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MAX3323EEUE+

P1-P3P4-P6P7-P9P10-P12P13-P13
General Description
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
L
pin that allows
operation in mixed-logic voltage systems. Both input
and output logic levels are pin programmable through
the V
L
pin.
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.
Applications
Bar-Code Scanners
Video Security
Industrial Data Acquisition
Data Splitters
Features
♦ Pin-Selectable 5kΩ/High-Impedance Receivers
♦ Transmitter Outputs Three-Stated by Logic
Control
♦ V
L
Pin for Compatibility with Mixed Voltage
Systems
♦ 1Tx/1Rx (MAX3323E) or 2Tx/2Rx (MAX3322E)
Versions
♦ 250kbps Data Rate
♦ 1µA Low-Power Shutdown
♦ High ESD Protection for RS-232 I/O Pins
±15kV—Human Body Model
±8kV—IEC 1000-4-2 Contact Discharge
±15kV—IEC 1000-4-2 Air-Gap Discharge
MAX3322E/MAX3323E
±15kV ESD-Protected, RS-232 Transceivers for
Multidrop Applications
________________________________________________________________ Maxim Integrated Products 1
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
V
CC
GND
SHDN
V
L
C2+
C1-
V+
C1+
TOP VIEW
RENABLE
TXENABLE
TIN2
ROUT2RIN2
TOUT2
V-
C2-
12
11
9
10
TIN1
ROUT1RIN1
TOUT1
MAX3322E
TSSOP
Pin Configurations
Ordering Information
19-2667; Rev 1; 1/03
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.
PART TEMP RANGE
PIN-PACKAGE
MAX3322E EUP -40°C to +85°C 20 TSSOP
MAX3323E EUE -40°C to +85°C 16 TSSOP
MAX3323EEPE -40°C to +85°C 16 DIP
Pin Configurations continued at end of data sheet.
Typical Operating Circuit and Functional Diagram appear
at end of data sheet.
MAX3322E/MAX3323E
±15kV ESD-Protected, RS-232 Transceivers for
Multidrop Applications
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
All Voltages Referenced to GND
V
CC
, V
L
....................................................................-0.3V to +6V
V+ (Note 1) ....................................................(V
CC
- 0.3V) to +7V
V- (Note 1) ................................................................+0.3V to -7V
V+ + |V-| (Note 1) .................................................................+13V
Input Voltages
TIN_, RENABLE, TXENABLE,
SHDN .....................-0.3V to +6V
RIN_ ..................................................................................±25V
Output Voltages
TOUT_............................................................................±13.2V
ROUT_........................................................-0.3V to (V
L
+ 0.3V)
Short-Circuit Duration TOUT_ to GND........................Continuous
Continuous Power Dissipation (T
A
= +70°C)
16-Pin DIP (derate 10.5mW/°C above +70°C)............842mW
16-Pin TSSOP (derate 9.4mW/°C above +70°C) ........755mW
20-Pin TSSOP(derate 11mW/°C above +70°C) ..........879mW
Operating Temperature Range
MAX3322E/MAX3323E ...................................-40°C to +85°C
Junction Temperature..................................................... +150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 3.0V to 5.5V, V
L
= 1.65V to 5.5V, C1–C4 = 0.1µF, tested at +3.3V ±10%; C1 = 0.047µF, C2 = C3 = C4 = 0.33µF, tested at +5V
±10%; T
A
= T
MIN
to T
MAX
. Typical values are at V
CC
= V
L
= 3.3V and T
A
= +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
DC CHARACTERISTICS
Supply Current Normal Operation
I
