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Home > Products > Integrated Circuits (ICs) > Interface > Controllers

Analog Devices Inc./Maxim Integrated DS2482S-800+

Name: DS2482S-800+
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS2482S-800+
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DS2482S-800+

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Controllers

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: DS2482S-800+.pdf

Description:: IC I2C TO 1WIRE BRIDGE 16SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

DS2482S-800+ from Maxim Integrated is an 8-channel I²C-to-1-Wire bridge IC that functions as a 1-Wire master on each of its eight independent IO lines (IO0–IO7), supports standard (69.3 µs slot) and Overdrive (10.5 µs slot) 1-Wire speeds, delivers programmable strong pullup for parasitic-power devices like DS18B20 temperature sensors and DS2431 EEPROMs, and operates from 2.9V to 5.5V across –40°C to +85°C in a 16-pin SO package.

For engineers reviewing the DS2482S-800+ datasheet, DS2482S-800+ pinout, DS2482S-800+ application, or DS2482S-800+ equivalent, key selection considerations include per-channel 1-Wire timing control, slew-rate-managed edges, active/strong pullup configuration, I²C address assignment via AD0–AD2, and compatibility with legacy 1-Wire slave devices requiring precise reset/presence detection and ROM search support.

Technical Context

The DS2482S-800+ integrates a self-timed 1-Wire controller with factory-trimmed oscillators for accurate tRSTL (600 µs), tMSR (14 µs), and tslot (69.3 µs standard / 10.5 µs Overdrive) generation, eliminating host CPU timing dependency. Its I²C interface complies with standard-mode (100 kHz) and fast-mode (400 kHz) specifications, with Schmitt-triggered SDA/SCL inputs and 400 pF bus capacitance tolerance.

Each of the eight 1-Wire channels features independent slew-controlled rising/falling edges (e.g., 3.3V pulldown slew rate: 1–4.2 V/µs standard, 5–22.1 V/µs Overdrive), configurable active pullup (APU) for controlled rise-time, and strong pullup (SPU) with ≤0.5 V drop at 3 mA - enabling reliable power delivery to 1-Wire EEPROMs during copy-to-memory operations and to parasitic sensors during conversion.

Key Specifications

Parameter	Value and Actual Design Meaning
1-Wire Channels	8 independent bidirectional I/O lines (IO0–IO7) - enables concurrent or time-multiplexed connection to multiple 1-Wire networks without external multiplexing.
I²C Interface Speed	Up to 400 kHz fast-mode - supports high-throughput command/data exchange with microcontrollers while maintaining full backward compatibility with 100 kHz systems.
1-Wire Timing Accuracy	tRSTL = 600 µs ±5%, tslot = 69.3 µs (standard) / 10.5 µs (Overdrive) - factory-trimmed oscillator ensures robust presence detection and bit sampling across voltage/temperature range.
Strong Pullup Capability	≤0.5 V drop at 3 mA (VCC ≥ 5.2 V) - sustains sufficient voltage headroom for 1-Wire devices requiring >2.8 V during high-current phases (e.g., DS2431 write cycle).
Slew Rate Control	Pulldown: 1–40 V/µs (3.3V/5V, standard/Overdrive); Pullup: 0.8–31 V/µs - reduces EMI and prevents signal overshoot on long or noisy 1-Wire buses.
Supply Voltage Range	2.9 V to 5.5 V - supports direct integration into both 3.3 V and 5 V system rails without level-shifting circuitry.
Operating Temperature	–40°C to +85°C - qualified for industrial and telecom infrastructure applications including wireless base stations and central office switches.

Pinout & Package

DS2482S-800+ is housed in a 16-pin SOIC package (150 mil width), with exposed pad not present and RoHS-compliant lead-free finish. Pin 5 (NC) is unconnected and must remain floating; pins AD0–AD2 set the 3-bit I²C slave address (7-bit address = 110XXXXb); all 1-Wire I/O pins (IO0–IO7) are electrically identical and independently controllable.

