MAX3160CAP+ ,+3.0V to +5.5V, 1µA, RS-232/RS-485/422 Multiprotocol TransceiversEVALUATION KIT AVAILABLE+3.0V to+5.5V, 1µA, RS-232/MAX3160/MAX3161/MAX3162RS-485/422 Multiprotocol ..
MAX3160CAP+ ,+3.0V to +5.5V, 1µA, RS-232/RS-485/422 Multiprotocol TransceiversApplications• Enables Single-Supply Operation From +3V toPoint-of-Sales Equipment Peripherals +5.5V ..
MAX3160EAP ,+3.0V to +5.5V / 1A / RS-232/RS-485/422 Multiprotocol TransceiversApplicationsPoint-of-Sales Equipment Peripherals+3V TO +5.5VIndustrial Controls Networking1RS-232 t ..
MAX3160EAP ,+3.0V to +5.5V / 1A / RS-232/RS-485/422 Multiprotocol TransceiversMAX3160/MAX3161/MAX3162 19-1722; Rev 1; 9/00+3.0V to +5.5V, 1µA, RS-232/RS-485/422Multiprotocol Tra ..
MAX3160EAP+ ,±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol TransceiversFeaturesThe MAX3160E/MAX3161E/MAX3162E are programma-• Flexible Options for RS-232 and RS-422/485bl ..
MAX3160EAP+T ,±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol TransceiversApplicationsPoint-of-Sales Equipment Peripherals +3V TO +5.5VIndustrial Controls Networking2RS-232 ..
MAX638ACPA ,+5V/Adjustable CMOS Step-down Switching Regulatorapplications require only a small, low-cost induc-
tor, an output filter capacitor, and a catch di ..
MAX638ACPA ,+5V/Adjustable CMOS Step-down Switching Regulator19-0919; Rev f; 7/96
+5V/Adjustable CMOS Step-down
Switching Regulator
MAX638ACPA ,+5V/Adjustable CMOS Step-down Switching RegulatorGeneral Description
The MAX638 step-down switching regulator is designed
for minimum component, ..
MAX638ACPA ,+5V/Adjustable CMOS Step-down Switching Regulatorapplications require only a small, low-cost induc-
tor, an output filter capacitor, and a catch di ..
MAX638ACSA ,+5V/Adjustable CMOS Step-down Switching RegulatorGeneral Description
The MAX638 step-down switching regulator is designed
for minimum component, ..
MAX638ACSA ,+5V/Adjustable CMOS Step-down Switching RegulatorApplications MAX638AEPA -4CY'C to +85°C 8 Plastic DIP
Efficient DC-DC Step-Down Regulation MAX638A ..
MAX3160CAP+-MAX3161CAG+-MAX3162CAI+
+3.0V to +5.5V, 1µA, RS-232/RS-485/422 Multiprotocol Transceivers
MAX3160/MAX3161/MAX3162+3.0V to+5.5V, 1µA, RS-232/
RS-485/422 Multiprotocol TransceiversEVALUATION KIT AVAILABLE
General DescriptionThe MAX3160/MAX3161/MAX3162 are programmable
+3V to +5.5V RS-232/RS-485/422 multiprotocol trans-
ceivers. The MAX3160/MAX3161 are pin programmable
as a 2TX/2RX RS-232 interface or a single RS-485/422
transceiver. The MAX3162 is configured as a 2TX/2RX
RS-232 interface and a single RS-485/422 transceiver
simultaneously.
All devices incorporate a proprietary low-dropout trans-
mitter output stage and an on-board dual charge pump
to allow RS-232 and RS-485/422 compliant perfor-
mance from a +3V to +5.5V supply. These devices also
feature pin-selectable transmitter slew rates for both
RS-232 and RS-485/422 modes. Slew-rate limiting mini-
mizes EMI and reduces reflections caused by improp-
erly terminated cables, allowing error-free data
transmission up to 250kbps. Disabling slew-rate limiting
allows these devices to transmit at data rates up to
10Mbps in RS-485/422 mode and up to 1Mbps in RS-
232 mode.
