MAX3311CUB+-MAX3311CUB+T-MAX3313CUB+ Fast Delivery |IC PHOENIX CO.,LIMITED

MAX3311CUB+T ,460kbps, 1µA Supply Current, RS-232-Compatible Transceivers in µMAXELECTRICAL CHARACTERISTICS(V = +5V, C1 and C2 = 0.1µF, T = T to T . Typical values are at T = +25°C ..
MAX3311ECUB+ ,±15kV ESD-Protected, 460kbps, 1µA, RS-232-Compatible Transceivers in µMAXApplicationsDigital CamerasPDAsTypical Operating CircuitGPSPOS+5VTelecommunicationsCBYPASS10.1μFHan ..
MAX3311ECUB+ ,±15kV ESD-Protected, 460kbps, 1µA, RS-232-Compatible Transceivers in µMAXapplications where more robust transceivers arerequired.♦ INVALID Output (MAX3313E)Both devices hav ..
MAX3311EEUB ,15kV ESD-Protected / 460kbps / 1A / RS-232-Compatible Transceivers in MAXApplicationsDigital CamerasPDAsTypical Operating CircuitGPSPOS+5VTelecommunicationsCBYPASS10.1µ FHa ..
MAX3311EUB ,460kbps / 1A Supply Current / RS-232-Compatible Transceivers in MAXFeaturesThe MAX3311/MAX3313 are low-power, +5V EIA/TIA- 1µA Low-Power Shutdown (MAX3311)232-compat ..
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MAX695CWE ,Microprocessor supervisory circuit.General Description The MAX690 Family of supervisory circuits reduce the complexity and number ..
MAX695CWE ,Microprocessor supervisory circuit.ELECTRICAL CHARACTERISTICS (Vcc = full operating range, VBATT = 2.8V, T, = 25°C, unless otherwis ..
MAX695CWE+ ,Microprocessor Supervisory CircuitsFeaturesThe MAX690 family of supervisory circuits reduces the ● Supervisory Function Integration Sa ..
MAX695CWE-T ,Microprocessor Supervisory CircuitsMAX690–MAX695 Microprocessor Supervisory Circuits
MAX695EPE ,Microprocessor Supervisory CircuitsFeatures . Precision Voltage Monitor 4.65V in MAX690, MAX691, MAX694 and MAX695 4.40V in MAX69 ..

MAX3311CUB+-MAX3311CUB+T-MAX3313CUB+
460kbps, 1µA Supply Current, RS-232-Compatible Transceivers in µMAX
GND
C1+
TOUTTIN
C1-
VCC
MAX3311
μMAX
TOP VIEW
RINROUT
SHDN
General Description
The MAX3311/MAX3313 are low-power, +5V EIA/TIA-
232-compatible transceivers. Both devices have one
transmitter and one receiver. The transceivers have a
proprietary low-dropout transmitter output stage
enabling RS-232-compatible operation from a +5V sup-
ply with a single inverting charge pump. These devices
require only three 0.1µF capacitors and will run at data
rates up to 460kbps while maintaining RS-232-compati-
ble output levels.
The MAX3311 features a 1µA shutdown mode. In shut-
down the device turns off the charge pump, pulls V- to
ground, and the transmitter output is disabled. The
MAX3313 features an INVALIDoutput that asserts high
when an active RS-232 cable signal is connected, sig-
naling to the host that a peripheral is connected to the
communication port.
________________________Applications
Digital Cameras
PDAs
GPS
POS
Telecommunications
Handy Terminals
Set-Top Boxes
Features1µA Low-Power Shutdown (MAX3311)INVALIDOutput (MAX3313)Receiver Active in Shutdown (MAX3311)Single Transceiver (1Tx/1Rx) in 10-Pin µMAXRS-232-Compatible Operation
MAX3311/MAX3313
460kbps, 1µA Supply Current,
RS-232-Compatible Transceivers in µMAX
Pin Configurations
19-1901; Rev 0; 2/01
Ordering InformationPART TEMP. RANGE PIN-PACKAGEMAX3311CUB 0°C to +70°C 10 µMAXMAX3311EUB -40°C to +85°C 10 µMAXMAX3313CUB 0°C to +70°C 10 µMAXMAX3313EUB -40°C to +85°C 10 µMAX
Pin Configurations continued at end of data sheet.
