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Zakładka z wyszukiwarką danych komponentów |
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LTC1335CS Arkusz danych(PDF) 1 Page - Linear Technology |
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LTC1335CS Arkusz danych(HTML) 1 Page - Linear Technology |
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1 / 20 page  1 LTC1321/LTC1322/LTC1335 RS232/EIA562/RS485 Transceivers S FEATURE The LTC1321/LTC1322/LTC1335 are low power CMOS bidirectional transceivers, each featuring two reconfigurable interface ports. Each can be configured as two RS485 differential ports, as two single-ended ports, or as one RS485 differential port and one single-ended port. The LTC1321/LTC1322 can provide RS232 or EIA562 compat- ible single-ended outputs; the LTC1335 provides EIA562 compatible outputs and additionally includes an output enable pin, allowing the receiver logic level outputs to be three-stated. The RS232/EIA562 transceivers operate to 120kbaud and are in full compliance with EIA/TIA-562 specification. The RS485 transceivers operate to 10Mbaud and are in full compliance with RS485 and RS422 specifications. All interface drivers feature short-circuit and thermal shut- down protection. An enable pin allows RS485 driver outputs to be forced into high impedance which is main- tained even when the outputs are forced beyond supply rails or power is off. Both driver outputs and receiver inputs feature ±10kV ESD protection. A loopback mode connects the driver outputs back to the receiver inputs for diagnostic self-test. The LTC1321/LTC1322 can support RS232 voltage levels when 6.5V ≤ VDD ≤ 10V and –6.5V ≥ VEE ≥ –10V. The LTC1335 supports receiver output enable but not RS232 levels. A shutdown mode reduces the ICC supply current to 15 µA. DESCRIPTIO APPLICATIONS s Low Power RS485/RS422/EIA562/RS232 Interface s Cable Repeater s Level Translator s LTC1321: 2-EIA562/RS232 Transceivers/2-RS485 Transceivers s LTC1322: 4-EIA562/RS232 Transceivers/2-RS485 Transceivers s LTC1335: 4-EIA562 Transceivers/2-RS485 Transceivers with OE s LTC1321/LTC1322 Have the Same Pinout as SP301/SP302 s LTC1335 Features Receiver Three-State Outputs s Low Supply Current: 1mA Typical s 15 µA Supply Current in Shutdown s 120kBaud in EIA/TIA-562 or RS232 Mode s 10MBaud in RS485/RS422 Mode s Self-Testing Capability in Loopback Mode s Power-Up/Down Glitch-Free Outputs s Driver Maintains High Impedance in Three-State, Shutdown or With Power Off s Thermal Shutdown Protection s I/O Lines Can Withstand ±25V s Withstands Repeated 10kV ESD Pulses APPLICATI TYPICAL 19 5V 6 5V 7 5V 18 0V 1 24 VCC2 5V 1 24 VCC1 5V 120 Ω 2 LTC1322 1321/22/35 TA01 RX OUT 21 RS485 INTERFACE DR ENABLE 3 4 5 12 22 DR IN 20 13 VEE1 –5V 11 19 LTC1322 RX OUT 16 5V DR ENABLE 10 9 8 7 6 12 15 DR IN 17 5V 18 13 VEE2 –5V 120 Ω 4000-FT 24-GAUGE TWISTED PAIR 5V 0V 8 DR IN 17 3 22 RX OUT 11 14 RX OUT 4 DR IN 21 EIA562 INTERFACE 9 DR IN 16 2 23 RX OUT 10 15 RX OUT 5 DR IN 20 |
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