The MAX3160/MAX3162 offer a flow-through pinout that
facilitates board layout. The MAX3160/MAX3161/
MAX3162 are available in tiny SSOP packages and
operate from -40°C to +85°C.
ApplicationsPoint-of-Sales EquipmentPeripherals
Industrial ControlsNetworking
RS-232 to RS-485
Interface Converters
Benefits and FeaturesFlexible Options for RS-232 and RS-422/485
Operation in One PackageSimultaneous 2TX/2RX RS-232 and Half-Duplex
RS-485 Transceiver Operation (MAX3162)Pin-Programmable as Either 2TX/2RX RS-232 or
Half/Full RS-485 Transceiver (MAX3160,
MAX3161)
Integrated Protection Increases RobustnessTransmitters and Receivers Protected Against
Wiring FaultsTrue Fail-Safe Receiver Prevents False Transition
on Receiver Input Short or OpenShort-Circuit Protection Over the Entire Common-
Mode Voltage RangeThermal Protection from Excessive Power
DissipationSlew Rate Limiting Minimizes EM and Reduces
Cable Reflections
Integrated Charge-Pump Circuitry Saves Board
SpaceEliminates the Need for a Bipolar ±12V SupplyEnables Single-Supply Operation From +3V to
+5.5V Voltage Supply
1µA Shutdown Supply Current Saves Power
Allows Up to 256 Transceivers on the Bus
PART TEMP RANGE PIN-PACKAGEMAX3160CAP+ 0°C to +70°C 20 SSOPMAX3160EAP+ -40°C to +85°C 20 SSOP
MAX3161CAG+ 0°C to +70°C 24 SSOPMAX3161EAG+ -40°C to +85°C 24 SSOP
MAX3162CAI+ 0°C to +70°C 28 SSOPMAX3162EAI+ -40°C to +85°C 28 SSOP
Ordering Information
Typical Operating Circuit
Pin Configurations appear at end of data sheet.
Selector Guide appears at end of data sheet.VCC
DI/T1INZ(B)/T1OUT
R1OUTB/R1IN
GNDFASTHDPLXSHDN
Y(A)/T2OUT
A/R2IN
CTS
DE/T2INRTS156
RO/R2OUTRX8131410125
RJ45
DB9
SHDNµP
SPI
MAX3100
RS485/RS232
MAX3160
+3V TO +5.5V
+Denotes a lead(Pb)-free/RoHS-compliant package.
MAX3160/MAX3161/MAX3162+3.0V to+5.5V, 1µA, RS-232/
RS-485/422 Multiprotocol Transceivers
Electrical Characteristics(VCC= +3V to +5.5V, C1–C4 = 0.1µF when tested at +3.3V ±10%; C1 = 0.047µF and C2, C3, C4 = 0.33µF when tested at +5V
±10%; TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +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.
