MAX3317ECAP ,【15kV ESD-Protected, 2.5V, 1レA, 460kbps, RS-232 Compatible TransceiversApplications C1+ 2 19 VCCV+ 3 18 GNDPalmtop ComputersC1- 4 17 T1OUTHand-Held InstrumentsMAX3318EC2+ ..
MAX3317EEAP ,【15kV ESD-Protected, 2.5V, 1レA, 460kbps, RS-232 Compatible Transceiversfeatures a 1µA shutdown mode thatMAX3318EEUP -40°C to +85°C 20 TSSOPcan be entered by driving SHDN ..
MAX3317EEUP+ ,±15kV ESD-Protected, 2.5V, 1µA, 460kbps, RS-232-Compatible TransceiversGeneral Description ________
MAX3318CDBRG4 ,2.5-V 460-Kbps RS-232 Transceiver With +/-15 KV ESD Protection 20-SSOP 0 to 70This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated cir ..
MAX3318EAP+ ,±15kV ESD-Protected, 2.5V, 1µA, 460kbps, RS-232-Compatible Transceiversfeatures a 1µA shutdown mode thatMAX3318EEUP -40°C to +85°C 20 TSSOPcan be entered by driving SHDN ..
MAX3318ECUP+ ,±15kV ESD-Protected, 2.5V, 1µA, 460kbps, RS-232-Compatible TransceiversELECTRICAL CHARACTERISTICS(V = +2.25V to +3.0V, C1–C4 = 0.1µF, T = T to T , unless otherwise noted. ..
MAX6966AEE+ ,10-Port Constant-Current LED Drivers and I/O Expanders with PWM Intensity ControlFeaturesThe MAX6966/MAX6967 serial-interfaced peripherals♦ High-Speed 26MHz SPI-™/QSPI-™/MICROWIRE™ ..
MAX6966AEE+ ,10-Port Constant-Current LED Drivers and I/O Expanders with PWM Intensity ControlFeaturesThe MAX6966/MAX6967 serial-interfaced peripherals♦ High-Speed 26MHz SPI-™/QSPI-™/MICROWIRE™ ..
MAX6966ATE+ ,10-Port Constant-Current LED Drivers and I/O Expanders with PWM Intensity ControlEVALUATION KIT AVAILABLEMAX6966/MAX696710-Port Constant-Current LED Drivers and I/OExpanders with P ..
MAX6967AEE+ ,10-Port Constant-Current LED Drivers and I/O Expanders with PWM Intensity ControlELECTRICAL CHARACTERISTICS(Typical Operating Circuit, V+ = 2.25V to 3.6V, T = T to T , unless other ..
MAX6968AAE ,8-Port, 5.5V Constant-Current LED DriverFeaturesThe MAX6968 serial-interfaced LED driver provides♦ 25Mb Industry-Standard 4-Wire Serial Int ..
MAX6968AUE+ ,8-Port, 5.5V Constant-Current LED DriverFeaturesOUT2 7 10 OUT5Architectural LightingOUT3 8 9 OUT4TSSOP/PDIP/SSOP____ Maxim Integrated Produ ..
MAX3316EEAE-MAX3317ECAP-MAX3317EEAP-MAX3318EEUP-MAX3319EEAE
【15kV ESD-Protected, 2.5V, 1レA, 460kbps, RS-232 Compatible Transceivers
_______________General DescriptionThe MAX3316E–MAX3319E are 2.5V powered RS-232
compatible transceivers. These devices feature shut-
down (MAX3317E), AutoShutdown Plus™ (MAX3318E/
MAX3319E), and enhanced electrostatic discharge
(ESD) protection integrated into the chip. All transmitter
outputs and receiver inputs are protected to ±15kV
using the IEC 1000-4-2 Air-Gap Discharge method,
±8kV using the IEC 1000-4-2 Contact Discharge
method, and ±15kV using the Human Body Model.
All devices are guaranteed at a data rate of 460kbps.
The transceivers have a proprietary low-dropout trans-
mitter output stage enabling RS-232 compatible opera-
tion from a +2.25V to +3.0V supply with a dual charge
pump. The charge pump requires only four 0.1µF
capacitors. The MAX3318E/MAX3319E feature a logic-
level output (READY) that asserts when the charge
pump is regulating and the device is ready to begin
transmitting.
The MAX3318E/MAX3319E achieve a 1µA supply current
using Maxim’s revolutionary AutoShutdown Plus feature.
These devices automatically enter a low-power shut-
down mode when the RS-232 cable is disconnected or
the transmitters of the connected peripherals are inactive
for more than 30 seconds. They turn on again when
they sense a valid transition at any transmitter or receiver
input. AutoShutdown Plus saves power without
changes to the existing BIOS or operating system. The
MAX3317E also features a 1µA shutdown mode that
can be entered by driving SHDNlow. The MAX3317E’s
receivers remain active while in shutdown mode, allowing
external devices such as modems to be monitored
using only 1µA supply current.
These devices are available in space-saving packages:
MAX3316E (16-pin SSOP and 20-pin TSSOP), MAX3317E/
MAX3318E (20-pin SSOP and 20-pin TSSOP), and
MAX3319E (16-pin SSOP).
