MAX3313EEUB+T ,±15kV ESD-Protected, 460kbps, 1µA, RS-232-Compatible Transceivers in µMAXfeatures a 1μA shutdown mode. Inshutdown the device turns off the charge pump, pullsOrdering Inform ..
MAX3313EUB+ ,±15kV ESD-Protected, 460kbps, 1µA, RS-232-Compatible Transceivers in µMAXMAX3311E/MAX3313E19-1910; Rev 0; 1/01±15kV ESD-Protected, 460kbps, 1μA,RS-232-Compatible Transceive ..
MAX3313EUB+T ,±15kV ESD-Protected, 460kbps, 1µA, RS-232-Compatible Transceivers in µMAXApplicationsDigital CamerasPDAsTypical Operating CircuitGPSPOS+5VTelecommunicationsCBYPASS10.1μFHan ..
MAX3314ECSA+ ,±15kV ESD-Protected, 460kbps, 1µA, RS-232-Compatible TransceiverMAX3314E19-1696; Rev 1; 3/01±15kV ESD-Protected, 460kbps, 1µA, RS-232-Compatible Transceiver
MAX3314EEUA ,【15kV ESD-Protected, 460kbps, 1レA, RS-232-Compatible TransceiverApplications MAX3314ECKA-T 0°C to +70°C 8 SOT23-8 MAX3314ECUA 0 °C to +70°C 8 µ MAXDigital Cameras ..
MAX3314EEUA+ ,±15kV ESD-Protected, 460kbps, 1µA, RS-232-Compatible TransceiverFeaturesThe MAX3314E is a ±5V-powered EIA/TIA-232-compat-♦ ESD Protection for RS-232 I/O Pinsible i ..
MAX6960EVCMODU ,Evaluation Kit/Evaluation System for the MAX6960features.♦ Fully Assembled and TestedThe MAX6960 evaluation system (EV system) consists♦ EV System ..
MAX6964AEG+ ,17-Output LED Driver/GPO with Intensity Control and Hot-Insertion ProtectionFeatures2♦ 400kbps, 2-Wire Serial Interface, 5.5V TolerantThe MAX6964 I C-compatible serial interfa ..
MAX6964ATG ,17- OUTPUT LED DRIVER/GPOMAX696419-3179; Rev 0; 1/0417- LED/GPO____________ ____________TM2MAX6964 I C♦ 400kbps, 2- , 5.5V 1 ..
MAX6964ATG+ ,17-Output LED Driver/GPO with Intensity Control and Hot-Insertion ProtectionMAX696419-3179; Rev 3; 3/0517-Output LED Driver/GPO with Intensity Control and Hot-Insertion Protec ..
MAX6965AEE+ ,9-Output LED Driver with Intensity Control and Hot-Insertion ProtectionApplications0.047µFLCD BacklightsLED Status Indication V+Keypad BacklightsµCMAX6965RGB LED Drivers ..
MAX6965AEE+ ,9-Output LED Driver with Intensity Control and Hot-Insertion ProtectionMAX696519-3058; Rev 3; 3/059-Output LED Driver with Intensity Control and Hot-Insertion Protection
MAX3311ECUB+-MAX3311EUB+-MAX3311EUB+T-MAX3313ECUB+-MAX3313ECUB+T-MAX3313EEUB+-MAX3313EEUB+T-MAX3313EUB+-MAX3313EUB+T
±15kV ESD-Protected, 460kbps, 1µA, RS-232-Compatible Transceivers in µMAX
neral DescriptionThe MAX3311E/MAX3313E are low-power, 5V EIA/TIA-
232-compatible transceivers. All transmitter outputs
and receiver inputs are protected to ±15kV using the
Human Body Model, making these devices ideal for
applications where more robust transceivers are
required.
Both devices have one transmitter and one receiver.
The transmitters have a proprietary low-dropout trans-
mitter output stage enabling RS-232-compatible opera-
tion from a +5V supply with a single inverting charge
pump. These transceivers require only three 0.1μF
capacitors and will run at data rates up to 460kbps
while maintaining RS-232-compatible output levels.
