ICL3217E
Low Power, +3V To +5.5V, 250kbps, RS-232 Transmitters/Receivers

Key Features

• Pb-Free Available as an Option (see Ordering Info)
• ESD Protection for RS-232 I/O Pins to ±15kV (IEC61000)
• 5V Lower Power Replacement for MAX207E, HIN207E, HIN237E
• Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
• Latch-Up Free
• On-Chip Voltage Converters Require Only Four External 0.1µF Capacitors
• RS-232 Compatible with VCC = 2.7V
• Automatic Powerdown (ICC = 1µA, ICL3217E Only)
• Receiver Hysteresis For Improved Noise Immunity
• Guaranteed Minimum Data Rate 250kbps
• Guaranteed Minimum Slew Rate 6V/µs
• Wide Power Supply Range Single +3V to +5.5V

Description

The Intersil ICL32X7E devices are 3V to 5.5V powered RS-232 transmitters (five)/receivers (three) 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 ±15kV Human Body Model protection on transmitter outputs and receiver inputs (RS-232 pins). Targeted applications are ISDN Terminal Adaptors, PDAs, Palmtops, peripherals, and notebook and laptop computers where the low operational, and even lower standby, power consumption is critical. The ICL3217E's efficient on-chip charge pumps, coupled with an automatic powerdown function, reduces the standby supply current to a 1µA 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 family is fully compatible with 3.3V-only systems, mixed 3.3V and 5V systems, and 5V-only systems, and is a lower power, pin-for-pin replacement for '207E and '237E type devices.

The ICL3217E features an automatic powerdown function which 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. The ICL3217E powers up again when a valid RS-232 voltage is applied to any receiver input.

Table 1 summarizes the features of the devices represented by this data sheet, while application Note AN9863 summarizes the features of each device comprising the ICL32XXE 3V family.

Applications

• Battery Powered, Hand-Held, and Portable Equipment
• Laptop Computers, Notebooks, Palmtops
• Modems, Printers and other Peripherals
• ISDN Terminal Adaptors and Set Top Boxes
• Related Literature
• Technical Brief TB363, Guidelines for Handling and Processing Moisture Sensitive Surface Mount Devices (SMDs)