VCCto GND..............................................................-0.3V to +6V
V+ to GND................................................................-0.3V to +7V
V- to GND....................................................................0.3V to -7V
V+ - V- (Note 1)....................................................................+13V
Input Voltages
T1IN, T2IN, DI, DE485, RE485, TE232, RE232, SHDN,
FAST, HDPLX, RS485/RS232to GND................-0.3V to +6V
A, B, R1IN, R2IN to GND...............................................±25V
Output Voltages
T1OUT, T2OUT, Y, Z to GND......................................±13.2V
R2OUT, R1OUT, RO to GND................-0.3V to (VCC+ 0.3V)
Output Short-Circuit Duration
T1OUT, T2OUT, Y, Z............................................Continuous
Continuous Power Dissipation (TA= +70°C)
20-Pin SSOP (derate 11.9W/°C above +70°C)..........952mW
24-Pin SSOP (derate 14.9W/°C above +70°C)........1195mW
28-Pin SSOP (derate 15W/°C above +70°C)...........1201mW
Operating Temperature Ranges
MAX316_CA_....................................................0°C to +70°C
MAX316_EA_.................................................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s).................................+300°C
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
DC CHARACTERISTICSMAX3160/MAX3161, no load,
RS485/ RS232 = GND1.22.5
MAX3160/MAX3161, no load,
RS485/ RS232 = VCC2.55.5VCC Standby CurrentICC
MAX3162 No Load3.06
VCC Shutdown CurrentICCSHDN = GND, receiver inputs open or
grounded110µA
TRANSMITTER AND LOGIC INPUTS (DI, T1IN, T2IN, DE485, RRRREEEE444488885555, TE232, RRRREEEE222233332222, FAST, HDPLX, SHDN, RS485/RRRRSSSS222233332222)
Logic Input LowVIL0.8V
VCC = +3.3V2.0Logic Input HighVIHVCC = +5V2.4V
Logic Input Leakage CurrentIINL±0.01±1µA
Transmitter Logic HysteresisVHYS0.5V
RS-232 AND RS-485/422 RECEIVER OUTPUTS (R1OUT, R2OUT, RO)Receiver Output Voltage LowVOLIOUT = 2.5mA0.4V
Receiver Output Voltage HighVOHIOUT = -1.5mAVCC - 0.6V
Receiver Output Short Circuit
CurrentIOSR0 < VO < VCC±20±60mA
Receiver Output Leakage
CurrentIOZRReceivers disabled±0.05±1µA
MAX3160/MAX3161/MAX3162+3.0V to+5.5V, 1µA, RS-232/
RS-485/422 Multiprotocol Transceivers
Electrical Characteristics (continued)(VCC= +3V to +5.5V, C1–C4 = 0.1µF when tested at +3.3V ±10%; C1 = 0.047µF and C2, C3, C4 = 0.33µF when tested at +5V
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
RS-232 RECEIVER INPUTS (R1IN, R2IN)Input Voltage Range-2525V
VCC = +3.3V0.6Input Threshold LowVCC = +5V0.8V
VCC =+3.3V2.0Input Threshold HighVCC = +5V2.4V
Input Hysteresis0.5V
Input Resistance357kΩ
RS-485/422 RECEIVER INPUTS (NOTE 2)MAX316048
Input ResistanceRIN-7V < VCM < +12VMAX3161/
MAX316296kΩ
VCM = +12V0.25MAX3160VCM = -7V-0.15
VCM = +12V0.125
Input CurrentIIN
MAX3161/MAX3162VCM = -7V-0.075
Input Differential ThresholdVTH-200-50mV
Input HysteresisΔVTH30mV
RS-232 TRANSMITTER OUTPUTS (T1OUT, T2OUT)Output Voltage SwingBoth transmitter outputs loaded with 3kΩ
to GND±5±5.4V
Output ResistanceV C C = V + = V - = 0V , V T 1OU T = V T 2OU T = + 2V 30010MΩ
Output Short-Circuit CurrentT_OUT = GND±30±60mA
MAX3160/
MAX3161±125Output Leakage Current
VOUT = ±12V
TE232 = GND or SHDN =
GNDMAX3162±25
RS-485/422 TRANSMITTER OUTPUTS (Y, Z)R = 27Ω
(RS-485)1.5
Differential Output VoltageVODFigure 1
R = 50Ω
(RS-422)2
Change in Magnitude of
Differential Output Voltage for
Complementary Output States
ΔVODR = 27Ω or 50Ω, Figure 1-0.20.2V
Common Mode Output VoltageVOCR = 27Ω or 50Ω, Figure 13V
Change in Magnitude of
Common Mode Output Voltage
