Analog Devices Inc./Maxim Integrated DS1852B-000/C

Overview

DS1852B-000/C from Maxim Integrated is a fiber-optic transceiver diagnostic monitor IC implementing SFF-8472 proposal at device address A2h, featuring a 4-input muxing ADC, direct-to-digital temperature sensor, and three temperature-compensated fast comparators. It operates from 3V or 5V supplies, supports 2-wire interface communication, and integrates 127-byte EEPROM for security level 1 in a 25-ball BGA package for optical module monitoring.

For engineers reviewing the DS1852B-000/C datasheet, DS1852B-000/C pinout, DS1852B-000/C application, or DS1852B-000/C equivalent, key selection criteria include SFF-8472 compliance readiness, 13ms ADC conversion cycle time, -40°C to +100°C operating temperature range, and support for external EEPROM at A0h for full GBIC-compliant memory mapping.

Technical Context

The DS1852B-000/C functions as a dedicated SFF-8472-compliant transceiver monitor with integrated 5-channel analog monitoring (VCC, temperature, Bin, Pin, Rin), where each channel updates every 13ms (nominal) using a 16-bit ADC with only upper 12 bits valid. Its 3-input muxing fast comparator responds in <10µs and supports temperature-dependent trip points-eight unique values for Bin, four for Pin/Rin-programmed via Table 03h EEPROM addresses D8h–E7h.

Security is implemented across three levels: default user access (read-only IEEE identity table), manufacturer level 1 (customer data table access with 32-bit password at D3h–D6h), and level 2 (full memory/feature access with factory-programmed password). The 2-wire interface supports both standard (100kHz) and fast mode (400kHz) operation, with open-drain SDA/SCL pins and ASEL pin selecting between A0h (ASEL = 0) and A2h (ASEL = 1) device addressing.

Key Specifications

Pinout & Package

DS1852B-000/C is housed in a 5 × 5 mm, 25-ball BGA package with 0.8 mm pitch. Ball layout follows top-view labeling (A–E rows, 1–5 columns), with 8 no-connect (NC) balls and redundant power/ground connections for noise immunity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar transceiver monitor applications.

Compared with MAX32664A and LM75BIMM/NOPB, DS1852B-000/C delivers turnkey SFF-8472 compliance with integrated 5-channel analog monitoring, temperature-compensated fast alarms, and three-tier security - eliminating host-side protocol translation and enabling immediate deployment in standards-based optical modules.

Availability

DS1852B-000/C is available at Aetrix Electronics and suitable for fiber channel transceivers, SFP+ optical modules, and industrial Ethernet media converters requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for DS1852B-000/C includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for communications, computing, and industrial applications.

The DS1852B-000/C belongs to Maxim's optical transceiver monitoring product line, engineered specifically to meet SFF-8472 diagnostic requirements in pluggable fiber optic modules with minimal external components.

FAQ

What is the primary function of the DS1852B-000/C in an optical transceiver module?

The DS1852B-000/C serves as a dedicated SFF-8472-compliant diagnostic monitor IC that measures and reports temperature, supply voltage (VCC), laser bias current (Bin), transmit power (Pin), and received power (Rin) via its integrated 5-channel ADC. It also provides programmable alarm/warning flags, fast comparators, and EEPROM storage - all accessible through a 2-wire interface. This enables real-time health monitoring and fault detection without host processor intervention, making DS1852B-000/C essential for standards-compliant optical modules.

Does the DS1852B-000/C require an external EEPROM to achieve full SFF-8472 compliance?

Yes, the DS1852B-000/C implements the SFF-8472 proposal at device address A2h but requires an external EEPROM at address A0h to store mandatory GBIC identification and calibration data for full compliance. The internal 127-byte EEPROM (security level 1) supports configuration and alarm thresholds, but the A0h external device holds the IEEE-defined memory map required by host systems. Without it, DS1852B-000/C remains functional for analog monitoring but fails SFF-8472 conformance testing.

How does the DS1852B-000/C handle temperature compensation for its fast comparators?

The DS1852B-000/C implements temperature-dependent trip points for its three fast comparators: Bin supports eight unique temperature bins, while Pin and Rin each support four. These trip values are stored in Table 03h EEPROM addresses D8h–E7h and dynamically adjust comparator thresholds based on real-time die temperature. This ensures consistent fault detection across the -40°C to +100°C operating range - for example, raising the Bin alarm threshold as temperature increases to avoid false laser overcurrent triggers. DS1852B-000/C performs this compensation in hardware, eliminating need for host-side correction algorithms.

What are the security levels supported by the DS1852B-000/C, and how do they affect memory access?

The DS1852B-000/C implements three security levels: User (default after power-up, read-only access to IEEE identity table and monitoring registers), Manufacturer Level 1 (127-byte EEPROM access with 32-bit password at D3h–D6h), and Manufacturer Level 2 (full memory and feature access with factory-programmed password). Password entry occurs via Table 00h bytes 7Bh–7Eh. Level 2 access grants authority over all settings including calibration factors and alarm thresholds, while Level 1 restricts writes to customer-specific data. DS1852B-000/C enforces these tiers strictly - no privilege escalation without correct password entry.

Can the DS1852B-000/C operate from both 3V and 5V supplies, and what are the implications for system design?

Yes, DS1852B-000/C operates from +2.7V to +5.5V, supporting both 3V and 5V supply rails without external regulators or level shifters. Its VCC pins (D2, D4, E3) accept either voltage, and internal circuitry auto-scales reference voltages for ADC and comparators. This dual-supply capability simplifies board design in mixed-voltage optical modules - for instance, allowing DS1852B-000/C to share a 3.3V rail with microcontrollers while interfacing with 5V analog front-ends. The specified 13ms ADC update rate and 400kHz I²C speed remain valid across the entire supply range.