ADM222ARZ-REEL

Overview

The ADM222ARZ-REEL is a high-speed RS-232 transceiver fabricated on BiCMOS technology, operating from a single 5 V power supply. It integrates two drivers and two receivers with transmission rates up to 200 kB/s. The device utilizes an internal charge pump requiring four 0.1 µF capacitors to generate ±10 V supplies for RS-232 signaling. Key electrical parameters include a typical quiescent current of 8 mA and a shutdown current of 0.1 µA. It features ±9 V output swings and ±30 V receiver input levels. The component operates within an industrial temperature range of -40°C to +85°C and is housed in an 18-lead SOIC package.

Feature Summary

• Integrates an efficient on-chip charge pump voltage converter that generates bipolar RS-232 levels from a single 5 V supply using small external capacitors.
• Includes a dedicated shutdown function that disables all transmit and receive blocks to minimize power consumption during inactive periods.
• Features TTL/CMOS compatible inputs with internal pull-up resistors and RS-232 inputs with internal pull-down resistors for noise immunity.
• Provides Schmitt trigger inputs on the receivers to ensure error-free data reception despite noisy signals or slow transition times.

Applications

• Computer serial communication ports
• Peripheral interface connections
• Modem link interfaces
• Printer port adapters
• Industrial instrument control systems

Procurement Notes

Verify the specific ordering suffix REEL against the manufacturer's official documentation to confirm reel packaging specifications. Ensure the component matches the RW-18 package option for surface-mount assembly. Confirm RoHS compliance status as indicated by the Z suffix in the base part number. Cross-reference the revision history to validate the datasheet version used for design-in.

Selection Notes

Select this component when a single 5 V supply is available and low standby power is required via the shutdown pin. Compare against the ADM232A if shutdown functionality is unnecessary, or the ADM242 if independent receiver enable control is needed. Verify that the 200 kB/s data rate meets system requirements. Ensure the 18-lead SOIC footprint fits the PCB layout constraints.

Part Context

This part belongs to the ADM222/ADM232A/ADM242 family of high-speed RS-232 drivers and receivers. It serves as a direct upgrade to older ADI RS-232 families like the AD230-AD241 series. The device is pin-compatible with industry-standard parts such as the MAX222, facilitating drop-in replacements in existing designs without schematic modifications.

Replacement Considerations

The ADM222ANZ is the leaded DIP equivalent. The ADM232A and ADM242 are pin-compatible variants within the same family offering different control logic options.