for Complementary Output
States
Δ VOCR = 27Ω or 50Ω, Figure 10.2V
MAX3160/MAX3161/MAX3162+3.0V to+5.5V, 1µA, RS-232/
RS-485/422 Multiprotocol Transceivers
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSOutput Short-Circuit CurrentISCVY or VZ = +12V to –7V±250mA
MAX3160/
MAX3161±125Output Leakage CurrentIO
VY or VZ = +12V,
DE485 = GND or SHDN =
GNDMAX3162±25
RS-232 TIMING CHARACTERISTICS (FAST = GND, 250kbps, ONE TRANSMITTER SWITCHING)Maximum Data RateRL = 3kΩ, CL = 1000pF250kbps
Receiver Propagation DelayR_IN to R_OUT, CL = 150pF0.15µs
Receiver Output Enable Time200ns
Receiver Output Disable Time200ns
Transmitter Skew|tPHL - tPLH|100ns
Receiver Skew|tPLH - tPHL|50ns
CL = 150pF
to 1000pF630
Transition-Region Slew Rate
VCC = +3.3V, TA = +25°C,
RL =3kΩ to 7kΩ, measured
from +3.0V or –3.0V to
+3.0V
CL = 150pF
to 2500pF430
V/µs
RS-232 TIMING CHARACTERISTICS (FAST = VCC, 1Mbps, ONE TRANSMITTER SWITCHING)VCC = +3V to +4.5V, RL = 3kΩ, CL = 250pF1
Maximum Data RateVCC = +4.5V to +5.5V, RL = 3kΩ,
CL = 1000pF1Mbps
Receiver Propagation DelayR_IN to R_OUT, CL = 150pF0.15µs
Receiver Output Enable Time200ns
Receiver Output Disable Time200ns
Transmitter Skew|tPHL - tPLH|25ns
Receiver Skew|tPLH - tPHL|50ns
Transition-Region Slew Rate
VCC = +3.3V, TA = +25°C, RL =3kΩ to 7kΩ,
CL = 150pF to 1000pF, measured from
+3.0V or –3.0V to +3.0V150V/μs
RS-485/422 TIMING CHARACTERISTICS (FAST = GND) 250kbpsDriver Propagation DelaytDPHL,
tDPLHRDIFF = 54Ω, CL = 50pF, Figures 3, 5200400800ns
Driver Rise and Fall TimetDPHL,
tDPLHRDIFF = 54Ω, CL = 50pF, Figures 3, 5200400800ns
Driver Propagation Delay SkewtDSKEWRDIFF = 54Ω, CL = 50pF, Figure 3, 5200ns
Driver Output Enable TimetDZH, tRZLRDIFF = 54Ω, CL = 50pF, Figures 4, 6400800ns
Driver Output Disable TimetDLZ, tDHZRDIFF = 54Ω, CL = 50pF, Figure 4, 6200400ns
Receiver Propagation DelaytRPLH,
tRPHLCL = 15pF, Figures 7, 92580150ns
Receiver Propagation Delay
SkewtRSKEWCL = 50pF, Figures 7, 910ns
Electrical Characteristics (continued)(VCC= +3V to +5.5V, C1–C4 = 0.1µF when tested at +3.3V ±10%; C1 = 0.047µF and C2, C3, C4 = 0.33µF when tested at +5V
±10%; TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
MAX3160/MAX3161/MAX3162+3.0V to+5.5V, 1µA, RS-232/
RS-485/422 Multiprotocol Transceivers
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSReceiver Output Enable TimetRZL, tRZHCL = 50pF, Figures 2, 8100ns
Receiver Output Disable TimetRLZ, tRHZCL = 50pF, Figures 2, 8100ns
RS-485/RS-422 TIMING CHARACTERISTICS (FAST = VCC, 10Mbps)Driver Propagation DelaytDPHL,
tDPLHRDIFF = 54Ω, CL = 50pF, Figures 3, 560120ns
Driver Rise And Fall TimestDR, tDFRDIFF = 54Ω, CL = 50pF, Figures 3, 51025ns
Driver Propagation Delay SkewtDSKEWRDIFF = 54Ω, CL = 50pF, Figures 3, 510ns
Driver Output Enable TimetDZLRDIFF = 54Ω, CL = 50pF, Figures 4, 6400800ns
Driver Output Disable TimetDLZ, tDHZRDIFF = 54Ω, CL = 50pF, Figures 4, 6200400ns
Receiver Propagation DelaytRPLH,
tRPHLCL = 15pF, Figures 7, 980150ns
Receiver Propagation Delay
SkewtRSKEWCL = 50pF, Figures 7, 910ns
Receiver Output Enable TimetRZL, tRZHCL = 50pF, Figures 2, 8100ns
Receiver Output Disable TimetRLZ, tRHZCL = 15pF, Figures 2, 8100ns
Electrical Characteristics (continued)(VCC= +3V to +5.5V, C1–C4 = 0.1µF when tested at +3.3V ±10%; C1 = 0.047µF and C2, C3, C4 = 0.33µF when tested at +5V
±10%; TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
Typical Operating Characteristics(VCC= +3.3V, 250kbps data rate, 0.1µF capacitors, all RS-232 transmitters (RS-232 mode) loaded with 3kΩto ground, TA= +25°C,
RS-232 TRANSMITTER OUTPUT VOLTAGE vs.
