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When no valid RS voltages see Figure 6 are sensed on any receiver input for 30?

Аналоги для «3222»

These devices power up again when a valid RS voltage is applied to any receiver input. The specification table lists a minimum of kbps to maintain complete compatibility with competitor data sheets. Each transmitter is loaded with 3k? Internally generated negative transmitter supply The INVALID output always indicates whether or not a valid RS signal is present at any of the receiver inputs see Table 2giving the user an easy way to determine when the interface block should power down.

This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this speci? See Table 4 for more information on possible combinations of interconnections. Figure 9 shows the transmitter output voltages under increasing load current. For other supply voltages refer to Table 3 for capacitor values. Active low input to shut down transmitters and on-board power supply, to place device in low power mode.


When using minimum required capacitor values, make sure that capacitor values do not degrade excessively with temperature. The charge pump, the transmitters, and the receivers. Note that all the receiver outputs remain enabled during shutdown see Table 2. Increasing the capacitor values by a factor of 2 reduces ripple on the transmitter 2322 and slightly reduces power consumption.

Except for the ICL, all transmitter outputs disable and assume a high impedance state when the device enters the powerdown mode see Table 2. Targeted applications are PDAs, Palmtops, and notebook and laptop computers where the low operational, and even lower standby, power consumption is critical.

Do not 3222 values smaller than those listed in Table ocl.

Guaranteed Minimum Data Rate. Connect the bypass capacitor as close as possible to the IC.

Small footprint packaging, and the use of small, low value capacitors ensure board space savings as well. Capacitor Selection The charge pumps require 0. Note that the transmitters enable only when the icp of the supplies exceed approximately 3V.

F capacitors for 3. External capacitor voltage doubler is connected to this lead. If in doubt, use capacitors with a larger nominal value. F bypass capacitor is adequate.


Поиск аналога для «ICL» |

Figure 12 shows the loopback results for a single transmitter driving pF and an RS load at kbps. This family is fully compatible with 3. The circuit is divided into three sections: All Transmitter Outputs Loaded with 3k?

Driving EN high disables all the inverting standard receiver outputs placing them in a high impedance state. Inverting receiver outputs may or may not disable in powerdown; refer to Table 2 for details. Wide Power Supply Range. For this test, all transmitters were simultaneously driving RS loads in parallel with pF, at kbps.

ICLX monitor receivers remain active even during manual powerdown and forced receiver disable, making them extremely useful for Ring Indicator monitoring. Low Supply Current in Powerdown State. The already low current requirement drops signi? INVALID operates in all modes forced or automatic powerdown, or forced onso it is also useful for systems employing manual powerdown circuitry.

The power management logic then uses this indicator to power down the interface block.

In powerdown, supply current drops to 1?