intersil ICL3237E DATA SHEET
®
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ICL3237E
Data Sheet July 2004
±15kV ESD Protected, 10nA SupplyCurrent, +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 V
provides
Human Body Model) on transmitter outputs and receiver
inputs (RS-232 pins). Targeted applications are cell phones,
PDAs, P almtops , 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 = V
conditions. The ICL3237E is fully compatible with 3.3V only
systems, mixed 3.3V and 5.0V systems, and 5.0V only
systems.
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.
NOTE:
1. Data rate is selectable via the MBAUD pin.
±15kV ESD protection (IEC61000-4-2 Air Gap and
) are guaranteed at worst case load
CC
PART
NUMBER
ICL3237E 5 3 1 250/1000 YES NO YES NO
NO. OF
Tx.
NO. OF
Rx.
= 3.0V. Additionally, it
CC
TABLE 1. SUMMARY OF FEATURES
NO. OF
MONITOR Rx.
)
(R
OUTB
(NOTE 1)
DATA
RATE
(kbps)
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 Fre e
• 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
• 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
Rx. ENABLE
FUNCTION?
READY
OUTPUT?
MANUAL
POWER-
DOWN?
FN6014.2
AUTOMATIC
POWERDOWN
FUNCTION?
1
Copyright © Intersil Americas Inc. 2002-2004. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
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.
ICL3237E
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Pinout
Ordering Information
TEMP.
PART NUMBER
RANGE (oC) PACKAGE
ICL3237ECA 0 to 70 28 Ld SSOP M28.209
ICL3237ECAZ
(See Note)
0 to 70 28 Ld SSOP
(Pb-free)
ICL3237EIA -40 to 85 28 Ld SSOP M28.209
ICL3237EIAZ
(See Note)
-40 to 85 28 Ld SSOP
(Pb-free)
*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.
PKG. DWG.
#
M28.209
M28.209
C2+
GND
C2-
T1
OUT
T2
OUT
T3
OUT
R1
R2
T4
OUT
R3
T5
OUT
SHDN
ICL3237E (SSOP)
1
2
3
V-
4
5
6
7
8
IN
9
IN
10
11
IN
12
EN
13
14
TOP VIEW
28
27
26
25
24
23
22
21
20
19
18
17
16
15
C1+
V+
V
CC
C1T1
IN
T2
IN
T3
IN
R1
OUT
R2
OUT
T4
IN
R3
OUT
T5
IN
R1
OUTB
MBAUD
Pin Descriptions
PIN FUNCTION
V
CC
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.
T
T
OUT
R
R
OUT
R
OUTB
EN
SHDN
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 V
System power supply input (3.0V to 5.5V).
TTL/CMOS compatible transm it ter I nputs (Note 2).
IN
±15kV ESD Protected, RS-232 level (nominally ±5.5V) transmitter outputs.
±15kV ESD Protected, RS-232 compatible receiver in puts.
IN
TTL/CMOS level receiver outputs.
TTL/CMOS level, noninverting, always enabled receiver output.
Active low receiver enable control; doesn’t disable R
output (Note 2).
OUTB
Active low input to shut down transmitters and on-board power supply, to place device in low power mode (Note 2).
is removed.
CC
2
Typical Operating Circuit
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NOTE 4
TTL/CMOS
LOGIC LEVELS
+3.3V
0.1µF
0.1µF
R1
ICL3237E
ICL3237E
+
0.1µF
28
C
1
C
2
T1
T2
T3
T4
T5
OUTB
IN
IN
IN
IN
IN
C1+
+
25
C1-
1
C2+
+
3
C2-
24
23
22 7
19 10
17 12
16
V
CC
C3 (OPTIONAL CONNECTION, NOTE 3)
V+
V-
+
27
C
3
+
0.1µF
C
0.1µF
+
T1
T2
T3
T4
T5
4
OUT
OUT
OUT
OUT
OUT
NOTE 4
RS-232
LEVELS
4
5
6
26
T
1
T
2
T
3
T
4
T
5
NOTES:
3. THE NEGATIVE TERMINAL OF C
4. FOR V
= 3.15V (3.3V -5%), USE C1 - C4 = 0.1µF OR GREATER. FOR VCC = 3.0V (3.3V -10%), USE C1 - C4 = 0.22µF.
