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MAX3388E Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. MAX3388E
Description  2.5V, ±15kV ESD-Protected RS-232 Transceivers for PDAs and Cell Phones
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX3388E Datasheet(HTML) 1 Page - Maxim Integrated Products

 
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General Description
The MAX3388E/MAX3389E are 2.5V-powered EIA/TIA-
232 and V.28/V.24 communications interfaces with low
power requirements, high data-rate capabilities, and
enhanced electrostatic discharge (ESD) protection. The
MAX3388E/MAX3389E have two receivers and three
transmitters. All RS-232 inputs and outputs are protected
to ±15kV using the IEC 1000-4-2 Air-Gap Discharge
method, ±8kV using the IEC 1000-4-2 Contact Discharge
method, and ±15kV using the Human Body Model.
In addition to the traditional RS-232 I/O, these devices have
dedicated logic-level I/O pins for additional device-to-
device handshaking. During shutdown the logic-level I/O
pins are active for the MAX3389E. An internal 62
Ω switch is
provided to switch power to external circuitry or modules.
A proprietary low-dropout transmitter output stage
enables RS-232 compatible performance from a +2.35V
to +3.0V supply with a dual charge pump. The charge
pump requires only four small 0.1µF capacitors for oper-
ation from a +2.5V supply. The MAX3388E/MAX3389E
are capable of running at data rates up to 460kbps while
maintaining RS-232-compatible output levels.
The MAX3388E/MAX3389E have a unique VL pin that
allows interoperation in mixed-logic voltage systems.
Both input and output logic levels are pin programma-
ble through the VL pin. The MAX3388E/MAX3389E are
available in a space-saving TSSOP package.
Features
o VL Pin for Compatibility with Mixed-Voltage
Systems
o Additional I/O for Hot-Sync Applications
o ±15kV ESD Protection on Rx Inputs, Tx Outputs,
LIN, and SWIN
o Low 300µA Supply Current
o Guaranteed 460kbps Data Rate
o 1µA Low-Power Shutdown
o Integrated Switch for Powering Remote Circuitry
o Flow-Through Pinout
o LOUT Active During Shutdown (MAX3389E)
Applications
Subnotebook/Palmtop Computers
PDAs and PDA Cradles
Cell Phone Data Cables
Battery-Powered Equipment
Hand-Held Equipment
Peripherals
2.5V, ±15kV ESD-Protected RS-232
Transceivers for PDAs and Cell Phones
________________________________________________________________ Maxim Integrated Products
1
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
SHDN
VCC
GND
T1OUT
C2+
C1-
V+
C1+
TOP VIEW
T2OUT
T3OUT
R1IN
R2IN
T2IN
T1IN
V-
C2-
16
15
14
13
9
10
11
12
LIN
SWIN
VL
R1OUT
R2OUT
SWOUT
LOUT
T3IN
TSSOP
MAX3388E
MAX3389E
Typical Operating Circuit
19-1845; Rev 1; 9/01
Pin Configuration
Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
MAX3388ECUG
0°C to +70°C
24 TSSOP
MAX3388EEUG
-40°C to +85°C
24 TSSOP
MAX3389ECUG
0°C to +70°C
24 TSSOP
MAX3389EEUG
-40°C to +85°C
24 TSSOP
MAX3388E
MAX3389E
R2OUT
12
R1OUT
VL
13
R2IN
17
GND
22
RS-232
I/O
T2IN
8
T1IN
7
C2-
5
C2+
4
C1-
3
C1+
1
R1IN
18
T2OUT
20
T1OUT
21
V-
6
V+
2
VCC
VL
14
23
C1
0.1
µF
C2
0.1
µF
CBYPASS
+2.5V
T3IN
9
T3OUT
19
5k
5k
C3
0.1
µF
C4
0.1
µF
VL
24
SHDN
SWIN 15
16
LIN
30k
11
SWOUT
SHDN
10 LOUT
=
±15kV ESD PROTECTION
Covered by U.S Patent numbers 4,636,930; 4,679,134;
4,777,577; 4,797,899; 4,809,152; 4,897,774; 4,999,761.
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.


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