CC
SHDN = V
L
, no load 1 mA
Supply Current in Shutdown
I
CC
(
SHDN
)
SHDN = 0V, no load 1 10 µA
TRANSMITTER LOGIC INPUTS
Input Logic Threshold Low 0.4 V
V
L
≤ 1.8V
V
L
- 0.4
Input Logic Threshold High
V
L
> 1.8V
2/3 x V
L
V
Transmitter Input Hysteresis 0.2 V
Input Leakage Current I
IL
±0.01
±1 µA
LOGIC INPUTS (TXENABLE, RENABLE, SHDN)
Input Logic Threshold Low 0.4 V
Input Logic Threshold High
2/3 x V
L
V
Input Leakage Current
±0.01
±1 µA
RECEIVER OUTPUTS
Output Leakage Current I
OL
Receivers disabled, SHDN = 0V
+ 0.05 + 10
µA
I
OUT
= 1.6mA, V
L
> 1.8V 0.4
Output Voltage Low V
OL
I
OUT
= 1mA, V
L
≤ 1.8V 0.4
V
I
OUT
= -1mA, V
L
> 1.8V
V
L
- 0.4 V
L
- 0.1
Output Voltage High V
OH
I
OUT
= -500µA, V
L
≤ 1.8V
V
L
- 0.4 V
L
- 0.1
V
RECEIVER INPUTS
Input Voltage Range V
RIN
-25
+25
V
V
L
= 1.65V
0.25
0.6
V
L
= 3.3V 0.6 1.2Input Threshold Low
V
L
= 5.0V 0.8 1.5
V
Note 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
MAX3322E/MAX3323E
±15kV ESD-Protected, RS-232 Transceivers for
Multidrop Applications
_______________________________________________________________________________________ 3
DC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 3.0V to 5.5V, V
L
= 1.65V to 5.5V, C1–C4 = 0.1µF, tested at +3.3V ±10%; C1 = 0.047µF, C2 = C3 = C4 = 0.33µF, tested at +5V
±10%; T
A
= T
MIN
to T
MAX
. Typical values are at V
CC
= V
L
= 3.3V and T
A
= +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
V
L
= 1.65V 1 1.4
V
L
= 3.3V 1.5 2.4
Input Threshold High
V
L
= 5.0V 1.8 2.4
V
Input Hysteresis
0.35
V
RENABLE = 1 3 5 7 kΩ
Input Resistance R
IN
RENABLE = 0 or SHDN = 0V, R
IN
from -13V
to +13V
1MΩ
TRANSMITTER OUTPUTS
Output Voltage Swing
All transmitter outputs loaded with 3kΩ to
ground
±5
±5.4
V
Output Resistance
V
CC
= V+ = V- = 0, TOUT_ = ±2V,
TXENABLE = 1
300
10M
Ω
Output Short-Circuit Current V
OUT
= 0V
±60
mA
Output Leakage Current V
OUT
= ±12V, transmitters disabled
±25
µA
ESD PROTECTION
Human Body Model
±15
IEC 1000-4-2 Air-Gap Discharge
±15
RIN, TOUT
IEC 1000-4-2 Contact Discharge ±8
kV
TIMING CHARACTERISTICS
(V
CC
= 3.0V to 5.5V, V
L
= 1.65V to 5.5V, C1–C4 = 0.1µF, tested at +3.3V ±10%; C1 = 0.047µF, C2 = C3 = C4 = 0.33µF, tested at +5V
±10%; T
A
= T
MIN
to T
MAX
. Typical values are at V
CC
= V
L
= 3.3V and T
A
= +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
Maximum Data Rate
R
L
= 3kΩ, C
L
= 1000pF, one transmitter
switching
250
kbps
t
PHL
150
Receiver Propagation Delay
t
PLH
RIN_ to ROUT_, C
L
= 30pF, V
L
= 3.3V,
Figure 2
180
ns
t
PHL
0.6
Transmitter Propagation Delay
t
PLH
TIN _ to TO U T_, R
L
= 3kΩ, C
L
= 1000p F,
Fi g ur e 1
0.7
µs
Time to Enter Three-State on Tx ( N ote 2) 10 50 µs
Time to Exit Three-State on Tx ( N ote 2) 3 50 µs
Time to Enable Resistor ( N ote 2) 0.4 10 µs
Time to Disable Resistor ( N ote 2) 0.2 10 µs
Time to Enter Shutdown 50 µs
Time to Exit Shutdown 50 µs
Transmitter Skew
100
ns
Receiver Skew 30 ns
Transition Region Slew Rate
R
L
= 3kΩ to 7kΩ, C
L
= 1000pF, measured
from +3V to -3V or vice versa
6 30 V/µs
Note 2: Guaranteed by design. Not production tested.
P1-P3P4-P6P7-P9P10-P12P13-P13

MAX3323EEUE+

Mfr. #:
Buy MAX3323EEUE+
Manufacturer:
Maxim Integrated
Description:
RS-232 Interface IC Transceiver For Multidrop Aps
Lifecycle:
New from this manufacturer.
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