1
FN6001.4
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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ISL83385E
±15kV ESD Protected, +3V to +5.5V,
1 Microamp, 250kbps,
RS-232 Transmitters/Receivers
The Intersil ISL83385E contains 3.0V to 5.5V powered
RS-232 transmitters/receivers which meet ElA/TIA-232 and
V.28/V.24 specifications, even at V
CC
= 3.0V. 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 a manual powerdown function
reduces the standby supply current to a 1A trickle. Small
footprint 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. This device is fully compatible with 3.3V only
systems, mixed 3.3V and 5.0V systems, and 5.0V only
systems.
The single pin powerdown function (SHDN
= 0) disables all
the transmitters, while shutting down the charge pump to
minimize supply current drain.
Table 1 summarizes the features of the ISL83385E, while
Application Note AN9863 summarizes the features of each
device comprising the 3V RS-232 family.
Features
• ESD Protection for RS-232 I/O Pins to 15kV (IEC61000)
• Low Power, Pin Compatible Upgrade for MAX3385E
• Single SHDN Pin Disables Transmitters
• RS-232 Compatible Outputs at 2.7V
• Receivers Active in Powerdown
• Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
• Latch-Up Free
• On-Chip Voltage Converters Require Only Four External
0.1F Capacitors
• Receiver Hysteresis For Improved Noise Immunity
• Very Low Supply Current . . . . . . . . . . . . . . . . . . . . 0.3mA
• Guaranteed Minimum Data Rate . . . . . . . . . . . . . 250kbps
• Guaranteed Minimum Slew Rate . . . . . . . . . . . . . . . 6V/s
• Wide Power Supply Range . . . . . . . Single +3V to +5.5V
• Low Supply Current in Powerdown State. . . . . . . . . .<1A
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• Any System Requiring RS-232 Communication Ports
- Battery Powered, Hand-Held, and Portable Equipment
- Laptop Computers, Notebooks, Palmtops
- Modems, Printers and other Peripherals
- Digital Cameras
- Cellular/Mobile Phones
Ordering Information
PART
NUMBER
PART
MARKING
TEMP.
RANGE
(°C) PACKAGE
PKG.
DWG. #
ISL83385ECA 83385ECA 0 to 70 20 Ld SSOP M20.209
ISL83385ECAZ
(See Note)
83385ECAZ 0 to 70 20 Ld SSOP
(Pb-free)
M20.209
ISL83385EIA 83385EIA -40 to 85 20 Ld SSOP M20.209
ISL83385EIAZ
(See Note)
83385EIAZ -40 to 85 20 Ld SSOP
(Pb-free)
M20.209
ISL83385EIB 83385EIB -40 to 85 18 Ld SOIC M18.3
ISL83385EIBZ
(See Note)
83385EIBZ -40 to 85 18 Ld SOIC
(Pb-free)
M18.3
Add “-T” suffix for tape and reel.
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
Data Sheet January 16, 2005
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