Pin/Terminal	Circuit Role	Design Meaning
IO0–IO7	1-Wire bidirectional I/O channel drivers	Each pin serves as a dedicated 1-Wire master port - supports reset/presence, read/write byte, single-bit, and triplet commands with internal timing control.
SCL	I²C serial clock input	Must be pulled up externally to VCC; accepts standard/fast-mode clocks up to 400 kHz with 0.6 µs setup/hold timing compliance.
SDA	I²C serial data I/O	Open-drain output with Schmitt trigger input; requires external pullup; handles ACK/NACK and data transfer per I²C specification.
VCC	Power supply input	Supplies core logic and 1-Wire drivers; bypass capacitor (≥0.1 µF) required near pin for stable operation across 2.9–5.5 V range.
GND	Ground reference	Common return path for I²C and all 1-Wire channels; low-impedance connection critical for noise immunity in multi-channel operation.
AD0–AD2	I²C address select inputs	Binary-encoded address bits (active-high); determine unique 7-bit I²C address (base 0x60–0x67) to avoid bus conflicts in multi-device systems.
NC	No connect	Pin 5 has no internal connection - must be left unconnected; routing to ground or VCC may cause mechanical stress or contamination risk.

Key Features

Feature	Design Value
8 independent 1-Wire channels	Enables parallel monitoring of up to eight separate 1-Wire sensor networks (e.g., rack-mounted server temperature zones) without shared bus contention or timing interference.
Programmable strong pullup (SPU)	Provides low-impedance VCC-connected drive during critical 1-Wire operations - essential for powering DS2431 EEPROM scratchpad writes and DS18B20 temperature conversions without external MOSFETs.
Slew-controlled 1-Wire edges	Reduces radiated emissions by limiting dV/dt on 1-Wire lines - meets CISPR 22 Class B EMI requirements in dense telecom equipment layouts.
Factory-trimmed 1-Wire timing	Eliminates need for host firmware calibration - guarantees tRSTL, tMSR, and tslot accuracy over full voltage/temperature range, simplifying qualification for medical diagnostic equipment.
I²C address configurability (AD0–AD2)	Supports up to eight DS2482S-800+ devices on one I²C bus - ideal for modular systems like PBX line cards where each module manages its own 1-Wire sensor set.

Applications

Wireless Base Station Monitoring	Central Office Switch Thermal Management
Use Scenario: Real-time temperature and voltage monitoring of RF power amplifiers and baseband processing modules using DS18B20 and DS2450 sensors distributed across multiple PCBs. IC Role / Device Role / Timing Role: DS2482S-800+ acts as 1-Wire master across eight isolated sensor strings, executing timed reset/presence and Overdrive-speed reads to minimize polling latency. Use Value: Enables deterministic 1-Wire communication under RF-noise conditions via slew-controlled edges and strong pullup, reducing missed readings in high-density RF environments.	Use Scenario: Distributed thermal sensing across line card shelves in carrier-grade switches, with each DS2482S-800+ managing eight DS1822 sensors per shelf. IC Role / Device Role / Timing Role: DS2482S-800+ provides independent channel selection and presence-detect validation per sensor string, ensuring fault isolation when individual 1-Wire branches fail. Use Value: Eliminates need for external bus switches or repeaters - eight hardware-isolated 1-Wire ports reduce single-point failure risk and simplify shelf-level diagnostics.
Rack-Based Server Environmental Control	Medical Clinical Diagnostic Equipment Calibration
Use Scenario: Monitoring ambient, inlet, and component temperatures inside 19-inch server racks using parasitic-powered DS18B20 sensors on multiple backplane segments. IC Role / Device Role / Timing Role: DS2482S-800+ supplies strong pullup during DS18B20 temperature conversions and executes ROM searches across eight discrete 1-Wire subnets per rack unit. Use Value: Guarantees reliable parasitic power delivery and accurate timing even with 1 nF bus capacitance - avoids conversion timeouts common with passive-pullup bridges.	Use Scenario: Connecting calibrated 1-Wire temperature probes (e.g., DS1922L) and humidity sensors (e.g., HDC1080 via 1-Wire adapter) to clinical analyzers requiring traceable environmental logging. IC Role / Device Role / Timing Role: DS2482S-800+ performs factory-trimmed reset/presence cycles and CRC-verified byte reads to ensure measurement integrity per IEC 62304 software safety requirements. Use Value: Internal timing accuracy eliminates host-dependent timing margins - critical for meeting ±0.1°C temperature accuracy claims in FDA-cleared diagnostic platforms.

