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SP3486 データシート(PDF) 5 Page - Sipex Corporation |
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SP3486 データシート(HTML) 5 Page - Sipex Corporation |
5 / 9 page 10/15/02 SP3486/3487 Low Power Quad RS485/422 Line Drivers © Copyright 2002 Sipex Corporation 5 AC PARAMETERS V CC = +3.3V±5%; typicals at 25°C; TAMB = 25°C unless otherwise noted. PARAMETER MIN. TYP. MAX. UNIT CONDITIONS PROPAGATION DELAY Driver Input to Output Figure 2 and 5 Low to High (t PLH)20 4060 ns High to Low (t PHL)20 4060 ns Differential Driver Skew 5 10 ns | t PHL(Y) - tPLH(Y) |, | tPHL(Z) - tPLH(Z) | , Figures 2 and 5 Driver Rise Time (t R) 10% to 90% R DIFF = 60Ω SP3486 10 ns SP3487 10 ns Driver Fall Time (t F) 90% to 10% R DIFF = 60Ω SP3486 10 ns SP3487 10 ns DRIVER ENABLE To Output High 110 ns Figures 3 and 6 To Output Low 110 ns Figures 4 and 6 DRIVER DISABLE From Output Low 110 ns Figures 4 and 6 From Output High 110 ns Figures 3 and 6 FEATURES The SP3486 and the SP3487 are +3.3V low power quad line drivers that meet the specifications of the RS-485 and RS-422 serial protocols. These devices are pin-to-pin compatible with Sipex's SP486 and SP487 devices as well as popular industry standards. The SP3486 and SP3487 devices feature Sipex's BiCMOS process allowing low power operation without sacrificing performance. The RS-485 standard is ideal for multi-drop applications or for long distance interfaces. RS-485 allows up to 32 drivers and 32 receivers to be connected to a data bus, making it an ideal choice for multi-drop applications. Since the cabling can be as long as 4,000 feet, RS-485 transceivers are equipped with a wide (-7V to +12V) common mode range to accomodate ground potential differences. Data is virtually immune to noise in the transmission line because the RS-485 protocol is a differential interface. Driver The drivers for both the SP3486 and SP3487 have differential outputs. The typical voltage output swing with no load will be 0V to +5V. With worst case loading of 54 Ω across the differential outputs, the driver can maintain greater than +1.5V voltage levels. The drivers of the SP3486 feature active HIGH and active LOW common driver enable controls. Refer to SP3486 Truth Table in Table 1. The SP3487 provides independent, active high driver enable controls for each pair of drivers. Refer to SP3487 Truth Table in Table 2. The driver outputs are short-circuit limited to 250mA. The SP3486 and SP3487 drivers meet the electrical specifications of RS-485 and RS-422 serial protocols up to 10Mbps under load. |
同様の部品番号 - SP3486 |
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同様の説明 - SP3486 |
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