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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.
Applications
Diagnostic Ports Set-Top Boxes
Telecommunications Digital Cameras
Networking Equipment Hand-Held Equipment
Features
♦Tiny SOT23-5 Package
♦0.5µA Supply Current
♦1.5Mbps Guaranteed Data Rate
♦Meet EIA/TIA-232 and V.28/V.24 Specifications
Down to VCC = +3.0V
♦INVALID Output Indicates Valid RS-232 Signal at
Receiver Input (MAX3181/MAX3183)
♦Three-State TTL/CMOS Receiver Output
(MAX3180/MAX3182)
♦Noninverting RS-232 Output (MAX3182/MAX3183)
MAX3180–MAX3183
+3V to +5.5V, 1.5Mbps
RS-232 Receivers in SOT23-5
________________________________________________________________
Maxim Integrated Products
1
19-1444; Rev 1; 7/99
Ordering Information
PART
MAX3180EUK-T
TOP
MARK
-40°C to +85°C
TEMP. RANGE PIN-
PACKAGE
5 SOT23-5 ADKF
MAX3181EUK-T -40°C to +85°C 5 SOT23-5 ADKG
MAX3182EUK-T -40°C to +85°C 5 SOT23-5 ADKH
MAX3183EUK-T -40°C to +85°C 5 SOT23-5 ADKI
Selector Guide
Pin Configurations/Functional Diagrams
MAX3180
SUPPLY
CURRENT (µA)
0.5
INVALID
OUTPUT
—
INVERTING
ROUT
✓
NONINVERTING
ROUT
—
MAX3181 0.5 ✓ ✓ —
MAX3182 0.5 — — ✓
MAX3183 0.5 ✓—✓
GND
RINROUT
15
5k
VCC
EN (INVALID)
MAX3180
MAX3181
SOT23-5
TOP VIEW
2
34
GND
RINROUT
15
5k
VCC
EN (INVALID)
MAX3182
MAX3183
SOT23-5
2
34
( ) ARE FOR MAX3181/MAX3183 ONLY.
EN
INPUT
✓
—
✓
—
PART
SOT23-5
PACKAGE
SOT23-5
SOT23-5
SOT23-5
MAX3180–MAX3183
+3V to +5.5V, 1.5Mbps
RS-232 Receivers in SOT23-5
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VCC = +3.0V to +5.5V, TA= TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA= +25°C.) (Note 1)
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.
VCC to GND..............................................................-0.3V to +6V
RIN to GND ..........................................................................±25V
EN, ROUT, INVALID to GND ......................-0.3V to (VCC + 0.3V)
Continuous Power Dissipation (TA= +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
ISOURCE = 1.0mA
VCC = 3.3V or 5V, RIN = VCC or GND, no load
Negative threshold
Positive threshold
VCC = 5.0V
VCC = 3.3V
ISINK = 1.6mA
VCC = 5.0V
VCC = 3.3V
VCC = 3.3V
VCC = 5.0V
CONDITIONS
kΩ357RRIN
Input Resistance
V
VCC - VCC -
0.6 0.1
VOH
Output Voltage High
V-0.3 0.3VITOL
RIN Threshold to INVALID
Output Low
V
-2.7
VITOH
ISOURCE = 1.0mA
2.7
V
RIN Threshold to INVALID
Output High
mV300VHYST
Input Hysteresis
V
1.8 2.7
VITH
Input Threshold High 1.5 2.4
VCC -
0.6
VIOH
V
0.8 1.5
VITL
Input Threshold Low 0.6 1.2
INVALID Output Voltage High
V-25 25VRIN
Input Voltage Range
µA0.5 5ICC
Supply Current
V3.0 5.5VCC
Supply Voltage
V0.4VIOL
INVALID Output Voltage Low
µA±0.01 ±1.0IEN
Leakage Current
V0.8VIL
Logic Threshold Low
2.0
ISINK = 1.6mA
V
2.4
VIH
Logic Threshold High
UNITSMIN TYP MAXSYMBOLPARAMETER
Receiver disabled
V0.4VOL
Output Voltage Low
µA±0.05 ±10IROUT
Output Leakage Current
DC CHARACTERISTICS
LOGIC INPUT (EN)
LOGIC OUTPUT
RECEIVER INPUT
RECEIVER OUTPUT
MAX3180–MAX3183
+3V to +5.5V, 1.5Mbps
RS-232 Receivers in SOT23-5
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +3.0V to +5.5V, TA= TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA= +25°C.) (Note 1)
ns250tINVH
Receiver Positive or Negative
Threshold to INVALID High
ns200tROD
Receiver Output Disable Time
µs30tINVL
Receiver Positive or Negative
Threshold to INVALID Low
RIN to ROUT; CL= 150pF µs0.15
CONDITIONS
tPHL
Receiver Propagation Delay,
High-to-Low
RIN to ROUT; CL= 150pF µs0.15tPLH
Receiver Propagation Delay,
Low-to-High
|tPHL - tPLH |, Figure 1
UNITSMIN TYP MAXSYMBOLPARAMETER
CL= 50pF
ns200tROE
Receiver Output Enable Time
ns50tRS
Receiver Skew
Mbps1.5Maximum Data Rate
TIMING CHARACTERISTICS
Typical Operating Characteristics
(VCC = +5V, TA= +25°C, unless otherwise noted.)
