TRS3237E Series

3- to 5.5-V multichannel 1Mbps RS-232 line driver/receiver with +/-15-kV IEC-ESD protection

Catalog

3- to 5.5-V multichannel 1Mbps RS-232 line driver/receiver with +/-15-kV IEC-ESD protection

Part	Mounting Type	Duplex	Receiver Hysteresis	Number of Drivers/Receivers [custom]	Number of Drivers/Receivers [custom]	Data Rate	Protocol	Voltage - Supply [Max]	Voltage - Supply [Min]	Package / Case [custom]	Package / Case	Package / Case [custom]	Operating Temperature [Max]	Operating Temperature [Min]	Type	Supplier Device Package
Texas Instruments TRS3237EIDB	Surface Mount	Full	500 mV	5	3	1 Mbps	RS232	5.5 V	3 V	0.209 in	28-SSOP	5.3 mm	85 °C	-40 °C	Transceiver	28-SSOP
Texas Instruments TRS3237EIDBR	Surface Mount	Full	500 mV	5	3	1 Mbps	RS232	5.5 V	3 V	0.209 in	28-SSOP	5.3 mm	85 °C	-40 °C	Transceiver	28-SSOP

Catalog

3- to 5.5-V multichannel 1Mbps RS-232 line driver/receiver with +/-15-kV IEC-ESD protection

Key Features

• Meets or Exceeds the Requirements of TIA/EIA-232-F and ITU v.28 StandardsOperates With 3-V to 5.5-V VCCSupplyOperates From 250 kbits/s to 1 Mbit/sLow Standby Current . . . 1 µA TypicalExternal Capacitors . . . 4 × 0.1 µFAccepts 5-V Logic Input With 3.3-V SupplyDesigned to Be Interchangeable With Industry Standard ’3237E DevicesLatch-Up Performance Exceeds 100 mA Per JESD 78, Class IIESD Protection for RS-232 I/O Pins±15 kV – Human-Body Model (HBM)±8 kV – IEC61000-4-2, Contact Discharge±15 kV – IEC61000-4-2, Air-Gap DischargeAPPLICATIONSBattery-Powered, Hand-Held, and Portable EquipmentPDAs and Palmtop PCsNotebooks, Sub-Notebooks, and LaptopsDigital CamerasMobile Phones and Wireless DevicesMeets or Exceeds the Requirements of TIA/EIA-232-F and ITU v.28 StandardsOperates With 3-V to 5.5-V VCCSupplyOperates From 250 kbits/s to 1 Mbit/sLow Standby Current . . . 1 µA TypicalExternal Capacitors . . . 4 × 0.1 µFAccepts 5-V Logic Input With 3.3-V SupplyDesigned to Be Interchangeable With Industry Standard ’3237E DevicesLatch-Up Performance Exceeds 100 mA Per JESD 78, Class IIESD Protection for RS-232 I/O Pins±15 kV – Human-Body Model (HBM)±8 kV – IEC61000-4-2, Contact Discharge±15 kV – IEC61000-4-2, Air-Gap DischargeAPPLICATIONSBattery-Powered, Hand-Held, and Portable EquipmentPDAs and Palmtop PCsNotebooks, Sub-Notebooks, and LaptopsDigital CamerasMobile Phones and Wireless Devices

Description

The TRS3237E 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 theENandSHDNcondition. The TRS3237EC is characterized for operation from 0°C to 70°C. The TRS3237EI is characterized for operation from –40°C to 85°C. The TRS3237E 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 theENandSHDNcondition. The TRS3237EC is characterized for operation from 0°C to 70°C. The TRS3237EI is characterized for operation from –40°C to 85°C.