Wireless Base Station Monitoring

Central Office Switch Thermal Management

Use Scenario: Real-time temperature and voltage monitoring of RF power amplifiers and baseband processing modules using DS18B20 and DS2450 sensors distributed across multiple PCBs.

IC Role / Device Role / Timing Role: DS2482S-800+ acts as 1-Wire master across eight isolated sensor strings, executing timed reset/presence and Overdrive-speed reads to minimize polling latency.

Use Value: Enables deterministic 1-Wire communication under RF-noise conditions via slew-controlled edges and strong pullup, reducing missed readings in high-density RF environments.

Use Scenario: Distributed thermal sensing across line card shelves in carrier-grade switches, with each DS2482S-800+ managing eight DS1822 sensors per shelf.

IC Role / Device Role / Timing Role: DS2482S-800+ provides independent channel selection and presence-detect validation per sensor string, ensuring fault isolation when individual 1-Wire branches fail.

Use Value: Eliminates need for external bus switches or repeaters - eight hardware-isolated 1-Wire ports reduce single-point failure risk and simplify shelf-level diagnostics.

Rack-Based Server Environmental Control

Medical Clinical Diagnostic Equipment Calibration

Use Scenario: Monitoring ambient, inlet, and component temperatures inside 19-inch server racks using parasitic-powered DS18B20 sensors on multiple backplane segments.

IC Role / Device Role / Timing Role: DS2482S-800+ supplies strong pullup during DS18B20 temperature conversions and executes ROM searches across eight discrete 1-Wire subnets per rack unit.

Use Value: Guarantees reliable parasitic power delivery and accurate timing even with 1 nF bus capacitance - avoids conversion timeouts common with passive-pullup bridges.

Use Scenario: Connecting calibrated 1-Wire temperature probes (e.g., DS1922L) and humidity sensors (e.g., HDC1080 via 1-Wire adapter) to clinical analyzers requiring traceable environmental logging.

IC Role / Device Role / Timing Role: DS2482S-800+ performs factory-trimmed reset/presence cycles and CRC-verified byte reads to ensure measurement integrity per IEC 62304 software safety requirements.

Use Value: Internal timing accuracy eliminates host-dependent timing margins - critical for meeting ±0.1°C temperature accuracy claims in FDA-cleared diagnostic platforms.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 1-Wire bridge applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
DS2482-100+	Single-channel version in 8-pin SO; identical register map, timing, and feature set per channel.	Suitable only for systems requiring one 1-Wire bus; lacks multi-zone monitoring capability.	Select DS2482-100+ when board space is constrained and only one sensor string is needed - avoids unused channel overhead.
MAX31826ATM+	Integrated ±0.5°C temperature sensor + 1-Wire master in 8-pin TDFN; no multi-channel support; fixed 1-Wire speed.	Targeted at compact thermal sensing nodes - combines sensing and bridging but cannot drive external 1-Wire EEPROMs or multi-device nets.	Choose MAX31826ATM+ for space-limited, single-sensor applications where integrated accuracy and small footprint outweigh flexibility.

Compared with DS2482-100+, the DS2482S-800+ provides eight times the 1-Wire channel density in the same SOIC footprint per channel; compared with MAX31826ATM+, it offers full programmability, strong pullup, Overdrive support, and external device compatibility - making it the only option for scalable, multi-sensor industrial monitoring.

Availability

DS2482S-800+ is available at Aetrix Electronics and suitable for wireless base stations, central office switches, and rack-based servers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant manufacturing.

Supply support for DS2482S-800+ 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 digital ICs for industrial, communications, and medical applications, with emphasis on reliability, low power, and integration.