Typical Operating Circuit
0.1μF
0.1μF
CBYPASS
0.1μF
C1+V-
TOUT
C1-
TIN
RINROUT
VCC
GND
5kΩ
SHDN (MAX3311)
INVALID (MAX3313)
+5V
MAX3311
MAX3313
CAPACITORS MAY BE POLARIZED OR NONPOLARIZED.
MAX3311/MAX3313
460kbps, 1µA Supply Current,
RS-232-Compatible Transceivers in µMAX
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VCC= +5V, C1 and C2 = 0.1µF, TA= TMINto TMAX. 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.
VCCto GND..............................................................-0.3V to +6V
V- to GND.................................................................+0.3V to -7V
VCC+ |V-|.............................................................................+13V
Input Voltages
TIN, SHDNto GND.................................................-0.3V to +6V
RIN to GND........................................................................±25V
Output Voltages
TOUT to GND..................................................................±13.2V
ROUT, INVALIDto GND.......................…-0.3V to (VCC+ 0.3V)
Short-Circuit Duration
TOUT to GND...........................................................Continuous
Continuous Power Dissipation
10-Pin µMAX (derate 5.6mW/°C above +70°C).............444mW
Operating Temperature Ranges
MAX331_CUB.......................................................0°C to +70°C
MAX331_EUB....................................................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°CPARAMETERSYMBOL CONDITIONS MIN TYP MAX U N IT SDC CHARACTERISTICSSupply Operation Range VCC 4.5 5 5.5 VSupply Current SHDN = VCC, no load 100 250 μAShutdown Supply Current SHDN = GND (MAX3311 only) 1 10 μALOGIC INPUTS (TIN, SHDN) Input Logic Threshold Low VIL 0.8 VInput Logic Threshold High VIH 2.4 VTransmitter Input Hysteresis 0.5 VInput Leakage Current ±0.01 ±1 μARECEIVER OUTPUTOutput Voltage Low VOL IOUT = 1.6mA 0.4 VOutput Voltage High VOH IOUT = -1.0mA VCC -
0.6 VCC -
0.1 VINVALID OUTPUT (MAX3313 ONLY)Figure 5, positive threshold 2.7 Receiver Input Threshold to INVALID Output High Figure 5, negative threshold -2.7 VReceiver Input Threshold to INVALID Output Low Figure 5 -0.3 0.3 VINVALID Output Low VOL IOUT = 1.6mA 0.4 VINVALID Output High VOH IOUT = -1.0mA VCC - 0.6 VReceiver Positive or Negative Threshold to INVALID High Figure 5 0.1 μsReceiver Positive or Negative Threshold to INVALID Low Figure 5 30 μs
MAX3311/MAX3313
460kbps, 1µA Supply Current,
RS-232-Compatible Transceivers in µMAX
Note 1:Not tested—guaranteed by design.
