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Intersil Electronic Components Datasheet

ICL3237 Datasheet

RS-232 Transmitters/Receivers

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ICL3237
FN6003.3
1 Microamp Supply-Current, +3V to +5.5V,
1Mbps, RS-232 Transmitters/Receivers
The Intersil ICL3237 contains 3.0V to 5.5V powered RS-232
transmitters/receivers which meet ElA/TIA-232 and
V.28/V.24 specifications, even at VCC = 3.0V. Targeted
applications are cell phones, 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 powerdown
function, 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 (MBAUD = VCC) 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 ICL3237 is a 5 driver, 3 receiver device that also
includes a noninverting always-active receiver for “wake-up”
capability.
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.
Features
15kV ESD Protected (Human Body Model)
• Drop in Replacement for MAX3237
• Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
• Latch-Up Free
• On-Chip Voltage Converters Require Only Four External
Capacitors
• Manual Powerdown Features
• Flow Through Pinout
• Receiver Hysteresis For Improved Noise Immunity
• Pin Selectable Data Rate
• Guaranteed Minimum Data Rate . . . . . . . 250kbps/1Mbps
• Guaranteed Minimum Slew Rate . . . . . . . 6V/s or 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 Phone
Related Literature
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
• AN9863 “3V to +5.5V, 250k-1Mbps, RS-232
Transmitters/Receivers”
TABLE 1. SUMMARY OF FEATURES
PART
NUMBER
ICL3237
NO. OF NO. OF
Tx. Rx.
53
NO. OF
MONITOR Rx.
(ROUTB)
1
(NOTE 1)
DATA
RATE
(kbps)
250/1000
Rx. ENABLE
FUNCTION?
YES
READY
OUTPUT?
NO
NOTE:
1. Data rate is selectable via the MBAUD pin.
MANUAL
POWER-
DOWN?
YES
AUTOMATIC
POWERDOWN
FUNCTION?
NO
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2001-2002, 2004-2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.


Intersil Electronic Components Datasheet

ICL3237 Datasheet

RS-232 Transmitters/Receivers

No Preview Available !

Pinout
ICL3237 (SSOP)
TOP VIEW
C2+ 1
GND 2
C2- 3
V- 4
T1OUT 5
T2OUT 6
T3OUT 7
R1IN 8
R2IN 9
T4OUT 10
R3IN 11
T5OUT 12
EN 13
SHDN 14
28 C1+
27 V+
26 VCC
25 C1-
24 T1IN
23 T2IN
22 T3IN
21 R1OUT
20 R2OUT
19 T4IN
18 R3OUT
17 T5IN
16 R1OUTB
15 MBAUD
ICL3237
Ordering Information
PART NO.
ICL3237CA
PART
MARKING
ICL3237CA
TEMP.
RANGE
(°C)
PACKAGE
PKG.
DWG. #
0 to 70 28 Ld SSOP M28.209
ICL3237CAZ ICL3237CAZ 0 to 70 28 Ld SSOP M28.209
(See Note)
(Pb-free)
ICL3237IA ICL3237IA -40 to 85 28 Ld SSOP M28.209
ICL3237IAZ ICL3237IAZ -40 to 85 28 Ld SSOP M28.209
(See Note)
(Pb-free)
*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
TOUT
RIN
ROUT
ROUTB
EN
SHDN
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 Output.
Active Low Receiver Enable Control; doesn’t disable ROUTB output.
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.
2


Part Number ICL3237
Description RS-232 Transmitters/Receivers
Maker Intersil
Total Page 11 Pages
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