The DS2482S-800+ belongs to Maxim's 1-Wire interface product line, engineered specifically to simplify host processor offload in systems requiring robust, multi-node 1-Wire sensor and memory interfacing across harsh operating environments.

FAQ

What is the maximum 1-Wire bus capacitance supported by the DS2482S-800+ at Overdrive speed?

The DS2482S-800+ supports a maximum 1-Wire bus capacitance of 300 pF when operating in Overdrive mode. This limit ensures reliable timing for tslot = 10.5 µs and proper sampling at tMSR = 1.5 µs. Exceeding 300 pF risks missed presence pulses or bit errors; for higher-capacitance buses, standard speed (1 nF max) or external repeaters must be used. The DS2482S-800+ does not auto-detect or compensate for excessive capacitance.

Does the DS2482S-800+ require external pullup resistors on its I²C SDA and SCL lines?

Yes, the DS2482S-800+ requires external pullup resistors on both SDA and SCL pins - typically 2.2 kΩ to 4.7 kΩ to VCC depending on bus capacitance and speed. The internal I²C interface uses open-drain outputs and Schmitt-trigger inputs, so external pullups are mandatory for proper logic-level establishment and noise immunity. The DS2482S-800+ itself does not provide internal I²C pullups.

How does the DS2482S-800+ handle short circuits on a 1-Wire channel?

The DS2482S-800+ detects shorts during the 1-Wire Reset command by sampling the line at tSI (7.5 µs after reset start); if logic 0 is present, the Status Register SD bit is set. The DS2482S-800+ automatically disables further 1-Wire activity on that channel until cleared by host software. It does not latch or auto-recover - the host must read SD, isolate the faulty branch, and issue a new Reset to resume operation. No damage occurs within absolute maximum ratings.

Can the DS2482S-800+ simultaneously communicate with multiple 1-Wire slaves on different channels?

No, the DS2482S-800+ operates one 1-Wire channel at a time - only the selected channel (via Channel Select command) is active for 1-Wire communication. While IO0–IO7 are physically independent, time-multiplexing is required: the host must issue Channel Select before each 1-Wire command sequence. True simultaneous multi-channel operation is not supported by the DS2482S-800+ architecture.

What happens to the strong pullup (SPU) setting after a 1-Wire Write Byte command completes?

When SPU is enabled, the DS2482S-800+ maintains strong pullup until one of three events occurs: (1) the next 1-Wire command begins, (2) the Configuration Register is written with SPU = 0, or (3) a Device Reset command is issued. Upon termination, the SPU bit clears automatically. The DS2482S-800+ does not extend strong pullup beyond the defined 1-Wire protocol window - it strictly follows the timing in Figure 3 of the datasheet.

DS2482S-800+ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Package/Case:: 16-SOIC (0.154", 3.90mm Width)

Programmable:: Not Verified

Protocol:: 1-Wire®

Function:: Bridge, 1-Wire® to I2C

Interface:: I2C

Standards:: -

Voltage - Supply:: 3.3V, 5V

Current - Supply:: 750µA

Operating Temperature:: -40°C ~ 85°C

Supplier Device Package:: 16-SOIC

Grade:: -

Qualification:: -

DS2482S-800+ FAQ

1.How can I place an order for DS2482S-800+ through Aetrix?

Please submit a Request for Quotation (RFQ) for DS2482S-800+ 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 DS2482S-800+ reliable?

The price and inventory of DS2482S-800+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS2482S-800+ is usually 5 days.

3.What payment methods are accepted for DS2482S-800+?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS2482S-800+ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DS2482S-800+?

DS2482S-800+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DS2482S-800+ 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 DS2482S-800+?

For technical support, including DS2482S-800+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS2482S-800+ requirements.

6.How does Aetrix verify that DS2482S-800+ is sourced from the original manufacturer or authorized distributors?

All DS2482S-800+ 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 DS2482S-800+ meets industry standards.

7.What is the process for return or replacement of DS2482S-800+?

All DS2482S-800+ units undergo pre-shipment inspection (PSI). If there is an issue with DS2482S-800+, 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 DS2482S-800+ part is unused and in its original packaging.

Return procedure for DS2482S-800+:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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