ISL83387E

±15kV ESD Protected, +3V to +5.5V, 1µA, 250kbps, RS-232 Transceivers and a Separate Logic Supply

OVERVIEW

The Intersil ISL83387E is a 3.0V to 5.5V powered RS-232 transceiver which meets ElA/TIA-232 and V.28/V.24 specifications, even at VCC = 3.0V. Additionally, it provides ±15kV ESD protection (IEC61000-4-2 Air Gap and Human Body Model) on transmitter outputs and receiver inputs (RS-232 pins). Targeted applications are PDAs, Palmtops, and notebook and laptop computers where the low operational, and even lower standby power consumption is critical. Efficient on-chip charge pumps, coupled with manual and enhanced automatic powerdown functions, reduce the standby supply current to a 1mA trickle. TSSOP packaging, and the use of small, low value capacitors ensure board space savings as well. Data rates greater than 250kbps are guaranteed at worst case load conditions.

The ISL83387E features a VL pin that adjusts the logic pin output levels and input thresholds to values compatible with the VCC powering the external logic (e.g., a UART).

This device includes an enhanced automatic powerdown function which powers down the on-chip power-supply and driver circuits. This occurs when all receiver and transmitter inputs detect no signal transitions for a period of 30 seconds. It power back up, automatically, whenever it senses a transition on any transmitter or receiver input.

KEY FEATURES

  • VL Supply Pin for Compatibility with Mixed Voltage Systems
  • ESD Protection for RS-232 I/O Pins to ±15kV (IEC61000)
  • Low Power, Pin Compatible Upgrade for MAX3387E
  • Manual and Enhanced Automatic Powerdown Features
  • Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
  • On-Chip Charge Pumps Require Only Four External 0.1µF Capacitors
  • Receivers Stay Active in Powerdown
  • Very Low Supply Current 300µA
  • Guaranteed Minimum Data Rate 250kbps
  • Wide Power Supply Range Single +3V to +5.5V
  • Low Supply Current in Powerdown State <1µA
  • Pb-Free Plus Anneal Available (RoHS Compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL83387E
Basic Information
Production Status
Mass Production
# of Rx
3
# of Tx
3
High ESD Protection
Yes
Data Rate
0.5 Mbps
Supply Voltage Vcc (Min) (V)
3
Supply Voltage Vcc (Max) (V)
5.5
Manual Shutdown
Yes
Auto Shutdown
Enhanced
Rx Disable
No
Capacitance Value
0.1 µF
IS Enabled (mA)
0.3
IS Disabled
1 µA
Qualification Level
Standard
Supply Voltage Vcc Range (V)
3 to 5.5
Can Sample
YES
Temperature Range
-40 to +85

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