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PDF ICL3237E Data sheet ( Hoja de datos )
| Número de pieza | ICL3237E | |
| Descripción | RS-232 Transmitters/Receivers | |
| Fabricantes | Intersil | |
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®
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.
1 page  
ICL3237E
Electrical Specifications
Test Conditions: VCC = 3.15V
Specified. Typicals are at TA =
t2o55o.C5V(,CCo1nt-inCu4e=d0) .1µF;
VCC
=
3V,
C1
-
C4
=
0.22µF,
Unless
Otherwise
PARAMETER
TEST CONDITIONS
TEMP
(oC) MIN
TYP MAX UNITS
TIMING CHARACTERISTICS
Maximum Data Rate
Receiver Propagation Delay
Receiver Output Enable Time
RL = 3kΩ, One
Transmitter Switching
CL = 1000pF
VCC = 3V to 4.5V,
CL = 250pF
VCC = 4.5V to 5.5V,
CL = 1000pF
Receiver Input to
Receiver Output,
CL = 150pF
tPHL
tPLH
Normal Operation
MBAUD = GND Full
MBAUD = VCC Full
MBAUD = VCC Full
25
25
25
250
1000
1000
-
-
-
700
1700
1100
0.15
0.15
200
- kbps
- kbps
- kbps
- µs
- µs
- ns
Receiver Output Disable Time Normal Operation
25 -
200 - ns
Transmitter Skew
Receiver Skew
Transition Region Slew Rate
tPHL - tPLH, Note 6 MBAUD = GND
MBAUD = VCC, VCC = 3.0V
tPHL - tPLH, CL = 150pF
VCC = 3.3V,
RL = 3kΩ to 7kΩ,
Measured From 3V to
-3V or -3V to 3V
CL = 150pF to 1000pF
CL = 150pF to 2500pF
MBAUD = GND
MBAUD = VCC
MBAUD = GND
25
25
25
25
25
25
-
-
-
6
24
4
100 ns
25 ns
50 - ns
17 30 V/µs
40 150 V/µs
12 30 V/µs
ESD PERFORMANCE
RS-232 Pins (TOUT, RIN)
Human Body Model
IEC61000-4-2 Air Gap Discharge
25 -
25 -
±15 - kV
±15 - kV
IEC61000-4-2 Contact Discharge
25 -
±8 - kV
All Other Pins
Human Body Model
25 -
±2.5 - kV
NOTES:
6. Skew is measured at the input switching points (1.4V).
7. These inputs utilize a positive feedback resistor. The input current is negligible when the input is at either supply rail.
5
5 Page 
ICL3237E
Typical Performance Curves VCC = 3.3V, TA = 25oC (Continued)
3.5
NO LOAD
ALL OUTPUTS STATIC
3.0
2.5
2.0
1.5
1.0
0.5
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
SUPPLY VOLTAGE (V)
FIGURE 14. SUPPLY CURRENT vs SUPPLY VOLTAGE
Die Characteristics
SUBSTRATE POTENTIAL (POWERED UP):
GND
TRANSISTOR COUNT:
619
PROCES
Si Gate CMOS
11
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