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MAX3380E Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. MAX3380E
Description  2.35V to 5.5V, 1μA, 2Tx/2Rx RS-232 Transceivers with ±15kV ESD-Protected I/O and Logic Pins
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX3380E Datasheet(HTML) 1 Page - Maxim Integrated Products

 
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General Description
The MAX3380E/MAX3381E are +2.35V to +5.5V-pow-
ered EIA/TIA-232 and V.28/V.24 communication inter-
faces with low power requirements, high data-rate
capabilities, and enhanced electrostatic discharge
(ESD) protection on both the TTL and RS-232 sides.
The MAX3380E/MAX3381E have two receivers and two
transmitters. All RS-232 inputs, outputs, and logic input
pins are protected to ±15kV using IEC 1000-4-2 Air-
Gap Discharge method and the Human Body Model,
and ±8kV using IEC 1000-4-2 Contact Discharge
method.
The proprietary low-dropout transmitter output stage
enables true RS-232 performance from a +3.1V to
+5.5V supply with a dual charge pump. The parts
reduce the transmitter output levels to RS-232-compati-
ble levels with no increase in supply current for sup-
plies less than +3.1V and greater than +2.35V. The
+2.35V to +5.5V operating range is fully compatible
with lithium-ion (Li+) batteries. The charge pump
requires only four small 0.1µF capacitors for operation.
The MAX3380E/MAX3381E transceivers use Maxim’s
revolutionary AutoShutdown Plus™ feature to auto-
matically enter a 1µA shutdown mode. These
devices shut down the on-board power supply and
drivers when they do not sense a valid signal transi-
tion for 30 seconds on either the receiver or trans-
mitter inputs.
The MAX3380E is capable of transmitting data at
rates of 460kbps while maintaining RS-232 output
levels, and the MAX3381E operates at data rates up
to 250kbps. The MAX3381E offers a slower slew rate
for applications where noise and EMI are issues. The
MAX3380E/MAX3381E have a unique VL pin that
allows interoperation in mixed-logic voltage systems
down to +1.65V. Both input and output logic levels
are referenced to the VL pin. The MAX3380E/MAX3381E
are available in a space-saving TSSOP package.
Applications
Cell Phone Data Lump Cables
PDA Data Lump Cables
GPS Receivers
Digital Cameras
Features
o ±15kV ESD Protection on All CMOS and RS-232
Inputs and Outputs (Except INVALID)
±15kV Human Body Model
±15kV IEC 1000-4-2 Air-Gap Discharge
±8kV IEC 1000-4-2 Contact Discharge
o Operates Over Entire Li+ Battery Range
o Low Logic Threshold Down to +1.65V for
Compatibility with Cell Phone Logic Supply Voltages
o 1µA Low-Power AutoShutdown Plus Mode
o Compatible with Next-Generation GSM Data Rates
o 20-Pin TSSOP Package
+2.35V to +5.5V, 1µA, 2Tx/2Rx RS-232 Transceivers
with ±15kV ESD-Protected I/O and Logic Pins
________________________________________________________________ Maxim Integrated Products
1
19-2128; Rev 0; 8/01
Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
MAX3380ECUP
0
°C to +70°C
20 TSSOP
MAX3380EEUP
-40
°C to +85°C
20 TSSOP
MAX3381ECUP
0
°C to +70°C
20 TSSOP
MAX3381EEUP
-40
°C to +85°C
20 TSSOP
Pin Configuration appears at end of data sheet.
MAX3380E/
MAX3381E
R2OUT
R1OUT
R2IN
GND
RS-232
OUTPUTS
TTL/CMOS
INPUTS
T2IN
T1IN
C2-
C2+
C1-
C1+
R1IN
T2OUT
T1OUT
V-
V+
VCC
VL
C1
0.1
µF
C2
0.1
µF
C5
0.1
µF
+3.3V
RS-232
INPUTS
TTL/CMOS
OUTPUTS
5k
5k
C3
0.1
µF
C4
0.1
µF
VL
VL
Typical Operating Circuit
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
AutoShutdown Plus is a trademark of Maxim Integrated Products


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