MAX3317CAP ,2.5V, 1?A, 460kbps, RS-232-Compatible TransceiversApplicationsINPUTOUTPUTRS-232-Palmtop Computers9 R1OUT R1IN 8CMOSCOMPATIBLEOUTPUTHand-Held Instrume ..
MAX3317EAP ,2.5V, 1?A, 460kbps, RS-232-Compatible TransceiversFeaturesThe MAX3316–MAX3319 transceivers have a proprietary AutoShutdown Plus (MAX3318/MAX3319)low ..
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 ..
MAX6966AEE ,2.25 V to 3.6 V, 10-port constant-current LED driver and I/O expander 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™ ..
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 ..
MAX3317CAP-MAX3317EAP-MAX3319CAE
2.5V, 1?A, 460kbps, RS-232-Compatible Transceivers
General DescriptionThe MAX3316–MAX3319 transceivers have a proprietary
low-dropout transmitter output stage enabling RS-232-
compatible performance from +2.25V to +3.0V with a
dual-charge pump. These devices require only four
0.1µF capacitors, and are guaranteed to operate at data
rates up to 460kbps.
The MAX3318/MAX3319 achieve a 1µA supply current
using Maxim’s revolutionary AutoShutdown Plus™ fea-
ture. These devices automatically enter a low-power
shutdown mode when the RS-232 cable is disconnected
or the transmitters of the connected peripherals are inac-
tive 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 MAX3318
is a 2-Tx/2-Rx device while the MAX3319 is a 1-Tx/1-Rx
device. These devices also feature a logic-level output
(READY) that asserts when the charge pump is regulat-
ing and the device is ready to begin transmitting.
The MAX3316/MAX3317 are 2-Tx/2-Rx transceivers. The
MAX3317 features a 1µA shutdown mode that can be
entered by driving SHDNlow. The MAX3317’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:
MAX3316 (16-pin SSOP and 20-pin TSSOP), MAX3317/
MAX3318 (20-pin SSOP and 20-pin TSSOP), and
MAX3319 (16-pin SSOP).
________________________ApplicationsPalmtop Computers
Hand-Held Instruments
Pagers
Cellular Phones
GPS
Handy Terminals
Hand-Held Electronic Books
FeaturesAutoShutdown Plus (MAX3318/MAX3319)300µA Operating Supply Current1µA Low-Power Shutdown with Receivers ActiveGuaranteed 460kbps Data RateGuaranteed 4V/µs Slew RateRS-232 Compatible Down to 2.25V
MAX3316–MAX3319
2.5V, 1µA, 460kbps,
RS-232-Compatible Transceivers
Typical Application Circuits19-1751; Rev 0; 6/00
Ordering InformationAutoShutdown Plus is a trademark of Maxim Integrated Products.
Pin Configurations appear at end of data sheet.
Selector Guide
Ordering Information continued at end of data sheet.
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 Ranges
MAX331_C_ _.....................................................0°C to +70°C
MAX331_E_ _..................................................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Die Temperature..............................................................+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.
MAX3316–MAX3319
MAX3316–MAX3319
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.)
MAX3316–MAX3319
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.
MAX3316–MAX3319
2.5V, 1µA, 460kbps,
RS-232-Compatible TransceiversMAX3318/MAX3319
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX3316 TOC06
VCC (V)
SUPPLY CURRENT (mA)-6
MAX3318/MAX3319
TRANSMITTER OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE
MAX3316 TOC07
VCC (V)
TRANSMITTER OUTPUT VOLTAGE (V)100020003000
MAX3318/MAX3319
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCEMAX3316 TOC08
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (V)
MAX3318/MAX3319
SLEW RATE vs. LOAD CAPACITANCEMAX3316 TOC09
LOAD CAPACITANCE (pF)
SLEW RATE (V/2000100030000
MAX3318/MAX3319
OPERATING SUPPLY CURRENT
vs. LOAD CAPACITANCEMAX3316 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.)
MAX3316–MAX3319
2.5V, 1µA, 460kbps,
RS-232-Compatible TransceiversTRANSMITTER SKEW vs.
LOAD CAPACITANCE (tPLH - tPHL)
MAX3316E TOC11
LOAD CAPACITANCE (pF)
TRANSMITTER SKEW (ns)
MAX3318/MAX3319
READY TURN-ON TIME
vs. TEMPERATURE
MAX3316E TOC12
TEMPERATURE (°C)
READY TURN-ON TIME (
MAX3318/MAX3319
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
MAX3316–MAX3319
2.5V, 1µA, 460kbps,
RS-232-Compatible Transceivers
Pin Description (continued)
Detailed Description
Dual Charge-Pump Voltage ConverterThe MAX3316–MAX3319s’ internal power supply con-
sists 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 input voltage range. The charge pump operates
in discontinuous 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 (MAX3318/MAX3319) 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 MAX3316–MAX3319s’ 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 MAX3317’s transmitters are turned off (high imped-
ance) when SHDNis asserted low, putting the device in
shutdown mode. The MAX3318/MAX3319s’ transmitters
are turned off (high impedance) when FORCEOFFis
asserted low, or when the AutoShutdown Plus circuitry
senses that all receiver and transmitter inputs are inac-
tive for more than 30 seconds.
The transmitter outputs can be driven to ±12V when
power is off. The transmitter inputs do not have internal
pullup resistors. Connect unused inputs to GND or VCC.
Figure 1a shows an RS-232-compatibility circuit and
Figure 1b shows MAX3316–MAX3319 transmitter output
compatibility with an RS-232 receiver.
RS-232 ReceiversThe MAX3316–MAX3319s’ receivers convert RS-232
signal levels into CMOS-logic output levels. The
receivers are rated to receive signals up to ±25V. The
MAX3316/MAX3318/MAX3319s’ receivers feature
inverting outputs that always remain active (Table 1).
The MAX3317’s receivers have inverting, three-state
outputs. In shutdown, the receivers can be active or
inactive (Table 2).
The MAX3318/MAX3319 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.
LapLink is a trademark of Traveling Software.
MAX3316–MAX3319
2.5V, 1µA, 460kbps,
RS-232-Compatible Transceivers
MAX3317 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 disabled
(high impedance). The time required to exit shutdown is
typically 30µs, as shown in Figure 2. Connect SHDNto
VCCif the shutdown mode is not used; SHDNhas no
effect on R_OUT.
MAX3318/MAX3319
AutoShutdown Plus ModeMaxim’s AutoShutdown Plus feature on the MAX3318/
MAX3319 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 MAX3318/MAX3319. FORCEON andFORCEOFFoverride 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.
Table 1. Output Control Truth Table (MAX3318/MAX3319)
