Datasheet > DS275E+

DS275E+

更新时间： 2023-08-15 00:00:00

品牌	Logo	应用领域
罗彻斯特 - ROCHESTER		光电二极管
页数	文件大小	规格书
11页	878K
描述
LINE TRANSCEIVER, PDSO14, ROHS COMPLIANT, TSSOP-14

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DS275E+ 数据手册

DS275

problem that may occur in this case is if the receiver at the other end requires a negative voltage for

recognizing a mark. In this situation, the full-duplex circuit shown in Figure 3 can be used as

analternative. The 22 µF capacitor forms a negative-charge reservoir; consequently, when the TXD line is

spacing (positive), TXOUT still has a negative source available for a time period determined by the

capacitor and the load resistance at the other end (3-7 kΩ). This circuit was tested from 150-19,200 bps

with error-free operation using a SN75154 Quad Line Receiver as the receiver for the TX^OUTsignal. Note

that the SN75154 can have a marking input threshold below ground; hence there is the need for TX^OUTto

swing both positive and negative in full-duplex operation with this device.

HANDHELD RS-232-C APPLICATION USING A STEREO MINI-JACK Figure 2

FULL-DUPLEX CIRCUIT USING NEGATIVE-CHARGE STORAGE Figure 3

NOTE:

The capacitor stores negative charge whenever the TXD signal from the PC serial port is in a marking

data state (a negative voltage that is typically -10 volts). The top DS275’s TXOUT uses this negative

charge reservoir when it is in a marking state. The capacitor will discharge to 0 volts when the TXD line

is spacing (and TX^OUTis still marking) at a time constant determined by its value and the value of the load

resistance reflected back to TX^OUT. However, when TXD is marking the capacitor will quickly charge

back to -10 volts. Note that TXD remains in a marking state when idle, which improves the performance

of this circuit.

ABSOLUTE MAXIMUM RATINGS*

VCC

V^DRV

-0.3 to +7.0 volts

-0.3 to +13.0 volts

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1 2 3 456 7 8...11

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型号	品牌	获取价格	描述	数据表
DS275EN	MAXIM	获取价格	Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, CMOS, PDSO14, TSSOP-14
DS275N	MAXIM	获取价格	Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, CMOS, PDIP8, 0.300 INCH, PLASTIC, DIP-8
DS275N+	MAXIM	获取价格	Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, CMOS, PDIP8, 0.300 INCH, ROHS COMPLIANT, PLAST
DS275S	DALLAS	获取价格	Line-Powered RS-232 Transceiver Chip
DS275S	MAXIM	获取价格	Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, CMOS, PDSO8, 0.150 INCH, SOIC-8
DS275S+	MAXIM	获取价格	Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, CMOS, PDSO8, 0.150 INCH, ROHS COMPLIANT, SOIC-
DS275S+T&R	MAXIM	获取价格	Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, CMOS, PDSO8, 0.150 INCH, ROHS COMPLIANT, SOIC-
DS275SN	ROCHESTER	获取价格	LINE TRANSCEIVER, PDSO8, 0.150 INCH, SOIC-8
DS275SN+	MAXIM	获取价格	Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, CMOS, PDSO8, 0.150 INCH, ROHS COMPLIANT, SOIC-
DS275SN+	ROCHESTER	获取价格	LINE TRANSCEIVER, PDSO8, 0.150 INCH, ROHS COMPLIANT, SOIC-8