ST485EC ,LOW POWER RS-485/RS422 TRANSCEIVERAPPLICATIONS■ -7V TO 12V COMMON MODE INPUTVOLTAGE RANGE■ DRIVER MAINTAINS HIGH IMPEDANCE IN3-STATE ..
ST485ECD ,LOW POWER RS-485/RS422 TRANSCEIVERAPPLICATIONS■ -7V TO 12V COMMON MODE INPUT VOLTAGE RANGE■ DRIVER MAINTAINS HIGH IMPEDANCE IN 3-STAT ..
ST485ECDR ,LOW POWER RS-485/RS422 TRANSCEIVERAbsolute Maximum Ratings are those values beyond which damage to the device may occur. Functional o ..
ST485ECN ,LOW POWER RS-485/RS422 TRANSCEIVERapplications).±15KV electrostatic discharge (H.B.M.) (ESD)shocks, without latcup. These parts conta ..
ST485ERBD ,LOW POWER RS-485/RS422 TRANSCEIVERAPPLICATIONS■ -7V TO 12V COMMON MODE INPUT VOLTAGE RANGE■ DRIVER MAINTAINS HIGH IMPEDANCE IN 3-STAT ..
ST485ERBDR ,LOW POWER RS-485/RS422 TRANSCEIVERAbsolute Maximum Ratings are those values beyond which damage to the device may occur. Functional o ..
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STM8S208S6T3C ,Mainstream Performance line 8-bit MCU with 32 Kbytes Flash, 24 MHz CPU, integrated EEPROMThermal characteristics . . . . . . 9511.2.1 Reference document . . . . . . . 9511.2.2 Se ..
STM8S208S6T6C ,Mainstream Performance line 8-bit MCU with 32 Kbytes Flash, 24 MHz CPU, integrated EEPROMfeatures 19Table 5. Legend/abbreviations for pinout table . 28Table 6. Pin description ..
STM8S903F3M6 ,Mainstream Application specific line 8-bit MCU with 8 Kbytes Flash, 16 MHz CPU, integrated EEPROMFeaturesCommunicationsinterfacesCoreUARTwithclockoutputforsynchronous16MHzadvancedSTM8corewithHarva ..
STM8S903K3T6C ,Mainstream Application specific line 8-bit MCU with 8 Kbytes Flash, 16 MHz CPU, integrated EEPROMSTM8S903K3STM8S903F316MHzSTM8S8-bitMCU,upto8KbytesFlash,1KbyteRAM,640bytesEEPROM,10-bitADC,2timers, ..
STM8S903K3T6CTR ,Mainstream Application specific line 8-bit MCU with 8 Kbytes Flash, 16 MHz CPU, integrated EEPROMfeatures......9Table2.PeripheralclockgatingbitassignmentsinCLK_PCKENR1/2registers.......14Table3.TI ..
ST485EB-ST485EC
LOW POWER RS-485/RS422 TRANSCEIVER
1/13September 2003 LOW QUIESCENT CURRENT: 300μA DESIGNED FOR RS-485 INTERFACE
APPLICATIONS -7V TO 12V COMMON MODE INPUT
VOLTAGE RANGE DRIVER MAINTAINS HIGH IMPEDANCEIN
3-STATE ORWITHTHE POWER OFF 70mV TYPICAL INPUT HYSTERESIS 30ns PROPAGATION DELAYS, 5ns SKEW OPERATE FROMA SINGLE 5V SUPPLY CURRENT LIMITING AND THERMAL
SHUTDOWN FOR DRIVER OVERLOAD
PROTECTION ESD PROTECTION:
±15KV (H.B.M.)
±8KV (IEC-1000-4-2 CONTACT
DISCHARGE) ALLOWS UP TO64 TRANSCEIVERS ON
THE BUS
DESCRIPTIONThe ST485Eis al low power transceiver for
RS-485 and RS-422 communication. Each driver
output and receiver inputis protected against
±15KV electrostatic discharge (H.B.M.) (ESD)
shocks, without latcup. These parts contain one
driver and one receiver in half duplex
configuration.
This transceiver draw 300μA (typ.) of supply
current when unloaded or fully loaded with
disabled drivers. operates froma single 5V supply.
Driver is short-circuit current limited and is
protected against excessive power dissipationby
thermal shutdown circuitry that place the driver
outputs intoa high-impedance state.
The ST485Eis designed for bi-directional data
communications on multipoint bus transmission
line (half-duplex applications).
ORDERING CODES
ST485E±15KV ESD PROTECTED, LOW POWER
RS-485/RS-422 TRANSCEIVER
ST485E2/13
PIN CONFIGURATION
PIN DESCRIPTION
TRUTH TABLE (DRIVER) Don’t Care; Z=High Impedance
TRUTH TABLE (RECEIVER) Don’t Care; Z=High Impedance
ABSOLUTE MAXIMUM RATINGSAbsoluteMaximum Ratingsare those values beyond which damagetothe device may occur. Functional operation under these conditionis
not implied.
ST485E3/13
ESD PERFORMANCE: TRANSMITTER OUTPUTS, RECEIVER INPUTS ELECTRICAL CHARACTERISTICSCC =5V ± 5%,TA =T MINtoT MAX, unless otherwise specified. Typical values are referredtoTA= 25°C)
(See Note1)
Note1:All currentsinto device pinsare positive;all cuttentsoutof device pinsare negative;all voltagesare referencedto device ground
unless specified.
Note2: Supply current specificationis validfor loaded transmitters when VDE =0V
Note3: Appliesto peak current. See typical Operating Characteristics.
ST485E4/13
DRIVER SWITCHING CHARACTERISTICS(VCC =5V ± 5%,TA =TMINto TMAX, unless otherwise specified. Typical values are referredtoTA =25°C)
(See Note1)
Note1:All currentsinto device pinsare positive;all cuttentsoutof device pinsare negative;all voltagesare referencedto device ground
unless specified.
RECEIVER SWITCHING CHARACTERISTICSCC =5V ± 5%,TA =T MINtoT MAX, unless otherwise specified. Typical values are referredtoTA= 25°C)
(See Note1)
Note1:All currentsinto device pinsare positive;all cuttentsoutof device pinsare negative;all voltagesare referencedto device ground
unless specified.
ST485E5/13
TEST CIRCUITS AND TYPICAL CHARACTERISTICS
ST485E6/13
Figure5: Driver Propagation Delay
Figure6: Driver Enable and Disable Time
ST485E7/13
Figure7: Receiver Propagation Delay
Figure8: Receiver Enable and Disable Time