The MAX3311E features a 1μA shutdown mode. In
shutdown the device turns off the charge pump, pulls
V- to ground, and the transmitter output is disabled.
The MAX3313E features an INVALIDoutput that asserts
high when an active RS-232 cable signal is connected,
signaling to the host that a peripheral is connected to
the communication port.
________________________ApplicationsDigital Cameras
PDAs
GPS
POS
Telecommunications
Handy Terminals
Set-Top Boxes
FeaturesESD Protection for RS-232-Compatible I/O Pins
±15kV—Human Body Model1μA Low-Power Shutdown (MAX3311E)INVALID
Output (MAX3313E)Receiver Active in Shutdown (MAX3311E)Single Transceiver (1Tx/1Rx) in 10-Pin μMAX
Package15kV ESD-Protected, 460kbps, 1μA,
RS-232-Compatible Transceivers in μM
Pin Configurations19-1910; Rev 0; 1/01
Ordering InformationGND
C1+
TOUTTIN
SHDN
C1-
VCC
MAX3311E
μMAX
TOP VIEW
RINROUT
PART TEMP. RANGE PIN-PACKAGEMAX3311ECUB 0°C to +70°C 10 μMAXMAX3311EEUB -40°C to +85°C 10 μMAX
MAX3313ECUB 0°C to +70°C 10 μMAXMAX3313EEUB -40°C to +85°C 10 μMAX
0.1μF
0.1μF
CBYPASS
0.1μF8
C1+V-
TOUT
RIN
C1-
TIN
ROUT
VCC
GND
SHDN (MAX3311E)
INVALID (MAX3313E)
+5V
MAX3311E
MAX3313E
CAPACITORS MAY BE POLARIZED OR NONPOLARIZED.
Typical Operating CircuitPin Configurations continued at end of data sheet.
15kV ESD-Protected, 460kbps, 1μA,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_ECUB.................................................0°C to +70°C
MAX331_EEUB..............................................-40°C to +85°C
Junction Temperature.....................................................+150°C
Storage Temperature Range............................-65°C to +150°C
Lead Temperature (soldering, 10s)................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITSDC CHARACTERISTICS Supply Operation Range VCC 4.5 5 5.5 VSupply Current SHDN = VCC, no load 100 250 μAShutdown Supply Current SHDN = GND (MAX3311E only) 1 10 μA
LOGIC 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 μA
RECEIVER OUTPUTOutput Voltage Low VOL IOUT = 1.6mA 0.4 VOutput Voltage High VOH IOUT = -1.0mA VCC - 0.6 VCC - 0.1 VINVALID OUTPUT (MAX3313E only) Figure 7, positive threshold 2.7 Receiver Input Threshold toINVALID Output High Figure 7, negative threshold -2.7 VReceiver Input Threshold toINVALID Output Low Figure 7 -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 NegativeThresholds to INVALID High Figure 7 0.1 μsReceiver Positive or Negative
Threshold to INVALID Low Figure 7 30 μs
15kV ESD-Protected, 460kbps, 1μA,RS-232-Compatible Transceivers in μMAX
ELECTRICAL CHARACTERISTICS (continued)(VCC= +5V, C1 and C2 = 0.1μF, TA= TMINto TMAX. Typical values are at TA= +25°C.)
TIMING CHARACTERISTICS(VCC= +5V, C1 and C2 = 0.1μF, TA= TMINto TMAX. Typical values are at TA= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITSRECEIVER INPUT Input Threshold Low VIL 0.8 VInput Threshold High VIH 2.4 VInput Hysteresis 0.5 VInput Resistance 5 kΩ
TRANSMITTER OUTPUT Output Voltage Swing Tr ansm i tter outp ut l oad ed w i th 3kΩ to ±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
ESD PERFORMANCE (TRANSMITTER OUTPUT, RECEIVER INPUT) ESD-Protection Voltage Human Body Model ±15 kV
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITSMaximum Data Rate RL = 3kΩ, CL = 1000pF 460 kbpsReceiver Propagation Delay tPLH/tPHL Receiver input to receiver output,
CL = 150pF 0.15 μsTransmitter Skew 100 nsReceiver Skew 50 nsTransition Region Slew Rate RL = 3kΩ to 7kΩ, CL = 150pF to 1000pF,
measured from +3V to -3V or from -3V to +3V 11 V/μs
Note 1:Not tested—guaranteed by design.