LOAD CAPACITANCE (FAST = GND)
MAX3160/2 TOC1
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (V)
RS-232 TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE (FAST = VCC)
MAX3160/2 TOC2
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (V)20001000300040005000
RS-232 TRANSMITTER SLEW RATE vs.
LOAD CAPACITANCE (FAST = GND)MAX3160/2 TOC3
LOAD CAPACITANCE (pF)
SLEW RATE (V/
Note 2:Applies to A, B for MAX3162 and MAX3160/MAX3161 with HDPLX = GND, or Y, Z for MAX3160/MAX3161 with HDPLX = VCC.
MAX3160/MAX3161/MAX3162+3.0V to+5.5V, 1µA, RS-232/
RS-485/422 Multiprotocol Transceivers
SHUTDOWN CURRENT vs. TEMPERATURE
MAX3160/2 TOC7
TEMPERATURE (°C)
SHUTDOWN CURRENT (nA)
RS-485/422 OUTPUT CURRENT vs.
DRIVER OUTPUT VOLTAGE
MAX3160/2 TOC8
OUTPUT LOW VOLTAGE (V)
OUTPUT CURRENT (mA)
RS-485/422 OUTPUT CURRENT vs.
DRIVER OUTPUT HIGH VOLTAGE
MAX3160/2 TOC9
OUTPUT HIGH VOLTAGE (V)
OUTPUT CURRENT (mA)
RS-485/422 DRIVER OUTPUT CURRENT vs.
DIFFERENTIAL OUTPUT VOLTAGE
MAX3160/2 TOC10
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
RS-485/422 DRIVER DIFFERENTIAL OUTPUT
vs. TEMPERATURE
MAX3160/2 TOC11
OUTPUT VOLTAGE (V)
R = 50Ω1.52.00.51.02.53.03.5
OUTPUT CURRENT vs. RECEIVER
OUTPUT LOW VOLTAGEMAX3160/2 TOC12
OUTPUT CURRENT (mA)
Typical Operating Characteristics (continued)(VCC= +3.3V, 250kbps data rate, 0.1µF capacitors, all RS-232 transmitters (RS-232 mode) loaded with 3kΩto ground, TA= +25°C,
unless otherwise noted.)
RS-232 TRANSMITTER SLEW RATE
vs. LOAD CAPACITANCE (FAST = VCC)
MAX3160/2 TOC4
LOAD CAPACITANCE (pF)
SLEW RATE (V/20001000300040005000
OPERATING SUPPLY CURRENT vs.
LOAD CAPACITANCE WHEN
TRANSMITTING DATA (RS-232 MODE)MAX3160/2 TOC5
LOAD CAPACITANCE (pF)
SUPPLY CURRENT (mA)
1Mbps
250kbps
20kbps
MAX3160/MAX3161
NO-LOAD SUPPLY CURRENT vs.
