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MAX3388ECUG+T

P1-P3P4-P6P7-P9P10-P11
General Description
The MAX3388E/MAX3389E are 2.5V-powered EIA/TIA-
232 and V.28/V.24 communications interfaces with low
power requirements, high data-rate capabilities, and
enhanced electrostatic discharge (ESD) protection. The
MAX3388E/MAX3389E have two 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.
In addition to the traditional RS-232 I/O, these devices have
dedicated logic-level I/O pins for additional device-to-
device handshaking. During shutdown the logic-level I/O
pins are active for the MAX3389E. An internal 62Ω switch is
provided to switch power to external circuitry or modules.
A proprietary low-dropout transmitter output stage
enables RS-232 compatible performance from a +2.35V
to +3.0V supply with a dual charge pump. The charge
pump requires only four small 0.1µF capacitors for oper-
ation from a +2.5V supply. The MAX3388E/MAX3389E
are capable of running at data rates up to 460kbps while
maintaining RS-232-compatible output levels.
The MAX3388E/MAX3389E have a unique V
L
pin that
allows interoperation in mixed-logic voltage systems.
Both input and output logic levels are pin programma-
ble through the V
L
pin. The MAX3388E/MAX3389E are
available in a space-saving TSSOP package.
Features
♦ V
L
Pin for Compatibility with Mixed-Voltage
Systems
♦ Additional I/O for Hot-Sync Applications
♦ ±15kV ESD Protection on Rx Inputs, Tx Outputs,
LIN, and SWIN
♦ Low 300µA Supply Current
♦ Guaranteed 460kbps Data Rate
♦ 1µA Low-Power Shutdown
♦ Integrated Switch for Powering Remote Circuitry
♦ Flow-Through Pinout
♦ L
OUT
Active During Shutdown (MAX3389E)
Applications
Subnotebook/Palmtop Computers
PDAs and PDA Cradles
Cell Phone Data Cables
Battery-Powered Equipment
Hand-Held Equipment
Peripherals
MAX3388E/MAX3389E
2.5V, ±15kV ESD-Protected RS-232
Transceivers for PDAs and Cell Phones
________________________________________________________________ Maxim Integrated Products 1
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
SHDN
V
CC
GND
T1OUTC2+
C1-
V+
C1+
TOP VIEW
T2OUT
T3OUT
R1IN
R2INT2IN
T1IN
V-
C2-
16
15
14
13
9
10
11
12
LIN
SWIN
V
L
R1OUTR2OUT
SWOUT
LOUT
T3IN
TSSOP
MAX3388E
MAX3389E
Typical Operating Circuit
19-1845; Rev 1; 9/01
Pin Configuration
Ordering Information
PART TEMP. RANGE PIN-PACKAGE
MAX3388ECUG
0°C to +70°C 24 TSSOP
MAX3388EEUG -40°C to +85°C 24 TSSOP
MAX3389ECUG
0°C to +70°C 24 TSSOP
MAX3389EEUG -40°C to +85°C 24 TSSOP
MAX3388E
MAX3389E
R2OUT12
R1OUT
V
L
13
R2IN
17
GND
22
RS-232
I/O
T2IN
8
T1IN
7
C2-
5
C2+
4
C1-
3
C1+
1
R1IN
18
T2OUT
20
T1OUT
21
V-
6
V+
2
V
CC
V
L
14
23
C1
0.1µF
C2
0.1µF
C
BYPASS
+2.5V
T3IN
9
T3OUT
19
5kΩ
5kΩ
C3
0.1µF
C4
0.1µF
V
L
24
SHDN
SWIN
15
16
LIN
30kΩ
11
SWOUT
SHDN
10 LOUT
= ±15kV ESD PROTECTION
C;
4.
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.
MAX3388E/MAX3389E
2.5V, ±15kV ESD-Protected RS-232
Transceivers for PDAs and Cell Phones
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(V
CC
= V
L
= +2.35V to +3.0V, C1–C4 = 0.1µF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= V
L
= +2.5V,
T
A
= +25°C.)
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.
Note 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
V
CC
to GND..............................................................-0.3V to +6V
V
L
to GND...................................................-0.3V to (V
CC
+ 0.3V)
V+ to GND ................................................................-0.3V to +7V
V- to GND .................................................................+0.3V to -7V
V+ +V-(Note 1) ............................................................... +13V
Input Voltages
T_IN, SHDN, LIN to GND.......................................-0.3V to +6V
R_IN to GND .....................................................................±25V
SWIN to GND...........................................-0.3V to (V
