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MAX3380ECUP

P1-P3P4-P6P7-P9P10-P12P13-P14
General Description
The MAX3380E/MAX3381E are +2.35V to +5.5V-pow-
ered EIA/TIA-232 and V.28/V.24 communication inter-
faces with low power requirements, high data-rate
capabilities, and enhanced electrostatic discharge
(ESD) protection on both the TTL and RS-232 sides.
The MAX3380E/MAX3381E have two receivers and two
transmitters. All RS-232 inputs, outputs, and logic input
pins are protected to ±15kV using IEC 1000-4-2 Air-
Gap Discharge method and the Human Body Model,
and ±8kV using IEC 1000-4-2 Contact Discharge
method.
The proprietary low-dropout transmitter output stage
enables true RS-232 performance from a +3.1V to
+5.5V supply with a dual charge pump. The parts
reduce the transmitter output levels to RS-232-compati-
ble levels with no increase in supply current for sup-
plies less than +3.1V and greater than +2.35V. The
+2.35V to +5.5V operating range is fully compatible
with lithium-ion (Li+) batteries. The charge pump
requires only four small 0.1µF capacitors for operation.
The MAX3380E/MAX3381E transceivers use Maxim’s
revolutionary AutoShutdown Plus™ feature to auto-
matically enter a 1µA shutdown mode. These
devices shut down the on-board power supply and
drivers when they do not sense a valid signal transi-
tion for 30 seconds on either the receiver or trans-
mitter inputs.
The MAX3380E is capable of transmitting data at
rates of 460kbps while maintaining RS-232 output
levels, and the MAX3381E operates at data rates up
to 250kbps. The MAX3381E offers a slower slew rate
for applications where noise and EMI are issues. The
MAX3380E/MAX3381E have a unique V
L
pin that
allows interoperation in mixed-logic voltage systems
down to +1.65V. Both input and output logic levels
are referenced to the V
L
pin. The MAX3380E/MAX3381E
are available in a space-saving TSSOP package.
Applications
Cell Phone Data Lump Cables
PDA Data Lump Cables
GPS Receivers
Digital Cameras
Features
♦ ±15kV ESD Protection on All CMOS and RS-232
Inputs and Outputs (Except INVALID)
±15kV Human Body Model
±15kV IEC 1000-4-2 Air-Gap Discharge
±8kV IEC 1000-4-2 Contact Discharge
♦ Operates Over Entire Li+ Battery Range
♦ Low Logic Threshold Down to +1.65V for
Compatibility with Cell Phone Logic Supply Voltages
♦ 1µA Low-Power AutoShutdown Plus Mode
♦ Compatible with Next-Generation GSM Data Rates
♦ 20-Pin TSSOP Package
MAX3380E/MAX3381E
+2.35V to +5.5V, 1µA, 2Tx/2Rx RS-232 Transceivers
with ±15kV ESD-Protected I/O and Logic Pins
________________________________________________________________ Maxim Integrated Products 1
19-2128; Rev 0; 8/01
Ordering Information
PART TEMP. RANGE
PIN-PACKAGE
MAX3380ECUP
0°C to +70°C
20 TSSOP
MAX3380EEUP
-40°C to +85°C
20 TSSOP
MAX3381ECUP
0°C to +70°C
20 TSSOP
MAX3381EEUP
-40°C to +85°C
20 TSSOP
Pin Configuration appears at end of data sheet.
MAX3380E/
MAX3381E
R2OUT
R1OUT
R2IN
GND
RS-232
OUTPUTS
TTL/CMOS
INPUTS
T2IN
T1IN
C2-
C2+
C1-
C1+
R1IN
T2OUT
T1OUT
V-
V+
V
CC
V
L
C1
0.1μF
C2
0.1μF
C5
0.1μF
+3.3V
RS-232
INPUTS
TTL/CMOS
OUTPUTS
5kΩ
5kΩ
C3
0.1μF
C4
0.1μF
V
L
V
L
FORCEON
FORCEOFF
Typical Operating Circuit
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.
AutoShutdown Plus is a trademark of Maxim Integrated Products
MAX3380E/MAX3381E
+2.35V to +5.5V, 1µA, 2Tx/2Rx RS-232 Transceivers
with ±15kV ESD-Protected I/O and Logic Pins
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +2.35V to +5.5V, V
L
= +1.65V to +5.5V. When V
CC
< +4.5V, C1 = C2 = C3 = C4 = 0.1µF; when V
CC
≥ +4.5V, C1 = 0.047µF,
C2 = C3 = C4 = 0.33µF; T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= V
L
= +3.3V, 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 +6.0V
V
L
to GND..............................................................-0.3V to +6.0V
V+ to GND .............................................................-0.3V to +7.0V