TEMPERATURE
MAX3160/2 TOC6
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
RS-485 MODE
RS-232 MODE
MAX3160/MAX3161/MAX3162+3.0V to+5.5V, 1µA, RS-232/
RS-485/422 Multiprotocol Transceivers
RS-485/422 RECEIVER PROPAGATION DELAY
vs. TEMPERATURE
MAX3160/2 TOC16
TEMPERATURE (°C)
PROPAGATION DELAY (ns)
CL = 50pF
RISING
FALLING
RS-485/422 DRIVER PROPAGATION DELAY
vs.TEMPERATURE (FAST)
MAX3160/2 TOC18
TEMPERATURE (°C)
R = 50Ω
TIME (ns)
RS-485/422 DRIVER PROPAGATION DELAY
vs. TEMPERATURE (SLOW)
MAX3160/2 TOC19
TEMPERATURE (°C)
TIME (ns)
R = 50Ω
RS-485/422 DRIVER PROPAGATION
(FAST, 10Mbps)MAX3160/2 TOC20
DI
5V/div
VY-VZ
2V/div
20ns/div1.0µs/div
MAX3160/2 TOC21
DI
5V/di
VY-V
2V/d
RS-485/422 DRIVER PROPAGATION
(FAST, 10Mbps)
RS-485/422 RECEIVER PROPAGATION
(FAST, 5Mbps)MAX3160/2 TOC22
VY-VZ
2V/div
2V/div
CL = 50pF
40ns/div
RS-485/422 DRIVER DISABLE/ENABLE
TO DRIVER OUTPUTMAX3160/2 TOC24
DE48
2V/d
VY - V
2V/d
R = 50Ω
CL = 82pF
100ns/div1.01.50.52.02.53.03.5
OUTPUT CURRENT vs. RECEIVER
OUTPUT HIGH VOLTAGEMAX3160/2 TOC13
OUTPUT HIGH VOLTAGE (V)
OUTPUT CURRENT (mA)
Typical Operating Characteristics (continued)(VCC= +3.3V, 250kbps data rate, 0.1µF capacitors, all RS-232 transmitters (RS-232 mode) loaded with 3kΩto ground, TA= +25°C,
unless otherwise noted.)
I-V OUTPUT IMPEDANCE CURVE
IN RS-232 SHUTDOWN MODE
MAX3160-A
VOLTS (V)
CURRENT (
MAX3160/MAX3161/MAX3162+3.0V to+5.5V, 1µA, RS-232/
RS-485/422 Multiprotocol Transceivers
Pin Description
PIN
MAX3160MAX3161MAX3162NAMEFUNCTION11C1+Positive Terminal of the Positive Flying Capacitor
222VCCPositive Supply Voltage33C1-Negative Terminal of the Positive Flying Capacitor44GNDGround55T1OUTRS-232 Driver Output——Z(B)/T1OUT
Inverting RS-485/422 Driver Output in Full-Duplex Mode
(and Inverting RS-485/422 Receiver Input in Half-Duplex
Mode)/RS-232 Driver Output—6ZInverting RS-485/422 Driver Output6—Z(B)
Inverting RS-485/422 Driver Output in Full-Duplex Mode
(and Inverting RS-485/422 Receiver Input in Half-Duplex
Mode)——Y(A)/T2OUT
Noninverting RS-485/422 Driver Output in Full-Duplex
Mode (and Noninverting RS-485/422 Receiver Input in
Half-Duplex Mode)/RS-232 Driver Output—7YNoninverting RS-485/422 Driver Output7—Y(A)
Noninverting RS-485/422 Driver Output in Full-Duplex
Mode (and Noninverting RS-485/422 Receiver Input in
Half-Duplex Mode)99R1OUTRS-232 Receiver Output88T2OUTRS-232 Driver Output10—RO/R2OUTRS-485/422 Receiver Output/RS-232 Receiver Output
91113SHDNActive-Low Shutdown-Control Input. Drive low to shut
down transmitters and charge pump.—10R2OUTRS-232 Driver Output1214FASTSelect slew rate limiting for both RS-232 and RS-
485/422. Slew rate limits with a logic-level low.—11RORS-485/422 Receiver Output13—RS485/RS232
Software-Programmable Pin Functionality. Operates as
RS-485/422 with a logic-level high; operates as RS-232
with a logic-level low.12RE485RS-485/422 Receiver Enable. Logic-level low enables
RS-485/422 receivers.14—HDPLX
Software-Programmable Pin Functionality. Operates in
full-duplex mode when low; operates in half-duplex
mode when high.
