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Details, datasheet, quote on part number:ST485ERBD
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Datasheet text preview:
ST485ER
±15KV ESD PROTECTED, LOW POWER RS-485/RS-422 TRANSCEIVER
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LOW QUIESCENT C URRENT: 300µA D ESIGNED FOR RS-485 INTERFACE APPLICATIONS -7V TO 12V COMMON MODE INPUT VOLTAGE RAN GE D RIVER MAINTAINS HIGH IMPEDANCE IN 3-STATE OR WITH THE POW ER OFF 70mV TYPICAL INPUT H YSTERESIS 30ns PROPAGATION DELAYS, 5ns SKEW OPERATE FROM A SINGLE 5V SUPPLY C URRENT LIMITING AN D THER MAL SHUTDOW N FOR DRIVER OVERLOAD PROTECTION ESD PR OTECTION: ±15KV (H.B.M.) ±8KV (IEC-1000-4-2 CON TACT D ISCHARGE) ALLOWS UP TO 256 TRANSCEIVERS ON T HE B US
DIP
SOP
DESCRIPTION The ST485E is al low power transceiver for RS-485 and RS-422 communication. Each driver output and receiver input is protected against ±15KV electrostatic discharge (H.B.M.) ±8KV (IEC-1000-4-2 contact discharge) shocks, without ORDERING CODES
Type ST485ERCN ST485ERBN ST485ERXN ST485ERCD ST485ERBD ST485ERXD ST485ERCDR ST485ERBDR ST485ERXDR Temperature Range 0 to 70 °C -40 to 85 °C -55 to 150 °C 0 to 70 °C -40 to 85 °C -55 to 150 °C 0 to 70 °C -40 to 85 °C -55 to 150 °C Package
latchup. These parts contain one driver and one receiver. This transceiver draws 300µA (typ.) of supply current when unloaded or fully loaded with disabled drivers. It operates from a single 5V supply. Driver is short-circuit current limited and is protected against excessive power dissipation by thermal shutdow n circuitry that places the driver outputs into a high-impedance state. The ST485E is designed for bi-directional data communications on multipoint bus transmission line (half-duplex applciations).
Comments 50parts per tube / 40tube per box 50parts per tube / 40tube per box 50parts per tube / 40tube per box 100parts per tube / 20tube per box 100parts per tube / 20tube per box 100parts per tube / 20tube per box 2500 parts per reel 2500 parts per reel 2500 parts per reel
DIP-8 DIP-8 DIP-8 SO-8 (Tube) SO-8 (Tube) SO-8 (Tube) SO-8 (Tape & Reel) SO-8 (Tape & Reel) SO-8 (Tape & Reel)
September 2003
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ST485ER
P I N C O N FI GU R A TI ON
PIN DESCRIPTION
PlN N° 1 2 3 4 5 6 7 8 SYMBOL RO RE DE DI GND A B VCC NAME AND FUNCTION Receiver Output Receiver Output Enable Driver Output Enable Driver Input Ground Non-inverting Receiver Input and Non-inverting Driver Output Inverting Receiver Input and Inverting Driver Output Supply Voltage
TRUTH TA BLE (DRIVER)
INPUTS RE X X X DE H H L DI H L X OUTPUTS B L H Z A H L Z
TRUTH TA BLE (RECEIVER)
INPUTS RE L L L H DE L L L L A-B +0.2V -0.2V INPUTS OPEN X OUTPUT RO H L H Z
X= Don't Care; Z =High Impedance
X= Don't Care; Z =High Impedance
AB SOLUTE MAXIMUM RATINGS
Symbol VCC VI V DI V DO V RI VRO Supply Voltage Control Input Voltage (RE, DE) Driver Input Voltage (DI) Driver Output Voltage (A, B) Receiver Input Voltage (A, B) Receiver Output Voltage (RO) Parameter Value 7 -0.5 to (VCC + 0.5) -0.5 to (VCC + 0.5) ± 14 ± 14 -0.5 to (VCC + 0.5) Unit V V V V V V
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
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ST485ER
ESD PERFORMANCE: TRANSMITTER OUTPUTS, RECEIVER IN PUTS
Symbol ESD ESD Parameter ESD Protection Voltage ESD Protection Voltage Test Conditions Human Body Model IEC-1000-4-2 (Contact Discharge) Min. ±15 ±8 Typ. Max. Unit KV KV
DC ELECTRICAL C HARACTERISTICS (VCC = 5V ± 5%, TA = TMIN to TMAX , unless otherwise specified. Typical values are referred to TA = 25°C) (S ee Not e 1 )
Symbol VOD1 VOD2 VOD Parameter Differential Driver Output (No Load) Differential Driver Output (With Load) Change in Magnitude of Driver Differential Output Voltage for Complementary Output States Driver Common-Mode Output Voltage Change in Magnitude of Driver Common-Mode Output Voltage for Complementary Output States Input High Voltage Input Low Voltage Input Current Input Current (A, B) Test Conditions Min. Typ. Max. 5 RL = 27 (RS-485) (See Fig. 1) RL = 50 (RS-422) (See Fig. 1) RL = 27 or 50 (See Fig. 1) 1.5 5 5 0.2 Unit V V V V
VOC VOC
RL = 27 or 50 (See Fig. 1) RL = 27 or 50 (See Fig. 1)
3 0.2
V V
VIH VIL IIN1 IIN2
RE, DE, DI RE, DE, DI RE, DE, DI VCM = 0V or 5.25V VIN = 12V VIN = -7V VCM = -7 to 12V VCM = 0V IO = -4mA IO = 4mA VID = 200mV VID = -200mV V DE = 0 V
2.0 0.8 ±2 1 -0.8 -0.2 70 3.5 0.4 ±1 96 110 400 300 35 35 7 9 00 5 00 250 250 95 0.2
V V µA mA mA V mV V V µA K µA µA mA mA mA
V TH VTH VO H V OL IOZR RIN IC C
Receiver Differential Threshold Voltage Receiver Input Hysteresis Receiver Output High Voltage Receiver Output Low Voltage 3-State (High Impedance) Output Current at Receiver Receiver Input Resistance No Load Supply Current (Note 2)
VO = 0.4 to 2.4V VCM = -7 to 12V VRE = 0V or VCC VDE = VCC VDE = 0V
IOSD1 IOSD2 IOSR
Driver Short-Circuit Current, VO = -7 to 12V (Note 3) VO=High Driver Short-Circuit Current, VO = -7 to 12V (Note 3) VO=Low Receiver Short-Circuit Current VO = 0V to VCC
Note 1: All currents into device pins are positive; all cuttents out of device pins are negative; all voltages are referenced to device ground unless specified. Note 2: Supply current specification is valid for loaded transmitters when VDE = 0V Note 3: Applies to peak current. See typical Operating Characteristics.
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