Device Information
 
 
ISL4243E Printer Friendly Version
 
QFN Packaged, ±15kV ESD Protected, +2.7V to +5.5V, 10nA, 250kbps, RS-232 Transmitters/Receivers
 
Datasheets,
Related Docs
& Simulations		DescriptionKey
Features		Parametric
Data		Application
Diagrams		Related
Devices
 
 
Ordering Information
 iBuy direct from Intersil  iBuy direct - out of stock  Request samples
 Check distributor inventory Green/Pb(Lead free) Device  Available in RoHS/Pb-Free  
Part No. Design-In
Status		 Temp. Package MSL Price
US $		 PB Free
ISL4243EIR Active Ind 32 Ld QFN 1 2.51   Disti-Buy Sample
ISL4243EIRZ Active Ind 32 Ld QFN 3 2.51 PB Free Buy Direct Disti-Buy Sample
ISL4243EIRZ-T Active Ind 32 Ld QFN T+R 3 2.56 PB Free Disti-Buy  
ISL4243EIR-T To Be
Discontinued		 Ind 32 Ld QFN T+R 1 2.56      
The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice.
MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020
SMD = Standard Microcircuit Drawing
 
  Description

The Intersil ISL424XE devices are 2.7V to 5.5V powered RS-232 transmitters/receivers which meet ElA/TIA-232 and V.28/V.24 specifications, even at VCC = 3.0V. Additionally, they provide ±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 automatic powerdown functions, reduce the standby supply current to a 10nA trickle. Tiny 5mm x 5mm Quad Flat No-Lead (QFN) 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 ISL424XE are 3 driver, 5 receiver devices that, coupled with the 5x5 QFN package, provide the industry's smallest, lowest power complete serial port suitable for PDAs, and laptop or notebook computers. The 5x5 QFN requires 60% less board area than a 28 lead TSSOP, and is nearly 20% thinner. The devices also include a noninverting alwaysactive receiver for "wake-up" capability.

The ISL4243E features an automatic powerdown function that powers down the on-chip power-supply and driver circuits. This occurs when an attached peripheral device is shut off or the RS-232 cable is removed, conserving system power automatically without changes to the hardware or operating system. It powers up again when a valid RS-232 voltage is applied to any receiver input.

 
  Key Features
 
  • Pb-free Available as an Option
  • Parameters Fully Specified for 10% Tolerance Supplies and Full Industrial Temp Range
  • Available in Small QFN (5mm x 5mm) Package which is 60% Smaller than a 28 Lead TSSOP
  • ESD Protection for RS-232 I/O Pins to ±15kV (IEC61000)
  • Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
  • RS-232 Compatible with VCC = 2.7V
  • On-Chip Voltage Converters Require Only Four External 0.1µF Capacitors
  • Manual and Automatic Powerdown Features
  • Receiver Hysteresis For Improved Noise Immunity
  • Guaranteed Minimum Data Rate 250kbps
  • Wide Power Supply Range Single +2.7V to +5.5V
  • Low Supply Current in Powerdown State 10nA
Related Documentation
 
Application Note(s)   Application Note(s):
 
Datasheet(s)   Datasheet(s):
 
Technical Brief(s)   Technical Brief(s):
 
Technical Homepage   Technical Homepage:
 
Design Model(s)   Design Model(s):
 
 
  Parametric Data
# of Tx3
# of Rx5
High ESDYes
Manual ShutdownYes
Auto ShutdownBasic
Rx DisableNo
Data Rate (Mbps).5
Cap. Value (µF).1
IS Enabled (mA).3
IS Disabled (µA).01
VCC Range (V)2.7 to 5.5
VCC (min) (V)2.7
VCC (max) (V)5.5
 
  Application Block Diagrams
 
 
 
Applications
 
  • Any Space Constrained System Requiring RS-232 Ports
    • Battery Powered, Hand-Held, and Portable Equipment
    • Laptop Computers, Notebooks
    • PDAs and Palmtops, Data Cables
    • Cellular/Mobile Phones, Digital Cameras, GPS
 
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