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TRS3243E

Features: ` Single-Chip and Single-Supply Interface for IBM™ PC/AT™ Serial Port` ESD Protection for RS-232 Bus Pins ±15-kV Human-Body Model (HBM) ±8-kV IEC61000-4-2, Contact Discharge ±15-kV IEC61000-4-2, Air-Gap Discharge` Meets or Exceeds Requirements of TIA/EIA-232-F and ITU v.28...

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SeekIC No. : 004528191 Detail

TRS3243E: Features: ` Single-Chip and Single-Supply Interface for IBM™ PC/AT™ Serial Port` ESD Protection for RS-232 Bus Pins ±15-kV Human-Body Model (HBM) ±8-kV IEC61000-4-2, Contact Discharge ...

TRS3243E Data Sheet

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Part Number:
TRS3243E
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

` Single-Chip and Single-Supply Interface for IBM™ PC/AT™ Serial Port
` ESD Protection for RS-232 Bus Pins
   ±15-kV Human-Body Model (HBM)
   ±8-kV IEC61000-4-2, Contact Discharge
   ±15-kV IEC61000-4-2, Air-Gap Discharge
` Meets or Exceeds Requirements of TIA/EIA-232-F and ITU v.28 Standards
` Operates With 3-V to 5.5-V VCC Supply
` Always-Active Noninverting Receiver Output (ROUT2B)
` Designed to Transmit at a Data Rate up to 500 kbit/s
` Low Standby Current . . . 1 mA Typ
` External Capacitors . . . 4 *0.1 F
` Accepts 5-V Logic Input With 3.3-V Supply
` Designed to Be Interchangeable With Industry Standard '3243E Devices
` Serial-Mouse Driveability 
` Auto-Powerdown Feature to Disable Driver Outputs When No Valid RS-232 Signal Is Sensed
` Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), and Thin Shrink Small-Outline (PW) Packages


Application

· Battery-Powered Systems
· PDAs
· Notebooks
· Laptops
· Palmtop PCs
· Hand-Held Equipment


Pinout

Connection Diagram


Specifications

  MIN MAX UNIT
VCC  Supply voltage range(2) -0.3 6 V
V+   Positive output supply voltage range(2) -0.3 7 V
V   Negative output supply voltage range(2) 0.3 -77 V
V+ V Output supply voltage difference(2)   13 V
VI   Input voltage range Driver (FORCEOFF, FORCEON) -0.3 6 V
Receiver -25 25
VO  Output voltage range Driver -13.2 13.2 V
Receiver (INVALID) -0.3 VCC + 0.3
JA  Package thermal impedance(3) (4) DB package   62 /W
DW package   46
PW package   62
       Lead temperature 1,6 mm (1/16 in) from case for 10 s   260
Tstg Storage temperature range -65 150

(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device.

These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

(2) All voltages are with respect to network GND.

(3) Maximum power dissipation is a function of TJ(max), JA, and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(max) - TA)/JA. Operating at the absolute maximum TJ of 150 can affect reliability.

(4) The package thermal impedance is calculated in accordance with JESD 51-7.


Description

The TRS3243E device consists of three line drivers, five line receivers, and a dual charge-pump circuit with ±15-kV ESD (HBM and IEC61000-4-2, Air-Gap Discharge) and ±8-kV ESD (IEC61000-4-2, Contact Discharge) protection on serial-port connection pins. The TRS3243E meets the requirements of TIA/EIA-232-F and provides the electrical interface between an asynchronous communication controller and the serial-port connector. This combination of drivers and receivers matches that needed for the typical serial port used in an IBM PC/AT, or compatible. The charge pump and four small external capacitors of TRS3243E allow operation from a single 3-V to 5.5-V supply. In addition, the device includes an always-active noninverting output (ROUT2B), which allows applications using the ring indicator to transmit data while the device is powered down. The TRS3243E operates at data signaling rates up to 250 kbit/s and a maximum of 30-V/ms 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 TRS3243E does not sense a valid RS-232 signal, the driver outputs are disabled. If FORCEOFF is set low, both drivers and receivers (except ROUT2B) are shut off, and the supply current is reduced to 1 mA. Disconnecting the serial port or turning off the peripheral drivers causes the auto-powerdown condition to occur.

Auto-powerdown of TRS3243E can be disabled when FORCEON and FORCEOFF are high, and should be done when driving a serial mouse. With auto-powerdown enabled, the device is activated automatically when a valid signal is applied to any receiver input. The INVALID output is used to notify the user if an RS-232 signal is present at any receiver input. INVALID is high (valid data) if any receiver input voltage of TRS3243E  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 ms. INVALID is low (invalid data) if all receiver input voltages are between 0.3 V and 0.3 V for more than 30 ms. Refer to Figure 5 for receiver input levels.

The TRS3243EC is characterized for operation from 0 to 70. The TRS3243EI is characterized for operation from 40 to 85.




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