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Analog Devices Inc./Maxim Integrated DS1852B-00C+
- Part No.:
- DS1852B-00C+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Specialized
- Package:
- 25-LFBGA, CSPBGA
- Datasheet:
-
DS1852B-00C+.pdf
- Description:
- IC INTERFACE SPECIALIZED 25BGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,153
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Product details
Overview
DS1852B-00C+ 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/5V supplies, supports -40°C to +100°C ambient, and integrates 127-byte EEPROM for security level 1 in a 25-ball BGA package.
For engineers reviewing the DS1852B-00C+ datasheet, DS1852B-00C+ pinout, DS1852B-00C+ application, or DS1852B-00C+ equivalent, key selection criteria include SFF-8472 compliance readiness (with external A0h EEPROM), 2-wire interface timing (100kHz/400kHz), analog input scaling calibration per channel, fast comparator trip-point programmability, and multi-level password-protected memory access.
Technical Context
The DS1852B-00C+ implements a dedicated monitoring architecture for optical transceivers: its 5-channel ADC (VCC, temperature, Bin, Pin, Rin) updates every 13ms nominal with 12-bit effective resolution, while internal scaling registers (C8h–CFh) enable full-scale calibration from 0.2V to 6.5535V per analog input. The 3-input muxing fast comparator delivers sub-10µs response with 8-bit temperature-dependent trip points (D8h–E7h).
Security is enforced via three hierarchical access levels: User (default read-only), Manufacturer Level 1 (customer data table access), and Manufacturer Level 2 (full memory/settings control), each requiring distinct 32-bit passwords stored in protected EEPROM locations (7Bh–7Eh entry, D3h–D6h level 1, factory-programmed level 2). All digital inputs (Din, RSin, Fin, Lin) are mirrored into Table 00h byte 6Eh for host visibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | +2.7V to +5.5V - supports both 3V and 5V system rails without level-shifting |
| Operating Temperature | -40°C to +100°C - qualified for industrial-grade optical module environments |
| ADC Resolution | 12-bit effective (16-bit register, LSBs undefined) - provides sufficient granularity for bias current, TX power, and received power monitoring |
| Fast Comparator Response | <10µs - enables real-time fault detection before thermal runaway or laser damage occurs |
| 2-Wire Interface Speed | 100kHz / 400kHz - compatible with standard and fast-mode I²C buses in host systems |
| EEPROM Capacity | 127 bytes (Level 1), 128 bytes (Level 2) - stores calibrated scaling factors, alarm thresholds, and security credentials |
| Package | 25-ball BGA, 5mm × 5mm, 0.8mm pitch - matches industry-standard SFP/SFP+ module footprint constraints |
Pinout & Package
Package: 25-ball BGA (5mm × 5mm, 0.8mm pitch), lead-free (RoHS-compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (D2, D4, E3) | Power supply input | Three distributed pins reduce IR drop and improve noise immunity for analog/digital sections |
| GND (B3, C2, C4, D3) | Ground reference | Four ground balls provide low-inductance return path for ADC, comparators, and I²C interface |
| SDA (B5) | I²C data line | Open-drain output requires external pull-up; supports wire-OR with other slave devices on same bus |
| SCL (A5) | I²C clock input | Input-only clock line synchronizes all serial transfers; tolerant of 100kHz/400kHz timing |
| Bin (A3) | Analog bias current input | Direct connection to laser diode bias monitor node; scaled by EEPROM register C8h |
| Pin (D1) | Analog TX power input | Connects to photodiode output for transmitted optical power measurement; scaled by EEPROM register C9h |
| Rin (A2) | Analog RX power input | Connects to receiver photodiode for received optical power; scaled by EEPROM register CAh |
| ASEL (B2) | Address select input | Logic high selects factory-default A2h I²C address; logic low sets address to A0h for SFF-8472 compliance |
| Din (C5) | Digital TX disable input | Mirrored to Table 00h byte 6Eh bit 7 - enables host software to detect hardware TX disable state |
| RSin (B4) | Digital rate select input | Mirrored to Table 00h byte 6Eh bit 4 - signals host whether module is operating at 1G/2G/10G rate |
| Fin (E5) | Digital TX fault input | Mirrored to Table 00h byte 6Eh bit 5 - indicates laser fault condition to host via memory-mapped status |
| Lin (A1) | Digital LOS input | Mirrored to Table 00h byte 6Eh bit 0 - reports loss-of-signal condition from receiver front-end |
