, ICL3245E
Ordering Information
PART NO. *
ICL3225ECA
ICL3225ECAZ
(Note 1)
ICL3225ECP
ICL3225ECPZ
(Note 1)
ICL3225EIA
ICL3225EIAZ
(Note 1)
ICL3227ECA
PART
MARKING
ICL3225ECA
ICL3225ECAZ
ICL3225ECP
3225ECPZ
ICL3225EIA
ICL3225EIAZ
ICL3227ECA
TEMP.
RANGE
(°C)
0 to 70
0 to 70
0 to 70
0 to 70
PACKAGE
20 Ld SSOP
20 Ld SSOP
(Pb-free)
20 Ld PDIP
20 Ld PDIP**
(Pb-free)
PKG.
DWG. #
M20.209
M20.209
E20.3
E20.3
M20.209
M20.209
M16.209
M16.209
M16.209
M16.209
M28.209
M28.209
M28.3
Ordering Information
PART NO. *
ICL3245ECBZ
(Note 1)
ICL3245ECV
ICL3245ECVZ
(Note 1)
ICL3245EIA
ICL3245EIAZ
(Note 1)
ICL3245EIB
PART
MARKING
ICL3245ECBZ
ICL3245ECV
ICL3245ECVZ
ICL3245EIA
ICL3245EIAZ
ICL3245EIB
(Continued)
TEMP.
RANGE
(°C)
0 to 70
0 to 70
0 to 70
PKG.
DWG. #
M28.3
PACKAGE
28 Ld SOIC
(Pb-free)
28 Ld TSSOP M28.173
28 Ld TSSOP M28.173
(Pb-free)
M28.209
M28.209
M28.3
-40 to 85 28 Ld SSOP
-40 to 85 28 Ld SSOP
(Pb-free)
-40 to 85 28 Ld SOIC
-40 to 85 20 Ld SSOP
-40 to 85 20 Ld SSOP
(Pb-free)
0 to 70
0 to 70
16 Ld SSOP
16 Ld SSOP
(Pb-free)
ICL3227ECAZA 3227ECAZ
(Note 1)
ICL3227EIA
ICL3227EIA
-40 to 85 16 Ld SSOP
-40 to 85 16 Ld SSOP
(Pb-free)
0 to 70
0 to 70
0 to 70
28 Ld SSOP
28 Ld SSOP
(Pb-Free)
28 Ld SOIC
* Most surface mount devices are available on tape and reel; add “-T” to
suffix.
**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:
ICL3227EIAZA 3227EIAZ
(Note 1)
ICL3245ECA
ICL3245ECAZ
(Note 1)
ICL3245ECB
ICL3245ECA
ICL3245ECAZ
ICL3245ECB
1. 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
ICL3225E (PDIP, SSOP)
TOP VIEW
READY
1
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
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+ 2
V+
3
C1+ 2
V+
3
C1- 4
C2+ 5
C2- 6
V-
7
C1- 4
C2+ 5
C2- 6
V-
7
T2
OUT
8
R2
IN
9
R2
OUT
10
R1
IN
8
2
FN4900.9
February 27, 2006
ICL3225E, ICL3227E, ICL3245E
Pinouts
(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
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).
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).
3
FN4900.9
February 27, 2006
ICL3225E, ICL3227E, ICL3245E
Typical Operating Circuits
ICL3225E
+3.3V
+
0.1µF
2
+
4
5
+
6
13
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
T1
IN
T2
IN
TTL/CMOS
LOGIC LEVELS
R1
OUT
12
8
15
R
1
5kΩ
16
R2
OUT
10
R
2
1
READY
14
FORCEON
GND
18
FORCEOFF
INVALID
5kΩ
9
R2
IN
20
11
V
CC
TO POWER
CONTROL LOGIC
ICL3227E
+3.3V
+
0.1µF
C
1
0.1µF
C
2
0.1µF
2
+ C1+
4
C1-
5
+ C2+
6
C2-
11
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
T1
IN
TTL/CMOS
LOGIC LEVELS
R1
OUT
9
R
1
1
READY
FORCEOFF
12
FORCEON
GND
14
INVALID
5kΩ
8
16
10
V
CC
TO POWER
CONTROL LOGIC
4
FN4900.9
February 27, 2006
嵌入式系统