TIMING CHARACTERISTICS
(VCC= +5V, C1 and C2 = 0.1µF, TA= TMINto TMAX. Typical values are at TA= +25°C.)PARAMETERSYMBOL CONDITIONS MIN TYP MAX U N IT SMaximum Data Rate RL = 3kΩ, C L = 1000p F 460 kbpsReceiver Propagation Delay tPLH, tPHL Recei ver i np ut to r ecei ver outp ut C L = 150p F 0.15 µsTransmitter Skew 100 nsReceiver Skew 50 nsTransition Region Slew Rate RL = 3kΩ to 7kΩ, CL = 150pF to 1000p F,easur ed from +3V to - 3V or fr om - 3V to + 3V 11 V/µs
ELECTRICAL CHARACTERISTICS (continued)
(VCC= +5V, C1 and C2 = 0.1µF, TA= TMINto TMAX. Typical values are at TA= +25°C.)PARAMETERSYMBOL CONDITIONS MIN TYP MAX U N IT SRECEIVER INPUTInput Threshold Low VIL 0.8 VInput Threshold High VIH 2.4 VInput Hysteresis 0.5 VInput Resistance 5 kΩTRANSMITTER OUTPUTOutput Voltage Swing Transmitter output loaded with 3kΩ to
ground ±3.7 VOutput Resistance (Note 1) VCC = 0, transmitter output = ±2V 300 ΩOutput Short-Circuit Current ±60 mAOutput Leakage Current VOUT = ±12V, transmitter disabled ±25 μA
MAX3311/MAX3313
460kbps, 1µA Supply Current,
RS-232-Compatible Transceivers in µMAX
Typical Operating Characteristics
(VCC= +5V, 0.1µF capacitors, transmitter loaded with 3kΩand CL, TA= +25°C, unless otherwise noted.) 10001500500200025003000
SLEW RATE
vs. LOAD CAPACITANCE
MAX3311/13 toc01
LOAD CAPACITANCE (pF)
SLEW RATE (V/
+SLEW
250 kbps DATA RATE
-SLEW50010001500200025003000
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3311/13 toc02
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (V)
460kbps/250kbps/120kbps
460kbps/250kbps/120kbps10001500500200025003000
SUPPLY CURRENT
vs. LOAD CAPACITANCE
MAX3311/13 toc03
LOAD CAPACITANCE (pF)
SUPPLY CURRENT (mA)
20kbps
120kbps
250kbps
460kbps
Pin Description
PIN
MAX3311MAX3313NAMEFUNCTIONVCC+5V External Power Supply. Decouple with a 0.1μF capacitor to ground.2C1-Negative Terminal of the Voltage Inverter Charge-Pump Capacitor—SHDNShutdown Active-Low (0 = off, 1 = on)3INVALIDValid Signal Detector Output, Active-Low. A logic high indicates that a valid
RS-232 level is present on the receiver input.4TINTTL/CMOS Transmitter Input5ROUTTTL/CMOS Receiver Output6RINRS-232 Receiver Input7TOUTRS-232-Compatible Transmitter Output8V--4.3V generated by the charge pump. Connect a 0.1μF capacitor to ground.9C1+Positive Terminal of the Voltage Inverter Charge-Pump Capacitor10GNDGround
MAX3311/MAX3313
460kbps, 1µA Supply Current,
RS-232-Compatible Transceivers in µMAX
Detailed Description
Single Charge-Pump Voltage Converter
The MAX3311/MAX3313 internal power supply has a
single inverting charge pump that provides a negative
voltage from a single +5V supply. The charge pump
operates in a discontinuous mode and requires a flying
capacitor (C1) and a reservoir capacitor (C2) to gener-
ate the V- supply.
RS-232-Compatible Driver
The transmitter is an inverting level translator that con-
verts CMOS-logic levels to EIA/TIA-232-compatible lev-
els. It guarantees data rates up to 460kbps with
worst-case loads of 3kΩin parallel with 1000pF. When
SHDNis driven low, the transmitter is disabled and put
into three state. The transmitter input does not have an
internal pullup resistor.
RS-232 Receiver
The MAX3311/MAX3313 receiver converts RS-232 sig-
nals to CMOS-logic output levels. The MAX3311 receiv-
er will remain active during shutdown mode. The
MAX3313 INVALIDindicates when an RS-232 signal is
present at the receiver input, and therefore when the
port is in use.
The MAX3313 INVALIDoutput is pulled low when no
valid RS-232 signal level is detected on the receiver
input.
