ADM1385ARSZ-REEL7

Overview

The ADM1385ARSZ-REEL7 is a low-power, dual-channel RS-232 transceiver designed for operation from a single 3.3 V power supply. It supports data rates up to 460 kbps and conforms to EIA-232E specifications. The device incorporates an internal charge pump requiring four external 0.1 μF capacitors to generate the necessary voltage levels. Key features include a driver disable mode and a complete shutdown capability that reduces quiescent current to less than 0.5 μA. It is housed in a 20-lead SSOP package.

Feature Summary

• Integrated charge pump enables operation from a single 3.3 V supply using minimal external capacitance.
• Includes dedicated driver disable and complete shutdown modes for significant power reduction.
• Features Schmitt-trigger receiver inputs with hysteresis to ensure reliable signal reception.
• Internal pull-down resistors on receiver inputs prevent undefined logic states when unconnected.

Applications

• General-purpose RS-232 data links
• Portable instruments
• Printers and palmtop computers

Procurement Notes

Verify the specific ordering suffix REEL7 corresponds to tape and reel packaging requirements. Confirm RoHS compliance status indicated by the Z suffix if environmental regulations apply. Ensure the 20-lead SSOP footprint matches the target PCB layout constraints before finalizing procurement orders.

Selection Notes

Select this component when a single 3.3 V supply is available and low power consumption is critical. The ADM1385 differs from the ADM3222 by offering a driver disable mode rather than a three-state receiver enable. Verify that the required data rate does not exceed 460 kbps under maximum load conditions.

Part Context

This part belongs to the ADM3202/ADM3222/ADM1385 family of low-power RS-232 line drivers and receivers. These devices serve as upgrades for legacy MAX3222/MAX3232 and LTC1385 components. The ADM1385 specifically targets applications requiring distinct driver control and deep sleep capabilities within a compact surface-mount form factor.

Replacement Considerations

The ADM1385 is pin-compatible with the LTC1385 CG. Designers upgrading from older MAX3222 or MAX3232 designs should verify that the specific shutdown and disable pin configurations align with their existing circuit schematics.