19-1444; Rev 1; 7/99
+3V to +5.5V, 1.5Mbps
RS-232 Receivers in SOT23-5
General Description
The MAX3180–MAX3183 are single RS-232 receivers in
a SOT23-5 package for space- and cost-constrained
applications requiring minimal RS-232 communications.
These devices minimize power and heat dissipation by
consuming only 0.5µA supply current from a +3.0V to
+5.5V supply voltage. They guarantee true RS-232 per-
formance up to a 1.5Mbps data rate.
The MAX3180/MAX3182 feature a three-state TTL/
CMOS receiver output that is controlled by an
EN
logic
input. The MAX3181/MAX3183 feature an
INVALID
out-
put that indicates valid RS-232 signals at the receiver
input for applications requiring automatic system wake-
up. The MAX3180/MAX3181 receivers have a standard
inverting output, while the MAX3182/MAX3183 receivers
have a noninverting output.
o
Tiny SOT23-5 Package
o
0.5µA Supply Current
o
1.5Mbps Guaranteed Data Rate
o
Meet EIA/TIA-232 and V.28/V.24 Specifications
Down to V
CC
= +3.0V
o
INVALID
Output Indicates Valid RS-232 Signal at
Receiver Input (MAX3181/MAX3183)
o
Three-State TTL/CMOS Receiver Output
(MAX3180/MAX3182)
o
Noninverting RS-232 Output (MAX3182/MAX3183)
Features
MAX3180–MAX3183
Ordering Information
PART
TEMP. RANGE
PIN-
PACKAGE
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
TOP
MARK
ADKF
ADKG
ADKH
ADKI
Applications
Diagnostic Ports
Telecommunications
Networking Equipment
Set-Top Boxes
Digital Cameras
Hand-Held Equipment
MAX3180EUK-T
-40°C to +85°C
MAX3181EUK-T
-40°C to +85°C
MAX3182EUK-T
-40°C to +85°C
MAX3183EUK-T
-40°C to +85°C
Selector Guide
PART
MAX3180
MAX3181
MAX3182
MAX3183
PACKAGE
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SUPPLY
CURRENT (µA)
0.5
0.5
0.5
0.5
EN
INPUT
—
—
INVALID
OUTPUT
—
—
INVERTING
ROUT
—
—
NONINVERTING
ROUT
—
—
Pin Configurations/Functional Diagrams
TOP VIEW
EN (INVALID)
1
MAX3180
MAX3181
5k
5
V
CC
EN (INVALID)
1
MAX3182
MAX3183
5k
5
V
CC
GND
2
GND
2
ROUT
3
4
RIN
ROUT
3
4
RIN
SOT23-5
( ) ARE FOR MAX3181/MAX3183 ONLY
.
SOT23-5
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
+3V to +5.5V, 1.5Mbps
RS-232 Receivers in SOT23-5
MAX3180–MAX3183
ABSOLUTE MAXIMUM RATINGS
V
CC
to GND ..............................................................-0.3V to +6V
RIN to GND ..........................................................................±25V
EN,
ROUT,
INVALID
to GND ......................-0.3V to (V
CC
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
SOT23-5 (derate 7.1mW/°C above +70°C)...................571mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°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.
ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +5.5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +5.0V and T
A
= +25°C.) (Note 1)
PARAMETER
DC CHARACTERISTICS
Supply Voltage
Supply Current
LOGIC INPUT (EN)
Logic Threshold Low
Logic Threshold High
Leakage Current
LOGIC OUTPUT
INVALID
Output Voltage Low
INVALID
Output Voltage High
RECEIVER INPUT
Input Voltage Range
Input Threshold Low
Input Threshold High
Input Hysteresis
RIN Threshold to
INVALID
Output High
RIN Threshold to
INVALID
Output Low
Input Resistance
RECEIVER OUTPUT
Output Leakage Current
Output Voltage Low
Output Voltage High
I
ROUT
V
OL
V
OH
Receiver disabled
I
SINK
= 1.6mA
I
SOURCE
= 1.0mA
V
CC
-
0.6
V
CC
-
0.1
±0.05
±10
0.4
µA
V
V
V
RIN
V
ITL
V
ITH
V
HYST
V
ITOH
V
ITOL
R
RIN
Positive threshold
Negative threshold
-2.7
-0.3
3
5
0.3
7
V
CC
= 3.3V
V
CC
= 5.0V
V
CC
= 3.3V
V
CC
= 5.0V
-25
0.6
0.8
1.2
1.5
1.5
1.8
300
2.7
2.4
2.7
25
V
V
V
mV
V
V
kΩ
V
IOL
V
IOH
I
SINK
= 1.6mA
I
SOURCE
= 1.0mA
V
CC
-
0.6
0.4
V
V
V
IL
V
IH
I
EN
V
CC
= 3.3V
V
CC
= 5.0V
2.0
2.4
±0.01
±1.0
0.8
V
V
µA
V
CC
I
CC
V
CC
= 3.3V or 5V, RIN = V
CC
or GND, no load
3.0
0.5
5.5
5
V
µA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2
_______________________________________________________________________________________
+3V to +5.5V, 1.5Mbps
RS-232 Receivers in SOT23-5
MAX3180–MAX3183
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +5.5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +5.0V and T
A
= +25°C.) (Note 1)
PARAMETER
TIMING CHARACTERISTICS
Maximum Data Rate
Receiver Propagation Delay,
High-to-Low
Receiver Propagation Delay,
Low-to-High
Receiver Skew
Receiver Output Enable Time
Receiver Output Disable Time
Receiver Positive or Negative
Threshold to
INVALID
High
Receiver Positive or Negative
Threshold to
INVALID
Low
t
PHL
t
PLH
t
RS
t
ROE
t
ROD
t
INVH
t
INVL
C
L
= 50pF
RIN to ROUT; C
L
= 150pF
RIN to ROUT; C
L
= 150pF
1.5
0.15
0.15
50
200
200
250
30
Mbps
µs
µs
ns
ns
ns
ns
µs
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
|
t
PHL
- t
PLH
|
, Figure 1
Note 1:
Specifications are 100% tested at T
A
= +25°C. Limits over temperature are guaranteed by design.
