DS2482-800 8-Channel 1-Wire Master GENERAL DESCRIPTION BENEFITS AND FEATURES 2 2 Allows Easy Interface Between an I C Micro Port The DS2482-800 is an I C-to-1-Wire bridge device and a 1-Wire Slave that interfaces directly to standard (100kHz max) or 2 2 o I C Host Interface Supports 100kHz and fast (400kHz max) I C masters to perform 2 2 400kHz I C Communication Speeds bidirectional protocol conversion between the I C o 8 Channels of Independently Operated master and any downstream 1-Wire slave devices. 1-Wire I/O Relative to any attached 1-Wire slave device, the o 1-Wire Master I/O with Selectable Active or DS2482-800 is a 1-Wire master. Internal factory- Passive 1-Wire Pullup trimmed timers relieve the system host processor o Provides Reset/Presence, 8-Bit, Single-Bit, from generating time-critical 1-Wire waveforms, and 3-Bit 1-Wire I/O Sequences supporting both standard and Overdrive 1-Wire o Standard and Overdrive 1-Wire communication speeds. To optimize 1-Wire Communication Speeds waveform generation, the DS2482-800 performs 2 o Three Address Inputs for I C Address slew-rate control on rising and falling 1-Wire edges Assignment and has a programmable feature to mask the fast Minimizes Line Noise, Reducing System EMI presence pulse edge that some 1-Wire slave devices o Slew-Controlled 1-Wire Edges can generate. Programmable strong pullup features Supports EEPROMs, Temp Sensors, or Other support 1-Wire power delivery to 1-Wire devices such 1-Wire Slaves That Have Momentary High Source as EEPROMs and sensors. The DS2482-800 Current Modes combines these features with eight independent o Strong 1-Wire Pullup Provided by an 2 1-Wire I/O channels. The IC slave address Internal Low-Impedance Signal Path assignment is controlled by three binary address o PCTLZ Output to Optionally Control an 2 inputs, resolving potential conflicts with other I C External MOSFET for Stronger Pullup Requirements slave devices in the system. Wide Operating Range: 2.9V to 5.5V, -40C to +85C APPLICATIONS 16-Pin SO Package (150 mils) Wireless Base Stations Central Office Switches ORDERING INFORMATION PBXs TEMP PIN- Rack-Based Servers PART RANGE PACKAGE Medical Clinical Diagnostic Equipment DS2482S-800+ -40 to +85C 16 SO DS2482S-800+T&R 16 SO -40 to +85C TYPICAL OPERATING CIRCUIT +Denotes a lead(Pb)-free/RoHS-compliant package. T&R = Tape and reel. PIN CONFIGURATION IO3 1 16 IO2 SCL 2 15 IO1 SDA 3 14 IO0 V 4 13 GND CC NC 5 12 IO4 AD2 6 11 IO5 AD1 7 10 IO6 AD0 8 9 IO7 1-Wire is a registered trademark of Maxim Integrated Products, Inc. 19-4932 Rev 5 12/14 DS2482-800: 8-Channel 1-Wire Master ABSOLUTE MAXIMUM RATINGS Voltage on Any Pin Relative to Ground -0.5V, +6V Maximum Current Into Any Pin 20mA Operating Temperature Range -40C to +85C Junction Temperature +150C Storage Temperature Range -55C to +125C Lead Temperature (soldering, 10s) +300C Soldering Temperature (reflow) +260C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = 2.9V to 5.5V, T = -40C to +85C, unless otherwise noted.) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 3.3V 2.9 3.3 3.7 Supply Voltage V V CC 5V 4.5 5.0 5.5 Operating Current I (Note 1) 0.75 mA CC 3.3V (Notes 2, 3) 1.9 1-Wire Input High V V IH1 5V (Notes 2, 3) 3.4 3.3V (Notes 2, 3) 0.75 1-Wire Input Low V V IL1 5V (Notes 2, 3) 1.0 1-Wire Weak Pullup Resistor R (Note 4) 800 1675 WPU 1-Wire Output Low V At 4mA load 0.4 V OL1 Standard (Notes 4, 16) 2.3 2.5 2.7 Active Pullup On Time t s APUOT Overdrive (Notes 4, 16) 0.4 0.5 0.6 0.3 V 3.2V, 1.5mA load CC Strong Pullup Voltage Drop V V STRPU V 5.2 V, 3mA load 0.5 CC 1 4.2 Standard (3.3V 10%) 3.3V Pulldown Slew Rate PD V/s SRC (Note 6) Overdrive (3.3V 10%) 5 22.1 5V Pulldown Slew Rate Standard (5.0V 10%) 2 6.5 PD V/s SRC (Note 6) Overdrive (5.0V 10%) 10 40 0.8 4 Standard (3.3V 10%) 3.3V Pullup Slew Rate (Note 6) PU V/s SRC 2.7 20 Overdrive (3.3V 10%) 1.3 6 Standard (5.0V 10%) 5V Pullup Slew Rate (Note 6) PU V/s SRC 3.4 31 Overdrive (5.0V 10%) Power-On Reset Trip Point V 2.2 V POR 1-Wire TIMING (Note 15) See Figures 4, 5, and 6 Standard 7.6 8 8.4 Write 1/Read Low Time t s W1L Overdrive 0.9 1 1.1 Standard 13.3 14 15 Read Sample Time t s MSR Overdrive 1.4 1.5 1.8 Standard 65.8 69.3 72.8 1-Wire Time Slot t s slot Overdrive 9.9 10.5 11.0 3.3V to 0V (Note 5) 0.54 3.0 Fall Time High-to-Low at Standard Speed (Note 6) 5.0V to 0V (Note 5) 0.55 2.2 t s F1 3.3V to 0V (Note 5) 0.10 0.59 Fall Time High-to-Low at Overdrive Speed (Note 6) 5.0V to 0V (Note 5) 0.09 0.44 2 of 23