________________________ApplicationsPalmtop Computers
Hand-Held Instruments
Pagers
Cellular Phones
GPS
Handy Terminals
Hand-Held Electronic Books
____________________________FeaturesESD Protection for RS-232 I/O Pins
±15kV—Human Body Model
±8kV—IEC 1000-4-2, Contact Discharge
±15kV—IEC 1000-4-2, Air-Gap Discharge300µA Operating Supply Current1µA Low-Power Shutdown with Receivers ActiveGuaranteed 460kbps Data RateGuaranteed 4V/µs Slew RateRS-232 Compatible Down to 2.25V
MAX3316E–MAX3319E
±15kV ESD-Protected, 2.5V, 1µA, 460kbps,
RS-232 Compatible Transceivers
Pin Configurations19-1616; Rev 0; 1/00
Ordering Information
Selector Guide and Typical Application Circuits appear at
end of data sheet.AutoShutdown Plus is a trademark of Maxim Integrated Products.
±15kV ESD-Protected, 2.5V, 1µA, 460kbps,
RS-232 Compatible Transceivers
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VCC= +2.25V to +3.0V, C1–C4 = 0.1µF, TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC= +2.5V,= +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 (Note 1)..................................................-0.3V to +7V
V- to GND (Note 1)...................................................-7V to +0.3V
V+ + |V-| (Note 1).................................................................+13V
Input Voltages
T_IN, EN, SHDN, FORCEON,
FORCEOFFto GND...............................................-0.3V to +6V
R_IN to GND..................................................................±25V
Output Voltages
T_OUT to GND............................................................±13.2V
R_OUT, INVALID, READY to GND.......-0.3V to (VCC+ 0.3V)
Short-Circuit Duration, T_OUT to GND.......................Continuous
Continuous Power Dissipation (TA= +70°C)
16-Pin SSOP (derate 7.14mW/°C above +70°C).......571mW
20-Pin SSOP (derate 8.00mW/°C above +70°C).......640mW
20-Pin TSSOP (derate 7.00mW/°C above +70°C).....559mW
Operating Temperature Range
MAX331_EC_ _.................................................0°C to +70°C
MAX331_EE_ _..............................................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
Note 1:V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
MAX3316E–MAX3319E
MAX3316E–MAX3319E
±15kV ESD-Protected, 2.5V, 1µA, 460kbps,
RS-232 Compatible Transceivers
ELECTRICAL CHARACTERISTICS (continued)(VCC= +2.25V to +3.0V, C1–C4 = 0.1µF, TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC= +2.5V,= +25°C.)
TIMING CHARACTERISTICS(VCC= +2.25V to +3.0V, C1–C4 = 0.1µF, TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC= +2.5V,= +25°C.)
MAX3316E–MAX3319E
±15kV ESD-Protected, 2.5V, 1µA, 460kbps,
RS-232 Compatible Transceivers
Typical Operating Characteristics(VCC= +2.5V, C1–C4 = 0.1µF, 460kbps data rate, all transmitters loaded with 3kΩ, TA= +25°C, unless otherwise noted.)
TIMING CHARACTERISTICS (continued)(VCC= +2.25V to +3.0V, C1–C4 = 0.1µF, TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC= +2.5V,= +25°C.)
Note 2:A transmitter/receiver edge is defined as a transition through the transmitter/receiver input logic thresholds.
Note 3:Transmitter skew is measured at the transmitter zero crosspoints.
MAX3316E–MAX3319E
±15kV ESD-Protected, 2.5V, 1µA, 460kbps,
RS-232 Compatible TransceiversMAX3318E/MAX3319E
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX3316E TOC06
VCC (V)
SUPPLY CURRENT (mA)
MAX3318E/MAX3319E
TRANSMITTER OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE
MAX3316E TOC07
VCC (V)
TRANSMITTER OUTPUT VOLTAGE (V)100020003000
MAX3318E/MAX3319E
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCEMAX3316E TOC08
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (V)
MAX3318E/MAX3319E
SLEW RATE vs. LOAD CAPACITANCEMAX3316E TOC09
LOAD CAPACITANCE (pF)
SLEW RATE (V/2000100030000
MAX3318E/MAX3319E
OPERATING SUPPLY CURRENT
vs. LOAD CAPACITANCEMAX3316E TOC10
LOAD CAPACITANCE (pF)
SUPPLY CURRENT (mA)100020003000
Typical Operating Characteristics (continued)(VCC= +2.5V, C1–C4 = 0.1µF, 460kbps data rate, all transmitters loaded with 3kΩ, TA= +25°C, unless otherwise noted.)
MAX3316E–MAX3319E
±15kV ESD-Protected, 2.5V, 1µA, 460kbps,
RS-232 Compatible TransceiversTRANSMITTER SKEW vs.