Typical Operating Characteristics
(V
CC
= +5V, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. DATA RATE
MAX3180-01
RIN TO INVALID HIGH vs. SUPPLY VOLTAGE
MAX3180-02
0.7
0.6
SUPPLY CURRENT (mA)
0.5
0.4
0.3
V
CC
= 3.3V
0.2
0.1
0
0
0.5
1.0
R
L
= 50kΩ
C
L
= 100pF
350
330
310
t
INVH
(ns)
V
CC
= 5V
290
270
250
230
1.5
3.0
3.5
4.0
4.5
5.0
5.5
DATA RATE (Mbps)
V
CC
(V)
_______________________________________________________________________________________
3
+3V to +5.5V, 1.5Mbps
RS-232 Receivers in SOT23-5
MAX3180–MAX3183
Typical Operating Characteristics (continued)
(V
CC
= +5V, T
A
= +25°C, unless otherwise noted.)
MAX3180
ENABLE ASSERTION TO ROUT RESPONSE
10V
RIN
0
MAX3180-04
RIN TO INVALID LOW vs. SUPPLY VOLTAGE
MAX3180-03
60
55
50
t
INVL
(µs)
45
20V
-10V
5V
40
35
30
25
3.0
3.5
4.0
4.5
5.0
5.5
500ns/div
V
CC
(V)
ENABLE
0
ROUT
0
5V
V
CC
= 5.0V
R
L
= 50kΩ
C
L
= 100pF
Pin Description
NAME
PIN
MAX3180
EN
1
–
2
3
–
4
5
RIN
V
CC
–
RIN
V
CC
ROUT
RIN
V
CC
ROUT
RIN
V
CC
Noninverting Receiver Output
Receiver Input
Supply Voltage
GND
ROUT
MAX3181
–
INVALID
GND
ROUT
MAX3182
EN
–
GND
–
MAX3183
–
INVALID
GND
–
Receiver Output Enable
Output of the Valid Input Detector
Ground
Inverting Receiver Output
FUNCTION
4
_______________________________________________________________________________________
+3V to +5.5V, 1.5Mbps
RS-232 Receivers in SOT23-5
Detailed Description
The MAX3180–MAX3183 are EIA/TIA-232 and V.28/
V.24 communications receivers that convert RS-232
signals to CMOS logic levels. The devices operate on a
supply voltage of +3V to +5.5V and have a 1.5Mbps
data rate capability. They achieve a 0.5µA typical sup-
ply current. The MAX3180/MAX3182 have a receiver
enable control (EN), while the MAX3181/MAX3183 con-
tain a signal invalid output (INVALID). The MAX3180/
MAX3181 invert the ROUT signal relative to RIN. The
MAX3182/MAX3183 are not inverted. The devices
come in SOT23-5 packages.
Signal Invalid Detector
If no valid signal levels appear on RIN for 30µs (typ),
INVALID
goes low. This event typically occurs if the RS-
232 cable is disconnected or if the connected peripher-
al transmitter is turned off.
INVALID
goes high when a
valid level is applied to the RS-232 receiver input.
Figure 2 shows the input levels and timing diagram for
INVALID
operation.
MAX3180–MAX3183
Enable Input
The MAX3180/MAX3182 feature an enable input. Drive
EN
high to force ROUT into a high-impedance state. In
this state, the devices ignore incoming RS-232 signals.
Drive
EN
low for normal operation.
Power-Supply Decoupling
5V
RIN
0
t
PLH
V
OH
ROUT
V
OL
50%
t
PHL
50%
50%
50%
In most circumstances, a 0.1µF V
CC
bypass capacitor
is adequate for power-supply decoupling. Connect the
bypass capacitor as close to the IC as possible.
Chip Information
TRANSISTOR COUNT: 41
Figure 1. Receiver Propagation-Delay Timing
VALID SIGNALS (INVALID = 1)
RECEIVER INPUT LEVELS
+2.7V
INDETERMINATE
+0.3V
0
-0.3V
INDETERMINATE
-2.7V
VALID SIGNALS (INVALID = 1)
INVALID SIGNALS (INVALID = 0)
RECEIVER
INPUT
VOLTAGE
(V)
INVALID
REGION
V
CC
INVALID
OUTPUT
(V)
0
t
INVL
t
INVH
Figure 2. Input Levels and
INVALID
Timing
_______________________________________________________________________________________
5
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