Single-Channel 1-Wire Master DS2482-100 General Description Benefits and Features 2 2 The DS2482-100 is an I C-to-1-Wire bridge device Allows Easy Interface Between a I C Microport and a that interfaces directly to standard (100kHz max) or fast 1-Wire Slave 2 (400kHz max) I C masters to perform bidirectional pro- 2 I C Host Interface Supports 100kHz and 400kHz 2 tocol conversion between the I C master and any 2 I C Communication Speeds downstream 1-Wire slave devices. Relative to any 1-Wire Master IO with Selectable Active or Passive attached 1-Wire slave device, the DS2482-100 is a 1-Wire Pullup 1-Wire master. Internal, factory-trimmed timers relieve the system host processor from generating time-critical Provides Reset/Presence, 8-Bit, Single-Bit, and 1-Wire waveforms, supporting both standard and over- 3-Bit 1-Wire IO Sequences drive 1-Wire communication speeds. To optimize Standard and Overdrive 1-Wire Communication 1-Wire waveform generation, the DS2482-100 performs Speeds slew-rate control on rising and falling 1-Wire edges and 2 Two Address Inputs for I C Address Assignment provides additional programmable features to match Minimizes Line Noise Reducing System EMI drive characteristics to the 1-Wire slave environment. Programmable, strong pullup features support 1-Wire Slew-Controlled 1-Wire Edges power delivery to 1-Wire devices such as EEPROMs Supports EEPROMs, Temperature Sensors, or Other and sensors. The DS2482-100 combines these features 1-Wire Slaves That Have Momentary High Source with an output to control an external MOSFET for Current Modes 2 enhanced strong pullup application. The I C slave Strong 1-Wire Pullup Provided by an Internal Low- address assignment is controlled by two binary Impedance Signal Path address inputs, resolving potential conflicts with other 2 I C slave devices in the system. PCTLZ Output to Optionally Control an External MOSFET for Stronger Pullup Requirements Applications Operating Range: 2.9V to 5.5V, -40C to +85C Printers Industrial Sensors 8-Pin (150 mils) SO and 9-Bump WLP Packages Medical Instruments Cell Phones, PDAs Pin Configurations and Ordering Information appear at end of data sheet. Typical Operating Circuit V CC CURRENT-LIMITING R * P RESISTOR REFER TO APPLICATION SDA NOTE 4206 2 (I C PORT) SCL PCTLZ OPTIONAL CIRCUITRY C DS2482-100 1-Wire LINE AD0 IO AD1 1-Wire 1-Wire 1-Wire DEVICE DEVICE DEVICE 2 *R = I C PULLUP RESISTOR (SEE THE APPLICATIONS INFORMATION SECTION FOR R SIZING). P P 1-Wire is a registered trademark of Maxim Integrated Products, Inc. 19-4930 Rev 10 1/15Single-Channel 1-Wire Master DS2482-100 Absolute Maximum Ratings Voltage Range on Any Pin Relative to Ground.........-0.5V to +6V Storage Temperature Range .............................-55C to +125C Maximum Current into Any Pin .........................................20mA Lead Temperature (SO only soldering, 10s)...................+300C Operating Temperature Range ...........................-40C to +85C Soldering Temperature (reflow) Junction Temperature......................................................+150C SO, WLP.......................................................................+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 absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics (V = 2.9V to 5.5V, T = -40C to +85C.) 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 1.9 1-Wire Input High (Notes 2, 3) V V IH1 5V 3.4 3.3V 0.9 1-Wire Input Low (Notes 2, 3) V V IL1 5V 1.2 1-Wire Weak Pullup Resistor R (Note 4) 1000 1675 WPU 1-Wire Output Low V At 4mA load 0.4 V OL1 Standard 2.3 2.5 2.7 Active Pullup On Time t s APUOT (Notes 4, 5) Overdrive 0.4 0.5 0.6 V 3.2V, 1.5mA load 0.3 CC Strong Pullup Voltage Drop V V STRPU V 5.2V, 3mA load 0.5 CC Standard (3.3V 10%) 1 4.2 Overdrive (3.3V 10%) 5 22.1 Pulldown Slew Rate (Note 6) PD V/s SRC Standard (5.0V 10%) 2 6.5 Overdrive (5.0V 10%) 10 40 Standard (3.3V 10%) 0.8 4 Overdrive (3.3V 10%) 2.7 20 Pullup Slew Rate (Note 6) PU V/s SRC Standard (5.0V 10%) 1.3 6 Overdrive (5.0V 10%) 3.4 31 Power-On Reset Trip Point V 2.2 V POR 1-Wire TIMING (Note 5) (See Figures 4, 5, and 6) Standard 7.6 8 8.4 Write-One/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 www.maximintegrated.com Maxim Integrated 2