V- to GND ..............................................................+0.3V to -7.0V
V+ + |V-| (Note 1) .................................................................+13V
Input Voltages
T_IN, FORCEON,
FORCEOFF to GND ...............-0.3V to +6.0V
R_IN to GND .....................................................................±25V
Output Voltages
T_OUT to GND...............................................................±13.2V
R_OUT, INVALID to GND...........................-0.3V to (V
L
+ 0.3V)
Short-Circuit Duration T_OUT to GND........................Continuous
Continuous Power Dissipation (T
A
= +70°C)
20-Pin TSSOP (derate 10.9mW/°C over +70°C) .........879mW
Operating Temperature Ranges
MAX3380ECUP/MAX3381ECUP........................0°C to +70°C
MAX3380EEUP/MAX3381EEUP .....................-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
CONDITIONS
MIN
MAX
UNITS
Receivers idle, V
T
_
IN
= V
CC
or GND,
FORCEON = GND, FORCEOFF = V
CC
10
Supply Current, AutoShutdown
Plus
I
CC
FORCEOFF = GND 1 10
µA
Supply Current, Normal Operation
I
CC
FORCEON = FORCEOFF = V
L
, no load 0.3 1
mA
LOGIC INPUTS (T_IN, FORCEON, FORCEOFF)
V
CC
= +5.5V, V
L
= +5.5V 0.4 1.2
Input Logic Threshold Low V
IL
V
CC
= +2.5V, V
L
= +1.65V 0.4
V
V
CC
= +5.5V, V
L
= +5.5V
V
L
✕ 0.66
Input Logic Threshold High V
IH
V
CC
= +2.5V, V
L
= +1.65V
V
L
✕ 0.66
V
Transmitter Input Hysteresis 0.5 V
Input Leakage Current
±0.01
±1µA
RECEIVER OUTPUTS (R_OUT) AND INVALID
Output Voltage Low I
OUT
= 500µA 0.5 V
Output Voltage High I
OUT
= -500µA
V
L
- 0.4 V
L
- 0.2
V
RECEIVER INPUTS (R_IN)
Input Voltage Range -25
+25
V
V
L
= +3.3V 0.6 1.2
Input Threshold Low T
A
= +25°C
V
L
= +5.0V 0.8 1.5
V
V
L
= +3.3V 1.5 2.4
Input Threshold High T
A
= +25°C
V
L
= +5.0V 1.8 2.4
V
Input Hysteresis 0.3 V
Input Resistance T
A
= +25°C 3 5 7 kΩ
MAX3380E/MAX3381E
+2.35V to +5.5V, 1µA, 2Tx/2Rx RS-232 Transceivers
with ±15kV ESD-Protected I/O and Logic Pins
_______________________________________________________________________________________ 3
PARAMETER
SYMBOL
CONDITIONS MIN
TYP MAX
UNITS
AutoShutdown Plus (FORCEON = GND, FORCEOFF = V
L
)
Positive threshold 2.7
Receiver Input Threshold to
INVALID Output High
Figure 3
Negative threshold
-2.7
V
Receiver Input Threshold to
INVALID Output Low
Figure 3
-0.3
0.3 V
Receiver Positive or Negative
Threshold to INVALID High
t
INVL
V
CC
= +5.0V, Figure 4 0.3 µs
Receiver Positive or Negative
Threshold to INVALID Low
t
INVH
V
CC
= +5.0V, Figure 4 30 µs
Receiver or Transmitter Edge to
Transmitters Enabled
t
WU
V
CC
= +5.0V, Figure 4 15 µs
Receiver or Transmitter Edge to
Transmitters Shutdown
t
AU T OS H D N
V
CC
= +5.0V, Figure 4 30 s
TRANSMITTER OUTPUTS
V
CC
Mode Switch Point
(V
CC
Falling)
T_OUT = ±5.0V to ±3.7V
2.95
3.1
3.25
V
V
CC
Mode Switch Point
(V
CC
Rising)
T_OUT = ±3.7V to ±5.5V 3.3 3.5 3.7 V
V
CC
Mode Switch Point
Hysteresis
400
mV
V
C C
= + 3.25V to + 5.5V ,
V
C C
fal l i ng
±5
±5.4
Output Voltage Swing
All transmitter
outputs loaded
with 3kΩ to ground
V
C C
= + 2.5V to + 2.95V ,
V
C C
fal l i ng
±3.7
V
Output Resistance V
CC
= 0, transmitter output = ±2.0V
300 10M
Ω
Output Short-Circuit Current ±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 Method
±15
R_IN, T_OUT, R_OUT, T_IN,
FORCEON, FORCEOFF
IEC 1000-4-2 Contact Discharge Method ±8
kV
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +2.35V to +5.5V, V
L
= +1.65V to +5.5V. When V
CC
< +4.5V, C1 = C2 = C3 = C4 = 0.1µF; when V
CC
≥ +4.5V, C1 = 0.047µF,
C2 = C3 = C4 = 0.33µF; T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= V
L
= +3.3V, T
A
= +25°C.)
P1-P3P4-P6P7-P9P10-P12P13-P14

MAX3380ECUP

Mfr. #:
Buy MAX3380ECUP
Manufacturer:
Maxim Integrated
Description:
RS-232 Interface IC +2.35V to +5.5V, 1 A, 2Tx/2Rx RS-232 Transceivers with 15kV ESD-Protected I/O and Logic Pins
Lifecycle:
New from this manufacturer.
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