Key Features
| Feature | Design Value |
|---|---|
| Temperature-compensated fast comparators | Three independent 8-bit trip-point registers (D8h–E7h) with temperature-dependent thresholds enable early warning of thermal drift in laser bias or receiver sensitivity |
| Per-channel analog scaling calibration | 16-bit scaling registers (C8h–CFh) allow precise full-scale adjustment for Bin, Pin, Rin, and VCC - eliminating need for external op-amp gain stages |
| Multi-level password security | Three-tiered access (User/Level 1/Level 2) prevents unauthorized modification of calibration data, alarm limits, and device identity - critical for OEM module certification |
| Integrated 2-wire interface | Native I²C slave operation with ACK polling, page writes, and sequential reads simplifies host firmware integration without requiring additional protocol translation logic |
| Real-time A/D update flag | Byte 6Fh (AD updated) provides atomic status bits indicating which of the five monitored parameters (temp, VCC, Bin, Pin, Rin) have been refreshed - avoids stale-data reads in time-critical diagnostics |
Applications
| SFP Transceiver Module Monitoring | GBIC Module Diagnostic Control |
|---|---|
Use Scenario: Real-time monitoring of laser bias current, transmitted optical power, and received signal strength in hot-pluggable SFP modules deployed in enterprise switches. IC Role / Device Role / Timing Role: DS1852B-00C+ serves as the primary diagnostic controller, performing periodic 13ms ADC conversions and updating memory-mapped registers accessible via host I²C. Use Value: Enables automatic laser shutdown on over-current or temperature excursion, meeting SFF-8472 Class I safety requirements without external supervision logic. | Use Scenario: Calibration and alarm management for legacy GBIC modules used in data center backbone routers where field-replaceable optics require standardized diagnostics. IC Role / Device Role / Timing Role: DS1852B-00C+ implements the SFF-8472 "transceiver monitor" function, providing host-accessible temperature, voltage, and optical power data through IEEE-defined memory map. Use Value: Eliminates need for custom firmware per module vendor - host reads standardized Table 00h addresses (60h–69h) for all monitored parameters. |
| Optical Line Card Health Management | Industrial Fiber-Optic Link Diagnostics |
Use Scenario: Centralized health monitoring of multiple SFP ports on telecom line cards where thermal derating and aging compensation must be applied across 48+ channels. IC Role / Device Role / Timing Role: DS1852B-00C+ provides calibrated analog measurements and temperature-compensated alarm flags that feed into FPGA-based health aggregation logic. Use Value: Reduces FPGA resource usage by offloading analog-to-digital conversion, scaling, and trip-point evaluation - freeing logic for higher-layer protocol processing. | Use Scenario: Harsh-environment fiber links in industrial automation where extended temperature range (-40°C to +100°C) and robust fault detection are required for machine vision or motion control networks. IC Role / Device Role / Timing Role: DS1852B-00C+ acts as the embedded diagnostic agent, using its fast comparators to trigger immediate hardware shutdown on LOS or TX fault conditions. Use Value: Meets IEC 61508 SIL-2 requirements for safe failure fraction by providing deterministic <10µs response to critical optical faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar optical transceiver monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX32660GWE+T | ARM Cortex-M4 MCU with integrated ADC, I²C, and flash; no native SFF-8472 memory map or fast comparators | Requires full firmware development for SFF-8472 compliance; suitable for custom diagnostics but not drop-in replacement | Select when flexible programmability and post-processing (e.g., FFT on optical noise) are needed beyond fixed-function monitoring |
| LM75BIMM/NOPB | Dedicated digital temperature sensor only; no ADC, comparators, EEPROM, or optical input support | Limited to thermal monitoring; cannot replace DS1852B-00C+ for full transceiver diagnostics | Select only if monitoring is restricted to ambient/module temperature without bias/power measurements |
Compared with MAX32660GWE+T and LM75BIMM/NOPB, the DS1852B-00C+ delivers purpose-built SFF-8472 functionality - including calibrated 4-input ADC, temperature-compensated fast comparators, and hierarchical security - enabling immediate compliance without firmware development or external component additions.
