Shenzhen Sai Collie Technology Co., Ltd. |
|
TRS3221ECPWR Integrated Circuit IC
Chip Single Channel 250kbps RS-232 Line Driver Receiver Package TSSOP-16
TRS3221ECPWR
SMD/SMT | |
TSSOP-16 | |
TRS3221E | |
Transceiver | |
250 kb/s | |
1 Driver | |
1 Receiver | |
Full Duplex | |
5.5 V | |
3 V | |
1 mA | |
0 C | |
+ 70 C | |
15 kV | |
Reel | |
Cut Tape | |
MouseReel | |
Brand: | Texas Instruments |
Operating Supply Voltage: | 3.3 V, 5 V |
Product: | RS-232 Transceivers |
Product Type: | RS-232 Interface IC |
Propagation Delay Time: | 150 ns |
Shutdown: | With Shutdown |
TRS3221ECPWR Description
The TRS3221ECPWR is a single driver, single receiver RS-232 solution operating from
a single VCC supply. The RS-232 pins provide IEC G1000-4-2 ESD
protection. The device meets the requirements of TIA/EIA-232-F and
provides the electrical interface between an asynchronous
communication controller and the serial-port connector. The charge
pump and four small external capacitors allow operation from a
single 3-V to 5.5-V supply. These devices operate at data signaling
rates up to 250 kbit/s and a maximum of 30-V/µs driver output slew
rate.
Flexible control options for power management are available when the serial port is inactive. The auto-powerdown feature functions when FORCEON is low and FORCEOFF is high. During this mode of operation, if the device does not sense a valid RS-232 signal on the receiver input, the driver output is disabled. If FORCEOFF is set low and EN is high, both the driver and receiver are shut off, and the supply current is reduced to 1 µA. Disconnecting the serial port or turning off the peripheral drivers causes the auto-powerdown condition to occur. Auto-powerdown can be disabled when FORCEON and FORCEOFF are high.
With auto-powerdown enabled, the device is activated automatically
when a valid signal is applied to the receiver input. The INVALID
output notifies the user if an RS-232 signal is present at the
receiver input. INVALID is high (valid data) if the receiver input
voltage is greater than 2.7 V or less than –2.7 V, or has been
between –0.3 V and 0.3 V for less than 30 µs. INVALID is low
(invalid data) if the receiver input voltage is between –0.3 V and
0.3 V for more than 30 µs. Refer to Figure 7-5 for receiver input
levels.
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