CC
+ 0.3V)
Output Voltages
T_OUT to GND...............................................................±13.2V
R_OUT, SWOUT, LOUT to GND ................-0.3V to (V
L
+ 0.3V)
Short-Circuit Duration T_OUT to GND........................Continuous
Continuous Power Dissipation (T
A
= +70°C)
24-Pin TSSOP (derate 12.2mW/°C above +70°C) ........975mW
Operating Temperature Ranges
MAX338_ECUG ...................................................0°C to +70°C
MAX338_EEUG.................................................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYMBOL
Shutdown Supply Current
Supply Current
Input Logic Low
Input Logic High
Transmitter Input Hysteresis
Input Leakage Current
Output Leakage Current
Output Voltage Low
Output Voltage High
Input Voltage Range
Input Threshold Low
Input Threshold High
Input Hysteresis
Input Resistance T
A
= +25°C
I
OUT
= -1mA
I
OUT
= 1.6mA
R_OUT, SHDN = 0
V
L
= +2.5V
V
L
= +2.5V
SHDN = V
CC
, no load
SHDN = GND, all inputs at GND
CONDITIONS MIN TYP MAX
110
0.3 1
UNITS
µA
mA
0.6 V
1.5 V
0.4 V
µA±0.01 ±1
µA±0.05 ±10
0.4 V
V
L
- V
L
-
0.6 0.13
V
-25 +25 V
0.6 1.1 V
V1.8 2.4
V
kΩ
0.7
357
All transmitter outputs loaded with 3kΩ to
ground
Output Voltage Swing ±3.7 ±4.2
Output Resistance V
CC
= 0, transmitter output = ±2V Ω300 10M
Output Short-Circuit Current V
T_OUT
= 0 mA±60
DC CHARACTERISTICS (V
CC
= +2.5V, T
A
= +25°C)
LOGIC INPUTS (T_IN, SHDN)
RECEIVER OUTPUTS
RECEIVER INPUTS
TRANSMITTER OUTPUTS
V
T
A
= +25°C, V
L
= +2.5V
T
A
= +25°C, V
L
= +2.5V
MAX3388E/MAX3389E
2.5V, ±15kV ESD-Protected RS-232
Transceivers for PDAs and Cell Phones
_______________________________________________________________________________________ 3
TIMING CHARACTERISTICS
(V
CC
= V
L
= +2.35V to +3.0V, C1–C4 = 0.1µF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= V
L
= +2.5V,
T
A
= +25°C.)
t
PHL
- t
PLH
Note 2: Guaranteed by correlation.
Note 3: Transmitter skew is measured at the transmitter zero crosspoint.
DC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= V
L
= +2.35V to +3.0V, C1–C4 = 0.1µF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= V
L
= +2.5V,
T
A
= +25°C.)
PARAMETER
Maximum Data Rate
Receiver Propagation Delay
Receiver Output Enable Time
Receiver Output Disable Time
Time to Exit Shutdown
Transmitter Skew
Receiver Skew
Transition-Region Slew
Rate
t
PHL
- t
PLH
t
PLH
t
PHL
SYMBOL CONDITIONS
R
L
= 3kΩ, C
L
= 1000pF,
one transmitter switching
Receiver input to receiver output,
C
L
= 150pF
V
T_OUT
> 3.7V
R
L
= 3kΩ, C
L
= 1000pF (Note 3)
V
CC
= +2.5V, T
A
= +25°C,
R
L
= 3kΩ to 7kΩ,
measured from +3V
to -3V or -3V to +3V,
one transmitter switching
C
L
= 150pF to
1000pF
C
L
= 150pF to
2500pF
430
630
50
100
30
200
200
0.15
0.15
250
MIN TYP MAX UNITS
kbps
µs
ns
ns
µs
ns
ns
V/µs
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Output Leakage Current
V
T_OUT
= ±12V, transmitters disabled,
V
CC
= 0 or +2.5V
±25 µA
HANDSHAKING I/O (LIN, LOUT)
Input Voltage Range 0V
CC
V
Input Threshold Low LIN, V
L
= +2.5V, T
A
= +25°C 0.6 1.1 V
Input Threshold High LIN, V
L
= +2.5V, T
A
= +25°C 1.7 2 V
Input Hysteresis 0.6 V
Input Resistance T
A
= +25
o
C2040kΩ
Output Voltage Low LOUT, I
SINK
= 1.6mA 0.4 V
Output Leakage Current LOUT = V
L
, LIN = low or float ±10 µA
SWITCH (SWIN, SWOUT)
Input Voltage Range 0V
CC
V
On-Resistance 62 100 Ω
Off-Leakage Current SHDN = 0 ±1µA
Turn-On Time 0.18 µs
Turn-Off Time 0.7 µs
ESD PROTECTION
Human Body Model ±15
IEC 1000-4-2 Air-Gap Discharge method ±15
R_IN, T_OUT, LIN, SWIN
ESD Protection
IEC 1000-4-2 Contact Discharge method ±8
kV
R
L
= 3kΩ, C
L
= 150pF,
one transmitter switching (Note 2)
460
t
PHL
- t
PLH
P1-P3P4-P6P7-P9P10-P11

MAX3388ECUG+T

Mfr. #:
Buy MAX3388ECUG+T
Manufacturer:
Maxim Integrated
Description:
RS-232 Interface IC 2.5V Transceiver for PDAs & Cells
Lifecycle:
New from this manufacturer.
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