DS1864 Maxim Integrated Products, DS1864 Datasheet

DS1864

Manufacturer Part Number

DS1864

Description

SFP Laser Controller and Diagnostic IC

Manufacturer

Maxim Integrated Products

Datasheet

1.DS1864.pdf (72 pages)

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Meier Automation Equipment Co., Limited

Part Number:

DS1864-RES

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Part Number:

DS1864S

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The DS1864 is an SFF-8472 multisource agreement

(MSA)-compliant laser controller/monitor that is ideal for

SFP optical-transceiver module designs. It controls laser

driver bias and modulation currents through a pair of tem-

perature-controlled current-sink DACs. System diagnos-

tics are provided by monitoring three analog inputs, V

and temperature through the internal temperature sensor.

The device also contains all EEPROM required by the

SFF-8472 MSA, including all A0h and A2h EEPROM. The

DS1864’s memory map can be configured to be compati-

ble with both the DS1852/DS1856 and the DS1859 mem-

ory maps. Additionally, memory is secured with customer-

configurable two-level password protection.

Eye-safety features are integrated by three fast-trip

comparators that monitor transmit-power high, transmit-

power low, and bias current. The fast-trip comparators

drive a FET driver output to disable the laser in the case

of eye safety violation.

With its integrated laser driver control, system diagnos-

tics, eye-safety features, and internal temperature sen-

sor, the DS1864 provides an ideal solution for SFP

optical transceiver modules by improving system perfor-

mance, reducing board space, and simplifying design.

Rev 0; 4/06

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

TOP VIEW

RSELOUT

SFP Optical Transceiver Modules

Laser Control and Monitoring

INTX-F

INLOS

SDA

N.C.

SCL

IN1

5mm x 5mm

General Description

DS1864

TQFN

Pin Configuration

Applications

______________________________________________ Maxim Integrated Products

DAC0

GND

DAC1

MON1P

MON1N

N.C.

SFP Laser Controller and

♦ SFF-8472 MSA Compatible

♦ Five Monitored Channels (Temperature, V

♦ Two Linear 8-Bit Current-Sink DACs

♦ Three Fast-Trip Comparators (Tx Power High,

♦ Flexible, Two Level Password Scheme Provides

♦ Provides All Optional and Required SFF-8472

♦ I

♦ Operates from a 3.3V or 5V Supply

♦ -40°C to +95°C Operating Temperature Range

♦ 28-Pin TQFN Package (5mm x 5mm)

+Denotes lead-free only package.

*Purchase of I

Inc., or one of its sublicensed Associated Companies, conveys

a license under the Philips I

ponents in an I

the I

Typical Operating Circuit appears at end of data sheet.

DS1864T

DS1864T+

MON1, MON2, MON3)

Tx Power Low, and Bias Current) for Eye Safety

Three Levels of Security

MSA EEPROM (Both A0h and A2h Memory)

C-Compatible Serial Interface

PART

Three External Analog Inputs (MON1, MON2,

MON3) Support Internal and External

Calibration

Enhanced RSSI Monitoring (26dB Range, 0.5dB

Accuracy)

Scalable Dynamic Range for External Analog

Inputs

Internal Direct-to-Digital Temperature Sensor

Alarm and Warning Flags for All Monitored

Channels

Two User-Selectable Full-Scale Ranges (0.5mA

or 1.5mA)

Values Changeable Every 2°C

C Standard Specification as defined by Philips.

C components from Maxim Integrated Products,

C system, provided that the system conforms to

-40°C to +95°C

TEMP RANGE

Ordering Information

Diagnostic IC

C Patent Rights to use these com-

28 TQFN (5mm x 5mm)

PIN-PACKAGE

Features

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