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DS1852 Dataheets PDF



Part Number DS1852
Manufacturers Dallas Semiconductor
Logo Dallas Semiconductor
Description Optical Transceiver Diagnostic Monitor
Datasheet DS1852 DatasheetDS1852 Datasheet (PDF)

www.DataSheet4U.com DS1852 Optical Transceiver Diagnostic Monitor www.maxim-ic.com FEATURES § § § § § § § § § § § § § § Implements proposals of SFF-8472 at device address A2h [Note: requires use of external EEPROM at address A0h for full compliance.] Top View Scaleable four-input muxing analog-to-digital converter (ADC) Direct-to-digital temperature converter A Programmable alarm and warning conditions Temperature-compensated, programmable three-input muxing B fast comparator C Access tempera.

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www.DataSheet4U.com DS1852 Optical Transceiver Diagnostic Monitor www.maxim-ic.com FEATURES § § § § § § § § § § § § § § Implements proposals of SFF-8472 at device address A2h [Note: requires use of external EEPROM at address A0h for full compliance.] Top View Scaleable four-input muxing analog-to-digital converter (ADC) Direct-to-digital temperature converter A Programmable alarm and warning conditions Temperature-compensated, programmable three-input muxing B fast comparator C Access temperature, data, and device control through a 2-wire interface D Operates from 3V or 5V supplies E Packaging: 25-ball BGA Operating temperature: -40°C to +100°C Programming temperature: 0°C to +70°C 1 2 3 4 5 Three levels of security 5 x 5 BGA (0.8mm pitch) 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 temperaturecompensated 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. 1 of 25 061302 DS1852 PIN DESCRIPTIONS www.DataSheet4U.com Name Ball Locations VCC GND SDA D2, D4, E3 B3, C2, C4, D3 B5 Description Power-Supply Terminal. The DS1852 will support supply voltages ranging from +2.7V to +5.5V. Ground Terminal 2-Wire Serial Data. The serial data pin is for serial data transfer to and from the DS1852. The pin is open drain and may be wire-OR’ed with other open-drain or open-collector interfaces. 2-Wire Serial Clock. The serial clock input is used to clock data into the DS1852 on rising edges and clock data out on falling edges. Analog Input Pin (Bias Value). Input to A/D. Analog Input Pin (Power Level). Input to A/D. Analog Input Pin (Received Power). Input to A/D. Address Select Pin. If set to logic 0, the device address is A0h. If set to logic 1, the value in Table 3, byte D0h determines the chip ad.


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