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Intersil Electronic Components Datasheet



ICL3237E

RS-232 Transmitters/Receivers


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ICL3237E pdf
®
Data Sheet
July 2004
ICL3237E
FN6014.2
±15kV ESD Protected, 10nA Supply-
Current, +3V to +5.5V, 250k/1Mbps,
RS-232 Transmitters/Receivers
The Intersil ICL3237E 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. Additionally, it
provides ±15kV ESD protection (IEC61000-4-2 Air Gap and
Human Body Model) on transmitter outputs and receiver
inputs (RS-232 pins). 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 the manual powerdown function, reduce the
standby supply current to a 10nA 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. The ICL3237E is fully compatible with 3.3V only
systems, mixed 3.3V and 5.0V systems, and 5.0V only
systems.
Features
• ESD Protection For RS-232 I/O Pins to ±15kV (IEC61000)
• Pin Compatible Replacement for MAX3237E
• Pin Selectable, Guaranteed Data Rate . . 250kbps/1Mbps
• Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
• RS-232 Compatible with VCC = 2.7V
• Latch-Up Free
• On-Chip Voltage Converters Require Only Four External
Capacitors
• Manual Powerdown Feature
• Flow Through Pinout
• Rx and Tx Hysteresis For Improved Noise Immunity
• Rx Active in Powerdown; Separate Rx Enable Pin
• Guaranteed Minimum Slew Rate . . . . . . . 6V/µs or 24V/µs
• Wide Power Supply Range. . . . . . . . Single +3V to +5.5V
The ICL3237E 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.
• 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
PART
NUMBER
ICL3237E
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
MANUAL
POWER-
DOWN?
YES
AUTOMATIC
POWERDOWN
FUNCTION?
NO
NOTE:
1. Data rate is selectable via the MBAUD pin.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2002-2004. All Rights Reserved All other trademarks mentioned are the property of their respective owners.



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ICL3237E pdf
ICL3237E
Pinout
ICL3237E (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
Ordering Information
TEMP.
PART NUMBER RANGE (oC)
PACKAGE
PKG. DWG.
#
ICL3237ECA
0 to 70 28 Ld SSOP
M28.209
ICL3237ECAZ
(See Note)
0 to 70
28 Ld SSOP
(Pb-free)
M28.209
ICL3237EIA
-40 to 85 28 Ld SSOP
M28.209
ICL3237EIAZ
(See Note)
-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 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 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 (Note 2).
±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 output.
Active low receiver enable control; doesn’t disable ROUTB output (Note 2).
Active low input to shut down transmitters and on-board power supply, to place device in low power mode (Note 2).
MBAUD Input low selects 250kbps data rate, and input high selects 1Mbps data rate (Note 2).
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
level until VCC is removed.
2



Part Number ICL3237E
Description RS-232 Transmitters/Receivers
Maker Intersil - Intersil
Total Page 12 Pages
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