MAX3311 Shutdown Mode
In shutdown mode, the charge pump is turned off, V- is
pulled to ground, and the transmitter output is disabled
(Table 1). This reduces supply current typically to 1µA.
The time required to exit shutdown is typically less than
100µs.
Applications Information
Capacitor Selection
The capacitor type used for C1 and C2 is not critical for
proper operation; either polarized or nonpolarized
capacitors are acceptable. If polarized capacitors are
used, connect polarity as shown in the Typical
Operating Circuit. The charge pump requires 0.1µF
capacitors. Increasing the capacitor values (e.g., by a
factor of 2) reduces power consumption. C2 can be
increased without changing C1’s value. However, do
not increase C1’s value without also increasing the
value of C2 and CBYPASSto maintain the proper ratios
(C1 to the other capacitors).
When using the minimum 0.1µF capacitors, make sure
the capacitance does not degrade excessively with
temperature. If in doubt, use capacitors with a larger
nominal value. The capacitor’s equivalent series resis-
tance (ESR) usually rises at low temperatures and influ-
ences the amount of ripple on V-.
To reduce the output impedance at V-, use larger
capacitors (up to 10µF).
Bypass VCCto ground with at least 0.1µF. In applica-
tions sensitive to power-supply noise generated by the
charge pump, decouple VCCto ground with a capaci-
tor the same size as (or larger than) charge-pump
capacitors C1 and C2.
Transmitter Output when Exiting
Shutdown
Figure 1 shows the transmitter output when exiting
shutdown mode. The transmitter is loaded with 3kΩin
parallel with 1000pF. The transmitter output displays no
ringing or undesirable transients as the MAX3311
comes out of shutdown. Note that the transmitter is
enabled only when the magnitude of V- exceeds
approximately -3V.
Table 1. MAX3311 Shutdown Logic Truth
Table
SHDNTRANSMITTER
OUTPUT
RECEIVER
OUTPUT
CHARGE
PUMPHigh ZActiveInactiveActiveActiveActiveFigure 1. Transmitter Output when Exiting Shutdown or
Powering Up
10μs/div
SHDN
TOUT
5V/div
1.5V/div
TIN = GND
TIN = VCC
MAX3311/MAX3313
High Data Rates
The MAX3311/MAX3313 maintain RS-232-compatible
transmitter output voltage (±3.7V minimum) even at
high data rates. Figure 2 shows a transmitter loopback
test circuit. Figure 3 shows the loopback test result at
120kbps, and Figure 4 shows the same test at
250kbps.
460kbps, 1µA Supply Current,
RS-232-Compatible Transceivers in µMAX
Figure 2. Loopback Test CircuitC2
0.1μF
TOUTTIN
ROUT
1000pF
RIN
VCC
GND
5kΩ
+5V
MAX3311
MAX3313
C1+
C1-
Figure 4. Loopback Test Results at 250kbps
2μs/div
TOUT
TIN
ROUT
Figure 3. Loopback Test Results at 120kbps
5μs/div
TOUT
TIN
ROUT
Figure 5. Receiver Positive/Negative Thresholds for INVALID
RECEIVER INPUT LEVELS
-2.7V
-0.3V
+2.7V
+0.3V
INDETERMINATE
INVALID HIGH
INVALID LOW
INVALID HIGH
INDETERMINATE

Partno	Mfg	Dc	Qty	Available	Descript
MAX3311CUB+ \|MAX3311CUB	MAXIM	N/a	100	avai	460kbps, 1µA Supply Current, RS-232-Compatible Transceivers in µMAX
MAX3311CUB+T	MAXIM	N/a	2000	avai	460kbps, 1µA Supply Current, RS-232-Compatible Transceivers in µMAX
MAX3313CUB+ \|MAX3313CUB	MAXIM	N/a	180	avai	460kbps, 1µA Supply Current, RS-232-Compatible Transceivers in µMAX