TRS3237E
3V 至 5.5V 多通道 RS-232 1Mbit/s 线路驱动器/接收器
* Meets or Exceeds the Requirements of A/EIA-232-F and ITU v.28 Standards
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- Operates With 3-V to 5.5-V VCC Supply
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- Operates From 250 kbits/s to 1 Mbit/s
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- Low Standby Current . . . 1 µA Typical
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- External Capacitors . . . 4 × 0.1 µF
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- Accepts 5-V Logic Input With 3.3-V Supply
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- Designed to Be Interchangeable With Industry Standard 3237E Devices
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- Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
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- ESD Protection for RS-232 I/O Pins
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- ±15 kV – Human-Body Model HBM
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- ±8 kV – IEC61000-4-2, Contact Discharge
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- ±15 kV – IEC61000-4-2, Air-Gap Discharge
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- APPLICATIONS
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- Battery-Powered, Hand-Held, and Portable Equipment
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- PDAs and Palmtop PCs
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- Notebooks, Sub-Notebooks, and Laptops
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- Digital Cameras
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- Mobile Phones and Wireless Devices
## DESCRIPTION/ORDERING INFORMATION
The consists of five line drivers, three line receivers, and a dual charge-pump circuit with ±15-kV ESD protection pin to pin serial-port connection pins, including GND. 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. This device operates at data signaling rates of 250 kbit/s in normal operating mode MBAUD = GND and 1Mbit/s when MBAUD = VCC. The driver output slew rate is a maximum of 30 V/µs.
The TRS3237E transmitters are disabled and the outputs are forced into high-impedance state when the device is in shutdown mode SHDN = GND and the supply current falls to less than 1 µA. Also, during shutdown, the onboard charge pump is disabled; V+ is lowered to VCC, and V– is raised toward GND. Receiver outputs also can be placed in the high-impedance state by setting enable EN high. ROUT1B remains active all the time, regardless of the EN and SHDN condition.
The TRS3237EC is characterized for operation from 0°C to 70°C. The TRS3237EI is characterized for operation from –40°C to 85°C.
