• Wide Power Supply Range . . . . . . . Single +3V to +5.5V
• Low Supply Current in Powerdown State. . . . . . . . . .10nA
•
Pb-free available
Applications
• Any System Requiring RS-232 Communication Ports
- Battery Powered, Hand-Held, and Portable Equipment
- Laptop Computers, Notebooks, Palmtops
- Modems, Printers and other Peripherals
- Data Cradles and Cables
- Cellular/Mobile Phone
TABLE 1. SUMMARY OF FEATURES
NO. OF
MONITOR Rx.
(R
OUTB
)
1
(NOTE 1)
DATA
RATE
(kbps)
250/1000
MANUAL
POWER-
DOWN?
YES
AUTOMATIC
POWERDOWN
FUNCTION?
NO
PART
NUMBER
ICL3237E
NOTE:
NO. OF NO. OF
Tx.
Rx.
5
3
Rx. ENABLE
FUNCTION?
YES
READY
OUTPUT?
NO
1. Data rate is selectable via the MBAUD pin.
FN6014 Rev 2.00
July 2004
Page 1 of 12
ICL3237E
Pinout
ICL3237E (SSOP)
TOP VIEW
C2+ 1
GND 2
C2-
3
28 C1+
27 V+
26 V
CC
25 C1-
24 T1
IN
23 T2
IN
22 T3
IN
21 R1
OUT
20 R2
OUT
19 T4
IN
18 R3
OUT
17 T5
IN
16 R1
OUTB
15 MBAUD
Ordering Information
TEMP.
PART NUMBER RANGE (
o
C)
ICL3237ECA
ICL3237ECAZ
(See Note)
ICL3237EIA
ICL3237EIAZ
(See Note)
0 to 70
0 to 70
-40 to 85
-40 to 85
PACKAGE
28 Ld SSOP
28 Ld SSOP
(Pb-free)
28 Ld SSOP
28 Ld SSOP
(Pb-free)
PKG. DWG.
#
M28.209
M28.209
M28.209
M28.209
V- 4
T1
OUT
5
T2
OUT
6
T3
OUT
7
R1
IN
8
R2
IN
9
T4
OUT
10
R3
IN
11
T5
OUT
12
EN 13
SHDN 14
*Add “-T” suffix to part number for tape and reel packaging.
NOTE: Intersil Pb-free products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which is 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-020B.
Pin Descriptions
PIN
V
CC
V+
V-
GND
C1+
C1-
C2+
C2-
T
IN
T
OUT
R
IN
R
OUT
R
OUTB
EN
SHDN
MBAUD
NOTE:
2. These input pins incorporate positive feedback resistors. Once the input is driven to a valid logic level, the feedback resistor maintains that logic
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:
5.
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
= 3.15V to 5.5V, C
1
- C
4
= 0.1F; V
CC
= 3V, C
1
- C
4
= 0.22F, Unless Otherwise
Specified. Typicals are at T
A
= 25
o
C
TEST CONDITIONS
All Outputs Unloaded, V
CC
= 3.15V, SHDN = V
CC
SHDN = GND
T
IN
, EN, SHDN, MBAUD
T
IN
, EN, SHDN,
MBAUD
V
CC
= 3.3V
V
CC
= 5.0V
TEMP
(
o
C)
25
25
Full
Full
Full
25
T
IN
, EN, SHDN, MBAUD (Note 7)
EN = V
CC
(Receivers Disabled)
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 to 5.0V
25
25
25
25
25
All Transmitter Outputs Loaded with 3k to Ground
V
CC
= V+ = V- = 0V, Transmitter Output =
2V
V
OUT
=
12V,
V
CC
= 0V or 3V to 5.5V, SHDN = GND
Full
Full
Full
Full
MIN
-
-
-
2.0
2.4
-
-
-
-
TYP
0.3
10
-
-
-
0.5
0.01
0.05
-
MAX
1.0
300
0.8
-
-
-
1.0
10
0.4
-
25
-
-
2.4
-
7
-
-
60
25
UNITS
mA
nA
V
V
V
V
A
A
V
V
V
V
V
V
V
k
V
mA
A
PARAMETER
DC CHARACTERISTICS
Supply Current,
Powerdown Disabled
Supply Current, Powerdown
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
Output Leakage Current
LOGIC AND TRANSMITTER INPUTS AND RECEIVER OUTPUTS
V
CC
-0.6 V
CC
-0.1
-25
0.6
0.8
-
-
3
5.0
300
-
-
-
1.2
1.5
1.6
0.5
5
5.4
10M
35
-
FN6014 Rev 2.00
July 2004
Page 4 of 12
ICL3237E
Electrical Specifications
Test Conditions: V
CC
= 3.15V to 5.5V, C
1
- C
4
= 0.1F; V
CC
= 3V, C
1
- C
4
= 0.22F, Unless Otherwise
Specified. Typicals are at T
A
= 25
o
C
(Continued)
TEST CONDITIONS
R
L
= 3kOne
C
L
= 1000pF
Transmitter Switching
V
CC
= 3V to 4.5V,
C
L
= 250pF
V
CC
= 4.5V to 5.5V,
C
L
= 1000pF
Receiver Propagation Delay
Receiver Input to
Receiver Output,
C
L
= 150pF
Normal Operation
Normal Operation
t
PHL
- t
PLH,
Note 6
MBAUD = GND
MBAUD = V
CC
, V
CC
= 3.0V
Receiver Skew
Transition Region Slew Rate
t
PHL
- t
PLH
, C
L
= 150pF
C
L
= 150pF to 1000pF MBAUD = GND
V
CC
= 3.3V,
R
L
= 3kto 7k
MBAUD = V
CC
Measured From 3V to
C
L
= 150pF to 2500pF MBAUD = GND
-3V or -3V to 3V
Human Body Model
IEC61000-4-2 Air Gap Discharge
IEC61000-4-2 Contact Discharge
All Other Pins
NOTES:
6. Skew is measured at the input switching points (1.4V).
7. These inputs utilize a positive feedback resistor. The input current is negligible when the input is at either supply rail.
