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061302

FEATURES

§ Implements proposals of SFF-8472 at device address A2h

[Note: requires use of external EEPROM at address

A0h for full compliance.]

§ Scaleable four-input muxing analog-to-digital converter (ADC)

§ Direct-to-digital temperature converter

§ Programmable alarm and warning conditions

§ Temperature-compensated, programmable three-input muxing

fast comparator

§ Access temperature, data, and device control through a 2-wire

interface

§ Operates from 3V or 5V supplies

§ Packaging: 25-ball BGA

§ Operating temperature: -40°C to +100°C

§ Programming temperature: 0°C to +70°C

§ Three levels of security

§ 127 bytes EEPROM for security level 1

§ 128 bytes EEPROM for security level 2

§ Address space is GBIC compliant (with use of external EEPROM at device address A0h)

ORDERING INFORMATION

DS1852B-000

25-BALL BGA

DESCRIPTION

The DS1852 transceiver monitor manages all system monitoring functions in a fiber optic data

transceiver module, in accordance with proposal SFF-8472. Its functions include 2-wire communications

with the host system, EEPROM memory for identification, tracking, and calibration, an ADC with four

muxing inputs, three fast comparators, and a temperature sensor to monitor an optical transceiver. The

DS1852 has programmable alarm and warning flags for all four analog-to-digital (A/D) conversion

values (three user analog inputs plus supply voltage) as well as the temperature. These conditions can be

used to determine critical parameters inside each module. The three fast comparators have temperature-

compensated programmability. The temperature dependencies of the trip points aid in assessing critical

conditions.

The DS1852 is offered for sale free of any royalty or licensing fees. However, users should be aware that implementation of the SFF-8472

proposed specifications may require the use of an invention covered by patent rights. Since these patents relate to the SFF-8472 specification

and not to the DS1852 itself, licensing questions should be directed to Finisar Corp.

5 x 5 BGA (0.8mm pitch)

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Top View

DS1852

Optical Transceiver Diagnostic Monitor

www.maxim-ic.com