CC
R1
R2
R3
TO CONTROL LOGIC
CAN BE CONNECTED TO EITHER VCC OR GND.
3
21
OUT
R
1
OUT
R
2
OUT
R
3
EN
13
14
V
CC
15
SHDN
MBAUD
GND
8
R1
IN
5kΩ
920
R2
5kΩ
1118
R3
5kΩ
2
RS-232
IN
LEVELS
IN
3
ICL3237E
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Absolute Maximum Ratings Thermal Information
VCC to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V
V+ to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V
V- to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +0.3V to -7V
V+ to V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14V
Input Voltages
, EN, SHDN, MBAUD . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V
T
IN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25V
R
IN
Output Voltages
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±13.2V
T
OUT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to VCC +0.3V
R
OUT
Short Circuit Duration
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
T
OUT
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . See Specification Table
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. θ
is measured with the component mounted on a low effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
JA
Thermal Resistance (Typical, Note 5)
28 Ld SSOP Package . . . . . . . . . . . . . . . . . . . . . . . 100
Moisture Sensitivity (see Technical Brief TB363)
SSOP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Level 1
Maximum Junction Temperature (Plastic Package) . . . . . . . 150
Maximum Storage Temperature Range. . . . . . . . . . -65
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300
(Lead Tips Only)
θ
(oC/W)
JA
o
C to 150oC
Operating Conditions
Temperature Range
ICL3237EC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0
ICL3237EI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40
o
C to 70oC
o
C to 85oC
o
o
C
C
Electrical Specifications Test Conditions: V
Specified. Typicals are at T
PARAMETER TEST CONDITIONS
DC CHARACTERISTICS
Supply Current,
Powerdown Disabled
Supply Current, Powerdown SHDN
LOGIC AND TRANSMITTER INPUTS AND RECEIVER OUTPUTS
Input Logic Threshold Low T
Input Logic Threshold High T
Transmitter Input Hysteresis 25 - 0.5 - V
Input Leakage Current T
Output Leakage Current EN
Output Voltage Low I
Output Voltage High I
RECEIVER INPUTS
Input Voltage Range Full -25 - 25 V
Input Threshold Low V
Input Threshold High V
Input Hysteresis 25 - 0.5 - V
Input Resistance 25 3 5 7 kΩ
TRANSMITTER OUTPUTS
Output Voltage Swing All Transmitter Outputs Loaded with 3kΩ to Ground Full ±5.0 ±5.4 - V
Output Resistance V
Output Short-Circuit Current Full - ±35 ±60 mA
Output Leakage Current V
All Outputs Unloaded, V
= GND 25 - 10 300 nA
, EN, SHDN, MBAUD Full - - 0.8 V
IN
, EN, SHDN,
IN
MBAUD
, EN, SHDN, MBAUD (Note 7) Full - ±0.01 ±1.0 µA
IN
=V
(Receivers Disabled) Full - ±0.05 ±10 µA
CC
= 1.6mA Full - - 0.4 V
OUT
= -1.0mA Full V
OUT
= 3.3V 25 0.6 1.2 - V
CC
V
= 5.0V 25 0.8 1.5 - V
CC
= 3.3V to 5.0V 25 - 1.6 2.4 V
CC
= V+ = V- = 0V, Transmitter Output = ±2V Full 300 10M - Ω
CC
= ±12V, VCC= 0V or 3V to 5.5V, SHDN =GND Full - - ±25 µA
OUT
= 3.15V to 5.5V, C1 - C4 = 0.1µF; VCC = 3V, C1 - C4 = 0.22µF, Unless Otherwise
CC
= 25oC
A
TEMP
o
C) MIN TYP MAX UNITS
(
= 3.15V, SHDN =V
CC
VCC = 3.3V Full 2.0 - - V
V
= 5.0V Full 2.4 - - V
CC
CC
25 - 0.3 1.0 mA
CC
-0.6 V
-0.1 - V
CC
4
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