ADM1385ARSZ

Overview

The ADM1385ARSZ is a low-power, dual-channel RS-232 transceiver designed for operation from a single 3.3 V power supply. It operates within a voltage range of 3.0 V to 5.5 V and supports data rates up to 460 kbps. The device includes two drivers and two receivers, utilizing four external 0.1 μF capacitors for its internal charge pump. Key features include a driver disable mode (DD pin) and a complete shutdown mode (SD pin), which reduces quiescent current to less than 0.5 μA. It conforms to EIA-232E specifications and is housed in a 20-lead SSOP package.

Feature Summary

• Integrated charge pump generates required RS-232 voltage levels using only four small external capacitors.
• Provides distinct driver disable and full shutdown modes to minimize power consumption in portable applications.
• Receivers feature Schmitt-trigger inputs with hysteresis to ensure reliable signal reception under noisy conditions.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and RoHS compliance status. Ensure that the procurement channel provides valid traceability for Analog Devices components. Confirm availability through authorized distributors as direct stock information may vary by region.

Selection Notes

Select this component when a single 3.3 V supply is available and low power consumption is critical. The ADM1385 offers a complete shutdown capability not present in the basic ADM3202 variant. Verify that the 20-lead SSOP footprint matches the target PCB layout requirements compared to other package options in the series.

Part Context

This part belongs to the ADM3202/ADM3222/ADM1385 family of RS-232 line drivers and receivers. It serves as an upgrade or alternative to legacy parts like the MAX3222 and LTC1385. The device is functionally similar to the ADM3222 but lacks the receiver enable pin, offering instead a dedicated driver disable control for optimized power management.

Replacement Considerations

The ADM1385 is pin-compatible with the LTC1385 CG. It can replace the ADM3222 if the receiver enable functionality is not required. Verify compatibility with existing designs intended for the MAX3222 or MAX3232 families.