TRS3238E Series

3- to 5.5-V multichannel 400kbps RS-232 line driver/receiver with +/-15-kV IEC-ESD protection

Catalog

3- to 5.5-V multichannel 400kbps RS-232 line driver/receiver with +/-15-kV IEC-ESD protection

Part	Package / Case	Package / Case	Package / Case [y]	Duplex	Protocol	Data Rate	Type	Operating Temperature [Max]	Operating Temperature [Min]	Number of Drivers/Receivers [custom]	Number of Drivers/Receivers [custom]	Supplier Device Package	Mounting Type	Voltage - Supply [Max]	Voltage - Supply [Min]	Receiver Hysteresis	Package / Case [custom]	Package / Case [custom]
Texas Instruments TRS3238EIPWR	28-TSSOP	0.173 in	4.4 mm	Full	RS232	400 kbps	Transceiver	85 °C	-40 °C	5	3	28-TSSOP	Surface Mount	5.5 V	3 V	300 mV
Texas Instruments TRS3238EIDBR	28-SSOP			Full	RS232	400 kbps	Transceiver	85 °C	-40 °C	5	3	28-SSOP	Surface Mount	5.5 V	3 V	300 mV	0.209 in	5.3 mm
Texas Instruments TRS3238CPWR	28-TSSOP	0.173 in	4.4 mm	Full	RS232	250 KBd	Transceiver	70 °C	0 °C	5	3	28-TSSOP	Surface Mount	5.5 V	3 V	300 mV
Texas Instruments TRS3238EIDB	28-SSOP			Full	RS232	400 kbps	Transceiver	85 °C	-40 °C	5	3	28-SSOP	Surface Mount	5.5 V	3 V	300 mV	0.209 in	5.3 mm
Texas Instruments TRS3238IPWR	28-TSSOP	0.173 in	4.4 mm	Full	RS232	250 KBd	Transceiver	85 °C	-40 °C	5	3	28-TSSOP	Surface Mount	5.5 V	3 V	300 mV
Texas Instruments TRS3238ECDBR	28-SSOP			Full	RS232	400 kbps	Transceiver	70 °C	0 °C	5	3	28-SSOP	Surface Mount	5.5 V	3 V	300 mV	0.209 in	5.3 mm

Catalog

3- to 5.5-V multichannel 400kbps RS-232 line driver/receiver with +/-15-kV IEC-ESD protection

Key Features

• RS-232 Bus-Pin ESD Protection Exceeds ±15 kV Using Human-Body Model (HBM)Meets or Exceeds the Requirements of TIA/EIA-232-F and ITU v.28 StandardsOperates With 3-V to 5.5-V VCCSupplyOperates up to 400 kbit/sFive Drivers and Three ReceiversAuto-Powerdown Plus Feature Enables Flexible Power-Down ModeLow Standby Current . . . 1 µA TypicalExternal Capacitors . . . 4 × 0.1 µFAccepts 5-V Logic Input With 3.3-V SupplyAlways-Active Noninverting Receiver Output (ROUT1B)Alternative High-Speed Pin-Compatible Device (1 Mbit/s) for TRSF3238ESD Protection for RS-232 Interface Pins±15 kV — Human-Body Model (HBM)±8 kV — IEC61000-4-2, Contact Discharge±15 kV — IEC61000-4-2, Air-Gap DischargeAPPLICATIONSBattery-Powered SystemsPDAsNotebooksSubnotebooksLaptopsPalmtop PCsHand-Held EquipmentModemsPrintersRS-232 Bus-Pin ESD Protection Exceeds ±15 kV Using Human-Body Model (HBM)Meets or Exceeds the Requirements of TIA/EIA-232-F and ITU v.28 StandardsOperates With 3-V to 5.5-V VCCSupplyOperates up to 400 kbit/sFive Drivers and Three ReceiversAuto-Powerdown Plus Feature Enables Flexible Power-Down ModeLow Standby Current . . . 1 µA TypicalExternal Capacitors . . . 4 × 0.1 µFAccepts 5-V Logic Input With 3.3-V SupplyAlways-Active Noninverting Receiver Output (ROUT1B)Alternative High-Speed Pin-Compatible Device (1 Mbit/s) for TRSF3238ESD Protection for RS-232 Interface Pins±15 kV — Human-Body Model (HBM)±8 kV — IEC61000-4-2, Contact Discharge±15 kV — IEC61000-4-2, Air-Gap DischargeAPPLICATIONSBattery-Powered SystemsPDAsNotebooksSubnotebooksLaptopsPalmtop PCsHand-Held EquipmentModemsPrinters

Description

The TRS3238E consists of five line drivers, three line receivers, and a dual charge-pump circuit with ±15-kV ESD (HBM) protection on the driver output (DOUT) and receiver input (RIN) terminals. The device meets the requirements of TIA/EIA-232-F and provides the electrical interface between notebook and subnotebook computer applications. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply. In addition, the device includes an always-active noninverting output (ROUT1B), which allows applications using the ring indicator to transmit data while the device is powered down. This device operates 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 featured when the serial port and driver inputs are inactive. The auto-powerdown plus feature functions when FORCEON is low andFORCEOFFis high. During this mode of operation, if the device does not sense valid signal transitions on all receiver and driver inputs for approximately 30 s, the built-in charge pump and drivers are powered down, reducing the supply current to 1 µA. By disconnecting the serial port or placing the peripheral drivers off, auto-powerdown plus occurs if there is no activity in the logic levels for the driver inputs. Auto-powerdown plus can be disabled when FORCEON andFORCEOFFare high. With auto-powerdown plus enabled, the device activates automatically when a valid signal is applied to any receiver or driver input.INVALIDis high (valid data) if any 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.INVALIDis low (invalid data) if all receiver input voltages are between -0.3 V and 0.3 V for more than 30 µs. The TRS3238E consists of five line drivers, three line receivers, and a dual charge-pump circuit with ±15-kV ESD (HBM) protection on the driver output (DOUT) and receiver input (RIN) terminals. The device meets the requirements of TIA/EIA-232-F and provides the electrical interface between notebook and subnotebook computer applications. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply. In addition, the device includes an always-active noninverting output (ROUT1B), which allows applications using the ring indicator to transmit data while the device is powered down. This device operates 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 featured when the serial port and driver inputs are inactive. The auto-powerdown plus feature functions when FORCEON is low andFORCEOFFis high. During this mode of operation, if the device does not sense valid signal transitions on all receiver and driver inputs for approximately 30 s, the built-in charge pump and drivers are powered down, reducing the supply current to 1 µA. By disconnecting the serial port or placing the peripheral drivers off, auto-powerdown plus occurs if there is no activity in the logic levels for the driver inputs. Auto-powerdown plus can be disabled when FORCEON andFORCEOFFare high. With auto-powerdown plus enabled, the device activates automatically when a valid signal is applied to any receiver or driver input.INVALIDis high (valid data) if any 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.INVALIDis low (invalid data) if all receiver input voltages are between -0.3 V and 0.3 V for more than 30 µs.