A dual RS-232 receivertransmitter that meets all the EIA RS-232C specifications while requiring only a single 5V supply. This significantly simplifies system design by removing the need to provide power supply voltages other than 5V. The IC has two on-board charge pump voltage convertors which generate 10V & -10V power supplies from the single 5V supply. The IC contains four level translators two of which convert TTLCMOS input levels into plusmn 9V RS-232 outputs ready for transmission & two of which convert RS-232 inputs to 5V TTLCMOS levels. The receivers have a nominal threshold of 1.3V a typical hysteresis of 0.5V & can operate with up to plusmn 30V inputs. Characteristics Supply voltage 5V plusmn 10 Output voltage swingplusmn 9VRS-232 input voltageplusmn 30V max Propagation delay 0.5micros Output resistance 300 Omega min RS-232 output short circuit currentplusmn 10m A ...

The MAX233 is a 2-line driverreceiver IC intended for all EIATIA-232E & V.28V.24 communication interfaces especially where no plusmn 12V supply is available. The device

Includes:: on-board voltage convertors that require no external capacitors which makes the IC suitable for battery-powered systems & applications where PCB space is critical. Data transfer rate is 120kbps. Supplied in a 20-pin DILpackage. Specifications Power supply 5V 5m A typical Rx ip voltage range-30V to 30VRS232 ip resistance 5k Omega typical Tx output resistance 300 Omega TTLCMOS output voltagelow 0.4V maxhigh Vcc
- 0.4 V Transition slew rate 4 Vmicros typical Typical propagation delay RS232 in-TTLCMOS out 6micros typical


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The MAX3232CPE has a proprietary low-dropout transmitter stage enabling true RS232 performance from 3V to 5.5 Vdc supplies. The internal power supply consists of a regulated dual charge pump that produces output voltages of 5.5V & -5.5V from an input voltage range of 3V to 5.5V. Requiring only four 0.1micro F external capacitors for use with the charge pump circuitry the device is guaranteed to run at data rates of 120kps while maintaining RS232 output levels. The MAX3232CPE has two receivers & two drivers & is ideal for 3.3V systems mixed 3.3V5V systems or 5V systems that require true RS232 performance. The device consumes only 250micro A has a 4 Vmicros slew rate & is pin & functionally compatible with the industry standard MAX232. Applications include computers notebooks palmtops battery powered equipment h&-held equipment & peripherals. Supplied in an 18-pin DIL package. ...

The MAX4427 is a dual non-inverting monolithic power MOSFET driver designed to convert TTLCMOS inputs to high voltagecurrent outputs. Delay times are virtually independent of VDD & the high current output drivers rapidly charge & discharge the gate capacitance of even the largest power MOSFETs to within millivolts of the supply rails. This produces the power MOSFETs minimum on resistance. The high speed device is ideal for switching power supplies & DCDC convertors as it minimises power loses. The device has easy-to-drive inputs that should be connected to ground if unused. Drivers can be paralleled by connecting both inputs & outputs together. Supplied in an 8-pin DIL package. Specifications Power supply 4.5V to 18 V Supply current 2.5m A typ 8m A max. Peak op current 1.5A at 18 V Output voltagehigh Vsub D Dsub
- 25m V min.low 25m V max. Output resistance 5 Omega typ 12 Omega max. Rise time 20ns typ. Fall time 20ns typ. Delay time 25ns typ.
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Ideal for all portable devices Foldable for easy portability Soft silicone tips & soft-touch rubber cord for great comfort & extended use Adjustable head-locking & memory headband with vertical ear entry 32andohmimpedance & 16-24000 Hz frequency response ...