DS276 Maxim Integrated Products, DS276 Datasheet
DS276
Specifications of DS276
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DS276 Summary of contents
Page 1
... Compatible with RS-232-E signals DESCRIPTION The DS276 Line-Powered RS-232 Transceiver Chip is a CMOS device that provides a low-cost, very low-power interface to RS-232 serial ports. The receiver input translates RS-232 signal levels to common CMOS/TTL levels. The transmitter can be used with independently supplied positive and negative supplies, but in most cases will be used with the positive supply, sharing the logic supply and the negative supply stolen from the receive RS-232 signal when that signal negative state (marking) ...
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... RS-232 COMPATIBILITY The intent of the DS276 is not so much to meet all the requirements of the RS-232 specification as to offer a low-power solution that will work with most RS-232 ports with a connector length of less than 10 ) when data is sent. However, since synchronous ...
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... As a prime example, the DS276 will not meet the RS-232 requirement that the signal levels be at least 5 volts minimum when terminated =load and V will be present at TX when spacing under this condition, depending on the supply voltage. However, OUT since most RS-232 receivers will correctly interpret any voltage over 2 volts as a space, there will be no problem transmitting data ...
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... increased to 5V, and V drv+ devices is possible, although of course the output voltage swing of the DS276 remains below the RS-232 specification. The V supply can be derived using the “stealing” technique shown in Figure 4. drv- ...
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... V IN will be drawn. Therefore, if negative voltage swings are present on RX connected to ground and the circuit shown in Figure 4 should be used. can be supplied independently from a higher DRV marking (or idle) state. When the DS276 spacing the capacitor will discharge towards ground with DS276 ...
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... V DRV2 CC2 GND DRV2 GND CC2 DRV3 DRV DRV- OTXH V =4.5V, DRV+ V =-12V 3.8 DRV TYP MAX UNITS 3-5 5 3-5 5 +0.3 0 TYP MAX UNITS 3.6 V 400 800 uA 40 100 uA 3 100 DS276 NOTES NOTES ...
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... Max data rate = 50k bps See test circuit in Figure HYS TH TL MIN V += DRV V =2. OTXL V =0 DRV 5.5V, SC DRV -12V DRV 0 1.2 V 0.4 HYS 2. 2. 0.4V 0 must be greater than DS276 ( TYP MAX UNITS NOTES 0.2 0 - 1.0 1.6 V 2.0 2 DRV- ...
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... DRV+ V =-12V DRV DRV V =12V CC V =12V V DRV- OTXL V =V DRV DRV 12V, SC DRV -12V DRV 0 1 0.5 HYS TYP MAX UNITS 5 5.5 V 400 800 uA 40 100 uA 3 100 -11 -10 V 0 DS276 NOTES ...
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... See test circuit in Figure 12 HYS TH TL DYNAMIC OPERATING CURRENT TEST CIRCUIT Figure 5 STATIC OPERATING CURRENT TEST CIRCUIT Figure DS276 ...
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... DRIVER LEAKAGE TEST CIRCUIT Figure 7 PROPAGATION DELAY TEST CIRCUIT Figure 8 DYNAMIC OPERATING CURRENT TEST CIRCUIT Figure DS276 ...
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... STATIC OPERATING CURRENT TEST CIRCUIT Figure 10 DRIVER LEAKAGE TEST CIRCUIT Figure 11 PROPAGATION DELAY TEST CIRCUIT Figure DS276 ...