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LTC1519 数据表(PDF) 1 Page - Linear Technology |
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LTC1519 数据表(HTML) 1 Page - Linear Technology |
1 / 12 page 1 LTC1518/LTC1519 52Mbps Precision Delay RS485 Quad Line Receivers 100 Ω A 1 4 EN EN RO 1518/19 F08 1/4 LTC1518 LTC1685 LTC1685 12 3 2 B 7 6 3 2 DE DI RO 4 1 100 Ω 7 6 3 2 DE DI RO 4 1 RE RE DESCRIPTION s Precision Propagation Delay: 18.5ns ±3.5ns Over Temperature s High Data Rate: 52Mbps s Low tPLH/tPHL Skew: 500ps Typ s Low Channel-to-Channel Skew: 500ps Typ s –7V to 12V RS485 Input Common Mode Range s Input Resistance ≥22k, Even When Unpowered s Guaranteed Fail-Safe Operation over the Entire Common Mode Range s Hot Swap TM Capable s High Common Mode Rejection to 26MHz s Short-Circuit Protection: 10mA Typ Output Current for an Indefinite Short s Three-State Output Capability s Will Not Oscillate with Slow Moving Input Signals s Single 5V Supply s Pin Compatible with LTC488, LTC489 FEATURES The LTC ®1518/LTC1519 are high speed, precision delay differential quad bus/line receivers that can operate at data rates as high as 52Mbps. They are pin compatible with the LTC488/LTC489 RS485 line receivers and operate over the entire – 7V to 12V common mode range. A unique architec- ture provides very stable propagation delays and low skew over wide input common mode, input overdrive and ambi- ent temperature ranges. Propagation delay is 18.5ns ±3.5ns. Typical tPLH/tPHL and channel-to-channel skew is 500ps. Each receiver translates differential input levels ( VID ≥ 300mV) into valid CMOS and TTL output levels. Its high input resistance ( ≥22k) allows many receivers to be con- nected to the same driver. The receiver outputs go into a high impedance state when disabled. The receivers have a fail-safe feature that guarantees a high output state when the inputs are shorted or left floating. Other protection features include thermal shutdown and a controlled maximum short-circuit current (50mA Max). Input resistance remains ≥22k when the device is unpowered or disabled, thus allowing hot swapping with- out loading the data lines. The LTC1518/LTC1519 operate from a single 5V supply and draw 12mA of supply current. APPLICATIONS s High Speed RS485/RS422 Receivers s STS-1/OC-1 Data Receivers s PECL Line Receivers s Level Translators s Fast-20/Fast-40 SCSI Receiver Propagation Delay Guaranteed to Fall Within Shaded Area ( ±3.5ns) 1518/19 TA02 VIN = 3V/DIV VOUT = 5V/DIV –5 5 15 TIME (ns) 25 35 0 10203040 45 RECEIVER INPUT VID = 1.5V RECEIVER OUTPUT VDD = 5V 52Mbps Data Communication over Twisted Pair TYPICAL APPLICATION , LTC and LT are registered trademarks of Linear Technology Corporation. Hot Swap is a trademark of Linear Technology Corporation. |
类似零件编号 - LTC1519 |
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类似说明 - LTC1519 |
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