LOAD CAPACITANCE (tPLH - tPHL)
MAX3316E TOC11
LOAD CAPACITANCE (pF)
TRANSMITTER SKEW (ns)
MAX3318E/MAX3319E
READY TURN-ON TIME
vs. TEMPERATURE
MAX3316E TOC12
TEMPERATURE (°C)
READY TURN-ON TIME (
MAX3318E/MAX3319E
READY TURN-OFF TIME
vs. TEMPERATURE
MAX3316E TOC13
TEMPERATURE (°C)
READY TURN-OFF TIME (ns)
Typical Operating Characteristics (continued)(VCC= +2.5V, C1–C4 = 0.1µF, 460kbps data rate, all transmitters loaded with 3kΩ, TA= +25°C, unless otherwise noted.)
Pin Description
MAX3316E–MAX3319E
±15kV ESD-Protected, 2.5V, 1µA, 460kbps,
RS-232 Compatible Transceivers
Pin Description (continued)
Detailed Description
Dual Charge-Pump Voltage ConverterThe MAX3316E–MAX3319Es’ internal power supply
consists of a regulated dual charge pump that provides
output voltages of +4.4V (doubling charge pump) and
-4.3V (inverting charge pump), over the +2.25V to
+3.0V range. The charge pump operates in discontinu-
ous mode: if the output voltages are less than 4.4V, the
charge pump is enabled; if the output voltages exceed
4.4V, the charge pump is disabled. Each charge pump
requires a flying capacitor (C1, C2) and a reservoir
capacitor (C3, C4) to generate the V+ and V- supplies.
The READY output (MAX3318E/MAX3319E) is low
when the charge pumps are disabled in shutdown
mode. The READY signal asserts high when V- goes
below -2.75V.
RS-232 Compatible TransmittersThe MAX3316E–MAX3319Es’ transmitters are inverting
level translators that convert CMOS-logic levels to
RS-232 compatible voltage levels. They guarantee a
460kbps data rate with worst-case loads of 3kΩin parallel
with 1000pF, providing compatibility with PC-to-PC
communication software (such as LapLink™).
The MAX3317E’s transmitters are turned off (high
impedance) when SHDNis asserted low, putting the
device in shutdown mode. The MAX3318E/MAX3319Es’
transmitters are turned off (high impedance) when
FORCEOFFis asserted low, or when the AutoShutdown
Plus circuitry senses that all receiver and transmitter
inputs are inactive for more than 30 seconds.
The transmitter outputs can be driven to ±12V when
power is off. The transmitter inputs do not have internal
pull-up resistors. Connect unused inputs to GND or VCC.
RS-232 ReceiversThe MAX3316E–MAX3319Es’ receivers convert ±3.7V
to ±13.2V RS-232 signal levels into CMOS-logic output
levels. The receivers are rated to receive signals up to
±25V. The MAX3316E/MAX3318E/MAX3319Es’
receivers feature inverting outputs that always remain
active (Table 1). The MAX3317E’s receivers have
inverting, three-state outputs. In shutdown, the
receivers can be active or inactive (Table 2).
The MAX3318E/MAX3319E feature an INVALIDoutput
that is asserted low when no valid RS-232 voltage levels
have been detected on all receiver inputs. BecauseINVALIDindicates the receiver’s input condition, it
is independent of the states of FORCEON and
FORCEOFF.
MAX3317E Shutdown ModeSupply current falls to less than 1µA in shutdown mode
(SHDN= low). When shut down, the device’s charge
pumps are turned off, V+ is pulled down to VCC, V- is
pulled to ground, and the transmitter outputs are dis-
abled (high impedance). The time required to exit shut-LapLink is a trademark of Traveling Software.
MAX3316E–MAX3319E
±15kV ESD-Protected, 2.5V, 1µA, 460kbps,
RS-232 Compatible Transceiversdown is typically 30µs, as shown in Figure 2. Connect
SHDNto VCCif the shutdown mode is not used; SHDN
has no effect on R_OUT.
MAX3318E/MAX3319E
AutoShutdown Plus ModeMaxim’s AutoShutdown Plus feature on the MAX3318E/
MAX3319E allows the supply current to fall to 1µA.
These devices will enter the AutoShutdown Plus mode if
FORCEOFFis high, FORCEON is low, and they do not
sense a valid signal transition on any receiver or trans-
mitter input for 30 seconds. This may occur if the RS-232
cable is disconnected or if the peripheral transmitters
are turned off, and the UART driving the transmitter
inputs is inactive. The system turns on again when a
valid transition is applied to any RS-232 receiver or
transmitter input. As a result, the system saves power
without changes to the existing BIOS or operating system.
Figure 4a depicts valid and invalid RS-232 receiver volt-
age levels. INVALIDindicates the receiver input’s condi-
tion and is independent of FORCEON and FORCEOFF
states. Figure 3 and Table 1 summarize the operating
modes of the MAX3318E/MAX3319E. FORCEON and
FORCEOFFoverride AutoShutdown Plus circuitry. When
neither control is asserted, the IC selects between these
states automatically based on the last receiver or trans-
mitter edge received.
When shut down, the device’s charge pumps turn off,
V+ is pulled to VCC, V- is pulled to ground, the transmitter
outputs are high impedance, and READY is driven low.
The time required to exit shutdown is typically 30µs
(Figure 2).
Table 1. Output Control Truth Table (MAX3318E/MAX3319E)
