19-1529; Rev 3; 4/01
3.0V, ±25kV ESD-Protected RS-232
Transceiver for PDAs and Cell Phones
The MAX3386E 3V-powered EIA/TIA-232 and V.28/V.24
is a communications interface with low power requirements, high data-rate capabilities, and enhanced electrostatic discharge (ESD) protection. The MAX3386E
has two receivers and three transmitters. All RS-232
inputs and outputs are protected to ±25kV 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 MAX3386E is capable of
running at data rates up to 250kbps while maintaining
RS-232 compliant output levels.
The MAX3386E has a unique VL pin that allows interoperation in mixed-logic voltage systems. Both input and
output logic levels are pin programmable through the
VL pin. The MAX3386E is available in a space-saving
TSSOP package.
o VL Pin for Compatibility with Mixed-Voltage
Systems
o Enhanced ESD Protection on Rx Inputs and Tx
Outputs
±15kV—Human Body Model
±25kV—IEC 1000-4-2, Air-Gap Discharge
±8kV—IEC 1000-4-2, Contact Discharge
o Low 300µA Supply Current
o Guaranteed 250kbps Data Rate
o 1µA Low-Power Shutdown
o Meets EIA/TIA-232 Specifications Down to 3.0V
Ordering Information
PART
TEMP. RANGE
0°C to +70°C
20 TSSOP
MAX3386EEUP
-40°C to +85°C
20 TSSOP
Typical Operating Circuit
Applications
Subnotebook/Palmtop Computers
PDAs and PDA Cradles
PIN-PACKAGE
MAX3386ECUP
+3.3V
Cell Phone Data Cables
Battery-Powered Equipment
20
CBYPASS
C1
0.1µF
Hand-Held Equipment
Peripherals
1 C1+
3
4
Pin Configuration
C2
0.1µF
5
SHDN
12
19
VCC
VL
V+
2
C3
0.1µF
C1-
MAX3386E
C2+
V-
6
C2-
7 T1IN
T1OUT 17
8 T2IN
T2OUT 16
9 T3IN
C4
0.1µF
T3OUT 15
TOP VIEW
C1+ 1
20 SHDN
V+ 2
19 VCC
C1- 3
TTL/CMOS
INPUTS
18 GND
C2+ 4
C2- 5
17 T1OUT
MAX3386E
V- 6
VL
T1IN 7
14 R1IN
T2IN 8
TTL/CMOS
OUTPUTS
5kΩ
VL
13 R2IN
T3IN 9
R1IN 14
11 R1OUT
16 T2OUT
15 T3OUT
12 VL
10 R2OUT
R2OUT 10
11 R1OUT
RS-232
OUTPUTS
RS-232
INPUTS
R2IN 13
5kΩ
GND
18
TSSOP
________________________________________________________________ Maxim Integrated Products
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.
1
MAX3386E
Features
General Description
