MAX3323E Maxim Integrated Products, MAX3323E Datasheet
MAX3323E
Manufacturer Part Number
MAX3323E
Description
(MAX3322E / MAX3323E) RS-232 Transceivers
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX3323E.pdf
(13 pages)
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www.DataSheet4U.com
The MAX3322E/MAX3323E 3.0V to 5.5V powered
EIA/TIA-232 and V.28/V.24 communications interfaces
are designed for multidrop applications with low power
requirements, high data-rate capabilities, and
enhanced electrostatic discharge (ESD) protection. 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.
The MAX3322E/MAX3323E have pin-selectable
5kΩ/high-impedance RS-232 receivers. These devices
are capable of receiving data in high-impedance mode.
In multidrop applications, one receiver has a 5kΩ input
resistance, while the other receivers are high imped-
ance to ensure the RS-232 standard is observed. Logic
control permits selection of the functional mode: high
impedance or RS-232 standard load. The transmitters
are enabled by logic control to allow the multiplexing of
the inputs to a single UART.
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 MAX3322E/MAX3323E are
capable of running at data rates up to 250kbps while
maintaining RS-232-compliant output levels. The
MAX3322E/MAX3323E have a unique V
operation in mixed-logic voltage systems. Both input
and output logic levels are pin programmable through
the V
The MAX3322E is a 2Tx/2Rx device for hardware hand-
shaking in standard RS-232 mode, and the MAX3323E
is a 1Tx/1Rx, required in most multidrop applications.
The MAX3322E is offered in a space-saving TSSOP
package. The MAX3323E is offered in 16-pin DIP and
space-saving TSSOP packages.
19-2667; Rev 1; 1/03
Typical Operating Circuit and Functional Diagram appear
at end of data sheet.
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.
±15kV ESD-Protected, RS-232 Transceivers for
L
Bar-Code Scanners
Video Security
Industrial Data Acquisition
Data Splitters
pin.
________________________________________________________________ Maxim Integrated Products
General Description
Applications
L
pin that allows
o Pin-Selectable 5kΩ/High-Impedance Receivers
o Transmitter Outputs Three-Stated by Logic
o V
o 1Tx/1Rx (MAX3323E) or 2Tx/2Rx (MAX3322E)
o 250kbps Data Rate
o 1µA Low-Power Shutdown
o High ESD Protection for RS-232 I/O Pins
Multidrop Applications
MAX3322E EUP
MAX3323E EUE
MAX3323EEPE
Pin Configurations continued at end of data sheet.
Control
Systems
Versions
TOP VIEW
L
±15kV—Human Body Model
±8kV—IEC 1000-4-2 Contact Discharge
±15kV—IEC 1000-4-2 Air-Gap Discharge
Pin for Compatibility with Mixed Voltage
PART
TOUT2
TOUT1
RIN2
RIN1
C1+
C2+
C1-
C2-
V+
V-
10
1
2
3
4
5
6
7
8
9
Ordering Information
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
MAX3322E
TSSOP
Pin Configurations
20
19
18
17
16
15
14
13
12
11
V
GND
SHDN
V
RENABLE
TXENABLE
TIN2
ROUT2
TIN1
ROUT1
CC
L
Features
PIN-PACKAGE
20 TSSOP
16 TSSOP
16 DIP
1
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