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| MAX3387E_10 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – 3V, ±15kV ESD-Protected, AutoShutdown Plus RS-232 Transceiver for PDAs and Cell Phones | |||
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19-1561; Rev 3; 6/10
3V, ±15kV ESD-Protected, AutoShutdown Plus
RS-232 Transceiver for PDAs and Cell Phones
General Description
The MAX3387E 3V powered TIA/EIA-232 and V.28/V.24
is a communications interface with low power require-
ments, high data-rate capabilities, and enhanced elec-
trostatic discharge (ESD) protection. The MAX3387E
has three 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.
A proprietary low-dropout transmitter output stage
enables true RS-232 performance from a +3.0V to
+5.5V supply with a dual charge pump. The charge
pump requires only four small 0.1µF capacitors for
operation from a +3.3V supply. The MAX3387E is capa-
ble of running at data rates up to 250kbps while main-
taining RS-232 compliant output levels.
The MAX3387E has a unique VL pin that allows interop-
eration in mixed-logic voltage systems. Both input and
output logic levels are pin programmable through the
VL pin. The MAX3387E is available in a space-saving
TSSOP package.
Applications
Subnotebook/Palmtop Computers
PDAs and PDA Cradles
Cell Phone Data Cables
Battery-Powered Equipment
Hand-Held Equipment
Peripherals
Features
⦠VL Pin for Compatibility with Mixed-Voltage
Systems
⦠±15kV ESD Protection on Rx Inputs and Tx Outputs
⦠Low 300µA Supply Current
⦠Guaranteed 250kbps Data Rate
⦠1µA AutoShutdown Plus⢠with Receivers Active
⦠Meets TIA/EIA-232 Specifications Down to 3.0V
Ordering Information
PART
TEMP. RANGE PIN-PACKAGE
MAX3387ECUG+
0°C to +70°C
24 TSSOP
MAX3387EEUG+ -40°C to +85°C 24 TSSOP
+Denotes a lead(Pb)-free/RoHS-compliant package.
Typical Operating Circuit
+3.3V
CBYPASS
C1
0.1μF
C2
0.1μF
24
23
FORCEOFF
1 C1+
VCC
3 C1-
4 C2+
MAX3387E
5 C2-
15
VL
2
V+
6
V-
7 T1IN
T1OUT 21
TTL/CMOS
INPUTS
8 T2IN
10 T3IN
14 R1OUT
T2OUT 20
T3OUT 19
VL
R1IN 18
TTL/CMOS
OUTPUTS
13 R2OUT
12 R3OUT
5k
VL
R2IN 17
5k
VL
R3IN 16
9 INVALID
5k
FORCEON GND
11
22
C3
0.1μF
C4
0.1μF
RS-232
OUTPUTS
RS-232
INPUTS
AutoShutdown Plus is a trademark of Maxim Integrated Products.
_______________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maximâs website at www.maxim-ic.com.
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