Availability
DS1852B-00C+ is available at Aetrix Electronics and suitable for SFP module manufacturing, GBIC-based network equipment, and industrial fiber-optic link designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for DS1852B-00C+ 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) is a semiconductor company specializing in precision analog, mixed-signal, and power management ICs for communications, computing, and industrial applications.
The DS1852B-00C+ belongs to Maxim's optical transceiver monitor product line, designed specifically to meet SFF-8472 diagnostic requirements in pluggable fiber modules - integrating ADC, temperature sensing, fast comparators, and secure memory in a single BGA package.
FAQ
What is the primary function of the DS1852B-00C+ in an optical transceiver module?
The DS1852B-00C+ serves as a dedicated SFF-8472-compliant transceiver monitor IC. It performs real-time analog measurements (temperature, VCC, laser bias current, TX power, RX power), executes temperature-compensated fast comparisons, manages secure EEPROM storage for calibration and alarms, and exposes all data via a standard 2-wire interface - enabling host systems to implement full diagnostic and safety functions without additional components.
Does the DS1852B-00C+ require an external EEPROM to achieve full SFF-8472 compliance?
Yes, the DS1852B-00C+ implements the SFF-8472 proposal at device address A2h but requires an external EEPROM at address A0h to store the mandatory IEEE identity table and extended diagnostic data. The internal 127-byte EEPROM supports security level 1 and calibration storage, but the A0h external device is necessary for complete GBIC-compliant memory mapping.
How does the DS1852B-00C+ handle temperature compensation for its fast comparators?
The DS1852B-00C+ implements temperature-dependent trip points for its three fast comparators (Bin, Pin, Rin). Each has eight unique temperature-dependent threshold values for Bin and four for Pin/Rin, programmed via EEPROM registers D8h–E7h. This allows trip points to shift with temperature - for example, lowering the TX power alarm threshold as temperature rises - preventing false alarms during normal thermal drift.
What security levels does the DS1852B-00C+ support, and how are they accessed?
The DS1852B-00C+ supports three security levels: User (default, read-only access to IEEE tables and status), Manufacturer Level 1 (read/write to customer data table via 32-bit password at D3h–D6h), and Manufacturer Level 2 (full memory and settings access via factory-programmed password). Access is granted by writing the correct 4-byte password to Table 00h addresses 7Bh–7Eh; passwords are write-only and cleared on power cycle.
Can the DS1852B-00C+ operate from both 3V and 5V supplies, and what is its valid voltage range?
Yes, the DS1852B-00C+ operates from a single supply ranging from +2.7V to +5.5V. It is fully functional across this range, supporting both 3V and 5V system rails without external regulators or level shifters. The analog monitoring circuitry becomes operational above the analog minimum voltage (between digital min and 2.7V), while I²C communication remains active even below that threshold.
DS1852B-00C+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 25-LFBGA, CSPBGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Applications:
- Monitors
- Interface:
- 2-Wire
- Voltage - Supply:
- 2.7V ~ 5.5V
- Supplier Device Package:
- 25-CSBGA (5x5)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
DS1852B-00C+ FAQ
1.How can I place an order for DS1852B-00C+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1852B-00C+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DS1852B-00C+ reliable?
The price and inventory of DS1852B-00C+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1852B-00C+ is usually 5 days.
3.What payment methods are accepted for DS1852B-00C+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1852B-00C+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1852B-00C+?
DS1852B-00C+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1852B-00C+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DS1852B-00C+?
For technical support, including DS1852B-00C+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1852B-00C+ requirements.
6.How does Aetrix verify that DS1852B-00C+ is sourced from the original manufacturer or authorized distributors?
All DS1852B-00C+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DS1852B-00C+ meets industry standards.
7.What is the process for return or replacement of DS1852B-00C+?
All DS1852B-00C+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1852B-00C+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DS1852B-00C+ part is unused and in its original packaging.
Return procedure for DS1852B-00C+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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