MAX3387 Maxim, MAX3387 Datasheet
MAX3387
Manufacturer Part Number
MAX3387
Description
3V / 15kV ESD-Protected / AutoShutdown Plus RS-232 Transceiver for PDAs and Cell Phones
Manufacturer
Maxim
Datasheet
1.MAX3387.pdf
(16 pages)
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The MAX3387E 3V powered EIA/TIA-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 V
eration in mixed-logic voltage systems. Both input and
output logic levels are pin programmable through the
V
TSSOP package.
19-1561; Rev 1; 10/99
AutoShutdown Plus is a trademark of Maxim Integrated Products.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
L
Subnotebook/Palmtop Computers
PDAs and PDA Cradles
Cell Phone Data Cables
Battery-Powered Equipment
Hand-Held Equipment
Peripherals
pin. The MAX3387E is available in a space-saving
3V, ±15kV ESD-Protected, AutoShutdown Plus
TOP VIEW
RS-232 Transceiver for PDAs and Cell Phones
FORCEON
INVALID
R3OUT
T1IN
T2IN
T3IN
C1+
C2+
C1-
C2-
V+
V-
________________________________________________________________ Maxim Integrated Products
10
11
12
1
2
3
4
5
6
7
8
9
General Description
MAX3387E
TSSOP
Pin Configuration
L
pin that allows interop-
24
23
22
21
20
19
18
17
16
15
14
13
Applications
FORCEOFF
V
GND
T1OUT
T2OUT
T3OUT
R1IN
R2IN
R3IN
V
R1OUT
R2OUT
CC
L
MAX3387ECUG
MAX3387EEUG
TTL/CMOS
V
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 EIA/TIA-232 Specifications Down to 3.0V
TTL/CMOS
OUTPUTS
C
L
INPUTS
BYPASS
0.1 F
0.1 F
Pin for Compatibility with Mixed-Voltage
PART
C1
C2
+3.3V
12
10
14
13
9
1
3
4
5
7
8
Typical Operating Circuit
T1IN
C1+
C1-
C2-
T2IN
T3IN
R3OUT
INVALID
C2+
R2OUT
R1OUT
FORCEOFF
FORCEON
24
-40°C to +85°C
11
TEMP. RANGE
0°C to +70°C
Ordering Information
MAX3387E
23
GND
V
CC
V
22
V
V
L
L
L
15
V
T1OUT 21
T2OUT 20
T3OUT 19
L
R3IN 16
5k
5k
5k
R1IN 18
R2IN 17
V+
V-
PIN-PACKAGE
24 TSSOP
24 TSSOP
2
6
Features
C3
0.1 F
C4
0.1 F
RS-232
OUTPUTS
RS-232
INPUTS
1
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