MAX3160/MAX3161/MAX3162+3.0V to+5.5V, 1µA, RS-232/
RS-485/422 Multiprotocol Transceivers
Pin Description (continued)
PIN
MAX3160MAX3161MAX3162NAMEFUNCTION——A/R2INNoninverting RS-485/422 Receiver Input/RS-232
Receiver Input——B/R1INInverting RS-485/422 Receiver Input/RS-232 Receiver
Input15RE232RS-232 Receiver Enable. Logic-level low enables RS-
232 receivers.1517ANoninverting RS-485/422 Receiver Input19—DE485/T2INRS-485/RS-422 Driver Enable/RS-232 Driver Input—16TE232RS-232 Transmitter Output Enable1618BInverting RS-485/422 Receiver Input20—DI/T1INRS-485/RS-422 Driver Input/RS-232 Driver Input1719R2INRS-232 Receiver Input2125V-Negative Charge-Pump Rail1820R1INRS-232 Receiver Input2226C2-Negative Terminal of the Negative Flying Capacitor2327C2+Positive Terminal of the Negative Flying Capacitor2428V+Positive Charge-Pump Rail—21T2INRS-232 Driver Input—22DE485RS-485/RS-422 Driver Enable—23DIRS-485/RS-422 Driver Input—24T1INRS-232 Driver Input
MAX3160/MAX3161/MAX3162+3.0V to+5.5V, 1µA, RS-232/
RS-485/422 Multiprotocol Transceivers
RS-232
OUTPUTSLOGIC
INPUTS
LOGIC
OUTPUTSRS-232
INPUTSC3
SHDNHDPLX
FASTRS485/RS2329
C2+
C2-
C1-
GND
VCC
VCC
C1+
CHARGE
PUMP
CBYPASS
RS-232 MODE10
RS-485
OUTPUTS
LOGIC
INPUTS
LOGIC
OUTPUT
RS-485
INPUTS
SHDN
FASTRS485/RS232
C2+
C2-
C1-
GND
VCC
VCC
C1+
CBYPASS
CHARGE
PUMP
RS-485 MODE
HALF/FULL
DUPLEXR0
Functional Diagrams
MAX3160
MAX3160/MAX3161/MAX3162+3.0V to+5.5V, 1µA, RS-232/
RS-485/422 Multiprotocol Transceivers
Functional Diagrams (continued)CBYPASS
RS-485
OUTPUTS
LOGIC
INPUTS
LOGIC
OUTPUT
RS-485
INPUTS
SHDN
FASTRS485/RS232
C2+
C2-
C1-
GND
VCC
VCC
C1+
CHARGE
PUMP
RS-485 MODE
HALF/FULL
DUPLEXR0
RS-232
OUTPUT
RS-232
OUTPUT
LOGIC
INPUTS
LOGIC
OUTPUTS
RS-232
INPUTSC3
SHDNHDPLX
FASTRS485/RS232
C2+
C2-
C1-
GND
VCC
VCC
C1+
CHARGE
PUMP
CBYPASS
RS-232 MODE
MAX3161
MAX3160/MAX3161/MAX3162+3.0V to+5.5V, 1µA, RS-232/
RS-485/422 Multiprotocol Transceivers
TE232
RE485
RS-485
OUTPUTS
RS-232
OUTPUT
RS-232
OUTPUT
LOGIC
OUTPUTS
RS-232
INPUTSC3
SHDN
FAST
C2+
C2-
C1-
GND
VCC
VCCC1+
CHARGE
PUMP
LOGIC
INPUTS
RS-485
INPUTSDE485
CBYPASS
Functional Diagrams (continued)
MAX3162RDIFFVOD
DE485DI
Figure 3. RS-485/422 Driver Timing Test Circuit
VCC
TEST POINTRECEIVER
OUTPUTS1
Figure 2. RS-485/422 Receiver Enable/Disable Timing Test Load
Figure 1. RS-485/422 Driver DCTest Load
VOD
VOCR
Test Circuits