15kV ESD-Protected, 460kbps, 1μA,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 CAPACITANCE3311E/13E-01
LOAD CAPACITANCE (pF)
(V
+SLEW
250 kbps DATA RATE
-SLEW50010001500200025003000
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCEAX3311E/13E-02
LOAD CAPACITANCE (pF)
(V
460kbps/250kbps/120kbps
460kbps/250kbps/120kbps10001500500200025003000
SUPPLY CURRENT
vs. LOAD CAPACITANCE3311E/13E-03
LOAD CAPACITANCE (pF)
(m
20kbps
120kbps
250kbps
460kbps
Pin Description
PIN
MAX3311EMAX3313E
NAMEFUNCTION1VCC+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 output6RIN±15kV ESD-Protected, RS-232 Receiver Input7TOUT±15kV ESD-Protected, RS-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
tailed DescriptionSingle Charge-Pump Voltage ConverterThe MAX3311E/MAX3313E 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 DriverThe 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 tri-state. The transmitter input does not have an
internal pullup resistor.
RS-232 ReceiverThe MAX3311E/MAX3313E receiver converts RS-232
signals to CMOS-logic output levels. The MAX3311E
receiver will remain active during shutdown mode. The
MAX3313E INVALIDindicates when an RS-232 signal
is present at the receiver input, and therefore when the
port is in use.
The MAX3313E INVALIDoutput is pulled low when no
valid RS-232 signal level is detected on the receiver
input.
MAX3311E Shutdown ModeIn 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 less than 25ms.
Applications Information
Capacitor SelectionThe 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
ShutdownFigure 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 MAX3311E
comes out of shutdown. Note that the transmitter is
enabled only when the magnitude of V- exceeds
approximately -3V.
High Data RatesThe MAX3311E/MAX3313E maintain RS-232-compati-
ble ±3.7V minimum transmitter output voltage even at
15kV ESD-Protected, 460kbps, 1μA,
RS-232-Compatible Transceivers in μMAX
Table 1. MAX3311E Shutdown Logic
Truth TableSHDN
TRANSMITTER
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
15kV ESD-Protected, 460kbps, 1μA,RS-232-Compatible Transceivers in μMAXhigh 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.
±15kV ESD ProtectionAs with all Maxim devices, ESD-protection structures
are incorporated on all pins to protect against electro-
static discharges encountered during handling and
assembly. The MAX3311E/MAX3313E driver outputs
and receiver inputs have extra protection against static
discharge. Maxim’s engineers have developed state-of-
the-art structures to protect these pins against ESD of
±15kV without damage. The ESD structures withstand
high ESD in all states: normal operation, shutdown, and
powered down. After an ESD event, Maxim’s E versions
keep working without latchup; whereas, competing
products can latch and must be powered down to
remove latchup.
ESD protection can be tested in various ways. The
transmitter outputs and receiver inputs of the product
family are characterized for protection to ±15kV using
the Human Body Model.
ESD Test ConditionsESD performance depends on a variety of conditions.
Contact Maxim for a reliability report that documents
test setup, test methodology, and test results.
Human Body ModelFigure 5 shows the Human Body Model, and Figure 6
shows the current waveform it generates when dis-
charged into low impedance. This model consists of a
100pF capacitor charged to the ESD voltage of interest,
which is then discharged into the test device through a
1.5kΩresistor.
Machine ModelThe Machine Model for ESD tests all pins using a
200pF storage capacitor and zero discharge resis-
tance. Its objective is to emulate the stress caused by
contact that occurs with handling and assembly during
manufacturing. Of course, all pins require this protec-
tion during manufacturing, not just RS-232 inputs and
outputs. Therefore, after PC board assembly, the
Machine Model is less relevant to I/O ports.
Figure 2. Loopback Test CircuitC2
0.1μF
TOUTTIN
ROUT
1000pF
RIN
VCC
GND
+5V
MAX3311E
MAX3313E
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
