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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 0.5A supply current from a +3.0V to +5.5V supply voltage. They guarantee true RS-232 performance 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 output that indicates valid RS-232 signals at the receiver input for applications requiring automatic system wakeup. The MAX3180/MAX3181 receivers have a standard inverting output, while the MAX3182/MAX3183 receivers have a noninverting output. o Tiny SOT23-5 Package o 0.5A Supply Current o 1.5Mbps Guaranteed Data Rate o Meet EIA/TIA-232 and V.28/V.24 Specifications Down to VCC = +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 PINPACKAGE 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 -40C to +85C MAX3181EUK-T -40C to +85C MAX3182EUK-T -40C to +85C MAX3183EUK-T -40C to +85C
Selector Guide
PART MAX3180 MAX3181 MAX3182 MAX3183 PACKAGE SOT23-5 SOT23-5 SOT23-5 SOT23-5 SUPPLY CURRENT (A) 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
VCC
EN (INVALID)
1
MAX3182 MAX3183
5k
5
VCC
GND 2
GND 2
ROUT 3
4
RIN
ROUT 3
4
RIN
SOT23-5
( ) ARE FOR MAX3181/MAX3183 ONLY.
SOT23-5
________________________________________________________________ Maxim Integrated Products
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+3V to +5.5V, 1.5Mbps RS-232 Receivers in SOT23-5 MAX3180-MAX3183
ABSOLUTE MAXIMUM RATINGS
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 = +70C) SOT23-5 (derate 7.1mW/C above +70C)...................571mW Operating Temperature Range ...........................-40C to +85C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10sec) .............................+300C
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
(VCC = +3.0V to +5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25C.) (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 IROUT VOL VOH Receiver disabled ISINK = 1.6mA ISOURCE = 1.0mA VCC 0.6 VCC 0.1 0.05 10 0.4 A V V VRIN VITL VITH VHYST VITOH VITOL RRIN Positive threshold Negative threshold -2.7 -0.3 3 5 0.3 7 VCC = 3.3V VCC = 5.0V VCC = 3.3V VCC = 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 k VIOL VIOH ISINK = 1.6mA ISOURCE = 1.0mA VCC 0.6 0.4 V V VIL VIH IEN VCC = 3.3V VCC = 5.0V 2.0 2.4 0.01 1.0 0.8 V V A VCC ICC VCC = 3.3V or 5V, RIN = VCC or GND, no load 3.0 0.5 5.5 5 V A SYMBOL CONDITIONS MIN TYP MAX UNITS
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+3V to +5.5V, 1.5Mbps RS-232 Receivers in SOT23-5 MAX3180-MAX3183
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 = +25C.) (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 tPHL tPLH tRS tROE tROD tINVH tINVL CL = 50pF RIN to ROUT; CL = 150pF RIN to ROUT; CL = 150pF 1.5 0.15 0.15 50 200 200 250 30 Mbps s s ns ns ns ns s SYMBOL CONDITIONS MIN TYP MAX UNITS
| tPHL - tPLH |, Figure 1
Note 1: Specifications are 100% tested at TA = +25C. Limits over temperature are guaranteed by design.
Typical Operating Characteristics
(VCC = +5V, TA = +25C, 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 VCC = 3.3V 0.2 0.1 0 0 0.5 1.0 RL = 50k CL = 100pF
350 330 310 tINVH (ns)
VCC = 5V
290 270 250 230
1.5
3.0
3.5
4.0
4.5
5.0
5.5
DATA RATE (Mbps)
VCC (V)
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+3V to +5.5V, 1.5Mbps RS-232 Receivers in SOT23-5 MAX3180-MAX3183
Typical Operating Characteristics (continued)
(VCC = +5V, TA = +25C, 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 tINVL (s) 45
20V
-10V 5V 40 35 30 25 3.0 3.5 4.0 4.5 5.0 5.5 500ns/div VCC (V) ENABLE 0 ROUT 0 5V VCC = 5.0V RL = 50k CL = 100pF
Pin Description
NAME PIN MAX3180 EN 1 - 2 3 - 4 5 RIN VCC - RIN VCC ROUT RIN VCC ROUT RIN VCC 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
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+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 0.5A typical supply current. The MAX3180/MAX3182 have a receiver enable control (EN), while the MAX3181/MAX3183 contain 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 30s (typ), INVALID goes low. This event typically occurs if the RS232 cable is disconnected or if the connected peripheral 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 VOH ROUT VOL 50% t PHL 50% 50% 50%
In most circumstances, a 0.1F VCC 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
VCC INVALID OUTPUT (V) 0
tINVL
tINVH
Figure 2. Input Levels and INVALID Timing
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+3V to +5.5V, 1.5Mbps RS-232 Receivers in SOT23-5 MAX3180-MAX3183
Package Information
SOT5L.EPS
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 (c) 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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