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Intersil Electronic Components Datasheet

ICL3237E Datasheet

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.



Intersil Electronic Components Datasheet

ICL3237E Datasheet

RS-232 Transmitters/Receivers

No Preview Available !

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



Intersil Electronic Components Datasheet

ICL3237E Datasheet

RS-232 Transmitters/Receivers

No Preview Available !

ICL3237E pdf
ICL3237E
Typical Operating Circuit
+3.3V
NOTE 4
C1
0.1µF
C2
0.1µF
+
0.1µF
28
+ C1+
25 C1-
+ 1 C2+
3 C2-
24
T1IN
TTL/CMOS
LOGIC LEVELS
23
T2IN
22
T3IN
19
T4IN
17
T5IN
16
R1OUTB
21
R1OUT
20
R2OUT
18
R3OUT
13 EN
ICL3237E
C3 (OPTIONAL CONNECTION, NOTE 3)
26
VCC
T1
T2
T3
T4
T5
V+
27 + C3
0.1µF
V- 4
5
NOTE 4
C4
+0.1µF
T1OUT
6
T2OUT
7
T3OUT RS-232
LEVELS
10
T4OUT
12
T5OUT
8
R1IN
R1 5k
9
R2IN
RS-232
LEVELS
R2 5k
11
R3IN
R3 5k
VCC
TO CONTROL LOGIC
14
SHDN
15
MBAUD
GND
2
NOTES:
3. THE NEGATIVE TERMINAL OF C3 CAN BE CONNECTED TO EITHER VCC OR GND.
4. FOR VCC = 3.15V (3.3V -5%), USE C1 - C4 = 0.1µF OR GREATER. FOR VCC = 3.0V (3.3V -10%), USE C1 - C4 = 0.22µF.
3




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