2
Pinout
ICL3237 (SSOP)
TOP VIEW
C2+
GND
C2-
V-
T1OUT
T2OUT
T3OUT
R1IN
R2IN
R3IN
T5OUT
EN
SHDN
C1+
VCC
C1-
T1IN
T2IN
R1OUT
T4IN
R3OUT
T5IN
R1OUTB
MBAUD
V+
T3IN
R2OUT
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
T4OUT
Ordering Information
PART NO.
PART
MARKING
TEMP.
RANGE
(°C)
PACKAGE
PKG.
DWG. #
ICL3237CA
0 to 70
28 Ld SSOP
M28.209
ICL3237CAZ
(See Note)
ICL3237CAZ
0 to 70
28 Ld SSOP
(Pb-free)
M28.209
ICL3237IA
-40 to 85 28 Ld SSOP
M28.209
ICL3237IAZ
(See Note)
ICL3237IAZ
-40 to 85 28 Ld SSOP
(Pb-free)
M28.209
*Add “-T” suffix to part number for tape and reel packaging.
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.
Pin Descriptions
PIN
FUNCTION
VCC
System Power Supply Input (3.0V to 5.5V).
V+
Internally Generated Positive Transmitter Supply (+5.5V).
V-
Internally Generated Negative Transmitter Supply (-5.5V).
GND
Ground Connection.
C1+
External Capacitor (Voltage Doubler) is connected to this lead.
C1-
External Capacitor (Voltage Doubler) is connected to this lead.
C2+
External Capacitor (Voltage Inverter) is connected to this lead.
C2-
External Capacitor (Voltage Inverter) is connected to this lead.
TIN
TTL/CMOS Compatible Transmitter Inputs.
TOUT
RS-232 level (nominally
±5.5V) transmitter outputs.
RIN
RS-232 Compatible Receiver Inputs.
ROUT
TTL/CMOS Level Receiver Outputs.
ROUTB
TTL/CMOS Level, Noninverting, Always Enabled Receiver Output.
EN
Active Low Receiver Enable Control; doesn’t disable ROUTB output.
SHDN
Active Low Input to Shutdown Transmitters and On-Board Power Supply, to place device in low power mode.
MBAUD
Input Low selects 250kbps data rate, and input high selects 1Mbps data rate.
ICL3237