If V
參數(shù)資料
型號(hào): DS276+
廠商: Maxim Integrated Products
文件頁(yè)數(shù): 6/11頁(yè)
文件大小: 0K
描述: IC TXRX LO-PWR DPLX RS232 8-DIP
標(biāo)準(zhǔn)包裝: 50
類型: 收發(fā)器
驅(qū)動(dòng)器/接收器數(shù): 1/1
規(guī)程: RS232
電源電壓: 2.7 V ~ 5.5 V
安裝類型: 通孔
封裝/外殼: 8-DIP(0.300",7.62mm)
供應(yīng)商設(shè)備封裝: 8-PDIP
包裝: 管件
DS276
4 of 11
two similar devices over short distances, and into larger loads than the 3 k
=RS-232 standard (Figure 2).
If Vdrv+ is increased to 5V, and Vdrv- decreased (to less than -2V) communication with standard RS-232
devices is possible, although of course the output voltage swing of the DS276 remains below the RS-232
specification. The Vdrv- supply can be derived using the “stealing” technique shown in Figure 4.
5V OPERATION
The use of a single 5V supply for VCC and Vdrv+, and Vdrv- derived using the circuit in Figure 4 can
produce reliable communication with standard RS-232 devices, although the DS276 output voltage
swings are below the RS-232 minimum (Figure 3).
Increasing the magnitude of the voltage to Vdrv+ to 10 volts or more will result in “true” RS-232 output
voltage levels.
SINGLE 3V OPERATION Figure 2
(See Note 3)
SINGLE 5V OPERATION Figure 3
(not true RS-232)
(See Note 1 and 3)
"STEALING" NEGATIVE SUPPLY Figure 4
(See Note 2)
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