ADM208ARSZ-REEL

Overview

The ADM208ARSZ-REEL is a CMOS RS-232 line driver and receiver manufactured by Analog Devices Inc. It operates from a single +5 V supply, utilizing internal charge pumps to generate the ±10 V required for EIA-232-E compliance without external voltage sources. The device integrates four drivers and four receivers, supporting data rates up to 120 kB/s. It features Schmitt-trigger inputs with hysteresis for noise immunity and includes internal pull-up/pull-down resistors on inputs. The component is housed in a 24-lead Shrink Small Outline Package (SSOP) and is rated for an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates dual charge pump voltage converters to generate ±10 V supplies from a single 5 V input.
• Provides four TTL/CMOS-to-RS-232 drivers and four RS-232-to-TTL/CMOS receivers.
• Features Schmitt-trigger receiver inputs with hysteresis to ensure error-free reception in noisy environments.
• Includes internal 400 kΩ pull-up resistors on transmitter inputs and 5 kΩ pull-down resistors on receiver inputs.

Applications

• EIA-232-E and V.28 communications interfaces
• Battery-powered equipment requiring low power consumption
• Computers and peripheral systems
• Modems and printers

Procurement Notes

Verify that the specific ordering suffix matches the required package type and RoHS compliance status. Confirm the reel quantity aligns with production needs. Ensure the temperature grade corresponds to the intended operating environment. Cross-reference the manufacturer part number with official distributor catalogs to validate authenticity and revision level before finalizing procurement orders.

Selection Notes

Select this component when a single 5 V supply is available but ±12 V rails are absent. Choose the ADM208 over variants like the ADM206 or ADM211 if shutdown control or enable pins are not required. Verify that the 24-pin SSOP footprint fits the PCB layout constraints. Consider the 120 kB/s data rate limit against system requirements.

Part Context

The ADM208 is part of the ADM2xx family of RS-232 transceivers designed for applications where standard ±12 V supplies are unavailable. It serves as a direct replacement for older AD2xx series devices and offers pin compatibility with MAX206-MAX213 families. The device simplifies interface design by eliminating the need for external voltage inversion circuits.

Replacement Considerations

The ADM208ANZ and ADM208ARZ are functionally equivalent alternatives differing primarily in packaging (PDIP vs. SOIC). For surface mount designs requiring identical electrical characteristics, verify pinout compatibility with existing layouts. No other direct substitutes within the same datasheet share the exact 4-driver/4-receiver configuration without additional control features.