0
0.2
0.1
0.4
0.3
0.6
0.5
0.7
0 0.5 1.0 1.5
SUPPLY CURRENT vs. DATA RATE
MAX3180-01
DATA RATE (Mbps)
SUPPLY CURRENT (mA)
RL = 50kΩ
CL = 100pF
VCC = 5V
VCC = 3.3V
230
270
250
290
330
310
350
3.0 3.5 5.04.54.0 5.5
RIN TO INVALID HIGH vs. SUPPLY VOLTAGE
MAX3180-02
VCC (V)
tINVH (ns)
Note 1: Specifications are 100% tested at TA= +25°C. Limits over temperature are guaranteed by design.
MAX3180–MAX3183
+3V to +5.5V, 1.5Mbps
RS-232 Receivers in SOT23-5
4 _______________________________________________________________________________________
25
35
30
45
40
55
50
60
3.0 3.5 4.0 4.5 5.0 5.5
RIN TO INVALID LOW vs. SUPPLY VOLTAGE
MAX3180-03
VCC (V)
tINVL (µs)
Typical Operating Characteristics (continued)
(VCC = +5V, TA= +25°C, unless otherwise noted.)
5V
0
10V
0
-10V
RIN
ROUT
ENABLE
5V
0
500ns/div
MAX3180
ENABLE ASSERTION TO ROUT RESPONSE
MAX3180-04
VCC = 5.0V
RL = 50kΩ
CL = 100pF
20V
Pin Description
MAX3181
–
1
EN Receiver Output Enable
NAME
EN
MAX3180
Noninverting Receiver Output
FUNCTION
MAX3182
PIN
ROUT
– Output of the Valid Input Detector
–
2 GND GroundGND
3
ROUT Inverting Receiver Output–
4 RIN Receiver InputRIN
5 VCC Supply VoltageVCC
MAX3183
–
INVALID
GND
ROUT
–
RIN
VCC
–
INVALID
GND
–
ROUT
RIN
VCC
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.
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
In most circumstances, a 0.1µF VCC bypass capacitor
is adequate for power-supply decoupling. Connect the
bypass capacitor as close to the IC as possible.
MAX3180–MAX3183
+3V to +5.5V, 1.5Mbps
RS-232 Receivers in SOT23-5
_______________________________________________________________________________________ 5
50% 50%
50%
0
RIN
5V
ROUT 50%
tPLH tPHL
VOL
VOH
Figure 1. Receiver Propagation-Delay Timing
VALID SIGNALS (INVALID = 1)
INVALID SIGNALS (INVALID = 0)
VALID SIGNALS (INVALID = 1)
RECEIVER INPUT LEVELS
-2.7V
-0.3V
+2.7V
+0.3V
0
INDETERMINATE
INDETERMINATE
0
VCC
tINVL
INVALID
REGION
RECEIVER
INPUT
VOLTAGE
(V)
INVALID
OUTPUT
(V)
tINVH
Figure 2. Input Levels and INVALID Timing
Chip Information
TRANSISTOR COUNT: 41
MAX3180–MAX3183
+3V to +5.5V, 1.5Mbps
RS-232 Receivers in SOT23-5
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
6
_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
6
_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
Package Information
SOT5L.EPS
